The interplay between environmental conditions and Allee effects
... could act to exaggerate pH-related differences in r when populations are introduced at low initial densities, but would have little effect on r when populations start at high initial densities (Fig. 1). The potential for this type of interaction has typically been overlooked by ecologists studying t ...
... could act to exaggerate pH-related differences in r when populations are introduced at low initial densities, but would have little effect on r when populations start at high initial densities (Fig. 1). The potential for this type of interaction has typically been overlooked by ecologists studying t ...
Mammal invaders on islands: impact, control and control impact
... The invasion of ecosystems by exotic species is currently viewed as one of the most important sources of biodiversity loss. The largest part of this loss occurs on islands, where indigenous species have often evolved in the absence of strong competition, herbivory, parasitism or predation. As a resu ...
... The invasion of ecosystems by exotic species is currently viewed as one of the most important sources of biodiversity loss. The largest part of this loss occurs on islands, where indigenous species have often evolved in the absence of strong competition, herbivory, parasitism or predation. As a resu ...
1 - Black Rock Forest Consortium
... larger in body size and therefore of potentially greater influence on ecosystem processes and community structure. Salamanders are among the more common and well-studied vertebrates co-habiting decomposer communities and some studies have suggested that they can have significant impacts on rates of ...
... larger in body size and therefore of potentially greater influence on ecosystem processes and community structure. Salamanders are among the more common and well-studied vertebrates co-habiting decomposer communities and some studies have suggested that they can have significant impacts on rates of ...
Chapter 11
... the nestling phase, and nestling growth rate, suggesting that seasonal rains provide a crucially important food stimulus (e.g. insects, amphibians; Thiollay 1978a, Njiforti 1997) which enhanced nestling growth. In line with these results, I found a positive relationship between rainfall and Grasshop ...
... the nestling phase, and nestling growth rate, suggesting that seasonal rains provide a crucially important food stimulus (e.g. insects, amphibians; Thiollay 1978a, Njiforti 1997) which enhanced nestling growth. In line with these results, I found a positive relationship between rainfall and Grasshop ...
Frontiers in Polar Biology - Division on Earth and Life Studies
... audience because polar ecosystems play an important role in global-scale phenomena. The key mechanism for reaching nonscientists is the mass media. Education and outreach should especially target the indigenous communities that are part of the arctic ecosystem. This local effort should be two-way wi ...
... audience because polar ecosystems play an important role in global-scale phenomena. The key mechanism for reaching nonscientists is the mass media. Education and outreach should especially target the indigenous communities that are part of the arctic ecosystem. This local effort should be two-way wi ...
Habitat Loss and Fragmentation
... ability to accurately identify the relationship between landscape structure and population or community outcomes. Numerous studies show that the spatial extent over which habitat is measured influences the strength of the relationship between habitat and the response of interest (e.g., abundance), a ...
... ability to accurately identify the relationship between landscape structure and population or community outcomes. Numerous studies show that the spatial extent over which habitat is measured influences the strength of the relationship between habitat and the response of interest (e.g., abundance), a ...
Qi Peng
... According to Lindeman, the animals at the base of a food chain are more abundant while those towards the end become progressively fewer in number. (Lindeman) This is caused by increasing energy loss towards the end of food chain and the progressively increasing size of the predator on top of the foo ...
... According to Lindeman, the animals at the base of a food chain are more abundant while those towards the end become progressively fewer in number. (Lindeman) This is caused by increasing energy loss towards the end of food chain and the progressively increasing size of the predator on top of the foo ...
Slide 1
... Basics of SORTIE: Spatially explicit model predicting the fate of every individual tree throughout its life Individual performance is affected by resource availability at each tree’s location (original SORTIE only included competition for light) Species-specific functions predict each individual’s g ...
... Basics of SORTIE: Spatially explicit model predicting the fate of every individual tree throughout its life Individual performance is affected by resource availability at each tree’s location (original SORTIE only included competition for light) Species-specific functions predict each individual’s g ...
ON THE ECOLOGY OF INVASIVE SPECIES, EXTINCTION
... extinctions. Nowhere is this more apparent than on islands. Those ecosystem changes and extinctions are result of strong species interactions between invasive species and native communities. However, extinctions are rarely random and are often influenced by a suite of biotic and abiotic factors. Und ...
... extinctions. Nowhere is this more apparent than on islands. Those ecosystem changes and extinctions are result of strong species interactions between invasive species and native communities. However, extinctions are rarely random and are often influenced by a suite of biotic and abiotic factors. Und ...
ON THE ECOLOGY OF INVASIVE SPECIES, EXTINCTION
... extinctions. Nowhere is this more apparent than on islands. Those ecosystem changes and extinctions are result of strong species interactions between invasive species and native communities. However, extinctions are rarely random and are often influenced by a suite of biotic and abiotic factors. Und ...
... extinctions. Nowhere is this more apparent than on islands. Those ecosystem changes and extinctions are result of strong species interactions between invasive species and native communities. However, extinctions are rarely random and are often influenced by a suite of biotic and abiotic factors. Und ...
