![Parks Conservation and Lands - Commissioner for Sustainability](http://s1.studyres.com/store/data/016040826_1-e629034ab93c93e57cbb2842b676f52f-300x300.png)
Parks Conservation and Lands - Commissioner for Sustainability
... Numerous ecological studies and ecological theory indicate that when habitat is reduced in area and fragmented into small disconnected patches, the small populations of animals and plants dependent on that habitat face a higher risk of extinction, even when the reason for their initial decline (such ...
... Numerous ecological studies and ecological theory indicate that when habitat is reduced in area and fragmented into small disconnected patches, the small populations of animals and plants dependent on that habitat face a higher risk of extinction, even when the reason for their initial decline (such ...
Intra-host competition between co-infecting digeneans within a bivalve second intermediate host: dominance by priority-effect or taking advantage of others?
... For experimental infection, cockles were placed individually in plastic cylindrical containers (60 mm high 40 mm wide) and completely covered with fine sand so that only the cockle’s siphons would protrude above the substrate. The container was then filled with seawater to a depth of 15 mm above the ...
... For experimental infection, cockles were placed individually in plastic cylindrical containers (60 mm high 40 mm wide) and completely covered with fine sand so that only the cockle’s siphons would protrude above the substrate. The container was then filled with seawater to a depth of 15 mm above the ...
On the Status of Vermin - DigitalCommons@CalPoly
... that this is, in fact, what has happened.) The lack of coyotes is problematic because if there are not as many natural predators, then there will potentially be too many survivors and this is the case for prairie dogs. By eliminating the prairie dogs natural predators, they have been able to breed a ...
... that this is, in fact, what has happened.) The lack of coyotes is problematic because if there are not as many natural predators, then there will potentially be too many survivors and this is the case for prairie dogs. By eliminating the prairie dogs natural predators, they have been able to breed a ...
Management of Feral Cats - Australasian Wildlife Management Society
... Europeans introduced Feral Cats (Felis catus) to Australia and New Zealand (Abbott 2002). Early records (relative to European settlement) of feral cats in central Australia suggest their distribution expanded rapidly and the species now occupies most terrestrial habitats. Feral cats are carnivores w ...
... Europeans introduced Feral Cats (Felis catus) to Australia and New Zealand (Abbott 2002). Early records (relative to European settlement) of feral cats in central Australia suggest their distribution expanded rapidly and the species now occupies most terrestrial habitats. Feral cats are carnivores w ...
nile perch - The Pringle Lab at Princeton
... responses to Nile perch depending on where in the literature one looks. Many have argued that the Nile perch has been a disaster for small-scale fishermen, who dislike the fish. Others have highlighted positive effects of economic growth and favorable reactions by fishermen. In reality, local percep ...
... responses to Nile perch depending on where in the literature one looks. Many have argued that the Nile perch has been a disaster for small-scale fishermen, who dislike the fish. Others have highlighted positive effects of economic growth and favorable reactions by fishermen. In reality, local percep ...
Species evenness and productivity in experimental plant communities
... 1996, Weiher and Keddy 1999). Many different mathematical descriptions have been devised to depict the relative abundances of coexisting species (MacArthur 1960, Whittaker 1965, Pielou 1975, Gray 1987), but they all agree in one respect: most communities have a few very common species and many uncom ...
... 1996, Weiher and Keddy 1999). Many different mathematical descriptions have been devised to depict the relative abundances of coexisting species (MacArthur 1960, Whittaker 1965, Pielou 1975, Gray 1987), but they all agree in one respect: most communities have a few very common species and many uncom ...
scoped environmental impact study
... other natural features that meet the criteria for designation as natural heritage system (NHS) components will be retained and protected with setbacks and other buffer management measures determined through this Scoped EIS. The site is located within the Eramosa River Watershed. The subject property ...
... other natural features that meet the criteria for designation as natural heritage system (NHS) components will be retained and protected with setbacks and other buffer management measures determined through this Scoped EIS. The site is located within the Eramosa River Watershed. The subject property ...
The Ecology of Mutualism
... instances of high phosphate levels the increased uptake caused by mycorrhizae can cause phosphate poisoning (42). Nutrient uptake by endozoic algae has been found in coral zooxanthellae, which take up ammoniafrom seawater (222), and in green hydra, whose bacterial symbionts increase uptake of phosph ...
... instances of high phosphate levels the increased uptake caused by mycorrhizae can cause phosphate poisoning (42). Nutrient uptake by endozoic algae has been found in coral zooxanthellae, which take up ammoniafrom seawater (222), and in green hydra, whose bacterial symbionts increase uptake of phosph ...
