Local Ecological Communities
... There is an established fact: medium term persistence in community membership. But persistence on this scale may not depend on internal regulation (though the issues remain both technical and fraught: see Turchin 1999). The alternative to internal regulation is stabilization through migration: commu ...
... There is an established fact: medium term persistence in community membership. But persistence on this scale may not depend on internal regulation (though the issues remain both technical and fraught: see Turchin 1999). The alternative to internal regulation is stabilization through migration: commu ...
Competitive ability of the epilithic moss Thuidium
... and light availability (Proctor & Tuba 2002). Their sensibility to water loss has been considered to be compensated by behavioral responses, like growth forms and water retention properties (Pedersen et al. 2001). Due to their small size and low growth rate bryophytes have not been considered strong ...
... and light availability (Proctor & Tuba 2002). Their sensibility to water loss has been considered to be compensated by behavioral responses, like growth forms and water retention properties (Pedersen et al. 2001). Due to their small size and low growth rate bryophytes have not been considered strong ...
Wildlife Management Practices (WMPs)
... in all ecoregions, even though some of the species may be the same. Current conditions should be considered when deciding if a WMP needs to be applied within the next year. However, the benefits of a WMP may not be realized for years. For example, planting trees in a field to provide habitat for eas ...
... in all ecoregions, even though some of the species may be the same. Current conditions should be considered when deciding if a WMP needs to be applied within the next year. However, the benefits of a WMP may not be realized for years. For example, planting trees in a field to provide habitat for eas ...
The Association and Diversification of Trapezia Crabs with their
... are highly prone to recurring stresses (Holbrook et al. 2008). Moreover, natural and anthropogenic disturbances are gaining increasing concern as changes to the coral reef communities can have cascading effects on their symbionts (Gibson 2011, Sin 2000). Mutualisms direct how coral-associates partit ...
... are highly prone to recurring stresses (Holbrook et al. 2008). Moreover, natural and anthropogenic disturbances are gaining increasing concern as changes to the coral reef communities can have cascading effects on their symbionts (Gibson 2011, Sin 2000). Mutualisms direct how coral-associates partit ...
The architecture of mutualistic networks minimizes competition and
... possible cases, it can be shown that in this case there is no possible fixed point where the species below the strong mutualism threshold have positive biomass. It follows from this analysis that, if one pair of species overcomes the strong mutualism threshold, no other species below the threshold ca ...
... possible cases, it can be shown that in this case there is no possible fixed point where the species below the strong mutualism threshold have positive biomass. It follows from this analysis that, if one pair of species overcomes the strong mutualism threshold, no other species below the threshold ca ...
Reiskind, M.H. and M.L. Wilson. 2008. Interspecific
... albopictus was the superior competitor in these studies as well. However, several studies and Þeld observations suggest the competitive outcome does not necessarily lead to competitive displacement and may result in coexistence (Black et al. 1989, Livdahl and Willey 1991, OÕMeara et al. 1995, Edgerl ...
... albopictus was the superior competitor in these studies as well. However, several studies and Þeld observations suggest the competitive outcome does not necessarily lead to competitive displacement and may result in coexistence (Black et al. 1989, Livdahl and Willey 1991, OÕMeara et al. 1995, Edgerl ...
Incorporating Plant Mortality and Recruitment Into
... providing new propagules are vegetative reproduction (such as rhizomes or stolons), or sexual reproduction via seed. Bunchgrasses are generally assumed to reproduce via seed, although there is evidence that over time, some bunches can break up and migrate apart (Liston et al. 2003). For this discuss ...
... providing new propagules are vegetative reproduction (such as rhizomes or stolons), or sexual reproduction via seed. Bunchgrasses are generally assumed to reproduce via seed, although there is evidence that over time, some bunches can break up and migrate apart (Liston et al. 2003). For this discuss ...
Nesting Activity and Conservation Status of the
... Globally, populations of sea turtles are declining and experiencing serious threats to their survival and are considered internationally as species of conservation concern. Over-hunting for their shells and meat, the collection of eggs from turtle nests, threatened by coastal development, pollution ...
... Globally, populations of sea turtles are declining and experiencing serious threats to their survival and are considered internationally as species of conservation concern. Over-hunting for their shells and meat, the collection of eggs from turtle nests, threatened by coastal development, pollution ...
