Variability in population and community biomass in a grassland
... The idea that diversity begets stability has been prevalent in ecological literature for a long time (Odum 1953, Elton 1958). For example, the well-known Shannon Wiener index of diversity H? was introduced to ecology by MacArthur (1955) as an index of stability. The idea behind it was that, if there ...
... The idea that diversity begets stability has been prevalent in ecological literature for a long time (Odum 1953, Elton 1958). For example, the well-known Shannon Wiener index of diversity H? was introduced to ecology by MacArthur (1955) as an index of stability. The idea behind it was that, if there ...
Conservation genetics in New Zealand
... have no fluctuations in population size, equal numbers of each sex, and an equal reproductive success for every individual in the population. As real populations do not meet these 'ideal population' criteria, any population with an actual size of less than about a thousand individuals should be cons ...
... have no fluctuations in population size, equal numbers of each sex, and an equal reproductive success for every individual in the population. As real populations do not meet these 'ideal population' criteria, any population with an actual size of less than about a thousand individuals should be cons ...
THE OVERLAPPING BREEDING TERRITORIES OF SEVERAL
... feeding mostly on the amphipod Para calliope, which occurred abundantly in the Enteromorpha, and on smaller numbers of the isopod Isocladus. Two snails, Littorina unifasciara and Zeacumantus J'ubcarinatus, were also abundant on the platform but did not appear to be taken by the plovers. When the pla ...
... feeding mostly on the amphipod Para calliope, which occurred abundantly in the Enteromorpha, and on smaller numbers of the isopod Isocladus. Two snails, Littorina unifasciara and Zeacumantus J'ubcarinatus, were also abundant on the platform but did not appear to be taken by the plovers. When the pla ...
Saturation of biological diversity and human activity
... travels, human beings can transport various species in an intentional or unintentional way. As history shows, humans have introduced known and domesticated animals, as well as useful plants to new places. At the same time, humans would take with themselves the specimen of animals and plants purely f ...
... travels, human beings can transport various species in an intentional or unintentional way. As history shows, humans have introduced known and domesticated animals, as well as useful plants to new places. At the same time, humans would take with themselves the specimen of animals and plants purely f ...
Are Other Hominins (Hominoids) Alive Today?
... That the question of relict hominoid survival into the present would be ranked among this litany of puzzling matters central to current anthropological research is a significant, if implicit, acknowledgement of the role and conceptual framework of this journal and the research and exploration for wh ...
... That the question of relict hominoid survival into the present would be ranked among this litany of puzzling matters central to current anthropological research is a significant, if implicit, acknowledgement of the role and conceptual framework of this journal and the research and exploration for wh ...
The Coral Triangle as a net source of Indo
... centre of the Coral Triangle than those undergoing the latest establishments (paired t-test, t = ...
... centre of the Coral Triangle than those undergoing the latest establishments (paired t-test, t = ...
Practice Test Two Key
... identical feeding rates and conversion efficiencies, the one with the ( higher lower ) death rate will dominate. ...
... identical feeding rates and conversion efficiencies, the one with the ( higher lower ) death rate will dominate. ...
Fisher`s guide to New Zealand coastal seabirds
... throughout the North and South Islands but mainly in coastal areas in Northland, Auckland, Waikato, Bay of Plenty, Wairarapa, Nelson, Canterbury and Southland regions. Birds nest inland on islands and sandspits at Lake Rotorua and on Canterbury riverbeds. Breeding period: spring/summer, incubation i ...
... throughout the North and South Islands but mainly in coastal areas in Northland, Auckland, Waikato, Bay of Plenty, Wairarapa, Nelson, Canterbury and Southland regions. Birds nest inland on islands and sandspits at Lake Rotorua and on Canterbury riverbeds. Breeding period: spring/summer, incubation i ...
A fisher`s guide: New Zealand coastal seabirds
... throughout the North and South Islands but mainly in coastal areas in Northland, Auckland, Waikato, Bay of Plenty, Wairarapa, Nelson, Canterbury and Southland regions. Birds nest inland on islands and sandspits at Lake Rotorua and on Canterbury riverbeds. Breeding period: spring/summer, incubation i ...
... throughout the North and South Islands but mainly in coastal areas in Northland, Auckland, Waikato, Bay of Plenty, Wairarapa, Nelson, Canterbury and Southland regions. Birds nest inland on islands and sandspits at Lake Rotorua and on Canterbury riverbeds. Breeding period: spring/summer, incubation i ...
