Asymmetric larval interactions between introduced and indigenous
... of 44 treatment combinations (six species combinations×four or three age combinations×two food levels), each of which we replicated 30 times (yielding a grand total for sample size of 1,320 pairs of larvae). The ladybird larvae used in the experiment had molted within the previous 12 h. We observed ...
... of 44 treatment combinations (six species combinations×four or three age combinations×two food levels), each of which we replicated 30 times (yielding a grand total for sample size of 1,320 pairs of larvae). The ladybird larvae used in the experiment had molted within the previous 12 h. We observed ...
European Red Fox - Yass Area Network
... landscape scale as young foxes can disperse large distances (2 40kms) from their home and can quickly re-invade controlled areas.2 Baiting at least twice a year (autumn and spring) in the month leading up to lambing is also recommended. This will reduced local fox populations and the associated pred ...
... landscape scale as young foxes can disperse large distances (2 40kms) from their home and can quickly re-invade controlled areas.2 Baiting at least twice a year (autumn and spring) in the month leading up to lambing is also recommended. This will reduced local fox populations and the associated pred ...
A Feasibility Study for the Eradication of House Mice from
... The report aims to answer three questions that any decision-maker would want answered, or at least made transparent, if they were to invest the substantial funds required to attempt eradication of the mice. These questions are: Is the attempt justified by the potential benefits? Predation by mice on ...
... The report aims to answer three questions that any decision-maker would want answered, or at least made transparent, if they were to invest the substantial funds required to attempt eradication of the mice. These questions are: Is the attempt justified by the potential benefits? Predation by mice on ...
Fluctuating resources in plant communities: a general theory of invasibility FORUM
... variation in these resources, exotic species might be able to invade and coexist in species-rich communities. Invasions by exotic species are often studied and discussed as if they were a distinct ecological phenomenon (Elton 1958; Dukes & Mooney 1999). However, we concur with Huston (1994) that the ...
... variation in these resources, exotic species might be able to invade and coexist in species-rich communities. Invasions by exotic species are often studied and discussed as if they were a distinct ecological phenomenon (Elton 1958; Dukes & Mooney 1999). However, we concur with Huston (1994) that the ...
Lessons from primary succession for restoration of severely
... (Table 1). Such efforts, especially the use of fastgrowing ground cover, might help stabilize the surface but the introduction of species that produce dense swards or thickets often can make establishment of natives and development of subsequent stages difficult (see ‘Species interactions’). Revegeta ...
... (Table 1). Such efforts, especially the use of fastgrowing ground cover, might help stabilize the surface but the introduction of species that produce dense swards or thickets often can make establishment of natives and development of subsequent stages difficult (see ‘Species interactions’). Revegeta ...
Lessons from primary succession for restoration of severely
... (Table 1). Such efforts, especially the use of fastgrowing ground cover, might help stabilize the surface but the introduction of species that produce dense swards or thickets often can make establishment of natives and development of subsequent stages difficult (see ‘Species interactions’). Revegeta ...
... (Table 1). Such efforts, especially the use of fastgrowing ground cover, might help stabilize the surface but the introduction of species that produce dense swards or thickets often can make establishment of natives and development of subsequent stages difficult (see ‘Species interactions’). Revegeta ...
Marine Ecological Restoration - sfile.f
... Session I - Introduction: “Global Ocean Issues” special session (Chair: S. Netanyahu) - The ocean’s solution for human food needs (Steve Gaines) - Global marine monitoring: World’s largest marine park survey (Graham Edgar) - Brief introduction to Ocean Health Index (Ben Halpern – Video clip) Ses ...
... Session I - Introduction: “Global Ocean Issues” special session (Chair: S. Netanyahu) - The ocean’s solution for human food needs (Steve Gaines) - Global marine monitoring: World’s largest marine park survey (Graham Edgar) - Brief introduction to Ocean Health Index (Ben Halpern – Video clip) Ses ...
Marine seaweed invasions Josefin Sagerman Impacts and biotic resistance in native ecosystems
... Marine seaweed systems are among the most productive ecosystems on the planet (Mann 1973). They have a key function in nutrient cycling within temperate costal zones and as a habitat, seaweeds harbor a rich diversity of fauna and serve as a nursery for commercially important fish (Rangeley and Krame ...
... Marine seaweed systems are among the most productive ecosystems on the planet (Mann 1973). They have a key function in nutrient cycling within temperate costal zones and as a habitat, seaweeds harbor a rich diversity of fauna and serve as a nursery for commercially important fish (Rangeley and Krame ...
