Sand Hill Arthropods in Canadian Grasslands
... to the wind (Acorn 2001). Sandbars along river courses support many species of sandassociated arthropods, but these habitats are usually seasonal and allow colonization only during late summer when water levels are low. Non-human Disturbance Disturbance is defined here as that which exposes open san ...
... to the wind (Acorn 2001). Sandbars along river courses support many species of sandassociated arthropods, but these habitats are usually seasonal and allow colonization only during late summer when water levels are low. Non-human Disturbance Disturbance is defined here as that which exposes open san ...
CERL TR EN-94/09, The Mohave Ground Squirrel at Fort Irwin
... Army's National Training Center (NTC) to monitor woody perennial vegetation and vertebrate populations. Data from that program and ongoing research and development by the author have developed analytical capabilities to quantitatively assess the effects of military training activities on ecological ...
... Army's National Training Center (NTC) to monitor woody perennial vegetation and vertebrate populations. Data from that program and ongoing research and development by the author have developed analytical capabilities to quantitatively assess the effects of military training activities on ecological ...
Ch 6 Humans in the Biosphere power points
... A species whose population size is declining in a way that places it in danger of extinction is called an endangered species. As the population of an endangered species declines, the species loses genetic diversity. ...
... A species whose population size is declining in a way that places it in danger of extinction is called an endangered species. As the population of an endangered species declines, the species loses genetic diversity. ...
Chapter 11: Livestock Production
... Livestock production is increasing throughout the developing world, although more slowly in sub-Saharan Africa than in most other regions. This increase is driven by growing population, increasing urbanization and rising incomes. This situation is expected to continue throughout the next decade. A s ...
... Livestock production is increasing throughout the developing world, although more slowly in sub-Saharan Africa than in most other regions. This increase is driven by growing population, increasing urbanization and rising incomes. This situation is expected to continue throughout the next decade. A s ...
Effect of aquaculture on world fish supplies
... feed and adopt more ecologically sound management practices. The worldwide decline of ocean ®sheries stocks has provided impetus for rapid growth in ®sh and shell®sh farming, or aquaculture. Between 1987 and 1997, global production of farmed ®sh and shell®sh (collectively called `®sh') more than dou ...
... feed and adopt more ecologically sound management practices. The worldwide decline of ocean ®sheries stocks has provided impetus for rapid growth in ®sh and shell®sh farming, or aquaculture. Between 1987 and 1997, global production of farmed ®sh and shell®sh (collectively called `®sh') more than dou ...
Effect of aquaculture on world fish supplies
... feed and adopt more ecologically sound management practices. The worldwide decline of ocean ®sheries stocks has provided impetus for rapid growth in ®sh and shell®sh farming, or aquaculture. Between 1987 and 1997, global production of farmed ®sh and shell®sh (collectively called `®sh') more than dou ...
... feed and adopt more ecologically sound management practices. The worldwide decline of ocean ®sheries stocks has provided impetus for rapid growth in ®sh and shell®sh farming, or aquaculture. Between 1987 and 1997, global production of farmed ®sh and shell®sh (collectively called `®sh') more than dou ...
Mudskipper: A biological indicator for environmental monitoring and
... Mudskippers (Teleostei: Gobiidae: Oxudercinae: Periophthalmini) are gobies that are “fully terrestrial for some portion of the daily cycle” [1]. They are investigated for their biological and eco-toxicological studies, to determine its potential use as a bio-indicator in environmental assessments of ...
... Mudskippers (Teleostei: Gobiidae: Oxudercinae: Periophthalmini) are gobies that are “fully terrestrial for some portion of the daily cycle” [1]. They are investigated for their biological and eco-toxicological studies, to determine its potential use as a bio-indicator in environmental assessments of ...
Steep Holm Island, Bristol Channel, UK: evidence of Larus fuscus
... examination of comparative material from a pond in South Wales (Figure 5). They are ...
... examination of comparative material from a pond in South Wales (Figure 5). They are ...
Macquarie Marshes Ramsar site: Ecological character description
... colour profiles dry out, they can develop deep cracks that allow water and some litter and other organic material to enter the soil. Cracking mostly occurs in areas of the floodplain away from the main channels, where inundation is the most variable. This leads to gilgai topography, the natural low ...
