Extending the stressgradient hypothesis is competition among
... evaluate the applicability of the SGH to terrestrial vertebrates. We then discuss future directions for research that will help in defining a framework to include positive, negative and neutral interactions as potential drivers structuring animal communities under differing environmental conditions. ...
... evaluate the applicability of the SGH to terrestrial vertebrates. We then discuss future directions for research that will help in defining a framework to include positive, negative and neutral interactions as potential drivers structuring animal communities under differing environmental conditions. ...
Learning Outcomes for Ecology Concepts and Applications 6e
... 1. Describe the environmental circumstances, especially temperature conditions, in which the Sonoran Desert cicada, Diceroprocta apache, emits its buzzing call. 2. List the research questions that Eric Toolson considered as he went about collecting Sonoran Desert cicadas. 6.1 Water Availability 1. D ...
... 1. Describe the environmental circumstances, especially temperature conditions, in which the Sonoran Desert cicada, Diceroprocta apache, emits its buzzing call. 2. List the research questions that Eric Toolson considered as he went about collecting Sonoran Desert cicadas. 6.1 Water Availability 1. D ...
Wolves–coyotes–foxes: a cascade among carnivores
... is still growing nearly exponentially so that this population has not yet experienced competition for food resources. Therefore it is not surprising that strong density dependence has not been achieved thus far in that zone. The multispecies model predicting fox population growth rate (Eq. 2, n ¼ f ...
... is still growing nearly exponentially so that this population has not yet experienced competition for food resources. Therefore it is not surprising that strong density dependence has not been achieved thus far in that zone. The multispecies model predicting fox population growth rate (Eq. 2, n ¼ f ...
- Centre for Biodiversity Theory and Modelling
... of species i, and ε i is a random variable representing variability in population growth rates not represented by s. If all ai values are assumed <0, then an increase in an environmental stressor, s(t), will cause a decrease in the per capita growth rate of all species i. This equation makes the sim ...
... of species i, and ε i is a random variable representing variability in population growth rates not represented by s. If all ai values are assumed <0, then an increase in an environmental stressor, s(t), will cause a decrease in the per capita growth rate of all species i. This equation makes the sim ...
Research frontiers in null model analysis
... other words, can the patterns in the real data be reproduced in a simple model that does not incorporate biologically important mechanisms? Or, do the data appear non-random with respect to the null hypothesis? If so, the analysis provides some evidence in support of the mechanism (although it never ...
... other words, can the patterns in the real data be reproduced in a simple model that does not incorporate biologically important mechanisms? Or, do the data appear non-random with respect to the null hypothesis? If so, the analysis provides some evidence in support of the mechanism (although it never ...
Population Viability Analysis Annual Review of Ecology and
... populations, the target of most PVA (121). In a sense, the distinction between deterministic and stochastic processes in ecology is artificial because all ecological processes are stochastic. Maynard Smith (97) points out that "the use of deterministic rather than stochastic models can only be justi ...
... populations, the target of most PVA (121). In a sense, the distinction between deterministic and stochastic processes in ecology is artificial because all ecological processes are stochastic. Maynard Smith (97) points out that "the use of deterministic rather than stochastic models can only be justi ...
Kratina Food Web Persistence 2015 Accepted
... predator, prey, and nonprey species, we investigated how predation risk of susceptible prey is ...
... predator, prey, and nonprey species, we investigated how predation risk of susceptible prey is ...
Living where the flow is right: How flow affects
... The vast majority of colonial animals such as corals, hydrozoans, ascidians, and bryozoans are benthic suspension feeders that depend on currents of water to supply nutrients, eliminate wastes, and disperse gametes and larvae. The effect of velocity of flow on the capture of food is especially impor ...
... The vast majority of colonial animals such as corals, hydrozoans, ascidians, and bryozoans are benthic suspension feeders that depend on currents of water to supply nutrients, eliminate wastes, and disperse gametes and larvae. The effect of velocity of flow on the capture of food is especially impor ...
Seasonal species interactions minimize the impact of species
... Abstract. Many of the observed species interactions embedded in ecological communities are not permanent, but are characterized by temporal changes that are observed along with abiotic and biotic variations. While work has been done describing and quantifying these changes, little is known about the ...
... Abstract. Many of the observed species interactions embedded in ecological communities are not permanent, but are characterized by temporal changes that are observed along with abiotic and biotic variations. While work has been done describing and quantifying these changes, little is known about the ...
28.3 What Are The Effects Of Predator–Prey Interactions?
... 28.1 Why Are Interactions In Ecological Communities Important? Community interactions influence evolutionary change. • When members of different populations interact with one another, they may influence each other’s ability to survive and reproduce. • Community interactions, therefore, serve as a ...
... 28.1 Why Are Interactions In Ecological Communities Important? Community interactions influence evolutionary change. • When members of different populations interact with one another, they may influence each other’s ability to survive and reproduce. • Community interactions, therefore, serve as a ...
Spatial patterns of weeds along a gradient of landscape complexity
... A major current issue in ecology concerns the identification and the explanation of the spatial pattern in ecological communities (Wiens 1989; Liebhold & Gurevitch 2002). Spatial patterns can result from a combination of processes acting at different scales. At fine spatial scales, many processes un ...
