The Rise of the Mesopredator
... (habitat and resources) and top-down (apex predator) forces. This approach has been employed nicely in a large-scale study examining the relative influence of apex predators (wolves and lynx) and land-use changes on red fox populations in Sweden (Elmhagen and Rushton 2007). Trade-offs inherent to pr ...
... (habitat and resources) and top-down (apex predator) forces. This approach has been employed nicely in a large-scale study examining the relative influence of apex predators (wolves and lynx) and land-use changes on red fox populations in Sweden (Elmhagen and Rushton 2007). Trade-offs inherent to pr ...
A global overview on the diet of the dice snake
... distribution and presumably large population size, it is categorised as least concern by IUCN (2012). However, it is considered to be threatened in a number of western and central European states, with low genetic variation in some populations (Gautschi et al. 2002; Guicking et al. 2004) and its wor ...
... distribution and presumably large population size, it is categorised as least concern by IUCN (2012). However, it is considered to be threatened in a number of western and central European states, with low genetic variation in some populations (Gautschi et al. 2002; Guicking et al. 2004) and its wor ...
Changes in grassland songbird abundances through the northern mixed-grass prairie.
... Table 1. The average precipitation (mm) for the years 1971 through 2000 per month and the total precipitation (mm) per month per year. Data collected by Environment Canada at the Val Marie weather station (location: 49.370, - 107.848) in southern Saskatchewan (source: Government of Canada 2011). Tab ...
... Table 1. The average precipitation (mm) for the years 1971 through 2000 per month and the total precipitation (mm) per month per year. Data collected by Environment Canada at the Val Marie weather station (location: 49.370, - 107.848) in southern Saskatchewan (source: Government of Canada 2011). Tab ...
Chapter 54(Community Ecology)
... by whether they help, harm, or have no effect on the species involved • Ecologists call relationships between species in a community interspecific interactions • Examples are competition, predation, herbivory, and symbiosis (parasitism, mutualism, and commensalism) • Interspecific interactions can a ...
... by whether they help, harm, or have no effect on the species involved • Ecologists call relationships between species in a community interspecific interactions • Examples are competition, predation, herbivory, and symbiosis (parasitism, mutualism, and commensalism) • Interspecific interactions can a ...
Management Guidelines for the Protection of Heronries in Ontario
... Herons of all species are unpredictable in their response to the disruption of a colony. The severity of the response does not always correspond to the magnitude of the disturbance, since even seemingly "innocuous" activities can produce serious results. The effects of human disturbance very in resp ...
... Herons of all species are unpredictable in their response to the disruption of a colony. The severity of the response does not always correspond to the magnitude of the disturbance, since even seemingly "innocuous" activities can produce serious results. The effects of human disturbance very in resp ...
biodiversity in the high parana river floodplain
... 190 kIn) are within Brazil where the river drains 891,000 km2 i.e., about 10.5% of the country's area. The falls that formerly separatedthe high and middle sections are now submerged beneath the Itaipu reservoir. The two rivers that form Parana river (Grande and Paranaiba) are typical plateau rivers ...
... 190 kIn) are within Brazil where the river drains 891,000 km2 i.e., about 10.5% of the country's area. The falls that formerly separatedthe high and middle sections are now submerged beneath the Itaipu reservoir. The two rivers that form Parana river (Grande and Paranaiba) are typical plateau rivers ...
Forvaltningstiltak for sjøfuglbestander i Norge
... Threatened bird species Congregatory bird species Assemblages of restricted-range bird species Assemblages of biome-restricted bird species Criteria have been developed such that, by applying different (‘staggered’) numerical thresholds, the international importance of a site for a species may be ca ...
... Threatened bird species Congregatory bird species Assemblages of restricted-range bird species Assemblages of biome-restricted bird species Criteria have been developed such that, by applying different (‘staggered’) numerical thresholds, the international importance of a site for a species may be ca ...
pdf
... zebra locations to the mean distance to the closest bomas for random points in the area used by Grevy’s zebra. The number of random points used is the same as the number of individual Grevy’s zebra observations. For this analysis, we define the area of use as the minimum convex polygon that encompas ...
... zebra locations to the mean distance to the closest bomas for random points in the area used by Grevy’s zebra. The number of random points used is the same as the number of individual Grevy’s zebra observations. For this analysis, we define the area of use as the minimum convex polygon that encompas ...
