View plan for Ekahanui Management Unit
... significant alien species and ranks their potential invasiveness and distribution. Each species was given a weed management code: 0 = not reported from MU, 1 = incipient (goal: eradicate), 2 = control locally. While the list is by no means exhaustive, it provides a good starting point for discussing ...
... significant alien species and ranks their potential invasiveness and distribution. Each species was given a weed management code: 0 = not reported from MU, 1 = incipient (goal: eradicate), 2 = control locally. While the list is by no means exhaustive, it provides a good starting point for discussing ...
Importance of the Allee effect for reintroductions1
... partly balances the economic loss, and negative outcomes often erode potential financial support for subsequent, better-designed programs (Freckleton, 2000). Finally, reintroduction failures may also be considered to be a waste of “valuable individuals”, since these programs generally involve alread ...
... partly balances the economic loss, and negative outcomes often erode potential financial support for subsequent, better-designed programs (Freckleton, 2000). Finally, reintroduction failures may also be considered to be a waste of “valuable individuals”, since these programs generally involve alread ...
The Impact of Non-Native Species - Case Study: The Signal Crayfish
... our native fisheries by influencing the ecosystems they invade. For example, invading primary consumers, such as molluscs, disrupt food-webs from the base, and aquatic plants affect the water quality and quantity of primary production, leading to changes in dissolved oxygen levels and thus impacting ...
... our native fisheries by influencing the ecosystems they invade. For example, invading primary consumers, such as molluscs, disrupt food-webs from the base, and aquatic plants affect the water quality and quantity of primary production, leading to changes in dissolved oxygen levels and thus impacting ...
Nekton use of marsh-surface habitats in Louisiana (USA) deltaic salt
... insure that marshes at all sites were flooded. In July, the 3 lift nets on Channel B had to b e moved about 100 m, outside an area of vegetation dieoff. The cause of the vegetation dieoff is unknown, but it followed a period of unusually high tides in the spring of 1991. Prolonged flooding of the ar ...
... insure that marshes at all sites were flooded. In July, the 3 lift nets on Channel B had to b e moved about 100 m, outside an area of vegetation dieoff. The cause of the vegetation dieoff is unknown, but it followed a period of unusually high tides in the spring of 1991. Prolonged flooding of the ar ...
Ecology of the New Zealand Rocky Shore Community
... plentiful in the nutrient-rich coastal seas. This plentiful food supply supports many different species of filter feeding animals in large numbers on the rocky shore which extract the plankton from the water when submerged by the tide e.g. mussels, oysters, bryozoans, seasquirts, anemones and barnac ...
... plentiful in the nutrient-rich coastal seas. This plentiful food supply supports many different species of filter feeding animals in large numbers on the rocky shore which extract the plankton from the water when submerged by the tide e.g. mussels, oysters, bryozoans, seasquirts, anemones and barnac ...
Goliath grouper issues in Florida: fact or fiction. Christopher C
... Goliath grouper (Epinephelus itajara), a large reef fish with populations in tropical Atlantic waters, is vulnerable to overexploitation and local extinction and is classified as critically endangered throughout most of its range by the World Conservation Union (IUCN). Yet populations in southeaster ...
... Goliath grouper (Epinephelus itajara), a large reef fish with populations in tropical Atlantic waters, is vulnerable to overexploitation and local extinction and is classified as critically endangered throughout most of its range by the World Conservation Union (IUCN). Yet populations in southeaster ...
Impacts and Management of the Alien Eastern Gray Squirrel in Great
... Forest Commission in the United Kingdom has designed a red-only supplementary food hopper that selects for red squirrels on a weight basis (Pepper 1993). Red squirrels can access the food, but the heavier gray squirrel falls through a see-saw floor before reaching the food container. However, the ef ...
... Forest Commission in the United Kingdom has designed a red-only supplementary food hopper that selects for red squirrels on a weight basis (Pepper 1993). Red squirrels can access the food, but the heavier gray squirrel falls through a see-saw floor before reaching the food container. However, the ef ...
Conserving Biodiversity Through Sustainable Forestry
... includes topics that the Commission members have identified as important elements of forest biodiversity. Some serious gaps in scientific knowledge about many of these topics have been filled by NCSSF-sponsored research projects that produced new scientific findings and practical tools for applying ...
... includes topics that the Commission members have identified as important elements of forest biodiversity. Some serious gaps in scientific knowledge about many of these topics have been filled by NCSSF-sponsored research projects that produced new scientific findings and practical tools for applying ...
