Population Dynamics of the Northern Spotted Owl
... less at sites positive effect on NSO site extinction withold good habitat Less forest higher site extinction rates Less fragmented old forest higher colonization rates ...
... less at sites positive effect on NSO site extinction withold good habitat Less forest higher site extinction rates Less fragmented old forest higher colonization rates ...
Eastern freshwater cod - NSW Department of Primary Industries
... in NSW and detailed progress made toward meeting the recovery plan objectives. The review found that many specific recovery plan objectives have been completed over the last 10 years or are ongoing. There has been a significant increase in the understanding of the size, distribution, ecological requ ...
... in NSW and detailed progress made toward meeting the recovery plan objectives. The review found that many specific recovery plan objectives have been completed over the last 10 years or are ongoing. There has been a significant increase in the understanding of the size, distribution, ecological requ ...
A hierarchical view of habitat and its relationship to species
... (see later). Third, the pattern of abundance could be produced by metapopulation dynamics (Hanski 1982; Hanski et al. 1993). Occupancy of separate patches is linked to mean population density via probabilities of immigration and extinction. A net result is that species of limited distribution also m ...
... (see later). Third, the pattern of abundance could be produced by metapopulation dynamics (Hanski 1982; Hanski et al. 1993). Occupancy of separate patches is linked to mean population density via probabilities of immigration and extinction. A net result is that species of limited distribution also m ...
Does interspecific territoriality reflect the
... However, is this inference – namely, that interspecific territoriality reflects the intensity of ecological interactions – actually correct? Factors other than the intensity of ecological interactions would affect the occurrence of interspecific territoriality. For instance, the decision by territor ...
... However, is this inference – namely, that interspecific territoriality reflects the intensity of ecological interactions – actually correct? Factors other than the intensity of ecological interactions would affect the occurrence of interspecific territoriality. For instance, the decision by territor ...
Groote Eylandt group - Anindilyakwa Land Council
... insulated against many of the threatening processes present on the Australian mainland is well recognised, and the size, environmental diversity and low level of most threatening processes on Groote Eylandt makes it outstanding in this respect. Fifty seven species recorded from this site are listed ...
... insulated against many of the threatening processes present on the Australian mainland is well recognised, and the size, environmental diversity and low level of most threatening processes on Groote Eylandt makes it outstanding in this respect. Fifty seven species recorded from this site are listed ...
Feeding strategies in sympatric red howler monkeys (Alouatta
... habitats were rarely occupied by either species, this was not likely to impact the chisquared results. The greatest overlap between all three species was in levee habitats. This was the only habitat red howlers were observed feeding in (100%). Saddleback tamarins and squirrel monkeys both occupied l ...
... habitats were rarely occupied by either species, this was not likely to impact the chisquared results. The greatest overlap between all three species was in levee habitats. This was the only habitat red howlers were observed feeding in (100%). Saddleback tamarins and squirrel monkeys both occupied l ...
The Nepal Biodiversity Strategy and Action Plan
... biodiversity conservation in the last few decades. With over 23 percent of its land area under protection, Nepal now ranks second in Asia and one of the top 20 countries in the world for the percentage of its surface area that is protected. Population of some mega wildlife species, such as tiger and ...
... biodiversity conservation in the last few decades. With over 23 percent of its land area under protection, Nepal now ranks second in Asia and one of the top 20 countries in the world for the percentage of its surface area that is protected. Population of some mega wildlife species, such as tiger and ...
The number of competitor species is unlinked to sexual dimorphism
... to the presence of guild members and closely related species (Dayan et al. 1992; Davies et al. 2007). Carnassials are readily available in natural history museums that usually keep only the skulls (and skins) of large mammals. Skull size may be an inferior index of prey-based competition in carnivor ...
... to the presence of guild members and closely related species (Dayan et al. 1992; Davies et al. 2007). Carnassials are readily available in natural history museums that usually keep only the skulls (and skins) of large mammals. Skull size may be an inferior index of prey-based competition in carnivor ...
Common Name: COOSAWATTEE CRAYFISH Scientific Name
... the Blue Ridge physiographic province. Threats: The small range of this species and the high development rates within that range are significant threats to the Coosawattee crayfish. Heavy sedimentation resulting from poor development and land management practices may cover substrates and other dayti ...
... the Blue Ridge physiographic province. Threats: The small range of this species and the high development rates within that range are significant threats to the Coosawattee crayfish. Heavy sedimentation resulting from poor development and land management practices may cover substrates and other dayti ...
