Impacts of carp in Australia
... caused the habitat degradation in the first place. What they will do is make it more difficult to restore these systems to a healthy condition. Many of the claims regarding carp’s environmental effects are difficult to confirm because of the lack of information on waterway health before their introd ...
... caused the habitat degradation in the first place. What they will do is make it more difficult to restore these systems to a healthy condition. Many of the claims regarding carp’s environmental effects are difficult to confirm because of the lack of information on waterway health before their introd ...
The influence of connectivity on richness and temporal variation of
... natural continuous reef by: (1) varying the distance between ARs and the continuous reef, and (2) adding a series of small ARs to half the ARs. These small ARs serve as stepping-stones (sensu MacArthur and Wilson 1967) for fish movement and are designed to increase post-settlement relocation between ...
... natural continuous reef by: (1) varying the distance between ARs and the continuous reef, and (2) adding a series of small ARs to half the ARs. These small ARs serve as stepping-stones (sensu MacArthur and Wilson 1967) for fish movement and are designed to increase post-settlement relocation between ...
Biodiversity Loss Threatens Human Well-Being
... not hopeless. We know from recent assessments [1,2,7,8] that global biodiversity loss is not occurring at random. As a consequence of global change drivers, such as climate, biological invasions, and especially land use, not only is the total number of species on the planet decreasing, but there are ...
... not hopeless. We know from recent assessments [1,2,7,8] that global biodiversity loss is not occurring at random. As a consequence of global change drivers, such as climate, biological invasions, and especially land use, not only is the total number of species on the planet decreasing, but there are ...
Food webs in space: On the interplay of dynamic instability and
... One of the core ideas of island biogeographic theory is that area can influence community structure via colonization and extinction. All else being equal, a species is more likely to be found on a large island, than a small island, because the large island provides a larger target for colonization a ...
... One of the core ideas of island biogeographic theory is that area can influence community structure via colonization and extinction. All else being equal, a species is more likely to be found on a large island, than a small island, because the large island provides a larger target for colonization a ...
From Populations to the Biosphere
... Other limiting factors include light, water, nutrients or minerals, oxygen, the ability of an ecosystem to recycle nutrients and/or waste, disease and/or parasites, temperature, space, and predation. Can you think of some other factors that limit populations? Weather is also a limiting factor. For e ...
... Other limiting factors include light, water, nutrients or minerals, oxygen, the ability of an ecosystem to recycle nutrients and/or waste, disease and/or parasites, temperature, space, and predation. Can you think of some other factors that limit populations? Weather is also a limiting factor. For e ...
Flexible filter feeders van Walraven, Lodewijk
... Ctenophora are the second oldest known multicellular animals to diverge, after Porifera. The alternative hypothesis that Ctenophora are the oldest known multicellular animals to diverge (Ryan et al., 2013), which would imply several independent gains and losses of key metazoan characteristics, is cu ...
... Ctenophora are the second oldest known multicellular animals to diverge, after Porifera. The alternative hypothesis that Ctenophora are the oldest known multicellular animals to diverge (Ryan et al., 2013), which would imply several independent gains and losses of key metazoan characteristics, is cu ...
Primary consumers
... • Ecologists believe that we are pushing species toward extinction at an alarming rate. • The present rate of species loss – May be 1,000 times higher than at any time in the past 100,000 years – May result in the loss of half of all living plant and animal species by the end of this century ...
... • Ecologists believe that we are pushing species toward extinction at an alarming rate. • The present rate of species loss – May be 1,000 times higher than at any time in the past 100,000 years – May result in the loss of half of all living plant and animal species by the end of this century ...
Notes and Comments
... that several of these more stringent definitions (e.g., the mathematical notion of neighborhood stability) create a “severe a priori bias” against the diversity-stability hypothesis but that definitions of stability based on temporal variation avoided this bias. And, indeed, most of the current rese ...
... that several of these more stringent definitions (e.g., the mathematical notion of neighborhood stability) create a “severe a priori bias” against the diversity-stability hypothesis but that definitions of stability based on temporal variation avoided this bias. And, indeed, most of the current rese ...
The Impact of Congressman Pombo`s Anti
... • eliminate current protection for habitat without providing adequate alternative protection for habitat necessary for species recovery; • exempt all pesticide decisions from compliance with the Endangered Species Act for at least the next five years, meaning pesticides could be used no matter how m ...
... • eliminate current protection for habitat without providing adequate alternative protection for habitat necessary for species recovery; • exempt all pesticide decisions from compliance with the Endangered Species Act for at least the next five years, meaning pesticides could be used no matter how m ...
8 Conflicts over biodiversity
... terms almost certainly undervalue the variety concerned. A more holistic approach recognises ecosystem diversity. An ecosystem may be defined as a community of organisms and their physico-chemical environment interacting as an ecological unit; in other words, an ecosystem represents the entire biolo ...
... terms almost certainly undervalue the variety concerned. A more holistic approach recognises ecosystem diversity. An ecosystem may be defined as a community of organisms and their physico-chemical environment interacting as an ecological unit; in other words, an ecosystem represents the entire biolo ...
interactive effects of predation and dispersal on
... providing species that fill different ecological roles. I examined the consequences of invasion by fish (juvenile Lepomis macrochirus) and insect (Notonecta undulata) predators on experimental plankton communities that were either connected to or isolated from the regional pool of zooplankton specie ...
