The American Alligator: An Indicator Species for Everglades
... transformed by drainage and impoundment. Thus in many areas where alligators once existed, they have disappeared or are only present in permanent water bodies (canals, ponds) or during periods of extremely high water. Water depth and duration also affect health of alligators by impacting their food ...
... transformed by drainage and impoundment. Thus in many areas where alligators once existed, they have disappeared or are only present in permanent water bodies (canals, ponds) or during periods of extremely high water. Water depth and duration also affect health of alligators by impacting their food ...
wildlife matters - Australian Wildlife Conservancy
... Welcome to our Summer edition of Wildlife Matters. It is hard to imagine there can be a higher priority in Australia than finding an effective set of strategies to reduce the impact of feral cats and ultimately remove them from our landscapes. Killing an estimated 75 million native animals every nig ...
... Welcome to our Summer edition of Wildlife Matters. It is hard to imagine there can be a higher priority in Australia than finding an effective set of strategies to reduce the impact of feral cats and ultimately remove them from our landscapes. Killing an estimated 75 million native animals every nig ...
Effects of pigs in Hawaii - Lake Forest College
... forests is fencing and removal of feral pigs, along with the removal of other nonnative ungulates (e.g., feral cattle, deer, and goats) and plants where needed. Despite the need for conservation and restoration of these forests, there is little information on patterns of native plant recovery or the ...
... forests is fencing and removal of feral pigs, along with the removal of other nonnative ungulates (e.g., feral cattle, deer, and goats) and plants where needed. Despite the need for conservation and restoration of these forests, there is little information on patterns of native plant recovery or the ...
biodiversity loss and ecosystem functioning
... al. 1996, Wellnitz and Poff 2001). This is particularly important when testing redundancy or biological insurance hypotheses, as a wide range of contexts must be explored to even begin to determine whether a species is ecologically ‘‘redundant’’ (Yachi and Loreau 1999, Crowe, in press). Research int ...
... al. 1996, Wellnitz and Poff 2001). This is particularly important when testing redundancy or biological insurance hypotheses, as a wide range of contexts must be explored to even begin to determine whether a species is ecologically ‘‘redundant’’ (Yachi and Loreau 1999, Crowe, in press). Research int ...
Preston et al. 2012 comm invasions
... While many invasion biology studies focus on interactions between a single invader and a single native species, there is a growing need to address the net consequences of multiple invasions within a community context (Olden and Poff 2003). Continued homogenization of the planet’s biota has increased ...
... While many invasion biology studies focus on interactions between a single invader and a single native species, there is a growing need to address the net consequences of multiple invasions within a community context (Olden and Poff 2003). Continued homogenization of the planet’s biota has increased ...
Rethinking Easter Island`s ecological catastrophe
... while Steadman et al. (1994, p. 92) document 25 seabird species and six undescribed land bird taxa in a roster of prehistorically extinct or extirpated avifauna. Only a fraction of the seabirds can be found on Rapa Nui and its offshore islands today. DiSalvo and Randall (1993) and DiSalvo et al. (19 ...
... while Steadman et al. (1994, p. 92) document 25 seabird species and six undescribed land bird taxa in a roster of prehistorically extinct or extirpated avifauna. Only a fraction of the seabirds can be found on Rapa Nui and its offshore islands today. DiSalvo and Randall (1993) and DiSalvo et al. (19 ...
UK NON-NATIVE ORGANISM RISK ASSESSMENT SCHEME
... al. 2003, Ortego 2007). Levels of persecution may be similar within the risk assessment area to those seen in other parts of the western European range. Instances of disturbance and persecution have already been noted at breeding sites within the Risk Assessment area (Holling et al . 2007), with MED ...
... al. 2003, Ortego 2007). Levels of persecution may be similar within the risk assessment area to those seen in other parts of the western European range. Instances of disturbance and persecution have already been noted at breeding sites within the Risk Assessment area (Holling et al . 2007), with MED ...
468-HBRC54 - Envirolink
... in spite of cat predation. The likelihood of successful reinvasion of these areas by native species following any cat control programme would depend on other factors such as the availability of suitable habitat. • The removal of cats from an area may lead to unexpected secondary effects such as chan ...
... in spite of cat predation. The likelihood of successful reinvasion of these areas by native species following any cat control programme would depend on other factors such as the availability of suitable habitat. • The removal of cats from an area may lead to unexpected secondary effects such as chan ...
