File - Mr. Greening`s Science
... 51. What would most likely occur after an ecosystem is disrupted by fire? A) The ecosystem would eventually return to its original state. B) The ecosystem would return to its previous state immediately. C) The ecosystem would evolve into a new ecosystem that is totally different from the ...
... 51. What would most likely occur after an ecosystem is disrupted by fire? A) The ecosystem would eventually return to its original state. B) The ecosystem would return to its previous state immediately. C) The ecosystem would evolve into a new ecosystem that is totally different from the ...
POPULATION ECOLOGY
... The simplest way to measure population density is to visually count the number of organisms in a given area. We can only reasonably do this if the area is small and the organisms are relatively large; for example, we can determine the number of gumbo limbo trees on an island in the Florida Keys. Nor ...
... The simplest way to measure population density is to visually count the number of organisms in a given area. We can only reasonably do this if the area is small and the organisms are relatively large; for example, we can determine the number of gumbo limbo trees on an island in the Florida Keys. Nor ...
effects of temperature on the size of aquatic ectotherms
... that relate temperature to size-at-stage. Any combination of the four mechanisms may operate on a given population. ...
... that relate temperature to size-at-stage. Any combination of the four mechanisms may operate on a given population. ...
The relative dominance hypothesis explains interaction dynamics in mixed species /
... 1 We used repeated measurements of tree growth and population-level and neighbourhood conditions from three mixed Alnus rubra/Pseudotsuga menziesii forests in the Pacific Northwest, USA to investigate why previous results regarding the importance of neighbourhood competition as a determinant of plan ...
... 1 We used repeated measurements of tree growth and population-level and neighbourhood conditions from three mixed Alnus rubra/Pseudotsuga menziesii forests in the Pacific Northwest, USA to investigate why previous results regarding the importance of neighbourhood competition as a determinant of plan ...
weakly density-dependent mortality and the coexistence of species
... Density dependence is ubiquitous in ecological interactions. However, in models it is generally only taken into account if it is sufficiently strong to be directly evident in experiments. This is particularly obvious in the mathematical treatment of mortality. Out of convention, mortality terms in m ...
... Density dependence is ubiquitous in ecological interactions. However, in models it is generally only taken into account if it is sufficiently strong to be directly evident in experiments. This is particularly obvious in the mathematical treatment of mortality. Out of convention, mortality terms in m ...
Single-species models for many
... maturation times of the consumer and resource respectively, then cycles in single-species models have periods that seldom exceed 4TC, as noted, whereas consumer resource cycles have periods seldom less than 4TC þ 2TR (Box 1). Next, the collapse from consumer-resource dynamics to singlespecies dynami ...
... maturation times of the consumer and resource respectively, then cycles in single-species models have periods that seldom exceed 4TC, as noted, whereas consumer resource cycles have periods seldom less than 4TC þ 2TR (Box 1). Next, the collapse from consumer-resource dynamics to singlespecies dynami ...
ABSTRACT Title of Dissertation: ECOLOGICAL DYNAMICS OF MACROLEPIDOPTERA
... trophic perspective, some host plant species provide increased protection from natural enemies at the expense of nutrition, and vice versa, potentially leading to trade-offs among hosts (Singer and Stireman 2005). Therefore a given plant host may provide a higher relative fitness in one stand of tr ...
... trophic perspective, some host plant species provide increased protection from natural enemies at the expense of nutrition, and vice versa, potentially leading to trade-offs among hosts (Singer and Stireman 2005). Therefore a given plant host may provide a higher relative fitness in one stand of tr ...
Allee Effects, Immigration, and the Evolution of Species` Niches
... generation one expects fewer copies of that allele than in the previous generation. Turning this around, for selection to increase the frequency of this locally favored type, absolute fitness of the novel mutation has to exceed unity so that copies of the allele will be able to increase in numbers o ...
... generation one expects fewer copies of that allele than in the previous generation. Turning this around, for selection to increase the frequency of this locally favored type, absolute fitness of the novel mutation has to exceed unity so that copies of the allele will be able to increase in numbers o ...
Interspecific Abundance-Range Size Relationships
... at low densities will tend to be recorded from fewer localities than species that occur at high densities, even if they are actually equally widely distributed. Indeed, it is not unknown for locally rare species, originally thought to have very restricted ranges, to be found to be considerably more ...
... at low densities will tend to be recorded from fewer localities than species that occur at high densities, even if they are actually equally widely distributed. Indeed, it is not unknown for locally rare species, originally thought to have very restricted ranges, to be found to be considerably more ...
Allee Effects, Immigration, and the Evolution of Species
... generation one expects fewer copies of that allele than in the previous generation. Turning this around, for selection to increase the frequency of this locally favored type, absolute fitness of the novel mutation has to exceed unity so that copies of the allele will be able to increase in numbers o ...
