INTERMEDIATE DISTURBANCE AND ITS RELATIONSHIP TO
... competing model, gradual climate change (Connell, 1978) in lake ecosystems (Padisák, 1994; Wilson, 1994; Reynolds, 1995). In the gradual climate change model, changes in environmental conditions such as those due to seasonality prevent any species from achieving dominance in a community. As conditio ...
... competing model, gradual climate change (Connell, 1978) in lake ecosystems (Padisák, 1994; Wilson, 1994; Reynolds, 1995). In the gradual climate change model, changes in environmental conditions such as those due to seasonality prevent any species from achieving dominance in a community. As conditio ...
stochastic processes across scales Disentangling the importance of
... shift towards more regional perspectives on ecological communities, as well as integration of local and regional perspectives, to better understand how processes at broader scales influence biodiversity (e.g. [8,25 – 28]). Here, we develop a framework for testing the importance of ecological niches ...
... shift towards more regional perspectives on ecological communities, as well as integration of local and regional perspectives, to better understand how processes at broader scales influence biodiversity (e.g. [8,25 – 28]). Here, we develop a framework for testing the importance of ecological niches ...
Section 1 How Organisms Interact in Communities
... Common Use of Scarce Resources and Competition When two species use the same resource, they participate in a biological interaction called competition. Resources for which species compete include food, nesting sites, living space, light, mineral nutrients, and water. Competition occurs for resources ...
... Common Use of Scarce Resources and Competition When two species use the same resource, they participate in a biological interaction called competition. Resources for which species compete include food, nesting sites, living space, light, mineral nutrients, and water. Competition occurs for resources ...
Hypotheses on the role of the protistan rare biosphere in a changing
... rare taxa might also be maintained by experiencing bursts of population growth during short periods of favorable conditions. Alternatively, local extinction might occur in some habitats, but periodic reintroduction from distant locales may effectively maintain populations at very low absolute abunda ...
... rare taxa might also be maintained by experiencing bursts of population growth during short periods of favorable conditions. Alternatively, local extinction might occur in some habitats, but periodic reintroduction from distant locales may effectively maintain populations at very low absolute abunda ...
MMinte: an application for predicting metabolic interactions among
... analyses—allows us to assess α-diversity, β-diversity, and microbe-microbe associations, which characterize the overall properties of an ecosystem. However, we are still unable to use 16S rDNA data to directly assess the microbe-microbe and microbe-environment interactions that determine the broader ...
... analyses—allows us to assess α-diversity, β-diversity, and microbe-microbe associations, which characterize the overall properties of an ecosystem. However, we are still unable to use 16S rDNA data to directly assess the microbe-microbe and microbe-environment interactions that determine the broader ...
Can the biomass-ratio hypothesis predict mixed
... eic is the average per capita effect of species i in community c, pic is the relative abundance of species i and Ec is the communityweighted effect on the ecosystem summed over all S species present. The average per capita effects of each species (eic) can ...
... eic is the average per capita effect of species i in community c, pic is the relative abundance of species i and Ec is the communityweighted effect on the ecosystem summed over all S species present. The average per capita effects of each species (eic) can ...
Universidade Federal de Uberlândia Instituto de Biologia Programa
... community (Leibold & McPeek, 2006; Hunt et al., 2008). This reduces the conflict arising from competition for food, space and other limiting resources. Due to competition for the same niche occupation, different organisms tend to displace each other from their optimal initial niches. In this sense, ...
... community (Leibold & McPeek, 2006; Hunt et al., 2008). This reduces the conflict arising from competition for food, space and other limiting resources. Due to competition for the same niche occupation, different organisms tend to displace each other from their optimal initial niches. In this sense, ...
using experimental evolution to investigate
... Many mechanisms have been proposed to limit the potential for adaptive evolution at range boundaries. Some hypotheses propose that marginal populations lack genetic variation in traits necessary for range expansion, perhaps due to genetic drift in small populations, increased environmental variation ...
... Many mechanisms have been proposed to limit the potential for adaptive evolution at range boundaries. Some hypotheses propose that marginal populations lack genetic variation in traits necessary for range expansion, perhaps due to genetic drift in small populations, increased environmental variation ...
using experimental evolution to investigate geographic range limits
... Many mechanisms have been proposed to limit the potential for adaptive evolution at range boundaries. Some hypotheses propose that marginal populations lack genetic variation in traits necessary for range expansion, perhaps due to genetic drift in small populations, increased environmental variation ...
