Search

Your search keyword '"Amesbury, Matthew J."' showing total 45 results
Start Over Author "Amesbury, Matthew J."
45 results on '"Amesbury, Matthew J."'

3. Widespread drying of European peatlands in recent centuries

Author

Swindles, Graeme T., Morris, Paul J., Mullan, Donal J., Payne, Richard J., Roland, Thomas P., Amesbury, Matthew J., Lamentowicz, Mariusz, Turner, T. Edward, Gallego-Sala, Angela, Sim, Thomas, Barr, Iestyn D., Blaauw, Maarten, Blundell, Antony, Chambers, Frank M., Charman, Dan J., Feurdean, Angelica, Galloway, Jennifer M., Gałka, Mariusz, Green, Sophie M., Kajukało, Katarzyna, Karofeld, Edgar, Korhola, Atte, Lamentowicz, Łukasz, Langdon, Peter, Marcisz, Katarzyna, Mauquoy, Dmitri, Mazei, Yuri A., McKeown, Michelle M., Mitchell, Edward A. D., Novenko, Elena, Plunkett, Gill, Roe, Helen M., Schoning, Kristian, Sillasoo, Ülle, Tsyganov, Andrey N., van der Linden, Marjolein, Väliranta, Minna, and Warner, Barry

Published
2019
Full Text
View/download PDF

4. Latitudinal limits to the predicted increase of the peatland carbon sink with warming

Author

Gallego-Sala, Angela V., Charman, Dan J., Brewer, Simon, Page, Susan E., Prentice, I. Colin, Friedlingstein, Pierre, Moreton, Steve, Amesbury, Matthew J., Beilman, David W., Björck, Svante, Blyakharchuk, Tatiana, Bochicchio, Christopher, Booth, Robert K., Bunbury, Joan, Camill, Philip, Carless, Donna, Chimner, Rodney A., Clifford, Michael, Cressey, Elizabeth, Courtney-Mustaphi, Colin, De Vleeschouwer, François, de Jong, Rixt, Fialkiewicz-Koziel, Barbara, Finkelstein, Sarah A., Garneau, Michelle, Githumbi, Esther, Hribjlan, John, Holmquist, James, Hughes, Paul D. M., Jones, Chris, Jones, Miriam C., Karofeld, Edgar, Klein, Eric S., Kokfelt, Ulla, Korhola, Atte, Lacourse, Terri, Le Roux, Gael, Lamentowicz, Mariusz, Large, David, Lavoie, Martin, Loisel, Julie, Mackay, Helen, MacDonald, Glen M., Makila, Markku, Magnan, Gabriel, Marchant, Robert, Marcisz, Katarzyna, Martínez Cortizas, Antonio, Massa, Charly, Mathijssen, Paul, Mauquoy, Dmitri, Mighall, Timothy, Mitchell, Fraser J. G., Moss, Patrick, Nichols, Jonathan, Oksanen, Pirita O., Orme, Lisa, Packalen, Maara S., Robinson, Stephen, Roland, Thomas P., Sanderson, Nicole K., Sannel, A. Britta K., Silva-Sánchez, Noemí, Steinberg, Natascha, Swindles, Graeme T., Turner, T. Edward, Uglow, Joanna, Väliranta, Minna, van Bellen, Simon, van der Linden, Marjolein, van Geel, Bas, Wang, Guoping, Yu, Zicheng, Zaragoza-Castells, Joana, and Zhao, Yan

Published
2018
Full Text
View/download PDF

10. Centennial-scale climate change in Ireland during the Holocene

Author

Swindles, Graeme T., Lawson, Ian T., Matthews, Ian P., Blaauw, Maarten, Daley, Timothy J., Charman, Dan J., Roland, Thomas P., Plunkett, Gill, Schettler, Georg, Gearey, Benjamin R., Turner, T. Edward, Rea, Heidi A., Roe, Helen M., Amesbury, Matthew J., Chambers, Frank M., Holmes, Jonathan, Mitchell, Fraser J.G., Blackford, Jeffrey, Blundell, Antony, Branch, Nicholas, Holmes, Jane, Langdon, Peter, McCarroll, Julia, McDermott, Frank, Oksanen, Pirita O., Pritchard, Oliver, Stastney, Phil, Stefanini, Bettina, Young, Dan, Wheeler, Jane, Becker, Katharina, and Armit, Ian

