Species Introduction
... silver in colour, and have long teeth, some of which are on the tongue. Smelt are invaders in Manitoba and are not welcome because of the damage they may do to native fish populations. They have been found in Lake Winnipeg. They may have migrated naturally through river systems from Ontario, or may ...
... silver in colour, and have long teeth, some of which are on the tongue. Smelt are invaders in Manitoba and are not welcome because of the damage they may do to native fish populations. They have been found in Lake Winnipeg. They may have migrated naturally through river systems from Ontario, or may ...
Introduction: - Library - Conservation International
... Protecting areas is the most important and successful tactic for maintaining biodiversity and avoiding species extinctions (Bruner et al. 2001) Measuring both the extent and effectiveness of protected areas is regarded as a useful indicator for meeting large-scale biodiversity targets (Chape et al, ...
... Protecting areas is the most important and successful tactic for maintaining biodiversity and avoiding species extinctions (Bruner et al. 2001) Measuring both the extent and effectiveness of protected areas is regarded as a useful indicator for meeting large-scale biodiversity targets (Chape et al, ...
Introduction: - Library - Conservation International
... Protecting areas is the most important and successful tactic for maintaining biodiversity and avoiding species extinctions (Bruner et al. 2001) Measuring both the extent and effectiveness of protected areas is regarded as a useful indicator for meeting large-scale biodiversity targets (Chape et al, ...
... Protecting areas is the most important and successful tactic for maintaining biodiversity and avoiding species extinctions (Bruner et al. 2001) Measuring both the extent and effectiveness of protected areas is regarded as a useful indicator for meeting large-scale biodiversity targets (Chape et al, ...
Marine Invertebrate Conservation: Evaluation of Fisheries Over
... crabs uses SRR data (e.g., Reeves, 1982), respectively). On average, quotas for conalthough some current fisheries are near his- servative management should be less than toric low levels (Otto, 1990). Evidence of a estimated average annual recruitment to the useable SRR, modified to incorporate area ...
... crabs uses SRR data (e.g., Reeves, 1982), respectively). On average, quotas for conalthough some current fisheries are near his- servative management should be less than toric low levels (Otto, 1990). Evidence of a estimated average annual recruitment to the useable SRR, modified to incorporate area ...
Canada`s Coastal Rainforest
... Canada’s Coastal Rainforest Columbia’s coastal temperate rainforest amongst the wettest non-tropical areas in the world! As most of the precipitation occurs in winter, some areas in the forest close to shore are kept humid during the summer by the trees which extract water from the foggy air, creat ...
... Canada’s Coastal Rainforest Columbia’s coastal temperate rainforest amongst the wettest non-tropical areas in the world! As most of the precipitation occurs in winter, some areas in the forest close to shore are kept humid during the summer by the trees which extract water from the foggy air, creat ...
Neutral theory and community ecology
... tests of the neutral theory fail to invalidate its most recent versions, although they have been critical to emphasize the deficiencies of earlier versions. Much of this research has focused on tropical rainforest plants, and the present review reflects this bias. It would be important to extend thi ...
... tests of the neutral theory fail to invalidate its most recent versions, although they have been critical to emphasize the deficiencies of earlier versions. Much of this research has focused on tropical rainforest plants, and the present review reflects this bias. It would be important to extend thi ...
A Study of the Aquatic Insects of Two Rocky Mountain Streams in
... and .Notonecta . kirbyi (backswimmers). Faunal successions with changes in elevation are also to be expected (see Allan, 1975). Collections at higher elevations produced different species such as the perlid stoneflies Claasenia sabulosa and .Doroneuria theodora. The number of genera collected in eac ...
... and .Notonecta . kirbyi (backswimmers). Faunal successions with changes in elevation are also to be expected (see Allan, 1975). Collections at higher elevations produced different species such as the perlid stoneflies Claasenia sabulosa and .Doroneuria theodora. The number of genera collected in eac ...
Australian Biodiversity Under Threat
... as dead or decaying trees with holes or hollows essential for some animals. There are also many difficulties with the animals themselves. The distribution of amphibians and reptiles seems to be controlled largely by micro-environment rather than by broad vegetation associations. Soil hardness, groun ...
... as dead or decaying trees with holes or hollows essential for some animals. There are also many difficulties with the animals themselves. The distribution of amphibians and reptiles seems to be controlled largely by micro-environment rather than by broad vegetation associations. Soil hardness, groun ...
