Food web structure affects the extinction risk of species in ecological
... Lawton (1978) argued that extinction risk could be related to the trophic position of a species in the food web. Experiments (Petchey et al., 1999) and simulations (Borrvall et al., 2000) have indicated that species at higher trophic levels may be more prone to extinction following a large disturban ...
... Lawton (1978) argued that extinction risk could be related to the trophic position of a species in the food web. Experiments (Petchey et al., 1999) and simulations (Borrvall et al., 2000) have indicated that species at higher trophic levels may be more prone to extinction following a large disturban ...
Habitat isolation and ecological barriers
... and conservation practice. Changes resulting from the fragmentation and isolation o f habitats have been the subject o f a considerable debate several years ago, based ...
... and conservation practice. Changes resulting from the fragmentation and isolation o f habitats have been the subject o f a considerable debate several years ago, based ...
Interspecific Competition and Species` Distributions
... for his "extensive criticism of both the facts According to Diamond (1978), Hutch- and views here expressed, which were ininson (1975, 1978), and others, the path to valuable in completing the final draft." Beunderstanding of the ecological impor- fore 1944 Lack had seemingly no interest tance of in ...
... for his "extensive criticism of both the facts According to Diamond (1978), Hutch- and views here expressed, which were ininson (1975, 1978), and others, the path to valuable in completing the final draft." Beunderstanding of the ecological impor- fore 1944 Lack had seemingly no interest tance of in ...
EPBC Act Protected Matters Report
... This part of the report summarises other matters protected under the Act that may relate to the area you nominated. Approval may be required for a proposed activity that significantly affects the environment on Commonwealth land, when the action is outside the Commonwealth land, or the environment a ...
... This part of the report summarises other matters protected under the Act that may relate to the area you nominated. Approval may be required for a proposed activity that significantly affects the environment on Commonwealth land, when the action is outside the Commonwealth land, or the environment a ...
HYPOTHERMAL MORTALITY IN MARINE FISHES OF
... January 1977. A. Air temperatures are from the tures at 0700 hr on 15 January were 17.2 Vero Beach airport (0 - ) and the 81. Petersand 20.0 C at the St. Petersburg-Clearburg-Clearwater airport (0 B. Indian water and Vero Beach airports, resRiver lagoon water temperatures from the Vera Beach municip ...
... January 1977. A. Air temperatures are from the tures at 0700 hr on 15 January were 17.2 Vero Beach airport (0 - ) and the 81. Petersand 20.0 C at the St. Petersburg-Clearburg-Clearwater airport (0 B. Indian water and Vero Beach airports, resRiver lagoon water temperatures from the Vera Beach municip ...
A hierarchical framework to investigate epiphyte assemblages
... structure (Cascante-Marı́n et al. 2008), or the mechanisms behind change in time, e.g., succession (Ibisch 1996). The essence of their existence, the nonparasitic growth on other plants, highlights a unique feature of epiphytes: they depend on a living organism with varying physical and chemical cha ...
... structure (Cascante-Marı́n et al. 2008), or the mechanisms behind change in time, e.g., succession (Ibisch 1996). The essence of their existence, the nonparasitic growth on other plants, highlights a unique feature of epiphytes: they depend on a living organism with varying physical and chemical cha ...
threatened and declining birds in the new south wales sheep
... low-shrub feeders and dwellers – only three species are classified as canopy foragers, and two are aerial insectivores (the woodswallows). There is a predominance of insectivores among the ground feeders (15) and among all 20 Decliners, but seed-eaters are as well represented as expected from their ...
... low-shrub feeders and dwellers – only three species are classified as canopy foragers, and two are aerial insectivores (the woodswallows). There is a predominance of insectivores among the ground feeders (15) and among all 20 Decliners, but seed-eaters are as well represented as expected from their ...
Biological Assessment of Ecologically Important Areas for Fish and
... Proposed Indicator Species under Criterion 1: Representative species/ habitat types 1. Definition of Indicator Species under Criterion 1: Dominant species with a wide range of distribution in the YSE. 2. Proposed Indicator Species [Small yellow croaker] Larimichthys polyactis [小 黄 鱼, xiaohuangyu] Re ...
... Proposed Indicator Species under Criterion 1: Representative species/ habitat types 1. Definition of Indicator Species under Criterion 1: Dominant species with a wide range of distribution in the YSE. 2. Proposed Indicator Species [Small yellow croaker] Larimichthys polyactis [小 黄 鱼, xiaohuangyu] Re ...
local vs. regional influences on local diversity in
... which should be inversely related to community saturation, are highly variable among systems (Ross 1991), but some patterns are consistent with expectations for saturated communities. For example, successful introductions usually are followed by declines ...
... which should be inversely related to community saturation, are highly variable among systems (Ross 1991), but some patterns are consistent with expectations for saturated communities. For example, successful introductions usually are followed by declines ...