Published
2013
Full Text
View/download PDF

17. Spatially coherent late Holocene Antarctic Peninsula surface air temperature variability

Author

Charman, Dan J., Amesbury, Matthew J, Roland, Thomas P, Royles, Jessica, Hodgson, Dominic A., Convey, Peter, Griffiths, Howard, Faculty of Biological and Environmental Sciences, Environmental Change Research Unit (ECRU), Evans, Jessica [0000-0003-0489-6863], Griffiths, Howard [0000-0002-3009-6563], and Apollo - University of Cambridge Repository

Subjects
ISLAND, 1171 Geosciences, 13 Climate Action, CLIMATE-CHANGE, WEST, OCEAN, sense organs, TRENDS, MOSS BANK
Abstract

The Antarctic Peninsula experienced a rapid rise in regional temperature during the second half of the 20th century, but the regional pattern of multi-centennial temperature changes and their dynamical drivers remain poorly understood. Here we use proxies of biological productivity in rare, deep moss banks to infer past surface air temperature changes on the Antarctic Peninsula and identify the drivers of these changes. Late Holocene temperatures are broadly consistent between the low-elevation moss bank records and a high-elevation ice core site, and we conclude that variation in the strength of the westerlies, linked to the Southern Annular Mode, is the most likely driver. Our data do not support a hypothesized persistent temperature dipole over the Antarctic Peninsula related to a strong influence of El Nino-Southern Oscillation. Rates of change in biological productivity on the peninsula over the 20th century are unusual in the context of the late Holocene, and further warming will drive rapid future increases in moss growth and microbial populations.

Published
2018

18. Peat humification records from Restionaceae bogs in northern New Zealand as potential indicators of Holocene precipitation, seasonality, and ENSO

Author

Newnham, Rewi M., primary, Hazell, Zoë J., additional, Charman, Dan J., additional, Lowe, David J., additional, Rees, Andrew B.H., additional, Amesbury, Matthew J., additional, Roland, Tom P., additional, Gehrels, Maria, additional, van den Bos, Valerie, additional, and Jara, Ignacio A., additional

Published
2019
Full Text
View/download PDF

21. Taxonomic implications of morphological complexity within the testate amoeba genus Corythion from the Antarctic Peninsula

Author

Roland, Thomas P, Amesbury, Matthew J, Wilkinson, David M, Charman, Dan J, Convey, Peter, Hodgson, Dominic A, Royles, Jessica, Clauß, Steffen, Völcker, Eckhard, Evans, Jessica [0000-0003-0489-6863], and Apollo - University of Cambridge Repository

Subjects
taxonomy, Antarctica, palaeoecology, morphospecies, biogeography, testate amoebae
Abstract

Precise and sufficiently detailed morphological taxonomy is vital in biology, for example in the accurate interpretation of ecological and palaeoecological datasets, especially in polar regions, where biodiversity is poor. Testate amoebae on the Antarctic Peninsula (AP) are well-documented and variations in their population size have recently been interpreted as a proxy for microbial productivity changes in response to recent regional climate change. AP testate amoeba assemblages are dominated by a small number of globally ubiquitous taxa. We examine morphological variation in Corythion spp. across the AP, finding clear evidence supporting the presence of two morphospecies. Corythion constricta (Certes 1889) was identified on the AP for the first time and has potentially been previously misidentified. Furthermore, a southerly trend of decreasing average test size in Corythion dubium (Taránek 1881) along the AP suggests adaptive polymorphism, although the precise drivers of this remain unclear, with analysis hindered by limited environmental data. Further work into morphological variation in Corythion is needed elsewhere, alongside molecular analyses, to evaluate the potential for (pseudo)cryptic diversity within the genus. We advocate a parsimonious taxonomical approach that recognises genetic diversity but also examines and develops accurate morphological divisions and descriptions suitable for light microscopy-based ecological and palaeoecological studies.

