Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Shi, Yan, Gao, Jay, Li, Xilai, Li, Jiexia, Brierley, Gary
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2022
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
_version_ 1784670738825871360
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
work_keys_str_mv AT shiyan effectsofdisturbancesonabovegroundbiomassofalpinemeadowintheyellowriversourcezonewesternchina
AT gaojay effectsofdisturbancesonabovegroundbiomassofalpinemeadowintheyellowriversourcezonewesternchina
AT lixilai effectsofdisturbancesonabovegroundbiomassofalpinemeadowintheyellowriversourcezonewesternchina
AT lijiexia effectsofdisturbancesonabovegroundbiomassofalpinemeadowintheyellowriversourcezonewesternchina
AT brierleygary effectsofdisturbancesonabovegroundbiomassofalpinemeadowintheyellowriversourcezonewesternchina