Ecological consequences of hydropower development
... Small dams for hydropower have caused widespread alteration of Central American rivers, yet much of recent development has gone undocumented by scientists and conservationists. We examined the ecological effects of a small hydropower plant (Doña Julia Hydroelectric Center) on two low-order streams ...
... Small dams for hydropower have caused widespread alteration of Central American rivers, yet much of recent development has gone undocumented by scientists and conservationists. We examined the ecological effects of a small hydropower plant (Doña Julia Hydroelectric Center) on two low-order streams ...
Final report Fishing Impact on Benthic Communities
... the two species were analysed from a treatment wayline before and after it was fished with a 4 m commercial beam trawl and from 2 adjacent unfished control waylines. Catch numbers of P. bernhardus were significantly higher on the treatment wayline two and three days after fishing, whilst on the four ...
... the two species were analysed from a treatment wayline before and after it was fished with a 4 m commercial beam trawl and from 2 adjacent unfished control waylines. Catch numbers of P. bernhardus were significantly higher on the treatment wayline two and three days after fishing, whilst on the four ...
Spatial variation in keystone effects: small mammal diversity
... species has strong effects on community structure at a particular place and time, then the decline or local extinction of that species due to disease or other mortality factors may cause large shifts in community structure (Collinge et al. 2008). Although the black-tailed prairie dog is often identi ...
... species has strong effects on community structure at a particular place and time, then the decline or local extinction of that species due to disease or other mortality factors may cause large shifts in community structure (Collinge et al. 2008). Although the black-tailed prairie dog is often identi ...
pptx
... Smith, M.A., Rodriguez, J.J., Whitfield, J.B., Deans, A.R., Janzen, D.H., Hallwachs, W., and Hebert, P.D.N. 2008. Extreme diversity of tropical parasitoid wasps exposed by iterative integration of natural history, DNA barcoding, morphology, and collections. Proceedings of the National Academy of Sci ...
... Smith, M.A., Rodriguez, J.J., Whitfield, J.B., Deans, A.R., Janzen, D.H., Hallwachs, W., and Hebert, P.D.N. 2008. Extreme diversity of tropical parasitoid wasps exposed by iterative integration of natural history, DNA barcoding, morphology, and collections. Proceedings of the National Academy of Sci ...
30 years of the endangered species act
... picked some of the most fervent opponents of the Endangered Species Act to lead the agencies that administer it. One example, the Department of the Interior's Assistant Secretary for Fish, Wildlife, and Parks, Craig Manson, stated in an interview, “If we are saying that the loss of species in and of ...
... picked some of the most fervent opponents of the Endangered Species Act to lead the agencies that administer it. One example, the Department of the Interior's Assistant Secretary for Fish, Wildlife, and Parks, Craig Manson, stated in an interview, “If we are saying that the loss of species in and of ...
The community of an individual: implications for the community
... at different time periods. Organisms that substantially change size may also increase in the number of individuals with which they simultaneously interact. For a focal individual, therefore, communities are represented by a dynamic turnover of individuals with which it interacts that may represent v ...
... at different time periods. Organisms that substantially change size may also increase in the number of individuals with which they simultaneously interact. For a focal individual, therefore, communities are represented by a dynamic turnover of individuals with which it interacts that may represent v ...
Ecological communities in variable environments : dynamics
... In multi-species communities, each species has its specific response to environmental stochasticity. Species-specific environmental responses can be either independent (IR), uniformly correlated (CR), or hierarchically correlated (HR) between species. IR refers to a situation where each species resp ...
... In multi-species communities, each species has its specific response to environmental stochasticity. Species-specific environmental responses can be either independent (IR), uniformly correlated (CR), or hierarchically correlated (HR) between species. IR refers to a situation where each species resp ...
v149
... The main Hawaiian Islands were once home to a diverse and vast assemblage of seabirds. The major cause of their extinction, extirpation, and decline was the extensive clearing of lowland forests by early Polynesian settlers in addition to predation by rats (Rattus exulans), which arrived in the isla ...
... The main Hawaiian Islands were once home to a diverse and vast assemblage of seabirds. The major cause of their extinction, extirpation, and decline was the extensive clearing of lowland forests by early Polynesian settlers in addition to predation by rats (Rattus exulans), which arrived in the isla ...
Environmental Factors Shaping the Littoral Biodiversity in the
... partly due to changes in land-use management and practices, but more importantly due to eutrophication. Therefore it has been a common “silent” understanding that nature protection measures, e.g. foundation of nature protection areas and biosphere reserves should be done predominantly in areas least ...
