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2,077 results on '"Berg, Christian"'

1. Indeterminate Stieltjes moment problems revisited

Author

Berg, Christian

Subjects
Mathematics - Functional Analysis, Mathematics - Classical Analysis and ODEs, 44A60, 30B50
Abstract

We consider a normalized indeterminate Hamburger moment sequence s which is supposed to be Stieltjes. We revisit old results about determinacy/indeterminacy in the sense of Stieltjes for s and we prove some new results about the concepts involved., Comment: 15 pages, 1 figure

Published
2024

2. A complete Bernstein function related to the fractal dimension of Pascal's pyramid modulo a prime

Author

Berg, Christian

Subjects
Mathematics - Classical Analysis and ODEs, Mathematics - Number Theory, 30E20, 26A48
Abstract

Let $f_r(x)=\log(1+rx)/\log(1+x)$ for $x>0$. We prove that $f_r$ is a complete Bernstein function for $0\le r\le 1$ and a Stieltjes function for $1\le r$. This answers a conjecture of David Bradley that $f_r$ is a Bernstein function when $0\le r\le 1$., Comment: 12 pages, 2 figures. To appear in Expositiones Mathematicae

Published
2024

5. Indeterminate Jacobi operators

Author

Berg, Christian and Szwarc, Ryszard

Subjects
Mathematics - Functional Analysis, Mathematics - Complex Variables, 47B25, 47B36, 44A60
Abstract

We consider the Jacobi operator (T,D(T)) associated with an indeterminate Hamburger moment problem, i.e., the operator in $\ell^2$ defined as the closure of the Jacobi matrix acting on the subspace of complex sequences with only finitely many non-zero terms. It is well-known that it is symmetric with deficiency indices (1,1). For a complex number z let $\mathfrak{p}_z, \mathfrak{q}_z$ denote the square summable sequences (p_n(z)) and (q_n(z)) corresponding to the orthonormal polynomials p_n and polynomials q_n of the second kind. We determine whether linear combinations of $\mathfrak{p}_u,\mathfrak{p}_v,\mathfrak{q}_u,\mathfrak{q}_v$ for complex u,v belong to D(T) or to the domain of the self-adjoint extensions of T in $\ell^2$. The results depend on the four Nevanlinna functions of two variables associated with the moment problem. We also show that D(T) is the common range of an explicitly constructed family of bounded operators on $\ell^2$., Comment: 29 pages

Published
2023

7. Leaving The World Behind

Author

Berg, Christian

Subjects
Fishes, Bears, Sports and fitness, Travel, recreation and leisure
Abstract

Bowhunting isn't about the kill. It's about the experience. That was especially true during the June 2023 black bear hunt Associate Editor Mark Demko and I enjoyed at All Terrain [...]

Published
2024

10. Self-adjoint operators associated with Hankel moment matrices

Author

Berg, Christian and Szwarc, Ryszard

Subjects
Mathematics - Functional Analysis, 47A05 (Primary) 47B25, 47B35 (Secondary)
Abstract

In a paper from 2016 D. R. Yafaev initiated a study of closable Hankel forms associated with the moments $(m_n)$ of a positive measure with infinite support on the real line. If $m_n=o(1)$ Yafaev characterized the closure of the form based on earlier work on quasi-Carleman operators. We give a new proof of the description of the closure based entirely on moment considerations. The main purpose of the present paper is a description of the self-adjoint Hankel operators associated with closed Hankel forms in the Hilbert space of square summable sequences. We do this not only in the case $m_n=o(1)$ studied by Yafaev but also in two other cases, where the Hankel form is closable, namely if the moment sequence is indeterminate or if the moment sequence is determinate with finite index of determinacy., Comment: 32 pages. Theorem 3.2 and Remark 3.4 are slightly reformulated to make the result and the proof more transparent

Published
2021
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11. Is Sustainability Utopian? Complex Challenges and Concrete Action Principles

Author

Berg, Christian, Fuller, Michael, Series Editor, Knutsson Brakenhielm, Lotta, Editorial Board Member, Bugajak, Grzegorz, Editorial Board Member, Evers, Dirk, Editorial Board Member, Harris, Mark, Editorial Board Member, Jackelén, Antje, Editorial Board Member, Karo, Roland, Editorial Board Member, Leach, Javier, Editorial Board Member, Meisinger, Hubert, Editorial Board Member, Oviedo, Lluis, Editorial Board Member, Revol, Fabien, Editorial Board Member, Sæther, Knut-Willy, Editorial Board Member, Uytterhoeven, Tom, Editorial Board Member, Leidenhag, Joanna, editor, and Runehov, Anne, editor

Published
2023
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12. Pronounced turnover of vascular plant species in Central European arable fields over 90 years

Author

Glaser, Michael, Dullinger, Stefan, Moser, Dietmar, Wessely, Johannes, Chytrý, Milan, Lososová, Zdeňka, Axmanová, Irena, Berg, Christian, Bürger, Jana, Buholzer, Serge, Buldrini, Fabrizio, Chiarucci, Alessandro, Follak, Swen, Küzmič, Filip, Meyer, Stefan, Pyšek, Petr, Richner, Nina, Šilc, Urban, Steinkellner, Siegrid, Wietzke, Alexander, and Essl, Franz

Published
2024
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13. A family of Horn-Bernstein functions

Author

Berg, Christian and Pedersen, Henrik L.

Subjects
Mathematics - Classical Analysis and ODEs, 44A10
Abstract

A family of recently investigated Bernstein functions is revisited and those functions for which the derivatives are logarithmically completely monotonic are identified. This leads to the definition of a class of Bernstein functions, which we propose to call Horn-Bernstein functions because of the results of Roger A. Horn., Comment: 14 pages references updated

Published
2020

14. Completely monotonic ratios of basic and ordinary gamma functions

Author

Berg, Christian, Cetinkaya, Asena, and Karp, Dmitrii

Subjects
Mathematics - Classical Analysis and ODEs, 33B15, 33D05, 26A48
Abstract

We investigate conditions for logarithmic complete monotonicity of product ratios of gamma and q-gamma functions whose arguments are linear functions of the variable. We give necessary and sufficient conditions in terms of nonnegativity of a certain explicitly written measure in the q case and of a certain elementary function in the classical q=1 case. In the latter case we further provide simple new sufficient conditions leading to many new examples of logarithmically completely monotonic gamma ratios. Finally, we apply some of our results to study monotonicity of some gamma ratios and rational functions., Comment: 23 pages; no figures

Published
2020

15. A unified view of space-time covariance functions through Gelfand pairs

Author

Berg, Christian

Subjects
Mathematics - Classical Analysis and ODEs, Mathematics - Statistics Theory, 43A25, 43A35, 43A75
Abstract

We give a characterization of positive definite integrable functions on a product of two Gelfand pairs as an integral of positive definite functions on one of the Gelfand pairs with respect to the Plancherel measure on the dual of the other Gelfand pair. In the very special case where the Gelfand pairs are Euclidean groups and the compact subgroups are reduced to the identity, the characterization is a much cited result in spatio-temporal statistics due to Cressie, Huang and Gneiting. When one of the Gelfand pairs is compact the characterization leads to results about expansions in spherical functions with positive definite expansion functions, thereby recovering recent results of the author in collaboration with Peron and Porcu. In the special case when the compact Gelfand pair consists of orthogonal groups, the characterization is important in geostatistics and covers a recent result of Porcu and White., Comment: 26 pages. New references. To appear in J. Fourier Anal. Appl

Published
2020
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17. Cognitive-driven ADL Impairment as a Predictor for PDD

Author

Sub-Investigator, Dr. Kathrin Brockmann, University Hospital of Tuebingen, Tuebingen, Germany, Advisory board, Prof. Dr. Thomas Gasser, University Hospital of Tuebingen, Tuebingen, Germany, Advisory board, Prof. Dr. Berg, Christian-Albrechts-University, Kiel, Germany, and PD Dr. Inga Liepelt-Scarfone, PhD

Published
2022

18. HIGH-TECH SUPER 7: These Revolutionary Innovations Have Changed the Bowhunting Game

Author

Berg, Christian

Subjects
Bowhunting, Batteries -- Innovations, Sports and fitness, Sports, sporting goods and toys industry
Abstract

Modern technology has revolutionized every area of society, and bowhunting is certainly no exception. A primitive pursuit that began some 1D.DDD years ago with sharpened sticks propelled by bent tree [...]

Published
2023

19. HOPE FOR A HISTORIC SEASON

Author

Berg, Christian

Subjects
Bowhunting, Sports and fitness, Travel, recreation and leisure
Abstract

DEPENDING ON where you live, archery deer season is either already here or so close you are counting down to opening day. Although I enjoy all kinds of bowhunting, chasing [...]

