The Distribution and Status of the Squirrel Glider, Petaurus
... a population, to cope with chance events. For example, a smaller population is less able to cope with the loss of a few individuals due to disease than a larger one. Small populations are also likely to have a relatively reduced gene pool, ...
... a population, to cope with chance events. For example, a smaller population is less able to cope with the loss of a few individuals due to disease than a larger one. Small populations are also likely to have a relatively reduced gene pool, ...
Biodiversity and teaching - Bertrand Pajot
... Determining all these contents, components , limits . Identifying the competences to implement, work and assess. Planning the partnership with scientific institutions Teaching that must be do ! ...
... Determining all these contents, components , limits . Identifying the competences to implement, work and assess. Planning the partnership with scientific institutions Teaching that must be do ! ...
Bird Conservation International, page 1 of 9 . © BirdLife International
... probably have an effect on dove survivorship (Rusk et al. 2008). Access to fresh water has also been highlighted as a possible limiting factor within the now very restricted range (Rusk et al. 2008, Rusk 2011). Moreover, the continuing low population size is likely to pose a significant long-term ri ...
... probably have an effect on dove survivorship (Rusk et al. 2008). Access to fresh water has also been highlighted as a possible limiting factor within the now very restricted range (Rusk et al. 2008, Rusk 2011). Moreover, the continuing low population size is likely to pose a significant long-term ri ...
Ecology project Name Period ______ Instructions: Part 1: What is t
... Questions: What two factors are necessary in order to identify an area as an ecosystem? How might some these factors affect your population in your ecosystem? Part 5: How do organisms obtain the essential and life-sustaining materials? All organisms need certain chemicals in order to live. Chief amo ...
... Questions: What two factors are necessary in order to identify an area as an ecosystem? How might some these factors affect your population in your ecosystem? Part 5: How do organisms obtain the essential and life-sustaining materials? All organisms need certain chemicals in order to live. Chief amo ...
Habitat use and movement patterns of the Northern
... Finally, I thank the rattlers for opening my eyes to a world of possibilities. ...
... Finally, I thank the rattlers for opening my eyes to a world of possibilities. ...
WHY LICHENS MATTER
... admit that they simply enjoy seeing the variety of forms and colors growing on the trees, rocks, and soils wherever they go. Many also know that lichens are indicators of air pollution and that both lichens and humans depend on clean air and a healthy environment. Less well known is that lichens pla ...
... admit that they simply enjoy seeing the variety of forms and colors growing on the trees, rocks, and soils wherever they go. Many also know that lichens are indicators of air pollution and that both lichens and humans depend on clean air and a healthy environment. Less well known is that lichens pla ...
Slide 1
... 3. Predict Sea otters, a keystone species, eat sea urchins, which in turn eat kelp. In the 1990s, sea otter populations off the coast of Alaska declined because orcas ate large numbers of otters. What effect did this have on the sea otters’ ecosystem? . Sumber: www.aisd.net/aisd/Portals/73/1/a/.../1 ...
... 3. Predict Sea otters, a keystone species, eat sea urchins, which in turn eat kelp. In the 1990s, sea otter populations off the coast of Alaska declined because orcas ate large numbers of otters. What effect did this have on the sea otters’ ecosystem? . Sumber: www.aisd.net/aisd/Portals/73/1/a/.../1 ...
Biodiversity in Switzerland
... Biodiversity makes it possible to produce a wide range of goods and services. In fact, ecosystems are used to produce food, medicine, construction materials, textiles and other raw materials. Biodiversity is the key to many regulating services (water cycle, soil fertility, protection from natural di ...
... Biodiversity makes it possible to produce a wide range of goods and services. In fact, ecosystems are used to produce food, medicine, construction materials, textiles and other raw materials. Biodiversity is the key to many regulating services (water cycle, soil fertility, protection from natural di ...
diversity, ecosystem function, and stability of parasitoid
... increased with increasing diversity, not simply abundance, of parasitoids. In contrast, parasitism decreased with increasing host diversity, possibly due to positive prey interactions or increased probability of selecting unpalatable species. Temporal variability in parasitism was lower in plots wit ...
... increased with increasing diversity, not simply abundance, of parasitoids. In contrast, parasitism decreased with increasing host diversity, possibly due to positive prey interactions or increased probability of selecting unpalatable species. Temporal variability in parasitism was lower in plots wit ...
hansen2011 - Montana State University
... expected because of the assumption that intraspecific density-dependent competition for the good habitat would lead to the fittest individuals occupying the source and force subdominant individuals into the sinks (Pulliam, 1988; Delibes et al., 2001a). This is highly relevant to protected areas beca ...