... colour profiles dry out, they can develop deep cracks that allow water and some litter and other organic material to enter the soil. Cracking mostly occurs in areas of the floodplain away from the main channels, where inundation is the most variable. This leads to gilgai topography, the natural low ...
Connections between species diversity and genetic diversity
... and therefore genetic diversity for neutral traits as well. At the most basic level, selection favours some individuals over others and these individuals may represent different species or different genetic variants within species. There are far too many selection-based theories of diversity in comm ...
... and therefore genetic diversity for neutral traits as well. At the most basic level, selection favours some individuals over others and these individuals may represent different species or different genetic variants within species. There are far too many selection-based theories of diversity in comm ...
Doc Ornis 14-04/08 – Annex I
... works carried out to reach each result and of the relevance/need of actions. In order to reduce as possible such element of subjectivity, and to make sure the same criteria were used in determining the IS, after receiving filled in forms from individual respondents, all answers were checked and, if ...
... works carried out to reach each result and of the relevance/need of actions. In order to reduce as possible such element of subjectivity, and to make sure the same criteria were used in determining the IS, after receiving filled in forms from individual respondents, all answers were checked and, if ...
Seaside Centipede Lichen (Heterodermia sitchensis)
... (sexual fruiting structures) in urn-shaped outgrowths near the lobe tips. These have prominent flaring rims that in turn bear ring-shaped soredia (powdery asexual reproductive propagules) on their inner surface. Among the chemical substances present in H. sitchensis are atranorin, zeorin, and variou ...
... (sexual fruiting structures) in urn-shaped outgrowths near the lobe tips. These have prominent flaring rims that in turn bear ring-shaped soredia (powdery asexual reproductive propagules) on their inner surface. Among the chemical substances present in H. sitchensis are atranorin, zeorin, and variou ...
Nine-spotted Lady Beetle (Coccinella novemnotata
... lady beetles are very mobile, display low site fidelity, and readily engage in short- and longdistance dispersal. Drivers of dispersal are a combination of prey density and environmental variables such as temperature, wind speed and rainfall. This species does not migrate. Both adult and larval stag ...
... lady beetles are very mobile, display low site fidelity, and readily engage in short- and longdistance dispersal. Drivers of dispersal are a combination of prey density and environmental variables such as temperature, wind speed and rainfall. This species does not migrate. Both adult and larval stag ...
The Texas horned lizard (Phrynosoma cornutum) belongs to a
... within a few weeks, and no self-sustaining captive-bred populations were ever developed. Horned lizards now are protected in Oklahoma and Texas and this activity is illegal; however, where collecting was common, some populations may not have recovered yet. As native habitats are modified by human de ...
... within a few weeks, and no self-sustaining captive-bred populations were ever developed. Horned lizards now are protected in Oklahoma and Texas and this activity is illegal; however, where collecting was common, some populations may not have recovered yet. As native habitats are modified by human de ...
FINANCING PLAN (IN US$):
... ecologically fragile wildlife/livestock area that needs well planned land use to ensure its sustainability and avoid environmental degradation. Thus, there is significant government commitment at both national and local level to maintain the natural savannah ecosystem in this area. Finally, the Kite ...
... ecologically fragile wildlife/livestock area that needs well planned land use to ensure its sustainability and avoid environmental degradation. Thus, there is significant government commitment at both national and local level to maintain the natural savannah ecosystem in this area. Finally, the Kite ...
6.4 Environmental Niche Analysis - Predicting potential occurrence
... incorporated into the prior analysis, the results presented here were expected to confirm the current national distribution, and contribute to the local population management in the action planning stage. For example, refined and validated niche models could inform management on priority areas for h ...
... incorporated into the prior analysis, the results presented here were expected to confirm the current national distribution, and contribute to the local population management in the action planning stage. For example, refined and validated niche models could inform management on priority areas for h ...
The Practices of Wolf Persecution, Protection, and
... spectrum of approaches in Canada and the United States. During the early 20th century, wolves were considered undesirable. They were subject to persecution and were extirpated from large areas of their original range. With increased environmental awareness in the 1970s, attitudes toward wolves began ...
