A Survey and Overview of Habitat Fragmentation Experiments
... Following from the theory of island biogeography (MacArthur & Wilson 1967), species richness in habitat fragments is expected to be a function of island size and degree of isolation. Smaller, more isolated fragments are expected to retain fewer species than larger, less isolated habitat tracts (Diam ...
... Following from the theory of island biogeography (MacArthur & Wilson 1967), species richness in habitat fragments is expected to be a function of island size and degree of isolation. Smaller, more isolated fragments are expected to retain fewer species than larger, less isolated habitat tracts (Diam ...
FOOD WEBS
... The hypothesis that stability begets complexity corresponds to the naturalist's intuition about the "balance of nature" (Pimm 1991). Perhaps for this reason, the stability-complexity hypothesis was accepted uncritically until the early 1970s, beginning with the publication of a brief, but important, ...
... The hypothesis that stability begets complexity corresponds to the naturalist's intuition about the "balance of nature" (Pimm 1991). Perhaps for this reason, the stability-complexity hypothesis was accepted uncritically until the early 1970s, beginning with the publication of a brief, but important, ...
Diversity and Distribution of Spiders in Southwestern Nigeria
... which may serves as host plant for different insect, thus invite more preys to this habitat. It conforms to the study of Marshall [2] that showed that provide an important service of keeping insect populations under control in a diverse plant environment. The highest spider diversity recorded in cul ...
... which may serves as host plant for different insect, thus invite more preys to this habitat. It conforms to the study of Marshall [2] that showed that provide an important service of keeping insect populations under control in a diverse plant environment. The highest spider diversity recorded in cul ...
BIOLOGICAL ENVIRONMENT REPORT
... The most extensive vegetation community in the region is open forest dominated by Eucalyptus tetrodonta (Darwin stringybark) and E. miniata (Darwin woollybutt) with an understorey of perennial and annual grasses (NRETA 2006). Wilson et al. (1990) provides more detail on the broadscale distribution o ...
... The most extensive vegetation community in the region is open forest dominated by Eucalyptus tetrodonta (Darwin stringybark) and E. miniata (Darwin woollybutt) with an understorey of perennial and annual grasses (NRETA 2006). Wilson et al. (1990) provides more detail on the broadscale distribution o ...
Confounding factors in the detection of species responses to habitat
... The magnitude of habitat fragmentation reflects the pervasive influence of humans on the environment at all scales from local (Lord & Norton, 1990) through to regional (Ranta et al., 1998), national (Heilman et al., 2002) and global (Riitters et al., 2000). While the direct effects of habitat loss per ...
... The magnitude of habitat fragmentation reflects the pervasive influence of humans on the environment at all scales from local (Lord & Norton, 1990) through to regional (Ranta et al., 1998), national (Heilman et al., 2002) and global (Riitters et al., 2000). While the direct effects of habitat loss per ...
global strategy on invasive alien species
... 1. Global trade has enabled modern societies to benefit from the unprecedented movement and establishment of species around the world. Agriculture, forestry, fisheries, the pet trade, the horticultural industry, and many industrial consumers of raw materials today depend on species that are native t ...
... 1. Global trade has enabled modern societies to benefit from the unprecedented movement and establishment of species around the world. Agriculture, forestry, fisheries, the pet trade, the horticultural industry, and many industrial consumers of raw materials today depend on species that are native t ...
2009rat
... diameter each ca. 30 cm), with a cotton cloth attached to the bottom of the bucket, in Kahanahaiki forest. Forty-eight seed buckets were partitioned equally among 12 plots (each 15 x 15 m) that were previously established in Kahanahaiki gulch. The four buckets per plot were placed without regard to ...
... diameter each ca. 30 cm), with a cotton cloth attached to the bottom of the bucket, in Kahanahaiki forest. Forty-eight seed buckets were partitioned equally among 12 plots (each 15 x 15 m) that were previously established in Kahanahaiki gulch. The four buckets per plot were placed without regard to ...
Where The Wild Extinctions Are
... CREO has established very clear criteria for declaring a species extinct, not extinct, or unresolved. The criteria include precise definitions for such things as adequate taxonomy (including DNA comparisons if available), sufficient hypodigm (actual specimens of the species), and adequate surveying ...
... CREO has established very clear criteria for declaring a species extinct, not extinct, or unresolved. The criteria include precise definitions for such things as adequate taxonomy (including DNA comparisons if available), sufficient hypodigm (actual specimens of the species), and adequate surveying ...
spatial habitat heterogeneity influences competition
... (e.g., Levin 1974, Barkai and McQuaid 1988). At the other extreme, patches may differ qualitatively from one another, and variation in habitat selection among species can reduce the probability of competitive exclusion (e.g., Schoener 1974). Structurally homogeneous habitats may consist of a mosaic ...