Published
2024

20. Nielsen's beta function and some infinitely divisible distributions

Author

Berg, Christian, Koumandos, Stamatis, and Pedersen, Henrik L.

Subjects
Mathematics - Classical Analysis and ODEs
Abstract

We show that a large collection of special functions, in particular Nielsen's beta function, are generalized Stieltjes functions of order 2, and therefore logarithmically completely monotonic. This includes the Laplace transform of functions of the form $xf(x)$, where $f$ is itself the Laplace transform of a sum of dilations and translations of periodic functions. Our methods are also applied to ratios of Gamma functions, and to the remainders in asymptotic expansions of the double Gamma function of Barnes., Comment: 32 pages

Published
2019

21. Closable Hankel operators and moment problems

Author

Berg, Christian and Szwarc, Ryszard

Subjects
Mathematics - Functional Analysis, 47A05, 47B25, 47B35
Abstract

In a paper from 2016 D. R. Yafaev considers Hankel operators associated with Hamburger moment sequences q_n and claims that the corresponding Hankel form is closable if and only if the moment sequence tends to 0. The claim is not correct, since we prove closability for any indeterminate moment sequence but also for certain determinate moment sequences corresponding to measures with finite index of determinacy. It is also established that Yafaev's result holds if the moments satisfy \root{2n}\of{q_{2n}}=o(n)., Comment: 10 pages. The notation for the closure of an operator A is changed to \overline{A} from \o A on pages 7,8

Published
2019

22. A family of entire functions connecting the Bessel function $J_1$ and the Lambert $W$ function

Author

Berg, Christian, Massa, Eugenio, and Peron, Ana P.

Subjects
Mathematics - Classical Analysis and ODEs, Mathematics - Complex Variables, 26A48, 30E20, 42A38, 33F05
Abstract

Motivated by the problem of determining the values of $\alpha>0$ for which $f_\alpha(x)=e^\alpha - (1+1/x)^{\alpha x},\ x>0$ is a completely monotonic function, we combine Fourier analysis with complex analysis to find a family $\varphi_\alpha$, $\alpha>0$, of entire functions such that $f_\alpha(x) =\int_0^\infty e^{-sx}\varphi_\alpha(s)\,ds, \ x>0.$ We show that each function $\varphi_\alpha$ has an expansion in power series, whose coefficients are determined in terms of Bell polynomials. This expansion leads to several properties of the functions $\varphi_\alpha$, which turn out to be related to the well known Bessel function $J_1$ and the Lambert $W$ function. On the other hand, by numerically evaluating the series expansion, we are able to show the behavior of $\varphi_\alpha$ as $\alpha$ increases from $0$ to $\infty$ and to obtain a very precise approximation of the largest $\alpha>0$ such that $\varphi_\alpha(s)\geq0,\, s>0$, or equivalently, such that $f_\alpha$ is completely monotonic., Comment: accepted for publication in Constructive Approximation

Published
2019
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24. A two-parameter extension of the Urbanik semigroup

Author

Berg, Christian

Subjects
Mathematics - Complex Variables, 60E07, 60B15, 44A60
Abstract

We prove that s_n(a,b)=\Gamma(an+b)/\Gamma(b), n=0,1,\ldots is an infinitely divisible Stieltjes moment sequence for arbitrary a,b>0. Its powers s_n(a,b)^c, c>0 are Stieltjes determinate if and only if ac\le 2. The latter was conjectured in a paper by Lin (ArXiv: 1711.01536) in the case b=1. We describe a product convolution semigroup \tau_c(a,b), c>0 of probability measures on the positive half-line with densities e_c(a,b) and having the moments s_n(a,b)^c. We determine the asymptotic behaviour of e_c(a,b)(t) for t\to 0 and for t\to\infty, and the latter implies the Stieltjes indeterminacy when ac>2. The results extend previous work of the author and J. L. L\'opez and lead to a convolution semigroup of probability densities (g_c(a,b)(x))_{c>0} on the real line. The special case (g_c(a,1)(x))_{c>0} are the convolution roots of the Gumbel distribution with scale parameter a>0. All the densities g_c(a,b)(x) lead to determinate Hamburger moment problems., Comment: 16 pages

Published
2018
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25. Inverse of Infinite Hankel Moment Matrices

Author

Berg, Christian and Szwarc, Ryszard

Subjects
Mathematics - Classical Analysis and ODEs, 42C05, 44A60, 47B36, 33D45, 60J80
Abstract

Let $(s_n)_{n\ge 0}$ denote an indeterminate Hamburger moment sequence and let $\mathcal H=\{s_{m+n}\}$ be the corresponding positive definite Hankel matrix. We consider the question if there exists an infinite symmetric matrix $\mathcal A=\{a_{j,k}\}$, which is an inverse of $\mathcal H$ in the sense that the matrix product $\mathcal A\mathcal H$ is defined by absolutely convergent series and $\mathcal A\mathcal H$ equals the identity matrix $\mathcal I$, a property called (aci). A candidate for $\mathcal A$ is the coefficient matrix of the reproducing kernel of the moment problem, considered as an entire function of two complex variables. We say that the moment problem has property (aci), if (aci) holds for this matrix $\mathcal A$. We show that this is true for many classical indeterminate moment problems but not for the symmetrized version of a cubic birth-and-death process studied by Valent and co-authors. We consider mainly symmetric indeterminate moment problems and give a number of sufficient conditions for (aci) to hold in terms of the recurrence coefficients for the orthonormal polynomials. A sufficient condition is a rapid increase of the recurrence coefficients in the sense that the quotient between consecutive terms is uniformly bounded by a constant strictly smaller than one. We also give a simple example, where (aci) holds, but an inverse matrix of $\mathcal H$ is highly non-unique.

Published
2018
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27. THE FINAL COUNTDOWN

Author

Berg, Christian

Subjects
Sports and fitness, Travel, recreation and leisure
Abstract

My youngest son graduated high school this spring, and by the time you read this, my wife and I will have dropped him off at college to begin his studies [...]

Published
2024

28. SPYPOINT FORCE-PRO-S 2.0: THE TRAIL CAM THAT JUST WON'T QUIT!

Author

Berg, Christian

Subjects
Solar energy, Sports and fitness, Travel, recreation and leisure
Abstract

THE ENERGIZER BUNNY is one of the most successful and recognizable mascots in the history of corporate marketing. Since making its debut way back in 1988, this relentless rabbit hasn't [...]

Published
2024

29. EXPECT THE BEST, BUT PREPARE FOR THE WORST

Author

Berg, Christian

Subjects
Bowhunting, Sports and fitness, Travel, recreation and leisure
Abstract

EACH AUGUST, the BOWHUNTER Big Game Special features incredible archery adventures, and this month's issue is certainly no exception, I am confident you'll be entertained and inspired as you read [...]

Published
2024

30. UNFORGETTABLE ADVENTURE

Author

Berg, Christian

Subjects
Sheep, Sports and fitness, Travel, recreation and leisure
Abstract

I WAS 9.000 MILES from home standing atop a ridge somewhere on New Zealand's South Island--glassing a herd of Pitt Island sheep feeding along a creek in the valley below. [...]

Published
2024

31. Schoenberg's theorem for real and complex Hilbert spheres revisited

Author

Berg, Christian, Peron, Ana P., and Porcu, Emilio

Subjects
Mathematics - Classical Analysis and ODEs, 43A35, 33C45, 33C55
Abstract

Schoenberg's theorem for the complex Hilbert sphere proved by Christensen and Ressel in 1982 by Choquet theory is extended to the following result: Let L denote a locally compact group and let \overline{\D} denote the closed unit disc in the complex plane. Continuous functions f:\overline{\D}\times L\to \C such that f(\xi \cdot \eta,u^{-1}v) is a positive definite kernel on the product of the unit sphere in \ell_2(\C) and L are characterized as the functions with a uniformly convergent expansion f(z,u)=\sum_{m,n=0}^\infty \varphi_{m,n}(u)z^m\overline{z}^n, where \varphi_{m,n} is a double sequence of continuous positive definite functions on L such that \sum\varphi_{m,n}(e_L)<\infty (e_L is the neutral element of L). It is shown how the coefficient functions \varphi_{m,n} are obtained as limits from expansions for positive definite functions on finite dimensional complex spheres via a Rodrigues formula for disc polynomials. Similar results are obtained for the real Hilbert sphere., Comment: 22 pages

