The Serengeti food web: empirical quantification and analysis of
... 1. To address effects of land use and human overexploitation on wildlife populations, it is essential to better understand how human activities have changed species composition, diversity and functioning. Theoretical studies modelled how network properties change under human-induced, non-random spec ...
... 1. To address effects of land use and human overexploitation on wildlife populations, it is essential to better understand how human activities have changed species composition, diversity and functioning. Theoretical studies modelled how network properties change under human-induced, non-random spec ...
Biotic interactions and plant invasions
... from their native ranges, and gain interactions with new species, under new abiotic conditions. From a biogeographical perspective, differences in the assemblage of interacting species, as well as in abiotic conditions, may explain the demographic success of the introduced plant populations relative ...
... from their native ranges, and gain interactions with new species, under new abiotic conditions. From a biogeographical perspective, differences in the assemblage of interacting species, as well as in abiotic conditions, may explain the demographic success of the introduced plant populations relative ...
Plant Community Analysis and Dating of the Asulkan
... should be later successional. In conclusion, one would predict that from the tongue of a glacier to the terminal moraine, succession is evident. Though succession of bacterial communities inhabiting the glacial forefields has been thoroughly investigated in the past, plant communities in the forefie ...
... should be later successional. In conclusion, one would predict that from the tongue of a glacier to the terminal moraine, succession is evident. Though succession of bacterial communities inhabiting the glacial forefields has been thoroughly investigated in the past, plant communities in the forefie ...
Mainstreaming Biodiversity in Agricultural Development
... does not increase overall biodiversity. On the contrary, introducing exotic species, disturbing a habitat, or allowing natural weed species to invade may occur at the expense of native species that may be rare, threatened, or localized in their distribution (endemic). This will result in a net loss ...
... does not increase overall biodiversity. On the contrary, introducing exotic species, disturbing a habitat, or allowing natural weed species to invade may occur at the expense of native species that may be rare, threatened, or localized in their distribution (endemic). This will result in a net loss ...
3.2.1 Fragmentation metrics - Food and Agriculture Organization of
... animals and top carnivores, which are well known to require large areas of habitat, are especially vulnerable to the reduction in habitat area caused by forest fragmentation, and they may disappear entirely from forest patches because food or other resources are inadequate to support them. Smaller s ...
... animals and top carnivores, which are well known to require large areas of habitat, are especially vulnerable to the reduction in habitat area caused by forest fragmentation, and they may disappear entirely from forest patches because food or other resources are inadequate to support them. Smaller s ...
- Wiley Online Library
... access to sites with high lion use by actively avoiding those areas just in the hours immediately following lion activity. Our results suggest that cheetahs are able to use patches of preferred habitat by avoiding lions on a moment-to-moment basis. Such fine-scale temporal avoidance is likely to ...
... access to sites with high lion use by actively avoiding those areas just in the hours immediately following lion activity. Our results suggest that cheetahs are able to use patches of preferred habitat by avoiding lions on a moment-to-moment basis. Such fine-scale temporal avoidance is likely to ...
Slide 1
... – 1,000 to 2,200 Km2 area needed to sustain a non-migratory cougar population for 100 years with 98% certainty (Beier, P. 1993. Determining minimum habitat areas and habitat corridors for cougars. Conservation Biology 7: 94-108) – Immigrants may comprise up to 50% of annual recruitment in ...
... – 1,000 to 2,200 Km2 area needed to sustain a non-migratory cougar population for 100 years with 98% certainty (Beier, P. 1993. Determining minimum habitat areas and habitat corridors for cougars. Conservation Biology 7: 94-108) – Immigrants may comprise up to 50% of annual recruitment in ...
Composition, Function, and Structure of Old-Growth Douglas
... (Franklin and others 1981). They are also locales for condensation of moisture, precipitation of other atmospheric materials, and interception of snow. Large trees provide diverse habitats for a myriad of organisms, including epiphytic plants, birds, and mammals. Invertebrate communities are especia ...
... (Franklin and others 1981). They are also locales for condensation of moisture, precipitation of other atmospheric materials, and interception of snow. Large trees provide diverse habitats for a myriad of organisms, including epiphytic plants, birds, and mammals. Invertebrate communities are especia ...
state of Britain's mammals a focus on invasive species
... jingoistic nuances27, 28. Equally there are no agreed measurements of the level of impact, or its type, other than it should be ‘major’, that an incoming species must exert on a community in order to be considered invasive. Only 10% of introduced species become established, and of those only 10% bec ...
... jingoistic nuances27, 28. Equally there are no agreed measurements of the level of impact, or its type, other than it should be ‘major’, that an incoming species must exert on a community in order to be considered invasive. Only 10% of introduced species become established, and of those only 10% bec ...