GENETIC VARIATION AMONG POPULATIONS AND SPECIES OF GROUPERS AND CORALGROUPERS
... worth of nearly $3 million, not including the equal or greater recreational catch (NMFS 2002). Hermaphroditism, group spawning, relatively slow maturation, and low fecundity are common to many grouper species (Domeier and Colin 1997). Therefore, this group is particularly vulnerable to overfishing ( ...
... worth of nearly $3 million, not including the equal or greater recreational catch (NMFS 2002). Hermaphroditism, group spawning, relatively slow maturation, and low fecundity are common to many grouper species (Domeier and Colin 1997). Therefore, this group is particularly vulnerable to overfishing ( ...
Functional redundancy in ecology and conservation
... function of both per capita effects and abundance (dominance). The aggregate functional effects of a species within a trophic level or community will be the per capita rate multiplied by organism abundance. It is important to distinguish between functional equivalency in terms of per capita impacts, ...
... function of both per capita effects and abundance (dominance). The aggregate functional effects of a species within a trophic level or community will be the per capita rate multiplied by organism abundance. It is important to distinguish between functional equivalency in terms of per capita impacts, ...
seabird community structure along a productivity gradient
... on species composition: ‘‘Sooty Tern Flocks’’ ( n 5 941 flocks) with a large number of Sooty Terns (Sterna fuscata), ‘‘Juan-Wedge Flocks’’ (n 5 402 flocks) with a large number of Juan Fernandez Petrels (Pterodroma externa) and Wedge-tailed Shearwaters (Puffinus pacificus), and ‘‘Booby Flocks’’ (n 5 ...
... on species composition: ‘‘Sooty Tern Flocks’’ ( n 5 941 flocks) with a large number of Sooty Terns (Sterna fuscata), ‘‘Juan-Wedge Flocks’’ (n 5 402 flocks) with a large number of Juan Fernandez Petrels (Pterodroma externa) and Wedge-tailed Shearwaters (Puffinus pacificus), and ‘‘Booby Flocks’’ (n 5 ...
population density
... a deer’s habitat if the density of the deer population decreases over a given time. What is that resources may be depleted or community may have changed due to arrival of a new predator Continue ...
... a deer’s habitat if the density of the deer population decreases over a given time. What is that resources may be depleted or community may have changed due to arrival of a new predator Continue ...
An allometric approach to quantify the extinction vulnerability of
... or species groups to extinction (Cardillo et al. 2005). Brown, J. H., J. F. Gillooly, A. P. Allen, V. M. Savage, and G. B. West. 2004. Toward a metabolic theory of ecology. As it is impossible to protect all species from extinction, Ecology 85:1771–1789. policy makers and conservationists often prio ...
... or species groups to extinction (Cardillo et al. 2005). Brown, J. H., J. F. Gillooly, A. P. Allen, V. M. Savage, and G. B. West. 2004. Toward a metabolic theory of ecology. As it is impossible to protect all species from extinction, Ecology 85:1771–1789. policy makers and conservationists often prio ...
Submission - Friends of Felton
... Koala Conservation and Management Strategy 2009-2014 (Department of the Environment, Water, Heritage and the Arts 2009), states a need for: “Increased consideration of koala habitat demonstrated in development planning” throughout the species’ range. A deficiency in the Queensland Vegetation Managem ...
... Koala Conservation and Management Strategy 2009-2014 (Department of the Environment, Water, Heritage and the Arts 2009), states a need for: “Increased consideration of koala habitat demonstrated in development planning” throughout the species’ range. A deficiency in the Queensland Vegetation Managem ...
7 Colorado Desert Region - Borrego Springs Chamber of Commerce
... Pupfish move along the edges of the Salton Sea between shoreline pools, agricultural drains, and creek habitats associated with the sea. This connectivity between populations maintains genetic diversity and allows for repopulation of areas where pupfish may be temporarily eliminated by changing envi ...
... Pupfish move along the edges of the Salton Sea between shoreline pools, agricultural drains, and creek habitats associated with the sea. This connectivity between populations maintains genetic diversity and allows for repopulation of areas where pupfish may be temporarily eliminated by changing envi ...
Chapter 52: An Introduction to Ecology and the Biosphere
... were marked with a dab of purple hair dye on the back of the neck. Two weeks later, the trapping was repeated. This time 75 mice were trapped, out of which 48 of the mice were marked. Using the formula N = mn/x, what is the population of mice in the field? (Answer is at the end of this reading guide ...
... were marked with a dab of purple hair dye on the back of the neck. Two weeks later, the trapping was repeated. This time 75 mice were trapped, out of which 48 of the mice were marked. Using the formula N = mn/x, what is the population of mice in the field? (Answer is at the end of this reading guide ...
Assemblage and interaction structure of the anemonefish
... 2005), social interactions (Buston 2003; Mitchell and Dill 2005; Buston and Cant 2006), and breeding behaviour (Munday et al. 2006), in part because we have a relatively complete knowledge of the diversity of anemonefish and anemones and the extent of their interaction (Fautin and Allen 1997). In co ...
