First record of a tunnel breeding population of Pleurodeles waltl and
... found. The water was full of bat faeces and the density of sighted invertebrate preys was very low and probably different to that one outside the cave so it would be interesting to verify if the larvae would be able to complete their metamorphosis. The larvae we found had a small size, so we suspect ...
... found. The water was full of bat faeces and the density of sighted invertebrate preys was very low and probably different to that one outside the cave so it would be interesting to verify if the larvae would be able to complete their metamorphosis. The larvae we found had a small size, so we suspect ...
Our natural environment - Department of Conservation
... are considered threatened. Many populations of these threatened species have disappeared from areas they were once found. This pattern of local loss is the forerunner to species extinction. And species loss is often the result of a more pervasive loss – that of natural habitats and ecosystems. Chang ...
... are considered threatened. Many populations of these threatened species have disappeared from areas they were once found. This pattern of local loss is the forerunner to species extinction. And species loss is often the result of a more pervasive loss – that of natural habitats and ecosystems. Chang ...
Foots Creek Rangeland Health Analysis
... disturbances, are incapable of meeting this standard. For example, shallow-rooted winter-annual grasses that completely dominate some sites do not fully occupy the potential rooting depth of some soils, thereby reducing nutrient cycling well below optimum levels. In addition, these plants have a rel ...
... disturbances, are incapable of meeting this standard. For example, shallow-rooted winter-annual grasses that completely dominate some sites do not fully occupy the potential rooting depth of some soils, thereby reducing nutrient cycling well below optimum levels. In addition, these plants have a rel ...
Springs and wire plants: anachronistic defences against
... Among these are plant structural defences that persist long after the extinction of the browsers. A peculiar, and controversial, example is a suite of traits common in divaricate (wide-angled branching) plants from New Zealand. Divaricate architecture has been interpreted as an adaptive response to ...
... Among these are plant structural defences that persist long after the extinction of the browsers. A peculiar, and controversial, example is a suite of traits common in divaricate (wide-angled branching) plants from New Zealand. Divaricate architecture has been interpreted as an adaptive response to ...
ECOLOGICAL RELATIONSIDPS BETWEEN SMALL MAMMALS AND CENTRAL ITALY
... Factor 1 (eigenvalue = 2.940 ; % explained variance = 48.997) ordered the species within the multivariate space better than factor 2 (eigenvalue = 1 .5 1 4 ; % explained variance = 25 .240 ; cumulative % of explained variance = 74.237) : it represents the canopy structure, and the highest scores on ...
... Factor 1 (eigenvalue = 2.940 ; % explained variance = 48.997) ordered the species within the multivariate space better than factor 2 (eigenvalue = 1 .5 1 4 ; % explained variance = 25 .240 ; cumulative % of explained variance = 74.237) : it represents the canopy structure, and the highest scores on ...
Burrowing Animals
... risk but are very important for providing burrows for other animals that cannot dig, such as the burrowing owl. It is also an important food source for many animals. Because they are so important to the life cycle of other species they are called a keystone species. American badger’s are also a keys ...
... risk but are very important for providing burrows for other animals that cannot dig, such as the burrowing owl. It is also an important food source for many animals. Because they are so important to the life cycle of other species they are called a keystone species. American badger’s are also a keys ...
Edmonton. High numbers of Blue Jays were again
... continue to remain fairly constant as they have over the past couple of years. Three Northwest Territories counts reported 22 species, up two from last year. The number of Willow Ptarmigan dropped about 20 percent from last year. Numbers in Yellowknife (158) remain essentially unchanged; at Norman W ...
... continue to remain fairly constant as they have over the past couple of years. Three Northwest Territories counts reported 22 species, up two from last year. The number of Willow Ptarmigan dropped about 20 percent from last year. Numbers in Yellowknife (158) remain essentially unchanged; at Norman W ...
Resource Partitioning in Ecological Communities
... but it introduces arbitrariness: if a species becomes too different in morphology or behavior, it is taxonomically defined out of the system, and if it becomes too different in habitat, it is geographically defined out of the system. These effects must differ for different kinds of animals and may b ...
... but it introduces arbitrariness: if a species becomes too different in morphology or behavior, it is taxonomically defined out of the system, and if it becomes too different in habitat, it is geographically defined out of the system. These effects must differ for different kinds of animals and may b ...
