![Chapter 4](http://s1.studyres.com/store/data/003725292_1-3e2567928496ab9c61d7ab235bf88fac-300x300.png)
Chapter 4
... to some stabilising mechanisms of coexistence, if the niche differentiation between two species is strong ...
... to some stabilising mechanisms of coexistence, if the niche differentiation between two species is strong ...
Submission to Draft threat abatement plan for predation by feral cats
... administrative and regulatory burden in undertaking feral cat control. While the intent of these requirements may be good (eg. avoiding human exposure to poisons, animal welfare outcomes), the requirements impos ...
... administrative and regulatory burden in undertaking feral cat control. While the intent of these requirements may be good (eg. avoiding human exposure to poisons, animal welfare outcomes), the requirements impos ...
Competitive Ability and Species Coexistence: A `Plant`s
... necessary to fully account for differences in fitness when resources are contested, they may all be necessary to define the intensity of natural selection resulting from competition. 'Intensity of competition' in this context therefore, is an experience of an individual and should not be confused wi ...
... necessary to fully account for differences in fitness when resources are contested, they may all be necessary to define the intensity of natural selection resulting from competition. 'Intensity of competition' in this context therefore, is an experience of an individual and should not be confused wi ...
General impacts of the feral pig (Sus scrofa) Rooting by pigs disturbs
... Rooting by pigs disturbs the seed bank, reduces surface vegetation and alters the soil by increasing soil temperature, increasing or decreasing the nitrogen content, increasing oxidation and increasing the leaching of Ca, P, Zn, Cu and Mg (Kotanen 1994, Singer Swank and Clebsch 1984, Arrington, Toth ...
... Rooting by pigs disturbs the seed bank, reduces surface vegetation and alters the soil by increasing soil temperature, increasing or decreasing the nitrogen content, increasing oxidation and increasing the leaching of Ca, P, Zn, Cu and Mg (Kotanen 1994, Singer Swank and Clebsch 1984, Arrington, Toth ...
pest risk assessment - Department of Primary Industries, Parks
... commercial display in zoos and recreational keeping, and are common to the global pet trade. They are able to be handled easily and are described as „docile and social‟, making them favourable pets for children. The Central bearded dragon is legally protected in all range jurisdictions of Australia ...
... commercial display in zoos and recreational keeping, and are common to the global pet trade. They are able to be handled easily and are described as „docile and social‟, making them favourable pets for children. The Central bearded dragon is legally protected in all range jurisdictions of Australia ...
A Game-Theoretic Model for Punctuated Equilibrium
... though genetic effects are still ignored. With a suitable bookkeeping method, the two definitions of species are equivalent.) However, we will also often distinguish species by the rate with which mutations occur. The more frequent type of mutation can only change phenotypes (i.e. here only the indiv ...
... though genetic effects are still ignored. With a suitable bookkeeping method, the two definitions of species are equivalent.) However, we will also often distinguish species by the rate with which mutations occur. The more frequent type of mutation can only change phenotypes (i.e. here only the indiv ...
Volume 13 - Utah Lepidopterists` Society!
... Understanding ecosystems and the impact of humans on them is crucial to the conservation and wise use of the natural resources found within them. Monitoring populations is one method that provides useful information to better understand the changes that occur within ecosystems. Because butterflies a ...
... Understanding ecosystems and the impact of humans on them is crucial to the conservation and wise use of the natural resources found within them. Monitoring populations is one method that provides useful information to better understand the changes that occur within ecosystems. Because butterflies a ...
biogeographical region
... “Case by case "phase (biogeographical region) • “Priority” criterion - at least one priority habitat or species • “Uniqueness” criterion - containing the only significant example of a non priority habitat or species • “High-quality” criterion - having a high national value for at least one nonpriori ...
... “Case by case "phase (biogeographical region) • “Priority” criterion - at least one priority habitat or species • “Uniqueness” criterion - containing the only significant example of a non priority habitat or species • “High-quality” criterion - having a high national value for at least one nonpriori ...
network topology and biodiversity loss in food webs: robustness
... fragility of the Scotch Broom web to removal of the most-connected species (the “Silwood Park” web, Solé and Montoya 2001). However, the Scotch Broom and Ythan Estuary webs are unusual among the 16 data sets in having very low connectance and very few (≤ 6%) basal taxa represented (12 of 13 other we ...
