Latitudinal gradients of species richness
... We determined the degree to which area accounted for latitudinal variation in species richness of bats from a variety of regression perspectives. We evaluated if a latitudinal gradient of area exists at the focal scale of biomes or at the focal scale of provinces by regressing area on the mid-point ...
... We determined the degree to which area accounted for latitudinal variation in species richness of bats from a variety of regression perspectives. We evaluated if a latitudinal gradient of area exists at the focal scale of biomes or at the focal scale of provinces by regressing area on the mid-point ...
CONSERVATION PLANNING IN THE GREATER ADDO NATIONAL
... predation can have a twofold effect on prey species, namely on their population dynamics and on their behaviour. It is not practical and feasible to depict spatially the processes listed in Table 1. These potentially occur throughout all Mammal Habitat Classes (MHCs) in the GANP planning domain. Som ...
... predation can have a twofold effect on prey species, namely on their population dynamics and on their behaviour. It is not practical and feasible to depict spatially the processes listed in Table 1. These potentially occur throughout all Mammal Habitat Classes (MHCs) in the GANP planning domain. Som ...
FA Schott - Biodiversity New Zealand
... As a land of varied landscapes – with rugged mountains, rolling hills and wide plains – and a wide range in latitude from subtropical to subantarctic5, the country offers a huge variety of living conditions throughout the islands, thus allowing a multitude of animals and plants characterized by utmo ...
... As a land of varied landscapes – with rugged mountains, rolling hills and wide plains – and a wide range in latitude from subtropical to subantarctic5, the country offers a huge variety of living conditions throughout the islands, thus allowing a multitude of animals and plants characterized by utmo ...
ORIGIN OF EXTANT COELACANTHS
... (about 365 million years ago) and the peak of diversity was Early Triassic (from about 248 million years ago to 242 million years ago). The latest fossil record is Macropoma from Late Cretaceous (about 90 million years ago). Extant coelacanths live in deep sea, but fossil species lived in both fresh ...
... (about 365 million years ago) and the peak of diversity was Early Triassic (from about 248 million years ago to 242 million years ago). The latest fossil record is Macropoma from Late Cretaceous (about 90 million years ago). Extant coelacanths live in deep sea, but fossil species lived in both fresh ...
Freshwater Fishes - Department of Environment, Water and Natural
... involved could divert effort to rescue populations of freshwater fish stranded by the dry conditions. Despite, or perhaps exaggerated by, their relatively low profile, freshwater fish are a group under threat worldwide. Australia is no exception, with 40 of its 300 known species currently listed in ...
... involved could divert effort to rescue populations of freshwater fish stranded by the dry conditions. Despite, or perhaps exaggerated by, their relatively low profile, freshwater fish are a group under threat worldwide. Australia is no exception, with 40 of its 300 known species currently listed in ...
Environ
... regulate the microbiological activities in river [26-27]. Sovik and Syversen (2008) found that the water quality is closely related to the riparian vegetative cover and hence the later can be used as an important tool to assess the changes in water quality, biodiversity and river health [28]. Beside ...
... regulate the microbiological activities in river [26-27]. Sovik and Syversen (2008) found that the water quality is closely related to the riparian vegetative cover and hence the later can be used as an important tool to assess the changes in water quality, biodiversity and river health [28]. Beside ...
African Elephant
... Elephant Background: Elephants are the largest land animals in the world. There are two species of elephant; African elephants and Asian elephants. The two species play similar roles ecologically, but differ in physical characteristics and range. African Elephant: African elephants are found in sub- ...
... Elephant Background: Elephants are the largest land animals in the world. There are two species of elephant; African elephants and Asian elephants. The two species play similar roles ecologically, but differ in physical characteristics and range. African Elephant: African elephants are found in sub- ...
Niche partitioning in a sympatric cryptic species complex
... complex, comparing the degree to which species vary in different niche dimensions. Approximately 250 species of bumblebees exist worldwide, distributed across the temperate, alpine, and arctic regions of the Northern Hemisphere and also South America. In much of this range, it is common for multiple ...
... complex, comparing the degree to which species vary in different niche dimensions. Approximately 250 species of bumblebees exist worldwide, distributed across the temperate, alpine, and arctic regions of the Northern Hemisphere and also South America. In much of this range, it is common for multiple ...
Species composition and abundance of penaeid
... shrimps live and spawn in deeper water away from the shore. Most species are found naturally in shallow, inshore tropical and subtropical waters and many have been artificially cultured in ponds (Holthuis, 1980). The penaeid prawns, or shrimps as they are referred to outside the Indian and western P ...
