Montane rainforest dynamics under changes in climate and human impact during the past millennia in northern Madagascar.

Autor:	Montade V; ISEM, University of Montpellier, CNRS, IRD, EPHE, PSL Research University, Montpellier, France.; Department of Palynology and Climate Dynamics, Albrecht-von-Haller-Institute for Plant Sciences, University of Goettingen, Göttingen, Germany., Bremond L; ISEM, University of Montpellier, CNRS, IRD, EPHE, PSL Research University, Montpellier, France., Teixeira H; UMR ENTROPIE, University of La Réunion, IRD, CNRS, IFREMER, Université de Nouvelle-Calédonie, Ile de La Réunion, France.; Institute of Zoology, University of Veterinary Medicine Hannover, Bünteweg 17, 30559 Hannover, Germany., Kasper T; Physical Geography, Institute for Geography and Geology, University of Greifswald, Greifswald, Germany., Daut G; Physical Geography, Institute of Geography, Friedrich Schiller University, Jena, Germany., Rouland S; ISEM, University of Montpellier, CNRS, IRD, EPHE, PSL Research University, Montpellier, France., Rasoamanana E; Department of Plant Biology and Ecology, Faculty of Sciences, University of Antananarivo, Antananarivo, Madagascar., Ramavovolona P; Department of Plant Biology and Ecology, Faculty of Sciences, University of Antananarivo, Antananarivo, Madagascar., Favier C; ISEM, University of Montpellier, CNRS, IRD, EPHE, PSL Research University, Montpellier, France., Arnaud F; EDYTEM, Université de Savoie, CNRS Pôle Montagne, 73376 Le Bourget du Lac, France., Radespiel U; Institute of Zoology, University of Veterinary Medicine Hannover, Bünteweg 17, 30559 Hannover, Germany., Behling H; Department of Palynology and Climate Dynamics, Albrecht-von-Haller-Institute for Plant Sciences, University of Goettingen, Göttingen, Germany.
Jazyk:	angličtina
Zdroj:	Royal Society open science [R Soc Open Sci] 2024 Aug 21; Vol. 11 (8), pp. 230930. Date of Electronic Publication: 2024 Aug 21 (Print Publication: 2024).
DOI:	10.1098/rsos.230930
Abstrakt:	Although it is well known that humans substantially altered the Malagasy ecosystems, the timing of the human arrival as well as the extension of their environmental impact is yet not well understood. This research aims to study the influence of early human impact and climate change on rainforests and wildlife in northern Madagascar during the past millennia. Results obtained from the lake sediment in a montane environment showed significant changes in vegetation within the lake catchment associated with a major drought that started approximately 1100 years ago. Human impact, revealed by fires, began at roughly the same time and occurred outside the lake catchment. Although this does not dismiss the impacts that humans had at a regional scale, this result demonstrates that the late Holocene natural drought also significantly impacted the ecosystems independently of anthropogenic activities. At a regional scale, a review of species demographic history revealed a substantial number of population bottlenecks during the last millennia, probably resulting from this combination of human-related impact and natural climate changes. This research highlights the importance of a multi-site and multi-proxy comparison for deciphering the nature and succession of environmental changes. Competing Interests: We declare we have no competing interests. (© 2024 The Author(s).)
Databáze:	MEDLINE
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