Search

Your search keyword '"Jensen T. C."' showing total 8 results
Start Over Author "Jensen T. C." Database OAIster
8 results on '"Jensen T. C."'

1. Time series of freshwater macroinvertebrate abundances and site characteristics of European streams and rivers

Author

Welti, E, Bowler, D, Sinclair, J, Altermatt, F, Alvarez-Cabria, M, Amatulli, G, Angeler, D, Archambaud, G, Arrate Jorrin, I, Aspin, T, Azpiroz, I, Baker, N, Banares, I, Barquin Ortiz, J, Bodin, C, Bonacina, L, Bonada, N, Bottarin, R, Canedo-Arguelles, M, Csabai, Z, Datry, T, de Eyto, E, Dohet, A, Domisch, S, Dorflinger, G, Drohan, E, Eikland, K, England, J, Eriksen, T, Evtimova, V, Feio, M, Ferreol, M, Floury, M, Forcellini, M, Forio, M, Fornaroli, R, Friberg, N, Fruget, J, Garcia Marquez, J, Georgieva, G, Goethals, P, Graca, M, House, A, Huttunen, K, Jensen, T, Johnson, R, Jones, J, Kiesel, J, Larranaga, A, Leitner, P, L'Hoste, L, Lizee, M, Lorenz, A, Maire, A, Manzanos Arnaiz, J, Mckie, B, Millan, A, Muotka, T, Murphy, J, Ozolins, D, Paavola, R, Paril, P, Penas Silva, F, Polasek, M, Rasmussen, J, Rubio, M, Sanchez Fernandez, D, Sandin, L, Schafer, R, Schmidt-Kloiber, A, Scotti, A, Shen, L, Skuja, A, Stoll, S, Straka, M, Stubbington, R, Timm, H, Tyufekchieva, V, Tziortzis, I, Uzunov, Y, van der Lee, G, Vannevel, R, Varadinova, E, Varbiro, G, Velle, G, Verdonschot, P, Verdonschot, R, Vidinova, Y, Wiberg-Larsen, P, Haase, P, Welti E. A. R., Bowler D. E., Sinclair J. S., Altermatt F., Alvarez-Cabria M., Amatulli G., Angeler D. G., Archambaud G., Arrate Jorrin I., Aspin T., Azpiroz I., Baker N. J., Banares I., Barquin Ortiz J., Bodin C. L., Bonacina L., Bonada N., Bottarin R., Canedo-Arguelles M., Csabai Z., Datry T., de Eyto E., Dohet A., Domisch S., Dorflinger G., Drohan E., Eikland K. A., England J., Eriksen T. E., Evtimova V., Feio M. J., Ferreol M., Floury M., Forcellini M., Forio M. A. E., Fornaroli R., Friberg N., Fruget J. -F., Garcia Marquez J. R., Georgieva G., Goethals P., Graca M. A. S., House A., Huttunen K. -L., Jensen T. C., Johnson R. K., Jones J. I., Kiesel J., Larranaga A., Leitner P., L'Hoste L., Lizee M. -H., Lorenz A. W., Maire A., Manzanos Arnaiz J. A., Mckie B., Millan A., Muotka T., Murphy J. F., Ozolins D., Paavola R., Paril P., Penas Silva F. J., Polasek M., Rasmussen J., Rubio M., Sanchez Fernandez D., Sandin L., Schafer R. B., Schmidt-Kloiber A., Scotti A., Shen L. Q., Skuja A., Stoll S., Straka M., Stubbington R., Timm H., Tyufekchieva V. G., Tziortzis I., Uzunov Y., van der Lee