Lake Manager`s Handbook: Alien Invaders
... have been introduced as ornamental garden/aquarium specimens, but also as part of a deliberate acclimatisation policy. Consequently, New Zealand is noted as having one of the highest percentages (about 50%) of introduced floras in the world (Williamson 1996). Freshwater systems in New Zealand, inclu ...
... have been introduced as ornamental garden/aquarium specimens, but also as part of a deliberate acclimatisation policy. Consequently, New Zealand is noted as having one of the highest percentages (about 50%) of introduced floras in the world (Williamson 1996). Freshwater systems in New Zealand, inclu ...
Animals, the environment and people
... Crop raiding by vertebrates is a perennial problem in Africa, Asia and South America. Crop plants, bred for palatability and limited chemical defence, are a very attractive food source for wildlife, ranging from rodents to elephantsb. The large mammals (such as primates, elephants and ungulates) dra ...
... Crop raiding by vertebrates is a perennial problem in Africa, Asia and South America. Crop plants, bred for palatability and limited chemical defence, are a very attractive food source for wildlife, ranging from rodents to elephantsb. The large mammals (such as primates, elephants and ungulates) dra ...
Two Pines Tract - Charleston County Parks
... conversion to loblolly pine for wood production. The predominate specie here is loblolly pine with scattered clumps or pockets of live oak (Quercus virginiana), cabbage palm, (Sabal palmetto), southern red cedar (Juniperus silicicola), and magnolia (Magnolia grandiflora) in the overstory and wax myr ...
... conversion to loblolly pine for wood production. The predominate specie here is loblolly pine with scattered clumps or pockets of live oak (Quercus virginiana), cabbage palm, (Sabal palmetto), southern red cedar (Juniperus silicicola), and magnolia (Magnolia grandiflora) in the overstory and wax myr ...
The influence of humidity and water availability on the survival of
... species are comparable to those of phytoseiids known to control Tetranychus spp. ( Dinh et al., 1988, this volume ). Thus, because of their distribution in dry and humid areas in South America, and because of their possible efficacy in controlling Tetranychus spp., it is worthwhile to test and compa ...
... species are comparable to those of phytoseiids known to control Tetranychus spp. ( Dinh et al., 1988, this volume ). Thus, because of their distribution in dry and humid areas in South America, and because of their possible efficacy in controlling Tetranychus spp., it is worthwhile to test and compa ...
Forest Ecology and Management Key structural forest
... and Fahrig, 2000), different types of dispersers indeed require a structural corridor or are benefited by it (King and With, 2002). In addition, the planning guidelines derived from such structural connectivity approach may also be easier to link to forest and landscape units (e.g. corridors) that ca ...
... and Fahrig, 2000), different types of dispersers indeed require a structural corridor or are benefited by it (King and With, 2002). In addition, the planning guidelines derived from such structural connectivity approach may also be easier to link to forest and landscape units (e.g. corridors) that ca ...
Microbial Community Analysis of Shallow Subsurface
... below the S04-rich layer. Haveman et al. (1998, 2000) have shown that microbes are responsible for these redox processes to occur in the groundwater at Olkiluoto. Research and identification of microorganisms has been based on cultivation of microorganisms and their identification by physiological, ...
... below the S04-rich layer. Haveman et al. (1998, 2000) have shown that microbes are responsible for these redox processes to occur in the groundwater at Olkiluoto. Research and identification of microorganisms has been based on cultivation of microorganisms and their identification by physiological, ...
Japanese knotweed Invasive Species—Best Control Practices Fallopia japonica (Polygonum cuspidatum)
... In addition, fragments of both stem and root material can sprout, giving rise to new plants or entire colonies. While fragments near the soil’s surface are most likely to sprout, sprouting has been demonstrated from fragments up to 1 m (39 in) deep. Because of this, it presents an enormous threat al ...
... In addition, fragments of both stem and root material can sprout, giving rise to new plants or entire colonies. While fragments near the soil’s surface are most likely to sprout, sprouting has been demonstrated from fragments up to 1 m (39 in) deep. Because of this, it presents an enormous threat al ...
from wsl.ch
... and its co-occurring competitors in heterogeneous environments. The IBM is a cellular automaton in which each sub-cell is characterized by unique environmental conditions (temperature and soil moisture) and can support one sessile individual. In the following, we provide a simple overview over the m ...
... and its co-occurring competitors in heterogeneous environments. The IBM is a cellular automaton in which each sub-cell is characterized by unique environmental conditions (temperature and soil moisture) and can support one sessile individual. In the following, we provide a simple overview over the m ...