Establishment of fish stock recovery areas
... detectable for some species within a year or two of protection. Other species respond more slowly. Long-term studies of reserves show that benefits to long-lived and slow growing species, and to habitats, can continue to increase over periods of decades. Recovery of protected populations typically t ...
... detectable for some species within a year or two of protection. Other species respond more slowly. Long-term studies of reserves show that benefits to long-lived and slow growing species, and to habitats, can continue to increase over periods of decades. Recovery of protected populations typically t ...
2008snail
... Lab Preparation: The propagation lab should know well in advance prior to reintroduction, snails should be maintained on leaves from plants at the proposed reintroduction site so they can adjust to the new food supply for at least a month. Fungus plates provided normally in the lab will be removed d ...
... Lab Preparation: The propagation lab should know well in advance prior to reintroduction, snails should be maintained on leaves from plants at the proposed reintroduction site so they can adjust to the new food supply for at least a month. Fungus plates provided normally in the lab will be removed d ...
Legume species identity and soil nitrogen supply elevated atmospheric [CO
... 1996; Provorov & Tikhonovich, 2003). If legumes differ in their N requirements and relationships with N-fixing bacteria, these species could exhibit a range of dependence on bacterial N fixation. In N-limited, legume-rich plant communities, such as grasslands and savannas, these differences might al ...
... 1996; Provorov & Tikhonovich, 2003). If legumes differ in their N requirements and relationships with N-fixing bacteria, these species could exhibit a range of dependence on bacterial N fixation. In N-limited, legume-rich plant communities, such as grasslands and savannas, these differences might al ...
Name ______ ECOLOGY What makes a world habitable? What are
... How many places in our solar system currently support life (that we know of)? ________________ From the chart above, which planets or moons could potentially support life and why? ...
... How many places in our solar system currently support life (that we know of)? ________________ From the chart above, which planets or moons could potentially support life and why? ...
California Tiger Salamander
... metamorphosis. In general, salamanders require 10 weeks living in ponded water for complete metamorphosis. If a pond dries prior to metamorphosis, the larvae will desiccate and die (U.S. Fish and Wildlife Service 2000). The California tiger salamander breeds primarily in vernal pools and swales— uni ...
... metamorphosis. In general, salamanders require 10 weeks living in ponded water for complete metamorphosis. If a pond dries prior to metamorphosis, the larvae will desiccate and die (U.S. Fish and Wildlife Service 2000). The California tiger salamander breeds primarily in vernal pools and swales— uni ...
Download appendices
... Population Reference Site (PopRefSite) The Population Reference Site (PopRefSite) is the primary data table in establishing plant or animal population sites. The PopRefSite identifies the Population Name, whether it is In situ, Ex situ or Reintro, and provides directions to the site, etc. The PopRef ...
... Population Reference Site (PopRefSite) The Population Reference Site (PopRefSite) is the primary data table in establishing plant or animal population sites. The PopRefSite identifies the Population Name, whether it is In situ, Ex situ or Reintro, and provides directions to the site, etc. The PopRef ...
Sponge Systematics by Starfish: Predators
... individuals of the unusual form were also readily distinguishable among individuals of the normal T. ignis on nearby mangroves. In January 2002, I also noticed the unusual form growing on mangrove roots, along with T. ignis, sensu stricto, in Bocas del Toro, Panama. Spicules of the two forms are ind ...
... individuals of the unusual form were also readily distinguishable among individuals of the normal T. ignis on nearby mangroves. In January 2002, I also noticed the unusual form growing on mangrove roots, along with T. ignis, sensu stricto, in Bocas del Toro, Panama. Spicules of the two forms are ind ...
Fish and Phytoplankton Exhibit Contrasting Temporal Species
... Understanding patterns in species abundance has been a central goal of ecology for several decades [1–4]. Macroecology, the statistical examination of species across large scales [5], has mostly focused on spatial patterns. Temporal components of species abundance distributions were included in earl ...
... Understanding patterns in species abundance has been a central goal of ecology for several decades [1–4]. Macroecology, the statistical examination of species across large scales [5], has mostly focused on spatial patterns. Temporal components of species abundance distributions were included in earl ...
aggregated seed arrival alters plant diversity in
... seed arrival differed between uniform and aggregated treatments while seed density was held constant at the plot scale. Seed mass was used as a surrogate for seed number based on developed seed mass–seed number relationships for each species. To mimic natural seed arrival, seeds were hand scattered ...