Rusty Crayfish
... Once introduced, they can spread quickly into new habitats as they are opportunistic feeders, and resistant to a wide range of water temperatures. Only one fertilized female is needed to start a new population, as they can transport 100-500 fertilized eggs under their tails. ...
... Once introduced, they can spread quickly into new habitats as they are opportunistic feeders, and resistant to a wide range of water temperatures. Only one fertilized female is needed to start a new population, as they can transport 100-500 fertilized eggs under their tails. ...
Can Nordic amphibians be saved?
... Amphibians are particularly threatened by the fragmentation and destruction of their habitat. Ponds and wetlands have widely been drained, filled in, or built over. If patches of suitable habitat become separated by longer distances, populations are no longer able to spread or interbreed. Small, iso ...
... Amphibians are particularly threatened by the fragmentation and destruction of their habitat. Ponds and wetlands have widely been drained, filled in, or built over. If patches of suitable habitat become separated by longer distances, populations are no longer able to spread or interbreed. Small, iso ...
New Zealand native butterflies
... Where land was cleared for farming, the southern blue has been displaced by the common blue. Larvae eat native broom, clovers and trefoils. If they run out of food, they can pupate successfully, resulting in a smaller adult. ...
... Where land was cleared for farming, the southern blue has been displaced by the common blue. Larvae eat native broom, clovers and trefoils. If they run out of food, they can pupate successfully, resulting in a smaller adult. ...
ecology of an invasive predator in hawaii
... effective control methods (Veitch 1985, Edwards et al. 2000). For example, disease data may help to understand the risk of transmission to other species, diet studies may yield information about formulating attractive baits, home range size and daily movements may inform trap placement and spacing, ...
... effective control methods (Veitch 1985, Edwards et al. 2000). For example, disease data may help to understand the risk of transmission to other species, diet studies may yield information about formulating attractive baits, home range size and daily movements may inform trap placement and spacing, ...
The Role of Ethical Judgments Related to Wildlife
... property damage, deer–vehicle collisions, the transmission of Lyme disease, and ecosystem damage (Conover 1997). These problems have been particularly difficult to address in urban and suburban communities where deer populations could grow quite large, but where deer hunting is often either impracti ...
... property damage, deer–vehicle collisions, the transmission of Lyme disease, and ecosystem damage (Conover 1997). These problems have been particularly difficult to address in urban and suburban communities where deer populations could grow quite large, but where deer hunting is often either impracti ...
Preview Sample 2
... a fisherman caught a northern snakehead fish in a pond in Crofton, Maryland (a suburb of Washington, DC). Snakeheads are a favorite food of immigrants from China, and live fish can frequently be found in Asian markets. It's suspected that the fish in the Crofton pond were purchased locally and then ...
... a fisherman caught a northern snakehead fish in a pond in Crofton, Maryland (a suburb of Washington, DC). Snakeheads are a favorite food of immigrants from China, and live fish can frequently be found in Asian markets. It's suspected that the fish in the Crofton pond were purchased locally and then ...
Multiple scale composition and spatial distribution patterns of the
... of the tree population, while accounting for 27% of the standing basal area. Black spruce, paper birch and larch, the three most abundant species, collectively accounted for 51% of the population and 38% of the basal area. 2 Eight physiographic zones were characterized by differences in glacial hist ...
... of the tree population, while accounting for 27% of the standing basal area. Black spruce, paper birch and larch, the three most abundant species, collectively accounted for 51% of the population and 38% of the basal area. 2 Eight physiographic zones were characterized by differences in glacial hist ...
3.14 Biological Resources
... Section 7 (interagency consultation) or Section 10(a) (incidental take permit) of ESA, depending on whether the federal government is involved in permitting or funding the project. The Section 7 authorization process is used to determine if a project with a federal nexus would jeopardize the continu ...
... Section 7 (interagency consultation) or Section 10(a) (incidental take permit) of ESA, depending on whether the federal government is involved in permitting or funding the project. The Section 7 authorization process is used to determine if a project with a federal nexus would jeopardize the continu ...
Phylogenetic limiting similarity and competitive exclusion
... realised species richness in communities containing species from a single family and higher realised richness in communities containing species from two or three different families. In a bacterial invasion experiment, Jiang et al. (2010) showed that the frequency of successful establishment of an al ...
... realised species richness in communities containing species from a single family and higher realised richness in communities containing species from two or three different families. In a bacterial invasion experiment, Jiang et al. (2010) showed that the frequency of successful establishment of an al ...
