5-2 Limits to Growth
... Density-dependent factors operate only when the population density reaches a certain level. These factors operate most strongly when a population is large and dense. They do not affect small, scattered populations as greatly. ...
... Density-dependent factors operate only when the population density reaches a certain level. These factors operate most strongly when a population is large and dense. They do not affect small, scattered populations as greatly. ...
Towards a trait-based quantification of species
... traits related to fire disturbance (Lavorel and Garnier 2002). Comparative approaches have established empirical relationships (i) between functional traits and performance currencies (e.g. Poorter and Bongers 2006; Wright and Westoby 2001; Wright et al. 2004) and (ii) between functional response tr ...
... traits related to fire disturbance (Lavorel and Garnier 2002). Comparative approaches have established empirical relationships (i) between functional traits and performance currencies (e.g. Poorter and Bongers 2006; Wright and Westoby 2001; Wright et al. 2004) and (ii) between functional response tr ...
IMPACTS OF BIOLOGICAL INVASIONS ON FRESHWATER
... observed in species-poor systems such as alpine lakes, desert pools, isolated springs and oligotrophic waters (Moyle & Light 1996), but other studies have demonstrated that even species-rich freshwater systems are vulnerable to disruption. For example, North American rivers contain the planet’s rich ...
... observed in species-poor systems such as alpine lakes, desert pools, isolated springs and oligotrophic waters (Moyle & Light 1996), but other studies have demonstrated that even species-rich freshwater systems are vulnerable to disruption. For example, North American rivers contain the planet’s rich ...
Interaction strengths in food webs
... different research programmes (Austin 1999). This awareness is a critical first step for identifying synthetic opportunities where apparently divergent lines of research are actually two sides of the same coin. It encourages additional lines of inquiry into how these different questions are related. ...
... different research programmes (Austin 1999). This awareness is a critical first step for identifying synthetic opportunities where apparently divergent lines of research are actually two sides of the same coin. It encourages additional lines of inquiry into how these different questions are related. ...
Loss of Diversification of fish species in Meerut region: A... to natural fauna Shobhna , Manu varma
... excellent sources of polyunsaturated fatty acids. The status of health depends on the fish’s genetic composition, prior history and the quality of the present environment for both, the fish and the pathogen. Environmental factors that are stressful to fish may actually provide a more optimal environ ...
... excellent sources of polyunsaturated fatty acids. The status of health depends on the fish’s genetic composition, prior history and the quality of the present environment for both, the fish and the pathogen. Environmental factors that are stressful to fish may actually provide a more optimal environ ...
Duties to Ecosystems
... without the other.7 Here too, as with predators and prey, being eaten is not always a bad thing. Selection pressures will routinely drive adaptation and counteradaptation toward minimum disturbance, that is, to check competitions by forced cooperations. An ecosystem is an imposing critical system, w ...
... without the other.7 Here too, as with predators and prey, being eaten is not always a bad thing. Selection pressures will routinely drive adaptation and counteradaptation toward minimum disturbance, that is, to check competitions by forced cooperations. An ecosystem is an imposing critical system, w ...
Interaction strengths in food webs - Centre for Biodiversity Theory
... different research programmes (Austin 1999). This awareness is a critical first step for identifying synthetic opportunities where apparently divergent lines of research are actually two sides of the same coin. It encourages additional lines of inquiry into how these different questions are related. ...
... different research programmes (Austin 1999). This awareness is a critical first step for identifying synthetic opportunities where apparently divergent lines of research are actually two sides of the same coin. It encourages additional lines of inquiry into how these different questions are related. ...
Indirect Effects of Introduced Predators on Seabird Islands
... groups (Chapter 3), the vast majority can be classified into one of three categories depending on their trophic position (see Chapters 3 and 4 for details on specific species; Figure 9.1, shaded boxes). A top predator is the highest order, or apex, predator in a food chain. Mesopredators are any oth ...