... shrimps live and spawn in deeper water away from the shore. Most species are found naturally in shallow, inshore tropical and subtropical waters and many have been artificially cultured in ponds (Holthuis, 1980). The penaeid prawns, or shrimps as they are referred to outside the Indian and western P ...
Species diversity, invasion success, and ecosystem functioning
... is poor (e.g. soft-bodied ascidians), so the actual status of some of these species as natives or invader is uncertain. All the species we refer to as ‘native’ were present in the system at the time that humans began studying them, usually in the mid-1800s (see references in Van Name 1945). We thus ...
... is poor (e.g. soft-bodied ascidians), so the actual status of some of these species as natives or invader is uncertain. All the species we refer to as ‘native’ were present in the system at the time that humans began studying them, usually in the mid-1800s (see references in Van Name 1945). We thus ...
This talk will be about patterns of species diversity
... 1. Methods that examine the extent of the difference between two or more areas of α diversity relative to γ diversity, where γ diversity is measured as total species richness. These measures were originally and explicitly proposed as the measures of β diversity. Alpha diversity is averaged across al ...
... 1. Methods that examine the extent of the difference between two or more areas of α diversity relative to γ diversity, where γ diversity is measured as total species richness. These measures were originally and explicitly proposed as the measures of β diversity. Alpha diversity is averaged across al ...
Redalyc.Phylogenetic position of Mexican jackrabbits within the
... Departamento de Ecología de la Biodiversidad, Instituto de Ecología, Universidad Nacional Autónoma de México, Apartado postal 70-275, 04510 México, D.F., México. ...
... Departamento de Ecología de la Biodiversidad, Instituto de Ecología, Universidad Nacional Autónoma de México, Apartado postal 70-275, 04510 México, D.F., México. ...
Genetic diversity within vertebrate species is greater at lower
... vertebrate species that together span six continents, two oceans, and 129 degrees of latitude, we found significantly greater genetic diversity at low latitudes within mammalian species, and trends consistent with this pattern in reptiles, amphibians, fish, and birds. The signal held even after remo ...
... vertebrate species that together span six continents, two oceans, and 129 degrees of latitude, we found significantly greater genetic diversity at low latitudes within mammalian species, and trends consistent with this pattern in reptiles, amphibians, fish, and birds. The signal held even after remo ...
Species diversity: from global decreases to local
... present in a region. Therefore, the net effect of exotic species on species diversity is determined by the balance between the species extinctions (or extirpations) that they cause or facilitate and the number of exotic species that become established. Essentially, the issue is whether, on average, ...
... present in a region. Therefore, the net effect of exotic species on species diversity is determined by the balance between the species extinctions (or extirpations) that they cause or facilitate and the number of exotic species that become established. Essentially, the issue is whether, on average, ...
MONTEVERDE GOLDEN TOAD Remaining Population: Unknown
... In 1987, the golden toad was closely studied by an American ecologist and herpetologist who, by chance, happened upon its breeding spectacle. She described it as brief and breathtaking; the males looked like "little jewels on the forest floor." She was so fascinated that she applied for a grant to r ...
... In 1987, the golden toad was closely studied by an American ecologist and herpetologist who, by chance, happened upon its breeding spectacle. She described it as brief and breathtaking; the males looked like "little jewels on the forest floor." She was so fascinated that she applied for a grant to r ...
Do communitylevel models describe community variation effectively?
... the ‘assemble and predict together’ strategies are expected to extrapolate beyond known assemblages. The authors also clarify that the ‘predict first, assemble later’ strategy does not consider patterns of species co-occurrence in the modelling process, whereas the ‘assemble and predict together’ st ...
... the ‘assemble and predict together’ strategies are expected to extrapolate beyond known assemblages. The authors also clarify that the ‘predict first, assemble later’ strategy does not consider patterns of species co-occurrence in the modelling process, whereas the ‘assemble and predict together’ st ...
Species diversity: from global decreases to local increases
... present in a region. Therefore, the net effect of exotic species on species diversity is determined by the balance between the species extinctions (or extirpations) that they cause or facilitate and the number of exotic species that become established. Essentially, the issue is whether, on average, ...
... present in a region. Therefore, the net effect of exotic species on species diversity is determined by the balance between the species extinctions (or extirpations) that they cause or facilitate and the number of exotic species that become established. Essentially, the issue is whether, on average, ...
Phytosociological Studies on the Vegetation at Kui Block Field
... from the surrounding vegetation by the dominance of deciduous trees and species composition of the vegetation. A Iittle accumulation of litter is found on the ground. Soil is not recognized due to the extreme lithic condition. Although the kind of the vegetation unit is found in the entire areas of ...