Published
2017

23. Towards a Holarctic synthesis of peatland testate amoeba ecology: Development of a new continental-scale palaeohydrological transfer function for North America and comparison to European data

Author

Amesbury, Matthew J., primary, Booth, Robert K., additional, Roland, Thomas P., additional, Bunbury, Joan, additional, Clifford, Michael J., additional, Charman, Dan J., additional, Elliot, Suzanne, additional, Finkelstein, Sarah, additional, Garneau, Michelle, additional, Hughes, Paul D.M., additional, Lamarre, Alexandre, additional, Loisel, Julie, additional, Mackay, Helen, additional, Magnan, Gabriel, additional, Markel, Erin R., additional, Mitchell, Edward A.D., additional, Payne, Richard J., additional, Pelletier, Nicolas, additional, Roe, Helen, additional, Sullivan, Maura E., additional, Swindles, Graeme T., additional, Talbot, Julie, additional, van Bellen, Simon, additional, and Warner, Barry G., additional

Published
2018
Full Text
View/download PDF

25. Widespread biological response to recent rapid warming on the Antarctic Peninsula

Author

Amesbury, Matthew J., Roland, Thomas P., Royles, Jessica, Hodgson, Dominic A., Convey, Peter, Griffiths, Howard, and Charman, Dan J.

Abstract

Recent climate change on the Antarctic Peninsula is well documented [1, 2, 3, 4, 5], with warming, alongside increases in precipitation, wind strength, and melt season length [1, 6, 7], driving environmental change [8, 9]. However, meteorological records mostly began in the 1950s, and paleoenvironmental datasets that provide a longer-term context to recent climate change are limited in number and often from single sites [7] and/or discontinuous in time [10 , 11]. Here we use moss bank cores from a 600-km transect from Green Island (65.3°S) to Elephant Island (61.1°S) as paleoclimate archives sensitive to regional temperature change, moderated by water availability and surface microclimate [12, 13]. Mosses grow slowly, but cold temperatures minimize decomposition, facilitating multi-proxy analysis of preserved peat [14]. Carbon isotope discrimination (Δ13C) in cellulose indicates the favorability of conditions for photosynthesis [15]. Testate amoebae are representative heterotrophs in peatlands [16, 17 , 18], so their populations are an indicator of microbial productivity [14]. Moss growth and mass accumulation rates represent the balance between growth and decomposition [19]. Analyzing these proxies in five cores at three sites over 150 years reveals increased biological activity over the past ca. 50 years, in response to climate change. We identified significant changepoints in all sites and proxies, suggesting fundamental and widespread changes in the terrestrial biosphere. The regional sensitivity of moss growth to past temperature rises suggests that terrestrial ecosystems will alter rapidly under future warming, leading to major changes in the biology and landscape of this iconic region—an Antarctic greening to parallel well-established observations in the Arctic [20].

Published
2017

27. Ecosystem state shifts during long‐term development of an Amazonian peatland

Author

Swindles, Graeme T., primary, Morris, Paul J., additional, Whitney, Bronwen, additional, Galloway, Jennifer M., additional, Gałka, Mariusz, additional, Gallego‐Sala, Angela, additional, Macumber, Andrew L., additional, Mullan, Donal, additional, Smith, Mark W., additional, Amesbury, Matthew J., additional, Roland, Thomas P., additional, Sanei, Hamed, additional, Patterson, R. Timothy, additional, Sanderson, Nicole, additional, Parry, Lauren, additional, Charman, Dan J., additional, Lopez, Omar, additional, Valderamma, Elvis, additional, Watson, Elizabeth J., additional, Ivanovic, Ruza F., additional, Valdes, Paul J., additional, Turner, T. Edward, additional, and Lähteenoja, Outi, additional

Published
2017
Full Text
View/download PDF

33. The long-term fate of permafrost peatlands under rapid climate warming

Author

Swindles, Graeme T., primary, Morris, Paul J., additional, Mullan, Donal, additional, Watson, Elizabeth J., additional, Turner, T. Edward, additional, Roland, Thomas P., additional, Amesbury, Matthew J., additional, Kokfelt, Ulla, additional, Schoning, Kristian, additional, Pratte, Steve, additional, Gallego-Sala, Angela, additional, Charman, Dan J., additional, Sanderson, Nicole, additional, Garneau, Michelle, additional, Carrivick, Jonathan L., additional, Woulds, Clare, additional, Holden, Joseph, additional, Parry, Lauren, additional, and Galloway, Jennifer M., additional

Published
2015
Full Text
View/download PDF

34. Ecosystem state shifts during long‐term development of an Amazonian peatland.

Author

Swindles, Graeme T., Morris, Paul J., Whitney, Bronwen, Galloway, Jennifer M., Gałka, Mariusz, Gallego‐Sala, Angela, Macumber, Andrew L., Mullan, Donal, Smith, Mark W., Amesbury, Matthew J., Roland, Thomas P., Sanei, Hamed, Patterson, R. Timothy, Sanderson, Nicole, Parry, Lauren, Charman, Dan J., Lopez, Omar, Valderamma, Elvis, Watson, Elizabeth J., and Ivanovic, Ruza F.