... groups (Chapter 3), the vast majority can be classified into one of three categories depending on their trophic position (see Chapters 3 and 4 for details on specific species; Figure 9.1, shaded boxes). A top predator is the highest order, or apex, predator in a food chain. Mesopredators are any oth ...
The Demographic Basis of Population Regulation in Columbian
... a 183-km distance along the Continental Divide (map in Dobson 1994). All ground squirrels in these populations were kill trapped with Conibear traps, and individuals were aged from microscopic examination of layers of bone deposition in the periosteum of the lower jaw. Age distributions were used to ...
... a 183-km distance along the Continental Divide (map in Dobson 1994). All ground squirrels in these populations were kill trapped with Conibear traps, and individuals were aged from microscopic examination of layers of bone deposition in the periosteum of the lower jaw. Age distributions were used to ...
to view - Scottish Natural Heritage
... seamounts to the west of Scotland. They aggregate to spawn around seamounts (OSPAR 2010). The main site of spawning aggregations in Scottish waters is believed to be the Hebrides Terrace Seamount which was the location of a target fishery for the species in the early 1990s (ICES, 2011). Catches from ...
... seamounts to the west of Scotland. They aggregate to spawn around seamounts (OSPAR 2010). The main site of spawning aggregations in Scottish waters is believed to be the Hebrides Terrace Seamount which was the location of a target fishery for the species in the early 1990s (ICES, 2011). Catches from ...
Directing Research to Reduce the Impacts of
... 1989; Mack 1996). Similarly, better information on lowimpact invasive species will help identify characteristics that set high-impact nonindigenous species apart, giving us greater understanding of the relative harm a new introduction may cause. Just as not all nonindigenous species have large effec ...
... 1989; Mack 1996). Similarly, better information on lowimpact invasive species will help identify characteristics that set high-impact nonindigenous species apart, giving us greater understanding of the relative harm a new introduction may cause. Just as not all nonindigenous species have large effec ...
SVWS work plan 11-00 - Sonoma Valley Knowledge Base
... Self-sustaining populations of all native plant and animal species, including humans ...
... Self-sustaining populations of all native plant and animal species, including humans ...
Trade-offs in community ecology: linking spatial scales and species
... coexistence occurring at local or regional spatial scales, trade-offs are typically approached at a single scale. In recent years, ecologists have increasingly provided evidence for the importance of community processes at both local and regional spatial scales. This review summarizes the theoretica ...
... coexistence occurring at local or regional spatial scales, trade-offs are typically approached at a single scale. In recent years, ecologists have increasingly provided evidence for the importance of community processes at both local and regional spatial scales. This review summarizes the theoretica ...
a full - British Ecological Society
... 4. Thus, theory says that species interactions are a necessary but not sufficient condition for local saturation in ecological time. 5. We then argue that unsaturated (Type I) assemblages are likely to be ubiquitous in nature and that even saturated (Type II) assemblages may not show hard limits to ...
... 4. Thus, theory says that species interactions are a necessary but not sufficient condition for local saturation in ecological time. 5. We then argue that unsaturated (Type I) assemblages are likely to be ubiquitous in nature and that even saturated (Type II) assemblages may not show hard limits to ...
Sequences of the Nucleocapsid Genes from Two Strains of Avian
... residues respectively, for which the clustering is even more marked. In the Beaudette sequence for example there is a stretch of 28 amino acids from bases 594 to 677 which contains nine out of the total number of 28 serine residues. Outside the predicted coding region the major difference between th ...
... residues respectively, for which the clustering is even more marked. In the Beaudette sequence for example there is a stretch of 28 amino acids from bases 594 to 677 which contains nine out of the total number of 28 serine residues. Outside the predicted coding region the major difference between th ...
Ecosystems - WordPress.com
... When listening to the presentations, find out; • The temperature and rainfall expected in this ecosystem. • An example of a plant and animal found there. • A human influence affecting that ecosystem. ...