... Many mechanisms have been proposed to limit the potential for adaptive evolution at range boundaries. Some hypotheses propose that marginal populations lack genetic variation in traits necessary for range expansion, perhaps due to genetic drift in small populations, increased environmental variation ...
Also available as free
... Kazakhstan where he and a small team have focussed upon the area of the Aral Sea. Dr. Aladin’s studies were performed during a period of change, both in the patterns of organismic assemblages and in the political structure of his country. These studies were undertaken in his own time and at his own ...
... Kazakhstan where he and a small team have focussed upon the area of the Aral Sea. Dr. Aladin’s studies were performed during a period of change, both in the patterns of organismic assemblages and in the political structure of his country. These studies were undertaken in his own time and at his own ...
Chapter 50-55 Biojeopardy
... and light penetration influences primary productivity through the photic zone. More than light, a ____________ ___________ (2 words) is an element that must be added in order for production to increase. What is a limiting nutrient (usually N and P) ...
... and light penetration influences primary productivity through the photic zone. More than light, a ____________ ___________ (2 words) is an element that must be added in order for production to increase. What is a limiting nutrient (usually N and P) ...
carrying capacity - Issaquah Connect
... and light penetration influences primary productivity through the photic zone. More than light, a ____________ ___________ (2 words) is an element that must be added in order for production to increase. What is a limiting nutrient (usually N and P) ...
... and light penetration influences primary productivity through the photic zone. More than light, a ____________ ___________ (2 words) is an element that must be added in order for production to increase. What is a limiting nutrient (usually N and P) ...
Character Convergence under Competition for Nutritionally
... consumer j. The biological interpretation of vj depends on the model derivation. The quantity [⭸(1/Nj )(dNj /dt)]/⭸uj is the slope of the fitness gradient, the partial derivative of the fitness (per capita growth rate) of consumer j with respect to uj. There are two ways to derive equation (3) as a ...
... consumer j. The biological interpretation of vj depends on the model derivation. The quantity [⭸(1/Nj )(dNj /dt)]/⭸uj is the slope of the fitness gradient, the partial derivative of the fitness (per capita growth rate) of consumer j with respect to uj. There are two ways to derive equation (3) as a ...
indirect facilitation: evidence and predictions from a riparian
... effect. Although theory predicts that these interactions may be common in assemblages of three or more competitors, experimental studies of this process are rare. Here, I report a study of a northern California riparian community, where I tested the hypothesis that the sedge Carex nudata had direct ...
... effect. Although theory predicts that these interactions may be common in assemblages of three or more competitors, experimental studies of this process are rare. Here, I report a study of a northern California riparian community, where I tested the hypothesis that the sedge Carex nudata had direct ...
Disentangling the importance of ecological niches from stochastic
... that arrival of propagules from the species pool strongly limits local species richness, further suggesting that many communities are not saturated with species [7,82–84]. Likewise, local diversity is typically higher in metacommunities where dispersal rates among localities are more frequent relati ...
... that arrival of propagules from the species pool strongly limits local species richness, further suggesting that many communities are not saturated with species [7,82–84]. Likewise, local diversity is typically higher in metacommunities where dispersal rates among localities are more frequent relati ...
Hixon, M. A., P. W. Pacala, and S. A. Sandin. 2002. Population
... Abstract. By definition, a population is regulated if it persists for many generations with fluctuations bounded above zero with high probability. Regulation thus requires density-dependent negative feedback whereby the population has a propensity to increase when small and decrease when large. Ulti ...
... Abstract. By definition, a population is regulated if it persists for many generations with fluctuations bounded above zero with high probability. Regulation thus requires density-dependent negative feedback whereby the population has a propensity to increase when small and decrease when large. Ulti ...
Importance of large carnivores for species diversity and top down
... Also, interspecific competition does occur in those trophic levels. In turn, density independent processes like predation are limiting herbivores in the middle level. Following this, herbivores do not compete for food. Hairston et al. (1960) also argued that predators at the top of food webs might c ...