. Red Swamp Crayfish, Procambarus clarkii Overview Overview
... Red swamp crayfish are large and highly fecund, and so populations can quickly cause changes in aquatic food webs. They are omnivorous, with food sources including detritus, macroinvertebrates, green plants, juvenile fish and amphibians, and have been implicated in species declines in some areas. Ex ...
... Red swamp crayfish are large and highly fecund, and so populations can quickly cause changes in aquatic food webs. They are omnivorous, with food sources including detritus, macroinvertebrates, green plants, juvenile fish and amphibians, and have been implicated in species declines in some areas. Ex ...
Rain Forest in the City: Bukit Timah Nature Reserve Singapore
... which they live'. Since June, 1990, the nature reserves, including Bukit Timah, have been administered by the Nature Reserves Committee under the National Parks Board, a statutory board which also manages the Singapore Botanic Gardens and Fort Canning Park. An additional five hectares have been adde ...
... which they live'. Since June, 1990, the nature reserves, including Bukit Timah, have been administered by the Nature Reserves Committee under the National Parks Board, a statutory board which also manages the Singapore Botanic Gardens and Fort Canning Park. An additional five hectares have been adde ...
CITES AND THE CBD
... o Care should be taken that the latter exceed the former o Specific problems to be solved should be identified Collaboration and/or synergy should take place at the following levels: o National o Regional o International – through Convention institutions and processes (not only the Secretariats) ...
... o Care should be taken that the latter exceed the former o Specific problems to be solved should be identified Collaboration and/or synergy should take place at the following levels: o National o Regional o International – through Convention institutions and processes (not only the Secretariats) ...
PHILOSOPHY, HISTORY
... communities that are thought to differ mainly in the factor of interest. For exam:ple, to understand the effect of predators on prey abundance, one could compare prey distributions on islands with and without predators (e.g., Schoener and Toft 1983). Natural experiments form the basis of many studie ...
... communities that are thought to differ mainly in the factor of interest. For exam:ple, to understand the effect of predators on prey abundance, one could compare prey distributions on islands with and without predators (e.g., Schoener and Toft 1983). Natural experiments form the basis of many studie ...
Education_LeadersGuide-Spring... - AC Archive Home
... spring, the chlorophyll starts working, and the plants turn green. For the plant-‐ eaters in the Arctic food web, that means, essentially, that dinner is served. The process of spring green-‐up ...
... spring, the chlorophyll starts working, and the plants turn green. For the plant-‐ eaters in the Arctic food web, that means, essentially, that dinner is served. The process of spring green-‐up ...
Ferruginous Hawk (Buteo regalis)
... Ferruginous Hawks now occupy about half of their historical range in Canada. In Alberta, the population was estimated at 618 ± 162 pairs in 2005, substantially lower than earlier estimates. Whether this is due to an actual decline in numbers in Alberta or improvements in survey techniques in unknown ...
... Ferruginous Hawks now occupy about half of their historical range in Canada. In Alberta, the population was estimated at 618 ± 162 pairs in 2005, substantially lower than earlier estimates. Whether this is due to an actual decline in numbers in Alberta or improvements in survey techniques in unknown ...
Ecosystem consequences of diversity depend on food chain length
... which reached fourfold higher density in the presence of crabs than in their absence; this facilitation of ampithoids compensated partially for the loss of Idotea to crabs, such that total grazer abundance was little affected by predation (Fig. 3), although total grazer biomass was reduced (Fig. 2a) ...
... which reached fourfold higher density in the presence of crabs than in their absence; this facilitation of ampithoids compensated partially for the loss of Idotea to crabs, such that total grazer abundance was little affected by predation (Fig. 3), although total grazer biomass was reduced (Fig. 2a) ...
AB 1325 - LegTrack
... Delta smelt has in the past significantly affected operations at state pumping facilities and water exports from the Delta, in the past year federal fish officials placed no restrictions on pumping from the South Delta because the smelt were mostly not present. It is also important to understand the ...
... Delta smelt has in the past significantly affected operations at state pumping facilities and water exports from the Delta, in the past year federal fish officials placed no restrictions on pumping from the South Delta because the smelt were mostly not present. It is also important to understand the ...