Published
2017
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32. ReSurveyGermany: Vegetation-plot time-series over the past hundred years in Germany

Author

Jandt, Ute, Bruelheide, Helge, Berg, Christian, Bernhardt-Römermann, Markus, Blüml, Volker, Bode, Frank, Dengler, Jürgen, Diekmann, Martin, Dierschke, Hartmut, Doerfler, Inken, Döring, Ute, Dullinger, Stefan, Härdtle, Werner, Haider, Sylvia, Heinken, Thilo, Horchler, Peter, Jansen, Florian, Kudernatsch, Thomas, Kuhn, Gisbert, Lindner, Martin, Matesanz, Silvia, Metze, Katrin, Meyer, Stefan, Müller, Frank, Müller, Norbert, Naaf, Tobias, Peppler-Lisbach, Cord, Poschlod, Peter, Roscher, Christiane, Rosenthal, Gert, Rumpf, Sabine B., Schmidt, Wolfgang, Schrautzer, Joachim, Schwabe, Angelika, Schwartze, Peter, Sperle, Thomas, Stanik, Nils, Stroh, Hans-Georg, Storm, Christian, Voigt, Winfried, von Heßberg, Andreas, von Oheimb, Goddert, Wagner, Eva-Rosa, Wegener, Uwe, Wesche, Karsten, Wittig, Burghard, and Wulf, Monika

Published
2022
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34. 4 SIMPLE BOW-TUNING TRICKS: BOOST YOUR ACCURACY WITH THESE FAST FIXES

Author

Berg, Christian

Subjects
Bow and arrow -- Evaluation, Sports and fitness, Sports, sporting goods and toys industry
Abstract

There's no deeper rabbit hold in archery than bow tuning. If you don't believe me, visit a dozen pro shops and ask for their best bow-tuning advice. You'll likely get [...]

Published
2022

35. FOOD PLOTS FOR IDIOTS: Improving Hunting Habitat Isn't Rocket Science!

Author

Berg, Christian

Subjects
Hunting, Sports and fitness, Sports, sporting goods and toys industry
Abstract

YOU'VE PROBABLY SEEN the long-running 'Idiot's Guides' series of reference books. Their purpose is to take complex topics and explain them so clearly even those of marginal intelligence can understand. [...]

Published
2022

36. Orthogonal expansions related to compact Gelfand pairs

Author

Berg, Christian, Peron, Ana P., and Porcu, Emilio

Subjects
Mathematics - Classical Analysis and ODEs, Primary 43A35, 43A85, 43A90, secondary 33C45, 33C55
Abstract

Given a compact Gelfand pair (G,K) and a locally compact group L, we characterize the class P_K^\sharp(G,L) of continuous positive definite functions f:G\times L\to \C which are bi-invariant in the G-variable with respect to K. The functions of this class are the functions having a uniformly convergent expansion \sum_{\varphi\in Z} B(\varphi)(u)\varphi(x) for x\in G,u\in L, where the sum is over the space Z of positive definite spherical functions \varphi:G\to\C for the Gelfand pair, and (B(\varphi))_{\varphi\in Z} is a family of continuous positive definite functions on L such that \sum_{\varphi\in Z}B(\varphi)(e_L)<\infty. Here e_L is the neutral element of the group L. For a compact abelian group G considered as a Gelfand pair (G,K) with trivial K=\{e_G\}, we obtain a characterization of P(G\times L) in terms of Fourier expansions on the dual group \widehat{G}. The result is described in detail for the case of the Gelfand pairs (O(d+1),O(d)) and (U(q),U(q-1)) as well as for the product of these Gelfand pairs. The result generalizes recent theorems of Berg-Porcu (2016) and Guella-Menegatto (2016), Comment: 21 pages

Published
2016
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37. Solvability of the Hankel determinant problem for real sequences

Author

Bakan, Andrew and Berg, Christian

Subjects
Mathematics - Classical Analysis and ODEs, 44A60, 47B36, 15A15, 15A63
Abstract

To each nonzero sequence $s:= \{s_{n}\}_{n \geq 0}$ of real numbers we associate the Hankel determinants $D_{n} = \det \mathcal{H}_{n}$ of the Hankel matrices $\mathcal{H}_{n}:= (s_{i + j})_{i, j = 0}^{n}$, $n \geq 0$, and the nonempty set $N_{s}:= \{n \geq 1 \, | \, D_{n-1} \neq 0 \}$. We also define the Hankel determinant polynomials $P_0:=1$, and $P_n$, $n\geq 1$ as the determinant of the Hankel matrix $\mathcal H_n$ modified by replacing the last row by the monomials $1, x, \ldots, x^n$. Clearly $P_n$ is a polynomial of degree at most $n$ and of degree $n$ if and only if $n\in N_s $. Kronecker established in 1881 that if $N_s $ is finite then rank $\mathcal{H}_{n} = r$ for each $n \geq r-1$, where $r := \max N_s $. By using an approach suggested by I.S.Iohvidov in 1969 we give a short proof of this result and a transparent proof of the conditions on a real sequence $\{t_n\}_{n\geq 0}$ to be of the form $t_n=D_n$, $n\geq 0$ for a real sequence $\{s_n\}_{n\geq 0}$. This is the Hankel determinant problem. We derive from the Kronecker identities that each Hankel determinant polynomial $ P_n $ satisfying deg$P_n = n\geq 1$ is preceded by a nonzero polynomial $P_{n-1}$ whose degree can be strictly less than $n-1$ and which has no common zeros with $ P_n $. As an application of our results we obtain a new proof of a recent theorem by Berg and Szwarc about positive semidefiniteness of all Hankel matrices provided that $D_0 > 0, \ldots, D_{r-1} > 0 $ and $D_n=0$ for all $n\geq r$., Comment: 19 pages

Published
2016

38. BOWS

Author

Berg, Christian

Subjects
Bow and arrow, Sports and fitness, Sports, sporting goods and toys industry, Mazda RX-7 (Automobile)
Abstract

A FINE LINE [PRIME INLINE SERIES] The new Inline bow series from Prime Archery aims to take accuracy and feel to a whole new level, The Inline 1, Inline 3 [...]