... seed arrival differed between uniform and aggregated treatments while seed density was held constant at the plot scale. Seed mass was used as a surrogate for seed number based on developed seed mass–seed number relationships for each species. To mimic natural seed arrival, seeds were hand scattered ...
CHAPTER 3 SHORELINE ENVIRONMENT DESIGNATIONS AND
... environment. At the same time, the City will place reasonable standards and restrictions on development so that such development does not disrupt or destroy the character of the environment. The basic intent of this system is to utilize performance standards which regulate use activities in accordan ...
... environment. At the same time, the City will place reasonable standards and restrictions on development so that such development does not disrupt or destroy the character of the environment. The basic intent of this system is to utilize performance standards which regulate use activities in accordan ...
seabird community structure along a productivity gradient
... That seabird communities change with their marine habitat is well documented. However, relatively little progress has been made with respect to understanding why. How are features of an oceanic environment important in structuring seabird communities, and by what mechanisms does this structuring tak ...
... That seabird communities change with their marine habitat is well documented. However, relatively little progress has been made with respect to understanding why. How are features of an oceanic environment important in structuring seabird communities, and by what mechanisms does this structuring tak ...
Functional over-redundancy and high functional vulnerability in
... of the FEs are left without insurance, these levels all being significantly higher than expected by chance. Thus, our study shows that, even in high-diversity systems, such as tropical reefs, functional diversity remains highly vulnerable to species loss. Although further investigations are needed t ...
... of the FEs are left without insurance, these levels all being significantly higher than expected by chance. Thus, our study shows that, even in high-diversity systems, such as tropical reefs, functional diversity remains highly vulnerable to species loss. Although further investigations are needed t ...
L E T T E R
... specialists restricted to a plant genus or family, of biomass of their host plants. We also included the ratio of total predator : herbivore abundance summed over the entire study duration in the analysis as a measure of trophic control on herbivore population stability. We note that, because of pla ...
... specialists restricted to a plant genus or family, of biomass of their host plants. We also included the ratio of total predator : herbivore abundance summed over the entire study duration in the analysis as a measure of trophic control on herbivore population stability. We note that, because of pla ...
Gopher Tortoise - Chattahoochee Nature Center
... coastal dunes or in human-made environments such as pastures, grassy roadsides and old fields. The gopher tortoise is a keystone species, meaning its extinction would result in measurable changes to the ecosystem in which it occurs. Specifically, other animals, such as gopher frogs, several species ...
... coastal dunes or in human-made environments such as pastures, grassy roadsides and old fields. The gopher tortoise is a keystone species, meaning its extinction would result in measurable changes to the ecosystem in which it occurs. Specifically, other animals, such as gopher frogs, several species ...
Functional uniformity - Portsmouth Research Portal
... lower latitude systems were particularly similar in all these respects. Although sharing the ...
... lower latitude systems were particularly similar in all these respects. Although sharing the ...
complaint - Earthjustice
... Gulf of Alaska 2004—Coincident with a joint training exercise conducted by the Navy in the Gulf of Alaska in June 2004, at least six beaked whales stranded on nearby shores. No analysis of the injuries to these whales has yet been released. Hawaii 2004—During a major training exercise off Hawaii, ca ...
... Gulf of Alaska 2004—Coincident with a joint training exercise conducted by the Navy in the Gulf of Alaska in June 2004, at least six beaked whales stranded on nearby shores. No analysis of the injuries to these whales has yet been released. Hawaii 2004—During a major training exercise off Hawaii, ca ...
Ecosystem Health of Large Lakes - Great Lakes Fishery Commission
... processes and species abundances within “historical” or normal range that allows the system to be sustainable over time. Ecosystem health for Callicott is not necessarily dependent on persistence of individual species or even maintaining biodiversity, nor does it require maintenance of some referen ...
... processes and species abundances within “historical” or normal range that allows the system to be sustainable over time. Ecosystem health for Callicott is not necessarily dependent on persistence of individual species or even maintaining biodiversity, nor does it require maintenance of some referen ...
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.