The Extinction of Endemic Species by a Program of
... Tahiti (by someone who wished to breed it for be found in the territories occupied by Eugfood) in 1967 and spread rapidly to the other landina, and the decline in the number of A chaislands in the archipelago. It s numbers in- tina ha s been ob served in parts of the island creased in Moorea to such ...
... Tahiti (by someone who wished to breed it for be found in the territories occupied by Eugfood) in 1967 and spread rapidly to the other landina, and the decline in the number of A chaislands in the archipelago. It s numbers in- tina ha s been ob served in parts of the island creased in Moorea to such ...
Deakin Research Online - DRO
... such responses to time since fire can predict the occurrence of species across broad spatial scales. We examined the response of bird species to time since fire in semiarid shrubland in southeastern Australia using data from surveys at 499 sites representing a 100-year chronosequence. We used nonlinea ...
... such responses to time since fire can predict the occurrence of species across broad spatial scales. We examined the response of bird species to time since fire in semiarid shrubland in southeastern Australia using data from surveys at 499 sites representing a 100-year chronosequence. We used nonlinea ...
Alternative Dynamic Regimes and Trophic Control of Plant Succession
... our view, alternative states represent different dynamic regimes (sensu Scheffer and others 2001) in which the dominant factor controlling succession varies. Thus, during one phase of succession, development is slowed or arrested by top–down trophic interactions between plants and their associated f ...
... our view, alternative states represent different dynamic regimes (sensu Scheffer and others 2001) in which the dominant factor controlling succession varies. Thus, during one phase of succession, development is slowed or arrested by top–down trophic interactions between plants and their associated f ...
PDF
... other confined vessels. They may be fed intensively, such as by pellets, or extensively, in which case they rely on naturally present food. On reaching the marketable size, the crop is harvested. Alternatively, the juveniles may be used for restocking natural waterways depleted by overfishing, pollu ...
... other confined vessels. They may be fed intensively, such as by pellets, or extensively, in which case they rely on naturally present food. On reaching the marketable size, the crop is harvested. Alternatively, the juveniles may be used for restocking natural waterways depleted by overfishing, pollu ...
Live-bearing Seastar - Natural Values Atlas
... The Tasmanian Live-bearing Seastar is a small orange-yellow seastar, up to 15 mm across, with five arms and a rounded pentagonal shape. Endemic to Tasmania, the species is known only from waters between the high and low tide mark (littoral waters) in the State’s southeast. The seastar is unusual in ...
... The Tasmanian Live-bearing Seastar is a small orange-yellow seastar, up to 15 mm across, with five arms and a rounded pentagonal shape. Endemic to Tasmania, the species is known only from waters between the high and low tide mark (littoral waters) in the State’s southeast. The seastar is unusual in ...
Pyrodiversity vs Biodiversity
... by fire are tightly linked to these resources, so they are unlikely to occur where their favoured resources are scarce. Consequently, the effects of fire can continue to influence some species for a century following fire. For instance, the Murray striped skink and the yellow-plumed honeyeater are both ...
... by fire are tightly linked to these resources, so they are unlikely to occur where their favoured resources are scarce. Consequently, the effects of fire can continue to influence some species for a century following fire. For instance, the Murray striped skink and the yellow-plumed honeyeater are both ...
Provided for non-commercial research and educational use only.
... mixing counteracts the emergence of patches. In a well-mixed environment, all organisms potentially interact with each other, much in contrast to terrestrial systems, where many species are either ‘sessile’ (plants) or have very limited range sizes (most small invertebrates except for flying insects ...
... mixing counteracts the emergence of patches. In a well-mixed environment, all organisms potentially interact with each other, much in contrast to terrestrial systems, where many species are either ‘sessile’ (plants) or have very limited range sizes (most small invertebrates except for flying insects ...
Response of Native Insect Communities to Invasive Plants
... ribwort plantain, Plantago lanceolata, in eastern North America (10). However, herbivores performed less well on the invasive plant, in terms of reduced pupal mass and relative growth rate on plantain, suggesting that there may be a trade-off between plant quality and accessibility. Generalist herbi ...
... ribwort plantain, Plantago lanceolata, in eastern North America (10). However, herbivores performed less well on the invasive plant, in terms of reduced pupal mass and relative growth rate on plantain, suggesting that there may be a trade-off between plant quality and accessibility. Generalist herbi ...
Review of non-native species policy: report of the Working
... When non-native species become invasive they can transform ecosystems, and threaten native and endangered species. All terrestrial and marine natural and semi-natural habitats are affected. Invasive non-native species also damage economic interests, such as agriculture, forestry and infrastructure, ...
