Estimating the fundamental niche: Accounting for the uneven availability of existing climates in the calibration area

2022 ◽  
Vol 464 ◽  
pp. 109823
Author(s):  
L. Jiménez ◽  
J. Soberón
Keyword(s):  
Fundamental Niche

scholarly journals Survival and osmoregulation of the purple marsh crab (Sesarma reticulatum) at varying salinity and pH

2017 ◽  
Vol 95 (12) ◽  
pp. 985-989 ◽  
Author(s):  
C.A. Shaughnessy ◽  
E.C. Anderson ◽  
M. Kasparian ◽  
J.M. LaMontagne ◽  
J.S. Bystriansky
Keyword(s):  
South Carolina ◽  
Salt Marshes ◽  
Trophic Cascade ◽  
Western Atlantic ◽  
Fundamental Niche ◽  
Ion Concentrations ◽  
Physiological Tolerance ◽  
Physiological Limits ◽  
Top Predators ◽  
Sesarma Reticulatum

Overfishing of top predators along the western Atlantic coastline has led to a trophic cascade in salt marshes, with increases in herbivorous purple marsh crab (Sesarma reticulatum (Say, 1817)) abundances in North American estuaries leading to overgrazing of cordgrass (Spartina alterniflora Loisel.) and shoreline erosion. To evaluate potential physiological limits on the range of S. reticulatum within an estuary, we evaluated survival and physiological tolerance of S. reticulatum from the Ashepoo–Combhee–Edisto (ACE) River Basin in South Carolina, USA, to combinations of salinity (5‰ and 30‰) and pH (pH 6.6, 7.6, and 8.6) challenges, representative of estuarine extremes. Survival, haemolymph ion concentrations, and gill Na+,K+-ATPase (NKA) and vacuolar-type H+-ATPase (VHA) activity were measured after a 48 h exposure to each experimental condition. Survival was nearly 100% and osmoregulatory control was maintained across estuarine salinity and pH ranges. Sesarma reticulatum appeared to be robust to all potential combinations of salinity and pH stressors examined in this study, and therefore are likely unrestricted in their fundamental niche based on these stressors throughout an estuary.

scholarly journals Shape and evolution of the fundamental niche in marine Vibrio

2012 ◽  
Vol 6 (12) ◽  
pp. 2168-2177 ◽  
Author(s):  
Arne C Materna ◽  
Jonathan Friedman ◽  
Claudia Bauer ◽  
Christina David ◽  
Sara Chen ◽  
...  
Keyword(s):  
Fundamental Niche ◽  
Marine Vibrio

Ecological comments on the intestinal helminths of the rabbitfish Siganus rivulatus (Teleostei, Siganidae) from the northern Red Sea

2007 ◽  
Vol 52 (3) ◽  
Author(s):  
Reda Hassanine ◽  
Mohammed Al-Jahdali
Keyword(s):  
Red Sea ◽  
Parasite Species ◽  
Intestinal Helminths ◽  
Fundamental Niche ◽  
Concurrent Infections ◽  
Size Groups ◽  
South Sinai ◽  
Siganus Rivulatus ◽  
Partial Overlap ◽  
Northern Red Sea

AbstractBetween May and September 2006, 640 specimens of the rabbitfish Siganus rivulatus Forsskål (Teleostei, Siganidae) were examined for infections with intestinal helminths. These fishes were caught in the Red Sea off the coast of Sharm El-Sheikh, South Sinai, Egypt, examined in a field laboratory and separated into three size groups of regular length intervals. Only three species of helminths were recovered: the trematode Gyliauchen volubilis Nagaty, 1956 (Gyliauchenidae Fukui, 1929), the acanthocephalan Sclerocollum rubrimaris Schmidt et Paperna, 1978 (Cavisomidae Meyer, 1932) and the nematode Procamallanus elatensis Fusco et Overstreet, 1979 (Cucullanidae Cobbold, 1864). The distribution of these helminths along the intestine of S. rivulatus, in all patterns of single and concurrent infections and the corresponding prevalences and intensities of infection in the different size groups of the fish were recorded. In single infections, each parasite species was found distributed in a well-defined fundamental niche along the intestine of Siganus rivulatus, and a distinct partial overlap between the niches of G. volubilis and Sclerocollum rubrimaris was observed. In concurrent infections with these two species, their fundamental niches were significantly reduced, probably being affected by interactive site segregation and individuals of each species were found segregated in a restricted realised niche. In all other patterns of concurrent infections, each parasite species was normally found in its original fundamental niche. The prevalences of these parasites in the fish examined were relatively low and somewhat similar. In all patterns of single and concurrent infections, the intensity of infection was directly related to fish size. In concurrent infection with G. volubilis and S. rubrimaris, a significant decline was observed in the intensities of both species in the different size groups of the fish, but, in all other patterns of concurrent infections, no significant change in intensity was observed. These observations suggest that the interaction between G. volubilis and S. rubrimaris is probably a negative and symmetrical one. The mode of transmission of these parasites to the fish is also discussed.

