The Red Queen and the Court Jester
... explanations (22): (i) the time and area hypothesis, that the tropical belt is older and larger than temperate and polar zones, and so tropical clades have had longer to speciate, or (ii) the diversification rate hypothesis, that there are higher rates of speciation and lower rates of extinction in ...
... explanations (22): (i) the time and area hypothesis, that the tropical belt is older and larger than temperate and polar zones, and so tropical clades have had longer to speciate, or (ii) the diversification rate hypothesis, that there are higher rates of speciation and lower rates of extinction in ...
Insect Herbivory in Tropical Forests
... A second reason offered for high insect abundance and diversity in the tropics is the structural hypothcsis (Dajoz 2000). This hypothesis states that large leaf-surface area and narrow niches promote high levels of specialization among insects, especially among phytophagous species. The breadth of n ...
... A second reason offered for high insect abundance and diversity in the tropics is the structural hypothcsis (Dajoz 2000). This hypothesis states that large leaf-surface area and narrow niches promote high levels of specialization among insects, especially among phytophagous species. The breadth of n ...
Succession in Natural Communities
... was an example of primary succession allowing facultative growth. It was also important because it showed the facilitative growth during primary succession due to a disturbance. The study was perfect evidence of a community that seemed to be a climax community, but was still going through succession ...
... was an example of primary succession allowing facultative growth. It was also important because it showed the facilitative growth during primary succession due to a disturbance. The study was perfect evidence of a community that seemed to be a climax community, but was still going through succession ...
Succession in Natural Communities
... was an example of primary succession allowing facultative growth. It was also important because it showed the facilitative growth during primary succession due to a disturbance. The study was perfect evidence of a community that seemed to be a climax community, but was still going through succession ...
... was an example of primary succession allowing facultative growth. It was also important because it showed the facilitative growth during primary succession due to a disturbance. The study was perfect evidence of a community that seemed to be a climax community, but was still going through succession ...
species protection: economic issues, myths and facts
... consequences of species protection, including its impacts on economic growth and employment. The paper also discusses some of the widely-repeated anecdotes that permeate the species protection debate. Species vs. jobs or jobs vs. jobs? Discussions of species protection are often overshadowed by fear ...
... consequences of species protection, including its impacts on economic growth and employment. The paper also discusses some of the widely-repeated anecdotes that permeate the species protection debate. Species vs. jobs or jobs vs. jobs? Discussions of species protection are often overshadowed by fear ...
science and natural history
... Oak and others (1988) interpreted the habitat impacts of oak decline to include both detrimental and beneficial changes, depending on the wildlife species of interest. Structural changes included creation of small to large canopy openings, reduced canopy density, short-term stimulation of understory ...
... Oak and others (1988) interpreted the habitat impacts of oak decline to include both detrimental and beneficial changes, depending on the wildlife species of interest. Structural changes included creation of small to large canopy openings, reduced canopy density, short-term stimulation of understory ...
DOC - World bank documents
... 1. Key development issues and rationale for Bank involvement Mexico is the most biodiverse country in LAC, and, worldwide, ranks second in reptile diversity third in mammal diversity, fifth in both amphibian and plant diversity (for which it exceeds the United States and Canada combined), eighth in ...
... 1. Key development issues and rationale for Bank involvement Mexico is the most biodiverse country in LAC, and, worldwide, ranks second in reptile diversity third in mammal diversity, fifth in both amphibian and plant diversity (for which it exceeds the United States and Canada combined), eighth in ...
Restoration-Focused Germination and Development
... In Mexico, oaks (Quercus spp.) are widely distributed in temperate forests, forming pure stands or associations with conifers or other species (Challenger, 1998; Valencia-Avalos, 2004). Oak forests occupy 9 × 106 ha of Mexican land and are located mainly in the mountainous regions of the country (Ch ...
... In Mexico, oaks (Quercus spp.) are widely distributed in temperate forests, forming pure stands or associations with conifers or other species (Challenger, 1998; Valencia-Avalos, 2004). Oak forests occupy 9 × 106 ha of Mexican land and are located mainly in the mountainous regions of the country (Ch ...
Wildlife Habitat Improvements in Wetlands
... habitat that similar type wetlands having an undisturbed plant community would provide. These wetlands would typically have a vegetative diversity rating of “low” as measured by the Minnesota Routine Assessment Method For Evaluating Wetland Functions (MnRAM) (Minnesota Interagency Wetlands Group, 19 ...
