Chaos in Multi-Trophic Food Webs
... data points from being returned. We found that the most accurate method for doing this in Matlab was the “lowess” method, which is a weighted local regression using a 1st degree polynomial model. To avoid erroneous data, different spans for the weighted average calculations had to be used for variou ...
... data points from being returned. We found that the most accurate method for doing this in Matlab was the “lowess” method, which is a weighted local regression using a 1st degree polynomial model. To avoid erroneous data, different spans for the weighted average calculations had to be used for variou ...
dividends_from_diversity_lesson-new
... are different in different parts of the world, and in different habitats (e.g., grassland vs. forest). For example, several “biodiversity hotspots” have been identified throughout the world, such as many areas near the equator. This is known is the “latitudinal diversity gradient,” where areas of lo ...
... are different in different parts of the world, and in different habitats (e.g., grassland vs. forest). For example, several “biodiversity hotspots” have been identified throughout the world, such as many areas near the equator. This is known is the “latitudinal diversity gradient,” where areas of lo ...
ImprovIng the effectIveness and effIcIency
... imperiled species from harm, Defenders believes that government agencies should adopt a precautionary approach for the species. Wildlife agencies, however, should be more innovative and take reasonable, responsible risks when experimenting with novel approaches to recovering species. Particularly wi ...
... imperiled species from harm, Defenders believes that government agencies should adopt a precautionary approach for the species. Wildlife agencies, however, should be more innovative and take reasonable, responsible risks when experimenting with novel approaches to recovering species. Particularly wi ...
33. Feral goat removal to restore habitat quality within Malleefowl
... sampling for abundance of Malleefowl food items. In the first instance although the authors reported significant weight gains in their surviving birds this appears to be skewed by three of the 12 birds released. These birds nearly doubled their mass, whereas many of the other birds made almost incon ...
... sampling for abundance of Malleefowl food items. In the first instance although the authors reported significant weight gains in their surviving birds this appears to be skewed by three of the 12 birds released. These birds nearly doubled their mass, whereas many of the other birds made almost incon ...
Biodiversity hotspots: hot for what?
... with 70% loss of primary vegetation) (Myers et al., 2000) is being promoted by the U.S.-based nongovernment organization, Conservation International (hereafter CI) as a ‘silver bullet’ strategy for conserving most species for least cost. The approach has been endorsed by eminent American ecologists ...
... with 70% loss of primary vegetation) (Myers et al., 2000) is being promoted by the U.S.-based nongovernment organization, Conservation International (hereafter CI) as a ‘silver bullet’ strategy for conserving most species for least cost. The approach has been endorsed by eminent American ecologists ...
Ecological and Evolutionary Limits to Species Geographic Ranges.
... ethical reasons, transplant studies beyond range boundaries have been rare (Sexton et al. 2009). Another approach is to construct species distribution models (SDMs), also known as niche models, to assess whether a species is absent from large areas of apparently suitable habitat, suggesting dispersa ...
... ethical reasons, transplant studies beyond range boundaries have been rare (Sexton et al. 2009). Another approach is to construct species distribution models (SDMs), also known as niche models, to assess whether a species is absent from large areas of apparently suitable habitat, suggesting dispersa ...
ipm for invasive species - the County of Santa Clara
... Conventional techniques for control of invasive animals include fencing, trapping, poisoning and shooting. There has been some community concern for the welfare of invasive animals and it is now generally accepted that any pest control program must be humane and must have minimal impact on non- targ ...
... Conventional techniques for control of invasive animals include fencing, trapping, poisoning and shooting. There has been some community concern for the welfare of invasive animals and it is now generally accepted that any pest control program must be humane and must have minimal impact on non- targ ...
Trophic niches of thirteen damselfishes (Pomacentridae) at the
... 2002; Gobler et al. 2006; Ceccarelli 2007). Damselfishes have also served as a model fish for the study of planktivory. For example, the impacts of ecological factors like rank within social groups (Coates 1980), zooplankton dynamics (Noda et al. 1992) and current speeds (Mann and Sancho 2007) on th ...