How Does Nutrition Structure Ecosystems?

2012 ◽  
Author(s):  
Stephen J. Simpson ◽  
David Raubenheimer
Keyword(s):  
Evolutionary Ecology ◽  
Ecosystem Dynamics ◽  
Trophic Levels ◽  
Nutritional Requirements ◽  
Ecological Communities ◽  
Geometric Framework ◽  
Agent Based ◽  
Fundamental Niche ◽  
Biophysical Ecology ◽  
Ecology Of Nutrition

This chapter assesses the consequences of individual nutrition for populations and the assemblages of species that comprise ecological communities. However, the ecological consequences of nutrition are not restricted to the effects of diet on individual organisms but include as well the direct and indirect interactions occurring among individuals within populations and between species. Understanding the complex network of interactions that produce food webs and structure ecosystem dynamics requires the understanding of the participants' differing nutritional requirements, priorities, and regulatory capacities. Geometric Framework analyses have shown that these features differ between species and across trophic levels. Nutritional space is one part of the fundamental niche of an organism, and there is a need to integrate nutrition with the biophysical ecology of organisms. Evolutionary processes also need to be taken into account, and agent-based models offer promise toward development of a new understanding of the evolutionary ecology of nutrition.

scholarly journals Fundamental Flaws with the Fundamental Niche

2019 ◽  
Vol 59 (4) ◽  
pp. 1038-1048 ◽  
Author(s):  
Michael J Angilletta ◽  
Michael W Sears ◽  
Ofir Levy ◽  
Jacob P Youngblood ◽  
John M VandenBrooks
Keyword(s):  
Spatial Configuration ◽  
Life Stage ◽  
Spatiotemporal Variation ◽  
Mechanistic Models ◽  
Ecological Research ◽  
Ample Evidence ◽  
Abiotic Conditions ◽  
Fundamental Niche ◽  
And Performance ◽  
Stress Influence

Abstract For more than 70 years, Hutchinson’s concept of the fundamental niche has guided ecological research. Hutchinson envisioned the niche as a multidimensional hypervolume relating the fitness of an organism to relevant environmental factors. Here, we challenge the utility of the concept to modern ecologists, based on its inability to account for environmental variation and phenotypic plasticity. We have ample evidence that the frequency, duration, and sequence of abiotic stress influence the survivorship and performance of organisms. Recent work shows that organisms also respond to the spatial configuration of abiotic conditions. Spatiotemporal variation of the environment interacts with the genotype to generate a unique phenotype at each life stage. These dynamics cannot be captured adequately by a multidimensional hypervolume. Therefore, we recommend that ecologists abandon the niche as a tool for predicting the persistence of species and embrace mechanistic models of population growth that incorporate spatiotemporal dynamics.

Optimal niche space of the redwinged blackbird (Agelaius phoeniceus). I. Nesting success in marsh and upland habitat

1972 ◽  
Vol 50 (2) ◽  
pp. 247-263 ◽  
Author(s):  
Raleigh J. Robertson
Keyword(s):  
Nesting Success ◽  
Predation Pressure ◽  
Agelaius Phoeniceus ◽  
Breeding Density ◽  
Niche Space ◽  
Fundamental Niche ◽  
Nesting Density ◽  
Different Parts

Survival value of different parts of the fundamental niche of the redwinged blackbird was determined by comparing nesting success in marsh and upland habitats. Marsh nesting populations had greater success than those in uplands because of a smaller proportion of nests destroyed by predators. Predation pressure in marshes was negatively correlated with the depth of water beneath the nest, and the synchrony and density of nesting in marshes in some cases has a swamping effect on local predator populations. The structure and phenology of marsh compared with upland vegetation is an important factor in determining nesting density and synchrony.Growth rates of nestlings and weight at fledging are similar between habitats. Genetic separation between marsh and upland populations is unlikely. Territoriality probably results in a limitation to breeding density in both habitats.The results support the hypothesis that where sympatric, redwings are excluded from their optimal niche space by yellow-headed blackbirds.

Living on the edge—Modelling habitat suitability for species at the edge of their fundamental niche

2008 ◽  
Vol 214 (2-4) ◽  
pp. 153-167 ◽  
Author(s):  
Veronika Braunisch ◽  
Kurt Bollmann ◽  
Roland F. Graf ◽  
Alexandre H. Hirzel
Keyword(s):  
Habitat Suitability ◽  
Fundamental Niche
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