Predator interactions, mesopredator release and biodiversity
... There is growing recognition of the important roles played by predators in regulating ecosystems and sustaining biodiversity. Much attention has focused on the consequences of predator-regulation of herbivore populations, and associated trophic cascades. However apex predators may also control small ...
... There is growing recognition of the important roles played by predators in regulating ecosystems and sustaining biodiversity. Much attention has focused on the consequences of predator-regulation of herbivore populations, and associated trophic cascades. However apex predators may also control small ...
Predator interactions, mesopredator release and biodiversity
... There is growing recognition of the important roles played by predators in regulating ecosystems and sustaining biodiversity. Much attention has focused on the consequences of predator-regulation of herbivore populations, and associated trophic cascades. However apex predators may also control small ...
... There is growing recognition of the important roles played by predators in regulating ecosystems and sustaining biodiversity. Much attention has focused on the consequences of predator-regulation of herbivore populations, and associated trophic cascades. However apex predators may also control small ...
- Wiley Online Library
... For many of the mechanisms reviewed, groups of species are substitutable (sensu Sih, Englund & Wooster 1998) in their roles as modifiers: their effects may differ quantitatively a great deal, but are qualitatively redundant. Substitutability of modifiers that affect a species’ general foraging and ⁄ o ...
... For many of the mechanisms reviewed, groups of species are substitutable (sensu Sih, Englund & Wooster 1998) in their roles as modifiers: their effects may differ quantitatively a great deal, but are qualitatively redundant. Substitutability of modifiers that affect a species’ general foraging and ⁄ o ...
Considering ecological dynamics in resource selection functions
... factors underlying ecological dynamics acknowledge differences between individuals and ⁄ or groups. Two strategies currently stand out, although we acknowledge that this area of research is rapidly developing. The first, which relies on matched case–control designs for conditional logistic regression ...
... factors underlying ecological dynamics acknowledge differences between individuals and ⁄ or groups. Two strategies currently stand out, although we acknowledge that this area of research is rapidly developing. The first, which relies on matched case–control designs for conditional logistic regression ...
Considering ecological dynamics in resource selection functions
... factors underlying ecological dynamics acknowledge differences between individuals and ⁄ or groups. Two strategies currently stand out, although we acknowledge that this area of research is rapidly developing. The first, which relies on matched case–control designs for conditional logistic regression ...
... factors underlying ecological dynamics acknowledge differences between individuals and ⁄ or groups. Two strategies currently stand out, although we acknowledge that this area of research is rapidly developing. The first, which relies on matched case–control designs for conditional logistic regression ...
The Growth Responses of Fish to Differences in Acidity
... perch have plenty of food, and they can grow remarkably fast. Despite their good tolerance to acidity, pike suffer from lack of small fish, and they may grow slowly. However, if they find something to displace fish food, they are likely to grow normally at least during their early years of life. Whi ...
... perch have plenty of food, and they can grow remarkably fast. Despite their good tolerance to acidity, pike suffer from lack of small fish, and they may grow slowly. However, if they find something to displace fish food, they are likely to grow normally at least during their early years of life. Whi ...
Sound, chemical, and light detection in sea turtles and pelagic fishes
... practical fishing techniques that minimize bycatch without impacting target species catch rates. For example, Watson et al. (2005) found that the use of 18/0 circle hooks in a North Atlantic swordfish fishery significantly reduced both the number of sea turtle interactions and the incidence of hook ...
... practical fishing techniques that minimize bycatch without impacting target species catch rates. For example, Watson et al. (2005) found that the use of 18/0 circle hooks in a North Atlantic swordfish fishery significantly reduced both the number of sea turtle interactions and the incidence of hook ...
Oregon Attachment 3 Markup of Mainstem Amendments
... inadequate energy to meet the demands of the region. This forced many of the region’s utilities to curtail loads while also spending large sums to purchase power. For these reasons, the analysis of the adequacy, efficiency, economics and reliability of the region’s power supply that accompanies this ...
... inadequate energy to meet the demands of the region. This forced many of the region’s utilities to curtail loads while also spending large sums to purchase power. For these reasons, the analysis of the adequacy, efficiency, economics and reliability of the region’s power supply that accompanies this ...
Contribution of Greenland to the Danish Fourth National Report
... Consequenses of climate change includes more open coastal waters and following increased human activities such as increasing tourism and mineral exploitation, which all may contribute to increased threats towards biodiversity, habitats, and ecosystems. Monitoring and adaptative management responses ...