... spectrum of approaches in Canada and the United States. During the early 20th century, wolves were considered undesirable. They were subject to persecution and were extirpated from large areas of their original range. With increased environmental awareness in the 1970s, attitudes toward wolves began ...
Global Invasive Species Database
... Ants are notorious invaders, particularly those species known as “tramp” ants. They easily disperse worldwide through commerce and other human-assisted avenues, often cause significant economic and environmental damage, and are often extremely difficult or impossible to eradicate or control. Althoug ...
... Ants are notorious invaders, particularly those species known as “tramp” ants. They easily disperse worldwide through commerce and other human-assisted avenues, often cause significant economic and environmental damage, and are often extremely difficult or impossible to eradicate or control. Althoug ...
Marine Ecology Progress Series 273:251
... Rosenzweig 1995, Currie et al. 1999) as well as the bibliography of the papers detected. From a total of more than 1000 studies checked, 232 studies conformed to the following selection criteria: (1) the number of observations had to be 3 or more; (2) the range of latitudes covered had to be at leas ...
... Rosenzweig 1995, Currie et al. 1999) as well as the bibliography of the papers detected. From a total of more than 1000 studies checked, 232 studies conformed to the following selection criteria: (1) the number of observations had to be 3 or more; (2) the range of latitudes covered had to be at leas ...
Biology of Mayflies - Ephemeroptera Galactica
... wall expressed by a powerfunction wherethe value of b is close to 3 (108, ...
... wall expressed by a powerfunction wherethe value of b is close to 3 (108, ...
Landscape Patterns Environmental Quality Analysis
... The diversity of local conditions and the range of ecosystem components and associated indicators can be overwhelming, making clear assessments of environmental indicators challenging. Due to budget, time, and logistical constraints, it is virtually impossible to monitor all ecosystem components com ...
... The diversity of local conditions and the range of ecosystem components and associated indicators can be overwhelming, making clear assessments of environmental indicators challenging. Due to budget, time, and logistical constraints, it is virtually impossible to monitor all ecosystem components com ...
consumer species richness and autotrophic biomass
... Sterner et al. 1997). Autotrophic biomass is the cumulative product of such population-based processes. In contrast to the systems perspective, this population perspective sees such an enormous variety of possible responses to variation in consumer diversity that there is no way to generally predict ...
... Sterner et al. 1997). Autotrophic biomass is the cumulative product of such population-based processes. In contrast to the systems perspective, this population perspective sees such an enormous variety of possible responses to variation in consumer diversity that there is no way to generally predict ...
white-tailed deer - managed species
... during the breeding season. Males begin rutting as early as September, and at this time they become entirely preoccupied with locating does for mating. They do not guard harems, as with elk, rather they mark and defend a geographical territory, and challenge other males for opportunities to mate wit ...
... during the breeding season. Males begin rutting as early as September, and at this time they become entirely preoccupied with locating does for mating. They do not guard harems, as with elk, rather they mark and defend a geographical territory, and challenge other males for opportunities to mate wit ...
Untitled - Université de Sherbrooke
... one of the most far reaching uses of wildlife. It is believed to involve more people and to have a greater effect on wild animal populations than any other form of use. The objectives of this paper were to determine 1) what subsistence hunting constitutes; 2) whether or not this type of activity has ...
... one of the most far reaching uses of wildlife. It is believed to involve more people and to have a greater effect on wild animal populations than any other form of use. The objectives of this paper were to determine 1) what subsistence hunting constitutes; 2) whether or not this type of activity has ...
Ecosystem effects of fishing in kelp forest communities
... extremes were uncommon. Storms, interannual variability in ocean climate, other physical factors affecting recruitment and growth of kelp, as well as other seaurchin predators, and echinoid recruitment events and diseases are also important to community structure in California (e.g., Dayton, 1985a; E ...
... extremes were uncommon. Storms, interannual variability in ocean climate, other physical factors affecting recruitment and growth of kelp, as well as other seaurchin predators, and echinoid recruitment events and diseases are also important to community structure in California (e.g., Dayton, 1985a; E ...
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.