... partly due to changes in land-use management and practices, but more importantly due to eutrophication. Therefore it has been a common “silent” understanding that nature protection measures, e.g. foundation of nature protection areas and biosphere reserves should be done predominantly in areas least ...
what is needed to protect the caloosahatchee?
... Caloosahatchee Visioning process as the Caloosahatchee River and Estuary is a major ecosystem of our region and as restoration is needed to support the fragile aquatic communities that exist there, including several imperiled species. As the lifeblood of the area, restoration of the Caloosahatchee s ...
... Caloosahatchee Visioning process as the Caloosahatchee River and Estuary is a major ecosystem of our region and as restoration is needed to support the fragile aquatic communities that exist there, including several imperiled species. As the lifeblood of the area, restoration of the Caloosahatchee s ...
PDF
... inland aquatic systems with an associated decline in the ecosystem services that they can offer. The rate at which the form and function of inland waters are being modified is increasing as populations expand and their economic development grows. A global overview of dam-based impacts on large river ...
... inland aquatic systems with an associated decline in the ecosystem services that they can offer. The rate at which the form and function of inland waters are being modified is increasing as populations expand and their economic development grows. A global overview of dam-based impacts on large river ...
Payments for Ecosystem Services
... ecosystem services (or ecosystem processes and benefits) are most amenable to these marketbased or market-like approaches to environmental problems? To help answer these questions for the benefit of landowners, community groups, local governments and businesses curious about whether such systems cou ...
... ecosystem services (or ecosystem processes and benefits) are most amenable to these marketbased or market-like approaches to environmental problems? To help answer these questions for the benefit of landowners, community groups, local governments and businesses curious about whether such systems cou ...
Human Impact and the Nesting Success of the
... between Bgseline Road and South Boulder Road, Boulder, CO (40°00', 105~13'-39'59', 105~12'45").The primary canopy tree species were plains and narrowleaf cottonwood (Populus deltoides, Populus angustfolia), willow (Salixfragilis), and Russian olive (Elaeapus angustfolia). The woody understory contai ...
... between Bgseline Road and South Boulder Road, Boulder, CO (40°00', 105~13'-39'59', 105~12'45").The primary canopy tree species were plains and narrowleaf cottonwood (Populus deltoides, Populus angustfolia), willow (Salixfragilis), and Russian olive (Elaeapus angustfolia). The woody understory contai ...
SchuetteP0512 - ScholarWorks
... periods with people settled east or west of the permanent river ...................152 5.3. The proportion of lion daytime resting locations and nighttime locations that occurred in the Conservation Area when the Maasai community was settled east or west of the permanent river ...................... ...
... periods with people settled east or west of the permanent river ...................152 5.3. The proportion of lion daytime resting locations and nighttime locations that occurred in the Conservation Area when the Maasai community was settled east or west of the permanent river ...................... ...
Geographic Range
... Often, mating systems may vary within species depending upon local environmental conditions. For example, when resources are low, males may mate with only a single female and provide care for the young. When resources are abundant, the mother may be able to care for young on her own and males will a ...
... Often, mating systems may vary within species depending upon local environmental conditions. For example, when resources are low, males may mate with only a single female and provide care for the young. When resources are abundant, the mother may be able to care for young on her own and males will a ...
Rapid diversity and abundance decline in a Caribbean coral reef
... sponges quickly fall apart after dying, leaving no trace. High diversity of sponge assemblages renders loss of any particular species less perceptible, and difficult to document with the random transect data utilized in many monitoring programs. With the sole exception of 12 photo quadrats (each 1 m ...
... sponges quickly fall apart after dying, leaving no trace. High diversity of sponge assemblages renders loss of any particular species less perceptible, and difficult to document with the random transect data utilized in many monitoring programs. With the sole exception of 12 photo quadrats (each 1 m ...
Exergetic Model of Secondary Successions for Plant Communities in
... possibility of reaching multiple “climax” states through its “policlimax” concept. Westoby et al. [6] developed a new successional model, originally made for rangelands, though suitable for other ecosystems [7–9]. This is based on the description of a group of discreet vegetation “states” and “trans ...
... possibility of reaching multiple “climax” states through its “policlimax” concept. Westoby et al. [6] developed a new successional model, originally made for rangelands, though suitable for other ecosystems [7–9]. This is based on the description of a group of discreet vegetation “states” and “trans ...
Blanchard`s Cricket Frog (Acris blanchardi)
... Blanchard’s Cricket Frog (A. blanchardi) is listed as Endangered on Schedule 1 of the Species at Risk Act. It is also listed as Endangered under Ontario’s Endangered Species Act, 2007 1 . It is a tiny member of the treefrog family (Hylidae), with moist warty skin that is usually gray, brown or olive ...
