The Kiwi - Nga Manu Nature Reserve
... of a huge continent called Gondwanaland along with South America, Africa, Australia, India, and Antarctica • Gondwanaland broke apart about 80 million years ago. As a result, species were no longer able to travel around the whole continent but were trapped on their newly formed continent. There are ...
... of a huge continent called Gondwanaland along with South America, Africa, Australia, India, and Antarctica • Gondwanaland broke apart about 80 million years ago. As a result, species were no longer able to travel around the whole continent but were trapped on their newly formed continent. There are ...
Species Status Assessment Report for the Rio Grande Cutthroat Trout
... focused on these seven factors because they were found to potentially have population-level effects on the subspecies. The seven factors were: (1) Demographic Risk: Small population sizes are at greater risk from inbreeding, demographic fluctuations, and reduced genetic diversity, and they are more ...
... focused on these seven factors because they were found to potentially have population-level effects on the subspecies. The seven factors were: (1) Demographic Risk: Small population sizes are at greater risk from inbreeding, demographic fluctuations, and reduced genetic diversity, and they are more ...
Assessing the future global impacts of ozone on
... to our understanding of the effects of changing patterns of ozone exposure in the specific context of a changing global environment, and to consider the implications of these changes for risk assessments of the future impacts of ozone. The global patterns of exposure of vegetation to ozone are chang ...
... to our understanding of the effects of changing patterns of ozone exposure in the specific context of a changing global environment, and to consider the implications of these changes for risk assessments of the future impacts of ozone. The global patterns of exposure of vegetation to ozone are chang ...
June X, 2006 - Wild Fish Conservancy
... populations within the PS steelhead DPS, and forestalls the potential for exploiting those uncertainties to reach an inaccurate and inappropriate conclusion that the extinction risk for PS steelhead is low. However, we believe the PS Steelhead Proposed Listing illustrates that NOAA’s application of ...
... populations within the PS steelhead DPS, and forestalls the potential for exploiting those uncertainties to reach an inaccurate and inappropriate conclusion that the extinction risk for PS steelhead is low. However, we believe the PS Steelhead Proposed Listing illustrates that NOAA’s application of ...
6.4 Environmental Niche Analysis - Predicting potential occurrence
... Ecological niche models (ENM) have been used to study issues in evolution (Peterson 2001), ecology (Anderson et al. 2002), and conservation (Peterson and Robins 2003). Their predictive models of species geographic distributions are important in a variety of conservation applications, such as conserv ...
... Ecological niche models (ENM) have been used to study issues in evolution (Peterson 2001), ecology (Anderson et al. 2002), and conservation (Peterson and Robins 2003). Their predictive models of species geographic distributions are important in a variety of conservation applications, such as conserv ...
Conservation Strategy Updated 3-16-17
... native to the northeastern United States from the Hudson River Valley of New York eastward. The NEC is currently threatened by the loss of its habitat through development and forest succession. It may also be imperiled by encroachment into its range by the introduced eastern cottontail (Sylvilagus f ...
... native to the northeastern United States from the Hudson River Valley of New York eastward. The NEC is currently threatened by the loss of its habitat through development and forest succession. It may also be imperiled by encroachment into its range by the introduced eastern cottontail (Sylvilagus f ...
Thresholds in Habitat Supply: A Review of the Literature
... or “threshold” change that may have rapid, drastic effects on species or ecosystems. Ecological thresholds involve a change in the rate of response to ecosystem change; a critical value of an ecosystem property at which previously linear or unobserved change becomes a drastic transformation. Around ...
... or “threshold” change that may have rapid, drastic effects on species or ecosystems. Ecological thresholds involve a change in the rate of response to ecosystem change; a critical value of an ecosystem property at which previously linear or unobserved change becomes a drastic transformation. Around ...
Chapter 14-7 Hynobiidae, Ambystomatidae, and Plethodontidae
... and northern and northwestern Korea (Frost 2011). It is an inhabitant of wet coniferous forests and mixed deciduous forests of the taiga, as well as riparian groves of the tundra and forest steppe (Kuzmin 1999). This is one of the few amphibians to survive the cold of northernmost habitats. However, ...
... and northern and northwestern Korea (Frost 2011). It is an inhabitant of wet coniferous forests and mixed deciduous forests of the taiga, as well as riparian groves of the tundra and forest steppe (Kuzmin 1999). This is one of the few amphibians to survive the cold of northernmost habitats. However, ...
Predation by the plague minnow - threat abatemement plan (PDF
... New England bell frog (L. castanea) and other native frog species. The NPWS is therefore required to prepare a TAP to manage this key threatening process, so as to abate, ameliorate or eliminate the adverse impacts of gambusia predation on threatened species. This plan constitutes the final approved ...
