DOI: 10.1111/gcb.14151
Scopus记录号: 2-s2.0-85049502770
论文题名: Increased body size along urbanization gradients at both community and intraspecific level in macro-moths
作者: Merckx T. ; Kaiser A. ; Van Dyck H.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 8 起始页码: 3837
结束页码: 3848
语种: 英语
英文关键词: bat food webs
; body size shifts
; cascading effects
; human-induced rapid evolutionary change
; intraspecific trait variation
; light pollution
; pollinator networks
; urban ecology
Scopus关键词: bat
; body size
; evolution
; food web
; intraspecific variation
; light pollution
; moth
; pollinator
; urban ecosystem
; urbanization
; Hexapoda
; Lepidoptera
英文摘要: Urbanization involves a cocktail of human-induced rapid environmental changes and is forecasted to gain further importance. Urban-heat-island effects result in increased metabolic costs expected to drive shifts towards smaller body sizes. However, urban environments are also characterized by strong habitat fragmentation, often selecting for dispersal phenotypes. Here, we investigate to what extent, and at which spatial scale(s), urbanization drives body size shifts in macro-moths—an insect group characterized by positive size-dispersal links—at both the community and intraspecific level. Using light and bait trapping as part of a replicated, spatially nested sampling design, we show that despite the observed urban warming of their woodland habitat, macro-moth communities display considerable increases in community-weighted mean body size because of stronger filtering against small species along urbanization gradients. Urbanization drives intraspecific shifts towards increased body size too, at least for a third of species analysed. These results indicate that urbanization drives shifts towards larger, and hence, more mobile species and individuals in order to mitigate low connectivity of ecological resources in urban settings. Macro-moths are a key group within terrestrial ecosystems, and since body size is central to species interactions, such urbanization-driven phenotypic change may impact urban ecosystem functioning, especially in terms of nocturnal pollination and food web dynamics. Although we show that urbanization's size-biased filtering happens simultaneously and coherently at both the inter- and intraspecific level, we demonstrate that the impact at the community level is most pronounced at the 800 m radius scale, whereas species-specific size increases happen at local and landscape scales (50–3,200 m radius), depending on the species. Hence, measures—such as creating and improving urban green infrastructure—to mitigate the effects of urbanization on body size will have to be implemented at multiple spatial scales in order to be most effective. © 2018 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110303
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Behavioural Ecology and Conservation Group, Biodiversity Research Centre, Earth and Life Institute, Université catholique de Louvain (UCL), Louvain-la-Neuve, Belgium
Recommended Citation:
Merckx T.,Kaiser A.,Van Dyck H.. Increased body size along urbanization gradients at both community and intraspecific level in macro-moths[J]. Global Change Biology,2018-01-01,24(8)