G. H., Vannevel R., Varadinova E., Varbiro G., Velle G., Verdonschot P. F. M., Verdonschot R. C. M., Vidinova Y., Wiberg-Larsen P., Haase P., Welti, E, Bowler, D, Sinclair, J, Altermatt, F, Alvarez-Cabria, M, Amatulli, G, Angeler, D, Archambaud, G, Arrate Jorrin, I, Aspin, T, Azpiroz, I, Baker, N, Banares, I, Barquin Ortiz, J, Bodin, C, Bonacina, L, Bonada, N, Bottarin, R, Canedo-Arguelles, M, Csabai, Z, Datry, T, de Eyto, E, Dohet, A, Domisch, S, Dorflinger, G, Drohan, E, Eikland, K, England, J, Eriksen, T, Evtimova, V, Feio, M, Ferreol, M, Floury, M, Forcellini, M, Forio, M, Fornaroli, R, Friberg, N, Fruget, J, Garcia Marquez, J, Georgieva, G, Goethals, P, Graca, M, House, A, Huttunen, K, Jensen, T, Johnson, R, Jones, J, Kiesel, J, Larranaga, A, Leitner, P, L'Hoste, L, Lizee, M, Lorenz, A, Maire, A, Manzanos Arnaiz, J, Mckie, B, Millan, A, Muotka, T, Murphy, J, Ozolins, D, Paavola, R, Paril, P, Penas Silva, F, Polasek, M, Rasmussen, J, Rubio, M, Sanchez Fernandez, D, Sandin, L, Schafer, R, Schmidt-Kloiber, A, Scotti, A, Shen, L, Skuja, A, Stoll, S, Straka, M, Stubbington, R, Timm, H, Tyufekchieva, V, Tziortzis, I, Uzunov, Y, van der Lee, G, Vannevel, R, Varadinova, E, Varbiro, G, Velle, G, Verdonschot, P, Verdonschot, R, Vidinova, Y, Wiberg-Larsen, P, Haase, P, Welti E. A. R., Bowler D. E., Sinclair J. S., Altermatt F., Alvarez-Cabria M., Amatulli G., Angeler D. G., Archambaud G., Arrate Jorrin I., Aspin T., Azpiroz I., Baker N. J., Banares I., Barquin Ortiz J., Bodin C. L., Bonacina L., Bonada N., Bottarin R., Canedo-Arguelles M., Csabai Z., Datry T., de Eyto E., Dohet A., Domisch S., Dorflinger G., Drohan E., Eikland K. A., England J., Eriksen T. E., Evtimova V., Feio M. J., Ferreol M., Floury M., Forcellini M., Forio M. A. E., Fornaroli R., Friberg N., Fruget J. -F., Garcia Marquez J. R., Georgieva G., Goethals P., Graca M. A. S., House A., Huttunen K. -L., Jensen T. C., Johnson R. K., Jones J. I., Kiesel J., Larranaga A., Leitner P., L'Hoste L., Lizee M. -H., Lorenz A. W., Maire A., Manzanos Arnaiz J. A., Mckie B., Millan A., Muotka T., Murphy J. F., Ozolins D., Paavola R., Paril P., Penas Silva F. J., Polasek M., Rasmussen J., Rubio M., Sanchez Fernandez D., Sandin L., Schafer R. B., Schmidt-Kloiber A., Scotti A., Shen L. Q., Skuja A., Stoll S., Straka M., Stubbington R., Timm H., Tyufekchieva V. G., Tziortzis I., Uzunov Y., van der Lee G. H., Vannevel R., Varadinova E., Varbiro G., Velle G., Verdonschot P. F. M., Verdonschot R. C. M., Vidinova Y., Wiberg-Larsen P., and Haase P.