... 2002; Gobler et al. 2006; Ceccarelli 2007). Damselfishes have also served as a model fish for the study of planktivory. For example, the impacts of ecological factors like rank within social groups (Coates 1980), zooplankton dynamics (Noda et al. 1992) and current speeds (Mann and Sancho 2007) on th ...
Introduction pathways and establishment rates of invasive aquatic
... of freshwater invasions, the tens rule has been mostly evaluated for terrestrial plants, birds, and biocontrol insects (Williamson 1996; Kolar and Lodge 2001; Lockwood et al. 2001). Although the tens rule is a rule of thumb, there are previous formal tests of the rule (Lockwood et al. 2001), and the ...
... of freshwater invasions, the tens rule has been mostly evaluated for terrestrial plants, birds, and biocontrol insects (Williamson 1996; Kolar and Lodge 2001; Lockwood et al. 2001). Although the tens rule is a rule of thumb, there are previous formal tests of the rule (Lockwood et al. 2001), and the ...
Non-native species in UK Overseas Territories: a review
... Territory, the ecological effects they have or may have, their current and potential distribution, the significance of the native species and habitats that non-natives are affecting, and the likelihood of successful control and any control attempts. This information, derived from published literatur ...
... Territory, the ecological effects they have or may have, their current and potential distribution, the significance of the native species and habitats that non-natives are affecting, and the likelihood of successful control and any control attempts. This information, derived from published literatur ...
Domestic Ferret
... irresponsible pet owners. If this were to happen, ferrets would become an invasive species, which mean that they would negatively affect the ecosystem by competing with native species for resources and habitats. What should you know about them? ...
... irresponsible pet owners. If this were to happen, ferrets would become an invasive species, which mean that they would negatively affect the ecosystem by competing with native species for resources and habitats. What should you know about them? ...
JNCC Report No. 372 Non-native species in UK Overseas Territories:
... Territory, the ecological effects they have or may have, their current and potential distribution, the significance of the native species and habitats that non-natives are affecting, and the likelihood of successful control and any control attempts. This information, derived from published literatur ...
... Territory, the ecological effects they have or may have, their current and potential distribution, the significance of the native species and habitats that non-natives are affecting, and the likelihood of successful control and any control attempts. This information, derived from published literatur ...
Changes in functional biodiversity in an invaded freshwater
... diversity, measured as the diversity of taxa distribution among functional groupings, revealed a significant increase between 1994/1996 and 2000/2001 because those species that were over-represented during the former period reached more equilibrated densities during the latter. The major, indirect im ...
... diversity, measured as the diversity of taxa distribution among functional groupings, revealed a significant increase between 1994/1996 and 2000/2001 because those species that were over-represented during the former period reached more equilibrated densities during the latter. The major, indirect im ...
Relationship between evenness and body size in species rich
... in cases where larger bodied taxa are disadvantaged, for example in polluted or disturbed localities. Indeed, the ABC (abundance/biomass comparison) method [27] of community assessment argues that stressed communities can be identified by a shift in the rank abundance plots of numerical abundance re ...
... in cases where larger bodied taxa are disadvantaged, for example in polluted or disturbed localities. Indeed, the ABC (abundance/biomass comparison) method [27] of community assessment argues that stressed communities can be identified by a shift in the rank abundance plots of numerical abundance re ...
Habitat subdivision causes changes in food web structure
... energy requirements) and diet specialization make species rare and susceptible to extinction; this suggestion is in agreement with modelling of food chains (Sterner et al. 1997), and omnivory (feeding on more than one species), which may also allow species at higher trophic levels to persist (McCann ...
... energy requirements) and diet specialization make species rare and susceptible to extinction; this suggestion is in agreement with modelling of food chains (Sterner et al. 1997), and omnivory (feeding on more than one species), which may also allow species at higher trophic levels to persist (McCann ...
