Simulated shifts in trophic niche breadth modulate range loss of alpine butterflies under climate change

Ecological parameters such as trophic niche overlap and niche breadth were computed from the frequency of all drosophilid species collected in 2001 and 2002, in the urban area of Porto Alegre city, Brazil. Independently of place, drosophilids community composition and components breeding or feeding sites, the highest frequencies of Zaprionus indianus (Gupta, 1970) were obtained during seasons with higher average temperatures, especially during summer. From a total of the 19,146 individuals of Z. indianus sampled, 80% were found in this season. The data of trophic niche breadth suggest a higher opportunism of adult flies in feeding substrate use, but the females are still selective in oviposition substrate choice. For the values of niche overlap, only for some species, did we find any correlation between these and species richness and/or number of resources, and the most of the correlation values considering breeding and feeding sites were positive. The colonization of Z. indianus in Porto Alegre could be leading to adjustments in the survival strategies of the resident species, but it is possible that many species have conditions for coexisting with the invader.

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Trophic niche breadth of pond zooplankton species using stable isotope analysis and the relationship with the abiotic and biotic factors

Royal Society Open Science ◽

10.1098/rsos.180917 ◽

2019 ◽

Vol 6 (1) ◽

pp. 180917 ◽

Cited By ~ 1

Author(s):

Hideyuki Doi ◽

Kwang-Hyeon Chang ◽

Shin-ichi Nakano

Keyword(s):

Stable Isotope ◽

Niche Breadth ◽

Resource Competition ◽

Feeding Habits ◽

Zooplankton Biomass ◽

Trophic Niche ◽

Zooplankton Species ◽

Carbon And Nitrogen ◽

Ecosystem Size ◽

The Relationship

Zooplankton species have different feeding habits, but the diversity of their food resources and the factors governing them are still largely unknown. We here estimated the differences in the trophic niche breadths of dominant zooplankton species in ponds, using stable isotopes. To understand the differences in trophic niches of different zooplankton species, we measured the carbon and nitrogen stable isotope ratios and calculated the nearest-neighbour distance (NND), and standard deviation of NND (SDNND) of the bi-plot space of stable carbon and nitrogen isotopes in pond zooplankton. We tested the relationship between the NND/SDNND and environmental factors, as well as the zooplankton biomass, using generalized linear models (GLMs). For cladocerans, including Bosmina, Ceriodaphnia and Daphnia, the NNDs were significantly correlated with the biomass, pond morphology (volume and depth), total phosphorous (TP) and fish presence. For copepod species, including Eodiaptomus and cyclopoids, NNDs were significantly correlated with pond morphology, TP and fish presence, but not with biomass. In GLMs of SDNND, significant correlated factors were less than those for NND, and for some species, pond morphology and TP were significantly correlated with SDNND. Here, we found that the NND and SDNND of zooplankton species were related to various factors, including their biomass, predator presence, pond size and water quality. For cladocerans, biomass may be supported by trophic niche breadth, probably because of the consequences of resource competition. Also, predation and ecosystem size may influence trophic niche breadth due to changes in zooplankton behaviours.

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Assessing the diet and trophic niche breadth of an omnivorous fish (Glanidium ribeiroi) in subtropical lotic environments: intraspecific and ontogenic responses to spatial variations

Marine and Freshwater Research ◽

10.1071/mf18149 ◽

2019 ◽

Vol 70 (8) ◽

pp. 1116 ◽

Cited By ~ 2

Author(s):

B. C. K. Kliemann ◽

M. C. Baldasso ◽

S. F. R. Pini ◽

M. C. Makrakis ◽

S. Makrakis ◽

...

Keyword(s):

Forest Cover ◽

Agricultural Land ◽

Niche Breadth ◽

Intraspecific Variability ◽

Niche Overlap ◽

Trophic Niche ◽

Main Channel ◽

Size Classes ◽

Intraspecific Variations ◽

Environmental Variations

The diet of Glanidium ribeiroi was investigated in lotic stretches downstream from a cascade of reservoirs to determine how it responds to intraspecific and environmental variations. Monthly sampling was performed from 2013 to 2016 at sites including the main channel of the Iguaçu River and tributaries in preserved basins and agricultural land. The diet of individuals in the preserved tributaries was primarily associated with allochthonous resources, whereas in the non-preserved tributaries and main channel the diets were primarily associated with autochthonous resources. Trophic niche breadth and intraspecific variability differed significantly among sampling areas and size classes. Trophic niche overlap among size classes and sampling areas was low. Positive and negative relationships between the trophic niche breadth and the standard length of individuals were also found in different sampling areas. Intraspecific and ontogenic variations were strongly and consistently associated with forest cover. Individuals responded differently to local environmental variations due to differences in landscape gradients and life cycle changes. Therefore, the effects of spatial heterogeneity on diet composition and intraspecific variations therein appear to be crucial to the success of the populations evaluated. These results may help with the implementation of conservation measures for this and other endemic species.