Using the ESS Maximum Principle to Explore Root
... Competition between plants that differ in root-shoot allocation has been modelled using consumer-resource equations where competition occurs only through the utilization of resources. Provided that such models can be put into an evolutionary game setting, we show that conditions for coexistence can ...
... Competition between plants that differ in root-shoot allocation has been modelled using consumer-resource equations where competition occurs only through the utilization of resources. Provided that such models can be put into an evolutionary game setting, we show that conditions for coexistence can ...
Diversification in the Tropical Pacific: Comparisons Between Marine
... affecting dispersal probability vary through time; such variation can lead to vicariance when appropriately scaled. Three scales are relevant in determining whether founder or vicariant speciation is more likely: 1) the location and width of the speciation zone, 2) the spatial scale of temporal fluc ...
... affecting dispersal probability vary through time; such variation can lead to vicariance when appropriately scaled. Three scales are relevant in determining whether founder or vicariant speciation is more likely: 1) the location and width of the speciation zone, 2) the spatial scale of temporal fluc ...
Modelling coevolution in multispecies communities
... If one species preys on another then they are said to be linked. Basal species are those with predators but with no prey and top species are those with prey but with no predators. Intermediate species have both predators and prey. We will refer to the percentages of basal, intermediate and top speci ...
... If one species preys on another then they are said to be linked. Basal species are those with predators but with no prey and top species are those with prey but with no predators. Intermediate species have both predators and prey. We will refer to the percentages of basal, intermediate and top speci ...
arXiv:adap-org/9801003v1 16 Jan 1998
... If one species preys on another then they are said to be linked. Basal species are those with predators but with no prey and top species are those with prey but with no predators. Intermediate species have both predators and prey. We will refer to the percentages of basal, intermediate and top speci ...
... If one species preys on another then they are said to be linked. Basal species are those with predators but with no prey and top species are those with prey but with no predators. Intermediate species have both predators and prey. We will refer to the percentages of basal, intermediate and top speci ...
preliminary proofs — not for distribution - Forest Dynamics Lab
... Fall Line occur almost entirely within alluvial river valleys. These species are mostly absent on upland surfaces and therefore have a noncontiguous distribution within this physiographic region. These species, to varying degrees, can tolerate floods that typically occur during the winter and spring ...
... Fall Line occur almost entirely within alluvial river valleys. These species are mostly absent on upland surfaces and therefore have a noncontiguous distribution within this physiographic region. These species, to varying degrees, can tolerate floods that typically occur during the winter and spring ...
Are Species Adapted to Their Regeneration Niche, Adult Niche, or
... MA) were done on the youngest fully expanded leaf. The CO2 concentration was kept at 360 ppm, and light-saturated photosynthetic rates (Aarea in mmol m⫺2 s⫺1) were measured after full induction at a saturating photosynthetic photon flux density of 1,300 mmol m⫺2 s⫺1. The leaf was thereafter detached ...
... MA) were done on the youngest fully expanded leaf. The CO2 concentration was kept at 360 ppm, and light-saturated photosynthetic rates (Aarea in mmol m⫺2 s⫺1) were measured after full induction at a saturating photosynthetic photon flux density of 1,300 mmol m⫺2 s⫺1. The leaf was thereafter detached ...
Characteristics of a terrestrial small mammal assemblage in a
... relationships and demographic characteristics. The questions addressed here are: to what extent do small mammal faunas in relatively undisturbed rainforests show similar characteristics in their abundances, demography, reproductive patterns, and other ecological aspects? If major differences exist, ...
... relationships and demographic characteristics. The questions addressed here are: to what extent do small mammal faunas in relatively undisturbed rainforests show similar characteristics in their abundances, demography, reproductive patterns, and other ecological aspects? If major differences exist, ...
Depth segregation phenomenon and the macrofaunal diversity associated to
... to what extent individuals are drifted from the zone where they preferentially live. The shorter burrowing time of smaller clams, and their ability to burrow faster than larger individuals in coarse sands suggest that juveniles may be able to withstand more reflective morphodynamic conditions than a ...
... to what extent individuals are drifted from the zone where they preferentially live. The shorter burrowing time of smaller clams, and their ability to burrow faster than larger individuals in coarse sands suggest that juveniles may be able to withstand more reflective morphodynamic conditions than a ...