Global Exchange and Accumulation of Non
... of naturalized species with area (Fig. 2). Therefore, our data provide the first global test illustrating that oceanic islands harbour more naturalized alien plants than similarly sized mainland regions, a phenomenon that is attributed to the available niche space not being saturated by native speci ...
... of naturalized species with area (Fig. 2). Therefore, our data provide the first global test illustrating that oceanic islands harbour more naturalized alien plants than similarly sized mainland regions, a phenomenon that is attributed to the available niche space not being saturated by native speci ...
Trophic niche partitioning between two native and two exotic
... fox, Vulpes vulpes, and stone marten, Martes foina, and compared it with the diet of that two introduced species. The choice of these two native carnivores, within the local community of carnivores (Santos-Reis et al. 1999), can be justified by the fact that they are the ones that most likely would ...
... fox, Vulpes vulpes, and stone marten, Martes foina, and compared it with the diet of that two introduced species. The choice of these two native carnivores, within the local community of carnivores (Santos-Reis et al. 1999), can be justified by the fact that they are the ones that most likely would ...
Plant Collection Guidelines for Wildcrafters
... rooted shoots without seriously damaging the parent. Plants with bulbs or corms are much more sensitive to collection of rooted specimens, because it is often necessary to remove the entire plant to get a viable shoot. Aboriginal communities, who have collected bulbs from the same populations fo ...
... rooted shoots without seriously damaging the parent. Plants with bulbs or corms are much more sensitive to collection of rooted specimens, because it is often necessary to remove the entire plant to get a viable shoot. Aboriginal communities, who have collected bulbs from the same populations fo ...
Pygathrix nemaeus, Pygathrix nigripes, Pygathrix cinereus
... conservation and protected area activities for grey- and redshanked doucs. WWF is also working with Canon, the Cuc Phuong Endangered Primate Rescue Centre and Vietnam Television to produce a series of films on the douc to raise the public awareness about the species and seek more support for conserv ...
... conservation and protected area activities for grey- and redshanked doucs. WWF is also working with Canon, the Cuc Phuong Endangered Primate Rescue Centre and Vietnam Television to produce a series of films on the douc to raise the public awareness about the species and seek more support for conserv ...
Biological Indicators A
... numbers of species designated “at risk” nationally is likely greatly underestimated, however, as these numbers represent only the handful of species that have so far been reviewed. The Committee on the Status of Species at Risk in Ontario (COSSARO) evaluates species in Ontario, with the Ministry of ...
... numbers of species designated “at risk” nationally is likely greatly underestimated, however, as these numbers represent only the handful of species that have so far been reviewed. The Committee on the Status of Species at Risk in Ontario (COSSARO) evaluates species in Ontario, with the Ministry of ...
S33-4 Extinction by hybridization and introgression in anatine ducks
... their indigenous species (Mazourek and Gray, 1994). Another example is the endangered Hawaiian duck (A. wyvilliana) or koloa, which is threatened by hybridization with released mallards such that the population on Kauai is now the only one remaining unimplicated in a hybrid swarm (Rhymer, 2001). In ...
... their indigenous species (Mazourek and Gray, 1994). Another example is the endangered Hawaiian duck (A. wyvilliana) or koloa, which is threatened by hybridization with released mallards such that the population on Kauai is now the only one remaining unimplicated in a hybrid swarm (Rhymer, 2001). In ...
stopover on a gulf coast barrier island by spring trans
... of migrants occurred from mid-April through early May 1987. Males of several species arrived earlier than females, suggestingthat females initiated spring migration later. When migrants stopped on Horn Island they used Scrub/Shrub, Pine Forest, and Relic Dune habitats more than expected if they were ...
... of migrants occurred from mid-April through early May 1987. Males of several species arrived earlier than females, suggestingthat females initiated spring migration later. When migrants stopped on Horn Island they used Scrub/Shrub, Pine Forest, and Relic Dune habitats more than expected if they were ...
Gibraltar Rock Fauna - Dubbo Field Nats Home
... Superb Parrot is noted to feed on fruits, blossoms and seeds of acacias, eucalypts and mistletoes; in grain crops, stubble and pastures and seeds of various grasses. Feed resources are therefore abundant in and around the survey area. ...