... When non-native species become invasive they can transform ecosystems, and threaten native and endangered species. All terrestrial and marine natural and semi-natural habitats are affected. Invasive non-native species also damage economic interests, such as agriculture, forestry and infrastructure, ...
This is an electronic reprint of the original article. This reprint may
... of the fish host, Perca fluviatilis L. (Faltýnková et al. 2009). If any of the hosts—the bird, the snail or the fish—should either increase or decrease in abundance due to environmental changes, this would impinge on the transmission of the parasite and consequently on its abundance in the hosts. ...
... of the fish host, Perca fluviatilis L. (Faltýnková et al. 2009). If any of the hosts—the bird, the snail or the fish—should either increase or decrease in abundance due to environmental changes, this would impinge on the transmission of the parasite and consequently on its abundance in the hosts. ...
TISSIER-THESIS - eCommons@USASK
... environmental conditions and plant traits. Multivariate analyses indicated a strong relationship between community composition and distance from shore. Slope was the most important variable affecting whether a plot had vegetation and instances of grazing. Species with traits better suited to withsta ...
... environmental conditions and plant traits. Multivariate analyses indicated a strong relationship between community composition and distance from shore. Slope was the most important variable affecting whether a plot had vegetation and instances of grazing. Species with traits better suited to withsta ...
Echolocation in sympatric Peale`s dolphins (Lagenorhynchus
... water. They presumably all use echolocation to find and capture prey, but little is known about the evolutionary forces shaping the speciation and biosonar source parameters of toothed whales (Wood et al., 1980). In three phylogenetically different groups of toothed whales [Phoconoidea, Cephalorhync ...
... water. They presumably all use echolocation to find and capture prey, but little is known about the evolutionary forces shaping the speciation and biosonar source parameters of toothed whales (Wood et al., 1980). In three phylogenetically different groups of toothed whales [Phoconoidea, Cephalorhync ...
Niche differentiation, rarity, and commonness in the Australian White
... widespread (also refer to Brown 1984; Orians 1997; Gaston and Fuller 2008), and much earlier Darwin (1859) believed that “rarity is the attribute of a vast number of species in all classes, in all countries”. More recently, Kunin (1997) concluded that all species are rare somewhere. Studies have sho ...
... widespread (also refer to Brown 1984; Orians 1997; Gaston and Fuller 2008), and much earlier Darwin (1859) believed that “rarity is the attribute of a vast number of species in all classes, in all countries”. More recently, Kunin (1997) concluded that all species are rare somewhere. Studies have sho ...
Spatiotemporal variations in aphidparasitoid relative abundance
... Organisms atop trophic chains are particularly sensitive to disturbance, especially when they are dependent on a specific trophic resource subject to strong fluctuations in density and quality, which is the case of parasitoids. We investigated the (1) variability in spatiotemporal relative abundance ...
... Organisms atop trophic chains are particularly sensitive to disturbance, especially when they are dependent on a specific trophic resource subject to strong fluctuations in density and quality, which is the case of parasitoids. We investigated the (1) variability in spatiotemporal relative abundance ...
SIZE RATIOS
... 1975). For example, Carothers (1982) found that resource partitioning in a guild of Hawaiian honeycreepers depended on the morphology of the tongue rather than the size or shape of the bill. Moreover, character displacement may occur among distantly related taxa that do not have comparable body part ...
... 1975). For example, Carothers (1982) found that resource partitioning in a guild of Hawaiian honeycreepers depended on the morphology of the tongue rather than the size or shape of the bill. Moreover, character displacement may occur among distantly related taxa that do not have comparable body part ...
Chapter 2
... 4.5 Alteration in environment by litter ...................................................................... 29 4.6 Leachates from litter............................................................................................ 30 4.7 Control of nutrient cycling ................................. ...
... 4.5 Alteration in environment by litter ...................................................................... 29 4.6 Leachates from litter............................................................................................ 30 4.7 Control of nutrient cycling ................................. ...
The Raccoon dog – A condemned species without a trial? Abstract
... depending on what they could find. Anything between small rodents, snails, amphibians, fish, carcasses, fruit and grain are good enough for them. This means that the raccoon dog is likely to find food in most kind of habitat throughout Europe. Studies of the competition over food among medium sized ...
... depending on what they could find. Anything between small rodents, snails, amphibians, fish, carcasses, fruit and grain are good enough for them. This means that the raccoon dog is likely to find food in most kind of habitat throughout Europe. Studies of the competition over food among medium sized ...
