Discovery of the invasive Mayan Cichlid fish “Cichlasoma
... into Florida (USA). Based on what is known about Florida “C.” urophthalmus, it is predicted that this cichlid will further invade coastal and inland waters in Thailand and elsewhere in Southeast Asia. This cichlid has a long history in the aquarium trade in Europe. However, there are no records from ...
... into Florida (USA). Based on what is known about Florida “C.” urophthalmus, it is predicted that this cichlid will further invade coastal and inland waters in Thailand and elsewhere in Southeast Asia. This cichlid has a long history in the aquarium trade in Europe. However, there are no records from ...
4.0 Billion Years of Earth Environmental Change
... Between about 18,000 and 11,500 years ago the climate and environments of North America were changing rapidly. Temperatures were warming. Rainfall patterns were changing. The glaciers were melting. The seasonal difference in temperatures was increasing. These climate changes were causing fundamental ...
... Between about 18,000 and 11,500 years ago the climate and environments of North America were changing rapidly. Temperatures were warming. Rainfall patterns were changing. The glaciers were melting. The seasonal difference in temperatures was increasing. These climate changes were causing fundamental ...
Coupling low and high trophic levels models : towards a pathways
... their own formulation of predator functional response in Ecosim by assuming that a predator can only feed on the vulnerable component of a prey population, and that the functional response between predators and the vulnerable part of their prey is unsaturated (LotkaVolterra predation mortality). The ...
... their own formulation of predator functional response in Ecosim by assuming that a predator can only feed on the vulnerable component of a prey population, and that the functional response between predators and the vulnerable part of their prey is unsaturated (LotkaVolterra predation mortality). The ...
Eco Jeopardy 5
... Small animals in streams and creeks that are very susceptible to water pollution. ...
... Small animals in streams and creeks that are very susceptible to water pollution. ...
Oceans Work Package 2 - hrsbstaff.ednet.ns.ca
... populations of prey species. The decimation of these important shark species can have cascading effects throughout the ecosystems they inhabit, resulting in economically and ecologically devastating consequences. Unfortunately, sharks have been eliminated from so many parts of the ocean that we now ...
... populations of prey species. The decimation of these important shark species can have cascading effects throughout the ecosystems they inhabit, resulting in economically and ecologically devastating consequences. Unfortunately, sharks have been eliminated from so many parts of the ocean that we now ...
Dietary guild structure of the fish community in the Northeast United
... Stomach contents during both periods were identified to the lowest possible taxonomic level. Since stomach contents were identified in the laboratory during the earlier time period (1973 to 1980), the taxonomic resolution of invertebrate prey is generally higher in these samples than during the late ...
... Stomach contents during both periods were identified to the lowest possible taxonomic level. Since stomach contents were identified in the laboratory during the earlier time period (1973 to 1980), the taxonomic resolution of invertebrate prey is generally higher in these samples than during the late ...
2012-13 in Review - Department of Environment, Land, Water and
... I look forward to building on this foundation in coming years ...
... I look forward to building on this foundation in coming years ...
Aquatic habitat protection and restoration in NSW (Murray
... Border Rivers/Gwydir, Namoi, Western, Central West, Lachlan, Murrumbidgee, Lower MurrayDarling and Murray. The CMA Boards will report directly to the Minister for Infrastructure, Planning and Natural Resources. The CMAs were set up to engage regional communities in key natural resource management is ...
... Border Rivers/Gwydir, Namoi, Western, Central West, Lachlan, Murrumbidgee, Lower MurrayDarling and Murray. The CMA Boards will report directly to the Minister for Infrastructure, Planning and Natural Resources. The CMAs were set up to engage regional communities in key natural resource management is ...
Food-web theory provides guidelines for marine
... predator on a food chain feeding upon a strong interactor which in turn feeds upon an architectural species (such as kelp), or (2) if the strong interactor is a predator feeding upon the dominant primary producer or architectural species. This should occur even though the strong interactor has low a ...
... predator on a food chain feeding upon a strong interactor which in turn feeds upon an architectural species (such as kelp), or (2) if the strong interactor is a predator feeding upon the dominant primary producer or architectural species. This should occur even though the strong interactor has low a ...
Mutualism (biology) - Basic Knowledge 101
... of plants. This is similar to pollination in that the plant produces food resources (for example, fleshy fruit, over- In some of these relationships, the cost of the ant’s proabundance of seeds) for animals that disperse the seeds tection can be quite expensive. Cordia sp. trees in the (service). Ama ...
... of plants. This is similar to pollination in that the plant produces food resources (for example, fleshy fruit, over- In some of these relationships, the cost of the ant’s proabundance of seeds) for animals that disperse the seeds tection can be quite expensive. Cordia sp. trees in the (service). Ama ...
Clupea harengus membras
... below the threshold and the recruitment has been stable (Swedish Board of Fisheries 2010). However, there are some concerns about the herring stock in the Baltic Sea, including Gulf of Bothnia. Catch statistics indicate that herring over the last 20 years has become smaller in size (Lundmark, 2010). ...
... below the threshold and the recruitment has been stable (Swedish Board of Fisheries 2010). However, there are some concerns about the herring stock in the Baltic Sea, including Gulf of Bothnia. Catch statistics indicate that herring over the last 20 years has become smaller in size (Lundmark, 2010). ...
Biodiversity: an introduction - European Capitals of Biodiversity
... This process predominantly affects species level diversity, in that it leads to the creation of novel species. Speciation arises via three different ways: geographical isolation, competition, and polyploidy. 1. Geographical isolation results from the division of a population into two or more separat ...
... This process predominantly affects species level diversity, in that it leads to the creation of novel species. Speciation arises via three different ways: geographical isolation, competition, and polyploidy. 1. Geographical isolation results from the division of a population into two or more separat ...