Gibb and Hochuli 2004 - Department of Biological Science
... expected to be affected by its exclusion through indirect or diffuse competition. In the initial surveys at each site, the ends of eight transects, each 10 m long, and passing through minimal vegetation, were marked with chalk on the rock surface. Transects were walked for 5 min and the presence or ...
... expected to be affected by its exclusion through indirect or diffuse competition. In the initial surveys at each site, the ends of eight transects, each 10 m long, and passing through minimal vegetation, were marked with chalk on the rock surface. Transects were walked for 5 min and the presence or ...
What is 1080? - Department of Agriculture and Food
... The Chief Executive Officer of the Department of Agriculture and Food, Western Australia and the State of Western Australia and their officers, employees and agents will not be liable, in negligence or otherwise, to any person for any loss, liability or damage arising out of an act or failure to act ...
... The Chief Executive Officer of the Department of Agriculture and Food, Western Australia and the State of Western Australia and their officers, employees and agents will not be liable, in negligence or otherwise, to any person for any loss, liability or damage arising out of an act or failure to act ...
Alien predators and amphibian declines: review of two decades of
... source is probably an angler’s bait bucket. The dumping of bait buckets is the most important vector for the introduction of alien crayfish (Ludwig & Leitch, 1996; Lodge et al., 2000). Mosquitofish also spread via similar mechanisms after being introduced for biocontrol purposes (Gamradt & Kats, 199 ...
... source is probably an angler’s bait bucket. The dumping of bait buckets is the most important vector for the introduction of alien crayfish (Ludwig & Leitch, 1996; Lodge et al., 2000). Mosquitofish also spread via similar mechanisms after being introduced for biocontrol purposes (Gamradt & Kats, 199 ...
Monitoring Marine Invasive Species in Mediterranean Marine
... and habitats of the Mediterranean cannot be generalized, as alien species can cause very diverse effects at different locations or different times, sometimes with a strong invasive component and sometimes not. Marine invasions can also have economic and human health implications. In Europe, the econ ...
... and habitats of the Mediterranean cannot be generalized, as alien species can cause very diverse effects at different locations or different times, sometimes with a strong invasive component and sometimes not. Marine invasions can also have economic and human health implications. In Europe, the econ ...
Cirripedia: The Barnacles - Marine Biodiversity Center
... the Thoracica form intricate symbiotic associations with larger organisms such as whales, sea snakes, lobsters, medusae, corals, and sponges. A few have become nutritionally dependent on sharks, worms, or corals, which in earlier stages of their evolution they exploited simply for support or protect ...
... the Thoracica form intricate symbiotic associations with larger organisms such as whales, sea snakes, lobsters, medusae, corals, and sponges. A few have become nutritionally dependent on sharks, worms, or corals, which in earlier stages of their evolution they exploited simply for support or protect ...
Quadrats Online: Teacher Notes
... A quadrat is a tool used to record the abundance or density of a particular species in a study area. In some instances it may be possible to simply count the number of organisms of a particular species in an area. However, in most cases counting all of the organisms would not be practical and other ...
... A quadrat is a tool used to record the abundance or density of a particular species in a study area. In some instances it may be possible to simply count the number of organisms of a particular species in an area. However, in most cases counting all of the organisms would not be practical and other ...
Hydrilla - Alaska Center for Conservation Science
... Native and current distribution: Hydrilla is probably native to the warmer regions of Asia (Cook and Lüönd 1982). It is a cosmopolitan species that occurs in Europe, Asia, Australia, New Zealand, the Pacific Islands, Africa, North America, and South America. In the United States, hydrilla population ...
... Native and current distribution: Hydrilla is probably native to the warmer regions of Asia (Cook and Lüönd 1982). It is a cosmopolitan species that occurs in Europe, Asia, Australia, New Zealand, the Pacific Islands, Africa, North America, and South America. In the United States, hydrilla population ...
Is there a relationship between herbaceous species richness and
... Abstract Cenchrus ciliaris L. (buffel grass) (Poaceae) is recognized as one of Australia’s most serious environmental weeds. This introduced grass has been associated with loss of native species and alteration of fire regimes. However, it is also highly valued as a pasture species for arid and semia ...
... Abstract Cenchrus ciliaris L. (buffel grass) (Poaceae) is recognized as one of Australia’s most serious environmental weeds. This introduced grass has been associated with loss of native species and alteration of fire regimes. However, it is also highly valued as a pasture species for arid and semia ...
Succession - Miss Gerges
... • Often follows a wildfire, hurricane, or other natural disturbance. • Thought of these events as disasters, but many species are adapted to them. Although forest fires kill some trees, for example, other trees are spared, and fire can stimulate their seeds to germinate. • Secondary succession can a ...
