Population-level metrics of trophic structure based on stable isotopes and their application to invasion ecology.

PloS One
Michelle C JacksonJonathan Grey

Abstract

Biological invasions are a significant driver of human-induced global change and many ecosystems sustain sympatric invaders. Interactions occurring among these invaders have important implications for ecosystem structure and functioning, yet they are poorly understood. Here we apply newly developed metrics derived from stable isotope data to provide quantitative measures of trophic diversity within populations or species. We then use these to test the hypothesis that sympatric invaders belonging to the same functional feeding group occupy a smaller isotopic niche than their allopatric counterparts. Two introduced, globally important, benthic omnivores, Louisiana swamp crayfish (Procambarus clarkii) and carp (Cyprinus carpio), are sympatric in Lake Naivasha, Kenya. We applied our metrics to an 8-year data set encompassing the establishment of carp in the lake. We found a strong asymmetric interaction between the two invasive populations, as indicated by inverse correlations between carp abundance and measures of crayfish trophic diversity. Lack of isotopic niche overlap between carp and crayfish in the majority of years indicated a predominantly indirect interaction. We suggest that carp-induced habitat alteration reduced the di...Continue Reading

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Citations

Nov 10, 2013·PloS One·Jessica E M van der WalElisabeth S Bakker
Mar 13, 2016·Trends in Parasitology·J Robert Britton, Demetra Andreou
May 20, 2015·Scientific Reports·Agnes M L KarlsonRagnar Elmgren
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Jun 24, 2015·PloS One·Olatz San SebastiánÁlex Richter-Boix
Jan 7, 2014·PloS One·Anik Brind'Amour, Stanislas F Dubois
Jun 11, 2015·Anais Da Academia Brasileira De Ciências·Juliana S PhilippsenEvanilde Benedito
Jul 14, 2017·PloS One·Vanessa Villanova KuhnenEleonore Zulnara Freire Setz
Apr 17, 2016·The Journal of Animal Ecology·Michelle C JacksonIan Donohue
Mar 24, 2018·PloS One·Edoardo CalizzaMaria Letizia Costantini
Mar 28, 2018·Scientific Reports·Taylor R HermesCheryl A Makarewicz
Jun 20, 2018·Biological Reviews of the Cambridge Philosophical Society·Anton M PotapovStefan Scheu
Aug 3, 2017·PloS One·Hillary YoungSimone Baumann-Pickering
Mar 9, 2018·Royal Society Open Science·Agnes M L KarlsonElena Gorokhova
Dec 4, 2019·PeerJ·Lorenzo Alvarez-FilipFrancisco J González-Barrios
Jan 1, 2017·Aquatic Sciences·Kevin A WoodJonathan Grey
Nov 27, 2018·Royal Society Open Science·David J YurkowskiAaron T Fisk
Mar 5, 2020·Ecology and Evolution·Charlotte FrancesiazArnaud Béchet
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Jan 8, 2021·Environmental Science & Technology·Flavien GarciaJulien Cucherousset
Oct 5, 2021·The Journal of Animal Ecology·Ericka O C ConiIvan Nagelkerken

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