Published
2022

39. ReSurveyEurope : A database of resurveyed vegetation plots in Europe

Author

Knollová, Ilona, Chytrý, Milan, Bruelheide, Helge, Dullinger, Stefan, Jandt, Ute, Bernhardt-Römermann, Markus, Biurrun, Idoia, de Bello, Francesco, Glaser, Michael, Hennekens, Stephan, Jansen, Florian, Jiménez-Alfaro, Borja, Kadaš, Daniel, Kaplan, Ekin, Klinkovská, Klára, Lenzner, Bernd, Pauli, Harald, Sperandii, Marta Gaia, Verheyen, Kris, Winkler, Manuela, Abdaladze, Otar, Aćić, Svetlana, Acosta, Alicia T.R., Alignier, Audrey, Andrews, Christopher, Arlettaz, Raphaël, Attorre, Fabio, Axmanová, Irena, Babbi, Manuel, Baeten, Lander, Baran, Jakub, Barni, Elena, Benito-Alonso, José Luis, Berg, Christian, Bergamini, Ariel, Berki, Imre, Boch, Steffen, Bock, Barbara, Bode, Frank, Bonari, Gianmaria, Boublík, Karel, Britton, Andrea J., Brunet, Jörg, Bruzzaniti, Vanessa, Buholzer, Serge, Burrascano, Sabina, Campos, Juan A., Carlsson, Bengt Göran, Carranza, Maria Laura, Černý, Tomáš, Charmillot, Kévin, Chiarucci, Alessandro, Choler, Philippe, Chytrý, Kryštof, Corcket, Emmanuel, Csecserits, Anikó, Cutini, Maurizio, Czarniecka-Wiera, Marta, Danihelka, Jiří, de Francesco, Maria Carla, De Frenne, Pieter, Di Musciano, Michele, De Sanctis, Michele, Deák, Balázs, Decocq, Guillaume, Dembicz, Iwona, Dengler, Jürgen, Di Cecco, Valter, Dick, Jan, Diekmann, Martin, Dierschke, Hartmut, Dirnböck, Thomas, Doerfler, Inken, Doležal, Jiří, Döring, Ute, Durak, Tomasz, Dwyer, Ciara, Ejrnæs, Rasmus, Ermakova, Inna, Erschbamer, Brigitta, Fanelli, Giuliano, Fernández-Calzado, María Rosa, Fickert, Thomas, Fischer, Andrea, Fischer, Markus, Foremnik, Kacper, Frouz, Jan, García-González, Ricardo, García-Magro, Daniel, García-Mijangos, Itziar, Gavilán, Rosario G., Germ, Mateja, Ghosn, Dany, Gigauri, Khatuna, Gizela, Jaroslav, Golob, Aleksandra, Golub, Valentin, Gómez-García, Daniel, Gowing, David, Grytnes, John Arvid, Güler, Behlül, Gutiérrez-Girón, Alba, Haase, Peter, Haider, Sylvia, Hájek, Michal, Halassy, Melinda, Harásek, Martin, Härdtle, Werner, Heinken, Thilo, Hester, Alison, Humbert, Jean Yves, Ibáñez, Ricardo, Illa, Estela, Jaroszewicz, Bogdan, Jensen, Kai, Jentsch, Anke, Jiroušek, Martin, Kalníková, Veronika, Kanka, Róbert, Kapfer, Jutta, Kazakis, George, Kermavnar, Janez, Kesting, Stefan, Khanina, Larisa, Kindermann, Elisabeth, Kotrík, Marek, Koutecký, Tomáš, Kozub, Łukasz, Kuhn, Gisbert, Kutnar, Lado, La Montagna, Dario, Lamprecht, Andrea, Lenoir, Jonathan, Lepš, Jan, Leuschner, Christoph, Lorite, Juan, Madsen, Bjarke, Ugarte, Rosina Magaña, Malicki, Marek, Maliniemi, Tuija, Máliš, František, Maringer, Alexander, Marrs, Robert, Matesanz, Silvia, Metze, Katrin, Meyer, Stefan, Millett, Jonathan, Mitchell, Ruth J., Moeslund, Jesper Erenskjold, Moiseev, Pavel, di Cella, Umberto Morra, Mudrák, Ondřej, Müller, Frank, Müller, Norbert, Naaf, Tobias, Nagy, Laszlo, Napoleone, Francesca, Nascimbene, Juri, Navrátilová, Jana, Ninot, Josep M., Niu, Yujie, Normand, Signe, Ogaya, Romá, Onipchenko, Vladimir, Orczewska, Anna, Ortmann-Ajkai, Adrienne, Pakeman, Robin J., Pardo, Iker, Pätsch, Ricarda, Peet, Robert K., Penuelas, Josep, Peppler-Lisbach, Cord, Pérez-Hernández, Javier, Pérez-Haase, Aaron, Petraglia, Alessandro, Petřík, Petr, Pielech, Remigiusz, Piórkowski, Hubert, Pladevall-Izard, Eulàlia, Poschlod, Peter, Prach, Karel, Praleskouskaya, Safiya, Prokhorov, Vadim, Provoost, Sam, Pușcaș, Mihai, Pustková, Štěpánka, Randin, Christophe François, Rašomavičius, Valerijus, Reczyńska, Kamila, Rédei, Tamás, Řehounková, Klára, Richner, Nina, Risch, Anita C., Rixen, Christian, Rosbakh, Sergey, Roscher, Christiane, Rosenthal, Gert, Rossi, Graziano, Rötzer, Harald, Roux, Camille, Rumpf, Sabine B., Ruprecht, Eszter, Rūsiņa, Solvita, Sanz-Zubizarreta, Irati, Schindler, Meret, Schmidt, Wolfgang, Schories, Dirk, Schrautzer, Joachim, Schubert, Hendrik, Schuetz, Martin, Schwabe, Angelika, Schwaiger, Helena, Schwartze, Peter, Šebesta, Jan, Seiler, Hallie, Šilc, Urban, Silva, Vasco, Šmilauer, Petr, Šmilauerová, Marie, Sperle, Thomas, Stachurska-Swakoń, Alina, Stanik, Nils, Stanisci, Angela, Steffen, Kristina, Storm, Christian, Stroh, Hans Georg, Sugorkina, Nadezhda, Świerkosz, Krzysztof, Świerszcz, Sebastian, Szymura, Magdalena, Teleki, Balázs, Thébaud, Gilles, Theurillat, Jean Paul, Tichý, Lubomír, Treier, Urs A., Turtureanu, Pavel Dan, Ujházy, Karol, Ujházyová, Mariana, Ursu, Tudor Mihai, Uziębło, Aldona K., Valkó, Orsolya, Van Calster, Hans, Van Meerbeek, Koenraad, Vandevoorde, Bart, Vandvik, Vigdis, Varricchione, Marco, Vassilev, Kiril, Villar, Luis, Virtanen, Risto, Vittoz, Pascal, Voigt, Winfried, von Hessberg, Andreas, von Oheimb, Goddert, Wagner, Eva, Walther, Gian Reto, Wellstein, Camilla, Wesche, Karsten, Wilhelm, Markus, Willner, Wolfgang, Wipf, Sonja, Wittig, Burghard, Wohlgemuth, Thomas, Woodcock, Ben A., Wulf, Monika, Essl, Franz, Knollová, Ilona, Chytrý, Milan, Bruelheide, Helge, Dullinger, Stefan, Jandt, Ute, Bernhardt-Römermann, Markus, Biurrun, Idoia, de Bello, Francesco, Glaser, Michael, Hennekens, Stephan, Jansen, Florian, Jiménez-Alfaro, Borja, Kadaš, Daniel, Kaplan, Ekin, Klinkovská, Klára, Lenzner, Bernd, Pauli, Harald, Sperandii, Marta Gaia, Verheyen, Kris, Winkler, Manuela, Abdaladze, Otar, Aćić, Svetlana, Acosta, Alicia T.R., Alignier, Audrey, Andrews, Christopher, Arlettaz, Raphaël, Attorre, Fabio, Axmanová, Irena, Babbi, Manuel, Baeten, Lander, Baran, Jakub, Barni, Elena, Benito-Alonso, José Luis, Berg, Christian, Bergamini, Ariel, Berki, Imre, Boch, Steffen, Bock, Barbara, Bode, Frank, Bonari, Gianmaria, Boublík, Karel, Britton, Andrea J., Brunet, Jörg, Bruzzaniti, Vanessa, Buholzer, Serge, Burrascano, Sabina, Campos, Juan A., Carlsson, Bengt Göran, Carranza, Maria Laura, Černý, Tomáš, Charmillot, Kévin, Chiarucci, Alessandro, Choler, Philippe, Chytrý, Kryštof, Corcket, Emmanuel, Csecserits, Anikó, Cutini, Maurizio, Czarniecka-Wiera, Marta, Danihelka, Jiří, de Francesco, Maria Carla, De Frenne, Pieter, Di Musciano, Michele, De Sanctis, Michele, Deák, Balázs, Decocq, Guillaume, Dembicz, Iwona, Dengler, Jürgen, Di Cecco, Valter, Dick, Jan, Diekmann, Martin, Dierschke, Hartmut, Dirnböck, Thomas, Doerfler, Inken, Doležal, Jiří, Döring, Ute, Durak, Tomasz, Dwyer, Ciara, Ejrnæs, Rasmus, Ermakova, Inna, Erschbamer, Brigitta, Fanelli, Giuliano, Fernández-Calzado, María Rosa, Fickert, Thomas, Fischer, Andrea, Fischer, Markus, Foremnik, Kacper, Frouz, Jan, García-González, Ricardo, García-Magro, Daniel, García-Mijangos, Itziar, Gavilán, Rosario G., Germ, Mateja, Ghosn, Dany, Gigauri, Khatuna, Gizela, Jaroslav, Golob, Aleksandra, Golub, Valentin, Gómez-García, Daniel, Gowing, David, Grytnes, John Arvid, Güler, Behlül, Gutiérrez-Girón, Alba, Haase, Peter, Haider, Sylvia, Hájek, Michal, Halassy, Melinda, Harásek, Martin, Härdtle, Werner, Heinken, Thilo, Hester, Alison, Humbert, Jean Yves, Ibáñez, Ricardo, Illa, Estela, Jaroszewicz, Bogdan, Jensen, Kai, Jentsch, Anke, Jiroušek, Martin, Kalníková, Veronika, Kanka, Róbert, Kapfer, Jutta, Kazakis, George, Kermavnar, Janez, Kesting, Stefan, Khanina, Larisa, Kindermann, Elisabeth, Kotrík, Marek, Koutecký, Tomáš, Kozub, Łukasz, Kuhn, Gisbert, Kutnar, Lado, La Montagna, Dario, Lamprecht, Andrea, Lenoir, Jonathan, Lepš, Jan, Leuschner, Christoph, Lorite, Juan, Madsen, Bjarke, Ugarte, Rosina Magaña, Malicki, Marek, Maliniemi, Tuija, Máliš, František, Maringer, Alexander, Marrs, Robert, Matesanz, Silvia, Metze, Katrin, Meyer, Stefan, Millett, Jonathan, Mitchell, Ruth J., Moeslund, Jesper Erenskjold, Moiseev, Pavel, di Cella, Umberto Morra, Mudrák, Ondřej, Müller, Frank, Müller, Norbert, Naaf, Tobias, Nagy, Laszlo, Napoleone, Francesca, Nascimbene, Juri, Navrátilová, Jana, Ninot, Josep M., Niu, Yujie, Normand, Signe, Ogaya, Romá, Onipchenko, Vladimir, Orczewska, Anna, Ortmann-Ajkai, Adrienne, Pakeman, Robin J., Pardo, Iker, Pätsch, Ricarda, Peet, Robert K., Penuelas, Josep, Peppler-Lisbach, Cord, Pérez-Hernández, Javier, Pérez-Haase, Aaron, Petraglia, Alessandro, Petřík, Petr, Pielech, Remigiusz, Piórkowski, Hubert, Pladevall-Izard, Eulàlia, Poschlod, Peter, Prach, Karel, Praleskouskaya, Safiya, Prokhorov, Vadim, Provoost, Sam, Pușcaș, Mihai, Pustková, Štěpánka, Randin, Christophe François, Rašomavičius, Valerijus, Reczyńska, Kamila, Rédei, Tamás, Řehounková, Klára, Richner, Nina, Risch, Anita C., Rixen, Christian, Rosbakh, Sergey, Roscher, Christiane, Rosenthal, Gert, Rossi, Graziano, Rötzer, Harald, Roux, Camille, Rumpf, Sabine B., Ruprecht, Eszter, Rūsiņa, Solvita, Sanz-Zubizarreta, Irati, Schindler, Meret, Schmidt, Wolfgang, Schories, Dirk, Schrautzer, Joachim, Schubert, Hendrik, Schuetz, Martin, Schwabe, Angelika, Schwaiger, Helena, Schwartze, Peter, Šebesta, Jan, Seiler, Hallie, Šilc, Urban, Silva, Vasco, Šmilauer, Petr, Šmilauerová, Marie, Sperle, Thomas, Stachurska-Swakoń, Alina, Stanik, Nils, Stanisci, Angela, Steffen, Kristina, Storm, Christian, Stroh, Hans Georg, Sugorkina, Nadezhda, Świerkosz, Krzysztof, Świerszcz, Sebastian, Szymura, Magdalena, Teleki, Balázs, Thébaud, Gilles, Theurillat, Jean Paul, Tichý, Lubomír, Treier, Urs A., Turtureanu, Pavel Dan, Ujházy, Karol, Ujházyová, Mariana, Ursu, Tudor Mihai, Uziębło, Aldona K., Valkó, Orsolya, Van Calster, Hans, Van Meerbeek, Koenraad, Vandevoorde, Bart, Vandvik, Vigdis, Varricchione, Marco, Vassilev, Kiril, Villar, Luis, Virtanen, Risto, Vittoz, Pascal, Voigt, Winfried, von Hessberg, Andreas, von Oheimb, Goddert, Wagner, Eva, Walther, Gian Reto, Wellstein, Camilla, Wesche, Karsten, Wilhelm, Markus, Willner, Wolfgang, Wipf, Sonja, Wittig, Burghard, Wohlgemuth, Thomas, Woodcock, Ben A., Wulf, Monika, and Essl, Franz