... fragility of the Scotch Broom web to removal of the most-connected species (the “Silwood Park” web, Solé and Montoya 2001). However, the Scotch Broom and Ythan Estuary webs are unusual among the 16 data sets in having very low connectance and very few (≤ 6%) basal taxa represented (12 of 13 other we ...
CLIMATE-RELATED TRANSBOUNDARY PESTS AND DISEASES
... geographical areas and from one region to another. It will also result in the emergence of new animal and plant diseases and pests. Change in climate resulting in changes in species composition will augment the emergence of unexpected events, including the emergence of new diseases and pests. The ad ...
... geographical areas and from one region to another. It will also result in the emergence of new animal and plant diseases and pests. Change in climate resulting in changes in species composition will augment the emergence of unexpected events, including the emergence of new diseases and pests. The ad ...
a review and synthesis1
... started in the mid-1970s, owing both to theoretical developments (Holt 1977) and to empirical investigations (e.g., Gilbert 1975; Ricklefs and O’Rourke 1975). Here, I review and synthesize the present state of knowledge regarding the role of enemies in the divergence and diversification of their pre ...
... started in the mid-1970s, owing both to theoretical developments (Holt 1977) and to empirical investigations (e.g., Gilbert 1975; Ricklefs and O’Rourke 1975). Here, I review and synthesize the present state of knowledge regarding the role of enemies in the divergence and diversification of their pre ...
Endangered Means There`s Still Time
... to begin laying eggs with shells so thin they often broke. ...
... to begin laying eggs with shells so thin they often broke. ...
EPBC Act Protected Matters Report
... Species or species habitat may occur within area Species or species habitat may occur within area Species or species habitat may occur within area Species or species habitat may occur within area Species or species habitat may occur within area Species or species habitat may occur within area Specie ...
... Species or species habitat may occur within area Species or species habitat may occur within area Species or species habitat may occur within area Species or species habitat may occur within area Species or species habitat may occur within area Species or species habitat may occur within area Specie ...
Insights into regional patterns of Amazonian forest structure
... (Ter Steege et al. 2003); on contrast, at a local scale, soil fertility seems to be inversely ...
... (Ter Steege et al. 2003); on contrast, at a local scale, soil fertility seems to be inversely ...
the vegetation history of snowdonia since the late glacial period
... During the late glacial period, as glaciers started to retreat, the ground became free of ice for the first time in many thousands of years; the exposed barren land of rocks and mineral sediments once again provided conditions for vegetation to develop. For many years, the area was exposed to arctic ...
... During the late glacial period, as glaciers started to retreat, the ground became free of ice for the first time in many thousands of years; the exposed barren land of rocks and mineral sediments once again provided conditions for vegetation to develop. For many years, the area was exposed to arctic ...
Species-rich ecosystems are vulnerable to cascading extinctions in an increasingly variable world
... (MacArthur 1972). One of the conditions for this criterion to be fulfilled is that species differ in their response to the environmental variability. On a similar note, it has been argued that intermediate intensity and frequency of disturbances might promote coexistence of competing species—the “in ...
... (MacArthur 1972). One of the conditions for this criterion to be fulfilled is that species differ in their response to the environmental variability. On a similar note, it has been argued that intermediate intensity and frequency of disturbances might promote coexistence of competing species—the “in ...
Spotted-tailed Quoll A vulnerable species
... sightings in rural areas adjoining potential Quoll habitat. REQUIRED MANAGEMENT ACTIONS Targeted feral animal control programs may benefit the Spotted-tailed Quoll through reduction of competition. However, due to the uncertainty about the uptake of poisoned baits by Quolls and the risk of secondary ...
... sightings in rural areas adjoining potential Quoll habitat. REQUIRED MANAGEMENT ACTIONS Targeted feral animal control programs may benefit the Spotted-tailed Quoll through reduction of competition. However, due to the uncertainty about the uptake of poisoned baits by Quolls and the risk of secondary ...
Evolution: the source of Earth`s biodiversity Genetic variation
... Evolution: the source of Earth’s biodiversity - Natural Selection = the process by which traits that enhance survival and reproduction are passed on more frequently to future generations than those that do not ...
... Evolution: the source of Earth’s biodiversity - Natural Selection = the process by which traits that enhance survival and reproduction are passed on more frequently to future generations than those that do not ...