Advisory Body Evaluation (IUCN)
... other species. Moreover, the loosely regulated controls on sea cucumber harvesting have led to a precipitous decline in the population which may never recover to sustainable levels. Despite all the other areas of progress, the lack of sufficient enforcement has led to a continued over-fishing which ...
... other species. Moreover, the loosely regulated controls on sea cucumber harvesting have led to a precipitous decline in the population which may never recover to sustainable levels. Despite all the other areas of progress, the lack of sufficient enforcement has led to a continued over-fishing which ...
Functional diversity and traitenvironment relationships of stream fish
... Thoms & Delong (2008) outlined the Riverine Ecosystem Synthesis, which incorporates previous work on hierarchical patch dynamics and describes river networks as arrays of hydrogeomorphic patches functional process zones (FPZ) instead of longitudinal continua as described in the RCC. Temporal variabi ...
... Thoms & Delong (2008) outlined the Riverine Ecosystem Synthesis, which incorporates previous work on hierarchical patch dynamics and describes river networks as arrays of hydrogeomorphic patches functional process zones (FPZ) instead of longitudinal continua as described in the RCC. Temporal variabi ...
Habitat selection as a major resource partitioning mechanism
... mere characters\ and infer mechanisms from patterns^ Wiens 0878#[ For instance\ a spacing in resource par! titioning has been suggested from the even apportion! ment of ultrasonic frequencies within bat assemblages including up to 01 syntopic rhinolophoids "Heller + Helversen 0878#\ but ecological e ...
... mere characters\ and infer mechanisms from patterns^ Wiens 0878#[ For instance\ a spacing in resource par! titioning has been suggested from the even apportion! ment of ultrasonic frequencies within bat assemblages including up to 01 syntopic rhinolophoids "Heller + Helversen 0878#\ but ecological e ...
Interspecific Abundance-Range Size Relationships
... size relationships, the existence of the pattern has motivated a search for a general explanation that transcends the idiosyncrasies of particular assemblages. A number of mechanisms have been proposed, embracing sampling artefacts, species attributes and population dynamics. A few explicit tests of ...
... size relationships, the existence of the pattern has motivated a search for a general explanation that transcends the idiosyncrasies of particular assemblages. A number of mechanisms have been proposed, embracing sampling artefacts, species attributes and population dynamics. A few explicit tests of ...
methods - San Francisco State University
... Parker et al. 1991). These extensive tidal marshes have now been reduced by more than 80% (95% in the Delta). Despite impacts from surrounding development, these remaining ecosystems are of critical regional importance for biodiversity, harboring a number of rare plant and animal species, including ...
... Parker et al. 1991). These extensive tidal marshes have now been reduced by more than 80% (95% in the Delta). Despite impacts from surrounding development, these remaining ecosystems are of critical regional importance for biodiversity, harboring a number of rare plant and animal species, including ...
A Five Year Species Action Framework: making a difference for
... particular levels, rather their abundance and distribution fluctuates and their genetic make-up alters naturally in response to environmental change. Healthy and resilient ecosystems (See Box 1) will maintain not only biodiversity but also the services on which human life depends. Against the backgr ...
... particular levels, rather their abundance and distribution fluctuates and their genetic make-up alters naturally in response to environmental change. Healthy and resilient ecosystems (See Box 1) will maintain not only biodiversity but also the services on which human life depends. Against the backgr ...
... Women are heading an increasing number of households due to several factors including widowhood, divorces, separation and abandonment (the causes for which are to be found in civil unrest, social and cultural factors and environmental upheavals.) Women work not to supplement income but in about 30% ...
Prey abundance and habitat use by migratory shorebirds at coastal
... form of fat and protein at food-rich staging and stopover areas (Myers et al. 1987), but there are few areas that have the right combination of resources (Morrison and Harrington 1979). In some cases, between 50% and 80% of entire migrating populations of shorebirds (i.e., all individuals of a speci ...
... form of fat and protein at food-rich staging and stopover areas (Myers et al. 1987), but there are few areas that have the right combination of resources (Morrison and Harrington 1979). In some cases, between 50% and 80% of entire migrating populations of shorebirds (i.e., all individuals of a speci ...
Social and landscape effects on food webs: a
... Network topology: the neighbourhood relationships describing what is connected to what, independently of all other kinds of information. It illustrates the structure of the network, showing how the nodes are connected with each other. Complete graph: a network where each node is linked to all other ...
... Network topology: the neighbourhood relationships describing what is connected to what, independently of all other kinds of information. It illustrates the structure of the network, showing how the nodes are connected with each other. Complete graph: a network where each node is linked to all other ...
