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Topic: Ecological niche

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In the News (Fri 24 Nov 17)

Ecological psychotherapy strives to understand behavior not only as a function of the person, as have a host of intrapersonal schools including the psychoanalytic, person centered, and cognitive-behavioral schools, or of environmental conditions, as have behavioral theorists, but as a function of their reciprocal interaction within nested social systems.
Ecological treatment planning entails crafting a plan for facilitating the client's use of personal strength to achieve a better fit within his or her ecological niche.
Ecological psychotherapeutic principles also enrich the constructivist, cybernetic view of systemic family therapy increasing awareness of relationship motivations which led to the original selection of the partner with whom the client is now experiencing interactive ineffectiveness and coevolutionary failure.
www.uc.edu /counselingprogram/ecological_psychotherapy.htm   (1093 words)

  NationMaster - Encyclopedia: Ecological niche
The term 'Niche' was coined by the naturalist Joseph Grinnell in 1917, in his paper "The niche relationships of the California Thrasher." However, it wasn't until 1927 that Charles Sutherland Elton, a British ecologist, gave the first working definition of the niche concept.
Ecological psychotherapy strives to understand behavior not only as a function of the person, as have a host of intrapersonal schools including the psychoanalytic, person centered, and cognitive-behavioral schools, or of environmental conditions, as have behavioral theorists, but as a function of their reciprocal interaction within nested social systems.
Ecological treatment planning entails crafting a plan for facilitating the client's use of personal strength to achieve a better fit within his or her ecological niche.
www.nationmaster.com /encyclopedia/Ecological-niche   (1072 words)

 Niche - EvoWiki
He devised a niche concept that was based on the role of a species in its environment in terms of its position within a food-web (Elton, 1927).
The niche according to Hutchinson could be divided into two facets; the realized niche which is the sum of a species niche dimensions that are unique to that particular species (if any) and the fundamental niche, which is the totality of a species niche dimensions, both shared with other species and unshared.
Hutchinsonian niche theory however, as has already been mentioned, precludes the possibility of vacant niches existing as in order for there to be a Hutchinsonian niche, there needs to be a species to define it in the first place.
wiki.cotch.net /index.php/Niche   (949 words)

 ecological niche – Dictionary Definition of ecological niche | Encyclopedia.com: FREE Online Dictionary
Cephalopods occupy the ecological niche of epipelagic fish in the Antarctic Polar Frontal Zone.
Ecological polarities of mid-Cenozoic fossil plants and animals from central Oregon
A perspective on ecological considerations in crawfish pond aquaculture.
www.encyclopedia.com /doc/1O87-ecologicalniche.html   (845 words)

 PLoS ONE: Ecological Niche and Geographic Distribution of Human Monkeypox in Africa
We define the ecological niche of a species as the set of environmental conditions within which it is able to maintain populations without immigration [18], [19].
Ecological niches and associated potential geographic distributions can be approximated via correlative approaches that relate known point-occurrence data to digital GIS data layers summarizing spatial variation in relevant environmental dimensions [20].
To permit visualization of ecological niches of various sets of occurrences analyzed, we related the geographic projection of the ENMs to the original environmental data layers to reconstruct ecological variation across the landscape and the conditions under which the species was predicted to be able to occur.
www.plosone.org /article/info:doi/10.1371/journal.pone.0000176   (4306 words)

 Niche - CreationWiki, the encyclopedia of creation science
Niche or an organisms ecological niche is the smallest unit of a specific habitat or ecosystem that is inhabited.
It is as if the environment or ecosystem is the residence and the ecological niche is the organisms many jobs or actions that make it very competitive within that environment.
It's ecological niche, or jobs are photosynthesis, as well as absorbtion of water and important minerals from the soil it is planted in.
creationwiki.org /Ecological_niche   (132 words)

 Notes on the development of cultural ecology
A Niche is the place of a group in its total environment, including its relations to resources and to other occupants of that environment.
Sees the niche as hyperspace, a theoretical space defined or delimited by the dimensions of the resources which determine their use by an organism (shape, size, color of resource are all factors).
The human ecological niche is composed of microenvironments.
www.indiana.edu /~wanthro/eco.htm   (2050 words)

 Wikinfo | Niche   (Site not responding. Last check: )
The niche in classical architecture is an exedra or an apse that has been reduced in size, retaining the half-dome heading usual for an apse.
Though a niche in either Classical or Gothic context may be empty and merely provide some articulation and variety to a section of wall, the cult origins of the niche suggested that it be filled with a statue.
In ecology, a niche would be the position occupied by an organism (or group of organisms) within an ecosystem or the conditions making possible a habitat.
www.wikinfo.org /wiki.php?title=niche   (580 words)