(Hg) Concentrations in the Blacktip Shark
... and juvenile sharks that parent female sharks likely pass on high levels of (Hg) through the maternal fluid exchange (Adams et al. 2003). A study should be done to conclude the lifetime fluctuations in (Hg) levels in relation to growing sharks or fish. A few of the studies done found that several sp ...
... and juvenile sharks that parent female sharks likely pass on high levels of (Hg) through the maternal fluid exchange (Adams et al. 2003). A study should be done to conclude the lifetime fluctuations in (Hg) levels in relation to growing sharks or fish. A few of the studies done found that several sp ...
EPBC Act Site Access Report - NT EPA
... The following species and ecological communities have not been mapped and do not appear in reports produced from this database: - threatened species listed as extinct or considered as vagrants - some species and ecological communities that have only recently been listed - some terrestrial species th ...
... The following species and ecological communities have not been mapped and do not appear in reports produced from this database: - threatened species listed as extinct or considered as vagrants - some species and ecological communities that have only recently been listed - some terrestrial species th ...
Multiple Species Grazing In Oklahoma
... • Step – Point Transect As you walk through the area to be studied, stop every fifth step and record the type of plant nearest the toe of your boot, grass, legume, sedge, or forb. • Comparing composition records over time for a given area will allow you to determine changes and adjust stocking ratio ...
... • Step – Point Transect As you walk through the area to be studied, stop every fifth step and record the type of plant nearest the toe of your boot, grass, legume, sedge, or forb. • Comparing composition records over time for a given area will allow you to determine changes and adjust stocking ratio ...
1 Breeding Phenology of an Amphibian Community in a Mediterranean Area
... autumn, which coincided with the precipitation peak at the end of summer. The reproductive effort of P. punctatus and H. meridionalis differed between the two breeding periods (F1, 58 = 24.5416; p < 0.001 and F1, 58 = 15.8515; p = 0.0011 respectively), with a higher reproductive effort in spring tha ...
... autumn, which coincided with the precipitation peak at the end of summer. The reproductive effort of P. punctatus and H. meridionalis differed between the two breeding periods (F1, 58 = 24.5416; p < 0.001 and F1, 58 = 15.8515; p = 0.0011 respectively), with a higher reproductive effort in spring tha ...
Unit: BIODIVERSITY (Reading material exclusively for students of
... From a study of the history of life on earth through fossil records, we learn that large-scale loss of species like the one we are currently witnessing have also happened earlier, even before humans appeared on the scene. During the long period (> 3 billion years) since the origin and diversificatio ...
... From a study of the history of life on earth through fossil records, we learn that large-scale loss of species like the one we are currently witnessing have also happened earlier, even before humans appeared on the scene. During the long period (> 3 billion years) since the origin and diversificatio ...
Lesson 5: BIoDIVeRsITY oF THe RInG oF DARHAD
... things are connected. When one species is removed from an ecosystem, those areas with greater biodiversity are more likely to succeed. Cold northern ecosystems tend to be naturally less diverse than tropical ecosystems. Some scientists suspect that northern ecosystems will be less resilient in the f ...
... things are connected. When one species is removed from an ecosystem, those areas with greater biodiversity are more likely to succeed. Cold northern ecosystems tend to be naturally less diverse than tropical ecosystems. Some scientists suspect that northern ecosystems will be less resilient in the f ...
Herb layer dynamics of primeval fir
... 57 herb species were found in both reserves. Only 19 of these common species occurred at more than 50 % of plots in one reserve (Actaea spicata, Athyrium filix-femina, Dentaria bulbifera, Dryopteris dilatata, Dryopteris filix-mas, Galeobdolon luteum, Galium odoratum, Geranium robertianum, Impatiens ...
... 57 herb species were found in both reserves. Only 19 of these common species occurred at more than 50 % of plots in one reserve (Actaea spicata, Athyrium filix-femina, Dentaria bulbifera, Dryopteris dilatata, Dryopteris filix-mas, Galeobdolon luteum, Galium odoratum, Geranium robertianum, Impatiens ...
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.