... A major current issue in ecology concerns the identification and the explanation of the spatial pattern in ecological communities (Wiens 1989; Liebhold & Gurevitch 2002). Spatial patterns can result from a combination of processes acting at different scales. At fine spatial scales, many processes un ...
Plant species traits are the predominant control on
... for long-term litter decomposition within biomes (Berg et al. 1993; Moore et al. 1999; Raich et al. 2006; Parton et al. 2007). In contrast, interspecific differences in green leaf traits and the subsequent quality of litter produced following leaf senescence are associated with the diversity of plan ...
... for long-term litter decomposition within biomes (Berg et al. 1993; Moore et al. 1999; Raich et al. 2006; Parton et al. 2007). In contrast, interspecific differences in green leaf traits and the subsequent quality of litter produced following leaf senescence are associated with the diversity of plan ...
Behavioural and physiological traits to thermal stress tolerance in
... ecological dominance, not because levels of aggression determine dominance success, but because aggression is a manifestation of dominance. In these cases, ant species have been grouped into transitive hierarchies of interacting species with superior competitors behaviourally excluding subordinate s ...
... ecological dominance, not because levels of aggression determine dominance success, but because aggression is a manifestation of dominance. In these cases, ant species have been grouped into transitive hierarchies of interacting species with superior competitors behaviourally excluding subordinate s ...
Components of breeding performance in two competing species
... that the progressive occupation of low quality territories as breeding density increases causes a decline in the mean per capita fecundity of a population while variation in fecundity increases. Several studies have supported the habitat heterogeneity hypothesis by correlating variation in the mean ...
... that the progressive occupation of low quality territories as breeding density increases causes a decline in the mean per capita fecundity of a population while variation in fecundity increases. Several studies have supported the habitat heterogeneity hypothesis by correlating variation in the mean ...
Niche theory and guilds
... Ecological niches can thus be defined in terms of: -response functions: how species are distributed on environmental gradients with respect to limitation and optimal performance (a physiological view, prevalent among plant ecologists), i.e., a species’ response to the environment (Grinnell, Elton) ...
... Ecological niches can thus be defined in terms of: -response functions: how species are distributed on environmental gradients with respect to limitation and optimal performance (a physiological view, prevalent among plant ecologists), i.e., a species’ response to the environment (Grinnell, Elton) ...
HighFour Biology Round 4 Category C: Grades 9 – 10 Tuesday
... skeletal structures secreted primarily by corals. Some coral reefs also exist in cold, deep waters. ...
... skeletal structures secreted primarily by corals. Some coral reefs also exist in cold, deep waters. ...
Effective Population Size, Gene Flow, and Species Status in a
... decades [15], during which time the increased availability of multi-locus sequence datasets and methodological advances have made much more precise demographic inferences possible. In this study, we examine the patterns of genetic diversity and divergence in these two species using sequence data fro ...
... decades [15], during which time the increased availability of multi-locus sequence datasets and methodological advances have made much more precise demographic inferences possible. In this study, we examine the patterns of genetic diversity and divergence in these two species using sequence data fro ...
Interspecific Interactions in Phytophagous Insects: Competition
... bivorous insects consisted mainly of observational studies of resource parti tioning (e.g. 108, 143, 147, 179, 184). The rationale for such studies stemmed from classical competition theory, which predicted that two species could not occupy the same niche and coexist, and that coexistence could be ...
... bivorous insects consisted mainly of observational studies of resource parti tioning (e.g. 108, 143, 147, 179, 184). The rationale for such studies stemmed from classical competition theory, which predicted that two species could not occupy the same niche and coexist, and that coexistence could be ...
Speciation - KSU Web Home
... Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings ...
... Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings ...
Interacting environmental mosaics drive geographic variation in
... Abstract Although theory suggests geographic variation in species’ performance is determined by multiple niche parameters, little consideration has been given to the spatial structure of interacting stressors that may shape local and regional vulnerability to global change. Here, we use spatially ex ...
... Abstract Although theory suggests geographic variation in species’ performance is determined by multiple niche parameters, little consideration has been given to the spatial structure of interacting stressors that may shape local and regional vulnerability to global change. Here, we use spatially ex ...
Effects of body size and resource availability on
... supporting the hypothesis that competition influences dispersal rates. Small snails of both species, in contrast, always dispersed at relatively higher rates than larger individuals, but were not influenced by variation in resource levels. This result corroborates other studies that have shown reduc ...
... supporting the hypothesis that competition influences dispersal rates. Small snails of both species, in contrast, always dispersed at relatively higher rates than larger individuals, but were not influenced by variation in resource levels. This result corroborates other studies that have shown reduc ...
Part I: chapters, but I will cover them rapidly. The outlines will be
... Chapter 53: Population Ecology The next three chapters on population, community, and ecosystem ecology provide the academic backbone for this unit on ecology. Each chapter is a different organizational level in ecology, starting with population ecology. Before beginning your study of each chapter, b ...
... Chapter 53: Population Ecology The next three chapters on population, community, and ecosystem ecology provide the academic backbone for this unit on ecology. Each chapter is a different organizational level in ecology, starting with population ecology. Before beginning your study of each chapter, b ...