Abstract

Aims: We introduce ReSurveyEurope — a new data source of resurveyed vegetation plots in Europe, compiled by a collaborative network of vegetation scientists. We describe the scope of this initiative, provide an overview of currently available data, governance, data contribution rules, and accessibility. In addition, we outline further steps, including potential research questions. Results: ReSurveyEurope includes resurveyed vegetation plots from all habitats. Version 1.0 of ReSurveyEurope contains 283,135 observations (i.e., individual surveys of each plot) from 79,190 plots sampled in 449 independent resurvey projects. Of these, 62,139 (78%) are permanent plots, that is, marked in situ, or located with GPS, which allow for high spatial accuracy in resurvey. The remaining 17,051 (22%) plots are from studies in which plots from the initial survey could not be exactly relocated. Four data sets, which together account for 28,470 (36%) plots, provide only presence/absence information on plant species, while the remaining 50,720 (64%) plots contain abundance information (e.g., percentage cover or cover–abundance classes such as variants of the Braun-Blanquet scale). The oldest plots were sampled in 1911 in the Swiss Alps, while most plots were sampled between 1950 and 2020. Conclusions: ReSurveyEurope is a new resource to address a wide range of research questions on fine-scale changes in European vegetation. The initiative is devoted to an inclusive and transparent governance and data usage approach, based on slightly adapted rules of the well-established European Vegetation Archive (EVA). ReSurveyEurope data are ready for use, and proposals for analyses of the data set can be submitted at any time to the coordinators. Still, further data contributions are highly welcome.

