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Bird-plant interactions and vulnerability to biological invasions

Journal of Plant Ecology 2016年第6期9卷 692-702页

作者： adam d.chupp Loretta L.Battaglia department of Plant Biology Southern Illinois UniversityLife Sciences IIMail Code 6509CarbondaleIL 62901-6509USA

Aims Species interactions regulate the invasiveness of non-native species and as declines of native tree species escalate,exotic tree species that offer supplementary resources to animal seed-dispersers should expand their distributions as they fill ecological *** primary objective was to forecast impacts from an imminent biological invasion(laurel wilt disease)by quantifying resources provided by native(threatened)and exotic fruits(disease-resistant)and associated bird foraging *** In the southeastern USA,we tested for redundancy among the resources provided by native and exotic fruits to overwintering *** between abundant subcanopy species Persea borbonia(native)and Cinnamomum camphora(exotic)were paramount considering the widespread disease-induced decline of ***,and the biological and phylogenetic similarities between these *** two winter survey periods,we quantified fruit removal and documented bird species using motion-activated cameras in the *** and chemical fruit characteristics were also *** Findings Foraging bouts on both *** and *** fruits were documented for four native bird *** was no difference in selectivity between fruit types during Year 1 of our survey,but there was a significant preference for *** fruit in Year 2;the change in preference was correlated with significantly lower temperatures in Year *** the pulp/seed ratio and moisture content differed,the nutritional content of fruit pulp(g/100 g)was similar between fruit *** the apparent redundancy among these native and exotic fruit resources,we forecast increases in the consumption and dispersal of exotic propagules following the widespread laurel wilt disease-induced decline of *** and other native fruit bearing members of *** empirically based prediction is among the first to document exotic forest pathogens as indirect threats to native bird-plant int

关键词： bird frugivory forest pests and pathogens Cinnamomum camphora laurel wilt disease Persea borbonia

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