Subjects
PEATLANDS, ECOSYSTEMS, AQUATIC plants, DROUGHTS, SWAMPS, ECOHYDROLOGY
Abstract

Abstract: The most carbon (C)‐dense ecosystems of Amazonia are areas characterized by the presence of peatlands. However, Amazonian peatland ecosystems are poorly understood and are threatened by human activities. Here, we present an investigation into long‐term ecohydrological controls on C accumulation in an Amazonian peat dome. This site is the oldest peatland yet discovered in Amazonia (peat initiation ca. 8.9 ka BP), and developed in three stages: (i) peat initiated in an abandoned river channel with open water and aquatic plants; (ii) inundated forest swamp; and (iii) raised peat dome (since ca. 3.9 ka BP). Local burning occurred at least three times in the past 4,500 years. Two phases of particularly rapid C accumulation (ca. 6.6–6.1 and ca. 4.9–3.9 ka BP), potentially resulting from increased net primary productivity, were seemingly driven by drier conditions associated with widespread drought events. The association of drought phases with major ecosystem state shifts (open water wetland–forest swamp–peat dome) suggests a potential climatic control on the developmental trajectory of this tropical peatland. A third drought phase centred on ca. 1.8–1.1 ka BP led to markedly reduced C accumulation and potentially a hiatus during the peat dome stage. Our results suggest that future droughts may lead to phases of rapid C accumulation in some inundated tropical peat swamps, although this can lead ultimately to a shift to ombrotrophy and a subsequent return to slower C accumulation. Conversely, in ombrotrophic peat domes, droughts may lead to reduced C accumulation or even net loss of peat. Increased surface wetness at our site in recent decades may reflect a shift towards a wetter climate in western Amazonia. Amazonian peatlands represent important carbon stores and habitats, and are important archives of past climatic and ecological information. They should form key foci for conservation efforts. [ABSTRACT FROM AUTHOR]

Published
2018
Full Text
View/download PDF

36. Transatlantic distribution of the Alaskan White River Ash

Author

Jensen, Britta J.L., primary, Pyne-O’Donnell, Sean, additional, Plunkett, Gill, additional, Froese, Duane G., additional, Hughes, Paul D.M., additional, Sigl, Michael, additional, McConnell, Joseph R., additional, Amesbury, Matthew J., additional, Blackwell, Paul G., additional, van den Bogaard, Christel, additional, Buck, Caitlin E., additional, Charman, Dan J., additional, Clague, John J., additional, Hall, Valerie A., additional, Koch, Johannes, additional, Mackay, Helen, additional, Mallon, Gunnar, additional, McColl, Lynsey, additional, and Pilcher, Jonathan R., additional

Published
2014
Full Text
View/download PDF

37. A database and synthesis of northern peatland soil properties and Holocene carbon and nitrogen accumulation

Author

Loisel, Julie, primary, Yu, Zicheng, additional, Beilman, David W, additional, Camill, Philip, additional, Alm, Jukka, additional, Amesbury, Matthew J, additional, Anderson, David, additional, Andersson, Sofia, additional, Bochicchio, Christopher, additional, Barber, Keith, additional, Belyea, Lisa R, additional, Bunbury, Joan, additional, Chambers, Frank M, additional, Charman, Daniel J, additional, De Vleeschouwer, François, additional, Fiałkiewicz-Kozieł, Barbara, additional, Finkelstein, Sarah A, additional, Gałka, Mariusz, additional, Garneau, Michelle, additional, Hammarlund, Dan, additional, Hinchcliffe, William, additional, Holmquist, James, additional, Hughes, Paul, additional, Jones, Miriam C, additional, Klein, Eric S, additional, Kokfelt, Ulla, additional, Korhola, Atte, additional, Kuhry, Peter, additional, Lamarre, Alexandre, additional, Lamentowicz, Mariusz, additional, Large, David, additional, Lavoie, Martin, additional, MacDonald, Glen, additional, Magnan, Gabriel, additional, Mäkilä, Markku, additional, Mallon, Gunnar, additional, Mathijssen, Paul, additional, Mauquoy, Dmitri, additional, McCarroll, Julia, additional, Moore, Tim R, additional, Nichols, Jonathan, additional, O’Reilly, Benjamin, additional, Oksanen, Pirita, additional, Packalen, Maara, additional, Peteet, Dorothy, additional, Richard, Pierre JH, additional, Robinson, Stephen, additional, Ronkainen, Tiina, additional, Rundgren, Mats, additional, Sannel, A Britta K, additional, Tarnocai, Charles, additional, Thom, Tim, additional, Tuittila, Eeva-Stiina, additional, Turetsky, Merritt, additional, Väliranta, Minna, additional, van der Linden, Marjolein, additional, van Geel, Bas, additional, van Bellen, Simon, additional, Vitt, Dale, additional, Zhao, Yan, additional, and Zhou, Weijian, additional