Abstract

Freshwater macroinvertebrates are a diverse group and play key ecological roles, including accelerating nutrient cycling, filtering water, controlling primary producers, and providing food for predators. Their differences in tolerances and short generation times manifest in rapid community responses to change. Macroinvertebrate community composition is an indicator of water quality. In Europe, efforts to improve water quality following environmental legislation, primarily starting in the 1980s, may have driven a recovery of macroinvertebrate communities. Towards understanding temporal and spatial variation of these organisms, we compiled the TREAM dataset (Time seRies of European freshwAter Macroinvertebrates), consisting of macroinvertebrate community time series from 1,816 river and stream sites (mean length of 19.2 years and 14.9 sampling years) of 22 European countries sampled between 1968 and 2020. In total, the data include >93 million sampled individuals of 2,648 taxa from 959 genera and 212 families. These data can be used to test questions ranging from identifying drivers of the population dynamics of specific taxa to assessing the success of legislative and management restoration efforts.

Published
2024

2. The recovery of European freshwater biodiversity has come to a halt

Author

Haase, P, Bowler, D, Baker, N, Bonada, N, Domisch, S, Garcia Marquez, J, Heino, J, Hering, D, Jahnig, S, Schmidt-Kloiber, A, Stubbington, R, Altermatt, F, Alvarez-Cabria, M, Amatulli, G, Angeler, D, Archambaud-Suard, G, Jorrin, I, Aspin, T, Azpiroz, I, Banares, I, Ortiz, J, Bodin, C, Bonacina, L, Bottarin, R, Canedo-Arguelles, M, Csabai, Z, Datry, T, de Eyto, E, Dohet, A, Dorflinger, G, Drohan, E, Eikland, K, England, J, Eriksen, T, Evtimova, V, Feio, M, Ferreol, M, Floury, M, Forcellini, M, Forio, M, Fornaroli, R, Friberg, N, Fruget, J, Georgieva, G, Goethals, P, Graca, M, Graf, W, House, A, Huttunen, K, Jensen, T, Johnson, R, Jones, J, Kiesel, J, Kuglerova, L, Larranaga, A, Leitner, P, L'Hoste, L, Lizee, M, Lorenz, A, Maire, A, Arnaiz, J, Mckie, B, Millan, A, Monteith, D, Muotka, T, Murphy, J, Ozolins, D, Paavola, R, Paril, P, Penas, F, Pilotto, F, Polasek, M, Rasmussen, J, Rubio, M, Sanchez-Fernandez, D, Sandin, L, Schafer, R, Scotti, A, Shen, L, Skuja, A, Stoll, S, Straka, M, Timm, H, Tyufekchieva, V, Tziortzis, I, Uzunov, Y, van der Lee, G, Vannevel, R, Varadinova, E, Varbiro, G, Velle, G, Verdonschot, P, Verdonschot, R, Vidinova, Y, Wiberg-Larsen, P, Welti, E, Haase P., Bowler D. E., Baker N. J., Bonada N., Domisch S., Garcia Marquez J. R., Heino J., Hering D., Jahnig S. C., Schmidt-Kloiber A., Stubbington R., Altermatt F., Alvarez-Cabria M., Amatulli G., Angeler D. G., Archambaud-Suard G., Jorrin I. A., Aspin T., Azpiroz I., Banares I., Ortiz J. B., Bodin C. L., Bonacina L., Bottarin R., Canedo-Arguelles M., Csabai Z., Datry T., de Eyto E., Dohet A., Dorflinger G., Drohan E., Eikland K. A., England J., Eriksen T. E., Evtimova V., Feio M. J., Ferreol M., Floury M., Forcellini M., Forio M. A. E., Fornaroli R., Friberg N., Fruget J. -F., Georgieva G., Goethals P., Graca M. A. S., Graf W., House