... Superb Parrot is noted to feed on fruits, blossoms and seeds of acacias, eucalypts and mistletoes; in grain crops, stubble and pastures and seeds of various grasses. Feed resources are therefore abundant in and around the survey area. ...
Threatened species of the Northern Territory
... specimen from Alexandria appears to be anomalous, in that the Barkly Tablelands does not appear to be suitable habitat. However, no detail was given of the habitat in which it was found there, and the locality may be very imprecise. Its diet comprises mostly invertebrates, but it may also take small ...
... specimen from Alexandria appears to be anomalous, in that the Barkly Tablelands does not appear to be suitable habitat. However, no detail was given of the habitat in which it was found there, and the locality may be very imprecise. Its diet comprises mostly invertebrates, but it may also take small ...
UNIT B Notes Bio20-2
... There are gradual transitions between biomes boundaries resulting in a gradual change in the composition of plants and animals ...
... There are gradual transitions between biomes boundaries resulting in a gradual change in the composition of plants and animals ...
Evolution of stabilising weak links in food webs
... [5]McCann, K Hastings, A and Huxel, GR Weak trophic interactions and the balance of nature Nature 395 794 (1998) [6] Pimm S. L. The complexity and stability of ecosystems, Nature 307:321-325, 1984. [7]Lotka A.J. Elements of Mathematical Biology, 1925. Volterra V. Fluctuations in the Abundance of Spe ...
... [5]McCann, K Hastings, A and Huxel, GR Weak trophic interactions and the balance of nature Nature 395 794 (1998) [6] Pimm S. L. The complexity and stability of ecosystems, Nature 307:321-325, 1984. [7]Lotka A.J. Elements of Mathematical Biology, 1925. Volterra V. Fluctuations in the Abundance of Spe ...
Ants of Fraser Island
... remaining 2/3rds there was only Coastal Brown Ants and not one native ant species present. Scientific research from other parts of the world suggest that many other invertebrate groups, such as spiders, beetles, cockroaches, etc will also be severely affected by this infestation. Further investigati ...
... remaining 2/3rds there was only Coastal Brown Ants and not one native ant species present. Scientific research from other parts of the world suggest that many other invertebrate groups, such as spiders, beetles, cockroaches, etc will also be severely affected by this infestation. Further investigati ...
Biodiversity - Jean-Francois Le Galliard
... Growing awareness of biodiversity in public policies: emergence of new concepts Earth Summit in Rio (1992) • 168 countries signed a strategy for “sustainable development” • the strategy included three components, namely (1) the conservation of biological diversity, (2) the sustainable use of its el ...
... Growing awareness of biodiversity in public policies: emergence of new concepts Earth Summit in Rio (1992) • 168 countries signed a strategy for “sustainable development” • the strategy included three components, namely (1) the conservation of biological diversity, (2) the sustainable use of its el ...
Loss of Diversity as a Consequence of Habitat Destruction in
... 1988). As human populations grow at ever-accelerating rates, an increasing proportion of the land which supports ecological communities is converted for agriculture, urban development, or other human activities. The degree to which habitat loss translates into biodiversity loss (i.e., loss of specie ...
... 1988). As human populations grow at ever-accelerating rates, an increasing proportion of the land which supports ecological communities is converted for agriculture, urban development, or other human activities. The degree to which habitat loss translates into biodiversity loss (i.e., loss of specie ...
Acclimation of Intertidal Crabs Duke University Marine Laboratory
... SVXOPSIS. Intertidal crabs are subjected to marked fluctuations in environmental factors. Temperature and salinity influence the distribution of organisms both on a latitudinal basis and along a subtidal to terrestrial gradient. These factors are operative on all stages of the life history. Resistan ...
... SVXOPSIS. Intertidal crabs are subjected to marked fluctuations in environmental factors. Temperature and salinity influence the distribution of organisms both on a latitudinal basis and along a subtidal to terrestrial gradient. These factors are operative on all stages of the life history. Resistan ...
EDIBLE FOREST TOUR - The Living Rainforest
... West Africa. It has been called a bush meat crisis by some, and has increased drastically, now causing concern for species which were previously not at risk. This is largely due to an increase in commercial logging, with added infrastructure of roads and improved transport links from forests and hun ...
... West Africa. It has been called a bush meat crisis by some, and has increased drastically, now causing concern for species which were previously not at risk. This is largely due to an increase in commercial logging, with added infrastructure of roads and improved transport links from forests and hun ...
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.