... When listening to the presentations, find out; • The temperature and rainfall expected in this ecosystem. • An example of a plant and animal found there. • A human influence affecting that ecosystem. ...
LOCAL AND REGIONAL PATTERNS OF SPECIES RICHNESS IN
... of calcicole than calcifuge species. This pattern is also found at the level of local species richness, where it is, however, less clearly pronounced, possibly due to the predominance of a few widespread and generalist calcifuges in acidic habitats. The unimodal pattern found in mires may result fro ...
... of calcicole than calcifuge species. This pattern is also found at the level of local species richness, where it is, however, less clearly pronounced, possibly due to the predominance of a few widespread and generalist calcifuges in acidic habitats. The unimodal pattern found in mires may result fro ...
the eastern quoll - Australian Wildlife Society
... revealed that the parasite did not affect either quoll survival or reproduction. As the parasite is primarily spread by cats, the high prevalence at declined quoll sites actually signalled a higher cat density at these sites, suggesting that feral cats may be suppressing quoll recovery through preda ...
... revealed that the parasite did not affect either quoll survival or reproduction. As the parasite is primarily spread by cats, the high prevalence at declined quoll sites actually signalled a higher cat density at these sites, suggesting that feral cats may be suppressing quoll recovery through preda ...
Reid`s Paradox Revisited: The Evolution of Dispersal Kernels during
... After reproduction, all offspring were given the opportunity to disperse, and all parents died. Individuals dispersed in random directions, with displacement calculated according to a correlated walk determined by three traits inherited from their parents: average distance moved per day (distday, ex ...
... After reproduction, all offspring were given the opportunity to disperse, and all parents died. Individuals dispersed in random directions, with displacement calculated according to a correlated walk determined by three traits inherited from their parents: average distance moved per day (distday, ex ...
Community Ecology
... H. A. Gleason, challenged whether communities were at equilibrium • Recent evidence of change has led to a nonequilibrium model, which describes communities as constantly changing after being buffeted by disturbances • A disturbance is an event that changes a community, removes organisms from it, an ...
... H. A. Gleason, challenged whether communities were at equilibrium • Recent evidence of change has led to a nonequilibrium model, which describes communities as constantly changing after being buffeted by disturbances • A disturbance is an event that changes a community, removes organisms from it, an ...
Evolutionary History Uniting History and Biology to Understand Life
... crop-eating insects. (Because we are talking about populations of animals rather than single individuals, we will make some species in the story plural.) The cats that ate the rats that ate the malt in the house that Jack built were predators akin to insects that prey on other insects. Now let us mo ...
... crop-eating insects. (Because we are talking about populations of animals rather than single individuals, we will make some species in the story plural.) The cats that ate the rats that ate the malt in the house that Jack built were predators akin to insects that prey on other insects. Now let us mo ...
pdf - Gunnar Brehm
... and was performed separately for Geometridae and the two largest subfamilies Ennominae and Larentiinae. The remaining subfamilies (Desmobathrinae, Geometrinae, Oenochrominae, and Sterrhinae) were not analysed separately because of their low representation in the samples. ...
... and was performed separately for Geometridae and the two largest subfamilies Ennominae and Larentiinae. The remaining subfamilies (Desmobathrinae, Geometrinae, Oenochrominae, and Sterrhinae) were not analysed separately because of their low representation in the samples. ...
Habitat destruction and metacommunity size in pen
... 2000; Gonzalez 2000; Fahrig 2003). If the habitat is already spatially structured (or has been fragmented), such that established smaller ‘local’ communities occur as patches, then large-scale destruction can eliminate entire local communities, affecting both the density and distance among local pat ...
... 2000; Gonzalez 2000; Fahrig 2003). If the habitat is already spatially structured (or has been fragmented), such that established smaller ‘local’ communities occur as patches, then large-scale destruction can eliminate entire local communities, affecting both the density and distance among local pat ...