RESOURCE RESILIENCE, HUMAN NICHE CONSTRUCTION, AND
... Premier among the r-selected generalists that came to dominate the simplified Holocene ungulate guild of the eastern woodlands was the white-tailed deer (Odocoileus virginianus), which became the prey for human hunters in the region (Wolverton et al. 2008). In addition to their relatively large body ...
... Premier among the r-selected generalists that came to dominate the simplified Holocene ungulate guild of the eastern woodlands was the white-tailed deer (Odocoileus virginianus), which became the prey for human hunters in the region (Wolverton et al. 2008). In addition to their relatively large body ...
FACTORS AFFECTING IMPLEMENTATION OF RECOVERY PLANS
... implemented, underway, completed), which were available for 176 of the 181 species. Precise dates of implementation for each task were unavailable. For each species, the percentage of implemented recovery tasks was calculated by dividing the number of tasks that were underway or completed by the tot ...
... implemented, underway, completed), which were available for 176 of the 181 species. Precise dates of implementation for each task were unavailable. For each species, the percentage of implemented recovery tasks was calculated by dividing the number of tasks that were underway or completed by the tot ...
B. Current Taxonomic Status History: How many manzanita species
... Arctostaphylos hookeri subsp. hearstiorum is known only from the coastal prairie and chaparral areas from the Hearst Ranch near San Simeon, San Luis Obispo County. Arctostaphylos hookeri subsp. hookeri is restricted to chaparral areas near the coast on sands and clays in the vicinity of the City of ...
... Arctostaphylos hookeri subsp. hearstiorum is known only from the coastal prairie and chaparral areas from the Hearst Ranch near San Simeon, San Luis Obispo County. Arctostaphylos hookeri subsp. hookeri is restricted to chaparral areas near the coast on sands and clays in the vicinity of the City of ...
A Consumer-Resource Approach to Community Structure1 The
... given community may contain hundreds of communities suggest that there may be a species, each interacting with at least sev- few major underlying factors or processes eral other species and an often variable that constrain many communities (Macabiotic environment. Amid this complex- Arthur, 1972; La ...
... given community may contain hundreds of communities suggest that there may be a species, each interacting with at least sev- few major underlying factors or processes eral other species and an often variable that constrain many communities (Macabiotic environment. Amid this complex- Arthur, 1972; La ...
Canada-Wide Adoption of the Seafood Watch Program`s Seafood
... include: inherent vulnerability, abundance, and impacts on habitat and ecosystem for the target species and other affected species which is condensed into a simple coloured label system. ...
... include: inherent vulnerability, abundance, and impacts on habitat and ecosystem for the target species and other affected species which is condensed into a simple coloured label system. ...
Marine Ecology Progress Series 495:291
... diffuse? Concentrated predation within a community occurs when one predator species determines patterns of community structure, such as the behaviour, distribution, composition and diversity of prey (Menge et al. 1994). In contrast, diffuse predation involves a suite of species all preying upon prey ...
... diffuse? Concentrated predation within a community occurs when one predator species determines patterns of community structure, such as the behaviour, distribution, composition and diversity of prey (Menge et al. 1994). In contrast, diffuse predation involves a suite of species all preying upon prey ...
Bird community dynamics in a primaeval forest
... 1980a; a method of producing nearabsolute estimates), were repeated every year from 1975, producing a 25+ year data series. In addition to data on birds, information was gathered also on the variation in those environmental variables that might be relevant, such as weather, leafeating caterpillars, ...
... 1980a; a method of producing nearabsolute estimates), were repeated every year from 1975, producing a 25+ year data series. In addition to data on birds, information was gathered also on the variation in those environmental variables that might be relevant, such as weather, leafeating caterpillars, ...
Biol. 4974/5974 Evolution Lecture #1
... production of the higher animals, directly follows. There is grandeur in this view of life, with its several powers, having been originally breathed into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endles ...
... production of the higher animals, directly follows. There is grandeur in this view of life, with its several powers, having been originally breathed into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endles ...
Community Ecology: Is It Time to Move On?
... had sufficient imagination to have deduced more useful and interesting laws, but he is skeptical about our future prospects, and I agree with him. We might both be wrong. It may be that an ever-increasing catalog of detailed case studies, growing understanding of indirect interactions, and increased ...
