Results 221 to 230 of about 18,551 (253)

Trophic niche overlap among Neotropical carnivores in a silvicultural landscape

Mammalia, 2023
Abstract To enable long-term coexistence, species need to differentiate at least one of the three main dimensions of the ecological niche (temporal, spatial, or trophic dimension). Here, we investigated whether mammalian predators ( Chrysocyon brachyurus ,
Ana Beatriz de Almeida, Marcelo Magioli, Carla Gheler-Costa, Luciano Martins Verdade, Thiago Simon Marques, Letícia de Cássia Gilli de Lima, Thomas Püttker   +6 more
openaire   +1 more source

Trophic Niche Overlap Of Lake Superior Nearshore Fishes

2023
Presentation for Great Lakes Fishery Commission Upper Lakes Committee on March 21-24, 2023 in Sault Sainte Marie, Ontario, Canada Science Inventory, CCTE products: https://cfpub.epa.gov/si/si_public_search_results.cfm?advSearch=true&showCriteria=2&keyword=CCTE&TIMSType=&TIMSSubTypeID=&epaNumber=&ombCat=Any& ...
Hanson, Jessie, Hoffman, Joel, Goldsworthy, Cory, Peterson, Nicholas, R. Hrabik, Thomas, Brady, Valerie, Lepak, Ryan, Gordon, Morgann   +7 more
openaire   +1 more source

Midsummer Trophic Overlap Between Guanaco and Sheep in Patagonian Rangelands

Rangeland Ecology & Management, 2020
Abstract Diet overlap estimation among species is important to understand interspecific interactions. Through these interactions, one species may extinguish others through competition or adapt through mechanisms such as resource partitioning. The introduction of domestic herbivores in a native assemblage may introduce competition for resources with ...
Felipe Pontigo, Sergio Radic, Claudio A. Moraga, Rubén Pulido, Paulo Corti   +4 more
openaire   +1 more source

Trophic overlap between native and invasive stream crayfish

Hydrobiologia, 2015
We examined trophic dynamics of a stream food web where invasive Orconectes neglectus appear to be displacing native O. eupunctus in the Spring River drainage of the Ozark Highlands, Missouri and Arkansas, USA. We collected crayfish species and possible food sources seasonally from a site of sympatry on the South Fork Spring River.
Daniel D. Magoulick, Glenn L. Piercey
openaire   +1 more source

Anthropogenic Disturbance Mediates Trophic Niche Overlap Between Sympatric Generalist Predators

Integrative Zoology
Abstract Human activities generally increase trophic overlap in predator guilds through resource subsidies, whereas the effects on whether sympatric species overlap or separate their niches are context‐dependent.
Hiroshi Tsunoda, Masumi Hisano, Masayuki U Saito   +2 more
exaly   +4 more sources

Trophic niche width and overlap of two sympatric gulls in the southwestern mediterranean

Oecologia, 1997
The diets of two potential competitor species, Audouin's Larus audouinii and yellow-legged gulls Larus cachinnans, were examined while they bred at the Chafarinas Islands during 1993, 1994, and 1995. Data were collected during two commercial fishing regimes: (1) trawling and purse seine fisheries, and (2) diurnal trawlers only.
Jacob, González-Solís, Daniel, Oro, Lluis, Jover, Xavier, Ruiz, Vittorio, Pedrocchi   +4 more
openaire   +2 more sources

A trophic overlap-based measure for species uniqueness in ecological networks

Ecological Modelling, 2015
Abstract Species importance is often defined by how central the role a species plays in a food web. Here we argue that species importance should also incorporate the concept of uniqueness of its network position. By developing a previous methodology, we propose a new approach for species uniqueness.
Lai, Shu-mei, Liu, Wei-chung, Jordán, Ferenc   +2 more
openaire   +2 more sources

Uniqueness measure based on the weighted trophic field overlap of species in the food web

Ecological Indicators, 2019
With the application of the topological network concept to study food webs, species uniqueness in terms of irreplaceability has begun to be considered when identifying important species in the ecosystem. Based on the uniqueness method of quantifying the interactions and trophic field overlap of species in food webs, we propose using the weighted ...
Binduo Xu, Chongliang Zhang, Ying Xue
exaly   +2 more sources

Trophic niche overlap between native and non-native fishes

Hydrobiologia, 2014
In Mexico, non-native species are established in virtually every lake and represent one of the most important factors in species diversity loss. An iconic example is Lake Patzcuaro, which used to provide one of the most abundant fisheries of native species among freshwater systems in Mexico. But in the last decades, the relative abundance of non-native
Fernando Córdova-Tapia, Moisés Contreras, Luis Zambrano   +2 more
openaire   +1 more source

Revisiting a trophic overlap-based measure for species uniqueness in ecological networks

Community Ecology, 2021
Species uniqueness can be measured from the network perspective offering an alternative view to species importance. Direct and indirect effects between species can be quantified to construct a matrix that represents the interaction structure of the food web.
Wen-Hsien Lin, Wei-Chung Liu
openaire   +2 more sources