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Germination niche breadth and potential response to climate change differ among three North American perennials

Folia Geobotanica ◽

10.1007/s12224-019-09347-2 ◽

2019 ◽

Vol 54 (1-2) ◽

pp. 5-17 ◽

Cited By ~ 4

Author(s):

Ridma G. Bandara ◽

Jessamine Finch ◽

Jeffrey L. Walck ◽

Siti N. Hidayati ◽

Kayri Havens

Keyword(s):

Climate Change ◽

North American ◽

Niche Breadth ◽

Potential Response ◽

Germination Niche

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Trophic niche segregation allows range‐extending coral reef fishes to co‐exist with temperate species under climate change

Global Change Biology ◽

10.1111/gcb.14898 ◽

2019 ◽

Vol 26 (2) ◽

pp. 721-733 ◽

Cited By ~ 3

Author(s):

Kelsey M. Kingsbury ◽

Bronwyn M. Gillanders ◽

David J. Booth ◽

Ivan Nagelkerken

Keyword(s):

Climate Change ◽

Coral Reef ◽

Reef Fishes ◽

Trophic Niche ◽

Coral Reef Fishes ◽

Temperate Species ◽

Niche Segregation

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Pollen resources and trophic niche breadth of Apis mellifera and Melipona obscurior (Hymenoptera, Apidae) in a subtropical climate in the Atlantic rain forest of southern Brazil

Apidologie ◽

10.1007/s13592-013-0234-5 ◽

2013 ◽

Vol 45 (1) ◽

pp. 129-141 ◽

Cited By ~ 12

Author(s):

Suzane B. Hilgert-Moreira ◽

Carla Andrea Nascher ◽

Sidia Maria Callegari-Jacques ◽

Betina Blochtein

Keyword(s):

Apis Mellifera ◽

Rain Forest ◽

Niche Breadth ◽

Trophic Niche ◽

Atlantic Rain Forest ◽

Subtropical Climate ◽

Southern Brazil

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Diet of the toad Rhinella icterica (Anura: Bufonidae) from Atlantic Forest Highlands of southeastern Brazil

Biota Neotropica ◽

10.1590/s1676-06032012000400027 ◽

2012 ◽

Vol 12 (4) ◽

pp. 258-262 ◽

Cited By ~ 6

Author(s):

Leandro Talione Sabagh ◽

Ana Maria Paulino Telles Carvalho-e-Silva ◽

Carlos Frederico Duarte Rocha

Keyword(s):

Atlantic Forest ◽

National Park ◽

Niche Breadth ◽

Trophic Niche ◽

Southeastern Brazil ◽

Important Prey ◽

High Consumption ◽

Low Diversity ◽

Mouth Size ◽

Index Of Relative Importance

In this study, we present some information of the regarding throphic niche from the anuran toad Rhinella icterica living in high altitudes above 2000 m a.s.l. from a habitat of the Atlantic Forest Biome - the Altitude Fields in the Itatiaia National Park. We found 150 prey items in toad stomachs, belonging to five prey types, as well as skin remains and some remains of plant material. The index of relative importance indicated that most important prey types were beetles and ants, these last composing 70% of the diet numerically and the trophic niche breadth (B) was 1.81. The relatively low diversity of prey types we recorded in the diet of R. icterica of Itatiaia and numerically dominated by ants suggests some preference for this item. We do not found significant relationship between the toad measurements with the preys' measurements. We concluded that R. icterica toads at the highlands of Itatiaia feeds on arthropods, mainly ants and coleopterans and that the high consumption of preys with relatively small and similar size as ants in the diet prevents an expected relationship among frog body or mouth size and prey volume and size.

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Diet and ecomorphological relationships of an endemic, species-poor fish assemblage in a stream in the Iguaçu National Park

Neotropical Ichthyology ◽

10.1590/1982-0224-20140124 ◽

2015 ◽

Vol 13 (1) ◽

pp. 245-254 ◽

Cited By ~ 14

Author(s):

Mayara Pereira Neves ◽

Rosilene Luciana Delariva ◽

Luciano Lazzarini Wolff

Keyword(s):

Fish Assemblage ◽

National Park ◽

Aquatic Invertebrates ◽

Niche Breadth ◽

Stomach Contents ◽

Mantel Test ◽

Trophic Niche ◽

Low Levels ◽

Terrestrial Insects ◽

Trophic Niches

This study investigated the morphological and dietary relationships of the fish assemblage in a stream with an endemic fauna and low species richness. The ichthyofauna was sampled quarterly from September 2011 to July 2012, through the electrofishing technique. The stomach contents of 419 individuals belonging to seven species were analyzed by the volumetric method, and the ecomorphological traits of 30 specimens of each species were estimated. The main food items consumed were detritus, aquatic and terrestrial insects, and other aquatic invertebrates. We observed low levels of trophic niche breadth and diet overlap between most species. The PCA scores indicated the occurrence of three ecomorphotypes. PCA axis 1 segregated at one extreme, species with dorsoventrally depressed bodies, longer caudal peduncles, and well-developed swimming fins; and at the other extreme, species with compressed bodies and peduncles, and relatively larger eyes and anal fins. PCA axis 2 segregated species with elongated bodies and ventrally oblique mouths. The partial Mantel test revealed a significant correlation between diet and morphology, indicating independence from the phylogeny. The patterns observed suggest that the low richness did not result in a broadening of the species' trophic niches, or in the absence of some of the main ecomorphotypes expected.

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