Phenological mismatch caused by water regime change may explain the population variation of the vulnerable lesser white-fronted goose in east Dongting Lake, China

Phenological mismatches between migratory birds and food availability driven by global warming have been found to influence the fitness and population dynamics of several herbivorous goose species in Arctic breeding sites. However, the effect of phenological mismatches at wintering sites have been i...

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Autores principales:	Pingyang Zhang, Yeai Zou, Yonghong Xie, Siqi Zhang, Feng Zhu, Xinsheng Chen, Feng Li, Zhengmiao Deng, Yi Yao, Yucheng Song
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Ecological mismatch NDVI Water regime Wintering site Anser erythropus Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/a741151e2fe445f7a5a80f1df4828fc4
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spelling	oai:doaj.org-article:a741151e2fe445f7a5a80f1df4828fc42021-12-01T04:53:25ZPhenological mismatch caused by water regime change may explain the population variation of the vulnerable lesser white-fronted goose in east Dongting Lake, China1470-160X10.1016/j.ecolind.2021.107776https://doaj.org/article/a741151e2fe445f7a5a80f1df4828fc42021-08-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21004416https://doaj.org/toc/1470-160XPhenological mismatches between migratory birds and food availability driven by global warming have been found to influence the fitness and population dynamics of several herbivorous goose species in Arctic breeding sites. However, the effect of phenological mismatches at wintering sites have been inadequately studied. We used long-term data to explore the consequences of water regime changes on phenological mismatch (i.e., days between arrival of geese and timing of the optimal Normalized Difference Vegetation Index [NDVIopt]) and detect the relative role of the mismatch as a driver of annual variations in abundance and distribution of the Lesser White-fronted Goose Anser erythropus (a vulnerable species on the IUCN Red List) in East Dongting Lake, which is the one of this species’ largest wintering sites worldwide. The NDVI of the Carex meadow (i.e., the dominant vegetation in East Dongting Lake wetland and also the major food resource for the geese) was used as the phenology metric. Results showed that the water recession pattern greatly influenced food conditions when geese arrived at the site. Early water recession led to significantly higher NDVI, whereas late water recession led to significantly lower NDVI than did the optimal water recession. However, the suitable habitat area was significantly larger under the optimal water recession pattern. Both early and late water level recessions caused greater mismatches and resulted in lower geese abundance and a more concentrated distribution. NDVI was positively correlated with aboveground biomass and negatively correlated with N% of Carex spp. High biomass and low N% related to high NDVI caused by early water recession may indicate unfavorable food conditions at the time that geese arrive and reduced sustainable food availability in mid-winter, while a low NDVI and limited habitat area caused by late water recession may indicate an insufficient food supply. In conclusion, non-optimal water recession led to a greater phenological mismatch and resulted in limited habitat quality (e.g., lower leaf N%) under early water recession but limited habitat quantity (e.g., smaller habitat area and lower aboveground biomass) under late water recession, and ultimately threatened the Lesser White-fronted Goose. Our results contributed to explaining the decline of the Lesser White-fronted Goose population in this wintering site.Pingyang ZhangYeai ZouYonghong XieSiqi ZhangFeng ZhuXinsheng ChenFeng LiZhengmiao DengYi YaoYucheng SongElsevierarticleEcological mismatchNDVIWater regimeWintering siteAnser erythropusEcologyQH540-549.5ENEcological Indicators, Vol 127, Iss , Pp 107776- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ecological mismatch NDVI Water regime Wintering site Anser erythropus Ecology QH540-549.5
spellingShingle	Ecological mismatch NDVI Water regime Wintering site Anser erythropus Ecology QH540-549.5 Pingyang Zhang Yeai Zou Yonghong Xie Siqi Zhang Feng Zhu Xinsheng Chen Feng Li Zhengmiao Deng Yi Yao Yucheng Song Phenological mismatch caused by water regime change may explain the population variation of the vulnerable lesser white-fronted goose in east Dongting Lake, China
description	Phenological mismatches between migratory birds and food availability driven by global warming have been found to influence the fitness and population dynamics of several herbivorous goose species in Arctic breeding sites. However, the effect of phenological mismatches at wintering sites have been inadequately studied. We used long-term data to explore the consequences of water regime changes on phenological mismatch (i.e., days between arrival of geese and timing of the optimal Normalized Difference Vegetation Index [NDVIopt]) and detect the relative role of the mismatch as a driver of annual variations in abundance and distribution of the Lesser White-fronted Goose Anser erythropus (a vulnerable species on the IUCN Red List) in East Dongting Lake, which is the one of this species’ largest wintering sites worldwide. The NDVI of the Carex meadow (i.e., the dominant vegetation in East Dongting Lake wetland and also the major food resource for the geese) was used as the phenology metric. Results showed that the water recession pattern greatly influenced food conditions when geese arrived at the site. Early water recession led to significantly higher NDVI, whereas late water recession led to significantly lower NDVI than did the optimal water recession. However, the suitable habitat area was significantly larger under the optimal water recession pattern. Both early and late water level recessions caused greater mismatches and resulted in lower geese abundance and a more concentrated distribution. NDVI was positively correlated with aboveground biomass and negatively correlated with N% of Carex spp. High biomass and low N% related to high NDVI caused by early water recession may indicate unfavorable food conditions at the time that geese arrive and reduced sustainable food availability in mid-winter, while a low NDVI and limited habitat area caused by late water recession may indicate an insufficient food supply. In conclusion, non-optimal water recession led to a greater phenological mismatch and resulted in limited habitat quality (e.g., lower leaf N%) under early water recession but limited habitat quantity (e.g., smaller habitat area and lower aboveground biomass) under late water recession, and ultimately threatened the Lesser White-fronted Goose. Our results contributed to explaining the decline of the Lesser White-fronted Goose population in this wintering site.
format	article
author	Pingyang Zhang Yeai Zou Yonghong Xie Siqi Zhang Feng Zhu Xinsheng Chen Feng Li Zhengmiao Deng Yi Yao Yucheng Song
author_facet	Pingyang Zhang Yeai Zou Yonghong Xie Siqi Zhang Feng Zhu Xinsheng Chen Feng Li Zhengmiao Deng Yi Yao Yucheng Song
author_sort	Pingyang Zhang
title	Phenological mismatch caused by water regime change may explain the population variation of the vulnerable lesser white-fronted goose in east Dongting Lake, China
title_short	Phenological mismatch caused by water regime change may explain the population variation of the vulnerable lesser white-fronted goose in east Dongting Lake, China
title_full	Phenological mismatch caused by water regime change may explain the population variation of the vulnerable lesser white-fronted goose in east Dongting Lake, China
title_fullStr	Phenological mismatch caused by water regime change may explain the population variation of the vulnerable lesser white-fronted goose in east Dongting Lake, China
title_full_unstemmed	Phenological mismatch caused by water regime change may explain the population variation of the vulnerable lesser white-fronted goose in east Dongting Lake, China
title_sort	phenological mismatch caused by water regime change may explain the population variation of the vulnerable lesser white-fronted goose in east dongting lake, china
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/a741151e2fe445f7a5a80f1df4828fc4
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Phenological mismatch caused by water regime change may explain the population variation of the vulnerable lesser white-fronted goose in east Dongting Lake, China

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