![Terrestrial Arthropod Assemblages: Their Use in Conservation](http://s1.studyres.com/store/data/004813228_1-d5803b39136c988ce7a5ccde85c071ba-300x300.png)
Terrestrial Arthropod Assemblages: Their Use in Conservation
... function in response to natural factors, human disturbances, or management activities over time (Noss 1990; Spellerberg 1991). A challenge in monitoring is to separate variation in baseline conditions due to natural fluctuations fromvariation due to human disturbances. This challenge is met in part ...
... function in response to natural factors, human disturbances, or management activities over time (Noss 1990; Spellerberg 1991). A challenge in monitoring is to separate variation in baseline conditions due to natural fluctuations fromvariation due to human disturbances. This challenge is met in part ...
Trophically Unique Species Are Vulnerable to Cascading Extinction Linköping University Postprint
... Cascading Extinction in Trophically Unique Species Quince et al. 2005; Eklöf and Ebenman 2006). The trophic position of the primary extinction is also important but tends to interact with connectance. In sparsely connected communities, extinction of a top predator is less likely to cause secondary ...
... Cascading Extinction in Trophically Unique Species Quince et al. 2005; Eklöf and Ebenman 2006). The trophic position of the primary extinction is also important but tends to interact with connectance. In sparsely connected communities, extinction of a top predator is less likely to cause secondary ...
Namadgi National Park, ACT Kosciuszko National Park, NSW
... Australian Capital Territory (ACT) and Kosciuszko National Park in New South Wales (NSW). While the areas had been surveyed previously, the remoteness and roughness of the terrain meant that many of the collections were restricted to the more accessible sites. In addition, the parks had not been sur ...
... Australian Capital Territory (ACT) and Kosciuszko National Park in New South Wales (NSW). While the areas had been surveyed previously, the remoteness and roughness of the terrain meant that many of the collections were restricted to the more accessible sites. In addition, the parks had not been sur ...
Past tree range dynamics in the Iberian Peninsula
... main utility of nuclear markers is to determine geographical patterns of genetic diversity, which can to some extent be used to infer past dynamics, too (e.g. López de Heredia et al., 2005). Phylogeographical studies have described historical population and geographical range dynamics of numerous tr ...
... main utility of nuclear markers is to determine geographical patterns of genetic diversity, which can to some extent be used to infer past dynamics, too (e.g. López de Heredia et al., 2005). Phylogeographical studies have described historical population and geographical range dynamics of numerous tr ...
Phylogeographic Analyses and Paleodistribution
... higher latitudes when climate warmed up again. In contrast to Eurasia, latitudinal orientation of the major mountain ranges in the Americas made these migrations easily possible. In the huge steppe of the Patagonian plains and adjacent Andes of southern South America thrives a group of three sympatr ...
... higher latitudes when climate warmed up again. In contrast to Eurasia, latitudinal orientation of the major mountain ranges in the Americas made these migrations easily possible. In the huge steppe of the Patagonian plains and adjacent Andes of southern South America thrives a group of three sympatr ...
What enables coexistence in plant communities? Weak versus
... therefore our individual entity is a tree. The species traits we examine as trade-off attributes are seed dispersal range, tree growth rate, and mortality rate. We compare conditions for species coexistence in three models: a basic trade-off model and two models where local processes are added to th ...
... therefore our individual entity is a tree. The species traits we examine as trade-off attributes are seed dispersal range, tree growth rate, and mortality rate. We compare conditions for species coexistence in three models: a basic trade-off model and two models where local processes are added to th ...
The Landscape Ecology of Invasive Spread
... scale” ( Urban et al. 1987 ); and (3) the study of the “effect of pattern on process” (Turner 1989). The first two definitions imply that a landscape is an area of broad spatial extent that occurs at a level of organization above ecosystems and communities (but below the biome) in the traditional ec ...
... scale” ( Urban et al. 1987 ); and (3) the study of the “effect of pattern on process” (Turner 1989). The first two definitions imply that a landscape is an area of broad spatial extent that occurs at a level of organization above ecosystems and communities (but below the biome) in the traditional ec ...
SPECIES-AREA RELATIONSHIPS SPECIES-AREA REL.ATIONSHIPS
... types: white sand, limestone, and red sand. He next categorized the plant species according to the habitat types in which they occurred. There were three groups of habitat "specialists" that occurred in only one habitat, three groups of species that occurred in exactly two of the habitats, and one g ...
... types: white sand, limestone, and red sand. He next categorized the plant species according to the habitat types in which they occurred. There were three groups of habitat "specialists" that occurred in only one habitat, three groups of species that occurred in exactly two of the habitats, and one g ...
