Growth potential and predation risk drive ontogenetic shifts among
... rate), or reduction of the ratio of mortality to growth are all variable in both space and time (Lima & Dill 1990, Dahlgren & Eggleston 2000, Haywood & Kenyon 2009). Tropical coastlines contain ubiquitous examples of complex seascapes. In shallow, clear water they often harbor mangrove, seagrass, ma ...
... rate), or reduction of the ratio of mortality to growth are all variable in both space and time (Lima & Dill 1990, Dahlgren & Eggleston 2000, Haywood & Kenyon 2009). Tropical coastlines contain ubiquitous examples of complex seascapes. In shallow, clear water they often harbor mangrove, seagrass, ma ...
NORTHERN HARRIER Circus cyaneus
... moderately grazed grasslands (Bock et al. 1993; Kantrud and Kologiski 1983). Livestock can also directly affect nest success by trampling nest sites. The effects of chemical and mechanical sagebrush treatment to improve range conditions for cattle are unknown, but are likely low, especially where gr ...
... moderately grazed grasslands (Bock et al. 1993; Kantrud and Kologiski 1983). Livestock can also directly affect nest success by trampling nest sites. The effects of chemical and mechanical sagebrush treatment to improve range conditions for cattle are unknown, but are likely low, especially where gr ...
fluence benthic community assemblages in seagrass Examining how landscapes in
... fish and crustaceans because the beds provide refuge from their predators. Also, since the nursery function of seagrass beds is influenced by their location within the estuary, we hypothesized that seagrass beds near shore have higher fish and crustacean abundances because their predator populations in ...
... fish and crustaceans because the beds provide refuge from their predators. Also, since the nursery function of seagrass beds is influenced by their location within the estuary, we hypothesized that seagrass beds near shore have higher fish and crustacean abundances because their predator populations in ...
Life on the edge: diet preferences reflect adaptation to
... Mediterranean ecosystems. Although woodrats are not endangered and are currently classified as “least concern” by IUCN, population declines have been occurring in the species since the early 2000s (McEachern et al. 2007), which may be linked to climate change and increasing drought conditions in Cal ...
... Mediterranean ecosystems. Although woodrats are not endangered and are currently classified as “least concern” by IUCN, population declines have been occurring in the species since the early 2000s (McEachern et al. 2007), which may be linked to climate change and increasing drought conditions in Cal ...
Tidal marsh song sparrows - Baylands Ecosystem Habitat Goals
... Impacts of climate change on survival of first-year birds and adults is not known. Small changes in survival rates can have substantial consequences for population growth (or decline) and population resilience. Therefore an important gap to address is information on environmental influences on survi ...
... Impacts of climate change on survival of first-year birds and adults is not known. Small changes in survival rates can have substantial consequences for population growth (or decline) and population resilience. Therefore an important gap to address is information on environmental influences on survi ...
Western Pond Turtle (Clemmys marmorata)
... some mammals. Competitive interactions with other species have not been reported (Zeiner 1988). ...
... some mammals. Competitive interactions with other species have not been reported (Zeiner 1988). ...
Cover: Its Importance to Wyoming`s Wildlife
... openings in a coniferous forest, for example, provides a sunny area for wildlife to obtain food sources while remaining close to protective cover. A combination of different cover-type patches allows wildlife to meet all their needs without traveling far. Improving horizontal diversity or patchiness ...
... openings in a coniferous forest, for example, provides a sunny area for wildlife to obtain food sources while remaining close to protective cover. A combination of different cover-type patches allows wildlife to meet all their needs without traveling far. Improving horizontal diversity or patchiness ...
Habitat Selection by Two Competing Species in a Two
... Let N1 and N2 be the population densities in habitats 1 and 2, respectively, and n and 1 ⫺ n be the respective proportions of animals in habitat 1 and 2. Then N1 p nN and N2 p (1 ⫺ n)N, where N denotes the overall population density. Note that n reflects the preference of an average animal for habit ...
... Let N1 and N2 be the population densities in habitats 1 and 2, respectively, and n and 1 ⫺ n be the respective proportions of animals in habitat 1 and 2. Then N1 p nN and N2 p (1 ⫺ n)N, where N denotes the overall population density. Note that n reflects the preference of an average animal for habit ...
Spatial variation and effects of habitat on temperate reef fish
... on spatial distributions of populations, both in tropical coral reefs (Roberts and Ormond, 1987; Tolimieri, 1995; Caley and St. John, 1996; Friedlander and Parrish, 1998; Tolimieri, 1998a; Holbrook et al., 2000; McClanahan and Arthur, 2001) and in temperate rocky reef systems (Choat and Ayling, 1987 ...
... on spatial distributions of populations, both in tropical coral reefs (Roberts and Ormond, 1987; Tolimieri, 1995; Caley and St. John, 1996; Friedlander and Parrish, 1998; Tolimieri, 1998a; Holbrook et al., 2000; McClanahan and Arthur, 2001) and in temperate rocky reef systems (Choat and Ayling, 1987 ...
