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How does community size influence the number of species it can support?
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How does component species interactions restrict or enhance the presence of other species?
What is a keystone specie? Give some examples.
Difference between food web and food chain
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- According to the resource-ratio hypothesis (a.k.a. R-star), what factor(s) will determine the maximum number of competing species that could possibly coexist in a community? (Note: either one or more-than-one answer could be correct) .what does the number of limiting resources in a community tell us? The number of limiting resources in the community The net primary productivity of the community (NPP). The number of trophic levels that are present in the community. | The intrinsic rate of increase (r) of each species in the community. The colonization rate of each species that can access the habitat.What explains the correlation between species richness and disturbance frequency?What roles do competitive exclusion and character displacement play in community structure? Successional sequences are altered by consumers of pioneer species. What ecological features of the pioneer species contribute to this phenomenon? Describe the two key elements of community stability.
- What is competitive exclusion? Choose All That Apply an antagonistic interaction between populations of two different species when one species outcompeting another species for resources an interaction between two species that can result resource partitioning an interaction that is not a factor in determining niches in a communityWhat is a benefit of uniform dispersion? decreased competition increased resources easier reproduction increased competitionSpecies 1K1 (Carrying capacity of Species 1) = 1,000r1 (Intrinsic rate of increase of Species 1) = 0.02 Species 2K2 (Carrying capacity of Species 2) = 400r2 (Intrinsic rate of increase of Species 2) = 0.05Which one will recover from disturbances more quickly? Species 1 Species 2
- 1) Which of the following defines the niche of a species? The role of a species in its community as well as the conditions it requires and the interactions it takes part in All populations of all species in some area The type of environment in which a species lives The number of species and their relative abundance within a community 2) Which of the following is an example of a biological factor that can affect community structure? Tropical regions support a high species diversity by receiving the most sunlight energy. The high temperatures of desert regions limit which species can live there. A plant species can live only in regions with a suitable level of rainfall. An insect herbivore inhibits the population growth of a tree species. 3)Which of the following prey defensive adaptations involves two or more prey species coming to resemble one another? Camouflage Startle displays…why does intraspecific competition increase niche breadthWhat is one way in which temporal changes in community species composition negatively impact delivery of an ecosystem service?
- How does a positive interspecific distribution-abundance relationship occur in ecology?The chart shows the average daily population growth rate and the competitive interaction strengths of seven species of algae. Species Growth rate Competitive interaction strength A 0.052 0.54 В 0.029 0.36 C 0.026 0.38 D 0.064 0.19 E 0.027 0.36 F 0.068 0.13 G 0.009 1.05 Which assemblage of species best fits the assumptions of the lottery model? Select one: a. F and G b. A, C, and F C. A, D, and F d. C, D, and F е. А, В, and G f. B, C, and EWhich of the following is least likely a result of competition? Increase in carrying capacity for both species Character displacement (populations possess different traits in the presence of similar species) Reduced niche breadth (smaller realized than fundamental niche) Resource partitioning