Conservation Impact Report 2016
... These habitats are also essential for mammals such as water vole and otters. While otters have made a significant population recovery from virtual extinction across most of England in the 1970s (58.8% positive site records in 2009-1024), water voles continue to be under threat. In 2012 the National ...
... These habitats are also essential for mammals such as water vole and otters. While otters have made a significant population recovery from virtual extinction across most of England in the 1970s (58.8% positive site records in 2009-1024), water voles continue to be under threat. In 2012 the National ...
Influences of the El Niño/Southern Oscillation and the North Atlantic
... surrounding the station. This assumption is supported by an analysis of data from six stations located at Big Oaks National Wildlife Refuge, Indiana, that showed reproductive indices for four forest-interior species increased as a function of mean size of woodland patches within a 4-km radius of the ...
... surrounding the station. This assumption is supported by an analysis of data from six stations located at Big Oaks National Wildlife Refuge, Indiana, that showed reproductive indices for four forest-interior species increased as a function of mean size of woodland patches within a 4-km radius of the ...
Chapter 25: Community Ecology
... is the sum total of all the ways it utilizes the resources of its environment. A niche may be described in terms of space utilization, food consumption, temperature range, appropriate conditions for mating, requirements for moisture, and other factors. Niche is not synonymous with habitat, the place ...
... is the sum total of all the ways it utilizes the resources of its environment. A niche may be described in terms of space utilization, food consumption, temperature range, appropriate conditions for mating, requirements for moisture, and other factors. Niche is not synonymous with habitat, the place ...
Heterospecific courtship, minority effects and niche separation
... competitive exclusion is instead driven by genetic drift and non-resource related selection (reviewed in Gordon, 2000). This might especially apply to phytophagous insects that often experience much lower population densities than the density of their host plant resource (Lawton & Strong, 1981), whi ...
... competitive exclusion is instead driven by genetic drift and non-resource related selection (reviewed in Gordon, 2000). This might especially apply to phytophagous insects that often experience much lower population densities than the density of their host plant resource (Lawton & Strong, 1981), whi ...
Opportunistic exploitation - School of Environmental and Forest
... supplement in the poultry and aquaculture industry. The extra subsidy received from these former discards (Figure 3) has allowed trawlers to further deplete highvalue species whenever they are encountered [11]. Opportunistic exploitation also occurs in small-scale sea cucumber fisheries where multip ...
... supplement in the poultry and aquaculture industry. The extra subsidy received from these former discards (Figure 3) has allowed trawlers to further deplete highvalue species whenever they are encountered [11]. Opportunistic exploitation also occurs in small-scale sea cucumber fisheries where multip ...
Climate Effects on Species
... intentionally or accidentally relocated from their original distribution • If a transplant is successful, it indicates that its potential range is larger than its actual range • Species transplants can disrupt the communities or ecosystems to which they have been introduced ...
... intentionally or accidentally relocated from their original distribution • If a transplant is successful, it indicates that its potential range is larger than its actual range • Species transplants can disrupt the communities or ecosystems to which they have been introduced ...
15 Competition 2010
... MAJOR CONCEPTS 1) Facilitation is the alternative to competition; it is understudied. 2) Consumers compete by using a resource that reduces availability to others. 3) Competition occurs through exploitation of shared resources or direct interference. 4) Responses of plant and animal species to intra ...
... MAJOR CONCEPTS 1) Facilitation is the alternative to competition; it is understudied. 2) Consumers compete by using a resource that reduces availability to others. 3) Competition occurs through exploitation of shared resources or direct interference. 4) Responses of plant and animal species to intra ...
Community Ecology
... But some (e.g. Cavender-Bares et al. 2009) have argued that these processes are not relevant on evolutionary time scales, and argue for a more phylogenetic approach to examining how communities are structured and maintained: On the one hand, environmental filtering will select for species with simil ...
... But some (e.g. Cavender-Bares et al. 2009) have argued that these processes are not relevant on evolutionary time scales, and argue for a more phylogenetic approach to examining how communities are structured and maintained: On the one hand, environmental filtering will select for species with simil ...
Indirect effect of habitat destruction on ecosystems
... is satisfied, then the species Y becomes extinct; no matter how the difference is small, the extinction occurs. When there is an endangered species, it may become extinct by a slight perturbation to its habitat. ...