... had sufficient imagination to have deduced more useful and interesting laws, but he is skeptical about our future prospects, and I agree with him. We might both be wrong. It may be that an ever-increasing catalog of detailed case studies, growing understanding of indirect interactions, and increased ...
Seasonally Dry Tropical Forest Biodiversity and Conservation Value
... and connectivity to sustain animal populations (e.g., Daily et al. 2001, 2003; Harvey et al. 2006; Manning et al. 2006). Numerous studies have documented bird diversity within pastoral dry-forest landscapes. For example, in the inter-Andean Cauca Valley of northwestern Colombia, a preliminary survey ...
... and connectivity to sustain animal populations (e.g., Daily et al. 2001, 2003; Harvey et al. 2006; Manning et al. 2006). Numerous studies have documented bird diversity within pastoral dry-forest landscapes. For example, in the inter-Andean Cauca Valley of northwestern Colombia, a preliminary survey ...
Biodiversity: an introduction - European Commission
... 2. Competition: When a new exploitable resource becomes available, individuals within a given population may benefit from choosing to specialise on only one resource (i.e. either the new or the original resource). Speciation can arise when the offspring of parents that specialise on the same resourc ...
... 2. Competition: When a new exploitable resource becomes available, individuals within a given population may benefit from choosing to specialise on only one resource (i.e. either the new or the original resource). Speciation can arise when the offspring of parents that specialise on the same resourc ...
Similarities in perceived predation risk prevent temporal partitioning
... However, if nocturnal and diurnal species perceive landscape features similarly with regards to predation risk (e.g., safety under cover for rodents), then this perception could increase exploitative competition as both species would restrict their foraging to the same habitats and/or patches, albei ...
... However, if nocturnal and diurnal species perceive landscape features similarly with regards to predation risk (e.g., safety under cover for rodents), then this perception could increase exploitative competition as both species would restrict their foraging to the same habitats and/or patches, albei ...
Ecological Society of America - Wentworth Group of Concerned
... In historical records there is a bias for and against the inclusion of certain species in the lists, the geographical location of surveys is changing through time and the mean search effort is changing through time (Franklin 1999). Because of violation of these assumptions associated with the use o ...
... In historical records there is a bias for and against the inclusion of certain species in the lists, the geographical location of surveys is changing through time and the mean search effort is changing through time (Franklin 1999). Because of violation of these assumptions associated with the use o ...
BCS311 Module 5
... Oxygen is the byproduct of this process called photosynthesis. However, autotrophs also need to produce complex organic molecules other than glucose (e.g., proteins, fats). The energy required for their synthesis is taken from respiration, which the autotrophs perform by splitting stored glucose (Fi ...
... Oxygen is the byproduct of this process called photosynthesis. However, autotrophs also need to produce complex organic molecules other than glucose (e.g., proteins, fats). The energy required for their synthesis is taken from respiration, which the autotrophs perform by splitting stored glucose (Fi ...
Species richness and environmental fluctuation affect population
... The amplitude of salinity variation selected for the experiment was within the normal range of those encountered in the field by two (Ceriodaphnia and Potamocypris) of the three species occurring in Jamaica, with Ceriodaphnia preferring very low salinities. For example, based on long-term measuremen ...
... The amplitude of salinity variation selected for the experiment was within the normal range of those encountered in the field by two (Ceriodaphnia and Potamocypris) of the three species occurring in Jamaica, with Ceriodaphnia preferring very low salinities. For example, based on long-term measuremen ...
Bifrenaria
Bifrenaria, abbreviated Bif. in horticultural trade, is a genus of plant in family Orchidaceae. It contains 20 species found in Panama, Trinidad and South America. There are no known uses for them, but their abundant, and at first glance artificial, flowers, make them favorites of orchid growers.The genus can be split in two clearly distinct groups: one of highly robust plants with large flowers, that encompass the first species to be classified under the genus Bifrenaria; other of more delicate plants with smaller flowers occasionally classified as Stenocoryne or Adipe. There are two additional species that are normally classified as Bifrenaria, but which molecular analysis indicate to belong to different orchid groups entirely. One is Bifrenaria grandis which is endemic to Bolívia and which is now placed in Lacaena, and Bifrenaria steyermarkii, an inhabitant of the northern Amazon Forest, which does not have an alternative classification.