Indexically Structured Ecological Communities Abstract. Ecological
... Ecology studies the distribution and abundance of populations across landscapes and over time. Community ecology has long operated with the assumption of “local determinism”: i.e. that ecological patterns are primarily explained by the interaction of local populations within a community. The ‘local ...
... Ecology studies the distribution and abundance of populations across landscapes and over time. Community ecology has long operated with the assumption of “local determinism”: i.e. that ecological patterns are primarily explained by the interaction of local populations within a community. The ‘local ...
Recolonizing wolves trigger a trophic cascade in Wisconsin (USA)
... that terrestrial cascades are principally species-level phenomena, due to comparatively nonlinear food-web structure, trophic complexity and effective plant defence mechanisms (Halaj & Wise 2001). However, recent evidence from experimental manipulations of herbivores and carnivores in old field ecosy ...
... that terrestrial cascades are principally species-level phenomena, due to comparatively nonlinear food-web structure, trophic complexity and effective plant defence mechanisms (Halaj & Wise 2001). However, recent evidence from experimental manipulations of herbivores and carnivores in old field ecosy ...
A trait-based approach to community assembly
... tends to occupy low SLA plots (mostly chaparral vegetation) and within those plots it has relatively low SLA values (it is an evergreen sclerophyll) (Ackerly 2004). Thus, we now have a decomposition of the species trait value into alpha and beta components (equation 4). Two other species, Ribes cali ...
... tends to occupy low SLA plots (mostly chaparral vegetation) and within those plots it has relatively low SLA values (it is an evergreen sclerophyll) (Ackerly 2004). Thus, we now have a decomposition of the species trait value into alpha and beta components (equation 4). Two other species, Ribes cali ...
CHAPTER 7: Freshwater
... Initial flooding above dams to create reservoirs can result in massive losses of terrestrial habitat; for example, India lost approximately 479,000 ha of forest land to various river valley projects from 1950-1975 (Goldsmith and Hildyard, 1984). Stagnation and low flow rates in reservoirs can lead t ...
... Initial flooding above dams to create reservoirs can result in massive losses of terrestrial habitat; for example, India lost approximately 479,000 ha of forest land to various river valley projects from 1950-1975 (Goldsmith and Hildyard, 1984). Stagnation and low flow rates in reservoirs can lead t ...
Assessing ecological specialization of an ant–seed dispersal
... Abstract. Specialization in species interactions is of central importance for understanding the ecological structure and evolution of plant–animal mutualisms. Most plant–animal mutualisms are facultative and strongly asymmetric. In particular, myrmecochory (seed dispersal by ants) has been regarded ...
... Abstract. Specialization in species interactions is of central importance for understanding the ecological structure and evolution of plant–animal mutualisms. Most plant–animal mutualisms are facultative and strongly asymmetric. In particular, myrmecochory (seed dispersal by ants) has been regarded ...
Behavioural and physiological traits to thermal stress tolerance in
... and risk-averser, foraging very far from their critical thermal limits (CTM). Subordinate are heat-tolerant (thermophilic) and risk-proner, foraging very near their CTM, running a high heat mortality risk, but having better performance at high temperatures. Thermal tolerance allows a far greater dom ...
... and risk-averser, foraging very far from their critical thermal limits (CTM). Subordinate are heat-tolerant (thermophilic) and risk-proner, foraging very near their CTM, running a high heat mortality risk, but having better performance at high temperatures. Thermal tolerance allows a far greater dom ...
Spatio-temporal community dynamics induced by frequency
... Wu and Marceau, 2002). Spatially explicit formulations of Lotka–Volterra competition models have shown that changing the scale of spatial interactions in homogeneous environments alters the region of the parameter space where coexistence at equilibrium can be achieved (Neuhauser and Pacala, 1999; Mu ...
... Wu and Marceau, 2002). Spatially explicit formulations of Lotka–Volterra competition models have shown that changing the scale of spatial interactions in homogeneous environments alters the region of the parameter space where coexistence at equilibrium can be achieved (Neuhauser and Pacala, 1999; Mu ...
Biodiversity action plan
This article is about a conservation biology topic. For other uses of BAP, see BAP (disambiguation).A biodiversity action plan (BAP) is an internationally recognized program addressing threatened species and habitats and is designed to protect and restore biological systems. The original impetus for these plans derives from the 1992 Convention on Biological Diversity (CBD). As of 2009, 191 countries have ratified the CBD, but only a fraction of these have developed substantive BAP documents.The principal elements of a BAP typically include: (a) preparing inventories of biological information for selected species or habitats; (b) assessing the conservation status of species within specified ecosystems; (c) creation of targets for conservation and restoration; and (d) establishing budgets, timelines and institutional partnerships for implementing the BAP.