Impact of argentine ants (Linepithema humile, Mayr) on saproxylic
... The collection and removal of deadwood, for domestic fuel or for aesthetic reasons (by park managers) are major threats to saproxylic communities. Although these practices do not take place in the Cape Peninsula, past and current human activities have produced a mosaic of disturbed habitats embedded ...
... The collection and removal of deadwood, for domestic fuel or for aesthetic reasons (by park managers) are major threats to saproxylic communities. Although these practices do not take place in the Cape Peninsula, past and current human activities have produced a mosaic of disturbed habitats embedded ...
Plant Species Diversity and Management of Temperate Forage and
... Plant Diversity and Ecosystem Function Greater plant diversity in grassland plant communities has been linked to increased primary production (Naeem et al., 1994; Tilman et al., 1996; Hector et al., 1999), greater stability in response to disturbance (McNaughton, 1977; Frank and McNaughton, 1991; Ti ...
... Plant Diversity and Ecosystem Function Greater plant diversity in grassland plant communities has been linked to increased primary production (Naeem et al., 1994; Tilman et al., 1996; Hector et al., 1999), greater stability in response to disturbance (McNaughton, 1977; Frank and McNaughton, 1991; Ti ...
Community assembly, coexistence and the environmental filtering
... abiotic conditions. The problem is that many studies fail to separate environmental filtering from biotic processes and that the term ‘environmental filtering’ is often used as a generic term to describe any perceived abiotic influence on community structure, which is imprecise and potentially misle ...
... abiotic conditions. The problem is that many studies fail to separate environmental filtering from biotic processes and that the term ‘environmental filtering’ is often used as a generic term to describe any perceived abiotic influence on community structure, which is imprecise and potentially misle ...
Ecosystems at Risk
... An ecosystem is defined as a biological community of interacting organisms and their physical environment. ...
... An ecosystem is defined as a biological community of interacting organisms and their physical environment. ...
Community 1 A
... • Early-arriving species and later-arriving species may be linked in one of three processes: – Early arrivals may facilitate appearance of later species by making the environment favorable – They may inhibit establishment of later species – They may tolerate later species but have no impact on thei ...
... • Early-arriving species and later-arriving species may be linked in one of three processes: – Early arrivals may facilitate appearance of later species by making the environment favorable – They may inhibit establishment of later species – They may tolerate later species but have no impact on thei ...
Plant Succession: Life History and Competition
... to succeed under different conditions. For example, resistance to stress (e.g., low levels of light, water, and/or nutrients) may be achieved through either avoidance or tolerance (Levitt 1972; Chabot and Bunce 1979; Turner 1986). Each strategy has its costs in terms of physiological and morphologic ...
... to succeed under different conditions. For example, resistance to stress (e.g., low levels of light, water, and/or nutrients) may be achieved through either avoidance or tolerance (Levitt 1972; Chabot and Bunce 1979; Turner 1986). Each strategy has its costs in terms of physiological and morphologic ...
INTRODUCTION Definition and meaning, guiding principles
... Over exploitation and utilization leads to threats of habitat destruction and species extinction. Tropical forests have 50% of the world-estimated biodiversity. Yet we know little of the structure and functioning of such systems. It was only in 1972 that the Tasaday tribe in the Philippines was dis ...
... Over exploitation and utilization leads to threats of habitat destruction and species extinction. Tropical forests have 50% of the world-estimated biodiversity. Yet we know little of the structure and functioning of such systems. It was only in 1972 that the Tasaday tribe in the Philippines was dis ...
Relative importance of endogenous and exogenous mechanisms in
... with a Bright-Line hemacytometer. For species with densities > 100 000 cells·mL–1, we counted only the middle quadrat, with a volume of 0.1 μL. Otherwise, we counted the number of cells in the entire counting chamber, with a volume of 0.9 μL. The counting procedure was replicated 6 times for each sa ...
... with a Bright-Line hemacytometer. For species with densities > 100 000 cells·mL–1, we counted only the middle quadrat, with a volume of 0.1 μL. Otherwise, we counted the number of cells in the entire counting chamber, with a volume of 0.9 μL. The counting procedure was replicated 6 times for each sa ...
File - The Eurasian Ruffe
... Ruffe responds to biological changes faster than other fish species. The quick reproductive cycle allow the Ruffe to produce more offspring, giving the entire species a better chance that a gene within one fish’s DNA is resistant to things such as increased temperatures from climate change. As the ...
