This is an electronic reprint of the original article. This reprint may
... 10.8 m. Both lakes were originally inhabited by only very scarce native crayfish (Astacus astacus L.) populations and introductions of signal crayfish (Pacifastacus leniusculus) of North American origin started in the early 1990s. The distribution of signal crayfish in the study lakes is still patch ...
... 10.8 m. Both lakes were originally inhabited by only very scarce native crayfish (Astacus astacus L.) populations and introductions of signal crayfish (Pacifastacus leniusculus) of North American origin started in the early 1990s. The distribution of signal crayfish in the study lakes is still patch ...
Prey selection and dietary overlap among
... (Age-0) of 4 forage fish species, walleye pollock Theragra chalcogramma, Pacific sandlance Ammodytes hexapterus, Pacific herring Clupea pallasi, and pink salmon Oncorhynchus gorbuscha. Zooplankton samples collected in July–August 1995 to 1998 showed great similarity among years (86 to 96%), which al ...
... (Age-0) of 4 forage fish species, walleye pollock Theragra chalcogramma, Pacific sandlance Ammodytes hexapterus, Pacific herring Clupea pallasi, and pink salmon Oncorhynchus gorbuscha. Zooplankton samples collected in July–August 1995 to 1998 showed great similarity among years (86 to 96%), which al ...
Variation in Population Synchrony in a Multi
... Synchronous temporal variations in demographic parameters have been documented among different populations of single species [1–5]. In contrast, synchrony among sympatric populations of different species has received much less attention [6–9]. In the limited number of studies examining synchrony in ...
... Synchronous temporal variations in demographic parameters have been documented among different populations of single species [1–5]. In contrast, synchrony among sympatric populations of different species has received much less attention [6–9]. In the limited number of studies examining synchrony in ...
active organism Chrysoperla carnea
... Today, the C. carnea complex comprises 21 valid described species (Table 1). In addition, several new cryptic taxa have been identified but not yet described. Poor sampling of the C. carnea complex across much of Asia, northern and central Africa, and western North America makes it very likely that ...
... Today, the C. carnea complex comprises 21 valid described species (Table 1). In addition, several new cryptic taxa have been identified but not yet described. Poor sampling of the C. carnea complex across much of Asia, northern and central Africa, and western North America makes it very likely that ...
Enos Lake Benthic and Limnetic Threespine Stickleback Species
... Limnetics were thought to mature on average as one-year-olds, and rarely live beyond a single breeding season. In the lab, reproductive females laid multiple batches of eggs in quick succession, and were thought to do the same in the wild. Nesting males would mate with several to many females, and m ...
... Limnetics were thought to mature on average as one-year-olds, and rarely live beyond a single breeding season. In the lab, reproductive females laid multiple batches of eggs in quick succession, and were thought to do the same in the wild. Nesting males would mate with several to many females, and m ...
Current Status, Distribution, and Conservation of the Burrowing Owl
... It is clear that the number one reason for the overall decline of Burrowing Owls is the destruction and alteration of their habitat. This has come about largely due to development of grasslands into agricultural croplands and through destruction of prairie dog towns. As long ago as the 1930’s, it wa ...
... It is clear that the number one reason for the overall decline of Burrowing Owls is the destruction and alteration of their habitat. This has come about largely due to development of grasslands into agricultural croplands and through destruction of prairie dog towns. As long ago as the 1930’s, it wa ...
A Brief History of Dinoflagellate Feeding Research
... anecdotal stage to an experimental and quantitative stage, involving analysis of rates, ecological roles, and survival strategies; however, important new descriptions are still emerging. It has been shown that dinoflagellates, despite having relatively low densities and growth rates compared to cili ...
... anecdotal stage to an experimental and quantitative stage, involving analysis of rates, ecological roles, and survival strategies; however, important new descriptions are still emerging. It has been shown that dinoflagellates, despite having relatively low densities and growth rates compared to cili ...
Introduction
... Abstract: Because the karst environment is very sensitive to disturbance, once a strong disturbance occurs in a karst ecosystem it will undergo reverse succession, and both its recovery and restoration might be difficult. So, biodiversity is an important factor in maintaining existing karst landscap ...
... Abstract: Because the karst environment is very sensitive to disturbance, once a strong disturbance occurs in a karst ecosystem it will undergo reverse succession, and both its recovery and restoration might be difficult. So, biodiversity is an important factor in maintaining existing karst landscap ...