... generation one expects fewer copies of that allele than in the previous generation. Turning this around, for selection to increase the frequency of this locally favored type, absolute fitness of the novel mutation has to exceed unity so that copies of the allele will be able to increase in numbers o ...
Community assembly, coexistence and the environmental filtering
... clearly establish the role of abiotic tolerances in determining community membership. For example, shifts in species abundances across the landscape often reflect changes in both biotic and abiotic factors (e.g. the realized niche of a species) rather than purely abiotic factors (the fundamental nic ...
... clearly establish the role of abiotic tolerances in determining community membership. For example, shifts in species abundances across the landscape often reflect changes in both biotic and abiotic factors (e.g. the realized niche of a species) rather than purely abiotic factors (the fundamental nic ...
The Effect of Sowing Season on the Reliability of Direct
... effects of sowing at different times of the year. To use less seed in direct seeding, we need to ensure that seed is sown when it has the highest chance of germinating, in order to avoid losses from predation, desiccation and disease. Aims/Objectives The trial aimed to determine whether: 1. Some spe ...
... effects of sowing at different times of the year. To use less seed in direct seeding, we need to ensure that seed is sown when it has the highest chance of germinating, in order to avoid losses from predation, desiccation and disease. Aims/Objectives The trial aimed to determine whether: 1. Some spe ...
Functional traits of woody plants: correspondence of species
... stored in the freezer until analysis. Stem (wood) density of field adults was measured on three 0.1- 0.2 m segments of branches which were at least six years old, each segment coming from a different site within the study area. Mean trait values were first calculated per plant, then per population a ...
... stored in the freezer until analysis. Stem (wood) density of field adults was measured on three 0.1- 0.2 m segments of branches which were at least six years old, each segment coming from a different site within the study area. Mean trait values were first calculated per plant, then per population a ...
Annual Reviews of Ecology, Evolution and Systematics
... 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 ...
Competitive avoidance not edaphic specialization drives vertical
... 2014). Alternatively, the vertical variation in EM fungal communities may not be attributable to resource heterogeneity, but rather to differential tolerances for environmental conditions. A number of abiotic conditions change with soil depth, such as temperature, water content, and oxygen availabil ...
... 2014). Alternatively, the vertical variation in EM fungal communities may not be attributable to resource heterogeneity, but rather to differential tolerances for environmental conditions. A number of abiotic conditions change with soil depth, such as temperature, water content, and oxygen availabil ...
Maureen McClung - Biology Department | UNC Chapel Hill
... presented populations of cadmium-intolerant Drosophila melanogaster with both cadmium-free and cadmium-laced media. He found that populations experiencing high competition (high density) were more likely to develop cadmium-tolerant flies after several generations since there was less competition for ...
... presented populations of cadmium-intolerant Drosophila melanogaster with both cadmium-free and cadmium-laced media. He found that populations experiencing high competition (high density) were more likely to develop cadmium-tolerant flies after several generations since there was less competition for ...
500 AP Exam Questions - Mr. D`s Science Page
... ADVANCED PLACEMENT ENVIRONMENTAL SCIENCE PRACTICE EXAM ...
... ADVANCED PLACEMENT ENVIRONMENTAL SCIENCE PRACTICE EXAM ...
The Living World
... All organisms that live together in an area are called a community The different species compete and cooperate with each other to make the community stable A community is often identified by the presence of its dominant species The distribution of the other organisms may differ a good deal However, ...
... All organisms that live together in an area are called a community The different species compete and cooperate with each other to make the community stable A community is often identified by the presence of its dominant species The distribution of the other organisms may differ a good deal However, ...
The Living World - Chapter 32 - McGraw Hill Higher Education
... All organisms that live together in an area are called a community The different species compete and cooperate with each other to make the community stable A community is often identified by the presence of its dominant species The distribution of the other organisms may differ a good deal However, ...
... All organisms that live together in an area are called a community The different species compete and cooperate with each other to make the community stable A community is often identified by the presence of its dominant species The distribution of the other organisms may differ a good deal However, ...
Modelling coevolution in multispecies communities
... 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 species as B, I, and T . Two species are said to belong to the same trophic species if they sh ...
... 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 species as B, I, and T . Two species are said to belong to the same trophic species if they sh ...
arXiv:adap-org/9801003v1 16 Jan 1998
... 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 species as B, I, and T . Two species are said to belong to the same trophic species if they sh ...
... 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 species as B, I, and T . Two species are said to belong to the same trophic species if they sh ...
51 - edl.io
... 9. Most efforts to improve environmental quality have focused on this. 10. Capable of being decomposed by organisms, such as bacteria 11. Which of the following statements regarding developed countries and developing countries is true? a) Developed countries are home to twice as many people as devel ...
... 9. Most efforts to improve environmental quality have focused on this. 10. Capable of being decomposed by organisms, such as bacteria 11. Which of the following statements regarding developed countries and developing countries is true? a) Developed countries are home to twice as many people as devel ...