E4ects of Habitat Destruction and Resource
... the e!ect of habitat destruction on the dynamics of a prey and its specialist predator. They showed that predators were more sensitive to habitat fragmentation than were prey, and that extinction thresholds for predators were related to predator colonization rate. Although the results of Bascompte & ...
... the e!ect of habitat destruction on the dynamics of a prey and its specialist predator. They showed that predators were more sensitive to habitat fragmentation than were prey, and that extinction thresholds for predators were related to predator colonization rate. Although the results of Bascompte & ...
Adaptation, density dependence and the responses of trophic level
... matrix 2 in Table 2. This removes the three ‘zeroes’ present in matrix 1, which all stem from the assumption that predator population growth is independent of its own density. Given predator density dependence, an increase in the per capita death rate of a given species decreases its own equilibrium ...
... matrix 2 in Table 2. This removes the three ‘zeroes’ present in matrix 1, which all stem from the assumption that predator population growth is independent of its own density. Given predator density dependence, an increase in the per capita death rate of a given species decreases its own equilibrium ...
Ecology of the New Zealand Rocky Shore Community
... widely varying abiotic conditions from the low shore to the upper shore that prevent any single species from dominating the entire shore. Shallow, coastal seas surrounding New Zealand are very productive compared to the open ocean. Nutrients washed from the land and from the decay of seaweeds are pl ...
... widely varying abiotic conditions from the low shore to the upper shore that prevent any single species from dominating the entire shore. Shallow, coastal seas surrounding New Zealand are very productive compared to the open ocean. Nutrients washed from the land and from the decay of seaweeds are pl ...
The assembly and disassembly of ecological networks in a changing world
... forming complex networks of ecological interactions, has puzzled ecologists for many generations. It is one of the main unresolved mysteries of our world, one that could be paired with other important phenomena studied by the sciences such as what are the causes behind dynamical changes in weather p ...
... forming complex networks of ecological interactions, has puzzled ecologists for many generations. It is one of the main unresolved mysteries of our world, one that could be paired with other important phenomena studied by the sciences such as what are the causes behind dynamical changes in weather p ...
Assessment of Yellow Crazy Ants (Anoplolepis gracilipes) on
... queens are provided with the protection of the natal nest and there is a high likelihood that suitable nest sites will be found close to the original nest. Through this process, the invasion locus can expand and fuse to form a dense population and a continuous invasion front (Porter 1988) which is h ...
... queens are provided with the protection of the natal nest and there is a high likelihood that suitable nest sites will be found close to the original nest. Through this process, the invasion locus can expand and fuse to form a dense population and a continuous invasion front (Porter 1988) which is h ...
Loggerhead Shrike Prairie subspecies
... medium-sized songbird that is often seen perched on tall shrubs, telephone poles and fence posts around farmyards, shelterbelts and pastures with shrubs in prairie Canada. It impales its prey on thorns or barbed wire to tear the flesh apart with its hooked beak, and is often called the butcher bird. ...
... medium-sized songbird that is often seen perched on tall shrubs, telephone poles and fence posts around farmyards, shelterbelts and pastures with shrubs in prairie Canada. It impales its prey on thorns or barbed wire to tear the flesh apart with its hooked beak, and is often called the butcher bird. ...
APHIDS AND ANTS - underc - University of Notre Dame
... presence positively affected aphid abundance (Figure 5). DISCUSSION The results of this experiment support my hypothesis; ant presence does have a positive effect on aphid abundance on aspen trees. This was expected, as a number of other studies have shown similar results. It was interesting to find ...
... presence positively affected aphid abundance (Figure 5). DISCUSSION The results of this experiment support my hypothesis; ant presence does have a positive effect on aphid abundance on aspen trees. This was expected, as a number of other studies have shown similar results. It was interesting to find ...
Goliath grouper issues in Florida: fact or fiction. Christopher C
... experienced only a single harmless nip on goliath grouper density (no. per reef site) off southwest the hand by one individual that we had Florida on high-relief sites (R2 = 0.38; P<0.01). Dashed cornered under a ledge and were harassing ...
... experienced only a single harmless nip on goliath grouper density (no. per reef site) off southwest the hand by one individual that we had Florida on high-relief sites (R2 = 0.38; P<0.01). Dashed cornered under a ledge and were harassing ...