Published
2014
Full Text
View/download PDF

42. Statistical testing of a new testate amoeba-based transfer function for water-table depth reconstruction on ombrotrophic peatlands in north-eastern Canada and Maine, United States.

Author

Amesbury, Matthew J., Mallon, Gunnar, Charman, Dan J., Hughes, Paul D. M., Booth, Robert K., Daley, Timothy J., and Garneau, Michelle

Abstract

Proxy reconstructions of climatic parameters developed using transfer functions are central to the testing of many palaeoclimatic hypotheses on Holocene timescales. However, recent work shows that the mathematical models underpinning many existing transfer functions are susceptible to spatial autocorrelation, clustered training set design and the uneven sampling of environmental gradients. This may result in over-optimistic performance statistics or, in extreme cases, a lack of predictive power. A new testate amoeba-based transfer function is presented that fully incorporates the new recommended statistical tests to address these issues. Leave-one-out cross-validation, the most commonly applied method in recent studies to assess model performance, produced over-optimistic performance statistics for all models tested. However, the preferred model, developed using weighted averaging with tolerance downweighting, retained a predictive capacity equivalent to other published models even when less optimistic performance statistics were chosen. Application of the new statistical tests in the development of transfer functions provides a more thorough assessment of performance and greater confidence in reconstructions based on them. Only when the wider research community have sufficient confidence in transfer function-based proxy reconstructions will they be commonly used in data comparison and palaeoclimate modelling studies of broader scientific relevance. Copyright © 2012 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]

Published
2013
Full Text
View/download PDF

43. The methodological basis for fine-resolution, multi-proxy reconstructions of ombrotrophic peat bog surface wetness.

Author

AMESBURY, MATTHEW J., BARBER, KEITH E., and HUGHES, PAUL D. M.

Subjects
*METHODOLOGY, *PEAT bogs, *PALEOECOLOGY, *CLIMATE change, *HUMIFICATION, *FOSSIL plants
Abstract

Amesbury, M. J., Barber, K. E. & Hughes, P. D. M. 2010: The methodological basis for fine-resolution, multi-proxy reconstructions of ombrotrophic peat bog surface wetness. Boreas, 10.1111/j.1502-3885.2010.00152.x. ISSN 0300-9483. The need for Holocene peat-based palaeoclimatic records of increased temporal resolution has been widely identified in recent research. The often rapid growth rates of ombrotrophic bogs, when combined with fine-resolution (i.e. millimetre-scale) sampling, provide an as yet largely unexploited potential to derive sub-decadal palaeoclimatic data from this proxy-archive. However, multi-proxy, fine-resolution analyses require changes to standard methodologies, and the application of sampling techniques that are new to peat-based palaeoclimate research. A peat sampler was custom-built to allow precise and replicable millimetre-scale subsampling. Subsequent methodological testing revealed that, irrespective of sample thickness (i.e. resolution), halving the standard sample volume used for plant macrofossil (from 4 cm to 2 cm) and testate amoebae (from 2 cm to 1 cm) analyses and the sample weight used for peat humification analysis (from 0.2 g to 0.1 g dried peat) did not affect the interpretation of the results. A contiguous 1-mm sampling resolution for plant macrofossil analysis was also tested, but it was found that contiguous 5-mm samples provided a more reliable background record to fine-resolution testate amoebae and peat humification analyses. Based on these findings, a standardized and systematic methodological approach was developed, using the custom-built peat slicer to take millimetre-scale samples that provide enough sample material for both testate amoebae and peat humification analyses to be performed at 1-mm resolution. This approach will facilitate the testing of the palaeoclimatic reliability of multi-proxy, fine-resolution peat-based records. [ABSTRACT FROM AUTHOR]

