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Scale dependent relationships between native plant
... 1985; Papes and Peterson 2003). Its high reproductive capacity and windborne seeds are particularly adapted to colonizing bare or intermittently bare areas (Auld and Martin 1975) which make it a troublesome weed of crops, plantations, and pastures in many parts of the world (Wang et al. 1997). The w ...
... 1985; Papes and Peterson 2003). Its high reproductive capacity and windborne seeds are particularly adapted to colonizing bare or intermittently bare areas (Auld and Martin 1975) which make it a troublesome weed of crops, plantations, and pastures in many parts of the world (Wang et al. 1997). The w ...
Australian Biodiversity Under Threat
... of these threats, how they are being handled now, and how they might be handled better, are discussed in the paper. Australians are sometimes apt to blame the inadequate knowledge of the past for the present state of the environment. We now have much of the knowledge to do better, but do we have the ...
... of these threats, how they are being handled now, and how they might be handled better, are discussed in the paper. Australians are sometimes apt to blame the inadequate knowledge of the past for the present state of the environment. We now have much of the knowledge to do better, but do we have the ...
Relative levels of food aggression displayed by Common
... aggression than other species, and displayed significantly less aggression than native Australian Magpies (Cracticus tibicen). Furthermore, the presence of Common Mynas at a feeding resource had no greater effect on the abundance of heterospecific individuals than the presence of any other species. Pr ...
... aggression than other species, and displayed significantly less aggression than native Australian Magpies (Cracticus tibicen). Furthermore, the presence of Common Mynas at a feeding resource had no greater effect on the abundance of heterospecific individuals than the presence of any other species. Pr ...
Ecology of Native Animals in California Grasslands
... to be two of the most ecologically important vertebrates in California grasslands and that their capacities to disturb soils are considerable. His review of the literature indicated that ground squirrels occur in grasslands in densities of 4.2 – 45.2 individuals per hectare and gophers in densities ...
... to be two of the most ecologically important vertebrates in California grasslands and that their capacities to disturb soils are considerable. His review of the literature indicated that ground squirrels occur in grasslands in densities of 4.2 – 45.2 individuals per hectare and gophers in densities ...
Existence and construction of large stable food webs
... Figure 1: Definitions. a, Simple food web consisting of four trophic levels. We define the nutrient source to be trophic level zero. The trophic level of any species is the average trophic level of its resources plus one. Colored circles mark species, light blue ovals mark pairings of species, symbo ...
... Figure 1: Definitions. a, Simple food web consisting of four trophic levels. We define the nutrient source to be trophic level zero. The trophic level of any species is the average trophic level of its resources plus one. Colored circles mark species, light blue ovals mark pairings of species, symbo ...
Testing hypotheses on the ecological patterns of rarity using a novel
... may be naturally rare in a given community because the area surveyed is on the outskirts of its natural range (this is typical with species that are common globally, but that are locally rare; Harcourt et al. 2002); rarity might also be more of a result of human impact (i.e., over-hunting; one speci ...
... may be naturally rare in a given community because the area surveyed is on the outskirts of its natural range (this is typical with species that are common globally, but that are locally rare; Harcourt et al. 2002); rarity might also be more of a result of human impact (i.e., over-hunting; one speci ...
Managing Threatening Processes
... This lists the priority vegetation types that occur in the Planning Scheme area that should be protected as far as practicable. A Waterways, Wetlands and the Coastal Zone Schedule identifies zones that are “highly susceptible to human degradation and should be accorded the highest level of protectio ...
... This lists the priority vegetation types that occur in the Planning Scheme area that should be protected as far as practicable. A Waterways, Wetlands and the Coastal Zone Schedule identifies zones that are “highly susceptible to human degradation and should be accorded the highest level of protectio ...
The intermediate disturbance hypothesis should be
... they failed to sample a sufficient range of disturbance frequencies or intensities. But methodological artifacts can cut both ways. For instance, published empirical studies might overstate the frequency of humped diversity–disturbance relationships because researchers tend to look for such relation ...
... they failed to sample a sufficient range of disturbance frequencies or intensities. But methodological artifacts can cut both ways. For instance, published empirical studies might overstate the frequency of humped diversity–disturbance relationships because researchers tend to look for such relation ...