... expected because of the assumption that intraspecific density-dependent competition for the good habitat would lead to the fittest individuals occupying the source and force subdominant individuals into the sinks (Pulliam, 1988; Delibes et al., 2001a). This is highly relevant to protected areas beca ...
Spatial and Temporal Dimensions of Biodiversity Dynamics
... reproduction cycle. Such species are vagile opportunists, favoured in rapidly changing environments as in the early stages of succession. It follows that at first, biodiversity is immediately raised due to the increase in species number. As subsequently equitability and structural heterogeneity of t ...
... reproduction cycle. Such species are vagile opportunists, favoured in rapidly changing environments as in the early stages of succession. It follows that at first, biodiversity is immediately raised due to the increase in species number. As subsequently equitability and structural heterogeneity of t ...
Foraging Habitat of Sepia officinalis at STARESO Research Station
... we did not get the results we were predicting. The first issue comes from our sample size and the comparison of the habitat data to the data on Sepia. Essentially we were trying to compare around 900 habitat quadrats to 14 quadrats for Sepia officinalis. Ideally we would have had more samples for Se ...
... we did not get the results we were predicting. The first issue comes from our sample size and the comparison of the habitat data to the data on Sepia. Essentially we were trying to compare around 900 habitat quadrats to 14 quadrats for Sepia officinalis. Ideally we would have had more samples for Se ...
Species Profile - Atlantic States Marine Fisheries Commission
... fishing for shad, shad bakes or “planking,” along with a variety of other activities including running events, arts and crafts shows, music, and many other activities to foster community relations, attract tourists, and benefit the local economy. A listing of shad and river herring festivals can be ...
... fishing for shad, shad bakes or “planking,” along with a variety of other activities including running events, arts and crafts shows, music, and many other activities to foster community relations, attract tourists, and benefit the local economy. A listing of shad and river herring festivals can be ...
Lesson Plan 2: Current Status and Distribution of Bull
... University of Montana, report a minimum of 1,000 adult Bull Trout (approximately 500 redds) each year are necessary to ensure viability indefinitely. Approximately 500 adults or 250 redds can maintain genetic variability over the short term (no more than 100 years). A viable population of Bull Trout ...
... University of Montana, report a minimum of 1,000 adult Bull Trout (approximately 500 redds) each year are necessary to ensure viability indefinitely. Approximately 500 adults or 250 redds can maintain genetic variability over the short term (no more than 100 years). A viable population of Bull Trout ...
Carpet Python-(Morelia spilota metcalfei) accessible
... considered to be ‘endangered’ within Victoria (DSE ...
... considered to be ‘endangered’ within Victoria (DSE ...
MODELING CARNIVORE HABITAT IN THE ROCKY MOUNTAIN
... extirpation of the grizzly from most of the western U.S. is a legacy of predator control programs rather than a necessary consequence of present human population density and land use (McLellan 1990). Brown bear populations coexist with much higher levels of human density in Eastern Europe, Italy, an ...
... extirpation of the grizzly from most of the western U.S. is a legacy of predator control programs rather than a necessary consequence of present human population density and land use (McLellan 1990). Brown bear populations coexist with much higher levels of human density in Eastern Europe, Italy, an ...
How Habitat Edges Change Species Interactions
... gradient-like transitions can also be ecologically important edges (Fig. 1). At larger scales, broad ecotones featuring habitats intermediate to, yet distinct from, surrounding regions can function as edges. But not all species perceive edges visually the way humans do. Edge-like changes in soil che ...
... gradient-like transitions can also be ecologically important edges (Fig. 1). At larger scales, broad ecotones featuring habitats intermediate to, yet distinct from, surrounding regions can function as edges. But not all species perceive edges visually the way humans do. Edge-like changes in soil che ...
Short seeddispersal distances and low seedling recruitment in
... 1. In Central Europe, many plant populations are patchily distributed in human-modified landscapes and depend on animal vectors for seed dispersal. To predict seed-dispersal distances and locations of seeds of wild cherry trees (Prunus avium L.) in forest and farmland habitats in a human-modified land ...