Published
2024

40. ReSurveyEurope:A database of resurveyed vegetation plots in Europe

Author

Knollová, Ilona, Chytrý, Milan, Bruelheide, Helge, Dullinger, Stefan, Jandt, Ute, Bernhardt-Römermann, Markus, Biurrun, Idoia, de Bello, Francesco, Glaser, Michael, Hennekens, Stephan, Jansen, Florian, Jiménez-Alfaro, Borja, Kadaš, Daniel, Kaplan, Ekin, Klinkovská, Klára, Lenzner, Bernd, Pauli, Harald, Sperandii, Marta Gaia, Verheyen, Kris, Winkler, Manuela, Abdaladze, Otar, Aćić, Svetlana, Acosta, Alicia T.R., Alignier, Audrey, Andrews, Christopher, Arlettaz, Raphaël, Attorre, Fabio, Axmanová, Irena, Babbi, Manuel, Baeten, Lander, Baran, Jakub, Barni, Elena, Benito-Alonso, José Luis, Berg, Christian, Bergamini, Ariel, Berki, Imre, Boch, Steffen, Bock, Barbara, Bode, Frank, Bonari, Gianmaria, Boublík, Karel, Britton, Andrea J., Brunet, Jörg, Bruzzaniti, Vanessa, Buholzer, Serge, Burrascano, Sabina, Campos, Juan A., Carlsson, Bengt Göran, Carranza, Maria Laura, Černý, Tomáš, Charmillot, Kévin, Chiarucci, Alessandro, Choler, Philippe, Chytrý, Kryštof, Corcket, Emmanuel, Csecserits, Anikó, Cutini, Maurizio, Czarniecka-Wiera, Marta, Danihelka, Jiří, de Francesco, Maria Carla, De Frenne, Pieter, Di Musciano, Michele, De Sanctis, Michele, Deák, Balázs, Decocq, Guillaume, Dembicz, Iwona, Dengler, Jürgen, Di Cecco, Valter, Dick, Jan, Diekmann, Martin, Dierschke, Hartmut, Dirnböck, Thomas, Doerfler, Inken, Doležal, Jiří, Döring, Ute, Durak, Tomasz, Dwyer, Ciara, Ejrnæs, Rasmus, Ermakova, Inna, Erschbamer, Brigitta, Fanelli, Giuliano, Fernández-Calzado, María Rosa, Fickert, Thomas, Fischer, Andrea, Fischer, Markus, Foremnik, Kacper, Frouz, Jan, García-González, Ricardo, García-Magro, Daniel, García-Mijangos, Itziar, Gavilán, Rosario G., Germ, Mateja, Ghosn, Dany, Gigauri, Khatuna, Gizela, Jaroslav, Golob, Aleksandra, Golub, Valentin, Gómez-García, Daniel, Gowing, David, Grytnes, John Arvid, Güler, Behlül, Gutiérrez-Girón, Alba, Haase, Peter, Haider, Sylvia, Hájek, Michal, Halassy, Melinda, Harásek, Martin, Härdtle, Werner, Heinken, Thilo, Hester, Alison, Humbert, Jean Yves, Ibáñez, Ricardo, Illa, Estela, Jaroszewicz, Bogdan, Jensen, Kai, Jentsch, Anke, Jiroušek, Martin, Kalníková, Veronika, Kanka, Róbert, Kapfer, Jutta, Kazakis, George, Kermavnar, Janez, Kesting, Stefan, Khanina, Larisa, Kindermann, Elisabeth, Kotrík, Marek, Koutecký, Tomáš, Kozub, Łukasz, Kuhn, Gisbert, Kutnar, Lado, La Montagna, Dario, Lamprecht, Andrea, Lenoir, Jonathan, Lepš, Jan, Leuschner, Christoph, Lorite, Juan, Madsen, Bjarke, Ugarte, Rosina Magaña, Malicki, Marek, Maliniemi, Tuija, Máliš, František, Maringer, Alexander, Marrs, Robert, Matesanz, Silvia, Metze, Katrin, Meyer, Stefan, Millett, Jonathan, Mitchell, Ruth J., Moeslund, Jesper Erenskjold, Moiseev, Pavel, di Cella, Umberto Morra, Mudrák, Ondřej, Müller, Frank, Müller, Norbert, Naaf, Tobias, Nagy, Laszlo, Napoleone, Francesca, Nascimbene, Juri, Navrátilová, Jana, Ninot, Josep M., Niu, Yujie, Normand, Signe, Ogaya, Romá, Onipchenko, Vladimir, Orczewska, Anna, Ortmann-Ajkai, Adrienne, Pakeman, Robin J., Pardo, Iker, Pätsch, Ricarda, Peet, Robert K., Penuelas, Josep, Peppler-Lisbach, Cord, Pérez-Hernández, Javier, Pérez-Haase, Aaron, Petraglia, Alessandro, Petřík, Petr, Pielech, Remigiusz, Piórkowski, Hubert, Pladevall-Izard, Eulàlia, Poschlod, Peter, Prach, Karel, Praleskouskaya, Safiya, Prokhorov, Vadim, Provoost, Sam, Pușcaș, Mihai, Pustková, Štěpánka, Randin, Christophe François, Rašomavičius, Valerijus, Reczyńska, Kamila, Rédei, Tamás, Řehounková, Klára, Richner, Nina, Risch, Anita C., Rixen, Christian, Rosbakh, Sergey, Roscher, Christiane, Rosenthal, Gert, Rossi, Graziano, Rötzer, Harald, Roux, Camille, Rumpf, Sabine B., Ruprecht, Eszter, Rūsiņa, Solvita, Sanz-Zubizarreta, Irati, Schindler, Meret, Schmidt, Wolfgang, Schories, Dirk, Schrautzer, Joachim, Schubert, Hendrik, Schuetz, Martin, Schwabe, Angelika, Schwaiger, Helena, Schwartze, Peter, Šebesta, Jan, Seiler, Hallie, Šilc, Urban, Silva, Vasco, Šmilauer, Petr, Šmilauerová, Marie, Sperle, Thomas, Stachurska-Swakoń, Alina, Stanik, Nils, Stanisci, Angela, Steffen, Kristina, Storm, Christian, Stroh, Hans Georg, Sugorkina, Nadezhda, Świerkosz, Krzysztof, Świerszcz, Sebastian, Szymura, Magdalena, Teleki, Balázs, Thébaud, Gilles, Theurillat, Jean Paul, Tichý, Lubomír, Treier, Urs A., Turtureanu, Pavel Dan, Ujházy, Karol, Ujházyová, Mariana, Ursu, Tudor Mihai, Uziębło, Aldona K., Valkó, Orsolya, Van Calster, Hans, Van Meerbeek, Koenraad, Vandevoorde, Bart, Vandvik, Vigdis, Varricchione, Marco, Vassilev, Kiril, Villar, Luis, Virtanen, Risto, Vittoz, Pascal, Voigt, Winfried, von Hessberg, Andreas, von Oheimb, Goddert, Wagner, Eva, Walther, Gian Reto, Wellstein, Camilla, Wesche, Karsten, Wilhelm, Markus, Willner, Wolfgang, Wipf, Sonja, Wittig, Burghard, Wohlgemuth, Thomas, Woodcock, Ben A., Wulf, Monika, Essl, Franz, Knollová, Ilona, Chytrý, Milan, Bruelheide, Helge, Dullinger, Stefan, Jandt, Ute, Bernhardt-Römermann, Markus, Biurrun, Idoia, de Bello, Francesco, Glaser, Michael, Hennekens, Stephan, Jansen, Florian, Jiménez-Alfaro, Borja, Kadaš, Daniel, Kaplan, Ekin, Klinkovská, Klára, Lenzner, Bernd, Pauli, Harald, Sperandii, Marta Gaia, Verheyen, Kris, Winkler, Manuela, Abdaladze, Otar, Aćić, Svetlana, Acosta, Alicia T.R., Alignier, Audrey, Andrews, Christopher, Arlettaz, Raphaël, Attorre, Fabio, Axmanová, Irena, Babbi, Manuel, Baeten, Lander, Baran, Jakub, Barni, Elena, Benito-Alonso, José Luis, Berg, Christian, Bergamini, Ariel, Berki, Imre, Boch, Steffen, Bock, Barbara, Bode, Frank, Bonari, Gianmaria, Boublík, Karel, Britton, Andrea J., Brunet, Jörg, Bruzzaniti, Vanessa, Buholzer, Serge, Burrascano, Sabina, Campos, Juan A., Carlsson, Bengt Göran, Carranza, Maria Laura, Černý, Tomáš, Charmillot, Kévin, Chiarucci, Alessandro, Choler, Philippe, Chytrý, Kryštof, Corcket, Emmanuel, Csecserits, Anikó, Cutini, Maurizio, Czarniecka-Wiera, Marta, Danihelka, Jiří, de Francesco, Maria Carla, De Frenne, Pieter, Di Musciano, Michele, De Sanctis, Michele, Deák, Balázs, Decocq, Guillaume, Dembicz, Iwona, Dengler, Jürgen, Di Cecco, Valter, Dick, Jan, Diekmann, Martin, Dierschke, Hartmut, Dirnböck, Thomas, Doerfler, Inken, Doležal, Jiří, Döring, Ute, Durak, Tomasz, Dwyer, Ciara, Ejrnæs, Rasmus, Ermakova, Inna, Erschbamer, Brigitta, Fanelli, Giuliano, Fernández-Calzado, María Rosa, Fickert, Thomas, Fischer, Andrea, Fischer, Markus, Foremnik, Kacper, Frouz, Jan, García-González, Ricardo, García-Magro, Daniel, García-Mijangos, Itziar, Gavilán, Rosario G., Germ, Mateja, Ghosn, Dany, Gigauri, Khatuna, Gizela, Jaroslav, Golob, Aleksandra, Golub, Valentin, Gómez-García, Daniel, Gowing, David, Grytnes, John Arvid, Güler, Behlül, Gutiérrez-Girón, Alba, Haase, Peter, Haider, Sylvia, Hájek, Michal, Halassy, Melinda, Harásek, Martin, Härdtle, Werner, Heinken, Thilo, Hester, Alison, Humbert, Jean Yves, Ibáñez, Ricardo, Illa, Estela, Jaroszewicz, Bogdan, Jensen, Kai, Jentsch, Anke, Jiroušek, Martin, Kalníková, Veronika, Kanka, Róbert, Kapfer, Jutta, Kazakis, George, Kermavnar, Janez, Kesting, Stefan, Khanina, Larisa, Kindermann, Elisabeth, Kotrík, Marek, Koutecký, Tomáš, Kozub, Łukasz, Kuhn, Gisbert, Kutnar, Lado, La Montagna, Dario, Lamprecht, Andrea, Lenoir, Jonathan, Lepš, Jan, Leuschner, Christoph, Lorite, Juan, Madsen, Bjarke, Ugarte, Rosina Magaña, Malicki, Marek, Maliniemi, Tuija, Máliš, František, Maringer, Alexander, Marrs, Robert, Matesanz, Silvia, Metze, Katrin, Meyer, Stefan, Millett, Jonathan, Mitchell, Ruth J., Moeslund, Jesper Erenskjold, Moiseev, Pavel, di Cella, Umberto Morra, Mudrák, Ondřej, Müller, Frank, Müller, Norbert, Naaf, Tobias, Nagy, Laszlo, Napoleone, Francesca, Nascimbene, Juri, Navrátilová, Jana, Ninot, Josep M., Niu, Yujie, Normand, Signe, Ogaya, Romá, Onipchenko, Vladimir, Orczewska, Anna, Ortmann-Ajkai, Adrienne, Pakeman, Robin J., Pardo, Iker, Pätsch, Ricarda, Peet, Robert K., Penuelas, Josep, Peppler-Lisbach, Cord, Pérez-Hernández, Javier, Pérez-Haase, Aaron, Petraglia, Alessandro, Petřík, Petr, Pielech, Remigiusz, Piórkowski, Hubert, Pladevall-Izard, Eulàlia, Poschlod, Peter, Prach, Karel, Praleskouskaya, Safiya, Prokhorov, Vadim, Provoost, Sam, Pușcaș, Mihai, Pustková, Štěpánka, Randin, Christophe François, Rašomavičius, Valerijus, Reczyńska, Kamila, Rédei, Tamás, Řehounková, Klára, Richner, Nina, Risch, Anita C., Rixen, Christian, Rosbakh, Sergey, Roscher, Christiane, Rosenthal, Gert, Rossi, Graziano, Rötzer, Harald, Roux, Camille, Rumpf, Sabine B., Ruprecht, Eszter, Rūsiņa, Solvita, Sanz-Zubizarreta, Irati, Schindler, Meret, Schmidt, Wolfgang, Schories, Dirk, Schrautzer, Joachim, Schubert, Hendrik, Schuetz, Martin, Schwabe, Angelika, Schwaiger, Helena, Schwartze, Peter, Šebesta, Jan, Seiler, Hallie, Šilc, Urban, Silva, Vasco, Šmilauer, Petr, Šmilauerová, Marie, Sperle, Thomas, Stachurska-Swakoń, Alina, Stanik, Nils, Stanisci, Angela, Steffen, Kristina, Storm, Christian, Stroh, Hans Georg, Sugorkina, Nadezhda, Świerkosz, Krzysztof, Świerszcz, Sebastian, Szymura, Magdalena, Teleki, Balázs, Thébaud, Gilles, Theurillat, Jean Paul, Tichý, Lubomír, Treier, Urs A., Turtureanu, Pavel Dan, Ujházy, Karol, Ujházyová, Mariana, Ursu, Tudor Mihai, Uziębło, Aldona K., Valkó, Orsolya, Van Calster, Hans, Van Meerbeek, Koenraad, Vandevoorde, Bart, Vandvik, Vigdis, Varricchione, Marco, Vassilev, Kiril, Villar, Luis, Virtanen, Risto, Vittoz, Pascal, Voigt, Winfried, von Hessberg, Andreas, von Oheimb, Goddert, Wagner, Eva, Walther, Gian Reto, Wellstein, Camilla, Wesche, Karsten, Wilhelm, Markus, Willner, Wolfgang, Wipf, Sonja, Wittig, Burghard, Wohlgemuth, Thomas, Woodcock, Ben A., Wulf, Monika, and Essl, Franz

