Nonlinear effect of density on trophic niche width and between-individual variation in diet in a neotropical cichlid

2016 ◽  
Vol 41 (5) ◽  
pp. 492-500 ◽  
Author(s):  
Lúcia Mateus ◽  
Jean Ortega ◽  
Angélica Mendes ◽  
Jerry Penha
Keyword(s):  
Individual Variation ◽  
Nonlinear Effect ◽  
Trophic Niche ◽  
Niche Width

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

Oecologia ◽  
1997 ◽  
Vol 112 (1) ◽  
pp. 75-80 ◽  
Author(s):  
Jacob González-Solís ◽  
Daniel Oro ◽  
Lluis Jover ◽  
Xavier Ruiz ◽  
Vittorio Pedrocchi
Keyword(s):  
Trophic Niche ◽  
Niche Width

scholarly journals Prey availability, prey selection, and trophic niche width in the lizard Psammodromus algirus along an elevational gradient

2017 ◽  
Vol 64 (5) ◽  
pp. 603-613 ◽  
Author(s):  
Gregorio Moreno-Rueda ◽  
Elena Melero ◽  
Senda Reguera ◽  
Francisco J Zamora-Camacho ◽  
Inés Álvarez-Benito
Keyword(s):  
Prey Availability ◽  
Prey Selection ◽  
Elevational Gradient ◽  
Trophic Niche ◽  
Niche Width ◽  
Psammodromus Algirus

scholarly journals Determining trophic niche width: an experimental test of the stable isotope approach

Oikos ◽  
2012 ◽  
Vol 121 (12) ◽  
pp. 1985-1994 ◽  
Author(s):  
Patrick Fink ◽  
Elke S. Reichwaldt ◽  
Chris Harrod ◽  
Axel G. Rossberg
Keyword(s):  
Stable Isotope ◽  
Experimental Test ◽  
Trophic Niche ◽  
Niche Width

Resource utilization and trophic niche width in sandy beach macrobenthos from an oligotrophic coast

2017 ◽  
Vol 184 ◽  
pp. 115-125 ◽  
Author(s):  
Kelly Ortega-Cisneros ◽  
Ander M. de Lecea ◽  
Albertus J. Smit ◽  
David S. Schoeman
Keyword(s):  
Resource Utilization ◽  
Sandy Beach ◽  
Trophic Niche ◽  
Niche Width

scholarly journals Can We Share? Feeding Strategy in Three Syntopic Newts in Artificial Habitats

Diversity ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 32
Author(s):  
Luca Stellati ◽  
Jennifer Mirabasso ◽  
Luca Luiselli ◽  
Marco A. Bologna ◽  
Leonardo Vignoli ◽  
...  
Keyword(s):  
Prey Availability ◽  
Feeding Strategy ◽  
Central Italy ◽  
Trophic Niche ◽  
Niche Width ◽  
Amphibian Conservation ◽  
Natural Habitats ◽  
Trophic Conditions ◽  
Smooth Newt ◽  
Lissotriton Vulgaris

Natural aquatic sites are disappearing worldwide, especially in the Mediterranean region where amphibians are frequently forced to move for reproduction to artificial sites designed for irrigation and cattle watering (i.e., wells, tanks and drinking troughs). In artificial aquatic sites, where resources (space and food) are usually limited, trophic niche information can be particularly useful to infer the suitability of habitats for amphibian conservation especially when more than one species co-occurs. In this paper, we focused on three newt species: The Italian newt (Lissotriton italicus), the Italian smooth newt (Lissotriton vulgaris meridionalis) and the Italian crested newt (Triturus carnifex) inhabiting man-made wells widespread in an area in Central Italy characterized by few available natural aquatic sites. Specifically, we analyzed the trophic spectrum of the species, their interactions and overlap, and discussed the potential role of wells in amphibian conservation. Overall, 550 newt individuals occurring in 16 distinct wells were sampled. The study species consumed similar resources, mainly of aquatic origin, with Diptera larvae and Cladocera representing the most important preys. The high degree of diet overlap observed may be due to site oligotrophy and high availability of small-sized prey, and it does not necessarily lead to competition. Newts had similar narrow niche width values and a generalist feeding pattern with high diversity among individuals. Lissotriton italicus and T. carnifex showed wider niche width in isolation than in syntopy condition, probably as a result of interspecific competition and/or intraguild predation. We showed that artificial aquatic sites are important for newt ecology and conservation since they allow up to three species to cohabit, thus representing a good surrogate of natural habitats. The study wells apparently provided suitable trophic conditions for newts in terms of prey availability and catchability. To date, just a few studies have contributed to a greater understanding of newts’ diet in artificial aquatic sites and this gap of knowledge has to be filled to clarify their role in amphibian ecology and conservation.