... Ruffe responds to biological changes faster than other fish species. The quick reproductive cycle allow the Ruffe to produce more offspring, giving the entire species a better chance that a gene within one fish’s DNA is resistant to things such as increased temperatures from climate change. As the ...
Species Accounts - Contra Costa County
... with grass or grass and scattered brush, and seldom occur in areas with thick brush. Preferred sites are relatively flat, well-drained terrain (Williams et al. 1998, Roderick and Mathews 1999). They are seldom found in areas with shallow soils due to high water tables (McCue et al. 1981) or impenetr ...
... with grass or grass and scattered brush, and seldom occur in areas with thick brush. Preferred sites are relatively flat, well-drained terrain (Williams et al. 1998, Roderick and Mathews 1999). They are seldom found in areas with shallow soils due to high water tables (McCue et al. 1981) or impenetr ...
Queensland`s Threatened Plants - WWF
... species of plants, Queensland has 8,328 species. Many of these are endemic; they occur nowhere else in the world. Several of Australia’s important centres of endemism, including World Heritage sites and biodiversity hotspots are also found in Queensland. The importance of plants cannot be overstated ...
... species of plants, Queensland has 8,328 species. Many of these are endemic; they occur nowhere else in the world. Several of Australia’s important centres of endemism, including World Heritage sites and biodiversity hotspots are also found in Queensland. The importance of plants cannot be overstated ...
Full text in pdf format
... individuals that use inshore coastal habitats as temporary juvenile habitats. These habitats vary greatly in their architecture, and different characteristics of structure could play a role in their selection and utilization by resident fauna. To solely investigate the role of structural complexity ...
... individuals that use inshore coastal habitats as temporary juvenile habitats. These habitats vary greatly in their architecture, and different characteristics of structure could play a role in their selection and utilization by resident fauna. To solely investigate the role of structural complexity ...
10b: langstone and chichester harbours
... embankment of mudflats, was at Farlington (reclaimed late 18th C), Southmoor and the east side of Hayling. They were often areas of common grazing marsh. These are outside the character area but would naturally have fallen within the boundary before reclamation. Upper saltmarsh by its geographic inf ...
... embankment of mudflats, was at Farlington (reclaimed late 18th C), Southmoor and the east side of Hayling. They were often areas of common grazing marsh. These are outside the character area but would naturally have fallen within the boundary before reclamation. Upper saltmarsh by its geographic inf ...
Brachyura (Decapoda, Crustacea) of phytobenthic
... Gee & Warwick 1994; Isaksson & Pihl 1992). The complexity of these habitats can be related, in part, to characteristics of the dominant macroalgae, such as their structure, chemical composition and surface characteristics. It can also be related to the quantity of epibionts and sediments retained by ...
... Gee & Warwick 1994; Isaksson & Pihl 1992). The complexity of these habitats can be related, in part, to characteristics of the dominant macroalgae, such as their structure, chemical composition and surface characteristics. It can also be related to the quantity of epibionts and sediments retained by ...
Bosque Background
... Riparian forests of the Middle Rio Grande Valley are typically composed of Rio Grande cottonwoods (Populus deltoides subsp. wislizenii), a subspecies of the plains (prairie) cottonwood (Populus deltoides). There has been some confusion in the scientific literature as to the specific identity of Rio ...
... Riparian forests of the Middle Rio Grande Valley are typically composed of Rio Grande cottonwoods (Populus deltoides subsp. wislizenii), a subspecies of the plains (prairie) cottonwood (Populus deltoides). There has been some confusion in the scientific literature as to the specific identity of Rio ...
Impacts of Pollutants on Beavers and Otters with Implications for
... in the re-expansion of beavers on both continents. Beavers have been used to restore wetlands, improve stream dynamics, and reduce flooding (Müller-Schwarze 2011; Gibson and Olden 2014). The most recent estimate on the population size of the North American beaver is 6-12 million (Naiman et al. 1988) ...
... in the re-expansion of beavers on both continents. Beavers have been used to restore wetlands, improve stream dynamics, and reduce flooding (Müller-Schwarze 2011; Gibson and Olden 2014). The most recent estimate on the population size of the North American beaver is 6-12 million (Naiman et al. 1988) ...
diel and seasonal variation in species composition and abundance
... differences in abundance of individual species are important and must be considered. Therefore, the difference between paired monthly night and day mean abundance was calculated for all principal species at both sites. A positive difference indicates that the night mean was higher than the day mean ...
