ORCID Profile
0000-0003-3213-6087
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Publisher: Springer Science and Business Media LLC
Date: 03-01-2022
Publisher: Springer Science and Business Media LLC
Date: 22-01-2015
Publisher: Elsevier BV
Date: 09-2019
DOI: 10.1016/J.MARENVRES.2019.104755
Abstract: The Humboldt Current System presents high interannual variability, influenced by the El Niño Southern Oscillation (ENSO), whose implications in wildlife are not fully understood. We studied the isotopic niche of wild Humboldt penguins at Punta San Juan (Peru) during the pre-moult foraging trip in 4 consecutive years (2008-2011) under known oceanographic (ENSO) conditions. Our results show that there is a clear isotopic niche segregation (on both δ
Publisher: Oxford University Press (OUP)
Date: 07-2014
DOI: 10.1642/AUK-13-172.1
Publisher: Inter-Research Science Center
Date: 12-07-2013
DOI: 10.3354/MEPS10332
Publisher: Authorea, Inc.
Date: 09-05-2023
DOI: 10.22541/AU.168361403.31166937/V1
Abstract: The consequences of biological invasions and habitat degradation for native bio ersity depend on how species cope with the in idual and synergetic challenges these processes present. To assess the impact of anthropogenic land-use on the food web architecture of an invaded community, we examine the diets of nine native and two highly invasive mammal species at different trophic levels, inhabiting different land-uses across six biogeographic regions in Tasmania, Australia. We use two complementary methods, environmental DNA metabarcoding analysis (eDNA) of faeces and stable isotope analysis (SIA) of nitrogen (N) and carbon (C) in whole blood, to account for the high inter-in idual and temporal variability in animal diets. eDNA showed regionalisation in the diet of smaller species, with land-use further defining dietary taxa within each region. SIA revealed that bioregion and land-use influence the δ13C values of all carnivore species and omnivores, whereas the δ15N values of these species are influenced only by land-use and not bioregion. Including multiple species showed that native rats are changing their diet in response to the presence of invasive rats, an impact that would have been otherwise attributed to land-use. Our findings demonstrate that human activities and invasive species are molding the diets of invaded communities raising questions about the potential impacts that dietary modifications will have on the life-history traits and the evolutionary consequences these modifications might have on the survival of native species. This highlights the urgency to include human activities in ecological studies and the importance of targeting multispecies assemblages to gain a better understanding of synergetic impacts on native bio ersity.
Location: Peru
No related grants have been discovered for Antje Chiu Werner.