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... Achatina fulica has been widely introduced throughout the tropics and subtropics. After introduction, its populations generally increase dramatically, perhaps following a variable lag time, as seen in many other introductions of non-native species (Crooks and SouleÂ, 1996; Ewel et al., 1999). They f ...
... Achatina fulica has been widely introduced throughout the tropics and subtropics. After introduction, its populations generally increase dramatically, perhaps following a variable lag time, as seen in many other introductions of non-native species (Crooks and SouleÂ, 1996; Ewel et al., 1999). They f ...
Alien Marine Invertebrates of Hawaii
... The greatest number of introduced marine invertebrates have arrived to Hawaii through hull fouling, but many have also arrived with solid ballast and in ballast water. We consider 201 species (70%) to be introduced, and 86 species (30%) cryptogenic (not demonstratively native or introduced). Two hun ...
... The greatest number of introduced marine invertebrates have arrived to Hawaii through hull fouling, but many have also arrived with solid ballast and in ballast water. We consider 201 species (70%) to be introduced, and 86 species (30%) cryptogenic (not demonstratively native or introduced). Two hun ...
... The spread of invasive species is considered one of the most serious threats to the loss of biodiversity (Vitousek et al., 1996), and the economic impact of invasive species is estimated to range from millions to billions of dollars annually (Pimentel et al., 2000). Invasive species have had and wil ...
NatureServe HCCVI and Adaptation Strategies
... Mojave Desert. The increased aridity from additional evapo-transpiration will likely cause decline in vegetation cover especially at the lower, hotter elevation sites. The model results also indicate a 0.9 inch (0.3-3.0 inch) increase in mean precipitation in August for the Spring Mountains and othe ...
... Mojave Desert. The increased aridity from additional evapo-transpiration will likely cause decline in vegetation cover especially at the lower, hotter elevation sites. The model results also indicate a 0.9 inch (0.3-3.0 inch) increase in mean precipitation in August for the Spring Mountains and othe ...
Reprint (1.8MB PDF) - Litchman-Klausmeier Lab
... Abrams et al., 2012). Typically, coexistence models focus on a few (often two) species with static traits (or phenotypes). In reality, however, a continuous range of species trait values may be accessible through both evolutionary (standing genetic variation and novel mutation) and ecological (dispe ...
... Abrams et al., 2012). Typically, coexistence models focus on a few (often two) species with static traits (or phenotypes). In reality, however, a continuous range of species trait values may be accessible through both evolutionary (standing genetic variation and novel mutation) and ecological (dispe ...
Deep-sea ecosystem: a world of positive biodiversity – ecosystem
... Furthermore, it has also been suggested that functional diversity, rather than species richness, was a ...
... Furthermore, it has also been suggested that functional diversity, rather than species richness, was a ...
Bulletin of the College of Science, University of the Ryukyus
... Chthamalus monlagui, Balanus balanoides and Elminius modestus, which were attached to the Mytilus shells, and the small bivalve Lasaea rubra. ...
... Chthamalus monlagui, Balanus balanoides and Elminius modestus, which were attached to the Mytilus shells, and the small bivalve Lasaea rubra. ...
Experimental Manipulation of Grassland Plant Diversity Induces
... food spectrum they should be negatively affect by increasing plant species richness, as the density of the respective food resource decreases at higher species richness (‘food plant dilution effect’) [15]. As a result the expected increase in consumer species richness together with the decline in do ...
... food spectrum they should be negatively affect by increasing plant species richness, as the density of the respective food resource decreases at higher species richness (‘food plant dilution effect’) [15]. As a result the expected increase in consumer species richness together with the decline in do ...
Feeding Relationships and Symbiosis
... interact with one anther • 7th - Life #2 - Investigate how organisms or populations may interact with one another through symbiotic relationships and how some species have become so adapted to each other that neither could survive without the other (e.g. Predatorprey, parasitism, mutualism and comme ...
... interact with one anther • 7th - Life #2 - Investigate how organisms or populations may interact with one another through symbiotic relationships and how some species have become so adapted to each other that neither could survive without the other (e.g. Predatorprey, parasitism, mutualism and comme ...
A Case Study in Concept Determination: Ecological Diversity.
... diversity, such as Shannon’s and Simpson’s, that make no assumption about the underlying distribution of individual organisms among species in a community. For this reason, these indices are sometimes called nonparametric (e.g. [Lande, 1996]) to distinguish them from indices derived from parameters ...