Impact: Toward a Framework for Understanding the Ecological
... Although ecologists commonly talk about the impacts of nonindigenous species, little formal attention has been given to defining what we mean by impact, or connecting ecological theory with particular measures of impact. The resulting lack of generalizations regarding invasion impacts is more than a ...
... Although ecologists commonly talk about the impacts of nonindigenous species, little formal attention has been given to defining what we mean by impact, or connecting ecological theory with particular measures of impact. The resulting lack of generalizations regarding invasion impacts is more than a ...
Impact: toward a framework for understanding
... Although ecologists commonly talk about the impacts of nonindigenous species, little formal attention has been given to defining what we mean by impact, or connecting ecological theory with particular measures of impact. The resulting lack of generalizations regarding invasion impacts is more than a ...
... Although ecologists commonly talk about the impacts of nonindigenous species, little formal attention has been given to defining what we mean by impact, or connecting ecological theory with particular measures of impact. The resulting lack of generalizations regarding invasion impacts is more than a ...
The importance of niches for the maintenance of species diversity
... species’ differences in rooting depth12, the resources most limiting growth7 and interactions with specialist consumers13,14. What unifies these differences is that they all cause species to limit themselves more than they limit their competitors15 (Fig. 1). Niche differences thus stabilize competit ...
... species’ differences in rooting depth12, the resources most limiting growth7 and interactions with specialist consumers13,14. What unifies these differences is that they all cause species to limit themselves more than they limit their competitors15 (Fig. 1). Niche differences thus stabilize competit ...
Explaining the global biodiversity gradient: energy, area, history and
... east–west than north–south. It is a commonplace of horticulture and agriculture that plants can be successfully moved across the planet within their climatic belt (between for instance temperate China, North America, Chile and Europe) but only with great difficulty and under artificial climate contr ...
... east–west than north–south. It is a commonplace of horticulture and agriculture that plants can be successfully moved across the planet within their climatic belt (between for instance temperate China, North America, Chile and Europe) but only with great difficulty and under artificial climate contr ...
The importance of niches for the maintenance of species diversity
... species’ differences in rooting depth12, the resources most limiting growth7 and interactions with specialist consumers13,14. What unifies these differences is that they all cause species to limit themselves more than they limit their competitors15 (Fig. 1). Niche differences thus stabilize competit ...
... species’ differences in rooting depth12, the resources most limiting growth7 and interactions with specialist consumers13,14. What unifies these differences is that they all cause species to limit themselves more than they limit their competitors15 (Fig. 1). Niche differences thus stabilize competit ...
ThemeGallery PowerTemplate
... Interference competition can also occur in sessile species. Example: The acorn barnacle often crushes or smothers nearby individuals of another barnacle species as it grows. As a result, it directly prevents the other species from living in most portions of a rocky intertidal zone. ...
... Interference competition can also occur in sessile species. Example: The acorn barnacle often crushes or smothers nearby individuals of another barnacle species as it grows. As a result, it directly prevents the other species from living in most portions of a rocky intertidal zone. ...
video slide - Course
... affect a community’s species diversity. • Species richness generally declines along an equatorial-polar gradient and is especially great in the tropics. • Two key factors in equatorial-polar gradients of species richness are probably evolutionary history and climate. • The greater age of tropical en ...
... affect a community’s species diversity. • Species richness generally declines along an equatorial-polar gradient and is especially great in the tropics. • Two key factors in equatorial-polar gradients of species richness are probably evolutionary history and climate. • The greater age of tropical en ...
community - dsapresents.org
... affect a community’s species diversity. • Species richness generally declines along an equatorial-polar gradient and is especially great in the tropics. • Two key factors in equatorial-polar gradients of species richness are probably evolutionary history and climate. • The greater age of tropical en ...
... affect a community’s species diversity. • Species richness generally declines along an equatorial-polar gradient and is especially great in the tropics. • Two key factors in equatorial-polar gradients of species richness are probably evolutionary history and climate. • The greater age of tropical en ...
Native Plants for Landscaping and Restoration in
... benefits. To help you choose species, some producers provide guides or species lists which include each plant's site requirements, bloom color and bloom time. For east-central Minnesota, look for native plant community species lists at www.greatrivergreening.org. A good resource for shoreland restor ...
... benefits. To help you choose species, some producers provide guides or species lists which include each plant's site requirements, bloom color and bloom time. For east-central Minnesota, look for native plant community species lists at www.greatrivergreening.org. A good resource for shoreland restor ...