A., Huttunen K. -L., Jensen T. C., Johnson R. K., Jones J. I., Kiesel J., Kuglerova L., Larranaga A., Leitner P., L'Hoste L., Lizee M. -H., Lorenz A. W., Maire A., Arnaiz J. A. M., McKie B. G., Millan A., Monteith D., Muotka T., Murphy J. F., Ozolins D., Paavola R., Paril P., Penas F. J., Pilotto F., Polasek M., Rasmussen J. J., Rubio M., Sanchez-Fernandez D., Sandin L., Schafer R. B., Scotti A., Shen L. Q., Skuja A., Stoll S., Straka M., Timm H., Tyufekchieva V. G., Tziortzis I., Uzunov Y., van der Lee G. H., Vannevel R., Varadinova E., Varbiro G., Velle G., Verdonschot P. F. M., Verdonschot R. C. M., Vidinova Y., Wiberg-Larsen P., Welti E. A. R., Haase, P, Bowler, D, Baker, N, Bonada, N, Domisch, S, Garcia Marquez, J, Heino, J, Hering, D, Jahnig, S, Schmidt-Kloiber, A, Stubbington, R, Altermatt, F, Alvarez-Cabria, M, Amatulli, G, Angeler, D, Archambaud-Suard, G, Jorrin, I, Aspin, T, Azpiroz, I, Banares, I, Ortiz, J, Bodin, C, Bonacina, L, Bottarin, R, Canedo-Arguelles, M, Csabai, Z, Datry, T, de Eyto, E, Dohet, A, Dorflinger, G, Drohan, E, Eikland, K, England, J, Eriksen, T, Evtimova, V, Feio, M, Ferreol, M, Floury, M, Forcellini, M, Forio, M, Fornaroli, R, Friberg, N, Fruget, J, Georgieva, G, Goethals, P, Graca, M, Graf, W, House, A, Huttunen, K, Jensen, T, Johnson, R, Jones, J, Kiesel, J, Kuglerova, L, Larranaga, A, Leitner, P, L'Hoste, L, Lizee, M, Lorenz, A, Maire, A, Arnaiz, J, Mckie, B, Millan, A, Monteith, D, Muotka, T, Murphy, J, Ozolins, D, Paavola, R, Paril, P, Penas, F, Pilotto, F, Polasek, M, Rasmussen, J, Rubio, M, Sanchez-Fernandez, D, Sandin, L, Schafer, R, Scotti, A, Shen, L, Skuja, A, Stoll, S, Straka, M, Timm, H, Tyufekchieva, V, Tziortzis, I, Uzunov, Y, van der Lee, G, Vannevel, R, Varadinova, E, Varbiro, G, Velle, G, Verdonschot, P, Verdonschot, R, Vidinova, Y, Wiberg-Larsen, P, Welti, E, Haase P., Bowler D. E., Baker N. J., Bonada N., Domisch S., Garcia Marquez J. R., Heino J., Hering D., Jahnig S. C., Schmidt-Kloiber A., Stubbington R., Altermatt F., Alvarez-Cabria M., Amatulli G., Angeler D. G., Archambaud-Suard G., Jorrin I. A., Aspin T., Azpiroz I., Banares I., Ortiz J. B., Bodin C. L., Bonacina L., Bottarin R., Canedo-Arguelles M., Csabai Z., Datry T., de Eyto E., Dohet A., Dorflinger G., Drohan E., Eikland K. A., England J., Eriksen T. E., Evtimova V., Feio M. J., Ferreol M., Floury M., Forcellini M., Forio M. A. E., Fornaroli R., Friberg N., Fruget J. -F., Georgieva G., Goethals P., Graca M. A. S., Graf W., House A., Huttunen K. -L., Jensen T. C., Johnson R. K., Jones J. I., Kiesel J., Kuglerova L., Larranaga A., Leitner P., L'Hoste L., Lizee M. -H., Lorenz A. W., Maire A., Arnaiz J. A. M., McKie B. G., Millan A., Monteith D., Muotka T., Murphy J. F., Ozolins D., Paavola R., Paril P., Penas F. J., Pilotto F., Polasek M., Rasmussen J. J., Rubio M., Sanchez-Fernandez D., Sandin L., Schafer R. B., Scotti A., Shen L. Q., Skuja A., Stoll S., Straka M., Timm H., Tyufekchieva V. G., Tziortzis I., Uzunov Y., van der Lee G. H., Vannevel R., Varadinova E., Varbiro G., Velle G., Verdonschot P. F. M., Verdonschot R. C. M., Vidinova Y., Wiberg-Larsen P., and Welti E. A. R.