3 The Role of Top Carnivores in
... much of the globe, drastically reducing the geographical ranges of many species, including wolves, bears, tigers, lions, and many less intimidating beasts. Nevertheless, herbivores have generally not overrun predatorfree portions of the planet, as we would expect if herbivore populations were indeed ...
... much of the globe, drastically reducing the geographical ranges of many species, including wolves, bears, tigers, lions, and many less intimidating beasts. Nevertheless, herbivores have generally not overrun predatorfree portions of the planet, as we would expect if herbivore populations were indeed ...
Biological Collections From The Marine Ecosystem
... Our overall approach was to collect organisms using a sampling plan developed from previous work at Amchitka and in the Aleutians, modified to reflect foods eaten by Aleuts and caught for commercial fisheries, and to provide information needed for developing a long term biomonitoring/stewardship pla ...
... Our overall approach was to collect organisms using a sampling plan developed from previous work at Amchitka and in the Aleutians, modified to reflect foods eaten by Aleuts and caught for commercial fisheries, and to provide information needed for developing a long term biomonitoring/stewardship pla ...
paper - institute for theoretical physics cologne
... coexistence at the fixed point of population dynamics, and show how the combination of competition and environmental fluctuations limit the maximum amount of biodiversity that a trophic level can host. In the second paper we consider models of species assembly, kept away from the fixed point of popu ...
... coexistence at the fixed point of population dynamics, and show how the combination of competition and environmental fluctuations limit the maximum amount of biodiversity that a trophic level can host. In the second paper we consider models of species assembly, kept away from the fixed point of popu ...
Monday
... argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations. MS-LS2-5 : Evaluate competing design solutions for ...
... argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations. MS-LS2-5 : Evaluate competing design solutions for ...
Divergence of above- and belowground C and N
... Abstract. The coupling of carbon cycle and nitrogen cycle drives the food web structure and biogeochemistry of an ecosystem. However, across precipitation gradients, there may be a shift in C pool and N pool from above- to belowground because of shifting plant stoichiometry and allocation. Based on ...
... Abstract. The coupling of carbon cycle and nitrogen cycle drives the food web structure and biogeochemistry of an ecosystem. However, across precipitation gradients, there may be a shift in C pool and N pool from above- to belowground because of shifting plant stoichiometry and allocation. Based on ...
Classification Ecosystem Energy Relationships Human Impact Kick
... is subdivided into smaller and smaller groups ending with the smallest group, which includes all organisms of the same kind. The smallest classification category is a species. Organisms that belong to the same species are very similar to each other and can mate and produce fertile offspring. Fertile ...
... is subdivided into smaller and smaller groups ending with the smallest group, which includes all organisms of the same kind. The smallest classification category is a species. Organisms that belong to the same species are very similar to each other and can mate and produce fertile offspring. Fertile ...
Economic and socio-cultural priorities for marine conservation
... In keeping with the observational, alienation and perceptual hurdles discussed above, it has been argued that society’s relationship to the sea is largely defined in terms of the resources it provides, particularly in relation to the importance of sea fish (Cole-King 1995). Fishing is of very high e ...
... In keeping with the observational, alienation and perceptual hurdles discussed above, it has been argued that society’s relationship to the sea is largely defined in terms of the resources it provides, particularly in relation to the importance of sea fish (Cole-King 1995). Fishing is of very high e ...
Protecting the Environment Through the Ownership Society — Part II
... other natural resources, like ocean fisheries. Unfortunately, the federal government has managed the public’s natural resources as poorly as it has managed the federal budget. Unable to balance land use and preservation, government management of public lands has shifted between periods of exploitatio ...
... other natural resources, like ocean fisheries. Unfortunately, the federal government has managed the public’s natural resources as poorly as it has managed the federal budget. Unable to balance land use and preservation, government management of public lands has shifted between periods of exploitatio ...
Red swamp crayfish Scientific name: Procambarus clarkii
... lentic situations (NatureServe 2010). In cool regions of Europe, it prefers small permanent ponds. The red swamp crayfish is able to tolerate dry periods of up to four months (Global Invasive Species Database 2011). Average number of reproductive events per adult 0 female per year (0‐5) Dependi ...
... lentic situations (NatureServe 2010). In cool regions of Europe, it prefers small permanent ponds. The red swamp crayfish is able to tolerate dry periods of up to four months (Global Invasive Species Database 2011). Average number of reproductive events per adult 0 female per year (0‐5) Dependi ...
ENVIRONMENTAL SCIENCE- BIO130 Objectives for Unit 1
... Describe the extinction crisis that currently exists. Distinguish between endangered and threatened species. Give three examples of each. Describe the economic, medical, aesthetic, ecological, and ethical significance of wild species. Describe why species become extinct. Describe ways that h ...
... Describe the extinction crisis that currently exists. Distinguish between endangered and threatened species. Give three examples of each. Describe the economic, medical, aesthetic, ecological, and ethical significance of wild species. Describe why species become extinct. Describe ways that h ...
new learning outcomes - Manitoba Forestry Association
... Describe concepts related to forest ecology, including soil, forest types, tree ...
... Describe concepts related to forest ecology, including soil, forest types, tree ...
The ecology of recovery
... habitat requirements; reducing their probability of recovering from habitat disturbance. For example, in the Australian snake family Elapidae there are two strategies of prey capture: by ambush (relying on sites with particular types of ground cover) or active search. A phylogenetic comparison showe ...
... habitat requirements; reducing their probability of recovering from habitat disturbance. For example, in the Australian snake family Elapidae there are two strategies of prey capture: by ambush (relying on sites with particular types of ground cover) or active search. A phylogenetic comparison showe ...
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.