... providing species that fill different ecological roles. I examined the consequences of invasion by fish (juvenile Lepomis macrochirus) and insect (Notonecta undulata) predators on experimental plankton communities that were either connected to or isolated from the regional pool of zooplankton specie ...
500 AP Exam Questions - Mr. D`s Science Page
... 11. Which of the following statements regarding developed countries and developing countries is true? a) Developed countries are home to twice as many people as developing countries. b) Developed countries are home to four times as many people as developing countries. c) Developed countries have mor ...
... 11. Which of the following statements regarding developed countries and developing countries is true? a) Developed countries are home to twice as many people as developing countries. b) Developed countries are home to four times as many people as developing countries. c) Developed countries have mor ...
Structure and Stability of Ecological Networks resource use
... of ecological networks is investigated. Loss of one species in an ecosystem can trigger extinctions of other dependent species. For instance, specialist predators will go extinct following the loss of their only prey unless they can change their diet. It has therefore been suggested that an ability ...
... of ecological networks is investigated. Loss of one species in an ecosystem can trigger extinctions of other dependent species. For instance, specialist predators will go extinct following the loss of their only prey unless they can change their diet. It has therefore been suggested that an ability ...
Chapter 2
... of the world’s crops and drinking water for humans. Industry is based on availability of clean water. Fisheries are economically important. Non-consumptive uses such as recreation and eco-tourism associated with aquatic habitats generate significant economic activity. ...
... of the world’s crops and drinking water for humans. Industry is based on availability of clean water. Fisheries are economically important. Non-consumptive uses such as recreation and eco-tourism associated with aquatic habitats generate significant economic activity. ...
Appendix F: Invertebrates
... impacts. Anthropogenic influences having benthic contact, such as fishing gear (Etnoyer and Morgan 2003), seabed mining, and cable laying, and ones causing sediment deposits, such as paper mills, mines, and aquaculture, can result in extensive sponge damage and mortality. The greatest impact to spon ...
... impacts. Anthropogenic influences having benthic contact, such as fishing gear (Etnoyer and Morgan 2003), seabed mining, and cable laying, and ones causing sediment deposits, such as paper mills, mines, and aquaculture, can result in extensive sponge damage and mortality. The greatest impact to spon ...
Niches and Community Interactions
... An interaction in which one animal (the predator) captures and feeds on another animal (the prey) is called predation. ...
... An interaction in which one animal (the predator) captures and feeds on another animal (the prey) is called predation. ...
4.4 biological resources
... interest groups such as the California Native Plant Society (CNPS). These entities publish watch-lists of species whose numbers or habitats may be in decline for the purposes of including them as a species of concern. Sensitive biological resources also include habitats of limited occurrence or dist ...
... interest groups such as the California Native Plant Society (CNPS). These entities publish watch-lists of species whose numbers or habitats may be in decline for the purposes of including them as a species of concern. Sensitive biological resources also include habitats of limited occurrence or dist ...
51 - edl.io
... 11. Which of the following statements regarding developed countries and developing countries is true? a) Developed countries are home to twice as many people as developing countries. b) Developed countries are home to four times as many people as developing countries. c) Developed countries have mor ...
... 11. Which of the following statements regarding developed countries and developing countries is true? a) Developed countries are home to twice as many people as developing countries. b) Developed countries are home to four times as many people as developing countries. c) Developed countries have mor ...
section 4: environmental inventory and analysis
... said, “Knowing that there are turkeys, bluebirds, and deer living next door makes this place all the more special.” The types of wildlife species found in a town are dependent in part on the types of habitat found within the town. In general terms, the wildlife communities found in Holland can be ch ...
... said, “Knowing that there are turkeys, bluebirds, and deer living next door makes this place all the more special.” The types of wildlife species found in a town are dependent in part on the types of habitat found within the town. In general terms, the wildlife communities found in Holland can be ch ...
The Mesolithic mammal fauna of Great Britain
... When Britain was covered almost completely in woodland, about 7000 years ago (Bennett, 1988), the mammal fauna must have been very different from what it is now; not only were several now-extinct large mammals present, and none of the now-abundant introduced species, but the community relations (lar ...
... When Britain was covered almost completely in woodland, about 7000 years ago (Bennett, 1988), the mammal fauna must have been very different from what it is now; not only were several now-extinct large mammals present, and none of the now-abundant introduced species, but the community relations (lar ...
Ecosystems
... directly than dissimilar organisms. Example: Populations of two species of squirrels compete more directly than a population of squirrels and a population of rabbits. 4. Symbiosis describes types of relationships or interactions between different species. One symbiotic relationship can be explained ...
... directly than dissimilar organisms. Example: Populations of two species of squirrels compete more directly than a population of squirrels and a population of rabbits. 4. Symbiosis describes types of relationships or interactions between different species. One symbiotic relationship can be explained ...
What risks do hatcheries pose?
... Hatchery production has a legal foundation in the state. Provide significant harvest opportunity and economic ...
... Hatchery production has a legal foundation in the state. Provide significant harvest opportunity and economic ...
Evolution of Stable Ecosystems in Populations of
... instruction is written in place of the ancestral one and insertion/deletion mutations, where a random instruction is added or removed from the genome. In Avida, the success of an organism depends upon its growth rate. This is determined by an organism’s replication efficiency and by its interactions ...
... instruction is written in place of the ancestral one and insertion/deletion mutations, where a random instruction is added or removed from the genome. In Avida, the success of an organism depends upon its growth rate. This is determined by an organism’s replication efficiency and by its interactions ...
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.