Abstract

Owing to a long history of anthropogenic pressures, freshwater ecosystems are among the most vulnerable to biodiversity loss 1. Mitigation measures, including wastewater treatment and hydromorphological restoration, have aimed to improve environmental quality and foster the recovery of freshwater biodiversity 2. Here, using 1,816 time series of freshwater invertebrate communities collected across 22 European countries between 1968 and 2020, we quantified temporal trends in taxonomic and functional diversity and their responses to environmental pressures and gradients. We observed overall increases in taxon richness (0.73% per year), functional richness (2.4% per year) and abundance (1.17% per year). However, these increases primarily occurred before the 2010s, and have since plateaued. Freshwater communities downstream of dams, urban areas and cropland were less likely to experience recovery. Communities at sites with faster rates of warming had fewer gains in taxon richness, functional richness and abundance. Although biodiversity gains in the 1990s and 2000s probably reflect the effectiveness of water-quality improvements and restoration projects, the decelerating trajectory in the 2010s suggests that the current measures offer diminishing returns. Given new and persistent pressures on freshwater ecosystems, including emerging pollutants, climate change and the spread of invasive species, we call for additional mitigation to revive the recovery of freshwater biodiversity.

Published
2023

3. Five decades of terrestrial and freshwater research at Ny-Ålesund, Svalbard

Author

Pedersen, Å. Ø., Convey, P., Newsham, K. K., Mosbacher, J. B., Fuglei, E., Ravolainen, V., Hansen, B. B., Jensen, T. C., Augusti, A., Biersma, E. M., Cooper, E. J., Coulson, S. J., Gabrielsen, G. W., Gallet, J. C., Karsten, U., Kristiansen, S. M., Svenning, M. M., Tveit, A. T., Uchida, M., Baneschi, I., Calizza, E., Cannone, N., de Goede, E. M., Doveri, M., Elster, J., Giamberini, M. S., Hayashi, K., Lang, S. I., Lee, Y. K., Nakatsubo, T., Pasquali, V., Paulsen, I. M.G., Pedersen, C., Peng, F., Provenzale, A., Pushkareva, E., Sandström, C. A.M., Sklet, V., Stach, A., Tojo, M., Tytgat, B., Tømmervik, H., Velazquez, D., Verleyen, E., Welker, J. M., Yao, Y.-F., Loonen, M. J. J. E., Pedersen, Å. Ø., Convey, P., Newsham, K. K., Mosbacher, J. B., Fuglei, E., Ravolainen, V., Hansen, B. B., Jensen, T. C., Augusti, A., Biersma, E. M., Cooper, E. J., Coulson, S. J., Gabrielsen, G. W., Gallet, J. C., Karsten, U., Kristiansen, S. M., Svenning, M. M., Tveit, A. T., Uchida, M., Baneschi, I., Calizza, E., Cannone, N., de Goede, E. M., Doveri, M., Elster, J., Giamberini, M. S., Hayashi, K., Lang, S. I., Lee, Y. K., Nakatsubo, T., Pasquali, V., Paulsen, I. M.G., Pedersen, C., Peng, F., Provenzale, A., Pushkareva, E., Sandström, C. A.M., Sklet, V., Stach, A., Tojo, M., Tytgat, B., Tømmervik, H., Velazquez, D., Verleyen, E., Welker, J. M., Yao, Y.-F., and Loonen, M. J. J. E.

Abstract

For more than five decades, research has been conducted at Ny-Ålesund, in Svalbard, Norway, to understand the structure and functioning of High-Arctic ecosystems and the profound impacts on them of environmental change. Terrestrial, freshwater, glacial and marine ecosystems are accessible year-round.