Seasonal isotopic niche of a rodent: High between‐individual variation but no changes in individual niche width during the rich‐resource period

Biotropica ◽  
2021 ◽  
Author(s):  
Nícholas F. Camargo ◽  
Guilherme G. Reis ◽  
Anna Carla L. Camargo ◽  
Gabriela B. Nardoto ◽  
Jamie M. Kneitel ◽  
...  
Keyword(s):  
Individual Variation ◽  
Niche Width ◽  
Isotopic Niche ◽  
The Rich

scholarly journals Trophic Niche Width, Shift, and Specialization of Dascyllus aruanus in Toliara Lagoon, Madagascar

Copeia ◽  
2010 ◽  
Vol 2010 (2) ◽  
pp. 218-226 ◽  
Author(s):  
Bruno Frédérich ◽  
Olivier Lehanse ◽  
Pierre Vandewalle ◽  
Gilles Lepoint
Keyword(s):  
Trophic Niche ◽  
Niche Width ◽  
Dascyllus Aruanus

scholarly journals Pollen Spectrum and Trophic Niche Width of Melipona scutellaris Latreille, 1811 (Hymenoptera: Apidae) in Highly Urbanized and Industrialized Sites

Sociobiology ◽  
2019 ◽  
Vol 66 (2) ◽  
pp. 279
Author(s):  
Brunelle Ramos Andrade ◽  
Andreia Santos do Nascimento ◽  
Emanuella Lopes Franco ◽  
Daiane Rodrigues dos Santos ◽  
Rogério Marcos De Oliveira Alves ◽  
...  
Keyword(s):  
Urban Areas ◽  
Regional Scale ◽  
Floristic Composition ◽  
Trophic Niche ◽  
Niche Width ◽  
Northeastern Brazil ◽  
Metropolitan Region ◽  
Pollen Spectrum ◽  
Rural And Urban Areas ◽  
Pollen Types

The floristic composition of an environment is important to ensure the trophic niche of bee species. Melipona scutellaris Latreille, is a typical stingless bee of Atlantic rainforest sites in northeastern Brazil, a region widely established in meliponaries for honey and pollen production. M. scutellaris is reared (meliponiculture) in rural and urban areas, where the species depends on the availability of different plants for nectar and pollen collection. In this study, we estimated food niche width, equitativity, and similarity between different colonies of M. scutellaris in highly urbanized and industrialized sites of the Metropolitan Region of Salvador, Bahia State, Brazil. We analyzed pollen spectrum of 58 honey samples from six meliponaries, during 12 months. We identified 111 pollen types distributed in 28 plant families. The Fabaceae family showed the highest diversity in pollen types (33.33% of the total) and Mimosa caesalpiniifolia was the most frequent pollen type, found in 100% of the samples. M. scutellaris concentrated its foraging activity on a few trophic resources (H’ = 2.69 and J’ = 0.01) indicating a few melittophilous plant species belonging to the genera Eucalyptus, Mimosa, Protium, Serjania and Tapirira, should be managed on a regional scale to favor meliponiculture with this native bee species.

Between-individual variation drives the seasonal dynamics in the trophic niche of a Neotropical marsupial

2012 ◽  
Vol 38 (6) ◽  
pp. 664-671 ◽  
Author(s):  
Mathias M. Pires ◽  
Eduardo G. Martins ◽  
Márcio S. Araújo ◽  
Sérgio F. dos Reis
Keyword(s):  
Individual Variation ◽  
Seasonal Dynamics ◽  
Trophic Niche

Spatial trophic variability of a coastal apex predator, the giant trevally Caranx ignobilis, in the western Indian Ocean

2020 ◽  
Vol 641 ◽  
pp. 195-208
Author(s):  
JR Glass ◽  
R Daly ◽  
PD Cowley ◽  
DM Post
Keyword(s):  
Indian Ocean ◽  
Trophic Ecology ◽  
Niche Breadth ◽  
Trophic Position ◽  
Western Indian Ocean ◽  
Trophic Niche ◽  
Niche Width ◽  
Apex Predator ◽  
Ontogenetic Changes ◽  
Top Predators

Top predators have substantial downstream effects on the structure, function, and resilience of ecosystems. The influence of top predators on an ecosystem can vary if they occur within multiple habitat types and have a wide niche breadth due to spatiotemporal changes in diet. We examined spatial patterns in trophic position and niche width for an economically important reef-associated fishery species, the giant trevally Caranx ignobilis. We sampled 4 localities in the western Indian Ocean representing different habitats: coral atolls, coastal reefs, and granitic islands. We analyzed isotopic ratios of carbon (13C/12C) and nitrogen (15N/14N), and performed compound-specific amino acid stable isotope analysis (AA-CSIA) to control for baseline nitrogen variation. Our analysis of 12 juveniles and 43 adults revealed wide variation in trophic niche breadth between sampling sites and an offshore to coastal gradient in carbon that drove niche distinctiveness between localities. We observed niche width patterns suggestive of ontogenetic changes in diet and habitat utilization and larger niche sizes at the oceanic island sites than the coastal site. Trophic position estimates ranged from 3.5-5, expanding the trophic range of C. ignobilis relative to previous studies using AA-CSIA and placing it at the equivalent trophic level as many predatory sharks. Our study corroborates prior evidence that C. ignobilis is an important apex predator in reef and island ecosystems. Additionally, we show how evaluating spatiotemporal components of trophic ecology of marine predators is critical for characterizing their functional role and ecosystem influence, allowing for targeted conservation efforts.

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