Noxious Weeds in Washington State
... crop production, which can contribute to higher prices of food for all of us. Invasive knapweeds and yellow starthistle outcompete forage species, reducing grazing quality of rangeland and pastures. Infestations of these species result in an estimated loss of $950,000 in forage production in eastern ...
... crop production, which can contribute to higher prices of food for all of us. Invasive knapweeds and yellow starthistle outcompete forage species, reducing grazing quality of rangeland and pastures. Infestations of these species result in an estimated loss of $950,000 in forage production in eastern ...
Synchronous dynamics of zooplankton competitors
... communities [1,2] and of the processes structuring community composition [3–5]. Synchrony and its alternative pattern, compensation (or compensatory dynamics), are mutually exclusive phenomenological features of community dynamics that can arise from many underlying mechanisms [6,7]. Compensation ma ...
... communities [1,2] and of the processes structuring community composition [3–5]. Synchrony and its alternative pattern, compensation (or compensatory dynamics), are mutually exclusive phenomenological features of community dynamics that can arise from many underlying mechanisms [6,7]. Compensation ma ...
Environmental Science Chapter 8 Revision
... cacti as they eat the nectar in cacti’s flowers and spread seeds when they eat the cactus fruit. Studies of the cacti show that they are not producing as much fruit as they could. It was also noted that bats living near these cacti had been driven from their cave homes by local villagers. What is th ...
... cacti as they eat the nectar in cacti’s flowers and spread seeds when they eat the cactus fruit. Studies of the cacti show that they are not producing as much fruit as they could. It was also noted that bats living near these cacti had been driven from their cave homes by local villagers. What is th ...
the fern understory as an ecological filter
... 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 a selective filter that differentially influences growth and survival of tree-seedlin ...
... 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 a selective filter that differentially influences growth and survival of tree-seedlin ...
Full text in pdf format
... ern Andean slope of both countries belong to the same extinction due to this factor could be even greater. The subspecies. threats posed by human attitudes towards the felid We did not extensively monitor the northern region species, in addition to the loss and fragmentation of of the country, even ...
... ern Andean slope of both countries belong to the same extinction due to this factor could be even greater. The subspecies. threats posed by human attitudes towards the felid We did not extensively monitor the northern region species, in addition to the loss and fragmentation of of the country, even ...
Universidade Federal de Uberlândia Instituto de Biologia Programa
... Connell experiments demonstrated that competitive exclusion occurs in nature, and this may explain the distinction between fundamental and realized niches and also species spatial distribution. There are still some good recent examples in literature. Leathwick & Austin (2001), for instance, demonstr ...
... Connell experiments demonstrated that competitive exclusion occurs in nature, and this may explain the distinction between fundamental and realized niches and also species spatial distribution. There are still some good recent examples in literature. Leathwick & Austin (2001), for instance, demonstr ...
AN ASSESSMENT OF THE USEFULNESS OF WINTER NORTH AND SOUTH DAKOTA
... and Iowa, produces more than 50% of all ducks in North America (Smith et al. 1964). This unique area is characterized by thousands of small, depressional wetlands (potholes) throughout the landscape as a result of glaciations over 10,000 years ago (van der Valk 1989). Although the PPR has tremendous ...
... and Iowa, produces more than 50% of all ducks in North America (Smith et al. 1964). This unique area is characterized by thousands of small, depressional wetlands (potholes) throughout the landscape as a result of glaciations over 10,000 years ago (van der Valk 1989). Although the PPR has tremendous ...
The Feral Cat (Felis catus)
... Conventional control techniques have been successful in eradicating feral cats from some offshore islands. Due to a very successful program conducted between the Commonwealth and Tasmania with funds from the Natural Heritage Trust, feral cats have been successfully removed from Macquarie Island. Thi ...
... Conventional control techniques have been successful in eradicating feral cats from some offshore islands. Due to a very successful program conducted between the Commonwealth and Tasmania with funds from the Natural Heritage Trust, feral cats have been successfully removed from Macquarie Island. Thi ...
RRA proof-1
... of resident rainbow trout O mykiss, which are abundant in the mainstem Cedar River have also ...
... of resident rainbow trout O mykiss, which are abundant in the mainstem Cedar River have also ...
Habitat conservation
Habitat conservation is a land management practice that seeks to conserve, protect and restore habitat areas for wild plants and animals, especially conservation reliant species, and prevent their extinction, fragmentation or reduction in range. It is a priority of many groups that cannot be easily characterized in terms of any one ideology.