... Also, interspecific competition does occur in those trophic levels. In turn, density independent processes like predation are limiting herbivores in the middle level. Following this, herbivores do not compete for food. Hairston et al. (1960) also argued that predators at the top of food webs might c ...
Evidence for interspecific interactions in the ectoparasite infracommunity of a wild mammal
... that studies employing experimental manipulations are better suited to identify interspecific relationships between parasite species infesting the same host [18–20]. The resilience (time of recovery from a perturbation) of a community is strongly dependent on the nature and strength of interspecific ...
... that studies employing experimental manipulations are better suited to identify interspecific relationships between parasite species infesting the same host [18–20]. The resilience (time of recovery from a perturbation) of a community is strongly dependent on the nature and strength of interspecific ...
Disturbance and distributions: avoiding exclusion in a warming world
... the composition of a highly disturbed community can be influenced by additional disturbance (Chesson and Huntly 1997, Violle et al. 2010). Exclusion is well studied in simple diversity-disturbance models in which all but the most competitive species are considered fugitive species; these persist onl ...
... the composition of a highly disturbed community can be influenced by additional disturbance (Chesson and Huntly 1997, Violle et al. 2010). Exclusion is well studied in simple diversity-disturbance models in which all but the most competitive species are considered fugitive species; these persist onl ...
page proofs oofs
... living community and the non-living physical surroundings but also the interactions both within the community and between the community and its nonliving surroundings. We can develop an understanding of the concept of an ecosystem using an analogy with a hockey game. A hockey game has a ‘living part ...
... living community and the non-living physical surroundings but also the interactions both within the community and between the community and its nonliving surroundings. We can develop an understanding of the concept of an ecosystem using an analogy with a hockey game. A hockey game has a ‘living part ...
14.1 Habitat And Niche
... • A habitat is all aspects of the area in which an organism lives. – biotic factors – abiotic factors • An ecological niche includes all of the factors that a species needs to survive, stay healthy, and reproduce. – food – abiotic conditions – behavior ...
... • A habitat is all aspects of the area in which an organism lives. – biotic factors – abiotic factors • An ecological niche includes all of the factors that a species needs to survive, stay healthy, and reproduce. – food – abiotic conditions – behavior ...
Adaptive Growth Decisions in Butterflies
... Sexual differences in growth trajectories are common in insects and follow two broad patterns. First, females typically grow to be larger than males (Blanckenhorn et al. 2007). A likely explanation for this is that female fecundity increases with adult size, whereas male mating success is less depen ...
... Sexual differences in growth trajectories are common in insects and follow two broad patterns. First, females typically grow to be larger than males (Blanckenhorn et al. 2007). A likely explanation for this is that female fecundity increases with adult size, whereas male mating success is less depen ...
Control of plant species diversity and community invasibility by
... Hill, North Carolina, USA. In these plots we constructed plant communities from seed with different levels of seeded richness and density of seed per species. We used three levels each of seed richness (3, 10, and 30 species) and density of seed per species (10, 100, and 1000 seeds), crossed in a fu ...
... Hill, North Carolina, USA. In these plots we constructed plant communities from seed with different levels of seeded richness and density of seed per species. We used three levels each of seed richness (3, 10, and 30 species) and density of seed per species (10, 100, and 1000 seeds), crossed in a fu ...
Sample pages 2 PDF
... According to Sommer et al. (1993), a disturbance consists of (or causes) any fluctuation in the availability of resources. This definition differs from the others because it implies that not only the discrete changes (through clear-cut thresholds) but also the continuous changes along gradients may b ...
... According to Sommer et al. (1993), a disturbance consists of (or causes) any fluctuation in the availability of resources. This definition differs from the others because it implies that not only the discrete changes (through clear-cut thresholds) but also the continuous changes along gradients may b ...
Effect of abiotic factors on reproduction in the centre and periphery
... The relationship between rainfall and reproduction was probably mediated through food abundance, which in Mediterranean habitat depends directly on rainfall levels. In the Montagu’s harrier, no negative effect of dry seasons on productivity was found. Additionally, in the hen harrier, the proportion ...
... The relationship between rainfall and reproduction was probably mediated through food abundance, which in Mediterranean habitat depends directly on rainfall levels. In the Montagu’s harrier, no negative effect of dry seasons on productivity was found. Additionally, in the hen harrier, the proportion ...