... Blanchard’s Cricket Frog (A. blanchardi) is listed as Endangered on Schedule 1 of the Species at Risk Act. It is also listed as Endangered under Ontario’s Endangered Species Act, 2007 1 . It is a tiny member of the treefrog family (Hylidae), with moist warty skin that is usually gray, brown or olive ...
University of Groningen Rewilding with large herbivores Smit
... successively introduced in the area to keep the grasslands open and short. In 1983, 32 Heck cattle (Bos primigenius taurus) were introduced, followed by 18 Konik horses (Equus ferus caballus) in 1984, and 52 red deer (Cervus elaphus) in 1992–1993 (Cornelissen et al., 2013). Since then, the herbivore ...
... successively introduced in the area to keep the grasslands open and short. In 1983, 32 Heck cattle (Bos primigenius taurus) were introduced, followed by 18 Konik horses (Equus ferus caballus) in 1984, and 52 red deer (Cervus elaphus) in 1992–1993 (Cornelissen et al., 2013). Since then, the herbivore ...
View as PDF - Montana State University
... strong empirical support that species’ responses to the experimental manipulations conform to our expectations about resource and consumer limitation (17–19). For example, competitive ability of 27 grassland species was negatively correlated with their increase in abundance along a fertilization gra ...
... strong empirical support that species’ responses to the experimental manipulations conform to our expectations about resource and consumer limitation (17–19). For example, competitive ability of 27 grassland species was negatively correlated with their increase in abundance along a fertilization gra ...
Haematopus longirostris - American Oystercatcher Working Group
... size is needed to confirm this. There is no evidence of recent declines in the most important parts of the range in Tasmania or Victoria but the northern New South Wales population is in decline. The IUCN conservation status of the species is Least Concern. The main current and potential threats inc ...
... size is needed to confirm this. There is no evidence of recent declines in the most important parts of the range in Tasmania or Victoria but the northern New South Wales population is in decline. The IUCN conservation status of the species is Least Concern. The main current and potential threats inc ...
Insect herbivory in an experimental agroecosystem: the relative
... We evaluated effects of herbivore exclusion on clover biomass using a profile ANOVA (Tabachnick and Fidell 2000). This procedure, which is comparable to repeated measures ANOVA, allows for the two clover biomass measurements (exclosure and control) taken from each plot to be non-independent. Clover ...
... We evaluated effects of herbivore exclusion on clover biomass using a profile ANOVA (Tabachnick and Fidell 2000). This procedure, which is comparable to repeated measures ANOVA, allows for the two clover biomass measurements (exclosure and control) taken from each plot to be non-independent. Clover ...
Open or download EMP bulletin as a PDF file
... of a site and evaluate its potential historical significance. Collected information can also help define questions for future research. Significant archaeological sites are recommended for preservation as an important part of Hawai‘i’s unique cultural history; however, some sites cannot always be pr ...
... of a site and evaluate its potential historical significance. Collected information can also help define questions for future research. Significant archaeological sites are recommended for preservation as an important part of Hawai‘i’s unique cultural history; however, some sites cannot always be pr ...
Cadotte2007 Ecology
... Colpidium striatum (Fig. 2d) shows significantly greater occupancy at all disturbance treatments compared to the no-disturbance control, and Tetrahymena pyriformis (Fig. 2k) is only found in extremely high disturbance treatments. ...
... Colpidium striatum (Fig. 2d) shows significantly greater occupancy at all disturbance treatments compared to the no-disturbance control, and Tetrahymena pyriformis (Fig. 2k) is only found in extremely high disturbance treatments. ...
The Distribution, Abundance And Ecological Impacts Of Invasive
... Table 3.10 Dry and wet season bird surveys.................................:................. 50 Table 3.1 IDry and wet season mammal surveys...............................................50 Table 3.12 Diversity and evenness indices in un-.invaded and invaded areas................................... ...
... Table 3.10 Dry and wet season bird surveys.................................:................. 50 Table 3.1 IDry and wet season mammal surveys...............................................50 Table 3.12 Diversity and evenness indices in un-.invaded and invaded areas................................... ...
Habitat conservation
Habitat conservation is a land management practice that seeks to conserve, protect and restore habitat areas for wild plants and animals, especially conservation reliant species, and prevent their extinction, fragmentation or reduction in range. It is a priority of many groups that cannot be easily characterized in terms of any one ideology.