 Conservatism of Ecological
Reciprocal geographic predictions based on ecological niche models of sister taxon pairs of birds, mammals, and butterflies in southern Mexico indicate niche conservatism over several million years of independent evolution (between putative sister taxon pairs) but little conservatism at the level of families.
Based on large-scale ecological dimensions, the approach uses a genetic algorithm to produce a set of decision rules in ecological space (a model of the fundamental niche) that can be projected onto map to predict potential geographic distributions.
To evaluate relative degrees of conservatism of ecological niches of sister taxa, we compared the reciprocally predictive accuracy of sister taxon pairs with that for randomly chosen nonsister taxa within the same family.
www.ibiologia.unam.mx /vscscience/completo.html   (1921 words)

 Niche Construction - The Neglected Process In Evolution   (Site not responding. Last check: )
By transforming both biotic and abiotic sources of natural selection in external environments, niche construction generates feedback in evolution, on a scale hitherto underestimated, and in a manner that transforms the evolutionary dynamic, and modifies the processes of adaptation.
However, as we point out, the generality and significance of niche construction are not yet sufficiently appreciated, in either contemporary evolutionary biology, or in ecology, probably because it is not possible to fully understand, or model, the consequences of niche construction within the framework provided by standard evolutionary theory.
Nor can the consequences of niche construction be sufficiently understood in terms of either of the two principal contemporary approaches to ecosystem ecology, process-functional ecology, and population-community ecology.
www.st-andrews.ac.uk /~seal/niche/bookoverview.html   (770 words)

 Ecological Niches
The Ecological Niche of an organism describes how that particular individual "fits" into its ecosystem.
In other words, a niche is the role that the individual organism plays in its nonliving and living environment.
Ecological niches are crucial in determining the effects of extinction, migration, environmental degradation on an ecosystem.
library.thinkquest.org /28343/econiche.html   (139 words)

 [No title]
Even though the lizard niche is multidimensional and complex, it may eventually prove to be possible to construct a "periodic table of lizard niches" in a space of moderately low dimensionality.
The ecological niche is defined as the sum total of the adaptations of an organismic unit, or as all of the various ways in which a given organismic unit conforms to its particular environment (Pianka 1974).
Microhabitat niche breadths are, on average, broadest in the Kalahari, narrowest in North America, and intermediate in Australia.
uts.cc.utexas.edu /~varanus/lacertids1.html   (3621 words)

 Niche Conservatism: by Nicholas Friedenberg
Some researchers, however, have trained their theory and their naturalist's eye on an overlooked phenomenon called niche conservatism, the absence of niche expansion or adaptive radiation over time.
Known as phylogenetic niche conservatism to biologists that study speciation, the failure of organisms to adapt to conditions outside their ancestral niche may play as important a role in the structure and distribution of ecological communities as evolution's more oft-cited successes.
Although the population displays niche conservatism at a large temporal scale, its genetic composition changes over the life of a single cohort.
www.archidictus.org /theory/niche.conservatism.html   (571 words)

 Ecological Niche
The ecological niche is not a notion of quantitative population ecology despite of several attempts to define it quantitatively.
Elton (1927) described the niche as the function performed by the species in the community of which it is a member.
However, this kind of statements should be accepted with caution because: (1) measurement of niche volume is a subjective procedure, (2) some important dimensions of the niche may be not known, (3) niches change in the life-cycle, (4) niches change from one geographical region to another.
www.gypsymoth.ento.vt.edu /~sharov/PopEcol/lec11/niche.html   (205 words)

 Niches and Resources
This view of a niche was formalized by Hutchinson; the "Hutchinsonian niche" is defined as a "multidimensional hypervolume" of all requirements of a species in its environment.
This range of conditions is typically narrower than those described by the fundamental niche because there are many sets of abiotic conditions and resources within which a species could occur but does not because it is kept out of them by biotic factors such as competitors, predators, or parasites.
It is predicted that we will not see two species in the community with exactly the same ecological niche; if two species had the same niche, they would be in such strong competition that whichever was a little better would drive the other extinct (this is called competitive exclusion).
www.utm.edu /departments/cens/biology/rirwin/441_442/441Niches.htm   (787 words)

 Summary "Ontology development and integration for the biosciences"
The ecological niche and its underlying structure were formalised in FOL and most concepts within the niche could be classified using the DOLCE ontological categories.
The applicability of the underlying abstraction of the model was illustrated with an examination of the ecological niche concept in detail and two brief outlines were provided to demonstrate the potential of the devised extended abstraction of the niche structure outside the domain of biology.
The niche being an integrative concept with alternative hypotheses and points of view, affected development particularly concerning decisions on what, and what not, to include and to choose for a formal representation to specify the theory more precisely in order to elicitate these subtle differences.
www.meteck.org /sumOntDevBio.html   (1037 words)