... differences in abundance of individual species are important and must be considered. Therefore, the difference between paired monthly night and day mean abundance was calculated for all principal species at both sites. A positive difference indicates that the night mean was higher than the day mean ...
The Pond Pack
... section on life process and living things (Sc2). It can also be used as a stimulus for art, English or maths activities. How to Pond dip for self led groups The Ecology Centre will provide all the equipment needed. This will consist of white trays (one per pair), magnifiers (one per pair), nets, ide ...
... section on life process and living things (Sc2). It can also be used as a stimulus for art, English or maths activities. How to Pond dip for self led groups The Ecology Centre will provide all the equipment needed. This will consist of white trays (one per pair), magnifiers (one per pair), nets, ide ...
Cerrado`s areas as a reference analysis for aquatic conserva
... occur in permanently water saturated soils. It has a dense ground-line vegetal layer formed by swamp herbaceous species that live in puddles, such as grasses, Cyperaceae and Pteridophyta. In the other strata of the vereda, there is a strip of buritis, prominent palms that occasionally can reach more ...
... occur in permanently water saturated soils. It has a dense ground-line vegetal layer formed by swamp herbaceous species that live in puddles, such as grasses, Cyperaceae and Pteridophyta. In the other strata of the vereda, there is a strip of buritis, prominent palms that occasionally can reach more ...
CO 2
... • The explosive growth of the human population and of technology continues today • Although the populations of developing nations are growing the fastest, it is the resource consumption of the less populous, developed nations that puts a greater strain on the biosphere ...
... • The explosive growth of the human population and of technology continues today • Although the populations of developing nations are growing the fastest, it is the resource consumption of the less populous, developed nations that puts a greater strain on the biosphere ...
Disturbance, Diversity, and Invasion: Implications for
... changes in the system. In our discussion below, w e will include both direct disturbances (those affecting the survivorship of individuals directly) and indirect disturbance (those affecting resource levels or other conditions that then influence individuals in the patch). Disturbances to plant c o ...
... changes in the system. In our discussion below, w e will include both direct disturbances (those affecting the survivorship of individuals directly) and indirect disturbance (those affecting resource levels or other conditions that then influence individuals in the patch). Disturbances to plant c o ...
Phylogenetic and functional characteristics of household yard floras
... the spontaneous species pool. Yards are novel ecosystems where community assembly is driven by both natural and anthropogenic processes. Phylogenetic diversity and functional traits are increasingly recognized as critical to understanding processes of community assembly. Recent evidence indicates th ...
... the spontaneous species pool. Yards are novel ecosystems where community assembly is driven by both natural and anthropogenic processes. Phylogenetic diversity and functional traits are increasingly recognized as critical to understanding processes of community assembly. Recent evidence indicates th ...
Biodiversity effects on productivity and stability of marine macroalgal
... On the other hand, facilitation or partitioning of resources among species might be more common where resources are limited (Brooker and Callaghan 1998, Hooper et al. 2005), increasing complementarity effects. Studies that have crossed resource supply with species richness have so far provided spars ...
... On the other hand, facilitation or partitioning of resources among species might be more common where resources are limited (Brooker and Callaghan 1998, Hooper et al. 2005), increasing complementarity effects. Studies that have crossed resource supply with species richness have so far provided spars ...
Appendix 3-5 Shiels Army annual report June 2007
... In order to estimate R. rattus home-range and habitat use at KHI, a subset of the captured rats were fitted with radio collars. Each radio collar was <4% of the animal’s body weight (mean ± SE collar mass: 3.86 ± 0.10 g). Radio telemetry provides a coarse-scale estimate of habitat use. Nighttime ra ...
... In order to estimate R. rattus home-range and habitat use at KHI, a subset of the captured rats were fitted with radio collars. Each radio collar was <4% of the animal’s body weight (mean ± SE collar mass: 3.86 ± 0.10 g). Radio telemetry provides a coarse-scale estimate of habitat use. Nighttime ra ...
Environmental Science Exam Study Guide
... Describe the major sources of ocean pollution, and explain the effects of pollution on ecosystems. Describe the major laws designed to improve water quality in the U.S. Explain the greenhouse effect. Identify the factors that determine climate. Explain how chlorofluorocarbons damage the ozone layer. ...
... Describe the major sources of ocean pollution, and explain the effects of pollution on ecosystems. Describe the major laws designed to improve water quality in the U.S. Explain the greenhouse effect. Identify the factors that determine climate. Explain how chlorofluorocarbons damage the ozone layer. ...
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.