Assessing the likely effectiveness of multispecies management for imperiled desert fishes with niche overlap analysis

2015 ◽  
Vol 29 (4) ◽  
pp. 1153-1163 ◽  
Author(s):  
Brian G. Laub ◽  
Phaedra Budy
Keyword(s):  
Niche Overlap ◽  
Desert Fishes ◽  
Overlap Analysis ◽  
Multispecies Management

scholarly journals Shifts in Climatic Niche Occupation in Astrophytum Coahuilense (H. Möller) Kayser and Its Potential Distribution in Mexico

2019 ◽  
Vol 11 (4) ◽  
pp. 1138
Author(s):  
Gabriel Cardoza-Martínez ◽  
Jorge Becerra-López ◽  
Citlalli Esparza-Estrada ◽  
José Estrada-Rodríguez ◽  
Alexander Czaja ◽  
...  
Keyword(s):  
Potential Distribution ◽  
Niche Overlap ◽  
Climatic Conditions ◽  
Distribution Models ◽  
Climatic Niche ◽  
Principle Of Maximum Entropy ◽  
Climate Niche ◽  
Distribution Modeling ◽  
Overlap Analysis ◽  
Principle Of Maximum

It has frequently been reported that species with strong niche conservatism will not be able to adapt to new climatic conditions, so they must migrate or go extinct. We have evaluated the shifts in climatic niche occupation of the species Astrophytum coahuilense and its potential distribution in Mexico. We understand niche occupation as the geographic zones with available habitats and with the presence of the species. To assess shifts in climatic niche occupation, we used niche overlap analysis, while potential distribution modeling was performed based on the principle of maximum entropy. The results indicate that this species presents a limited amplitude in its climate niche. This restriction of the climatic niche of A. coahuilense limits its ability to colonize new geographical areas with different climatic environments. On the other hand, the potential distribution models obtained from the present study allow us to identify potential zones based on the climatic requirements of the species. This information is important to identify high priority areas for the conservation of A. coahuilense.

Spatiotemporal patterns in trophic niche overlap among five salmonines in Lake Michigan, USA

2020 ◽  
Vol 77 (6) ◽  
pp. 1059-1075 ◽  
Author(s):  
Matthew S. Kornis ◽  
David B. Bunnell ◽  
Heidi K. Swanson ◽  
Charles R. Bronte
Keyword(s):  
Brown Trout ◽  
Chinook Salmon ◽  
Lake Michigan ◽  
Lake Trout ◽  
Coho Salmon ◽  
Niche Overlap ◽  
Trophic Niche ◽  
Ecosystem Change ◽  
Forage Base ◽  
Overlap Analysis

Native lake trout (Salvelinus namaycush) and introduced Chinook salmon (Oncorhynchus tshawytscha), coho salmon (Oncorhynchus kisutch), steelhead (Oncorhynchus mykiss), and brown trout (Salmo trutta) are major predators in Lake Michigan’s complex ecosystem and collectively support a valuable recreational fishery, but declines in their primary prey, alewife (Alosa pseudoharengus), have raised ecological and management concerns about competition and prey allocation. We applied niche overlap analysis to evaluate competition among salmonine predators during rapid forage base change in Lake Michigan. δ13C and δ15N stable isotope ratios indicated that lake trout had a unique trophic niche from inclusion of offshore and benthic prey, with <29% lake-wide niche overlap with Chinook salmon, coho salmon, and steelhead. Brown trout had moderate overlap with other species (45%–91%), while Chinook salmon, coho salmon, and steelhead had high overlap (71%–98%). Regional differences in isotopic signatures highlighted the potential importance of subsystem differences in fish diets in large aquatic systems. The uniqueness of the lake trout niche, and broadness of brown trout and steelhead niches, suggest these species may be resilient to forage base changes. This study further demonstrates how niche overlap analysis can be applied to tease apart competitive interactions and their response to ecosystem change.

scholarly journals Lizard assemblage from a sand dune habitat from southeastern Brazil: a niche overlap analysis

2016 ◽  
Vol 88 (suppl 1) ◽  
pp. 677-687 ◽  
Author(s):  
GISELE R. WINCK ◽  
FABIO HATANO ◽  
DAVOR VRCIBRADIC ◽  
MONIQUE VAN SLUYS ◽  
CARLOS F.D. ROCHA
Keyword(s):  
Coastal Area ◽  
Sand Dune ◽  
Ecological Factors ◽  
Niche Overlap ◽  
Trophic Niche ◽  
Null Models ◽  
The Other ◽  
Southeastern Brazil ◽  
Microhabitat Use ◽  
Overlap Analysis

ABSTRACT Communities are structured by interactions of historical and ecological factors, which influence the use of different resources in time and space. We acquired data on time of activity, microhabitat use and diet of a lizard assemblage from a sand dune habitat in a coastal area, southeastern Brazil (Restinga de Jurubatiba). We analyzed the data of niche overlap among species in these three axes (temporal, spatial and trophic) using null models. We found a significant overlap within the trophic niche, whereas the overlap for the other axes did not differ from the expected. Based on this result, we discuss the factors acting on the structure of the local lizard community.

scholarly journals PERSAINGAN PORTAL BERITA ONLINE MENGGUNAKAN PRESPEKTIF TEORI NICHE PADA KAJIAN EKONOMI MEDIA

2020 ◽  
Vol 5 (2) ◽  
pp. 155
Author(s):  
Annisa Rizki Anandra ◽  
Rachmat Kriyantono ◽  
Antoni Antoni
Keyword(s):  
Life Support ◽  
Niche Breadth ◽  
Niche Overlap ◽  
Online News ◽  
Niche Theory ◽  
Traditional Media ◽  
Quantitative Content ◽  
New Public ◽  
The Media ◽  
Overlap Analysis