... habitat that similar type wetlands having an undisturbed plant community would provide. These wetlands would typically have a vegetative diversity rating of “low” as measured by the Minnesota Routine Assessment Method For Evaluating Wetland Functions (MnRAM) (Minnesota Interagency Wetlands Group, 19 ...
Ecology (without Biomes)
... individuals living in a certain area, this is called the population density. • There are two limiting factors (biotic and abiotic) that can affect the pop. ...
... individuals living in a certain area, this is called the population density. • There are two limiting factors (biotic and abiotic) that can affect the pop. ...
unit 5: the interdependence of organisms
... Relevant Virginia Standards of Learning (SOL) BIO.8 The student will investigate and understand how populations change through time. Key concepts include * examining evidence found in fossil records; * investigating how variation of traits, reproductive strategies, and environmental pressures impac ...
... Relevant Virginia Standards of Learning (SOL) BIO.8 The student will investigate and understand how populations change through time. Key concepts include * examining evidence found in fossil records; * investigating how variation of traits, reproductive strategies, and environmental pressures impac ...
Jan 08 - Rufford Small Grants
... Our preliminary data suggest that pumas and camelids interact strongly. A high percentage of vicuña carcasses (73%, n = 59) showed signs of puma predation suggesting that pumas account for most of vicuña mortality. Results from marked vicuña newborns, monitored from birth to death or 12 months of a ...
... Our preliminary data suggest that pumas and camelids interact strongly. A high percentage of vicuña carcasses (73%, n = 59) showed signs of puma predation suggesting that pumas account for most of vicuña mortality. Results from marked vicuña newborns, monitored from birth to death or 12 months of a ...
Effects of Climatic Variability and Change on
... affect populations that use lower elevations that are more susceptible to change. The loss or reduction in the larger anadromous form will mean fewer eggs which may affect the overall population in each Major Population Group. This species has a large adaptive capacity with a range of life histories ...
... affect populations that use lower elevations that are more susceptible to change. The loss or reduction in the larger anadromous form will mean fewer eggs which may affect the overall population in each Major Population Group. This species has a large adaptive capacity with a range of life histories ...
Tree Regeneration in Response to Prescribed Fire, Thinning, and
... •Most species fit along a gradient from high soil moisture and low light, to dry and open sites. •Thinning treatments resulted in well defined changes in solar radiation, but soil moisture did not display well defined patterns based on treatment combinations. •Considerable variability exists in soil ...
... •Most species fit along a gradient from high soil moisture and low light, to dry and open sites. •Thinning treatments resulted in well defined changes in solar radiation, but soil moisture did not display well defined patterns based on treatment combinations. •Considerable variability exists in soil ...
Page 1 of 8 The Effectiveness of Threatened Species and Ecological
... small populations can be low due to emerging plants being eaten before they can be caged to aid establishment. Another threat not always well addressed is the isolation and small size of extant populations for many threatened plant species. In heavily cleared, fragmented agricultural regions the sur ...
... small populations can be low due to emerging plants being eaten before they can be caged to aid establishment. Another threat not always well addressed is the isolation and small size of extant populations for many threatened plant species. In heavily cleared, fragmented agricultural regions the sur ...
Baraboo Hills Border Lakes
... Known as the "Wisconsin Desert," Spring Green is a place where forest meets bluff, and bluff levels off into plains and dunes. The area is home to a number of plant and animal species that are uncommon to Wisconsin and more common to western deserts, such as prickly pear cacti, blue racer snakes, si ...
... Known as the "Wisconsin Desert," Spring Green is a place where forest meets bluff, and bluff levels off into plains and dunes. The area is home to a number of plant and animal species that are uncommon to Wisconsin and more common to western deserts, such as prickly pear cacti, blue racer snakes, si ...
Fauna Technical Note No. 18 Threatened frogs 1
... the habitat structure provided by some exotic plant species reduces the habitat quality for frogs. Blackberry, gorse and pasture should not be included when assessing vegetation in and around the waterbody. The presence of vegetation in the waterbody is more important for identifying significant fro ...
... the habitat structure provided by some exotic plant species reduces the habitat quality for frogs. Blackberry, gorse and pasture should not be included when assessing vegetation in and around the waterbody. The presence of vegetation in the waterbody is more important for identifying significant fro ...