Waterfowl Habitat Conservation Strategy December 2007
... Venture (JV) region and to smaller scales within the region. We estimated what, where, when, and how much habitat is needed to sustain or increase populations of waterfowl species to target levels. Regional objectives also are “rolled up” in a manner that addresses the JV’s contribution to continent ...
... Venture (JV) region and to smaller scales within the region. We estimated what, where, when, and how much habitat is needed to sustain or increase populations of waterfowl species to target levels. Regional objectives also are “rolled up” in a manner that addresses the JV’s contribution to continent ...
Chapter 8 Arthropods: Harvestmen - Bryophyte Ecology
... An adaptation for living within the bryophyte community might be to have short legs that would enable them to enter the bryophyte domain without getting their legs tangled or caught. In fact, being smaller in all ways could help. For example, Siro carpathicus (Sironidae; see Figure 3) is one of the ...
... An adaptation for living within the bryophyte community might be to have short legs that would enable them to enter the bryophyte domain without getting their legs tangled or caught. In fact, being smaller in all ways could help. For example, Siro carpathicus (Sironidae; see Figure 3) is one of the ...
THE ECOLOGY, EVOLUTION, AND DIVERSIFICATION OF THE
... The concept of the ecological niche provides the foundation for understanding the distribution and abundance of organisms in their natural environments. Given its central importance in ecology and evolutionary biology, it is not surprising that the niche concept has been the source of a great deal o ...
... The concept of the ecological niche provides the foundation for understanding the distribution and abundance of organisms in their natural environments. Given its central importance in ecology and evolutionary biology, it is not surprising that the niche concept has been the source of a great deal o ...
Waterfowl Habitat Conservation Strategy
... Venture (JV) region and to smaller scales within the region. We estimated what, where, when, and how much habitat is needed to sustain or increase populations of waterfowl species to target levels. Regional objectives also are “rolled up” in a manner that addresses the JV’s contribution to continent ...
... Venture (JV) region and to smaller scales within the region. We estimated what, where, when, and how much habitat is needed to sustain or increase populations of waterfowl species to target levels. Regional objectives also are “rolled up” in a manner that addresses the JV’s contribution to continent ...
Inter- and intraspecific parasitism interactions
... Interspecific parasitism: definition Parasite (pathogen) = organism that obtains its nutrients from one or a very few host individuals, causing harm* but not causing host death immediately. Parasitoid = egg to larval organism that obtains its nutrients from a single host individual, causing host dea ...
... Interspecific parasitism: definition Parasite (pathogen) = organism that obtains its nutrients from one or a very few host individuals, causing harm* but not causing host death immediately. Parasitoid = egg to larval organism that obtains its nutrients from a single host individual, causing host dea ...
Inter- and intraspecific parasitism
... Interspecific parasitism: definition Parasite (pathogen) = organism that obtains its nutrients from one or a very few host individuals, causing harm* but not causing host death immediately. Parasitoid = egg to larval organism that obtains its nutrients from a single host individual, causing host dea ...
... Interspecific parasitism: definition Parasite (pathogen) = organism that obtains its nutrients from one or a very few host individuals, causing harm* but not causing host death immediately. Parasitoid = egg to larval organism that obtains its nutrients from a single host individual, causing host dea ...
science advice from the risk assessment of the invasive bloody red
... the Great Lakes in 2006, though anecdotal evidence suggests it may have been present since 2002. Since 2006, the species has been found in lakes Erie, Michigan and Ontario. It is believed to have been introduced through ballast water. From here, it threatens to expand its range to the remaining Grea ...
... the Great Lakes in 2006, though anecdotal evidence suggests it may have been present since 2002. Since 2006, the species has been found in lakes Erie, Michigan and Ontario. It is believed to have been introduced through ballast water. From here, it threatens to expand its range to the remaining Grea ...
Keystone Interactions: Salmon and Bear in Riparian
... survival of other native species or populations. Most descriptions of the keystone phenomenon focus on a single species, although it is understood that in many cases keystone effects arise through the interactions of two or more species. For example, studies of mutualism (for example, the ‘‘keystone ...
... survival of other native species or populations. Most descriptions of the keystone phenomenon focus on a single species, although it is understood that in many cases keystone effects arise through the interactions of two or more species. For example, studies of mutualism (for example, the ‘‘keystone ...