Online news portals are interesting objects to study because they are superior to traditional media. The presence of the web, makes many researchers see the emergence of new public spaces in which individuals can find and produce diverse information. The development of the media was interestingly researched on seven online news portals which became the pioneers of online media in Indonesia, namely Detik, Kompas, Republika, Okezone, Media Indonesia, Tempo and VIVA . The purpose of this research is to find out media competition by using niche theory perspectives in two aspects namely niche breadt and overlap niche from Detik, Kompas, Republika, Media Indonesia, Okezone, Tempo and VIVA in terms of message distribution. Researchers want to see how competition between online news portals is equally competitive with different media characteristics. The method used first is quantitative content analysis as initial data to calculate niche breadth and niche overlap, second niche breadth analysis, and thirdly niche overlap analysis of the seven online news portals studied.. The results show that media competition in the breadth niche is divided into two generalist parts and tends to be generalist. Generalists point out that online news portals do not depend on a single source of life support. The overlapping niche results show that the level of competition or overlap of the seven online news portals can be said to be high or tight. The high competition category is divided into three parts, namely, the highest, tend to be high and a little high.

Dietary overlap and food resource partitioning among fish species of a tropical estuary in Northeastern Brazil

Gaia Scientia ◽  
2016 ◽  
Vol 10 (4) ◽  
pp. 86-95 ◽  
Author(s):  
Adna Ferreira da Silva Garcia ◽  
Ana Lúcia Vendel
Keyword(s):  
Resource Partitioning ◽  
Species Coexistence ◽  
Food Resource ◽  
River Estuary ◽  
Niche Overlap ◽  
Northeastern Brazil ◽  
Dietary Overlap ◽  
Feeding Niche ◽  
Tropical Environments ◽  
Food Resource Partitioning

The current work investigates dietary overlap and food partitioning among nine abundant carnivorous fishes caught in the shallow waters of the Paraíba do Norte river estuary, Paraíba State, Brazil. Fishes were sampled with a beach seine net between January and December 2008 and a total of 958 specimens had their stomach content analyzed. Crustacea was the dominant food resource for Lutjanus alexandrei, L. jocu and Bathygobius soporator, whereas Telostei were consumed mainly by Centropomus undecimalis and C. parallelus. In contrast, Polychaeta were preyed upon mainly by Diapterus rhombeus, Eucinostomus argenteus, Sciades herzbergii and S. parkeri. Although most species consumed similar food items, they did that in varying proportions and amounts. Overall, the niche overlap among species was low (< 0.60), but there were several cases where pair of species had their feeding niche highly overlapped (between 0.72 and 0.97). These findings corroborate the hypothesis that food resource partitioning determines species coexistence in estuarine tropical environments.

scholarly journals Testing for equality of distributions using the concept of (niche) overlap

2021 ◽  
Author(s):  
Judith H. Parkinson-Schwarz ◽  
Arne C. Bathke
Keyword(s):  
Basic Assumption ◽  
Type I Error ◽  
Test Procedure ◽  
Niche Overlap ◽  
Relative Effect ◽  
Type I ◽  
Underlying Distribution ◽  
Parametric Test ◽  
Higher Power ◽  
Non Parametric

AbstractIn this paper, we propose a new non-parametric test for equality of distributions. The test is based on the recently introduced measure of (niche) overlap and its rank-based estimator. As the estimator makes only one basic assumption on the underlying distribution, namely continuity, the test is universal applicable in contrast to many tests that are restricted to only specific scenarios. By construction, the new test is capable of detecting differences in location and scale. It thus complements the large class of rank-based tests that are constructed based on the non-parametric relative effect. In simulations this new test procedure obtained higher power and lower type I error compared to two common tests in several settings. The new procedure shows overall good performance. Together with its simplicity, this test can be used broadly.

scholarly journals The food web in a subterranean ecosystem is driven by intraguild predation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Andrea Parimuchová ◽  
Lenka Petráková Dušátková ◽  
Ľubomír Kováč ◽  
Táňa Macháčková ◽  
Ondřej Slabý ◽  
...  
Keyword(s):  
Food Web ◽  
Trophic Interactions ◽  
Intraguild Predation ◽  
Linear Models ◽  
Niche Overlap ◽  
Trophic Niche ◽  
High Availability ◽  
Large Prey ◽  
Arthropod Predators ◽  
Body Sizes

AbstractTrophic interactions of cave arthropods have been understudied. We used molecular methods (NGS) to decipher the food web in the subterranean ecosystem of the Ardovská Cave (Western Carpathians, Slovakia). We collected five arthropod predators of the species Parasitus loricatus (gamasid mites), Eukoenenia spelaea (palpigrades), Quedius mesomelinus (beetles), and Porrhomma profundum and Centromerus cavernarum (both spiders) and prey belonging to several orders. Various arthropod orders were exploited as prey, and trophic interactions differed among the predators. Linear models were used to compare absolute and relative prey body sizes among the predators. Quedius exploited relatively small prey, while Eukoenenia and Parasitus fed on relatively large prey. Exploitation of eggs or cadavers is discussed. In contrast to previous studies, Eukoenenia was found to be carnivorous. A high proportion of intraguild predation was found in all predators. Intraspecific consumption (most likely cannibalism) was detected only in mites and beetles. Using Pianka’s index, the highest trophic niche overlaps were found between Porrhomma and Parasitus and between Centromerus and Eukoenenia, while the lowest niche overlap was found between Parasitus and Quedius. Contrary to what we expected, the high availability of Diptera and Isopoda as a potential prey in the studied system was not corroborated. Our work demonstrates that intraguild diet plays an important role in predators occupying subterranean ecosystems.

Sign in / Sign up

Export Citation Format

Share Document