... (e.g., Levin 1974, Barkai and McQuaid 1988). At the other extreme, patches may differ qualitatively from one another, and variation in habitat selection among species can reduce the probability of competitive exclusion (e.g., Schoener 1974). Structurally homogeneous habitats may consist of a mosaic ...
Lake Manager`s Handbook: Alien Invaders
... Most of our aquatic habitats have been extensively modified by a large number of alien invaders, to the extent that totally indigenous lakes are now rare. Some alien species are regarded as pests because of the problems they create, but others are regarded as valuable biological resources (for exam ...
... Most of our aquatic habitats have been extensively modified by a large number of alien invaders, to the extent that totally indigenous lakes are now rare. Some alien species are regarded as pests because of the problems they create, but others are regarded as valuable biological resources (for exam ...
Do aquatic macrophytes co-occur randomly? An analysis of null
... always give similar results (Gotelli 2000). If communities are structured by competition and/or habitat segregation among species, then the C-Score and Checker indices should be higher than expected by chance. However, when their values are lower than expected by chance, facilitation or environmenta ...
... always give similar results (Gotelli 2000). If communities are structured by competition and/or habitat segregation among species, then the C-Score and Checker indices should be higher than expected by chance. However, when their values are lower than expected by chance, facilitation or environmenta ...
Species Coexistence and Pathogens with
... the pathogen always persisted, provided that at least one host was present. Additional simulations indicated that the qualitative aspects of the phase diagrams (i.e., general positions and types of equilibria) did not change for different magnitudes of the coexistence inequalities. If host 2 could n ...
... the pathogen always persisted, provided that at least one host was present. Additional simulations indicated that the qualitative aspects of the phase diagrams (i.e., general positions and types of equilibria) did not change for different magnitudes of the coexistence inequalities. If host 2 could n ...
Arid and semi-arid lakes
... and use associated with temporary arid and semi-arid zone freshwater lakes than with arid and semi-arid salt lakes. The site recorded within arid and semi-arid salt lake areas (such as hearths and stone scatters), are indicative of temporary occupation, whereas sites found within arid and semi-arid ...
... and use associated with temporary arid and semi-arid zone freshwater lakes than with arid and semi-arid salt lakes. The site recorded within arid and semi-arid salt lake areas (such as hearths and stone scatters), are indicative of temporary occupation, whereas sites found within arid and semi-arid ...
Can the invasive European rabbit (Oryctolagus
... blocks. As such, the design is pseudo-replicated and hence interpretation of the effects of ecosystem engineers should not be generalised beyond the study site. However, home range analysis of bilbies and bettongs suggests that these sites are independent with respect to treatment effects (Moseby an ...
... blocks. As such, the design is pseudo-replicated and hence interpretation of the effects of ecosystem engineers should not be generalised beyond the study site. However, home range analysis of bilbies and bettongs suggests that these sites are independent with respect to treatment effects (Moseby an ...
Biotic interactions and speciation in the tropics
... Dobzhansky (1950) and Fischer (1960) both suggested that density independent mortality caused by a harsh climate plays a greater role in temperate than tropical environments, and that biotic interactions constitute the primary selective pressures in the tropics. Furthermore, they proposed that this ...
... Dobzhansky (1950) and Fischer (1960) both suggested that density independent mortality caused by a harsh climate plays a greater role in temperate than tropical environments, and that biotic interactions constitute the primary selective pressures in the tropics. Furthermore, they proposed that this ...
Nearshore fish assemblages associated with introduced predatory
... with one or two introduced predatory fish species (but not in lakes with three or more predators) compared with lakes with fewer predatory species. Given the context‐dependence of predator richness effects on prey (Schmitz, 2007), the uncertainty in predicting outcomes of fish species interactions (Le ...
... with one or two introduced predatory fish species (but not in lakes with three or more predators) compared with lakes with fewer predatory species. Given the context‐dependence of predator richness effects on prey (Schmitz, 2007), the uncertainty in predicting outcomes of fish species interactions (Le ...
Mugger Crocodile Crocodylus palustris
... 9. Sustainable use schemes, eco-tourism: Placing a value on crocodiles is a proven technique for gaining acceptance of them from local people. Eco-tourism could potentially bring in additional income to local communities, and provided economic incentives for people to be more tolerant of crocodiles. ...