Philosophy of Ecology - sikkim university library
... to include them or begin a new branch of science based on them. In order for the last of these possibilities to occur, both novelty and success or productivity are required. For example, in ecology, we need the new abductions to be useful in a wide range of geographical situations or species. Van de ...
... to include them or begin a new branch of science based on them. In order for the last of these possibilities to occur, both novelty and success or productivity are required. For example, in ecology, we need the new abductions to be useful in a wide range of geographical situations or species. Van de ...
supervisors
... that the effects of rapidly increasing levels of anthropogenic CO2 are now becoming evident in living corals, reinforcing the concerns about the impact of ocean acidity on coral reef systems. He has also undertaken research on fossil coral reefs, in particular those from the Last Interglacial, where ...
... that the effects of rapidly increasing levels of anthropogenic CO2 are now becoming evident in living corals, reinforcing the concerns about the impact of ocean acidity on coral reef systems. He has also undertaken research on fossil coral reefs, in particular those from the Last Interglacial, where ...
MULTIPLE CONTROLS OF COMMUNITY STRUCTURE AND
... dynamics of populations and communities. Bottom-up and top-down forces do not act in isolation, they vary within and among systems (e.g., Power 1992, Menge 2000), and their relative strength in determining community structure and dynamics is context dependent (e.g., Worm et al. 2002, Hughes et al. 2 ...
... dynamics of populations and communities. Bottom-up and top-down forces do not act in isolation, they vary within and among systems (e.g., Power 1992, Menge 2000), and their relative strength in determining community structure and dynamics is context dependent (e.g., Worm et al. 2002, Hughes et al. 2 ...
Intertidal Community Structure: Space
... among yearsifthe numberof recruitinglarvae is variable and sometimesless than thatrequiredto saturate the available resources. Similarly,the importanceof competitionvaries withsettlementdifferinterspecific ences among years (Connell 1985), and these differences maypromotespeciescoexistencein thelong ...
... among yearsifthe numberof recruitinglarvae is variable and sometimesless than thatrequiredto saturate the available resources. Similarly,the importanceof competitionvaries withsettlementdifferinterspecific ences among years (Connell 1985), and these differences maypromotespeciescoexistencein thelong ...
Detection of alternative stable states in marine communities
... It would seem a good test of the theory would simply require showing that a given habitat would support two or more different assemblages of species and that these assemblages were stable (Peterson, 1984). Moving from theory to practice is, however, not straightforward. While the meaning of stabilit ...
... It would seem a good test of the theory would simply require showing that a given habitat would support two or more different assemblages of species and that these assemblages were stable (Peterson, 1984). Moving from theory to practice is, however, not straightforward. While the meaning of stabilit ...
Predator control of ecosystem nutrient dynamics
... changes in metabolism that change the demand for and release of particular nutrients. Predator consumptive effects are readily observable in field studies, whereas non-consumptive effects tend to be more subtle and thus require systematic predator-exclusion experiments to be revealed. We identified ...
... changes in metabolism that change the demand for and release of particular nutrients. Predator consumptive effects are readily observable in field studies, whereas non-consumptive effects tend to be more subtle and thus require systematic predator-exclusion experiments to be revealed. We identified ...
Trait selection during food web assembly
... convert into new biomass. Such parameterized models have been studied to address the stability of consumer–resource systems (Yodzis and Innes 1992; Vasseur and McCann 2005). However, the implications of body mass constraints on coexistence have not been elucidated so far in speciesrich food webs. Du ...
... convert into new biomass. Such parameterized models have been studied to address the stability of consumer–resource systems (Yodzis and Innes 1992; Vasseur and McCann 2005). However, the implications of body mass constraints on coexistence have not been elucidated so far in speciesrich food webs. Du ...
Prairie Ecosystem Management - Alberta Prairie Conservation Forum
... represents no variation in size, intensity or return interval. High variation would plot close to the end of the axes. Although little actual data are available on the size, intensity and return interval of disturbance events from before settlement, scientific and historical evidence suggests that n ...
... represents no variation in size, intensity or return interval. High variation would plot close to the end of the axes. Although little actual data are available on the size, intensity and return interval of disturbance events from before settlement, scientific and historical evidence suggests that n ...
Themes, Approaches, and Differences with Environmental Economics
... namely, equilibrium analysis, which assumes that efficiency can be assessed independent of distribution, is inaccurate at best (Martinez-Alier and O’Connor 1999). ERE focuses on value dimensions: namely, utility and welfare in theory, and costs and benefits in practice. Unlike neoclassical economic ...
... namely, equilibrium analysis, which assumes that efficiency can be assessed independent of distribution, is inaccurate at best (Martinez-Alier and O’Connor 1999). ERE focuses on value dimensions: namely, utility and welfare in theory, and costs and benefits in practice. Unlike neoclassical economic ...
Restoration ecology
Restoration ecology emerged as a separate field in ecology in the 1980s. It is the scientific study supporting the practice of ecological restoration, which is the practice of renewing and restoring degraded, damaged, or destroyed ecosystems and habitats in the environment by active human intervention and action. The term ""restoration ecology"" is therefore commonly used for the academic study of the process, whereas the term ""ecological restoration"" is commonly used for the actual project or process by restoration practitioners.