Results 31 to 40 of about 21,213 (294)
Ecology and Evolution, 2023 Information on resource use and trophic dynamics of marine predators is important for understanding their role in ecosystem functioning and predicting population‐level responses to environmental change.
Jonathan A. Botha +8 more
doaj +1 more source
Stable isotopes reveal differences in diet among reed bunting subspecies that vary in bill size [PDF]
, 2016 Reed bunting Emberiza schoeniclus subspecies vary considerably in bill size and shape and seem to be at an early stage of speciation, in which bill might be indirectly causing reproductive isolation.
de Oliveira Gordinho, Luís +5 more
core +2 more sources
Endangered Species Research, 2023 Co-occurring species with similar resource requirements often partition ecological niches at different spatial and temporal scales. In the Northwest Atlantic (NWA), federally endangered roseate terns Sterna dougallii nest almost exclusively in coastal ...
HD Legett +3 more
doaj +1 more source
Solving the woolly mammoth conundrum: amino acid 15N-enrichment suggests a distinct forage or habitat [PDF]
, 2015 Understanding woolly mammoth ecology is key to understanding Pleistocene community dynamics and evaluating the roles of human hunting and climate change in late Quaternary megafaunal extinctions. Previous isotopic studies of mammoths’ diet and physiology
Longstaffe, Fred J +3 more
core +2 more sources
Isotopic niche partitioning in two sympatric howler monkey species
American Journal of Physical Anthropology, 2020 AbstractObjectivesEcological similarity between species can lead to interspecific trophic competition. However, when ecologically similar species coexist, they may differ in foraging strategies and habitat use, which can lead to niche partitioning.
Elizabeth Flores‐Escobar +6 more
openaire +4 more sources
Ecology and Evolution, 2021 Sympatric harbour (Phoca vitulina) and grey seals (Halichoerus grypus) are increasingly considered potential competitors, especially since recent local declines in harbour seal numbers while grey seal numbers remained stable or increased at their ...
Yann Planque +5 more
doaj +1 more source
Dietary and isotopic specialization: the isotopic niche of three Cinclodes ovenbirds
Oecologia, 2009 By comparing the isotopic composition of tissues deposited at different times, we can identify individuals that shift diets over time and individuals with constant diets. We define an individual as an isotopic specialist if tissues deposited at different times have similar isotopic composition. If tissues deposited at different times differ in isotopic
Martínez del Río, Carlos +3 more
openaire +5 more sources
Human-modified landscapes narrow the isotopic niche of neotropical birds
Oecologia, 2021 Deforestation and habitat loss resulting from land use changes are some of the utmost anthropogenic impacts that threaten tropical birds in human-modified landscapes (HMLs). The degree of these impacts on birds' diet, habitat use, and ecological niche can be measured by isotopic analysis. We investigated whether the isotopic niche width, food resources,
Ana Beatriz Navarro +13 more
openaire +4 more sources
Isotopic niches of sympatric native and exotic fish species in a Neotropical floodplain
Anais da Academia Brasileira de Ciências, 2015 This study investigated the isotopic niches of two fish species, one exotic and one native. It was hypothesized that these species would show little or no isotopic niche overlap.
Juliana S. Philippsen +2 more
doaj +1 more source
Frontiers in Marine Science, 2023 Stable isotope analysis is an approach that allows inferring feeding ecology and trophic structure of populations, especially for species that are difficult to observe in natural habitats, such as marine turtles. This study investigated the niche breadth
Amanda Fernandes +8 more
doaj +1 more source