... 9. Sustainable use schemes, eco-tourism: Placing a value on crocodiles is a proven technique for gaining acceptance of them from local people. Eco-tourism could potentially bring in additional income to local communities, and provided economic incentives for people to be more tolerant of crocodiles. ...
Ecosystem Health of Large Lakes - Great Lakes Fishery Commission
... its emphasis on the patient and only secondarily considers illness as an expression of the patient’s environment. These approaches are not necessarily in conflict, and may only indicate the newness of the ecosystem health concept and our ability to objectify and measure it. But all three approaches ...
... its emphasis on the patient and only secondarily considers illness as an expression of the patient’s environment. These approaches are not necessarily in conflict, and may only indicate the newness of the ecosystem health concept and our ability to objectify and measure it. But all three approaches ...
Download technical report 191
... of invasive plant and animal species on lands managed by the University of Hawai‘i on Maunakea. The development and implementation of this plan supports the Office of Mauna Kea Management mission to achieve harmony, balance, and trust in the sustainable management and stewardship of UH managed l ...
... of invasive plant and animal species on lands managed by the University of Hawai‘i on Maunakea. The development and implementation of this plan supports the Office of Mauna Kea Management mission to achieve harmony, balance, and trust in the sustainable management and stewardship of UH managed l ...
Nevada Wildlife Action Plan - Nevada Department of Wildlife
... Value to Wildlife Intermountain Cold Desert Shrub is the most important habitat in Nevada for several Species of Conservation Priority, including pale kangaroo mouse and Loggerhead Shrike. Soils of this habitat tend to be loose and either sandy or gravelly and are often easy to dig. Blow sand tends ...
... Value to Wildlife Intermountain Cold Desert Shrub is the most important habitat in Nevada for several Species of Conservation Priority, including pale kangaroo mouse and Loggerhead Shrike. Soils of this habitat tend to be loose and either sandy or gravelly and are often easy to dig. Blow sand tends ...
The Mountain Zebra is Dropping in Population
... Their offspring cycle occurs the young mountain zebras are called foals. New born foals weight up to 55 pounds at birth. (Mares) females normally give birth to their first foal when they are between three and years of. Normally they then give birth to one foal every one to three years until there ar ...
... Their offspring cycle occurs the young mountain zebras are called foals. New born foals weight up to 55 pounds at birth. (Mares) females normally give birth to their first foal when they are between three and years of. Normally they then give birth to one foal every one to three years until there ar ...
Entomology in Ecuador - Horizon documentation-IRD
... anthropogenic changes are still incompletely known. The wide diversity of habitats that Ecuador possesses in a small area makes it an ideal location for biodiversity, ecological and evolutionary research. Although the ...
... anthropogenic changes are still incompletely known. The wide diversity of habitats that Ecuador possesses in a small area makes it an ideal location for biodiversity, ecological and evolutionary research. Although the ...
What controls who is where in freshwater fish communities — the
... Several studies have recently examined the question of whether fish communities demonstrate concordance with other ecological communities. If two or more communities based on different taxonomic groups show concordant patterns across a range of sites, one can be more confident that the patterns are ...
... Several studies have recently examined the question of whether fish communities demonstrate concordance with other ecological communities. If two or more communities based on different taxonomic groups show concordant patterns across a range of sites, one can be more confident that the patterns are ...
Opens external link in new window
... International Feed Industry Federation), Ian McConnel (World Wide Fund for Nature, in LEAP since Jan 2015), Paul Melville (Government of New Zealand), Paul McKiernan (Government of Ireland), Frank Mitloehner (University of California, Davis, The International Feed Industry Federation, 2013 LEAP Chai ...
... International Feed Industry Federation), Ian McConnel (World Wide Fund for Nature, in LEAP since Jan 2015), Paul Melville (Government of New Zealand), Paul McKiernan (Government of Ireland), Frank Mitloehner (University of California, Davis, The International Feed Industry Federation, 2013 LEAP Chai ...
Biodiversity action plan
This article is about a conservation biology topic. For other uses of BAP, see BAP (disambiguation).A biodiversity action plan (BAP) is an internationally recognized program addressing threatened species and habitats and is designed to protect and restore biological systems. The original impetus for these plans derives from the 1992 Convention on Biological Diversity (CBD). As of 2009, 191 countries have ratified the CBD, but only a fraction of these have developed substantive BAP documents.The principal elements of a BAP typically include: (a) preparing inventories of biological information for selected species or habitats; (b) assessing the conservation status of species within specified ecosystems; (c) creation of targets for conservation and restoration; and (d) establishing budgets, timelines and institutional partnerships for implementing the BAP.