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Steep topography buffers threatened gymnosperm species against anthropogenic pressures in China

China is one of the most species‐rich countries in the world, harboring many rare gymnosperms. Following recent human‐led loss of forests, China is now experiencing increases in forest cover resulting from efforts of reforestation schemes. As anthropogenic activities have previously been found to in...

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Autores principales: Jensen, Ditte Arp, Ma, Keping, Svenning, Jens‐Christian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7042744/
https://www.ncbi.nlm.nih.gov/pubmed/32128120
http://dx.doi.org/10.1002/ece3.5983
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author Jensen, Ditte Arp
Ma, Keping
Svenning, Jens‐Christian
author_facet Jensen, Ditte Arp
Ma, Keping
Svenning, Jens‐Christian
author_sort Jensen, Ditte Arp
collection PubMed
description China is one of the most species‐rich countries in the world, harboring many rare gymnosperms. Following recent human‐led loss of forests, China is now experiencing increases in forest cover resulting from efforts of reforestation schemes. As anthropogenic activities have previously been found to interact with topography in shaping forest cover in China and considering the large human population and the ongoing population increase of the country, it is important to understand the role of anthropogenic pressures relative to environmental drivers for shaping species distributions here. Based on the well‐established relationship between human population density and topography, we propose a hypothesis for explaining species distributions in a country dominated by human activities, predicting that species are more likely to occur in areas of steep topography under medium human population densities compared to low and high human population densities. Using species occurrence data from the Chinese Vascular Plant Distribution Database along with a common SDM method (maximum entropy modeling), we tested this hypothesis. Our results show that steep topography has the highest importance for predicting Chinese gymnosperm species occurrences in general, and threatened species specifically, in areas of medium human population densities. Consequently, these species are more often found in areas of steep terrain, supporting the proposed hypothesis. Results from this study highlight the need to include topographically heterogeneous habitats when planning new protected areas for species conservation.
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spelling pubmed-70427442020-03-03 Steep topography buffers threatened gymnosperm species against anthropogenic pressures in China Jensen, Ditte Arp Ma, Keping Svenning, Jens‐Christian Ecol Evol Original Research China is one of the most species‐rich countries in the world, harboring many rare gymnosperms. Following recent human‐led loss of forests, China is now experiencing increases in forest cover resulting from efforts of reforestation schemes. As anthropogenic activities have previously been found to interact with topography in shaping forest cover in China and considering the large human population and the ongoing population increase of the country, it is important to understand the role of anthropogenic pressures relative to environmental drivers for shaping species distributions here. Based on the well‐established relationship between human population density and topography, we propose a hypothesis for explaining species distributions in a country dominated by human activities, predicting that species are more likely to occur in areas of steep topography under medium human population densities compared to low and high human population densities. Using species occurrence data from the Chinese Vascular Plant Distribution Database along with a common SDM method (maximum entropy modeling), we tested this hypothesis. Our results show that steep topography has the highest importance for predicting Chinese gymnosperm species occurrences in general, and threatened species specifically, in areas of medium human population densities. Consequently, these species are more often found in areas of steep terrain, supporting the proposed hypothesis. Results from this study highlight the need to include topographically heterogeneous habitats when planning new protected areas for species conservation. John Wiley and Sons Inc. 2020-02-05 /pmc/articles/PMC7042744/ /pubmed/32128120 http://dx.doi.org/10.1002/ece3.5983 Text en © 2020 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Research
Jensen, Ditte Arp
Ma, Keping
Svenning, Jens‐Christian
Steep topography buffers threatened gymnosperm species against anthropogenic pressures in China
title Steep topography buffers threatened gymnosperm species against anthropogenic pressures in China
title_full Steep topography buffers threatened gymnosperm species against anthropogenic pressures in China
title_fullStr Steep topography buffers threatened gymnosperm species against anthropogenic pressures in China
title_full_unstemmed Steep topography buffers threatened gymnosperm species against anthropogenic pressures in China
title_short Steep topography buffers threatened gymnosperm species against anthropogenic pressures in China
title_sort steep topography buffers threatened gymnosperm species against anthropogenic pressures in china
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7042744/
https://www.ncbi.nlm.nih.gov/pubmed/32128120
http://dx.doi.org/10.1002/ece3.5983
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