2 OBJECTIVE: Prevent the introduction of ANS into CT
... Long Island Sound’s environmental conditions can vary widely throughout the course of a year; for example, water temperatures range from 1oC in winter to 22 oC during late summer. Climate change shifts of just a degree or two can have a profound influence on the species living in the Sound, some of ...
... Long Island Sound’s environmental conditions can vary widely throughout the course of a year; for example, water temperatures range from 1oC in winter to 22 oC during late summer. Climate change shifts of just a degree or two can have a profound influence on the species living in the Sound, some of ...
Ecosystems - Learning for a Sustainable Future
... New varieties of farm plants and animals (genetically modified organisms) have been engineered by manipulating their genetic instructions to produce new characteristics.39 Biotechnology has contributed to human wellbeing in many ways, but its costs and application have led to a variety of contro ...
... New varieties of farm plants and animals (genetically modified organisms) have been engineered by manipulating their genetic instructions to produce new characteristics.39 Biotechnology has contributed to human wellbeing in many ways, but its costs and application have led to a variety of contro ...
Depth segregation phenomenon and the macrofaunal diversity associated to
... intimate correlation between temperature and depth segregation in Donax serra, where juveniles are positioned higher in the mid-tide zone. Several studies refer to the existence of intraspecific competition, mostly between larvae and adults, in which larval settlement contributes to the different de ...
... intimate correlation between temperature and depth segregation in Donax serra, where juveniles are positioned higher in the mid-tide zone. Several studies refer to the existence of intraspecific competition, mostly between larvae and adults, in which larval settlement contributes to the different de ...
Species functional redundancy, random extinctions and the stability
... 1 The level of functional redundancy in natural communities is likely to modulate how ecosystem stability is affected by local species extinction. Thus, extinction should have no effect if all species have similar functions, but a major effect if each carries different functions. 2 We provide a prob ...
... 1 The level of functional redundancy in natural communities is likely to modulate how ecosystem stability is affected by local species extinction. Thus, extinction should have no effect if all species have similar functions, but a major effect if each carries different functions. 2 We provide a prob ...
Horse Ranching Increases Biodiversity in a Foothills Parkland
... was estimated as a percentage of the 1-m2 ground surface covered by living material of that species. the results were tallied so that species in the two sections could be compared with respect to both frequency and cover. No new species were recorded after 35 quadrats in either section suggesting th ...
... was estimated as a percentage of the 1-m2 ground surface covered by living material of that species. the results were tallied so that species in the two sections could be compared with respect to both frequency and cover. No new species were recorded after 35 quadrats in either section suggesting th ...
LaPolla et al. (2010) - Department of Entomology
... and Winkler bags are employed. Ward (2000) found that Nylanderia (listed as Paratrechina) was the fifth most frequently encountered ant genus in leaf-litter samples from around the world. Several species from different genera have become economically important invasive species, with Paratrechina lon ...
... and Winkler bags are employed. Ward (2000) found that Nylanderia (listed as Paratrechina) was the fifth most frequently encountered ant genus in leaf-litter samples from around the world. Several species from different genera have become economically important invasive species, with Paratrechina lon ...
Green Crab - Virginia Beach City Public Schools
... oysters and 400 Bay oysters were placed in the York River. Since then, researchers from the Virginia Institute of Marine Sciences found that 95 percent of the native eastern oyster, Crassostrea virginica, died from the diseases MSX and Dermo. None of the Japanese oysters, Crassostrea gigas, died as ...
... oysters and 400 Bay oysters were placed in the York River. Since then, researchers from the Virginia Institute of Marine Sciences found that 95 percent of the native eastern oyster, Crassostrea virginica, died from the diseases MSX and Dermo. None of the Japanese oysters, Crassostrea gigas, died as ...
ES9
... shown that over the long-term in captivity, populations of tree snails can undergo population fluctuations, the reasons for losses are difficult to understand, therefore are challenging to control. For these reasons we are more careful perhaps than in the past about bringing in a population without ...
... shown that over the long-term in captivity, populations of tree snails can undergo population fluctuations, the reasons for losses are difficult to understand, therefore are challenging to control. For these reasons we are more careful perhaps than in the past about bringing in a population without ...
Ecological change, changing ecology
... this act. Still, cumulative effects by a series of legal decisions may have negative, and sometimes destructive, effects on biodiversity, especially so for the area-demanding species. The number of decision makers is high and their skills may often be poor, and decisions may also be overruled due to ...
... this act. Still, cumulative effects by a series of legal decisions may have negative, and sometimes destructive, effects on biodiversity, especially so for the area-demanding species. The number of decision makers is high and their skills may often be poor, and decisions may also be overruled due to ...