... Consequenses of climate change includes more open coastal waters and following increased human activities such as increasing tourism and mineral exploitation, which all may contribute to increased threats towards biodiversity, habitats, and ecosystems. Monitoring and adaptative management responses ...
Life in the Aftermath of Mass Extinctions
... The vast majority of species that have ever lived went extinct sometime other than during one of the great mass extinction events. In spite of this, mass extinctions are thought to have outsized effects on the evolutionary history of life. While part of this effect is certainly due to the extinction ...
... The vast majority of species that have ever lived went extinct sometime other than during one of the great mass extinction events. In spite of this, mass extinctions are thought to have outsized effects on the evolutionary history of life. While part of this effect is certainly due to the extinction ...
Greenpeace v. National Marine Fisheries Service
... competition between SSL and fisheries for prey; (2) climate shift; (3) predators, e.g., killer whales; (4) contaminants; (5) disease; (6) ...
... competition between SSL and fisheries for prey; (2) climate shift; (3) predators, e.g., killer whales; (4) contaminants; (5) disease; (6) ...
keeping options alive - World Resources Report
... Today, we are depleting the world's biological wealth at an ever-increasing rate, and the loss and degradation of the world's biological resources are taking a toll on the well-being of people in both industrialized and developing nations. The world entered the current era of geologic history with b ...
... Today, we are depleting the world's biological wealth at an ever-increasing rate, and the loss and degradation of the world's biological resources are taking a toll on the well-being of people in both industrialized and developing nations. The world entered the current era of geologic history with b ...
Biological structure of nearshore rocky subtidal habitats in southern
... Descriptions of the distribution and abundance patterns of organisms in subtidal communities play an important role in understanding the organisation of nearshore marine ecosystems. As more hard shore communities are described from different areas of the world, few general patterns of community stru ...
... Descriptions of the distribution and abundance patterns of organisms in subtidal communities play an important role in understanding the organisation of nearshore marine ecosystems. As more hard shore communities are described from different areas of the world, few general patterns of community stru ...
Grand Kankakee Marsh National Wildlife Refuge
... !s Preserve, restote, and enhance in their natural ecosystems (when practical) all species of animals and plants that are endangered or threatened with becoming endangered; !s Perpetuate the migratory bird resource; G Preserve a natural diversity and abundance of fauna and flora on refuge lands; and ...
... !s Preserve, restote, and enhance in their natural ecosystems (when practical) all species of animals and plants that are endangered or threatened with becoming endangered; !s Perpetuate the migratory bird resource; G Preserve a natural diversity and abundance of fauna and flora on refuge lands; and ...
Field Guide to Aquatic Invasive Species (3rd Edition)
... climates, it can act as an annual at colder latitudes, its seeds overwintering and germinating when temperatures warm2. Native Range: Australia and Pacific Islands, Africa, Asia, South and Central America, West Indies, Mexico and, according to some sources, the southeast United States (Florida, Loui ...
... climates, it can act as an annual at colder latitudes, its seeds overwintering and germinating when temperatures warm2. Native Range: Australia and Pacific Islands, Africa, Asia, South and Central America, West Indies, Mexico and, according to some sources, the southeast United States (Florida, Loui ...
'7 BAYDELTA FISH RESOURCES
... the degree to which they are affected by various factors. We know BayDelta fish resources have changed dramatically over the last few decades. Abundances of striped bass, naturally spawning salmon, Delta smelt, and some other species have been lower in recent years than they were 20 o r 30 years ago ...
... the degree to which they are affected by various factors. We know BayDelta fish resources have changed dramatically over the last few decades. Abundances of striped bass, naturally spawning salmon, Delta smelt, and some other species have been lower in recent years than they were 20 o r 30 years ago ...
Investigating a Competitive Two Species System that Produces
... concerning the feedback mechanism will follow in the methods section. The concept of ecosystem engineer can be put into an ecosystem development context as an ecosystem pioneer. The pioneer species colonizes bare land and modulates the local habitat through its ecosystem engineering ability. The inc ...
... concerning the feedback mechanism will follow in the methods section. The concept of ecosystem engineer can be put into an ecosystem development context as an ecosystem pioneer. The pioneer species colonizes bare land and modulates the local habitat through its ecosystem engineering ability. The inc ...
the fern understory as an ecological filter
... Abstract. We investigated the role of the fern understory of closed-canopy forests as an ecological filter shaping the density, species composition, size structure, and spatial distribution of the seedling bank. In New England deciduous forests we tested the hypothesis that the understory stratum is ...