Published
2022

4. Five decades of terrestrial and freshwater research at Ny-Ålesund, Svalbard

Author

Pedersen, Å. Ø., Convey, P., Newsham, K. K., Mosbacher, J. B., Fuglei, E., Ravolainen, V., Hansen, B. B., Jensen, T. C., Augusti, A., Biersma, E. M., Cooper, E. J., Coulson, S. J., Gabrielsen, G. W., Gallet, J. C., Karsten, U., Kristiansen, S. M., Svenning, M. M., Tveit, A. T., Uchida, M., Baneschi, I., Calizza, E., Cannone, N., de Goede, E. M., Doveri, M., Elster, J., Giamberini, M. S., Hayashi, K., Lang, S. I., Lee, Y. K., Nakatsubo, T., Pasquali, V., Paulsen, I. M.G., Pedersen, C., Peng, F., Provenzale, A., Pushkareva, E., Sandström, C. A.M., Sklet, V., Stach, A., Tojo, M., Tytgat, B., Tømmervik, H., Velazquez, D., Verleyen, E., Welker, J. M., Yao, Y.-F., Loonen, M. J. J. E., Pedersen, Å. Ø., Convey, P., Newsham, K. K., Mosbacher, J. B., Fuglei, E., Ravolainen, V., Hansen, B. B., Jensen, T. C., Augusti, A., Biersma, E. M., Cooper, E. J., Coulson, S. J., Gabrielsen, G. W., Gallet, J. C., Karsten, U., Kristiansen, S. M., Svenning, M. M., Tveit, A. T., Uchida, M., Baneschi, I., Calizza, E., Cannone, N., de Goede, E. M., Doveri, M., Elster, J., Giamberini, M. S., Hayashi, K., Lang, S. I., Lee, Y. K., Nakatsubo, T., Pasquali, V., Paulsen, I. M.G., Pedersen, C., Peng, F., Provenzale, A., Pushkareva, E., Sandström, C. A.M., Sklet, V., Stach, A., Tojo, M., Tytgat, B., Tømmervik, H., Velazquez, D., Verleyen, E., Welker, J. M., Yao, Y.-F., and Loonen, M. J. J. E.

Abstract

For more than five decades, research has been conducted at Ny-Ålesund, in Svalbard, Norway, to understand the structure and functioning of High-Arctic ecosystems and the profound impacts on them of environmental change. Terrestrial, freshwater, glacial and marine ecosystems are accessible year-round.