Preview Sample 2
... B) An extensive region of land that includes one or more areas undisturbed by humans is called a zoned reserve. C) Few, if any, ecosystems remain undisturbed by humans. D) The areas surrounding a zoned reserve are not to be used to support human populations. E) Costa Rica hopes to maintain at least ...
... B) An extensive region of land that includes one or more areas undisturbed by humans is called a zoned reserve. C) Few, if any, ecosystems remain undisturbed by humans. D) The areas surrounding a zoned reserve are not to be used to support human populations. E) Costa Rica hopes to maintain at least ...
Observations On Environmental Change in South Africa
... whereas environmental change can be experienced as a directional trend; either gradual or drastic, but with a high probability of being irreversible. ...
... whereas environmental change can be experienced as a directional trend; either gradual or drastic, but with a high probability of being irreversible. ...
jxb.oxfordjournals.org
... C3 species at low temperatures. However, a lower freezing resistance may also decrease the competitive advantage of C4 plants by reducing canopy duration, especially in continental steppe grasslands, where a short, hot growing season is bracketed by frost events. This paper reports an experimental t ...
... C3 species at low temperatures. However, a lower freezing resistance may also decrease the competitive advantage of C4 plants by reducing canopy duration, especially in continental steppe grasslands, where a short, hot growing season is bracketed by frost events. This paper reports an experimental t ...
Section 4: Population Samplings
... example cutting a forest or draining wetlands. Habitat disruption in currently the leading cause of extinction. Changes in the biological environment occur in three ways. 1. Species introduction: An exotic species is introduced into an area where it may have no predators to control its population si ...
... example cutting a forest or draining wetlands. Habitat disruption in currently the leading cause of extinction. Changes in the biological environment occur in three ways. 1. Species introduction: An exotic species is introduced into an area where it may have no predators to control its population si ...
Conservation of Native Biodiversity in the City
... with these characteristics would concentrate on permanent protection of existing habitats, and controlling adverse impacts on such habitats. For example, some predaceous arthropods are less active during the full moon (Skutelsky 1996; Tigar & Osborne 1999); chronic nocturnal illumination of remnant ...
... with these characteristics would concentrate on permanent protection of existing habitats, and controlling adverse impacts on such habitats. For example, some predaceous arthropods are less active during the full moon (Skutelsky 1996; Tigar & Osborne 1999); chronic nocturnal illumination of remnant ...
Spatial distribution and abundance of the giant tiger prawn
... and river mouths associated with mangroves, and it is frequently caught by commercial shrimp harvesters. The presence of small sizes of the giant tiger prawn in the region suggests that it may have established a self-sustaining population in the Gulf of Urabá but direct confirmation is still needed. ...
... and river mouths associated with mangroves, and it is frequently caught by commercial shrimp harvesters. The presence of small sizes of the giant tiger prawn in the region suggests that it may have established a self-sustaining population in the Gulf of Urabá but direct confirmation is still needed. ...
Figs and the Diversity of Tropical Rainforests
... large number of traits, implying that they should have similar ecologies and thus exhibit a large degree of niche overlap. The coexistence of suites of such ecologically similar species is a special problem for the diversity of tropical rainforests, because standard niche theory predicts the competi ...
... large number of traits, implying that they should have similar ecologies and thus exhibit a large degree of niche overlap. The coexistence of suites of such ecologically similar species is a special problem for the diversity of tropical rainforests, because standard niche theory predicts the competi ...
Secondary succession in overgrazed Pannonian sandy
... Thomas & Dale 1976), but only a few studies evaluate the role of microtopography on annual-perennial dynamics (e.g., Pemadasa et al. 1974). Sandy grasslands, like many other types of grassland in the Pannonian region have undergone major compositional changes during the last few decades due to chang ...
... Thomas & Dale 1976), but only a few studies evaluate the role of microtopography on annual-perennial dynamics (e.g., Pemadasa et al. 1974). Sandy grasslands, like many other types of grassland in the Pannonian region have undergone major compositional changes during the last few decades due to chang ...
Introduced species
![](https://commons.wikimedia.org/wiki/Special:FilePath/Melilotus_alba_bgiu.jpg?width=300)
An introduced, alien, exotic, non-indigenous, or non-native species, or simply an introduction, is a species living outside its native distributional range, which has arrived there by human activity, either deliberate or accidental. Non-native species can have various effects on the local ecosystem. Introduced species that become established and spread beyond the place of introduction are called invasive species. Some have a negative effect on a local ecosystem. Some introduced species may have no negative effect or only minor impact. Some species have been introduced intentionally to combat pests. They are called biocontrols and may be regarded as beneficial as an alternative to pesticides in agriculture for example. In some instances the potential for being beneficial or detrimental in the long run remains unknown. A list of some introduced species is given in a separate article.The effects of introduced species on natural environments have gained much scrutiny from scientists, governments, farmers and others.