Trophic polymorphism in a terrestrial salamander John C. Maerz,
... where morphs are easily distinguished, and readily accept that those polymorphisms are adaptive (Skúlason and Smith, 1995; Smith and Skúlason, 1996). Less appreciated but potentially more common are cases of trophic polymorphism where phenotypes cannot easily be distinguished and show a continuous, ...
... where morphs are easily distinguished, and readily accept that those polymorphisms are adaptive (Skúlason and Smith, 1995; Smith and Skúlason, 1996). Less appreciated but potentially more common are cases of trophic polymorphism where phenotypes cannot easily be distinguished and show a continuous, ...
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 ...
Butterfly Insect Parasitoid Fauna
... lifetimes; and many parasites are often associated with multiple, often sequential, obligate hosts required for their life cycle (see also, Godfray, 1994). For the above reasons, we maintain that parasitoidism (the proper etymological term) is really a form of predation in the evolutionary, ecologic ...
... lifetimes; and many parasites are often associated with multiple, often sequential, obligate hosts required for their life cycle (see also, Godfray, 1994). For the above reasons, we maintain that parasitoidism (the proper etymological term) is really a form of predation in the evolutionary, ecologic ...
Monitoring data from citizen-science programs
... populations (Branch et al. 2002; Gage and Kosoy 2005; Wingard and Zahler 2006; Rodriguez 2009). The population dynamics and ecological roles of most burrowing mammal species remain poorly understood, however. The patterns discussed here apply to most, but not necessarily all, of the species mentione ...
... populations (Branch et al. 2002; Gage and Kosoy 2005; Wingard and Zahler 2006; Rodriguez 2009). The population dynamics and ecological roles of most burrowing mammal species remain poorly understood, however. The patterns discussed here apply to most, but not necessarily all, of the species mentione ...
Assessment of Northern Shrimp on the Eastern Scotian Shelf (SFAs
... by June, at which time fishing generally stops to avoid the moulting period. Fishing has generally resumed in September-October and may continue into December if catch rates and Shrimp condition are suitable. In recent years, fishing has been starting earlier in the calendar ...
... by June, at which time fishing generally stops to avoid the moulting period. Fishing has generally resumed in September-October and may continue into December if catch rates and Shrimp condition are suitable. In recent years, fishing has been starting earlier in the calendar ...
Parasites, density, and disturbance: Factors influencing coexistence
... could have significant repercussions on the community dynamics. A greater incidence of infection within the first years of reproductive capability could reduce the reproductive output of that species early in its life history. In addition, castration in younger size classes could increase mortality ...
... could have significant repercussions on the community dynamics. A greater incidence of infection within the first years of reproductive capability could reduce the reproductive output of that species early in its life history. In addition, castration in younger size classes could increase mortality ...
2005/062 - Vagues/Waves
... Winter skate (Leucoraja ocellata), also known as big or eyed skate, have only been reported in the Northwest Atlantic. Their range extends from the Gulf of St. Lawrence and the southern Newfoundland coast southward to Cape Hatteras. Within this range they have been reported from waters less than 1 m ...
... Winter skate (Leucoraja ocellata), also known as big or eyed skate, have only been reported in the Northwest Atlantic. Their range extends from the Gulf of St. Lawrence and the southern Newfoundland coast southward to Cape Hatteras. Within this range they have been reported from waters less than 1 m ...
Docket No. FWS–HQ–ES–2
... (ESA), requires that we identify species of wildlife and plants that are endangered or threatened based on the best available scientific and commercial information. As defined in section 3 of the ESA, an endangered species is any species that is in danger of extinction throughout all or a significan ...
... (ESA), requires that we identify species of wildlife and plants that are endangered or threatened based on the best available scientific and commercial information. As defined in section 3 of the ESA, an endangered species is any species that is in danger of extinction throughout all or a significan ...
04
... in the GIS and RPMF databases. The U. S. Army Garrison Hawaii first contracted botanical inventories of their training areas in 1977. In 1993, the Nature Conservancy ofHawaii was contracted to conduct additional surveys, the results of which were used in writing Ecosystem Management Plan Reports. Ke ...
... in the GIS and RPMF databases. The U. S. Army Garrison Hawaii first contracted botanical inventories of their training areas in 1977. In 1993, the Nature Conservancy ofHawaii was contracted to conduct additional surveys, the results of which were used in writing Ecosystem Management Plan Reports. Ke ...