... is satisfied, then the species Y becomes extinct; no matter how the difference is small, the extinction occurs. When there is an endangered species, it may become extinct by a slight perturbation to its habitat. ...
Identification Booklet
... • Shell serrated and trapeze-shaped, with five obvious spines on each side and three between the eyes; • Colour variable: green, red or yellow; • Two claws of different size; • Tips of its back legs are pointed, slightly flattened and are hairy; ...
... • Shell serrated and trapeze-shaped, with five obvious spines on each side and three between the eyes; • Colour variable: green, red or yellow; • Two claws of different size; • Tips of its back legs are pointed, slightly flattened and are hairy; ...
Large mammal survey using camera traps in the Sikre River in the
... Estimating population sizes and documenting the presence of large- and medium-sized mammals are difficult due to their nocturnal habits and avoidance of human presence. Researchers have used transect count and record of tracks and prints to estimate population size [3-5]. More recently, camera-traps ...
... Estimating population sizes and documenting the presence of large- and medium-sized mammals are difficult due to their nocturnal habits and avoidance of human presence. Researchers have used transect count and record of tracks and prints to estimate population size [3-5]. More recently, camera-traps ...
Summary - GB non-native species secretariat
... and prevent people from accessing or enjoying their local areas. Through predation and outcompeting other organisms they have major detrimental impacts on native species including commercial fisheries. While there are some general INNS management tools, more specific tools and techniques for aquatic ...
... and prevent people from accessing or enjoying their local areas. Through predation and outcompeting other organisms they have major detrimental impacts on native species including commercial fisheries. While there are some general INNS management tools, more specific tools and techniques for aquatic ...
Diversity and Productivity in a Long-Term Grassland Experiment David Tilman,
... We tested the sampling hypothesis that the most productive species determined the effects of diversity (6, 9, 17) by retaining in analyses of year 2000 results only plots containing at least one of the nine species with the highest monoculture total biomass in 2000. Total biomass remained significan ...
... We tested the sampling hypothesis that the most productive species determined the effects of diversity (6, 9, 17) by retaining in analyses of year 2000 results only plots containing at least one of the nine species with the highest monoculture total biomass in 2000. Total biomass remained significan ...
1998cjb
... the 1995 CPER plant checklist includes 52 non-North American exotics (Table 1), as well as 285 species believed to be native to North America. For both natives and exotics, this tally includes locally persistent species as well as transients (Pyšek 1995), but excludes species that were planted local ...
... the 1995 CPER plant checklist includes 52 non-North American exotics (Table 1), as well as 285 species believed to be native to North America. For both natives and exotics, this tally includes locally persistent species as well as transients (Pyšek 1995), but excludes species that were planted local ...
![here [7] - University of Kent](http://s1.studyres.com/store/data/020562337_1-0174e631c17dabc59b753ca69e0b810c-300x300.png)
here [7] - University of Kent
... The meeting included a review of the concept of systematic reviews and existing frameworks for assessing impacts of alien species in order to assist in consolidation of guidelines necessary for creating a protocol for conducting a systematic review to assess the impacts of parrots in Europe. Those t ...
... The meeting included a review of the concept of systematic reviews and existing frameworks for assessing impacts of alien species in order to assist in consolidation of guidelines necessary for creating a protocol for conducting a systematic review to assess the impacts of parrots in Europe. Those t ...
Bifrenaria
Bifrenaria, abbreviated Bif. in horticultural trade, is a genus of plant in family Orchidaceae. It contains 20 species found in Panama, Trinidad and South America. There are no known uses for them, but their abundant, and at first glance artificial, flowers, make them favorites of orchid growers.The genus can be split in two clearly distinct groups: one of highly robust plants with large flowers, that encompass the first species to be classified under the genus Bifrenaria; other of more delicate plants with smaller flowers occasionally classified as Stenocoryne or Adipe. There are two additional species that are normally classified as Bifrenaria, but which molecular analysis indicate to belong to different orchid groups entirely. One is Bifrenaria grandis which is endemic to Bolívia and which is now placed in Lacaena, and Bifrenaria steyermarkii, an inhabitant of the northern Amazon Forest, which does not have an alternative classification.