... diversity, such as Shannon’s and Simpson’s, that make no assumption about the underlying distribution of individual organisms among species in a community. For this reason, these indices are sometimes called nonparametric (e.g. [Lande, 1996]) to distinguish them from indices derived from parameters ...
EXPERIMENTAL TESTS OF EFFECTS OF PLANT PRODUCTIVITY AND E S
... influence the diversity of trophic levels higher up the food chain (‘‘bottom-up’’ control of diversity). Increasing plant productivity may increase herbivore diversity by: increasing the abundance of rare resources (‘‘resource rarity hypothesis’’), increasing herbivore abundance and local persistenc ...
... influence the diversity of trophic levels higher up the food chain (‘‘bottom-up’’ control of diversity). Increasing plant productivity may increase herbivore diversity by: increasing the abundance of rare resources (‘‘resource rarity hypothesis’’), increasing herbivore abundance and local persistenc ...
Feral Cats - Parliament of Tasmania
... threat to seven nationally threatened species and as a perceived threat to a further 31 nationally threatened species. The Threat Abatement Plan for Predation by Feral Cats can be viewed on the Internet at: http://www.environment.gov.au/biodiversity/threatened/publications/tap/cats08.html. The Tasma ...
... threat to seven nationally threatened species and as a perceived threat to a further 31 nationally threatened species. The Threat Abatement Plan for Predation by Feral Cats can be viewed on the Internet at: http://www.environment.gov.au/biodiversity/threatened/publications/tap/cats08.html. The Tasma ...
Download Niche partitioning based on diet analysis of three introduced rodents in Hawaiian montane forest
... Drake and Hunt 2009). Introduced rodents may consume a wide variety of prey, including plants (e.g., fruits, seeds, vegetative material) and animals (e.g., arthropods, mollusks, birds; Sugihara 1997; Campbell and Atkinson 2002; Stapp 2002), and their diets can shift depending upon a number of facto ...
... Drake and Hunt 2009). Introduced rodents may consume a wide variety of prey, including plants (e.g., fruits, seeds, vegetative material) and animals (e.g., arthropods, mollusks, birds; Sugihara 1997; Campbell and Atkinson 2002; Stapp 2002), and their diets can shift depending upon a number of facto ...
Get PDF - Wiley Online Library
... not explore or test possible mechanisms in detail. Crucially, this depends on temperature–body size effects at those levels being in agreement. The analyses of Daufresne et al. (2009) are far-reaching and compelling, but the true universality and the underlying mechanisms behind the effects they des ...
... not explore or test possible mechanisms in detail. Crucially, this depends on temperature–body size effects at those levels being in agreement. The analyses of Daufresne et al. (2009) are far-reaching and compelling, but the true universality and the underlying mechanisms behind the effects they des ...
Hibernation and daily torpor minimize mammalian extinctions
... mammals capable of employing torpor to drastically reduce their energy and water requirements during unfavorable conditions will stand a better chance of survival. Indeed, torpor is a particularly common adaptation of species in regions of low productivity and unpredictable but relatively warm clima ...
... mammals capable of employing torpor to drastically reduce their energy and water requirements during unfavorable conditions will stand a better chance of survival. Indeed, torpor is a particularly common adaptation of species in regions of low productivity and unpredictable but relatively warm clima ...
Forest Restoration Ecology - College of Tropical Agriculture and
... Forest Restoration Ecology • Restoration planning steps (SER) 1) Clear rationale as to why restoration is needed 2) Ecological description of the site to be restored 3) Statement of goals & objectives of the restoration project 4) Designation & description of the reference system 5) Explanation of ...
... Forest Restoration Ecology • Restoration planning steps (SER) 1) Clear rationale as to why restoration is needed 2) Ecological description of the site to be restored 3) Statement of goals & objectives of the restoration project 4) Designation & description of the reference system 5) Explanation of ...
Biodiversity, Stability, and Productivity in Competitive Communities
... covariance is positive, then the two species tend to increase and decrease together. If negative, one species tends to increase when the other decreases. If 0, then neither case is true—for example, they vary independently or do not vary. Thus, covariance provides a measure of species interactions, ...
... covariance is positive, then the two species tend to increase and decrease together. If negative, one species tends to increase when the other decreases. If 0, then neither case is true—for example, they vary independently or do not vary. Thus, covariance provides a measure of species interactions, ...