ESS Topic 2.6 - Changes
... Succession - change in a community over time resulting in a stable climax community with complex interactions Primary succession - also known as a prisere; succession that develops from bare rock. Primary succession is rare because almost all of Earth's surface has already undergone several stages o ...
... Succession - change in a community over time resulting in a stable climax community with complex interactions Primary succession - also known as a prisere; succession that develops from bare rock. Primary succession is rare because almost all of Earth's surface has already undergone several stages o ...
Securing the future for ASiA`S Stunning KArSt ecoSyStemS
... emits a high-pitched squeak when disturbed. Some western Indonesian species, living on the foliage of trees, construct nests hanging from a branch by folding together two leaves. One group of species in the Pacific lays one egg at a time and bestows great parental care on the young. Plus, their ecol ...
... emits a high-pitched squeak when disturbed. Some western Indonesian species, living on the foliage of trees, construct nests hanging from a branch by folding together two leaves. One group of species in the Pacific lays one egg at a time and bestows great parental care on the young. Plus, their ecol ...
Indirect Effects in - Department of Knowledge Technologies
... competitive abilities via deterring grazers by production of toxic compounds (as a result, some plants might have coevolved together with their endophytes) ...
... competitive abilities via deterring grazers by production of toxic compounds (as a result, some plants might have coevolved together with their endophytes) ...
Ecology
... biotic factors. Distinguish between the underlined terms. 38. From an ecosystem that you have investigated give an example of an abiotic factor that influences the distribution of a named plant in the ecosystem. 39. In the case of a named ecosystem give an example of a biotic factor that influences ...
... biotic factors. Distinguish between the underlined terms. 38. From an ecosystem that you have investigated give an example of an abiotic factor that influences the distribution of a named plant in the ecosystem. 39. In the case of a named ecosystem give an example of a biotic factor that influences ...
Ecology Questions
... biotic factors. Distinguish between the underlined terms. 38. From an ecosystem that you have investigated give an example of an abiotic factor that influences the distribution of a named plant in the ecosystem. 39. In the case of a named ecosystem give an example of a biotic factor that influences ...
... biotic factors. Distinguish between the underlined terms. 38. From an ecosystem that you have investigated give an example of an abiotic factor that influences the distribution of a named plant in the ecosystem. 39. In the case of a named ecosystem give an example of a biotic factor that influences ...
Structure of a global and seasonal carbon exchange model for the
... A full understanding of the importance of terrestrial biota within the global C cycle has not been achieved, yet. Positive and negative feedbacks must be taken into consideration with respect to the vegetation / climate interaction (Kohlmaier et al, 1991). The stimulation of ecosystem production and ...
... A full understanding of the importance of terrestrial biota within the global C cycle has not been achieved, yet. Positive and negative feedbacks must be taken into consideration with respect to the vegetation / climate interaction (Kohlmaier et al, 1991). The stimulation of ecosystem production and ...
Ecological Succession
... Secondary Succession • Organisms are destroyed but the soil is safe. • The soil already contains the seeds of weeds, grasses, and trees as well as nutrients. More seeds are carried to the area by wind and birds. • Succession begins again but the primary species are different. • Because soil is pres ...
... Secondary Succession • Organisms are destroyed but the soil is safe. • The soil already contains the seeds of weeds, grasses, and trees as well as nutrients. More seeds are carried to the area by wind and birds. • Succession begins again but the primary species are different. • Because soil is pres ...
Biological Dynamics of Forest Fragments Project
The Biological Dynamics of Forest Fragments Project, originally called the Minimum Critical Size of Ecosystems Project is a large-scale ecological experiment looking at the effects of habitat fragmentation on tropical rainforest; it is one of the most expensive biology experiments ever run. The experiment, which was established in 1979 is located near Manaus, in the Brazilian Amazon. The project is jointly managed by the Smithsonian Institution and INPA, the Brazilian Institute for Research in the Amazon.The project was initiated in 1979 by Thomas Lovejoy to investigate the SLOSS debate. Initially named the Minimum Critical Size of Ecosystems Project, the project created forest fragments of sizes 1 hectare (2 acres), 10 hectares (25 acres), and 100 hectares (247 acres). Data were collected prior to the creation of the fragments and studies of the effects of fragmentation now exceed 25 years.As of October 2010 562 publications and 143 graduate dissertations and theses had emerged from the project.