干旱区生态环境知识资源中心(Arid): The limits of demographic buffering in coping with environmental variation

Arid

DOI	10.1111/oik.08343
	The limits of demographic buffering in coping with environmental variation
	Rodriguez-Caro, Roberto C.; Capdevila, Pol; Gracia, Eva; Barbosa, Jomar M.; Gimenez, Andres; Salguero-Gomez, Rob
通讯作者	Rodriguez-Caro, RC (corresponding author), Univ Miguel Herndndez, Dept Biol Aplicada, Alicante, Spain. ; Rodriguez-Caro, RC (corresponding author), Univ Oxford, Dept Zool, Oxford, England.
来源期刊	OIKOS
ISSN	0030-1299
EISSN	1600-0706
出版年	2021
英文摘要	Animal populations have developed multiple strategies to deal with environmental change. Among them, the demographic buffering strategy consists in constraining the temporal variation of the vital rate(s) that most affect(s) the overall performance of the population. Tortoises are known to buffer their temporal variation in adult survival, which typically has the highest contribution to the population growth rate lambda, at the expense of a high variability on reproductive rates, which contribute far less to lambda. To identify the effects of projected increases in droughts in its natural habitat, we use field data collected across 15 locations of Testudo graeca in southeast Spain over a decade. We analyse the effects of environmental variables on reproduction rates. In addition, we couple the demographic and environmental data to parameterise an integral projection model to simulate the effects of different scenarios of drought recurrence on lambda under different degrees of intensity in the survival-reproduction tradeoff. We find that droughts negatively affect the probability of laying eggs; however, the overall effects on lambda under the current drought recurrence (one/decade) are negligible when survival is constant (independent of the reduction of reproduction by drought events) and when survival increased as a tradeoff with the reduction of reproduction rates, with a threshold to population viability at three or more droughts/decade. Additionally, we show that, although some species may buffer current environmental regimes by carefully orchestrating how their vital rates vary through time, a demographic buffering strategy is insufficient to ensure population viability in extreme regimes. Our findings support the hypothesis that the demographic buffering strategy has a limit of effectiveness when adverse conditions occur frequently. Our methodological approach provides a framework for ecologists to determine how effective the management of environmental drivers can be for demographically buffering populations, and which scenarios may not provide long-term population persistence.
英文关键词	climate change drought integral projection models (IPM) life-history traits population growth rate reproduction rates Testudo graeca tortoise
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000655926800001
WOS关键词	SPUR-THIGHED TORTOISE ; FAST-SLOW CONTINUUM ; LIFE-HISTORY ; CLIMATE-CHANGE ; TESTUDO-GRAECA ; POPULATION VIABILITY ; DESERT TORTOISE ; SPECIES RICHNESS ; HATCHING SUCCESS ; VITAL-RATES
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
来源机构	University of Oxford
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/352416
作者单位	[Rodriguez-Caro, Roberto C.; Gracia, Eva; Barbosa, Jomar M.; Gimenez, Andres] Univ Miguel Herndndez, Dept Biol Aplicada, Alicante, Spain; [Gracia, Eva; Gimenez, Andres] Univ Miguel Herndndez, Ctr Invest & Innovac Agroalimentaria & Agroambien, Alicante, Spain; [Barbosa, Jomar M.] CSIC, Estn Biol Donana, Dept Conservat Biol, Seville, Spain; [Rodriguez-Caro, Roberto C.; Capdevila, Pol; Salguero-Gomez, Rob] Univ Oxford, Dept Zool, Oxford, England; [Capdevila, Pol] Univ Bristol, Sch Biol Sci, Bristol, Avon, England; [Salguero-Gomez, Rob] Univ Queensland, Ctr Biodivers & Conservat Sci, St Lucia, Qld, Australia
推荐引用方式 GB/T 7714	Rodriguez-Caro, Roberto C.,Capdevila, Pol,Gracia, Eva,et al. The limits of demographic buffering in coping with environmental variation[J]. University of Oxford,2021.
APA	Rodriguez-Caro, Roberto C.,Capdevila, Pol,Gracia, Eva,Barbosa, Jomar M.,Gimenez, Andres,&Salguero-Gomez, Rob.(2021).The limits of demographic buffering in coping with environmental variation.OIKOS.
MLA	Rodriguez-Caro, Roberto C.,et al."The limits of demographic buffering in coping with environmental variation".OIKOS (2021).