Distinguishing between direct and indirect effects of predators in
... species loss for ecosystems and the goods and services they provide. Species at higher trophic levels are at greater risk of human-induced extinction yet remarkably little is known about the effects of consumer species loss across multiple trophic levels in natural complex ecosystems. Previous studi ...
... species loss for ecosystems and the goods and services they provide. Species at higher trophic levels are at greater risk of human-induced extinction yet remarkably little is known about the effects of consumer species loss across multiple trophic levels in natural complex ecosystems. Previous studi ...
Vegetation succession in old fields at broad landscape scales
... forbs and grasses (iii), which are followed by colonizing woody plants (iv). Under very wet or dry conditions, the late forbs and graminoids (v) may be the last stage for a long time, but more often the succession is terminated by late-successional tree species (vi) (Osbornová et al. 1990, Erjnǽs et ...
... forbs and grasses (iii), which are followed by colonizing woody plants (iv). Under very wet or dry conditions, the late forbs and graminoids (v) may be the last stage for a long time, but more often the succession is terminated by late-successional tree species (vi) (Osbornová et al. 1990, Erjnǽs et ...
01_GR9_UA_BioDiversity - Calgary Catholic Schools
... An organism that shows a great deal of genetic diversity is the banded snail. Members of this species show a tremendous amount of variation in shell colouring as well as the banding on their shells. The colour can range from yellow to brown, and the bands on the shell can range from no bands to band ...
... An organism that shows a great deal of genetic diversity is the banded snail. Members of this species show a tremendous amount of variation in shell colouring as well as the banding on their shells. The colour can range from yellow to brown, and the bands on the shell can range from no bands to band ...
Nevada Wildlife Action Plan - Nevada Department of Wildlife
... avifauna, including several species that thrive in the interface between mesquite and the creosote bushdominated bajadas (Black-tailed Gnatcatcher, Crissal Thrasher, and Verdin). Of the species that depend on the midstory habitat layer, the Bell’s Vireo and the endangered Southwestern Willow Flycatc ...
... avifauna, including several species that thrive in the interface between mesquite and the creosote bushdominated bajadas (Black-tailed Gnatcatcher, Crissal Thrasher, and Verdin). Of the species that depend on the midstory habitat layer, the Bell’s Vireo and the endangered Southwestern Willow Flycatc ...
Pages 239–248682.15 KB - Department of Parks and Wildlife
... The diet of foxes in two fragmented Wheatbelt reserves in south-west Western Australia, Dryandra Woodland (DW) and Tutanning Nature Reserve (TNR), was investigated. Fox baiting commenced in these reserves in the early 1980s and the trap success of woylies (Bettongia penicillata), a threatened specie ...
... The diet of foxes in two fragmented Wheatbelt reserves in south-west Western Australia, Dryandra Woodland (DW) and Tutanning Nature Reserve (TNR), was investigated. Fox baiting commenced in these reserves in the early 1980s and the trap success of woylies (Bettongia penicillata), a threatened specie ...
Land use vs. fragment size and isolation as determinants
... et al., 2000; Cook et al., 2002; Silva et al., 2005; Anderson et al., 2007), whereas cattle ranching in extensive pastures may not offer much shelter or food, and the structure of forest may be further disturbed if cattle is allowed to enter the fragment (Horvath et al., 2001; Maron and Lill, 2005). ...
... et al., 2000; Cook et al., 2002; Silva et al., 2005; Anderson et al., 2007), whereas cattle ranching in extensive pastures may not offer much shelter or food, and the structure of forest may be further disturbed if cattle is allowed to enter the fragment (Horvath et al., 2001; Maron and Lill, 2005). ...
Vegetation dynamics and community assembly in post
... Resource Management at the University of Copenhagen. This PhD evolved in a different direction than was originally planned. When I first started, Nørholm heathland was going to be only part of my dissertation. After participating in fieldwork and some months of working with the historical dataset, t ...
... Resource Management at the University of Copenhagen. This PhD evolved in a different direction than was originally planned. When I first started, Nørholm heathland was going to be only part of my dissertation. After participating in fieldwork and some months of working with the historical dataset, t ...
Risk analysis report of non-native organisms in Belgium
... identifying the organism and its introduction pathways that should be considered for risk analysis in relation to Belgium, (2) the risk assessment stage which includes the categorization of emerging nonnative species to determine whether the criteria for a quarantine organism are satisfied and an ev ...
