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Range shifting species reduce phylogenetic diversity in high latitude communities via competition
Author(s) -
Fitt Robert N. L.,
Lancaster Lesley T.
Publication year - 2017
Publication title -
journal of animal ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.134
H-Index - 157
eISSN - 1365-2656
pISSN - 0021-8790
DOI - 10.1111/1365-2656.12655
Subject(s) - generalist and specialist species , biology , ecology , niche , coexistence theory , competition (biology) , range (aeronautics) , phylogenetic tree , biodiversity , phylogenetic diversity , ecological niche , niche differentiation , population , damselfly , interspecific competition , community , ecosystem , habitat , odonata , biochemistry , materials science , demography , sociology , gene , composite material
Summary Under anthropogenic climate change, many species are expanding their ranges to higher latitudes and altitudes, resulting in novel species interactions. The consequences of these range shifts for native species, patterns of local biodiversity and community structure in high latitude ecosystems are largely unknown but critical to understand in light of widespread poleward expansions by many warm‐adapted generalists. Using niche modelling, phylogenetic methods, and field and laboratory studies, we investigated how colonization of Scotland by a range expanding damselfly, I schnura elegans , influences patterns of competition and niche shifts in native damselfly species, and changes in phylogenetic community structure. Colonization by I . elegans was associated with reduced population density and niche shifts in the resident species least related to I . elegans ( L estes sponsa ), reflecting enhanced competition. Furthermore, communities colonized by I . elegans exhibited phylogenetic underdispersion, reflecting patterns of relatedness and competition. Our results provide a novel example of a potentially general mechanism whereby climate change‐mediated range shifts can reduce phylogenetic diversity within high latitude communities, if colonizing species are typically competitively superior to members of native communities that are least‐closely related to the colonizer.