Chapter 15: Reptiles - Bryophyte Ecology
... Figure 7-Figure 9) is common in ponds, lakes, marshes, and other forms of slow-moving water with a muddy bottom, it can also be found in fens and bogs (Rydin & Jeglum 2006) – habitats where bryophytes predominate. It has in interesting courtship in which the male uses his long claws, palms facing ou ...
... Figure 7-Figure 9) is common in ponds, lakes, marshes, and other forms of slow-moving water with a muddy bottom, it can also be found in fens and bogs (Rydin & Jeglum 2006) – habitats where bryophytes predominate. It has in interesting courtship in which the male uses his long claws, palms facing ou ...
Stochastic species distributions are driven by organism size
... zooplankton number and phytoplankton biomass (chlorophyll a) as biotic variables. This is because bacteria can assimilate the other planktonic organisms in the water obtaining organic material and nutrients and because other planktonic taxa provide microhabitats for bacteria (reviewed by Cole 1982). ...
... zooplankton number and phytoplankton biomass (chlorophyll a) as biotic variables. This is because bacteria can assimilate the other planktonic organisms in the water obtaining organic material and nutrients and because other planktonic taxa provide microhabitats for bacteria (reviewed by Cole 1982). ...
Western Screech-Owl kennicottii subspecies,Megascops kennicottii
... Reasons for designation: This small owl has shown serious declines in the southern part of its range in Metro Vancouver, Victoria and the Gulf Islands areas, where it has nearly disappeared over the last 10 to 15 years. Based on observed declines reported in Alaska, it has likely also declined in th ...
... Reasons for designation: This small owl has shown serious declines in the southern part of its range in Metro Vancouver, Victoria and the Gulf Islands areas, where it has nearly disappeared over the last 10 to 15 years. Based on observed declines reported in Alaska, it has likely also declined in th ...
Feeding Relationships Among Species of Notropis (Pisces
... genus Notropis (Pisces: Cyprinidae) was investigated in Roxbury Creek, a small stream in southern Wisconsin. Characteristic spatial distributions for each species were determined from frequency of catch in unbaited minnow traps set at varying heights and locations in the pools of the stream. Data fo ...
... genus Notropis (Pisces: Cyprinidae) was investigated in Roxbury Creek, a small stream in southern Wisconsin. Characteristic spatial distributions for each species were determined from frequency of catch in unbaited minnow traps set at varying heights and locations in the pools of the stream. Data fo ...
Identifying the role of soil microbes in plant invasions
... The accumulation of pathogens hypothesis involves generalist pathogens that infect not only the invader but also competing native plants (Eppinga et al. 2006). The accumulation of local generalist pathogens should result in increased or maintained dominance of the invader in the community if the loc ...
... The accumulation of pathogens hypothesis involves generalist pathogens that infect not only the invader but also competing native plants (Eppinga et al. 2006). The accumulation of local generalist pathogens should result in increased or maintained dominance of the invader in the community if the loc ...
dominant plant communities - Kennebec Estuary Land Trust
... productivity and survival in the bay may be within the range of natural variance or it may indicate that local conditions are less than ideal for SAV. Monitoring that began in the mid-20th century indicates that SAV spatial distributions in the upper Kennebec Estuary have experienced periods of expa ...
... productivity and survival in the bay may be within the range of natural variance or it may indicate that local conditions are less than ideal for SAV. Monitoring that began in the mid-20th century indicates that SAV spatial distributions in the upper Kennebec Estuary have experienced periods of expa ...
Status of marine species and habitats
... fringe. Strong currents tearing past vertical walls produce some of the greatest biological turnover of filter feeders in any system, while attracting large pelagic visitors, such as sharks and consequently tourists. The habitats reflect the unique placement of the islands on the equator and the cur ...
... fringe. Strong currents tearing past vertical walls produce some of the greatest biological turnover of filter feeders in any system, while attracting large pelagic visitors, such as sharks and consequently tourists. The habitats reflect the unique placement of the islands on the equator and the cur ...
Habitat
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A habitat is an ecological or environmental area that is inhabited by human, a particular species of animal, plant, or other type of organism.A place where a living thing lives is its habitat. It is a place where it can find food, shelter, protection and mates for reproduction. It is the natural environment in which an organism lives, or the physical environment that surrounds a species population.A habitat is made up of physical factors such as soil, moisture, range of temperature, and availability of light as well as biotic factors such as the availability of food and the presence of predators. A habitat is not necessarily a geographic area—for a parasitic organism it is the body of its host, part of the host's body such as the digestive tract, or a cell within the host's body.