... New England bell frog (L. castanea) and other native frog species. The NPWS is therefore required to prepare a TAP to manage this key threatening process, so as to abate, ameliorate or eliminate the adverse impacts of gambusia predation on threatened species. This plan constitutes the final approved ...
Maned Wolf Action Plan - Pró
... of the legs, and the area from the nape to the back show a dark color (mostly black). Often, the anterior part of the neck, the interior of the ear and the tip of the tail may be light, even white. The species distribution ranges through Central and eastern South America including northern Uruguay a ...
... of the legs, and the area from the nape to the back show a dark color (mostly black). Often, the anterior part of the neck, the interior of the ear and the tip of the tail may be light, even white. The species distribution ranges through Central and eastern South America including northern Uruguay a ...
Conservation of kaka in New Zealand
... 5.2 How do the kaka's diets vary seasonally and what are the phenology patterns of kaka's principal food species? 5.3 What is the natural periodicity of breeding? It appears that kaka breeding is linked to the occurrence of high quality foods available only periodically. Thus kaka may not breed ever ...
... 5.2 How do the kaka's diets vary seasonally and what are the phenology patterns of kaka's principal food species? 5.3 What is the natural periodicity of breeding? It appears that kaka breeding is linked to the occurrence of high quality foods available only periodically. Thus kaka may not breed ever ...
ppt檔案
... At high elevation sites, neither factor alone had any affect. But together, the two factors reduced tadpole survival. At low elevation sites, this effect was not seen. ...
... At high elevation sites, neither factor alone had any affect. But together, the two factors reduced tadpole survival. At low elevation sites, this effect was not seen. ...
SPATIAL SYNCHRONY IN POPULATION DYNAMICS ∗ Andrew
... populations. However, researchers have observed considerable variation in the geographical range of synchrony in studies of various organisms, only some of which can be attributed to differences in scale intrinsic to the organism itself. The observed range of spatial synchrony is a few centimeters i ...
... populations. However, researchers have observed considerable variation in the geographical range of synchrony in studies of various organisms, only some of which can be attributed to differences in scale intrinsic to the organism itself. The observed range of spatial synchrony is a few centimeters i ...
SPATIAL SYNCHRONY IN POPULATION DYNAMICS∗ Andrew
... populations. However, researchers have observed considerable variation in the geographical range of synchrony in studies of various organisms, only some of which can be attributed to differences in scale intrinsic to the organism itself. The observed range of spatial synchrony is a few centimeters i ...
... populations. However, researchers have observed considerable variation in the geographical range of synchrony in studies of various organisms, only some of which can be attributed to differences in scale intrinsic to the organism itself. The observed range of spatial synchrony is a few centimeters i ...
COSEWIC assessment and status report on the Marbled Murrelet
... et al. 2006). This simulation suggested <10% probability of extinction within 100500 years with coastwide population at or above 12,000 breeding pairs (about 36,000 birds). Current population estimate is 72,600-125,600 birds. Increased risk of extinction for local populations below 5000 pairs. See t ...
... et al. 2006). This simulation suggested <10% probability of extinction within 100500 years with coastwide population at or above 12,000 breeding pairs (about 36,000 birds). Current population estimate is 72,600-125,600 birds. Increased risk of extinction for local populations below 5000 pairs. See t ...
Plasticity of Hatching in Amphibians: Evolution, Trade
... Fig. 2 Estimated magnitudes of environmentally cued shifts in the timing of hatching across amphibian species and environmental factors. Shifts in the timing of hatching are plotted as a percentage of the embryonic period (1) of control embryos that hatched spontaneously, for accelerations, or (2) b ...
... Fig. 2 Estimated magnitudes of environmentally cued shifts in the timing of hatching across amphibian species and environmental factors. Shifts in the timing of hatching are plotted as a percentage of the embryonic period (1) of control embryos that hatched spontaneously, for accelerations, or (2) b ...
the ecological impact of invasive cane toads (bufo marinus) in
... ornatus, showed higher not lower rates of growth if kept with Bufo tadpoles, reflecting lower survival rates (and thus, densities) (Williamson 1999). A range of aquatic vertebrates and invertebrates feed on algae, detritus and suspended organic matter (van Dam et al. 2002). Freeland (2004) reported ...
... ornatus, showed higher not lower rates of growth if kept with Bufo tadpoles, reflecting lower survival rates (and thus, densities) (Williamson 1999). A range of aquatic vertebrates and invertebrates feed on algae, detritus and suspended organic matter (van Dam et al. 2002). Freeland (2004) reported ...
effects of habitat fragmentation on biodiversity
... ■ Abstract The literature on effects of habitat fragmentation on biodiversity is huge. It is also very diverse, with different authors measuring fragmentation in different ways and, as a consequence, drawing different conclusions regarding both the magnitude and direction of its effects. Habitat fra ...