... • Often follows a wildfire, hurricane, or other natural disturbance. • Thought of these events as disasters, but many species are adapted to them. Although forest fires kill some trees, for example, other trees are spared, and fire can stimulate their seeds to germinate. • Secondary succession can a ...
Food web relationships involving Anadiplosis sp. galls
... of widespread occurrence in the Brazilian "cerrados" (Hoehne 1941) whose leaf galls have been described morphologically by Fernandes et al. (1982, 1987). These galls are caused by a new species of Anadiplosis sp. (Diptera: Cecidomyiidae, nearA. venustaTavares, R.J. Gagné, personal communication). Th ...
... of widespread occurrence in the Brazilian "cerrados" (Hoehne 1941) whose leaf galls have been described morphologically by Fernandes et al. (1982, 1987). These galls are caused by a new species of Anadiplosis sp. (Diptera: Cecidomyiidae, nearA. venustaTavares, R.J. Gagné, personal communication). Th ...
Primefact 9: Macquarie Perch, Third Editon
... lake habitats; especially the upper reaches of rivers and their tributaries. • The species is relatively fecund, fast growing and early maturing. • They are a relatively long-lived species with reports of fish from Victoria aged up to 17 ...
... lake habitats; especially the upper reaches of rivers and their tributaries. • The species is relatively fecund, fast growing and early maturing. • They are a relatively long-lived species with reports of fish from Victoria aged up to 17 ...
Chapter 53 communities
... Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings ...
... Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings ...
video slide - Course-Not
... Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings ...
... Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings ...
CHANGES IN TURBULENT MIXING SHIFT COMPETITION FOR
... our competition model, for a wide range of water-column depths and turbulent diffusivities. We will say that there is bloom development if a phytoplankton population can increase in abundance when rare. Fig. 3A shows the model predictions thus obtained for a monoculture of the buoyant cyanobacterium ...
... our competition model, for a wide range of water-column depths and turbulent diffusivities. We will say that there is bloom development if a phytoplankton population can increase in abundance when rare. Fig. 3A shows the model predictions thus obtained for a monoculture of the buoyant cyanobacterium ...
Mutualisms in a changing world: an evolutionary
... et al. (2008) synthesized data from 688 published studies to illustrate that global change (e.g., CO2 enrichment, nitrogen deposition, climate, biotic invasions and land uses) is driving sometimes seemingly minor changes in individual interactions, but that these changes can compound, resulting in m ...
... et al. (2008) synthesized data from 688 published studies to illustrate that global change (e.g., CO2 enrichment, nitrogen deposition, climate, biotic invasions and land uses) is driving sometimes seemingly minor changes in individual interactions, but that these changes can compound, resulting in m ...
Mid-Atlantic/Southern New England BCR Plan
... Brant, and Canvasback. Exploitation and pollution of Chesapeake Bay and other coastal zones, and the accompanying loss of submerged aquatic vegetation have significantly reduced the value of these systems to all waterbirds. Many bird species within the BCR depend heavily on remaining expanses and p ...
... Brant, and Canvasback. Exploitation and pollution of Chesapeake Bay and other coastal zones, and the accompanying loss of submerged aquatic vegetation have significantly reduced the value of these systems to all waterbirds. Many bird species within the BCR depend heavily on remaining expanses and p ...
Game Structures in Mutualistic Interactions: What Can
... explaining how the investment behavior promotes benefits that outweigh the costs. Note that kin selection theory too starts with the observation of one animal investing into another, and then explains this oddity away with the concept of relatedness. The same is true for reciprocity based on the ite ...
... explaining how the investment behavior promotes benefits that outweigh the costs. Note that kin selection theory too starts with the observation of one animal investing into another, and then explains this oddity away with the concept of relatedness. The same is true for reciprocity based on the ite ...
Introduced species
![](https://commons.wikimedia.org/wiki/Special:FilePath/Melilotus_alba_bgiu.jpg?width=300)
An introduced, alien, exotic, non-indigenous, or non-native species, or simply an introduction, is a species living outside its native distributional range, which has arrived there by human activity, either deliberate or accidental. Non-native species can have various effects on the local ecosystem. Introduced species that become established and spread beyond the place of introduction are called invasive species. Some have a negative effect on a local ecosystem. Some introduced species may have no negative effect or only minor impact. Some species have been introduced intentionally to combat pests. They are called biocontrols and may be regarded as beneficial as an alternative to pesticides in agriculture for example. In some instances the potential for being beneficial or detrimental in the long run remains unknown. A list of some introduced species is given in a separate article.The effects of introduced species on natural environments have gained much scrutiny from scientists, governments, farmers and others.