Published
2011
Full Text
View/download PDF

44. Latitudinal limits to the predicted increase of the peatland carbon sink with warming

Author

Gallego-Sala, Angela V., Charman, Dan J., Brewer, Simon, Page, Susan E., Prentice, I. Colin, Friedlingstein, Pierre, Moreton, Steve, Amesbury, Matthew J., Beilman, David W., Björck, Svante, Blyakharchuk, Tatiana, Bochicchio, Christopher, Booth, Robert K., Bunbury, Joan, Camill, Philip, Carless, Donna, Chimner, Rodney A., Clifford, Michael, Cressey, Elizabeth, Courtney-Mustaphi, Colin, De Vleeschouwer, François, De Jong, Rixt, Fialkiewicz-Koziel, Barbara, Finkelstein, Sarah A., Garneau, Michelle, Githumbi, Esther, Hribjlan, John, Holmquist, James, Hughes, Paul D. M., Jones, Chris, Jones, Miriam C., Karofeld, Edgar, Klein, Eric S., Kokfelt, Ulla, Korhola, Atte, Lacourse, Terri, Le Roux, Gael, Lamentowicz, Mariusz, Large, David, Lavoie, Martin, Loisel, Julie, Mackay, Helen, MacDonald, Glen M., Makila, Markku, Magnan, Gabriel, Marchant, Robert, Marcisz, Katarzyna, Martínez Cortizas, Antonio, Massa, Charly, Mathijssen, Paul, Mauquoy, Dmitri, Mighall, Timothy, Mitchell, Fraser J. G., Moss, Patrick, Nichols, Jonathan, Oksanen, Pirita O., Orme, Lisa, Packalen, Maara S., Robinson, Stephen, Roland, Thomas P., Sanderson, Nicole K., Sannel, A. Britta K., Silva-Sánchez, Noemí, Steinberg, Natascha, Swindles, Graeme T., Turner, T. Edward, Uglow, Joanna, Väliranta, Minna, Van Bellen, Simon, Van Der Linden, Marjolein, Van Geel, Bas, Wang, Guoping, Yu, Zicheng, Zaragoza-Castells, Joana, and Zhao, Yan

Subjects
13. Climate action, 15. Life on land, 580 Plants (Botany)

45. Moss stable isotopes (carbon-13, oxygen-18) and testate amoebae reflect environmental inputs and microclimate along a latitudinal gradient on the Antarctic Peninsula

Author

Royles, Jessica, Amesbury, Matthew J, Roland, Thomas P, Jones, Glyn D, Convey, Peter, Griffiths, Howard, Hodgson, Dominic A, and Charman, Dan J

Subjects
Carbon Isotopes, Climate Change, Assemblage, Antarctic Regions, Precipitation, Microclimate, Oxygen Isotopes, Carbon, Oxygen, 13. Climate action, Microtopography, 14. Life underwater, Water line, Amoeba
Abstract

The stable isotope compositions of moss tissue water (δ(2)H and δ(18)O) and cellulose (δ(13)C and δ(18)O), and testate amoebae populations were sampled from 61 contemporary surface samples along a 600-km latitudinal gradient of the Antarctic Peninsula (AP) to provide a spatial record of environmental change. The isotopic composition of moss tissue water represented an annually integrated precipitation signal with the expected isotopic depletion with increasing latitude. There was a weak, but significant, relationship between cellulose δ(18)O and latitude, with predicted source water inputs isotopically enriched compared to measured precipitation. Cellulose δ(13)C values were dependent on moss species and water content, and may reflect site exposure to strong winds. Testate amoebae assemblages were characterised by low concentrations and taxonomic diversity, with Corythion dubium and Microcorycia radiata types the most cosmopolitan taxa. The similarity between the intra- and inter-site ranges measured in all proxies suggests that microclimate and micro-topographical conditions around the moss surface were important determinants of proxy values. Isotope and testate amoebae analyses have proven value as palaeoclimatic, temporal proxies of climate change, whereas this study demonstrates that variations in isotopic and amoeboid proxies between microsites can be beyond the bounds of the current spatial variability in AP climate.

Catalog

Books, media, physical & digital resources
See catalog results