Tipton Kangaroo Rat - Bakersfield Habitat Conservation Plan
... hectare overall and 13.5 ± 4.4 animals per hectare in focus areas. A study at the Highway 41 and Jackson Avenue site near Naval Air Station Lemoore calculated densities for the year 2002 of 11.7 Tipton kangaroo rats per hectare, 14.5 per hectare for 2003, and 13.4 per hectare for 2004. These results ...
... hectare overall and 13.5 ± 4.4 animals per hectare in focus areas. A study at the Highway 41 and Jackson Avenue site near Naval Air Station Lemoore calculated densities for the year 2002 of 11.7 Tipton kangaroo rats per hectare, 14.5 per hectare for 2003, and 13.4 per hectare for 2004. These results ...
Large, natural blocks of mature woodland habitat within
... exceptions criteria for ecoregional SWH which will be identified at an ecodistrict scaleccxvi. Exceptions occur when criteria for a specific habitat are different within an ecodistrict compared to the remainder of an ecoregion or if a habitat only occurs within a restricted area of the ecoregion. Th ...
... exceptions criteria for ecoregional SWH which will be identified at an ecodistrict scaleccxvi. Exceptions occur when criteria for a specific habitat are different within an ecodistrict compared to the remainder of an ecoregion or if a habitat only occurs within a restricted area of the ecoregion. Th ...
Lowland Woodland Fauna - Environment, Planning and Sustainable
... birds. Habitat quality is at least as important as woodland patch size in maintaining bird species richness for patches larger than 6 ha (Barrett et al. (1994). In a study in the Boorowa area, NSW (north of the ACT), Freudenberger (2001) found few ‘declining’ woodland birds in simplified habitats th ...
... birds. Habitat quality is at least as important as woodland patch size in maintaining bird species richness for patches larger than 6 ha (Barrett et al. (1994). In a study in the Boorowa area, NSW (north of the ACT), Freudenberger (2001) found few ‘declining’ woodland birds in simplified habitats th ...
Full-Text PDF
... to S. idalia is loss of its prairie habitat to development and agriculture, and the principal conservation need is to protect and manage its remaining prairie habitat [22]. In addition to development or conversion of grasslands to agriculture, the remaining prairie has been exposed to pesticides and ...
... to S. idalia is loss of its prairie habitat to development and agriculture, and the principal conservation need is to protect and manage its remaining prairie habitat [22]. In addition to development or conversion of grasslands to agriculture, the remaining prairie has been exposed to pesticides and ...
important considerations for the management of demersal fisheries
... salinities that are typical of near-shore conditions whereas high density stations of lemon sole were distinguished by greater depths, higher salinities and lower temperatures. In terms of sediment preferences, plaice appeared to prefer sediments with a high sand content and only small quantities of ...
... salinities that are typical of near-shore conditions whereas high density stations of lemon sole were distinguished by greater depths, higher salinities and lower temperatures. In terms of sediment preferences, plaice appeared to prefer sediments with a high sand content and only small quantities of ...
Not seeing the ocean for the islands
... along the new edge vary, but some species are unable to survive in the newly created conditions. For these species, the amount of habitat lost to fragmentation is greater than that simply converted. Invasions by exotic species may also be enhanced by habitat destruction (Medley, 1997), as many invas ...
... along the new edge vary, but some species are unable to survive in the newly created conditions. For these species, the amount of habitat lost to fragmentation is greater than that simply converted. Invasions by exotic species may also be enhanced by habitat destruction (Medley, 1997), as many invas ...
Living in a landscape of fear: the impact of predation, resource
... required that exclusively reflect perceived predation risk and distinguish between predator-specific predation risks in determining prey behaviour. In a novel approach, Willems and Hill (2009) showed that predator-specific landscapes of fear could be constructed on the basis of vervet monkey, Chloroceb ...
... required that exclusively reflect perceived predation risk and distinguish between predator-specific predation risks in determining prey behaviour. In a novel approach, Willems and Hill (2009) showed that predator-specific landscapes of fear could be constructed on the basis of vervet monkey, Chloroceb ...
Ecosystem engineering and biodiversity in coastal sediments
... the engineering community by removing autogenic ecosystem engineers through coastal engineering or bottom trawling. Another source of anthropogenic inXuences comes from introducing invasive engineers, from which the impact is often hard to predict. We hypothesise that the local biodiversity eVects o ...
... the engineering community by removing autogenic ecosystem engineers through coastal engineering or bottom trawling. Another source of anthropogenic inXuences comes from introducing invasive engineers, from which the impact is often hard to predict. We hypothesise that the local biodiversity eVects o ...
Managing open habitats in upland forests
... when designing new forests, restructuring existing forests or revising forest management plans. Rocky habitats (Figure 4d) include cliffs and crags, scree patches and boulder fields, ravines, gorges, streamside gravel deposits, and man-made road cuttings and quarries. In some situations they are val ...