Abstract

Aims: We introduce ReSurveyEurope — a new data source of resurveyed vegetation plots in Europe, compiled by a collaborative network of vegetation scientists. We describe the scope of this initiative, provide an overview of currently available data, governance, data contribution rules, and accessibility. In addition, we outline further steps, including potential research questions. Results: ReSurveyEurope includes resurveyed vegetation plots from all habitats. Version 1.0 of ReSurveyEurope contains 283,135 observations (i.e., individual surveys of each plot) from 79,190 plots sampled in 449 independent resurvey projects. Of these, 62,139 (78%) are permanent plots, that is, marked in situ, or located with GPS, which allow for high spatial accuracy in resurvey. The remaining 17,051 (22%) plots are from studies in which plots from the initial survey could not be exactly relocated. Four data sets, which together account for 28,470 (36%) plots, provide only presence/absence information on plant species, while the remaining 50,720 (64%) plots contain abundance information (e.g., percentage cover or cover–abundance classes such as variants of the Braun-Blanquet scale). The oldest plots were sampled in 1911 in the Swiss Alps, while most plots were sampled between 1950 and 2020. Conclusions: ReSurveyEurope is a new resource to address a wide range of research questions on fine-scale changes in European vegetation. The initiative is devoted to an inclusive and transparent governance and data usage approach, based on slightly adapted rules of the well-established European Vegetation Archive (EVA). ReSurveyEurope data are ready for use, and proposals for analyses of the data set can be submitted at any time to the coordinators. Still, further data contributions are highly welcome.

Published
2024

41. CHANGES WORTH MAKING

Author

Berg, Christian

Subjects
Bowhunting, Bow and arrow, Sports and fitness, Travel, recreation and leisure
Abstract

MOST LONGTIME bowhunters have owned their fair share of bows, and just about everyone has a few all-time favorites. Thinking back over my nearly three decades in archery, a handful [...]

Published
2024

42. WHAT IS THE BEST style of release aid for bowhunting?

Author

Berg, Christian

Subjects
Bowhunting, Sports and fitness, Travel, recreation and leisure, Instagram (Online service)
Abstract

To help bowhunters gain a better understanding of the various release-aid options, we posed the following question on our Facebook and Instagram pages. Here, we share one of the best [...]

Published
2024

43. KENETREK HARDSCRABBLE HIKER: THESE BOOTS WERE MADE FOR HUNTING

Author

Berg, Christian

Subjects
Hiking, Footwear, Hunting, Sports and fitness, Travel, recreation and leisure
Abstract

IT'S OFTEN SAID that the two most important pieces of backcountry bowhunting equipment are good glass and good boots. Without quality optics, your odds of locating game are greatly diminished. [...]

Published
2024

44. Symmetric moment problems and a conjecture of Valent

Author

Berg, Christian and Szwarc, Ryszard

Subjects
Mathematics - Classical Analysis and ODEs, 44A60, 11M32, 30D15, 60J80
Abstract

In 1998 G. Valent made conjectures about the order and type of certain indeterminate Stieltjes moment problems associated with birth and death processes having polynomial birth and death rates of degree p\ge 3. Romanov recently proved that the order is 1/p as conjectured, see \cite{Ro}. We prove that the type with respect to the order is related to certain multi-zeta values and that this type belongs to the interval [\pi/(p\sin(\pi/p)),\pi/(p\sin(\pi/p)\cos(\pi/p))], which also contains the conjectured value. This proves that the conjecture about type is asymptotically correct as p\to\infty. The main idea is to obtain estimates for order and type of symmetric indeterminate Hamburger moment problems when the orthonormal polynomials P_n and those of the second kind Q_n satisfy P_{2n}^2(0)\sim c_1n^{-1/\b} and Q_{2n-1}^2(0)\sim c_2 n^{-1/\a}, where 0<\a,\b<1 can be different, and c_1,c_2 are positive constants. In this case the order of the moment problem is majorized by the harmonic mean of \a,\b. Here \alpha_n\sim \beta_n means that \alpha_n/\beta_n\to 1. This also leads to a new proof of Romanov's Theorem that the order is 1/p., Comment: 27 pages. Revised version after referee report. The material is now rearranged in 6 sections. New references added

Published
2015

45. From Schoenberg coefficients to Schoenberg functions

Author

Berg, Christian and Porcu, Emilio

Subjects
Mathematics - Classical Analysis and ODEs, Primary 43A35, secondary 33C55
Abstract

In his seminal paper, Schoenberg (1942) characterized the class P(S^d) of continuous functions f:[-1,1] \to \R such that f(\cos \theta) is positive definite over the product space S^d \times S^d, with S^d being the unit sphere of \R^{d+1} and \theta being the great circle distance. In this paper, we consider the product space S^d \times G, for G a locally compact group, and define the class P(S^d, G) of continuous functions f:[-1,1]\times G \to \C such that f(\cos \theta, u^{-1}\cdot v) is positive definite on S^d \times S^d \times G \times G. This offers a natural extension of Schoenberg's Theorem. Schoenberg's second theorem corresponding to the Hilbert sphere S^\infty is also extended to this context. The case G=\R is of special importance for probability theory and stochastic processes, because it characterizes completely the class of space-time covariance functions where the space is the sphere, being an approximation of Planet Earth., Comment: 26 pages

Published
2015

47. Stable Word-Clouds for Visualising Text-Changes Over Time

Author

Herold, Elisa, Pöckelmann, Marcus, Berg, Christian, Ritter, Jörg, Hall, Mark M., Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Doucet, Antoine, editor, Isaac, Antoine, editor, Golub, Koraljka, editor, Aalberg, Trond, editor, and Jatowt, Adam, editor

Published
2019
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50. ReSurveyEurope: A database of resurveyed vegetation plots in Europe