Action
... Develop and maintain an accurate inventory of habitat types within the Sutherland Shire * Identify and obtain relevant existing databases, eg. soils, vegetation, asset management studies * Identify data gaps in existing databases. * Complete required studies, and build on existing databases. Informa ...
... Develop and maintain an accurate inventory of habitat types within the Sutherland Shire * Identify and obtain relevant existing databases, eg. soils, vegetation, asset management studies * Identify data gaps in existing databases. * Complete required studies, and build on existing databases. Informa ...
Patterns of trophic niche divergence between invasive and native
... patterns of either niche overlap or divergence detected in mesocosm experiments were apparent between the species at larger spatial scales. Using stable isotope analysis, their feeding relationships were assessed initially in the mesocosms (1000 L) and then in small ponds (<400 m2) and large ponds ( ...
... patterns of either niche overlap or divergence detected in mesocosm experiments were apparent between the species at larger spatial scales. Using stable isotope analysis, their feeding relationships were assessed initially in the mesocosms (1000 L) and then in small ponds (<400 m2) and large ponds ( ...
Kelp Forest
... note is the blue-rayed limpet Helcion pellucidum; this small mollusk eats its way into the stipe eventually weakening the plant sufficiently, for it to break off during a storm. ...
... note is the blue-rayed limpet Helcion pellucidum; this small mollusk eats its way into the stipe eventually weakening the plant sufficiently, for it to break off during a storm. ...
Etowah River Basin Stressors Analysis - Web8
... The Etowah River Basin (Figure 1-1) is a highly biodiverse and highly imperiled aquatic ecosystem located just north of Atlanta, Georgia. Its precarious status and diversity of fauna have made it an object of scientific research for the last several decades. In recent years it has also become the fo ...
... The Etowah River Basin (Figure 1-1) is a highly biodiverse and highly imperiled aquatic ecosystem located just north of Atlanta, Georgia. Its precarious status and diversity of fauna have made it an object of scientific research for the last several decades. In recent years it has also become the fo ...
Wolf-Cougar Co-occurrence in the Central Canadian Rocky Mountains
... with an increase in wolf population and expansion of range. Similarly, cougars may switch their prey source as they spatially separate themselves from wolves (Bartnick et al. 2013). In Yellowstone National Park, wolves and cougars have differing kill rates throughout the year; wolves acquire the lea ...
... with an increase in wolf population and expansion of range. Similarly, cougars may switch their prey source as they spatially separate themselves from wolves (Bartnick et al. 2013). In Yellowstone National Park, wolves and cougars have differing kill rates throughout the year; wolves acquire the lea ...
Ecological role of vertebrate scavengers in urban ecosystems in the
... off. Experiments were repeated at each site between four and nine times ...
... off. Experiments were repeated at each site between four and nine times ...
American Bullfrog - Oregon State University
... organisms to the point that they are no longer able to breathe and it causes skin sloughing. The larval/ tadpole is less susceptible to this problem because they do not have keratin in their skin which is what chtrid eats. In a recent study at Oregon State Univer sity, researchers found that contra ...
... organisms to the point that they are no longer able to breathe and it causes skin sloughing. The larval/ tadpole is less susceptible to this problem because they do not have keratin in their skin which is what chtrid eats. In a recent study at Oregon State Univer sity, researchers found that contra ...
Salinized rivers: degraded systems or new habitats for salt
... Already salt-adapted species might disperse to and colonize salinizing rivers from nearby oceans, estuaries and naturally saline lakes and rivers (figure 2). There are examples of marine/estuarine species colonizing salinized rivers in southwest Australia [65], France [19] and Germany [66]. Neverthe ...
... Already salt-adapted species might disperse to and colonize salinizing rivers from nearby oceans, estuaries and naturally saline lakes and rivers (figure 2). There are examples of marine/estuarine species colonizing salinized rivers in southwest Australia [65], France [19] and Germany [66]. Neverthe ...
A Survey and Overview of Habitat Fragmentation Experiments
... size. Patch sizes were chosen relative to the questions being addressed and the organism(s) of study. Generally, as the landscape scale increased, there were fewer replicates at larger fragment sizes. There was a threshold of decrease in degree of replication at roughly 0.2 ha; above this size, the ...
... size. Patch sizes were chosen relative to the questions being addressed and the organism(s) of study. Generally, as the landscape scale increased, there were fewer replicates at larger fragment sizes. There was a threshold of decrease in degree of replication at roughly 0.2 ha; above this size, the ...
strayer 2008 freshwater invertebrate conservation
... freshwater invertebrates around the world may already be extinct or imperiled. Second, human pressures on freshwater resources are intense and will increase in the coming decades, putting yet more species at risk. Third, scientific knowledge about freshwater invertebrates, although substantial and u ...