... from the surrounding vegetation by the dominance of deciduous trees and species composition of the vegetation. A Iittle accumulation of litter is found on the ground. Soil is not recognized due to the extreme lithic condition. Although the kind of the vegetation unit is found in the entire areas of ...
Energy, Density, and Constraints to Species Richness: Ant
... productivity (NPP) through two relationships: NPP limits a taxon’s density, and taxon density limits species richness. We study both relationships with a survey of 15 ground ant assemblages, along a productivity gradient from deserts to rain forests. Ant density (colonies m22) was a positive, decele ...
... productivity (NPP) through two relationships: NPP limits a taxon’s density, and taxon density limits species richness. We study both relationships with a survey of 15 ground ant assemblages, along a productivity gradient from deserts to rain forests. Ant density (colonies m22) was a positive, decele ...
Strong asymmetrical inter-specific relationships in food web
... top 5%). We did not consider relationships that are strong in both directions: this kind of symmetry makes inter-specific relationships unclear and unpredictable, while asymmetrical relationships may provide more insights about the flow of indirect effects in ecosystems. It is important to emphasize ...
... top 5%). We did not consider relationships that are strong in both directions: this kind of symmetry makes inter-specific relationships unclear and unpredictable, while asymmetrical relationships may provide more insights about the flow of indirect effects in ecosystems. It is important to emphasize ...
Community Dynamics of Insular Biotas in Space and Time
... time’ (Whittaker 1998). Hitherto, there are no studies that have examined the stability in nestedness or whether future turnover could be predicted from nestedness. In paper III, I examine whether nestedness and related characteristic of species and islands were stable over a period of some 30 years ...
... time’ (Whittaker 1998). Hitherto, there are no studies that have examined the stability in nestedness or whether future turnover could be predicted from nestedness. In paper III, I examine whether nestedness and related characteristic of species and islands were stable over a period of some 30 years ...
Opposing intraspecific vs. interspecific diversity effects on
... Tree species richness promoted growth but had no effect on herbivory. In contrast, SF diversity reduced growth and increased herbivory but only so in species mixtures. Most of the observed effects were time dependent, with the largest effect found in 2013. Our results suggest that biodiversity can a ...
... Tree species richness promoted growth but had no effect on herbivory. In contrast, SF diversity reduced growth and increased herbivory but only so in species mixtures. Most of the observed effects were time dependent, with the largest effect found in 2013. Our results suggest that biodiversity can a ...
Floristic composition and environmental determinants of pine forests
... The warm, dry sites are characterised by xero-mesophytic species such as Antennaria dioica, Chimaphila umbellata and Pyrola chlorantha (ERMAKOV et al. 2000, ERMAKOV & MAKHATKOV 2011). On moister sites, the abundance of Vaccinium myrtillus and V. vitis-idaea increases, whereas the occurrence of Ledum ...
... The warm, dry sites are characterised by xero-mesophytic species such as Antennaria dioica, Chimaphila umbellata and Pyrola chlorantha (ERMAKOV et al. 2000, ERMAKOV & MAKHATKOV 2011). On moister sites, the abundance of Vaccinium myrtillus and V. vitis-idaea increases, whereas the occurrence of Ledum ...
Comparative Analysis of Diversity and Similarity Indices with Special
... observed values can be related at any combination of sample sizes at the experimental sites. This paper examines the effects of sample size and diversity on the expected values of diversity indices and similarity indices, using various formulae. It has been shown that all indices are strongly affect ...
... observed values can be related at any combination of sample sizes at the experimental sites. This paper examines the effects of sample size and diversity on the expected values of diversity indices and similarity indices, using various formulae. It has been shown that all indices are strongly affect ...
How Wild is Vild Campus - Det Natur
... Halictidae are eusocial, meaning that they live in small, short-lived colonies, with minimal social agreement. Only bumblebees live in social organized societies with a queen, workers and males. The foraging pattern and preference is not consistent either for all bees. Solitary bees have a significa ...
... Halictidae are eusocial, meaning that they live in small, short-lived colonies, with minimal social agreement. Only bumblebees live in social organized societies with a queen, workers and males. The foraging pattern and preference is not consistent either for all bees. Solitary bees have a significa ...
Fauna of Africa
Fauna of Africa, in its broader sense, is all the animals living in Africa and its surrounding seas and islands. The more characteristic African fauna is found in the Afrotropical ecoregion. Lying almost entirely within the tropics, and equally to north and south of the equator creates favourable conditions for rich wildlife.