The introduction of alien mammals into the broader Western and
... of the receiving system. This can be understood in terms of the habitat available in the receiving areas, as well as the existence of comparable species naturally occurring in an area. The former aspect relates to the availability of food, such as grazing, and shelter for the introduced species, whe ...
... of the receiving system. This can be understood in terms of the habitat available in the receiving areas, as well as the existence of comparable species naturally occurring in an area. The former aspect relates to the availability of food, such as grazing, and shelter for the introduced species, whe ...
Malay Civet Population Project
... were seen to track the abundance of snowshoe hares Lepus americanus. Population cycling is easily generated in model predator-prey systems and arises due to “delayed density dependence”, the time lag between the effect of the predator abundance on prey ...
... were seen to track the abundance of snowshoe hares Lepus americanus. Population cycling is easily generated in model predator-prey systems and arises due to “delayed density dependence”, the time lag between the effect of the predator abundance on prey ...
Appendix A: Freshwater Mussels
... where their habitat requirements are met throughout the region, they occur at a low abundance throughout their range. Mussel species are especially sensitive to pollutants, oxygen levels and temperature levels, making them important indicators of waterbody health. ...
... where their habitat requirements are met throughout the region, they occur at a low abundance throughout their range. Mussel species are especially sensitive to pollutants, oxygen levels and temperature levels, making them important indicators of waterbody health. ...
AND SPECIES RICHNESS
... new functionalgroupsare added,but less rapidlywhen new species areredundant of existing functional groups. Lawton (102) proposed a model in which species may have strong,idiosyncraticeffects on ecosystems. If this is the case, thereis no predictableeffect of species richnessper se on ecosystem funct ...
... new functionalgroupsare added,but less rapidlywhen new species areredundant of existing functional groups. Lawton (102) proposed a model in which species may have strong,idiosyncraticeffects on ecosystems. If this is the case, thereis no predictableeffect of species richnessper se on ecosystem funct ...
Paper - Journal of Environmental Biology
... In the present work we studied the taxonomic composition and temporal fluctuation of the planktonic ciliate assemblage in Lake Tezozomoc, Mexico City, a small and hypertrophic urban pond. A discussion about the taxonomic composition, density and biomass contribution of the different ciliate trophic ...
... In the present work we studied the taxonomic composition and temporal fluctuation of the planktonic ciliate assemblage in Lake Tezozomoc, Mexico City, a small and hypertrophic urban pond. A discussion about the taxonomic composition, density and biomass contribution of the different ciliate trophic ...
Diversity effects on production in different light and fertility
... was performed using only the SS for species composition and including species presence-absence (dummy variables) and richness terms in separate models. In this way, the significance of species richness as a determinant of production could be assessed against both compositional variation and the full ...
... was performed using only the SS for species composition and including species presence-absence (dummy variables) and richness terms in separate models. In this way, the significance of species richness as a determinant of production could be assessed against both compositional variation and the full ...
... research in other locations (pers. obs.) indicate that these beds contain large numbers of small (<3 cm) sunfish which would be strong predators on zooplankton. The dominant species of rotifers clearly change during the year. We suggest that these changes are controlled by lake conditions (Fig 4), f ...
SOUTH DElTfl UlATfR R G f ~...
... reduction in the San Joaquin River, but it is clearly not the only cause of that reduction and is not an increasing cause. The CVP salt load has impacted agriculture along the main stem and in the south Delta, but it is not clear what effect it has had on each of various aspects of the ecology in an ...
... reduction in the San Joaquin River, but it is clearly not the only cause of that reduction and is not an increasing cause. The CVP salt load has impacted agriculture along the main stem and in the south Delta, but it is not clear what effect it has had on each of various aspects of the ecology in an ...
Chapter 11
... – (a) Wave force can detach higher profile individuals – Clustering can protect from wave shock (as well as preventing excessive desiccation). – (b) Wave force is indirect – reduced or dissipated some – (c) Too dense can be a problem sometimes ...
... – (a) Wave force can detach higher profile individuals – Clustering can protect from wave shock (as well as preventing excessive desiccation). – (b) Wave force is indirect – reduced or dissipated some – (c) Too dense can be a problem sometimes ...
