stc_inf_7_10_summary_study_inv_alien_aq_weeds_0
... settlements consisting of permanent communities can be found in areas that can be utilised by pastoralists and agriculturalists. In addition, the human population in the Kafue Flats study area is increasing at an accelerated rate (overall, more than 3.2% per year). Over 60% of the 1.2 million adult ...
... settlements consisting of permanent communities can be found in areas that can be utilised by pastoralists and agriculturalists. In addition, the human population in the Kafue Flats study area is increasing at an accelerated rate (overall, more than 3.2% per year). Over 60% of the 1.2 million adult ...
6 Succession and Change in Ecosystems
... Changing an ecosystem sometimes results in unexpected environmental changes. For example, in order to produce more food, vast tracts of previously forested land have been cleared. The land is used to grow oats, barley, potatoes, beans, and other crops. One unexpected result of clearing this land has ...
... Changing an ecosystem sometimes results in unexpected environmental changes. For example, in order to produce more food, vast tracts of previously forested land have been cleared. The land is used to grow oats, barley, potatoes, beans, and other crops. One unexpected result of clearing this land has ...
3 The Role of Top Carnivores in
... the last million years have been, climatically, among the most turbulent of the last 500 million years, with major and often abrupt changes in mean temperature, rainfall, glaciation, sea level, and extent of sea ice (Pielou 1991). Notwithstanding the extraordinary dimatic instability of the recent p ...
... the last million years have been, climatically, among the most turbulent of the last 500 million years, with major and often abrupt changes in mean temperature, rainfall, glaciation, sea level, and extent of sea ice (Pielou 1991). Notwithstanding the extraordinary dimatic instability of the recent p ...
Using golf courses to bolster amphibian communities: University of
... other habitats that receive some chemical contamination. Yet, interestingly, over-wintered bullfrog tadpoles negatively affected survival to metamorphosis of amphibians whether on golf course or reference ponds. This result highlights the importance of creating environments that are less favorable t ...
... other habitats that receive some chemical contamination. Yet, interestingly, over-wintered bullfrog tadpoles negatively affected survival to metamorphosis of amphibians whether on golf course or reference ponds. This result highlights the importance of creating environments that are less favorable t ...
deflected succession
... number and proportion of longer-lived species. • Increased species diversity over time. Succession on Mt. St.Helens – another site of intense study. ...
... number and proportion of longer-lived species. • Increased species diversity over time. Succession on Mt. St.Helens – another site of intense study. ...
The magnitude of fungal diversity: the 1n5 million species estimate
... in the Dictionary of the Fungi (Hawksworth et al. 1995), however, Aptroot concluded that this gave strong support for the estimated 15 K accepted non-lichenized ascomycetes in that work. Aptroot went on to give a ‘ tentative estimation ’ of 20–40 K non-lichenized and 20–30 K lichenized ascomycetes w ...
... in the Dictionary of the Fungi (Hawksworth et al. 1995), however, Aptroot concluded that this gave strong support for the estimated 15 K accepted non-lichenized ascomycetes in that work. Aptroot went on to give a ‘ tentative estimation ’ of 20–40 K non-lichenized and 20–30 K lichenized ascomycetes w ...
Species Diversity of Browsing and Grazing Ungulates
... variation then forms the basis for a permanent association of species that enhance collective performance. In the selection effect, trait variation comes into play only as an initial condition, and a selection process then promotes dominance by species with extreme trait values’ (Loreau 2000; see al ...
... variation then forms the basis for a permanent association of species that enhance collective performance. In the selection effect, trait variation comes into play only as an initial condition, and a selection process then promotes dominance by species with extreme trait values’ (Loreau 2000; see al ...
here - Ammonia Workshop Edinburgh 2006
... • Tabulate the NH3 critical level values for different receptors (e.g. habitats and/or species) and for different time periods (e.g. daily, monthly, annual, long term (20-30 yrs) • List the main indicators of effects and source of evidence (e.g. laboratory, field transects, regional studies etc) and ...
... • Tabulate the NH3 critical level values for different receptors (e.g. habitats and/or species) and for different time periods (e.g. daily, monthly, annual, long term (20-30 yrs) • List the main indicators of effects and source of evidence (e.g. laboratory, field transects, regional studies etc) and ...
Alpine Arthropod Diversity
... from the Alps have shown that alpine carabids are “true open land dwellers” and prefer grasslands or dry stony soils with scattered plant cushions (Brandmayr et al., 2003). They tend to avoid shaded areas, such as those produced by trees and dwarf-shrubs. They also avoid habitats such as anthropogen ...