Commonness and rarity determinants of woody
... along other relevant ecological dimensions, such as the variety of habitats where the species appear, to distinguish different classes of rarity (Rabinowitz 1981; Rabinowitz et al. 1986). Species commonness and rarity have been frequently related to species traits. In plants, studies have found that ...
... along other relevant ecological dimensions, such as the variety of habitats where the species appear, to distinguish different classes of rarity (Rabinowitz 1981; Rabinowitz et al. 1986). Species commonness and rarity have been frequently related to species traits. In plants, studies have found that ...
Anthropomorphized species as tools for
... important way in which people make sense of interactions with the non-human world (Guthrie 1997; Mitchell 1997; Lorimer 2007; Taylor 2011). Recently, the role of anthropomorphism as a useful tool for conservation outreach and environmental education has been gaining attention (Chan 2012; Tam et al. ...
... important way in which people make sense of interactions with the non-human world (Guthrie 1997; Mitchell 1997; Lorimer 2007; Taylor 2011). Recently, the role of anthropomorphism as a useful tool for conservation outreach and environmental education has been gaining attention (Chan 2012; Tam et al. ...
SPECIAL-STATUS SPECIES BIOLOGY AND LIKELIHOOD OF
... at best in the vicinity. No individuals were detected, nor is there any direct indication of them. Although individuals may have been missed, it is unlikely that substantial populations are present. Further evaluation should usually not be required for individual species except, in most cases, for t ...
... at best in the vicinity. No individuals were detected, nor is there any direct indication of them. Although individuals may have been missed, it is unlikely that substantial populations are present. Further evaluation should usually not be required for individual species except, in most cases, for t ...
Do subordinate species punch above their weight? Evidence from
... The functional importance of subordinate species has been mainly investigated through the lens of compensatory dynamics and ecosystem stability (Adler & Bradford, 2002; Suding et al., 2006). If interspecific competition maintains dominance and functional redundancy is high, as expected in species-ri ...
... The functional importance of subordinate species has been mainly investigated through the lens of compensatory dynamics and ecosystem stability (Adler & Bradford, 2002; Suding et al., 2006). If interspecific competition maintains dominance and functional redundancy is high, as expected in species-ri ...
Testing macroecology models with stream-fish assemblages Nicholas J. Gotelli
... Traditional macroecological analyses have been based on bivariate plots of the relationships between body size, population size and geographic range of extant species (Brown, 1995). For stream fishes of Oklahoma, this analysis is relatively non-informative. There is little concordance between the pat ...
... Traditional macroecological analyses have been based on bivariate plots of the relationships between body size, population size and geographic range of extant species (Brown, 1995). For stream fishes of Oklahoma, this analysis is relatively non-informative. There is little concordance between the pat ...
Gough and Grace 1999
... These predictions are then compared with observed changes in species density resulting from experimental field manipulations. The variables manipulated were based on those suggested to be important in earlier papers (Gough et al. 1994, Grace and Pugesek 1997), and included soil fertility, salinity, ...
... These predictions are then compared with observed changes in species density resulting from experimental field manipulations. The variables manipulated were based on those suggested to be important in earlier papers (Gough et al. 1994, Grace and Pugesek 1997), and included soil fertility, salinity, ...
Here are some excerpts from various reports and articles of
... sewage effluents...dilution is not the answer for pollution. 206/ In addition to eutrophication, alterations of nutrient ratios are often held responsible for changes to pelagic ecosystems that may lead to increased occurrence of harmful blooms (ref)...further experimental study and fieldwork is urg ...
... sewage effluents...dilution is not the answer for pollution. 206/ In addition to eutrophication, alterations of nutrient ratios are often held responsible for changes to pelagic ecosystems that may lead to increased occurrence of harmful blooms (ref)...further experimental study and fieldwork is urg ...
Fact Sheet No.15: Tunicate
... on the East Coast of the United States. It is common along the West Coast from Baja California to British Columbia. It was first recorded in Prince William Sound in 1999 where it is currently established. Observations have shown the Tunicate to be abundant at the Sitka Sea Farm near Sitka, Alaska. T ...
... on the East Coast of the United States. It is common along the West Coast from Baja California to British Columbia. It was first recorded in Prince William Sound in 1999 where it is currently established. Observations have shown the Tunicate to be abundant at the Sitka Sea Farm near Sitka, Alaska. T ...
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.