Author

Knollová, Ilona, primary, Chytrý, Milan, additional, Bruelheide, Helge, additional, Dullinger, Stefan, additional, Jandt, Ute, additional, Bernhardt‐Römermann, Markus, additional, Biurrun, Idoia, additional, de Bello, Francesco, additional, Glaser, Michael, additional, Hennekens, Stephan, additional, Jansen, Florian, additional, Jiménez‐Alfaro, Borja, additional, Kadaš, Daniel, additional, Kaplan, Ekin, additional, Klinkovská, Klára, additional, Lenzner, Bernd, additional, Pauli, Harald, additional, Sperandii, Marta Gaia, additional, Verheyen, Kris, additional, Winkler, Manuela, additional, Abdaladze, Otar, additional, Aćić, Svetlana, additional, Acosta, Alicia T. R., additional, Alignier, Audrey, additional, Andrews, Christopher, additional, Arlettaz, Raphaël, additional, Attorre, Fabio, additional, Axmanová, Irena, additional, Babbi, Manuel, additional, Baeten, Lander, additional, Baran, Jakub, additional, Barni, Elena, additional, Benito‐Alonso, José‐Luis, additional, Berg, Christian, additional, Bergamini, Ariel, additional, Berki, Imre, additional, Boch, Steffen, additional, Bock, Barbara, additional, Bode, Frank, additional, Bonari, Gianmaria, additional, Boublík, Karel, additional, Britton, Andrea J., additional, Brunet, Jörg, additional, Bruzzaniti, Vanessa, additional, Buholzer, Serge, additional, Burrascano, Sabina, additional, Campos, Juan A., additional, Carlsson, Bengt‐Göran, additional, Carranza, Maria Laura, additional, Černý, Tomáš, additional, Charmillot, Kévin, additional, Chiarucci, Alessandro, additional, Choler, Philippe, additional, Chytrý, Kryštof, additional, Corcket, Emmanuel, additional, Csecserits, Anikó, additional, Cutini, Maurizio, additional, Czarniecka‐Wiera, Marta, additional, Danihelka, Jiří, additional, de Francesco, Maria Carla, additional, De Frenne, Pieter, additional, Di Musciano, Michele, additional, De Sanctis, Michele, additional, Deák, Balázs, additional, Decocq, Guillaume, additional, Dembicz, Iwona, additional, Dengler, Jürgen, additional, Di Cecco, Valter, additional, Dick, Jan, additional, Diekmann, Martin, additional, Dierschke, Hartmut, additional, Dirnböck, Thomas, additional, Doerfler, Inken, additional, Doležal, Jiří, additional, Döring, Ute, additional, Durak, Tomasz, additional, Dwyer, Ciara, additional, Ejrnæs, Rasmus, additional, Ermakova, Inna, additional, Erschbamer, Brigitta, additional, Fanelli, Giuliano, additional, Fernández‐Calzado, María‐Rosa, additional, Fickert, Thomas, additional, Fischer, Andrea, additional, Fischer, Markus, additional, Foremnik, Kacper, additional, Frouz, Jan, additional, García‐González, Ricardo, additional, García‐Magro, Daniel, additional, García‐Mijangos, Itziar, additional, Gavilán, Rosario G., additional, Germ, Mateja, additional, Ghosn, Dany, additional, Gigauri, Khatuna, additional, Gizela, Jaroslav, additional, Golob, Aleksandra, additional, Golub, Valentin, additional, Gómez‐García, Daniel, additional, Gowing, David, additional, Grytnes, John‐Arvid, additional, Güler, Behlül, additional, Gutiérrez‐Girón, Alba, additional, Haase, Peter, additional, Haider, Sylvia, additional, Hájek, Michal, additional, Halassy, Melinda, additional, Harásek, Martin, additional, Härdtle, Werner, additional, Heinken, Thilo, additional, Hester, Alison, additional, Humbert, Jean‐Yves, additional, Ibáñez, Ricardo, additional, Illa, Estela, additional, Jaroszewicz, Bogdan, additional, Jensen, Kai, additional, Jentsch, Anke, additional, Jiroušek, Martin, additional, Kalníková, Veronika, additional, Kanka, Róbert, additional, Kapfer, Jutta, additional, Kazakis, George, additional, Kermavnar, Janez, additional, Kesting, Stefan, additional, Khanina, Larisa, additional, Kindermann, Elisabeth, additional, Kotrík, Marek, additional, Koutecký, Tomáš, additional, Kozub, Łukasz, additional, Kuhn, Gisbert, additional, Kutnar, Lado, additional, La Montagna, Dario, additional, Lamprecht, Andrea, additional, Lenoir, Jonathan, additional, Lepš, Jan, additional, Leuschner, Christoph, additional, Lorite, Juan, additional, Madsen, Bjarke, additional, Ugarte, Rosina Magaña, additional, Malicki, Marek, additional, Maliniemi, Tuija, additional, Máliš, František, additional, Maringer, Alexander, additional, Marrs, Robert, additional, Matesanz, Silvia, additional, Metze, Katrin, additional, Meyer, Stefan, additional, Millett, Jonathan, additional, Mitchell, Ruth J., additional, Moeslund, Jesper Erenskjold, additional, Moiseev, Pavel, additional, di Cella, Umberto Morra, additional, Mudrák, Ondřej, additional, Müller, Frank, additional, Müller, Norbert, additional, Naaf, Tobias, additional, Nagy, Laszlo, additional, Napoleone, Francesca, additional, Nascimbene, Juri, additional, Navrátilová, Jana, additional, Ninot, Josep M., additional, Niu, Yujie, additional, Normand, Signe, additional, Ogaya, Romá, additional, Onipchenko, Vladimir, additional, Orczewska, Anna, additional, Ortmann‐Ajkai, Adrienne, additional, Pakeman, Robin J., additional, Pardo, Iker, additional, Pätsch, Ricarda, additional, Peet, Robert K., additional, Penuelas, Josep, additional, Peppler‐Lisbach, Cord, additional, Pérez‐Hernández, Javier, additional, Pérez‐Haase, Aaron, additional, Petraglia, Alessandro, additional, Petřík, Petr, additional, Pielech, Remigiusz, additional, Piórkowski, Hubert, additional, Pladevall‐Izard, Eulàlia, additional, Poschlod, Peter, additional, Prach, Karel, additional, Praleskouskaya, Safiya, additional, Prokhorov, Vadim, additional, Provoost, Sam, additional, Pușcaș, Mihai, additional, Pustková, Štěpánka, additional, Randin, Christophe François, additional, Rašomavičius, Valerijus, additional, Reczyńska, Kamila, additional, Rédei, Tamás, additional, Řehounková, Klára, additional, Richner, Nina, additional, Risch, Anita C., additional, Rixen, Christian, additional, Rosbakh, Sergey, additional, Roscher, Christiane, additional, Rosenthal, Gert, additional, Rossi, Graziano, additional, Rötzer, Harald, additional, Roux, Camille, additional, Rumpf, Sabine B., additional, Ruprecht, Eszter, additional, Rūsiņa, Solvita, additional, Sanz‐Zubizarreta, Irati, additional, Schindler, Meret, additional, Schmidt, Wolfgang, additional, Schories, Dirk, additional, Schrautzer, Joachim, additional, Schubert, Hendrik, additional, Schuetz, Martin, additional, Schwabe, Angelika, additional, Schwaiger, Helena, additional, Schwartze, Peter, additional, Šebesta, Jan, additional, Seiler, Hallie, additional, Šilc, Urban, additional, Silva, Vasco, additional, Šmilauer, Petr, additional, Šmilauerová, Marie, additional, Sperle, Thomas, additional, Stachurska‐Swakoń, Alina, additional, Stanik, Nils, additional, Stanisci, Angela, additional, Steffen, Kristina, additional, Storm, Christian, additional, Stroh, Hans Georg, additional, Sugorkina, Nadezhda, additional, Świerkosz, Krzysztof, additional, Świerszcz, Sebastian, additional, Szymura, Magdalena, additional, Teleki, Balázs, additional, Thébaud, Gilles, additional, Theurillat, Jean‐Paul, additional, Tichý, Lubomír, additional, Treier, Urs A., additional, Turtureanu, Pavel Dan, additional, Ujházy, Karol, additional, Ujházyová, Mariana, additional, Ursu, Tudor Mihai, additional, Uziębło, Aldona K., additional, Valkó, Orsolya, additional, Van Calster, Hans, additional, Van Meerbeek, Koenraad, additional, Vandevoorde, Bart, additional, Vandvik, Vigdis, additional, Varricchione, Marco, additional, Vassilev, Kiril, additional, Villar, Luis, additional, Virtanen, Risto, additional, Vittoz, Pascal, additional, Voigt, Winfried, additional, von Hessberg, Andreas, additional, von Oheimb, Goddert, additional, Wagner, Eva, additional, Walther, Gian‐Reto, additional, Wellstein, Camilla, additional, Wesche, Karsten, additional, Wilhelm, Markus, additional, Willner, Wolfgang, additional, Wipf, Sonja, additional, Wittig, Burghard, additional, Wohlgemuth, Thomas, additional, Woodcock, Ben A., additional, Wulf, Monika, additional, and Essl, Franz, additional

Published
2024
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