CHAPTER 10. Nekton - The Narragansett Bay National Estuarine
... to increase over time, mostly due to increases in small pelagic schooling fish such as Atlantic menhaden and bay anchovy. In fact, these data have documented a shift in species abundance patterns in Narragansett Bay. The Bay is undergoing a shift from a community dominated by demersal species to a sy ...
... to increase over time, mostly due to increases in small pelagic schooling fish such as Atlantic menhaden and bay anchovy. In fact, these data have documented a shift in species abundance patterns in Narragansett Bay. The Bay is undergoing a shift from a community dominated by demersal species to a sy ...
EBSA`s: Concepts and Metrics - Centre for Marine Biodiversity
... subarea, restricted in its distribution within the study area or wider region? - Are there structural habitat features present in the ...
... subarea, restricted in its distribution within the study area or wider region? - Are there structural habitat features present in the ...
B I O D I V E R S I... R E S E A R C H
... composition of each plot. We used the percent cover of plant species in each plot to derive plant species loadings for fen and forest habitats. We excluded from the analysis plant species that did not occur in at least three sites. Analyses were conducted using - version 4.01 (McCune & Mefford, ...
... composition of each plot. We used the percent cover of plant species in each plot to derive plant species loadings for fen and forest habitats. We excluded from the analysis plant species that did not occur in at least three sites. Analyses were conducted using - version 4.01 (McCune & Mefford, ...
Concepts of species and modes of speciation
... group of potentially or actually interbreeding natural populations which are reproductively isolated from other such groups. Dobzhansky9 , being an evolutionary geneticist, added the term gene pool, and defined species as a reproductive community of sexually and cross-fertilizing individuals which s ...
... group of potentially or actually interbreeding natural populations which are reproductively isolated from other such groups. Dobzhansky9 , being an evolutionary geneticist, added the term gene pool, and defined species as a reproductive community of sexually and cross-fertilizing individuals which s ...
Research Guidelines - IUCN Otter Specialist Group
... Otters in the ecosystem: their effects on fish and bird populations, incl. endangered species, fish farms. Amphibian populations and otters. Diseases and populations. Habituation to people and other hazards. Survival after dispersal (natural and after introductions). Mortality: what are effects on p ...
... Otters in the ecosystem: their effects on fish and bird populations, incl. endangered species, fish farms. Amphibian populations and otters. Diseases and populations. Habituation to people and other hazards. Survival after dispersal (natural and after introductions). Mortality: what are effects on p ...
COMMUNITY INVASIBILITY, RECRUITMENT LIMITATION, AND GRASSLAND BIODIVERSITY D T
... Field D (Tilman 1987), that has never been cut or cultivated and has been free of domestic livestock grazing for .50 yr. It has been maintained as savanna by prescribed spring burning in two of every three years for the past 30 yr (White 1983, Tester 1989). It was burned in early May of 1991, 1993, ...
... Field D (Tilman 1987), that has never been cut or cultivated and has been free of domestic livestock grazing for .50 yr. It has been maintained as savanna by prescribed spring burning in two of every three years for the past 30 yr (White 1983, Tester 1989). It was burned in early May of 1991, 1993, ...
State of Britain`s Mammals 2008 - People`s Trust for Endangered
... the movements of people, resources, money, species or pathogens, globalisation has reached a level that most conservation problems are affected by supra-national forces, and often need solutions at this larger scale too. It is timely, therefore, that 2008 saw a new global assessment of mammal conser ...
... the movements of people, resources, money, species or pathogens, globalisation has reached a level that most conservation problems are affected by supra-national forces, and often need solutions at this larger scale too. It is timely, therefore, that 2008 saw a new global assessment of mammal conser ...
Are Species Adapted to Their Regeneration Niche, Adult Niche, or
... with a flatbed scanner, after which one or several leaf punches were taken from the leaf blade, excluding the midrib or large veins. Leaf blade and punches were ovendried for 48 h at 70⬚C and weighed. The SLA (in m2 kg⫺1) was calculated as the leaf blade area divided by the leaf dry mass and the pun ...
... with a flatbed scanner, after which one or several leaf punches were taken from the leaf blade, excluding the midrib or large veins. Leaf blade and punches were ovendried for 48 h at 70⬚C and weighed. The SLA (in m2 kg⫺1) was calculated as the leaf blade area divided by the leaf dry mass and the pun ...