Living where the flow is right: How flow affects
... of bryozoans in the field. Because especially efficient filterers like Membranipora can grow faster and have higher survival under a wide range of conditions of flow, this species may be able to outcompete many other species or take advantage of ephemeral habitats, thereby becoming a potentially eff ...
... of bryozoans in the field. Because especially efficient filterers like Membranipora can grow faster and have higher survival under a wide range of conditions of flow, this species may be able to outcompete many other species or take advantage of ephemeral habitats, thereby becoming a potentially eff ...
Small Mammals in Mbeere, Kenya
... CHAPTER ONE: INTRODUCTION, STUDY AIM AND SPECIFIC OBJECTIVES 1.1 INTRODUCTION The term land use refers to two aspects of habitat condition; it includes the patterns of actual use of land (immediate activities that change habitat conditions) as well as the ecological consequences of these activities ...
... CHAPTER ONE: INTRODUCTION, STUDY AIM AND SPECIFIC OBJECTIVES 1.1 INTRODUCTION The term land use refers to two aspects of habitat condition; it includes the patterns of actual use of land (immediate activities that change habitat conditions) as well as the ecological consequences of these activities ...
Which function describes the species–area relationship
... limit (Williamson et al., 2001, 2002; Dengler, 2003, 2008), SSRs necessarily approach a maximum richness value asymptotically (Gotelli & Colwell, 2001; Christensen, 2007; Dengler, 2008). For SSRs, the actual sampling may be carried out on plots of defined area, but only in SARs does each richness va ...
... limit (Williamson et al., 2001, 2002; Dengler, 2003, 2008), SSRs necessarily approach a maximum richness value asymptotically (Gotelli & Colwell, 2001; Christensen, 2007; Dengler, 2008). For SSRs, the actual sampling may be carried out on plots of defined area, but only in SARs does each richness va ...
Restoration in the Rainshadow - SER
... field combines archival, historical, and anecdotal information, the environmental knowledge of Indigenous peoples, and research in various academic disciplines to reconstruct past peopleenvironment relationships. Valuable information for ecological restoration initiatives can emerge when this multif ...
... field combines archival, historical, and anecdotal information, the environmental knowledge of Indigenous peoples, and research in various academic disciplines to reconstruct past peopleenvironment relationships. Valuable information for ecological restoration initiatives can emerge when this multif ...
Ecological Character Displacement in Adaptive Radiation
... abstract: I give an overview of the observational and experimental evidence for ecological character displacement in adaptive radiation. Sixty-one published cases of character displacement involving closely related species (congeners) make up the observational data set. All cases involve divergence, ...
... abstract: I give an overview of the observational and experimental evidence for ecological character displacement in adaptive radiation. Sixty-one published cases of character displacement involving closely related species (congeners) make up the observational data set. All cases involve divergence, ...
The Role of Ethical Judgments Related to Wildlife
... with attitudes—they are evaluative and they apply to objects. However, they are concerned with a particular type of evaluation—judgments about what is right and wrong—rather than just good and bad or desirable and undesirable. The role that ethical judgments play in determining specific attitudes to ...
... with attitudes—they are evaluative and they apply to objects. However, they are concerned with a particular type of evaluation—judgments about what is right and wrong—rather than just good and bad or desirable and undesirable. The role that ethical judgments play in determining specific attitudes to ...
Ecological Resilience, Biodiversity, and Scale
... more species-rich rainforests, at least in areas of about 1⁄3 ha (80 3 40 m) for 5 years (Ewel and others 1991). Naeem and coworkers (1994) assembled replicate artificial ecosystems at a number of levels of species richness. They demonstrated that carbon dioxide consumption, vegetative cover, and pr ...
... more species-rich rainforests, at least in areas of about 1⁄3 ha (80 3 40 m) for 5 years (Ewel and others 1991). Naeem and coworkers (1994) assembled replicate artificial ecosystems at a number of levels of species richness. They demonstrated that carbon dioxide consumption, vegetative cover, and pr ...
5. Seychelles - Food and Agriculture Organization of the United
... Table 4: Woody plant species that have proved invasive on small islands of Seychelles............14 Table 5: Food plants of some phytophagous endemic insects of Seychelles with restricted host ranges .................................................................................................... ...
... Table 4: Woody plant species that have proved invasive on small islands of Seychelles............14 Table 5: Food plants of some phytophagous endemic insects of Seychelles with restricted host ranges .................................................................................................... ...
Introduced species
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.