... 1. In Central Europe, many plant populations are patchily distributed in human-modified landscapes and depend on animal vectors for seed dispersal. To predict seed-dispersal distances and locations of seeds of wild cherry trees (Prunus avium L.) in forest and farmland habitats in a human-modified land ...
appendix w5 - Department of Water Affairs
... Marginal/Low rating=1; The floodplain falls within a Municipal nature reserve or some other category of protected status that reflects its importance for the conservation of ecological diversity a local scale. Very low rating=0; The floodplain does not fall within any category of protected status th ...
... Marginal/Low rating=1; The floodplain falls within a Municipal nature reserve or some other category of protected status that reflects its importance for the conservation of ecological diversity a local scale. Very low rating=0; The floodplain does not fall within any category of protected status th ...
L-276 Edge and Other Wildlife Concepts
... stage or vegetation type. Therefore, an edge must be associated with their specific habitat requirements. It is important to note that this does not say or even imply that any of these species have specific needs for edge as a habitat requirement. In these cases, edge is simply an artifact of their ...
... stage or vegetation type. Therefore, an edge must be associated with their specific habitat requirements. It is important to note that this does not say or even imply that any of these species have specific needs for edge as a habitat requirement. In these cases, edge is simply an artifact of their ...
Article
... habitats, which can have contrasting effects [12]: the structure can significantly lower predation risk when it serves as a refuge for prey [13] but can also increase susceptibility to predators that use structure for ambush or camouflage [14,15]. The scenario is even more complicated by the evidenc ...
... habitats, which can have contrasting effects [12]: the structure can significantly lower predation risk when it serves as a refuge for prey [13] but can also increase susceptibility to predators that use structure for ambush or camouflage [14,15]. The scenario is even more complicated by the evidenc ...
Title Spatial Niche Facilitates Clonal Reproduction in Seed Plants
... (called ramets) of various ages are clustered and live together (this unit is called a genet) in the same space for a long time in a population. It is therefore natural that they experience not only various environmental changes and/or attacks by herbivores and pathogens [23–25] but also demographic ...
... (called ramets) of various ages are clustered and live together (this unit is called a genet) in the same space for a long time in a population. It is therefore natural that they experience not only various environmental changes and/or attacks by herbivores and pathogens [23–25] but also demographic ...
hierarchical analysis of forest bird species
... the effects of environmental factors at multiple levels on species distribution and abundance. Hierarchical methods that explicitly separate the independent and confounded influences of environmental variation across several levels of organization are powerful tools for this task. Our study used a h ...
... the effects of environmental factors at multiple levels on species distribution and abundance. Hierarchical methods that explicitly separate the independent and confounded influences of environmental variation across several levels of organization are powerful tools for this task. Our study used a h ...
Fish Habitat Management for PA Impoundments
... reservoirs are designed, constructed and maintained by people, the only “natural” parts of their environment are the fish and the aquatic vegetation that propagate there. Physical objects found in the impoundment are either “native” (there originally) or “artificial” (constructed) habitats. Since an ...
... reservoirs are designed, constructed and maintained by people, the only “natural” parts of their environment are the fish and the aquatic vegetation that propagate there. Physical objects found in the impoundment are either “native” (there originally) or “artificial” (constructed) habitats. Since an ...
Connectivity at the Land-Water Interface
... communities (Polis et al. 1997a). Linkages can also be demographic (e.g., sourcesink dynamics, metapopulations), physical (e.g., sedimentation), trophic (“spatial subsidies”—food resources arriving from other habitats), or informational (behavioral). This large diversity creates the need for an orga ...
... communities (Polis et al. 1997a). Linkages can also be demographic (e.g., sourcesink dynamics, metapopulations), physical (e.g., sedimentation), trophic (“spatial subsidies”—food resources arriving from other habitats), or informational (behavioral). This large diversity creates the need for an orga ...
Habitat destruction
Habitat destruction is the process in which natural habitat is rendered functionally unable to support the species present. In this process, the organisms that previously used the site are displaced or destroyed, reducing biodiversity. Habitat destruction by human activity is mainly for the purpose of harvesting natural resources for industry production and urbanization. Clearing habitats for agriculture is the principal cause of habitat destruction. Other important causes of habitat destruction include mining, logging, trawling and urban sprawl. Habitat destruction is currently ranked as the primary cause of species extinction worldwide. It is a process of natural environmental change that may be caused by habitat fragmentation, geological processes, climate change or by human activities such as the introduction of invasive species, ecosystem nutrient depletion, and other human activities mentioned below.The terms habitat loss and habitat reduction are also used in a wider sense, including loss of habitat from other factors, such as water and noise pollution.