... from the Alps have shown that alpine carabids are “true open land dwellers” and prefer grasslands or dry stony soils with scattered plant cushions (Brandmayr et al., 2003). They tend to avoid shaded areas, such as those produced by trees and dwarf-shrubs. They also avoid habitats such as anthropogen ...
A newly identified population of Gambusia affinis (Baird and Girard
... aggression from G. affinis. The presence of predatory fish may, alongside food availability, limit the Gambusia population size (Hildebrand 1919). However the factors that regulate invasive Gambusia populations are complex and quantitative understanding of their population dynamics is poor (Pyke 200 ...
... aggression from G. affinis. The presence of predatory fish may, alongside food availability, limit the Gambusia population size (Hildebrand 1919). However the factors that regulate invasive Gambusia populations are complex and quantitative understanding of their population dynamics is poor (Pyke 200 ...
Towards a food web perspective on biodiversity and ecosystem
... trophic cascades, Strong (1992) argued that cascades are ‘a relatively unusual sort of food web mechanics . . . over the full range of ecological communities, evidence is that these cascades are restricted to fairly low-diversity places where great influence can issue from one or a few species’. He w ...
... trophic cascades, Strong (1992) argued that cascades are ‘a relatively unusual sort of food web mechanics . . . over the full range of ecological communities, evidence is that these cascades are restricted to fairly low-diversity places where great influence can issue from one or a few species’. He w ...
Current distribution of parthenium weed in Kenya and
... Associated species (Collect voucher material when possible) ...
... Associated species (Collect voucher material when possible) ...
An Analysis of Persistence, Resilience, and the Conservation of
... functioning ofan ecosystem. Consequently, in the rest ofthis paper, we abstract from the remaining (n -m) species and we focus on these m keystone species. The reader should note that all subsequent references to species are to these m keystone species. Economic activities such as fishing, grazing, ...
... functioning ofan ecosystem. Consequently, in the rest ofthis paper, we abstract from the remaining (n -m) species and we focus on these m keystone species. The reader should note that all subsequent references to species are to these m keystone species. Economic activities such as fishing, grazing, ...
section 7 - hartnell.edu
... these questions, we may need to know about enzyme chemistry and the genetic code, but we will also have to think about such matters as climate, soils, geologic history, animal predators and pollinators, interactions with microbial species, and the evolutionary history of the various species. It is t ...
... these questions, we may need to know about enzyme chemistry and the genetic code, but we will also have to think about such matters as climate, soils, geologic history, animal predators and pollinators, interactions with microbial species, and the evolutionary history of the various species. It is t ...
Cunningham et al
... McNeill, Alexander, R. 1999. Energy for Animal Life. Oxford Animal Biology Series. A comprehensive discussion of how animals obtain and use energy. Meffe, Gary K., et al. 2002. Ecosystem Management: Adaptive Community-Based Conservation. Island Press. An innovative textbook on applying the principle ...
... McNeill, Alexander, R. 1999. Energy for Animal Life. Oxford Animal Biology Series. A comprehensive discussion of how animals obtain and use energy. Meffe, Gary K., et al. 2002. Ecosystem Management: Adaptive Community-Based Conservation. Island Press. An innovative textbook on applying the principle ...
The magnitude of fungal diversity: the 1.5 million species estimate
... be reduced by 90 %. However, he accepted that as there were about 50 K ascomycete npmes, that reduction would imply 5 K species 'which is obviously far too low'. Comparing his results with the estimated species number for Didymosphaeria in the Dictionary of the Fungi (Hawksworth et al. 1995), howeve ...
... be reduced by 90 %. However, he accepted that as there were about 50 K ascomycete npmes, that reduction would imply 5 K species 'which is obviously far too low'. Comparing his results with the estimated species number for Didymosphaeria in the Dictionary of the Fungi (Hawksworth et al. 1995), howeve ...
Community Ecology_54
... in which an herbivore eats parts of a plant or alga It has led to evolution of plant mechanical and chemical defenses and adaptations by herbivores ...
... in which an herbivore eats parts of a plant or alga It has led to evolution of plant mechanical and chemical defenses and adaptations by herbivores ...
INTERIM RECOVERY PLAN NO - Department of Parks and Wildlife
... Current status: Dryandra fuscobractea was declared as Rare Flora under the Western Australian Wildlife Conservation Act 1950 in July 2004 and is currently ranked as Critically Endangered (CR) under World Conservation Union (IUCN 2001) Red List criteria C2a(i); D due to the species being in decline w ...