... identifying the organism and its introduction pathways that should be considered for risk analysis in relation to Belgium, (2) the risk assessment stage which includes the categorization of emerging nonnative species to determine whether the criteria for a quarantine organism are satisfied and an ev ...
Biodiversity and Ecosystem Functioning: Basic
... ‘redundant’ (Lawton and Brown, chapter 12 in Schulze and Mooney 1993). While this might be true under stable environmental conditions, such ‘redundant’ species might replace species that are lost under changing conditions such as disturbance events or climate change. In consequence, the ‘insurance h ...
... ‘redundant’ (Lawton and Brown, chapter 12 in Schulze and Mooney 1993). While this might be true under stable environmental conditions, such ‘redundant’ species might replace species that are lost under changing conditions such as disturbance events or climate change. In consequence, the ‘insurance h ...
Protecting Trout Cod - NSW Department of Primary Industries
... A recovery plan has been prepared for Trout Cod that sets out the actions required to recover the species to a position of viability in nature. A specific objective in the recovery plan is to establish and protect a minimum of two new selfsustaining populations of Trout Cod at selected locations thr ...
... A recovery plan has been prepared for Trout Cod that sets out the actions required to recover the species to a position of viability in nature. A specific objective in the recovery plan is to establish and protect a minimum of two new selfsustaining populations of Trout Cod at selected locations thr ...
Ch 54 - Houston ISD
... • Dominant species are those that are most abundant or have the highest biomass • Biomass is the total mass of all individuals in a population • Dominant species exert powerful control over the occurrence and distribution of other species ...
... • Dominant species are those that are most abundant or have the highest biomass • Biomass is the total mass of all individuals in a population • Dominant species exert powerful control over the occurrence and distribution of other species ...
Central Valley and Sierra Nevada
... porous volcanic rock. Periods of drought can cause portions of the stream to dry up and the overall lack of habitat limits the populations’ ability to recolonize or move if a disturbance like wildfire eliminates fish from some portion of the stream. Furthermore, most species exist as populations at ...
... porous volcanic rock. Periods of drought can cause portions of the stream to dry up and the overall lack of habitat limits the populations’ ability to recolonize or move if a disturbance like wildfire eliminates fish from some portion of the stream. Furthermore, most species exist as populations at ...
54_Lecture_Presentation - APBiology2015-2016
... • Dominant species are those that are most abundant or have the highest biomass • Biomass is the total mass of all individuals in a population • Dominant species exert powerful control over the occurrence and distribution of other species ...
... • Dominant species are those that are most abundant or have the highest biomass • Biomass is the total mass of all individuals in a population • Dominant species exert powerful control over the occurrence and distribution of other species ...
The Landscape Ecology of Invasive Spread
... scale” ( Urban et al. 1987 ); and (3) the study of the “effect of pattern on process” (Turner 1989). The first two definitions imply that a landscape is an area of broad spatial extent that occurs at a level of organization above ecosystems and communities (but below the biome) in the traditional ec ...
... scale” ( Urban et al. 1987 ); and (3) the study of the “effect of pattern on process” (Turner 1989). The first two definitions imply that a landscape is an area of broad spatial extent that occurs at a level of organization above ecosystems and communities (but below the biome) in the traditional ec ...
Chapter 54
... • Dominant species are those that are most abundant or have the highest biomass • Biomass is the total mass of all individuals in a population • Dominant species exert powerful control over the occurrence and distribution of other species ...
... • Dominant species are those that are most abundant or have the highest biomass • Biomass is the total mass of all individuals in a population • Dominant species exert powerful control over the occurrence and distribution of other species ...
UNCORRECTED PROOF Frog community responses to recent
... ssp., Beckmannia spp., Potentilla ssp. and perennial plants like Carex spp. and Alternanthera philoxeroides. Most water bodies have a patrolman who is responsible for protecting them from damage due to human activities or natural disasters. Human activities such as fishing and swimming in water bodi ...
... ssp., Beckmannia spp., Potentilla ssp. and perennial plants like Carex spp. and Alternanthera philoxeroides. Most water bodies have a patrolman who is responsible for protecting them from damage due to human activities or natural disasters. Human activities such as fishing and swimming in water bodi ...
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.