Food resources and competition rather than eco-geographic rules explain trait variations in two contrasting rat species: Implications for future climate change

doi:10.1016/j.gecco.2022.e02339

	Food resources and competition rather than eco-geographic rules explain trait variations in two contrasting rat species: Implications for future climate change
	Cui, Jifa 1,2; Lei, Boyu 1; Newman, Chris 3; Zhou, Youbing 1; Wang, Zhiping 2
	2022
发表期刊	GLOBAL ECOLOGY AND CONSERVATION
卷号	40
摘要	Understanding how morphological traits are influenced by temperature, resource availability and competition is critical for predicting future ecosystem resilience to climate change. Here we tested the effects of biotic and abiotic factors, on the morphology of two contrasting Muridae species (Chinese white-bellied rats Niviventer confucianus [n = 565; 57.1 g] and Edwards's long-tailed giant rats Leopoldamys edwardsi [n = 45; 459.5 g]) in relation to Bergmann's, Allen's, Hesse's and Geist's eco-geographical rules along a 2900-m elevational gradient. Specifically, we tested the body size threshold theory, which posits that animals heavier than 0.16 kg are more likely to follow Bergmann's rule. We measured body length and mass, appendage lengths and heart mass for 610 adult specimens from 115 localities, and used principal components analysis to quantify food resource availability. Linear mixed models were employed to test these eco-geographical rules, along with the effects of associated biotic and abiotic factors. We found that for N. confucianus (< 0.16 kg), colder temperatures were associated with smaller body-size, contrary to Bergmann's rule, and with greater interspecific competition and food abundance (supporting Geist's rule). There was no support for Allen's rule, except for a contrary effect on snout length among females; however, greater intraspecific competition and lesser food abun-dance were associated with shorter snout length, supporting Geist's rule. Heart size increased with colder temperatures, but only among females, partly supporting Hesse's rule, and decreased with greater intraspecific competition for both sexes. L. edwardsi (> 0.16 kg) did not conform with any eco-geographic rules, and so we found no support for the body size threshold theory. Our study proposes that food resource abundance and inter-and intraspecific competition mediated variations in morphological traits in these rodent species to a greater extent than any reduction in temperature alone, giving little support for ecogeographical rule effects. We interpret that where food supply can meet energetic demands, even under colder conditions, then any selective pressure for thermal/energy efficiency through larger body size and shorter appendages will be alleviated. Considering the full range of inter-related factors that are affected by temperature, rather than just the bio-physics of heat loss, is important to better predict future climate change responses.
关键词	Allen?s rule Bergmann?s rule Eco-geographical rule Food resource Hesse?s rule Temperature
学科领域	Biodiversity Conservation ; Ecology
DOI	10.1016/j.gecco.2022.e02339
收录类别	SCI
语种	英语
WOS关键词	BODY-SIZE EVOLUTION ; BERGMANNS RULE ; METABOLIC-RATE ; THERMAL NICHE ; MAMMALS ; MORPHOLOGY ; DIVERSITY ; RESPONSES ; MICE ; CONSEQUENCES
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000895802400011
出版者	ELSEVIER
文献子类	Article
出版地	AMSTERDAM
EISSN	2351-9894
资助机构	National Natural Science Foundation of China ; [31971541]
作者邮箱	wangzp5@ibcas.ac.cn
作品OA属性	gold
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/28886
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.China Three Gorges Univ, Engn Res Ctr Ecoenvironm Three Gorges Reservoir Re, Yichang 443002, Hubei, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Univ Oxford, Recanati Kaplan Ctr, Dept Zool, Wildlife Conservat Res Unit, Tubney House, Abingdon OX13 5QL, England
推荐引用方式 GB/T 7714	Cui, Jifa,Lei, Boyu,Newman, Chris,et al. Food resources and competition rather than eco-geographic rules explain trait variations in two contrasting rat species: Implications for future climate change[J]. GLOBAL ECOLOGY AND CONSERVATION,2022,40.
APA	Cui, Jifa,Lei, Boyu,Newman, Chris,Zhou, Youbing,&Wang, Zhiping.(2022).Food resources and competition rather than eco-geographic rules explain trait variations in two contrasting rat species: Implications for future climate change.GLOBAL ECOLOGY AND CONSERVATION,40.
MLA	Cui, Jifa,et al."Food resources and competition rather than eco-geographic rules explain trait variations in two contrasting rat species: Implications for future climate change".GLOBAL ECOLOGY AND CONSERVATION 40(2022).

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