... Current status: Dryandra fuscobractea was declared as Rare Flora under the Western Australian Wildlife Conservation Act 1950 in July 2004 and is currently ranked as Critically Endangered (CR) under World Conservation Union (IUCN 2001) Red List criteria C2a(i); D due to the species being in decline w ...
The measure of order and disorder in the distribution of species in
... back to its initial conditions and rerun the extinction process repeatedly. In a perfectly "cold" system each species present in the assemblage would go extinct in turn as each species falls below its minimum sustainable population size, and that order would not change no matter how many times the e ...
... back to its initial conditions and rerun the extinction process repeatedly. In a perfectly "cold" system each species present in the assemblage would go extinct in turn as each species falls below its minimum sustainable population size, and that order would not change no matter how many times the e ...
Community monopolization: local adaptation enhances priority
... even though a good disperser arrives in many habitats, these immigrants will not always successfully establish and reproduce in those habitats. As such, even good dispersers can become locally adapted, a pattern long recognized but not often explained (Ehrlich & Raven 1969; Hendry & Taylor 2004). In ...
... even though a good disperser arrives in many habitats, these immigrants will not always successfully establish and reproduce in those habitats. As such, even good dispersers can become locally adapted, a pattern long recognized but not often explained (Ehrlich & Raven 1969; Hendry & Taylor 2004). In ...
13.1 Ecologists Study Relationships
... • Biodiversity is the assortment, or variety, of living things in an ecosystem. • Rain forests have more biodiversity than other locations in the world, but are threatened by human activities. ...
... • Biodiversity is the assortment, or variety, of living things in an ecosystem. • Rain forests have more biodiversity than other locations in the world, but are threatened by human activities. ...
Presentation: Rewilding
... affected. The wolves, even though they were few in number, radically changed the behaviour of the deer. The deer migrated away from the parts of the park where they could be trapped most easily, like the floodplain. Immediately, those places started to regenerate. In some areas, the height of the tr ...
... affected. The wolves, even though they were few in number, radically changed the behaviour of the deer. The deer migrated away from the parts of the park where they could be trapped most easily, like the floodplain. Immediately, those places started to regenerate. In some areas, the height of the tr ...
The Endangered Species Act of 1973
... are less than fully enforceable. NEPA directs that "it is the continuing responsibility of the Federal Government to use all practicable means, consistent with other essential considerations of national policy, "28 to improve plans and programs towards achieving the goal of environmental excellence. ...
... are less than fully enforceable. NEPA directs that "it is the continuing responsibility of the Federal Government to use all practicable means, consistent with other essential considerations of national policy, "28 to improve plans and programs towards achieving the goal of environmental excellence. ...
International Sage-grouse Forum (ISGF) (www.sage
... include establishment ecology of weeds and native plants, vegetation disturbance thresholds for management of sagebrush systems, watershed responses to management practices, and increasing diversity of fire rehabilitation and other range seedings. He will discuss understory cover responses to Piñon- ...
... include establishment ecology of weeds and native plants, vegetation disturbance thresholds for management of sagebrush systems, watershed responses to management practices, and increasing diversity of fire rehabilitation and other range seedings. He will discuss understory cover responses to Piñon- ...
Impact of farm size and topography on plant and
... Since the second half of the 20th century, the intensification of land-use practices and the associated decline in semi-natural habitats have been the major drivers of farmland biodiversity loss at local, regional and global scales (Norris, 2008). Over the same period, a structural transformation of ...
... Since the second half of the 20th century, the intensification of land-use practices and the associated decline in semi-natural habitats have been the major drivers of farmland biodiversity loss at local, regional and global scales (Norris, 2008). Over the same period, a structural transformation of ...
Biodiversity action plan
This article is about a conservation biology topic. For other uses of BAP, see BAP (disambiguation).A biodiversity action plan (BAP) is an internationally recognized program addressing threatened species and habitats and is designed to protect and restore biological systems. The original impetus for these plans derives from the 1992 Convention on Biological Diversity (CBD). As of 2009, 191 countries have ratified the CBD, but only a fraction of these have developed substantive BAP documents.The principal elements of a BAP typically include: (a) preparing inventories of biological information for selected species or habitats; (b) assessing the conservation status of species within specified ecosystems; (c) creation of targets for conservation and restoration; and (d) establishing budgets, timelines and institutional partnerships for implementing the BAP.