The Upper Great Lakes Plain
... Shrub-Forest: Golden-winged Warbler, Blue-winged Warbler, Black-billed Cuckoo, Yellow-billed Cuckoo, and White-eyed Vireo ........................................................................................................ 30 Population objectives and habitat strategies ......................... ...
... Shrub-Forest: Golden-winged Warbler, Blue-winged Warbler, Black-billed Cuckoo, Yellow-billed Cuckoo, and White-eyed Vireo ........................................................................................................ 30 Population objectives and habitat strategies ......................... ...
Ecosystem Integrity - Ecology and Society
... trials (and errors) of any kind can be made with the assurance that recovery is always possible once the source of disturbance is removed (Holling 1987). In reality, all natural ecological systems change over time, and it is extremely difficult to determine a normal state for communities whose measu ...
... trials (and errors) of any kind can be made with the assurance that recovery is always possible once the source of disturbance is removed (Holling 1987). In reality, all natural ecological systems change over time, and it is extremely difficult to determine a normal state for communities whose measu ...
Contrasts in Social Behavior between Central American Cichlid
... except for the observations made by us in Nicaragua (Noakes and Barlow, 1973). Within the juvenile and adult cichlids of Central America one finds almost all general feeding types. The most commonly occurring type is the omnivore. These fishes may eat Aufwuchs, plants, invertebrates, and fishes. Wit ...
... except for the observations made by us in Nicaragua (Noakes and Barlow, 1973). Within the juvenile and adult cichlids of Central America one finds almost all general feeding types. The most commonly occurring type is the omnivore. These fishes may eat Aufwuchs, plants, invertebrates, and fishes. Wit ...
Effects of cattle grazing on small mammal communities in the
... 2013). Small mammals feed on plants, fungi and insects, while provide food for many predators (Verts & Carraway, 1998), suggesting that effects of cattle grazing on small mammals can be further transferred to other trophic levels through trophic cascade. Sometimes, small mammals also act as efficien ...
... 2013). Small mammals feed on plants, fungi and insects, while provide food for many predators (Verts & Carraway, 1998), suggesting that effects of cattle grazing on small mammals can be further transferred to other trophic levels through trophic cascade. Sometimes, small mammals also act as efficien ...
Full text in pdf format
... Among the gelatinous species, carbon and nitrogen values were highest for Colobonema sericeum and Agmayeria tortugensis and lowest for Bathocyroe fosten and Poralia rufescens (Table 3). The elemental compositions of Sergestes arcticus and Serrivomer beanii were substantially greater than those of th ...
... Among the gelatinous species, carbon and nitrogen values were highest for Colobonema sericeum and Agmayeria tortugensis and lowest for Bathocyroe fosten and Poralia rufescens (Table 3). The elemental compositions of Sergestes arcticus and Serrivomer beanii were substantially greater than those of th ...
in Jaú National Park, Amazonas, Brazil
... the mean abundance of caiman species to be very low (1.0 ± 0.5 caiman/km of shoreline), independent of habitat type (river, stream or lake) and season. While abundance was almost equal, the species’ composition varied in different waterbody and study areas. We analysed the structure similarity of th ...
... the mean abundance of caiman species to be very low (1.0 ± 0.5 caiman/km of shoreline), independent of habitat type (river, stream or lake) and season. While abundance was almost equal, the species’ composition varied in different waterbody and study areas. We analysed the structure similarity of th ...
Chapter 3: Maryland`s Wildlife Resources and Species of Greatest
... Species of Greatest Conservation Need (GCN) This Wildlife Diversity Conservation Plan development process provided DNR the opportunity to identify species of wildlife in greatest need of conservation, as well as the key habitats that support them. Rather than focusing on a certain group or category ...
... Species of Greatest Conservation Need (GCN) This Wildlife Diversity Conservation Plan development process provided DNR the opportunity to identify species of wildlife in greatest need of conservation, as well as the key habitats that support them. Rather than focusing on a certain group or category ...
Island restoration
The ecological restoration of islands, or island restoration, is the application of the principles of ecological restoration to islands and island groups. Islands, due to their isolation, are home to many of the world's endemic species, as well as important breeding grounds for seabirds and some marine mammals. Their ecosystems are also very vulnerable to human disturbance and particularly to introduced species, due to their small size. Island groups such as New Zealand and Hawaii have undergone substantial extinctions and losses of habitat. Since the 1950s several organisations and government agencies around the world have worked to restore islands to their original states; New Zealand has used them to hold natural populations of species that would otherwise be unable to survive in the wild. The principal components of island restoration are the removal of introduced species and the reintroduction of native species.