... ■ Abstract The literature on effects of habitat fragmentation on biodiversity is huge. It is also very diverse, with different authors measuring fragmentation in different ways and, as a consequence, drawing different conclusions regarding both the magnitude and direction of its effects. Habitat fra ...
EFFECTS OF HABITAT FRAGMENTATION ON
... ■ Abstract The literature on effects of habitat fragmentation on biodiversity is huge. It is also very diverse, with different authors measuring fragmentation in different ways and, as a consequence, drawing different conclusions regarding both the magnitude and direction of its effects. Habitat fra ...
... ■ Abstract The literature on effects of habitat fragmentation on biodiversity is huge. It is also very diverse, with different authors measuring fragmentation in different ways and, as a consequence, drawing different conclusions regarding both the magnitude and direction of its effects. Habitat fra ...
Conservation of Wildlife Populations
... Box 6.1 Multiple Allee effects in African wild dogs Box 6.2 The logistic equation captures one form of density dependence but is not a universal law Box 6.3 Chaotic dynamics in northern small mammals Box 7.1 How to calculate reproductive value, SSD, and the expected population growth at SSD Box 7.2 ...
... Box 6.1 Multiple Allee effects in African wild dogs Box 6.2 The logistic equation captures one form of density dependence but is not a universal law Box 6.3 Chaotic dynamics in northern small mammals Box 7.1 How to calculate reproductive value, SSD, and the expected population growth at SSD Box 7.2 ...
abstracts layout - Carnivore Conservation
... Conservation Without Borders • Abstracts, Contributed Oral Presentations Effective conservation policies may lead to a recovery of populations which compete with human activities, namely when food production (e.g. aquaculture) offers attractive resources for carnivore vertebrates (such as otters an ...
... Conservation Without Borders • Abstracts, Contributed Oral Presentations Effective conservation policies may lead to a recovery of populations which compete with human activities, namely when food production (e.g. aquaculture) offers attractive resources for carnivore vertebrates (such as otters an ...
The invasive Pacific oyster, Crassostrea gigas, in
... 2 The active and passive dispersal of Crassostrea gigas..................................................................................... 15 2.1 Distribution of the Pacific oyster, Crassostrea gigas, in Europe ............................................................. 15 2.2 Distribution of Cr ...
... 2 The active and passive dispersal of Crassostrea gigas..................................................................................... 15 2.1 Distribution of the Pacific oyster, Crassostrea gigas, in Europe ............................................................. 15 2.2 Distribution of Cr ...
Ocelot CH Petition - WildEarth Guardians
... resulting from climate change. A driver of anthropogenic threats is human population growth. To protect the Ocelot from extinction, its suitable habitat must be expanded and connected. Critical habitat is a necessary measure to ensure these protections. FWS should therefore designate critical habita ...
... resulting from climate change. A driver of anthropogenic threats is human population growth. To protect the Ocelot from extinction, its suitable habitat must be expanded and connected. Critical habitat is a necessary measure to ensure these protections. FWS should therefore designate critical habita ...
fisken og
... areas there is a limited to moderate risk that a bio-invasion of C. gigas will develop. For Biogenic reefs and Sub-littoral sediment in high energy areas there is a moderate to high risk for a bio-invasion. A risk assessment was performed for each of the four habitat types: It is concluded that for ...
... areas there is a limited to moderate risk that a bio-invasion of C. gigas will develop. For Biogenic reefs and Sub-littoral sediment in high energy areas there is a moderate to high risk for a bio-invasion. A risk assessment was performed for each of the four habitat types: It is concluded that for ...
Reptile Habitat Management Handbook
... aspects of mitigation, such as legislation, surveys or the amount of habitat to be retained. ...
... aspects of mitigation, such as legislation, surveys or the amount of habitat to be retained. ...
Decline in amphibian populations
Since the 1980s, declines in amphibian populations, including population crashes and mass localized extinctions, have been noted from locations all over the world. These declines are perceived as one of the most critical threats to global biodiversity, and several causes are believed to be involved, including disease, habitat destruction and modification, exploitation, pollution, pesticide use, introduced species, and ultraviolet-B radiation (UV-B). However, many of the causes of amphibian declines are still poorly understood, and the topic is currently a subject of much ongoing research. Calculations based on extinction rates suggest that the current extinction rate of amphibians could be 211 times greater than the background extinction rate and the estimate goes up to 25,000–45,000 times if endangered species are also included in the computation.