Published
2022

5. Meta-analysis of multidecadal biodiversity trends in Europe

Author

Pilotto, F. (Francesca), Kuehn, I. (Ingolf), Adrian, R. (Rita), Alber, R. (Renate), Alignier, A. (Audrey), Andrews, C. (Christopher), Baeck, J. (Jaana), Barbaro, L. (Luc), Beaumont, D. (Deborah), Beenaerts, N. (Natalie), Benham, S. (Sue), Boukal, D. S. (David S.), Bretagnolle, V. (Vincent), Camatti, E. (Elisa), Canullo, R. (Roberto), Cardoso, P. G. (Patricia G.), Ens, B. J. (Bruno J.), Everaert, G. (Gert), Evtimova, V. (Vesela), Feuchtmayr, H. (Heidrun), Garcia-Gonzalez, R. (Ricardo), Gomez Garcia, D. (Daniel), Grandin, U. (Ulf), Gutowski, J. M. (Jerzy M.), Hadar, L. (Liat), Halada, L. (Lubos), Halassy, M. (Melinda), Hummel, H. (Herman), Huttunen, K.-L. (Kaisa-Leena), Jaroszewicz, B. (Bogdan), Jensen, T. C. (Thomas C.), Kalivoda, H. (Henrik), Schmidt, I. K. (Inger Kappel), Kroencke, I. (Ingrid), Leinonen, R. (Reima), Martinho, F. (Filipe), Meesenburg, H. (Henning), Meyer, J. (Julia), Minerbi, S. (Stefano), Monteith, D. (Don), Nikolov, B. P. (Boris P.), Oro, D. (Daniel), Ozolins, D. (Davis), Padedda, B. M. (Bachisio M.), Pallett, D. (Denise), Pansera, M. (Marco), Pardal, M. A. (Miguel Angelo), Petriccione, B. (Bruno), Pipan, T. (Tanja), Poeyry, J. (Juha), Schaefer, S. M. (Stefanie M.), Schaub, M. (Marcus), Schneider, S. C. (Susanne C.), Skuja, A. (Agnija), Soetaert, K. (Karline), Springe, G. (Gunta), Stanchev, R. (Radoslav), Stockan, J. A. (Jenni A.), Stoll, S. (Stefan), Sundqvist, L. (Lisa), Thimonier, A. (Anne), Van Hoey, G. (Gert), Van Ryckegem, G. (Gunther), Visser, M. E. (Marcel E.), Vorhauser, S. (Samuel), Haase, P. (Peter), Pilotto, F. (Francesca), Kuehn, I. (Ingolf), Adrian, R. (Rita), Alber, R. (Renate), Alignier, A. (Audrey), Andrews, C. (Christopher), Baeck, J. (Jaana), Barbaro, L. (Luc), Beaumont, D. (Deborah), Beenaerts, N. (Natalie), Benham, S. (Sue), Boukal, D. S. (David S.), Bretagnolle, V. (Vincent), Camatti, E. (Elisa), Canullo, R. (Roberto), Cardoso, P. G. (Patricia G.), Ens, B. J. (Bruno J.), Everaert, G. (Gert), Evtimova, V. (Vesela), Feuchtmayr, H. (Heidrun), Garcia-Gonzalez, R. (Ricardo), Gomez Garcia, D. (Daniel), Grandin, U. (Ulf), Gutowski, J. M. (Jerzy M.), Hadar, L. (Liat), Halada, L. (Lubos), Halassy, M. (Melinda), Hummel, H. (Herman), Huttunen, K.-L. (Kaisa-Leena), Jaroszewicz, B. (Bogdan), Jensen, T. C. (Thomas C.), Kalivoda, H. (Henrik), Schmidt, I. K. (Inger Kappel), Kroencke, I. (Ingrid), Leinonen, R. (Reima), Martinho, F. (Filipe), Meesenburg, H. (Henning), Meyer, J. (Julia), Minerbi, S. (Stefano), Monteith, D. (Don), Nikolov, B. P. (Boris P.), Oro, D. (Daniel), Ozolins, D. (Davis), Padedda, B. M. (Bachisio M.), Pallett, D. (Denise), Pansera, M. (Marco), Pardal, M. A. (Miguel Angelo), Petriccione, B. (Bruno), Pipan, T. (Tanja), Poeyry, J. (Juha), Schaefer, S. M. (Stefanie M.), Schaub, M. (Marcus), Schneider, S. C. (Susanne C.), Skuja, A. (Agnija), Soetaert, K. (Karline), Springe, G. (Gunta), Stanchev, R. (Radoslav), Stockan, J. A. (Jenni A.), Stoll, S. (Stefan), Sundqvist, L. (Lisa), Thimonier, A. (Anne), Van Hoey, G. (Gert), Van Ryckegem, G. (Gunther), Visser, M. E. (Marcel E.), Vorhauser, S. (Samuel), and Haase, P. (Peter)

Abstract

Local biodiversity trends over time are likely to be decoupled from global trends, as local processes may compensate or counteract global change. We analyze 161 long-term biological time series (15–91 years) collected across Europe, using a comprehensive dataset comprising ~6,200 marine, freshwater and terrestrial taxa. We test whether (i) local long-term biodiversity trends are consistent among biogeoregions, realms and taxonomic groups, and (ii) changes in biodiversity correlate with regional climate and local conditions. Our results reveal that local trends of abundance, richness and diversity differ among biogeoregions, realms and taxonomic groups, demonstrating that biodiversity changes at local scale are often complex and cannot be easily generalized. However, we find increases in richness and abundance with increasing temperature and naturalness as well as a clear spatial pattern in changes in community composition (i.e. temporal taxonomic turnover) in most biogeoregions of Northern and Eastern Europe.

Published
2020

6. Does excess carbon affect respiration of the rotifer Brachionus calyciflorus Pallas?

Author

Jensen, T. C., Anderson, T. R., Daufresne, Martin, Hessen, D. O., Jensen, T. C., Anderson, T. R., Daufresne, Martin, and Hessen, D. O.

