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Effects of disturbances on aboveground biomass of alpine meadow in the Yellow River Source Zone, Western China
A field experiment quantifies the impacts of two external disturbances (mowing‐simulated grazing and number of pika) on aboveground biomass (AGB) in the Yellow River Source Zone from 2018 to 2020. AGB was estimated from drone images for 27 plots subject to three levels of each disturbance (none, mod...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8928900/ https://www.ncbi.nlm.nih.gov/pubmed/35342553 http://dx.doi.org/10.1002/ece3.8640 |
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author | Shi, Yan Gao, Jay Li, Xilai Li, Jiexia Brierley, Gary |
author_facet | Shi, Yan Gao, Jay Li, Xilai Li, Jiexia Brierley, Gary |
author_sort | Shi, Yan |
collection | PubMed |
description | A field experiment quantifies the impacts of two external disturbances (mowing‐simulated grazing and number of pika) on aboveground biomass (AGB) in the Yellow River Source Zone from 2018 to 2020. AGB was estimated from drone images for 27 plots subject to three levels of each disturbance (none, moderate, and severe). The three mowing severities bear a close relationship with AGB and its annual change. The effects of pika disturbance on AGB change were overwhelmed by the significantly different AGB at different mowing severities (−.471 < r < −.368), but can still be identified by inspecting each mowing intensity (−.884 < r < −.626). The impact of severe mowing on AGB loss was more profound than that of severe pika disturbance in heavily disturbed plots, and the joint effects of both severe disturbances had the most impacts on AGB loss. However, pika disturbance made little difference to AGB change in the moderate and non‐mowed plots. Mowing intensity weakens the relationship between pika population and AGB change, but pika disturbance hardly affects the relationship between mowing severity and AGB change. The effects of both disturbances on AGB were further complexified by the change in monthly mean temperature. Results indicate that reducing mowing intensity is more effective than controlling pika population in efforts to achieve sustainable grazing of heavily disturbed grassland. |
format | Online Article Text |
id | pubmed-8928900 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-89289002022-03-24 Effects of disturbances on aboveground biomass of alpine meadow in the Yellow River Source Zone, Western China Shi, Yan Gao, Jay Li, Xilai Li, Jiexia Brierley, Gary Ecol Evol Research Articles A field experiment quantifies the impacts of two external disturbances (mowing‐simulated grazing and number of pika) on aboveground biomass (AGB) in the Yellow River Source Zone from 2018 to 2020. AGB was estimated from drone images for 27 plots subject to three levels of each disturbance (none, moderate, and severe). The three mowing severities bear a close relationship with AGB and its annual change. The effects of pika disturbance on AGB change were overwhelmed by the significantly different AGB at different mowing severities (−.471 < r < −.368), but can still be identified by inspecting each mowing intensity (−.884 < r < −.626). The impact of severe mowing on AGB loss was more profound than that of severe pika disturbance in heavily disturbed plots, and the joint effects of both severe disturbances had the most impacts on AGB loss. However, pika disturbance made little difference to AGB change in the moderate and non‐mowed plots. Mowing intensity weakens the relationship between pika population and AGB change, but pika disturbance hardly affects the relationship between mowing severity and AGB change. The effects of both disturbances on AGB were further complexified by the change in monthly mean temperature. Results indicate that reducing mowing intensity is more effective than controlling pika population in efforts to achieve sustainable grazing of heavily disturbed grassland. John Wiley and Sons Inc. 2022-03-08 /pmc/articles/PMC8928900/ /pubmed/35342553 http://dx.doi.org/10.1002/ece3.8640 Text en © 2022 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Articles Shi, Yan Gao, Jay Li, Xilai Li, Jiexia Brierley, Gary Effects of disturbances on aboveground biomass of alpine meadow in the Yellow River Source Zone, Western China |
title | Effects of disturbances on aboveground biomass of alpine meadow in the Yellow River Source Zone, Western China |
title_full | Effects of disturbances on aboveground biomass of alpine meadow in the Yellow River Source Zone, Western China |
title_fullStr | Effects of disturbances on aboveground biomass of alpine meadow in the Yellow River Source Zone, Western China |
title_full_unstemmed | Effects of disturbances on aboveground biomass of alpine meadow in the Yellow River Source Zone, Western China |
title_short | Effects of disturbances on aboveground biomass of alpine meadow in the Yellow River Source Zone, Western China |
title_sort | effects of disturbances on aboveground biomass of alpine meadow in the yellow river source zone, western china |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8928900/ https://www.ncbi.nlm.nih.gov/pubmed/35342553 http://dx.doi.org/10.1002/ece3.8640 |
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