 The ecosystems
Two concepts in relation with the one of ecosystem are the one of habitat and the one of ecological niche.
The ecological niche is the way in which an organism is related to the biotic and abiotic factors of its environment.
The ecological succession is the replacement of some elements of the ecosystem by others in the course of the time.
www.barrameda.com.ar /ecology/the-ecosystem.htm   (1053 words)

As defined by ecologists today the ecological niche is the sum of all of the parameters in which an organism can survive and reproduce.
During the early twentieth century, when the field of ecology was young, the term niche was frequently defined as the habitat or the role of an organism.
If one population has a broad niche with respect to a particular resource (say food sources of size A, B and C) then individuals best adapted for one end of the range (size A) will tend to gravitate towards that space.
groups.msn.com /EvolutionVCreation/theecologicalniche.msnw   (920 words)

 Ecological Niche
The concept of the ecological niche is an important one; it helps us to understand how organisms in an ecosystem interact with each other.
By analogy, it may be said that the habitat is the organism's "address", and the niche is its "profession", biologically speaking.
These six things are the "profession" or ecological niche of the oak tree; you can think of it as being a kind of job description.
www.purchon.com /ecology/niche.htm   (409 words)

 9(g) Concept of Ecological Niche
G.E. Hutchinson (1958) suggested that the niche could be modeled as an imaginary space with many dimensions, in which each dimension or axis represents the range of some environmental condition or resource that is required by the species.
Thus, the niche of a plant might include the range of temperatures that it can tolerate, the intensity of light required for photosynthesis, specific humidity regimes, and minimum quantities of essential soil nutrients for uptake.
The fundamental niche of a species includes the total range of environmental conditions that are suitable for existence without the influence of interspecific competition or predation from other species.
www.physicalgeography.net /fundamentals/9g.html   (297 words)

 Freshwater Solutions
Ecological Aquaculture Designs can be provided after full site evaluations, to provide specific and individually tailored-made systems.
This 'Practical Ecological Aquaculture Manual' (which includes two AIDGAP freshwater identification guides), lays down the essentials of an ecological approach to, and a vision of aquaculture, practicle site and habitat evaluation, modelling, design, installation, production, maintenance and management on any scale, from small, backyard, operations to larger commercial enterprises.
It has emerged as a defining study in its field and as such is certain to be recognised as the benchmark work in the developing enterprise of a more ecological approach to sustainable freshwater aquaculture.
www.ecological-aquaculture.co.uk /product.cfm   (401 words)

 The Ecological Niche
The niche is that in relation to which the animal is habituated in its behavior.
For Gibson's ecological perspective is in other respects however very close to the phenomenological theories of the life world referred to above, theories which have been held to dictate precisely a representationalist reading.
We are concerned, rather, with the ontological underpinnings of the ecological theories of Gibson and Barker, a detailed formal treatment of which is to be found in Smith and Varzi 1999.
ontology.buffalo.edu /smith/articles/husserlianecology.html   (7458 words)

 Urban Biomes – An Ecological Niche For Potential Hantavirus Vectors
With the constant expansion of the anthrosphere (those habitats occupied by humans), biological and ecological diversity are severely adversely impacted.
Ecological integrity is threatened when the urban developmental process refuses to subscribe to the earth wisdom view.
The urbanization of natural biomes becomes an ecotone between anthropogenic processes and population ecology which redefines the fundamental niche of species and to some degree, their trophic level.
www.wms.org /biod/ERIDs/Mitchell_hanta1.html   (667 words)

 Niche Ecological - Search Results - MSN Encarta
Niche Ecological - Search Results - MSN Encarta
Niche, Ecological, environmental range, for all features of the environment, within which or on which the members of a species can survive and...
The community provides the habitat—the place where particular plants or animals live.
uk.encarta.msn.com /Niche_Ecological.html   (97 words)

 PLoS ONE: Locating Pleistocene Refugia: Comparing Phylogeographic and Ecological Niche Model Predictions
Ecological niche models (ENMs) provide a means of characterizing the spatial distribution of suitable conditions for species, and have recently been applied to the challenge of locating potential distributional areas at the Last Glacial Maximum (LGM) when unfavorable climate conditions led to range contractions and fragmentation.
Similarly, under assumptions of niche conservatism [22], which have been tested extensively [23]–[26], ENMs can be projected onto paleoclimate reconstructions to identify past potential distributions [19], [26]–[27].
Considerable debate exists regarding the degree to which niche models capture these interaction effects and the degree to which interaction effects may disrupt predictivity over space and time [21]–[22], [48]–[49].
www.plosone.org /doi/pone.0000563   (7600 words)

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