Plant diversity in tropical forests: a review of mechanisms of species
... evident from non-random spatial distributions along micro-topographic gradients and from a survivorshipgrowth tradeoff during regeneration. Host-specific pests reduce recruitment near reproductive adults (the JanzenConnell effect), and, negative density dependence occurs over larger spatial scales a ...
... evident from non-random spatial distributions along micro-topographic gradients and from a survivorshipgrowth tradeoff during regeneration. Host-specific pests reduce recruitment near reproductive adults (the JanzenConnell effect), and, negative density dependence occurs over larger spatial scales a ...
Moving beyond assumptions to understand abundance distributions
... Caughley et al. [20], for example, layered geographically scaled observations on population density, ‘growth rates and’ ‘well-being’ of individuals, or physiological performance to identify the causes of range limits in terrestrial mammals. Their framework, which simplified clines in variables from ...
... Caughley et al. [20], for example, layered geographically scaled observations on population density, ‘growth rates and’ ‘well-being’ of individuals, or physiological performance to identify the causes of range limits in terrestrial mammals. Their framework, which simplified clines in variables from ...
Fulltext PDF - Indian Academy of Sciences
... By definition, speciation is the production of new daughter species. For some, speciation means transformation of one species to another (phyletic speciation), an idea championed by Lamarck which is also known as vertical tradition. For others led by Darwin (horizontal tradition), speciation implies ...
... By definition, speciation is the production of new daughter species. For some, speciation means transformation of one species to another (phyletic speciation), an idea championed by Lamarck which is also known as vertical tradition. For others led by Darwin (horizontal tradition), speciation implies ...
Native Habitats for Monarch Butterflies in South Florida
... host plants for larvae than on nectar plants for adults, so protecting larval hosts is a higher priority for butterfly conservation than is protecting the nectar plants that appear in many butterfly gardens. The monarch’s larval host plant is the milkweed (genus Asclepias), of which there are more t ...
... host plants for larvae than on nectar plants for adults, so protecting larval hosts is a higher priority for butterfly conservation than is protecting the nectar plants that appear in many butterfly gardens. The monarch’s larval host plant is the milkweed (genus Asclepias), of which there are more t ...
Ecological niche , , Jitka Polechov amp David Storch Department of
... reason is that ecology is about interactions between organisms, and if persistence of a species is determined by the presence of other species food sources, competitors, predators, etc., all species are naturally both affected by environment, and at the same time affect the environment for other spe ...
... reason is that ecology is about interactions between organisms, and if persistence of a species is determined by the presence of other species food sources, competitors, predators, etc., all species are naturally both affected by environment, and at the same time affect the environment for other spe ...
Ecological niche - Biomathematics and Statistics Scotland
... favourable conditions determined by all environmental (abiotic and biotic) variables where the species can reproduce and survive, and the realized niche, which is a subset of the abstract fundamental niche, where the species can persist given the presence of other species competing for the same reso ...
... favourable conditions determined by all environmental (abiotic and biotic) variables where the species can reproduce and survive, and the realized niche, which is a subset of the abstract fundamental niche, where the species can persist given the presence of other species competing for the same reso ...
predation on speared red lionfish, pterois volitans, by spotted moray
... Understanding predation pressures on red lionfish in the western Atlantic Ocean is of great significance given the rapid growth of this invasive species and its potential effects on populations of coral reef fish. This important problem is exacerbated by the fact that top predators have largely been ...
... Understanding predation pressures on red lionfish in the western Atlantic Ocean is of great significance given the rapid growth of this invasive species and its potential effects on populations of coral reef fish. This important problem is exacerbated by the fact that top predators have largely been ...
Introduced species
![](https://commons.wikimedia.org/wiki/Special:FilePath/Melilotus_alba_bgiu.jpg?width=300)
An introduced, alien, exotic, non-indigenous, or non-native species, or simply an introduction, is a species living outside its native distributional range, which has arrived there by human activity, either deliberate or accidental. Non-native species can have various effects on the local ecosystem. Introduced species that become established and spread beyond the place of introduction are called invasive species. Some have a negative effect on a local ecosystem. Some introduced species may have no negative effect or only minor impact. Some species have been introduced intentionally to combat pests. They are called biocontrols and may be regarded as beneficial as an alternative to pesticides in agriculture for example. In some instances the potential for being beneficial or detrimental in the long run remains unknown. A list of some introduced species is given in a separate article.The effects of introduced species on natural environments have gained much scrutiny from scientists, governments, farmers and others.