... freshwater invertebrates around the world may already be extinct or imperiled. Second, human pressures on freshwater resources are intense and will increase in the coming decades, putting yet more species at risk. Third, scientific knowledge about freshwater invertebrates, although substantial and u ...
Influence of Alternate Host Densities on Brown
... influenced by density of the host species,althoughtests of host density are relatively rare. We examined parasitismrates relative to the density of individual host speciesand densities of coexisting host species. We monitored 392 nests among coexisting host species and measuredtheir densitiesamong s ...
... influenced by density of the host species,althoughtests of host density are relatively rare. We examined parasitismrates relative to the density of individual host speciesand densities of coexisting host species. We monitored 392 nests among coexisting host species and measuredtheir densitiesamong s ...
4. the affected environment - South African Heritage Resources
... seafloor topographic features (Nelson and Hutchings 1983). Current velocities in continental shelf areas generally range between 10–30 cm/s (Boyd & Oberholster 1994). Shelf edge jet currents exist off both Cape Columbine (Nelson and Hutchings 1983) and the Cape Peninsula (Bang 1970; Shillington 1998 ...
... seafloor topographic features (Nelson and Hutchings 1983). Current velocities in continental shelf areas generally range between 10–30 cm/s (Boyd & Oberholster 1994). Shelf edge jet currents exist off both Cape Columbine (Nelson and Hutchings 1983) and the Cape Peninsula (Bang 1970; Shillington 1998 ...
predation on speared red lionfish, pterois volitans, by spotted moray
... Graham’s Harbor (24u079N, 74u279W) in the northeast part of San Salvador, Bahamas, on the morning of March 15, 2012. Graham’s Harbor is a protected low-energy environment with a variety of artificial structures, sea grass beds, and small patch reefs. A previous study found only P. volitans and no de ...
... Graham’s Harbor (24u079N, 74u279W) in the northeast part of San Salvador, Bahamas, on the morning of March 15, 2012. Graham’s Harbor is a protected low-energy environment with a variety of artificial structures, sea grass beds, and small patch reefs. A previous study found only P. volitans and no de ...
Emerging patterns in the comparative analysis of phylogenetic
... increased to the point where comparison of their results can now be used to highlight successes and deficiencies in the approach, and to detect emerging patterns in community organization. We review studies of the phylogenetic structure of communities of different major taxa and trophic levels, acro ...
... increased to the point where comparison of their results can now be used to highlight successes and deficiencies in the approach, and to detect emerging patterns in community organization. We review studies of the phylogenetic structure of communities of different major taxa and trophic levels, acro ...
Heathlands confronting global change: drivers of biodiversity loss
... water stress derived from low temperatures. Evergreen sclerophyllous shrubland communities also became adapted to the Mediterranean climate, which appeared on earth only approx. 3 Mya BP, characterized by the arid conditions of the warm season (Mariotti and Dell’Aguila, 2012). Typical heath componen ...
... water stress derived from low temperatures. Evergreen sclerophyllous shrubland communities also became adapted to the Mediterranean climate, which appeared on earth only approx. 3 Mya BP, characterized by the arid conditions of the warm season (Mariotti and Dell’Aguila, 2012). Typical heath componen ...
keeping options alive - World Resources Report
... definition of conservation, modelled after that used in the World Conservation Strategy (WCS) (IUCN 1980), emphasizes that how people use species, manage the land, and invest in development will determine the ultimate success of biodiversity conservation. To many, the word "conservation" has a narro ...
... definition of conservation, modelled after that used in the World Conservation Strategy (WCS) (IUCN 1980), emphasizes that how people use species, manage the land, and invest in development will determine the ultimate success of biodiversity conservation. To many, the word "conservation" has a narro ...
KILHAM, PETER, AND ROBERT E. HECKY. Comparative ecology of
... papers and reviews that deal with their ecology often restrict coverage to organisms from one habitat or the other. In this paper we will examine a variety of topics currently of interest to phytoplankton ecologists in order to determine similarities or differences between phytoplankton from each en ...
... papers and reviews that deal with their ecology often restrict coverage to organisms from one habitat or the other. In this paper we will examine a variety of topics currently of interest to phytoplankton ecologists in order to determine similarities or differences between phytoplankton from each en ...
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.