Pest Animal Management Discussion Paper
... DISCUSSION PAPER – PEST ANIMAL MANAGEMENT Role of the community (continued) Pests such as foxes and myna birds flourish in urban environments, feeding on pet food and uncovered compost heaps. Often domestic rabbits are released or escape into natural areas where they add to the wild rabbit populati ...
... DISCUSSION PAPER – PEST ANIMAL MANAGEMENT Role of the community (continued) Pests such as foxes and myna birds flourish in urban environments, feeding on pet food and uncovered compost heaps. Often domestic rabbits are released or escape into natural areas where they add to the wild rabbit populati ...
The form of direct interspecific competition modifies
... For each persistent food web that was assembled, equilibrium densities were used to rank each species according to relative abundance, within a trophic level. Each species was removed independently (primary deletion) and the feasibility and local stability of the remaining (mT – 1) species food web ...
... For each persistent food web that was assembled, equilibrium densities were used to rank each species according to relative abundance, within a trophic level. Each species was removed independently (primary deletion) and the feasibility and local stability of the remaining (mT – 1) species food web ...
Effects of River Impoundment on Ecosystem Services
... impoundment effects on the energetic costs of fisheries production (embodied energy) and commercial market value of the artisanal fishery of the Paraná River, Brazil, before and after formation of Itaipu Reservoir. High-value migratory species that dominated the fishery before the impoundment was b ...
... impoundment effects on the energetic costs of fisheries production (embodied energy) and commercial market value of the artisanal fishery of the Paraná River, Brazil, before and after formation of Itaipu Reservoir. High-value migratory species that dominated the fishery before the impoundment was b ...
insight review articles - Montana State University
... number of ways in which ranges can be distributed changes systematically between the bounds. Thus, whereas species with latitudinal midpoints midway between the bounds can extend a little or a long way before those bounds are encountered, those with midpoints close to the bounds can extend only a li ...
... number of ways in which ranges can be distributed changes systematically between the bounds. Thus, whereas species with latitudinal midpoints midway between the bounds can extend a little or a long way before those bounds are encountered, those with midpoints close to the bounds can extend only a li ...
Appendix A1: EPBC Assessment of Impact Significance on Listed EEC
... 0.03% of the remaining extent of RE 11.4.8, 0.04% of the remaining extent of RE 11.4.9 and 0.79% of the remaining extent of RE 11.9.5 would be affected by the proposed action. Within the relevant bioregion (Brigalow Belt North), this equates to a losses of approximately 0.01%, 0.02% and 0.003%, resp ...
... 0.03% of the remaining extent of RE 11.4.8, 0.04% of the remaining extent of RE 11.4.9 and 0.79% of the remaining extent of RE 11.9.5 would be affected by the proposed action. Within the relevant bioregion (Brigalow Belt North), this equates to a losses of approximately 0.01%, 0.02% and 0.003%, resp ...
mainstreaming biodiversity
... • A total of 103 species of mammals were threatened with extinction in the ESCWA region in 2006, representing 17 per cent of the region’s species of mammals, registering an increase of 49 per cent since 2002. • A total of 145 species of birds were threatened with extinction in the ESCWA region in ...
... • A total of 103 species of mammals were threatened with extinction in the ESCWA region in 2006, representing 17 per cent of the region’s species of mammals, registering an increase of 49 per cent since 2002. • A total of 145 species of birds were threatened with extinction in the ESCWA region in ...
Green Invaders: Study Guide
... from creating just the right conditions for mosquito larvae to thrive, hydrilla has most recently been discovered to host a pond scum accused of killing more than 100 bald eagles and thousands of waterfowl. The scum, a blue-green alga, hides out in the tangles of hydrilla. As waterfowl eat the hydri ...
... from creating just the right conditions for mosquito larvae to thrive, hydrilla has most recently been discovered to host a pond scum accused of killing more than 100 bald eagles and thousands of waterfowl. The scum, a blue-green alga, hides out in the tangles of hydrilla. As waterfowl eat the hydri ...
Competitive Ability and Species Coexistence: A `Plant`s
... L. W. Aarssen, Dept of Biology, Queen's Univ., Kingston, Ontario, Canada K7L 3N6. ...
... L. W. Aarssen, Dept of Biology, Queen's Univ., Kingston, Ontario, Canada K7L 3N6. ...
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.