Is negative density-dependent reproduction regulated by density-induced stress in root voles? Two field experiments

	Is negative density-dependent reproduction regulated by density-induced stress in root voles? Two field experiments
	Shang, GZ; Du, SY; Yang, YB; Wu, Y; Cao, YF; Bian, JH
刊名	ECOLOGY AND EVOLUTION
	2022
卷号	12 期号:5
英文摘要	Density dependence in reproduction plays an important role in stabilizing population dynamics via immediate negative feedback from population density to reproductive output. Although previous studies have shown that negative density-dependent reproduction is associated with strong spacing behavior and social interaction between individuals, the proximal mechanism for generating negative density-dependent reproduction remains unclear. In this study, we investigated the effects of density-induced stress on reproduction in root voles. Enclosed founder populations were established by introducing 6 (low density) and 30 (high density) adults per sex into per enclosure (four enclosures per density in total) during the breeding season from April to July 2012 and from May to August 2015. Fecal corticosterone metabolite (FCM) levels, reproductive traits (recruitment rate and the proportion of reproductively active individuals), and founder population numbers were measured following repeated live trapping in both years. The number of founders was negatively associated with recruitment rates and the proportion of reproductively active individuals, displaying a negative density-dependent reproduction. FCM level was positively associated with the number of founders. The number of founder females directly affected the proportion of reproductive females, and directly and indirectly through their FCM levels affected the recruitment rate; the effect of the number of male founders on the proportion of reproductive males was mediated by their FCM level. Our results showed that density-induced stress negatively affected reproductive traits and that density-induced stress is one ecological factor generating negative density-dependent reproduction.
内容类型	期刊论文
源URL	[http://210.75.249.4/handle/363003/61227]
专题	西北高原生物研究所_中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Shang, GZ,Du, SY,Yang, YB,et al. Is negative density-dependent reproduction regulated by density-induced stress in root voles? Two field experiments[J]. ECOLOGY AND EVOLUTION,2022,12(5).
APA	Shang, GZ,Du, SY,Yang, YB,Wu, Y,Cao, YF,&Bian, JH.(2022).Is negative density-dependent reproduction regulated by density-induced stress in root voles? Two field experiments.ECOLOGY AND EVOLUTION,12(5).
MLA	Shang, GZ,et al."Is negative density-dependent reproduction regulated by density-induced stress in root voles? Two field experiments".ECOLOGY AND EVOLUTION 12.5(2022).