... when designing new forests, restructuring existing forests or revising forest management plans. Rocky habitats (Figure 4d) include cliffs and crags, scree patches and boulder fields, ravines, gorges, streamside gravel deposits, and man-made road cuttings and quarries. In some situations they are val ...
Components of breeding performance in two competing species
... Newton 1998, Pä rt 2001, Kokko et al. 2004), most studies concentrate just on one of these topics, i.e. habitat or individual quality, or the available data do not allow the proper separation of their relative importance in the studied populations. The concept of individual quality was mainly propo ...
... Newton 1998, Pä rt 2001, Kokko et al. 2004), most studies concentrate just on one of these topics, i.e. habitat or individual quality, or the available data do not allow the proper separation of their relative importance in the studied populations. The concept of individual quality was mainly propo ...
Confounding factors in the detection of species responses to habitat
... We show that confounding factors can mask many fragmentation effects. For instance, there are multiple ways in which species traits like trophic level, dispersal ability and degree of habitat specialisation influence specieslevel responses. The temporal scale of investigation may have a strong influenc ...
... We show that confounding factors can mask many fragmentation effects. For instance, there are multiple ways in which species traits like trophic level, dispersal ability and degree of habitat specialisation influence specieslevel responses. The temporal scale of investigation may have a strong influenc ...
APPENDIX B-2A Duchess Paradise Project
... Marine/estuarine species that spends its first three–four years in freshwater growing to about half its adult size (4 m+). In northern Australia, this species appears to be confined to freshwater drainages and the upper reaches of estuaries, occasionally being found as far as 400 km from the sea ...
... Marine/estuarine species that spends its first three–four years in freshwater growing to about half its adult size (4 m+). In northern Australia, this species appears to be confined to freshwater drainages and the upper reaches of estuaries, occasionally being found as far as 400 km from the sea ...
Gray Ratsnake (Elaphe spiloides) - Registre public des espèces en
... A species, subspecies, variety, or geographically or genetically distinct population of animal, plant or other organism, other than a bacterium or virus, that is wild by nature and is either native to Canada or has extended its range into Canada without human intervention and has been present in Can ...
... A species, subspecies, variety, or geographically or genetically distinct population of animal, plant or other organism, other than a bacterium or virus, that is wild by nature and is either native to Canada or has extended its range into Canada without human intervention and has been present in Can ...
11 Sexual segregation in ungulates: from individual
... (social classes) can differ in the degree of social attraction to the opposite sex, move at a velocity or/and have activity rhythms that impair association for long periods of time (see also Chapter 10). Social attraction can rely on the activity of animals but also on the capacity to discriminate t ...
... (social classes) can differ in the degree of social attraction to the opposite sex, move at a velocity or/and have activity rhythms that impair association for long periods of time (see also Chapter 10). Social attraction can rely on the activity of animals but also on the capacity to discriminate t ...
Changes in community structure in temperate marine reserves
... urchin Evechinus chloroticus had declined from 4.9 to 1.4 m-2 since 1978 in areas formerly dominated by it. Consequently, kelp forests were more extensive in 1998 than they were at the time of reserve creation. Urchin-dominated barrens occupied only 14 % of available reef substratum in reserves as o ...
... urchin Evechinus chloroticus had declined from 4.9 to 1.4 m-2 since 1978 in areas formerly dominated by it. Consequently, kelp forests were more extensive in 1998 than they were at the time of reserve creation. Urchin-dominated barrens occupied only 14 % of available reef substratum in reserves as o ...
Non Game Bird Management Plan for Neithercut Woodland By Brad
... woodland. If a breeding pair is found, find the nest and begin monitoring the success rate. -Plant 10% of the Sugar Maples in the clearings. -If Red Shouldered Hawks are not present, immediately start a reintroduction program. -Document important habitat areas based on vegetation composition -Begin ...
... woodland. If a breeding pair is found, find the nest and begin monitoring the success rate. -Plant 10% of the Sugar Maples in the clearings. -If Red Shouldered Hawks are not present, immediately start a reintroduction program. -Document important habitat areas based on vegetation composition -Begin ...
Habitat destruction
Habitat destruction is the process in which natural habitat is rendered functionally unable to support the species present. In this process, the organisms that previously used the site are displaced or destroyed, reducing biodiversity. Habitat destruction by human activity is mainly for the purpose of harvesting natural resources for industry production and urbanization. Clearing habitats for agriculture is the principal cause of habitat destruction. Other important causes of habitat destruction include mining, logging, trawling and urban sprawl. Habitat destruction is currently ranked as the primary cause of species extinction worldwide. It is a process of natural environmental change that may be caused by habitat fragmentation, geological processes, climate change or by human activities such as the introduction of invasive species, ecosystem nutrient depletion, and other human activities mentioned below.The terms habitat loss and habitat reduction are also used in a wider sense, including loss of habitat from other factors, such as water and noise pollution.