... Abstract. We investigated the role of the fern understory of closed-canopy forests as an ecological filter shaping the density, species composition, size structure, and spatial distribution of the seedling bank. In New England deciduous forests we tested the hypothesis that the understory stratum is ...
Ecosystem of the Mangroves
... Besides for crucial for wildlife habitat both above and below the surface, mangroves also serve a purpose to the land beyond them. Mangroves are very efficient at counteracting erosion. In many areas around the world mangroves are removed for various reasons, and in these areas the effect of erosion ...
... Besides for crucial for wildlife habitat both above and below the surface, mangroves also serve a purpose to the land beyond them. Mangroves are very efficient at counteracting erosion. In many areas around the world mangroves are removed for various reasons, and in these areas the effect of erosion ...
Theoretical and empirical studies on population dynamics, species
... and death processes (BDP) (Gardiner 1985) to describe single species population dynamics. A BDP is given by two mathematical functions, the birth and the death rate of the species, which can be related to the probability of observing a given number of individuals of the species (Gardiner 1985). We i ...
... and death processes (BDP) (Gardiner 1985) to describe single species population dynamics. A BDP is given by two mathematical functions, the birth and the death rate of the species, which can be related to the probability of observing a given number of individuals of the species (Gardiner 1985). We i ...
Effects of invasive Pacific red lionfish Pterois volitans
... could have detrimental effects on native coral-reef communities in a variety of ways (Albins and Hixon 2011). First, if lionfish reduce the number of juveniles substantially, then they could have a negative effect on realized adult abundances of a wide range of species. Second, lionfish could have s ...
... could have detrimental effects on native coral-reef communities in a variety of ways (Albins and Hixon 2011). First, if lionfish reduce the number of juveniles substantially, then they could have a negative effect on realized adult abundances of a wide range of species. Second, lionfish could have s ...
Fire, Defoliation, and Competing Species Alter Aristida
... 1972; Horn and Redente 1998). Threeawn-dominated plant communities are a serious management concern for both livestock and wildlife because of low palatability and poor forage quality relative to many other native grass species (Meyer and Brown 1985). Major funding support was provided by the Bureau ...
... 1972; Horn and Redente 1998). Threeawn-dominated plant communities are a serious management concern for both livestock and wildlife because of low palatability and poor forage quality relative to many other native grass species (Meyer and Brown 1985). Major funding support was provided by the Bureau ...
Seasonal Change in Trophic Niche of Adfluvial Arctic Grayling
... populations is oftentimes a primary mission of conservation organizations [4]. However, effective management of non-native fish is difficult due to behavioral and trophic plasticity in open water systems [5,6,7]. Indeed, successful non-native invaders typically occupy a greater diversity of habitats ...
... populations is oftentimes a primary mission of conservation organizations [4]. However, effective management of non-native fish is difficult due to behavioral and trophic plasticity in open water systems [5,6,7]. Indeed, successful non-native invaders typically occupy a greater diversity of habitats ...
Overexploitation
Overexploitation, also called overharvesting, refers to harvesting a renewable resource to the point of diminishing returns. Sustained overexploitation can lead to the destruction of the resource. The term applies to natural resources such as: wild medicinal plants, grazing pastures, game animals, fish stocks, forests, and water aquifers.In ecology, overexploitation describes one of the five main activities threatening global biodiversity. Ecologists use the term to describe populations that are harvested at a rate that is unsustainable, given their natural rates of mortality and capacities for reproduction. This can result in extinction at the population level and even extinction of whole species. In conservation biology the term is usually used in the context of human economic activity that involves the taking of biological resources, or organisms, in larger numbers than their populations can withstand. The term is also used and defined somewhat differently in fisheries, hydrology and natural resource management.Overexploitation can lead to resource destruction, including extinctions. However it is also possible for overexploitation to be sustainable, as discussed below in the section on fisheries. In the context of fishing, the term overfishing can be used instead of overexploitation, as can overgrazing in stock management, overlogging in forest management, overdrafting in aquifer management, and endangered species in species monitoring. Overexploitation is not an activity limited to humans. Introduced predators and herbivores, for example, can overexploit native flora and fauna.