UNCORRECTED PROOF Frog community responses to recent
... Liu and Li, 2009). Bullfrogs prefer larger permanent still waters such as ponds or reservoirs and breed from early spring through late summer (Bruneau and Magnin, 1980; Bury and Whelan, 1984; Shirose and Brooks, 1995; Wang and Li, 2009). Bullfrog larvae typically require several months to three year ...
... Liu and Li, 2009). Bullfrogs prefer larger permanent still waters such as ponds or reservoirs and breed from early spring through late summer (Bruneau and Magnin, 1980; Bury and Whelan, 1984; Shirose and Brooks, 1995; Wang and Li, 2009). Bullfrog larvae typically require several months to three year ...
"Ecosystem Engineers". - Cary Institute of Ecosystem Studies
... ecosystem engineering is often the reason why some exotic species have large impacts on native communities and ecosystems (see review in Crooks, 2002). The ability of some exotic species to engineer the environments they invade such that they enhance their own performance (positive feedbacks) may be ...
... ecosystem engineering is often the reason why some exotic species have large impacts on native communities and ecosystems (see review in Crooks, 2002). The ability of some exotic species to engineer the environments they invade such that they enhance their own performance (positive feedbacks) may be ...
Unit 5 test Answer Section
... C) determined by subtracting deaths from births population to another area and emigration from immigration D) the repeated movement into and out of an area D) not influenced by environmental resistance E) the lack of immigration into an area E) highest in large animals such as elephants and 7. The n ...
... C) determined by subtracting deaths from births population to another area and emigration from immigration D) the repeated movement into and out of an area D) not influenced by environmental resistance E) the lack of immigration into an area E) highest in large animals such as elephants and 7. The n ...
Full text in pdf format
... aggregation in the interval of 10 cm2 to 10 m2 as well as a sharp increase in the aggregation index at larger size scales. These graphs show that the extent of aggregation of A, britannicum is greater than that of the other species on the macroscale. Fig. 3 shows the dependence of the normalized ind ...
... aggregation in the interval of 10 cm2 to 10 m2 as well as a sharp increase in the aggregation index at larger size scales. These graphs show that the extent of aggregation of A, britannicum is greater than that of the other species on the macroscale. Fig. 3 shows the dependence of the normalized ind ...
Will the increasing atmospheric CO2 concentration affect the
... in Nevada (Hunter 1991). It is not known whether water availability will increase in these systems under elevated [CO2], or whether any increase would be large enough to facilitate invasions. Invasive species can benefit from the addition of other resources to ecosystems, as well. In nutrient-poor e ...
... in Nevada (Hunter 1991). It is not known whether water availability will increase in these systems under elevated [CO2], or whether any increase would be large enough to facilitate invasions. Invasive species can benefit from the addition of other resources to ecosystems, as well. In nutrient-poor e ...
D 56. Shachak et al. 2008. Woody sp.as landscape modulators
... Environmental impacts due to ecosystem modulation are usually associated with bioturbation caused by burrowing animals (Whitford and Kay 1999, Reichman and Seabloom 2002). By mixing detritus with mineral soil, earthworms increase the rate of mineralization and redistribute nutrients (Darwin 1881, Me ...
... Environmental impacts due to ecosystem modulation are usually associated with bioturbation caused by burrowing animals (Whitford and Kay 1999, Reichman and Seabloom 2002). By mixing detritus with mineral soil, earthworms increase the rate of mineralization and redistribute nutrients (Darwin 1881, Me ...
Modelling Food Webs
... less enthusiastically embraced by field ecologists, than by theoretical ecologists. For many of those in the field, the attraction of the study of natural communities is in their details and unique features. In fact, even when food webs were published by early investigators, they frequently seemed d ...
... less enthusiastically embraced by field ecologists, than by theoretical ecologists. For many of those in the field, the attraction of the study of natural communities is in their details and unique features. In fact, even when food webs were published by early investigators, they frequently seemed d ...
Perth 2015 - Australasian Wildlife Management Society
... This volume is a pre-conference compilation of abstracts. The contents have not been peerreviewed and abstracts have been printed as received from submitting authors except for minor editing. In many cases the contents contain preliminary results only. Any advice provided in this publication is inte ...
... This volume is a pre-conference compilation of abstracts. The contents have not been peerreviewed and abstracts have been printed as received from submitting authors except for minor editing. In many cases the contents contain preliminary results only. Any advice provided in this publication is inte ...
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.