Host ontogeny and the temporal decay of similarity in parasite
... shared by both. The Bray-Curtis index also takes into account differences in abundances of each shared parasite species. Both indices have values potentially ranging from 0 (no species in common) to 100 (all species shared, and in the case of the Bray-Curtis index, all having identical abundances). ...
... shared by both. The Bray-Curtis index also takes into account differences in abundances of each shared parasite species. Both indices have values potentially ranging from 0 (no species in common) to 100 (all species shared, and in the case of the Bray-Curtis index, all having identical abundances). ...
Impact of Argentine ants (Linepithema humile) on an arboreal ant
... Thus, like many communities of ants, this community is greatly influenced by interspecific competition, making it especially sensitive to any disturbance, such as the introduction of exotic species (Suarez et al. 1998; Kaspari 2000). Native species richness, for example, was proportionally related t ...
... Thus, like many communities of ants, this community is greatly influenced by interspecific competition, making it especially sensitive to any disturbance, such as the introduction of exotic species (Suarez et al. 1998; Kaspari 2000). Native species richness, for example, was proportionally related t ...
Species richness and environmental fluctuation affect population
... species. More direct evidence for the significant role of species interactions comes from experimental work by Vasseur and Fox (2009), who have demonstrated that both dispersal and the Moran effect (i.e., the correlated environmental variation that induces synchronization among initially independent ...
... species. More direct evidence for the significant role of species interactions comes from experimental work by Vasseur and Fox (2009), who have demonstrated that both dispersal and the Moran effect (i.e., the correlated environmental variation that induces synchronization among initially independent ...
Ecological Society of America - Wentworth Group of Concerned
... 153o30’ longitude and –26o30’ and –28o00’ latitudes (six 1:100,000 scale map sheets) from southeast Queensland, Australia, as this was an area with relatively high data density from this period. We selected this dataset for its long time frame and non-standardized methodology. Reporting rates on sho ...
... 153o30’ longitude and –26o30’ and –28o00’ latitudes (six 1:100,000 scale map sheets) from southeast Queensland, Australia, as this was an area with relatively high data density from this period. We selected this dataset for its long time frame and non-standardized methodology. Reporting rates on sho ...
The Significance of Coarse Woody Debris for the Diversity of Soil
... fermentation, and humus layers are removed. Sites that are burned initially to control hardwood competition may be recolonized at a more rapid rate if woody debris serves as a refuge. Loblolly pine stands in the Coastal Plain often receive prescribed fuel-reduction burns every 3 to 5 years until the ...
... fermentation, and humus layers are removed. Sites that are burned initially to control hardwood competition may be recolonized at a more rapid rate if woody debris serves as a refuge. Loblolly pine stands in the Coastal Plain often receive prescribed fuel-reduction burns every 3 to 5 years until the ...
The Roots of Diversity: Below Ground Species Richness and
... Background: Plants interact with each other, nutrients, and microbial communities in soils through extensive root networks. Understanding these below ground interactions has been difficult in natural systems, particularly those with high plant species diversity where morphological identification of ...
... Background: Plants interact with each other, nutrients, and microbial communities in soils through extensive root networks. Understanding these below ground interactions has been difficult in natural systems, particularly those with high plant species diversity where morphological identification of ...
"Species Richness: Small Scale". In: Encyclopedia of Life Sciences
... very difficult in practice to determine what species should be included in the regional, local and actual species pools. For example, it can be difficult to determine what portion of the species in a region could potentially persist in any given site. For the actual species pool it can be difficult and ar ...
... very difficult in practice to determine what species should be included in the regional, local and actual species pools. For example, it can be difficult to determine what portion of the species in a region could potentially persist in any given site. For the actual species pool it can be difficult and ar ...
Effectiveness of scat-detection dogs in determining species
... detectores fueron una herramienta de muestreo efectiva para estas especies raras aun cuando se requirieron probabilidades de detección precisas. Consideramos que la manera en que utilizamos los perros detectores de excretas para determinar la presencia de especies se puede ampliar para la detecció ...
... detectores fueron una herramienta de muestreo efectiva para estas especies raras aun cuando se requirieron probabilidades de detección precisas. Consideramos que la manera en que utilizamos los perros detectores de excretas para determinar la presencia de especies se puede ampliar para la detecció ...