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Alpine Treeline Dynamics and the Special Exposure Effect in the Hengduan Mountains
Alpine treeline is highly sensitive to climate change, but there remains a lack of research on the spatiotemporal heterogeneity of treeline and their relationships with climate change at the landscape scale. We extracted positions of alpine treeline from high-resolution Google Earth images from thre...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Frontiers Media S.A.
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9024247/ https://www.ncbi.nlm.nih.gov/pubmed/35463438 http://dx.doi.org/10.3389/fpls.2022.861231 |
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author | Zou, Fuyan Tu, Chengyi Liu, Dongmei Yang, Chaoying Wang, Wenli Zhang, Zhiming |
author_facet | Zou, Fuyan Tu, Chengyi Liu, Dongmei Yang, Chaoying Wang, Wenli Zhang, Zhiming |
author_sort | Zou, Fuyan |
collection | PubMed |
description | Alpine treeline is highly sensitive to climate change, but there remains a lack of research on the spatiotemporal heterogeneity of treeline and their relationships with climate change at the landscape scale. We extracted positions of alpine treeline from high-resolution Google Earth images from three periods (2000, 2010, and 2020) and analyzed the elevation patterns and dynamics of treeline positions in the Hengduan Mountains. Based on the treeline positions in 2020, a buffer zone of 300 m is established as the treeline transition zone, and the changing trend of the fraction vegetation cover (FVC) from 2000 to 2020 and its relationship with climate are also analyzed. Due to the special geographical and climatic environment, the treeline in the Hengduan Mountains area is high in the middle but lower in the surrounding areas. We found that over the past 20 years, the treeline position did not change significantly but that the FVC increased in 80.3% of the treeline areas. The increase in FVC was related to the decrease in precipitation in the growing season. The results also revealed a special exposure effect on the alpine treeline in the Hengduan Mountains. Because of the lower treeline, isotherm position caused by the monsoon climate, the treeline position on south-facing slopes is lower than that on slopes with other exposures. Our results confirmed that the pattern and dynamics of the alpine treeline are driven by the regional monsoon climate regime. |
format | Online Article Text |
id | pubmed-9024247 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-90242472022-04-23 Alpine Treeline Dynamics and the Special Exposure Effect in the Hengduan Mountains Zou, Fuyan Tu, Chengyi Liu, Dongmei Yang, Chaoying Wang, Wenli Zhang, Zhiming Front Plant Sci Plant Science Alpine treeline is highly sensitive to climate change, but there remains a lack of research on the spatiotemporal heterogeneity of treeline and their relationships with climate change at the landscape scale. We extracted positions of alpine treeline from high-resolution Google Earth images from three periods (2000, 2010, and 2020) and analyzed the elevation patterns and dynamics of treeline positions in the Hengduan Mountains. Based on the treeline positions in 2020, a buffer zone of 300 m is established as the treeline transition zone, and the changing trend of the fraction vegetation cover (FVC) from 2000 to 2020 and its relationship with climate are also analyzed. Due to the special geographical and climatic environment, the treeline in the Hengduan Mountains area is high in the middle but lower in the surrounding areas. We found that over the past 20 years, the treeline position did not change significantly but that the FVC increased in 80.3% of the treeline areas. The increase in FVC was related to the decrease in precipitation in the growing season. The results also revealed a special exposure effect on the alpine treeline in the Hengduan Mountains. Because of the lower treeline, isotherm position caused by the monsoon climate, the treeline position on south-facing slopes is lower than that on slopes with other exposures. Our results confirmed that the pattern and dynamics of the alpine treeline are driven by the regional monsoon climate regime. Frontiers Media S.A. 2022-04-08 /pmc/articles/PMC9024247/ /pubmed/35463438 http://dx.doi.org/10.3389/fpls.2022.861231 Text en Copyright © 2022 Zou, Tu, Liu, Yang, Wang and Zhang. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Plant Science Zou, Fuyan Tu, Chengyi Liu, Dongmei Yang, Chaoying Wang, Wenli Zhang, Zhiming Alpine Treeline Dynamics and the Special Exposure Effect in the Hengduan Mountains |
title | Alpine Treeline Dynamics and the Special Exposure Effect in the Hengduan Mountains |
title_full | Alpine Treeline Dynamics and the Special Exposure Effect in the Hengduan Mountains |
title_fullStr | Alpine Treeline Dynamics and the Special Exposure Effect in the Hengduan Mountains |
title_full_unstemmed | Alpine Treeline Dynamics and the Special Exposure Effect in the Hengduan Mountains |
title_short | Alpine Treeline Dynamics and the Special Exposure Effect in the Hengduan Mountains |
title_sort | alpine treeline dynamics and the special exposure effect in the hengduan mountains |
topic | Plant Science |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9024247/ https://www.ncbi.nlm.nih.gov/pubmed/35463438 http://dx.doi.org/10.3389/fpls.2022.861231 |
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