High trophic niche overlap in mixed?species colonies using artificial nests
نویسندگان
چکیده
Although successful at recovering endangered populations, conservation actions based on nest provisioning seldom consider how they shape the composition of communities and alter interspecific interactions. Specifically, extent to which dietary overlap within these may affect target species has rarely been assessed. In Southern Europe, sites large-scale nest-site aimed Lesser Kestrels Falco naumanni populations have attracted non-target bird species, resulting in mixed breeding assemblages that might promote competition for resources during breeding. Here we used stable isotope analysis (?15N ?13C) assess inter- intraspecific segregation investigate mechanisms allowing coexistence. We examined resource partitioning trophic niche among Kestrels, Common tinnunculus, European Rollers Coracias garrulus, Western Barn Owls Tyto alba, Little Athene noctua Spotless Starlings Sturnus unicolor; between parents their offspring. Similar ratios highly overlapped niches, particularly Starlings, suggest limited use similar prey. Within parent–offspring was marked across all species. Our results indicate occupy ecological despite a potential increase competition. High availability area permit coexistence but viability mixed-species groups be compromised areas with resources, are predicted expand ongoing human- climate-induced changes. Conservation practices should niches as well
منابع مشابه
Selection Algorithm Using Artificial Ant Colonies
We developed one stochastic model for intelligent selection of software components. The selection is done using a XML file containing the most relevant characteristics for each component. XML file has an extra field called "pheromone", which is a concept taken from ant colonies systems. This algorithm can be used for component, service and resource selection; this is possible because our model ...
متن کاملNiche width and overlap pdf
This measure ranges between 0 no overlap and 1 complete overlap, so 0. We investigated the niche breadth and overlap of the fish species occurring in four environments affected by the Coaracy Nunes reservoir, in the Amapá.Individual foraging specialization: niche width versus niche overlap. Sargeant sargeantfiu.edu, Dept of Biology, Georgetown Univ.of these insects, and their trophic niche brea...
متن کاملLivestock grazing and trampling of birds’ nests: an experiment using artificial nests
The purpose of this study is to experimentally determine the differences between four grazing treatments on the trampling of nests. Additionally, we examine to what extent the trampling probability of nests is higher close to a source of fresh water. We compare the trampling of artificial nests in five different grazing treatments in an experimental design. We use buried clay pigeon targets as ...
متن کاملNiche overlap and diffuse competition.
Current theory predicts a distinct upper limit on the permissible degree of niche overlap; moreover, theory suggests that maximal tolerable overlap should be relatively insensitive to environmental variability. Data presented here demonstrate that, within the lizard subset of natural desert communities, niche overlap decreases both with increasing environmental variability and with increasing n...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Ibis
سال: 2022
ISSN: ['1474-919X', '0019-1019']
DOI: https://doi.org/10.1111/ibi.13059