Abstract

1. Herbivorous zooplankton maintain a rather constant elemental composition in their body mass as compared with the variability commonly encountered in their food. Furthermore, their high phosphorus (P) and nitrogen (N) content means that they often face an excess of carbon (C) in their diet. Regulation of this surplus of energy may occur via modulation of assimilation efficiency, or postassimilation by increased respiration (CO2) and/or excretion dissolved organic carbon, DOC. Whereas several studies have examined the effect of elemental imbalance in the genus Daphnia, few have examined other zooplankton taxa. 2. We investigated whether the rotifer Brachionus calyciflorus uses increased respiration as a means of stoichiometrically regulating excess dietary C. Growth rate and respiration were measured under different food qualities (C : N and C : P ratios). 3. Both C : N and C : P ratios in food had strong effects on growth rate, demonstrating strong nutrient limitation of rotifer growth when nutrient elements were depleted in the diet and indicating the need for stoichiometric regulation of excess ingested C. 4. Respiration measurements, supported by a stoichiometric model, indicated that excess C was not released as CO2 in B. calyciflorus and that nutrient balance must therefore be maintained by other means such as excretion of DOC or egestion in faecal material.

Published
2006
Full Text
View/download PDF

7. Does excess carbon affect respiration of the rotifer Brachionus calyciflorus Pallas?

Author

Jensen, T. C., Anderson, T. R., Daufresne, Martin, Hessen, D. O., Jensen, T. C., Anderson, T. R., Daufresne, Martin, and Hessen, D. O.

Abstract

1. Herbivorous zooplankton maintain a rather constant elemental composition in their body mass as compared with the variability commonly encountered in their food. Furthermore, their high phosphorus (P) and nitrogen (N) content means that they often face an excess of carbon (C) in their diet. Regulation of this surplus of energy may occur via modulation of assimilation efficiency, or postassimilation by increased respiration (CO2) and/or excretion dissolved organic carbon, DOC. Whereas several studies have examined the effect of elemental imbalance in the genus Daphnia, few have examined other zooplankton taxa. 2. We investigated whether the rotifer Brachionus calyciflorus uses increased respiration as a means of stoichiometrically regulating excess dietary C. Growth rate and respiration were measured under different food qualities (C : N and C : P ratios). 3. Both C : N and C : P ratios in food had strong effects on growth rate, demonstrating strong nutrient limitation of rotifer growth when nutrient elements were depleted in the diet and indicating the need for stoichiometric regulation of excess ingested C. 4. Respiration measurements, supported by a stoichiometric model, indicated that excess C was not released as CO2 in B. calyciflorus and that nutrient balance must therefore be maintained by other means such as excretion of DOC or egestion in faecal material.

Published
2006
Full Text
View/download PDF

8. Does excess carbon affect respiration of the rotifer Brachionus calyciflorus Pallas?

Author

Jensen, T. C., Anderson, T. R., Daufresne, Martin, Hessen, D. O., Jensen, T. C., Anderson, T. R., Daufresne, Martin, and Hessen, D. O.

Abstract

1. Herbivorous zooplankton maintain a rather constant elemental composition in their body mass as compared with the variability commonly encountered in their food. Furthermore, their high phosphorus (P) and nitrogen (N) content means that they often face an excess of carbon (C) in their diet. Regulation of this surplus of energy may occur via modulation of assimilation efficiency, or postassimilation by increased respiration (CO2) and/or excretion dissolved organic carbon, DOC. Whereas several studies have examined the effect of elemental imbalance in the genus Daphnia, few have examined other zooplankton taxa. 2. We investigated whether the rotifer Brachionus calyciflorus uses increased respiration as a means of stoichiometrically regulating excess dietary C. Growth rate and respiration were measured under different food qualities (C : N and C : P ratios). 3. Both C : N and C : P ratios in food had strong effects on growth rate, demonstrating strong nutrient limitation of rotifer growth when nutrient elements were depleted in the diet and indicating the need for stoichiometric regulation of excess ingested C. 4. Respiration measurements, supported by a stoichiometric model, indicated that excess C was not released as CO2 in B. calyciflorus and that nutrient balance must therefore be maintained by other means such as excretion of DOC or egestion in faecal material.

Published
2006
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results