... 2005), social interactions (Buston 2003; Mitchell and Dill 2005; Buston and Cant 2006), and breeding behaviour (Munday et al. 2006), in part because we have a relatively complete knowledge of the diversity of anemonefish and anemones and the extent of their interaction (Fautin and Allen 1997). In co ...
Can community-protected areas conserve biodiversity in human
... Tropical forests are the world´s most biodiverse terrestrial ecosystems [1] and face high deforestation rates [2]. As old-growth forests become scarcer [3], complex landscapes in which secondary and degraded forests coexist with productive land-cover types tend to be the most common scenario through ...
... Tropical forests are the world´s most biodiverse terrestrial ecosystems [1] and face high deforestation rates [2]. As old-growth forests become scarcer [3], complex landscapes in which secondary and degraded forests coexist with productive land-cover types tend to be the most common scenario through ...
Chapter 10 - Government of New Brunswick
... Many centuries ago, the Fundy coast and islands would have supported an immensely productive intertidal and tidal zone full of sea urchins, mollusks, seabirds, and seals. The native inhabitants would camp for a time at one site and deposit shellfish refuse in a mound that, when they moved on, compac ...
... Many centuries ago, the Fundy coast and islands would have supported an immensely productive intertidal and tidal zone full of sea urchins, mollusks, seabirds, and seals. The native inhabitants would camp for a time at one site and deposit shellfish refuse in a mound that, when they moved on, compac ...
effects of grazer richness and composition on algal biomass in a
... one-way ANOVAS with the fixed factor ‘‘composition’’ were conducted. The zero-grazer level was excluded from this analysis, since we were interested in the effect of grazer identity and composition on algal biomass, but not in the effect of grazer presence. Student-NeumanKeuls (SNK) tests were used t ...
... one-way ANOVAS with the fixed factor ‘‘composition’’ were conducted. The zero-grazer level was excluded from this analysis, since we were interested in the effect of grazer identity and composition on algal biomass, but not in the effect of grazer presence. Student-NeumanKeuls (SNK) tests were used t ...
The importance of invertebrate biodiversity
... In Otago, as elsewhere in New Zealand, invertebrates are found from the coast to the nival (above summer snowline) zone on the highest mountains. They are not only characteristic of all the plant communities present, but by their differential grazing of various plants strongly determine the plant sp ...
... In Otago, as elsewhere in New Zealand, invertebrates are found from the coast to the nival (above summer snowline) zone on the highest mountains. They are not only characteristic of all the plant communities present, but by their differential grazing of various plants strongly determine the plant sp ...
Comparing the genetic population structure of two species of arctic
... less dispersal among local populations of brown lemmings resulting in more isolated populations on the islands. Less dispersal would imply less gene flow, and greater genetic differentiation of island populations might thus be expected for brown lemmings than for collared lemmings. In the present st ...
... less dispersal among local populations of brown lemmings resulting in more isolated populations on the islands. Less dispersal would imply less gene flow, and greater genetic differentiation of island populations might thus be expected for brown lemmings than for collared lemmings. In the present st ...
Predicting Distribution, Habitat Suitability and the Potential Loss of
... documented S. formosa in upper and lower montane evergreen forests. Both forests were relatively undisturbed and contained a high density of mature Fokienia hodginsii (Dunn), a cypress-like conifer. Individuals were regularly eneountered in eanopies of F. hodginsii at Nakai-Nam Theun, Laos (Tobias 1 ...
... documented S. formosa in upper and lower montane evergreen forests. Both forests were relatively undisturbed and contained a high density of mature Fokienia hodginsii (Dunn), a cypress-like conifer. Individuals were regularly eneountered in eanopies of F. hodginsii at Nakai-Nam Theun, Laos (Tobias 1 ...
J. L. Burnett and K. E. Sieving: RAPTOR DETECTION
... at mist nets. Therefore, we investigated the utility of songbird distress calls to invoke prey inspection behavior by raptors. Distress calls are elicited under a variety of conditions when individuals perceive imminent harm or experience contact with an attacker (Norris & Stamm 1965). Among the fun ...
... at mist nets. Therefore, we investigated the utility of songbird distress calls to invoke prey inspection behavior by raptors. Distress calls are elicited under a variety of conditions when individuals perceive imminent harm or experience contact with an attacker (Norris & Stamm 1965). Among the fun ...
Island restoration
The ecological restoration of islands, or island restoration, is the application of the principles of ecological restoration to islands and island groups. Islands, due to their isolation, are home to many of the world's endemic species, as well as important breeding grounds for seabirds and some marine mammals. Their ecosystems are also very vulnerable to human disturbance and particularly to introduced species, due to their small size. Island groups such as New Zealand and Hawaii have undergone substantial extinctions and losses of habitat. Since the 1950s several organisations and government agencies around the world have worked to restore islands to their original states; New Zealand has used them to hold natural populations of species that would otherwise be unable to survive in the wild. The principal components of island restoration are the removal of introduced species and the reintroduction of native species.