The feeding relationships among the species in a community determine the community's

(A) secondary succession.

(B) ecological niche.

(C) species richness.

(D) trophic structure.

Short Answer

Expert verified
  1. The option "secondary succession" isfalse.

  2. The option "ecological niche" isfalse.

  3. The option "species richness" is false.

  4. The option "trophic structure" is true.

Step by step solution

01

Community

In ecology, the social unit of interacting living organisms with specific common characteristics in a geographical area is called community.

02

Explanation of option '(A)'

The form of ecological succession in which changes occur in habitat due to the replacement of a damaged community by new inhabitants is called secondary succession.

Thus, the secondary succession is related to the re-colonization of organisms in an area.

Therefore, the given option is false.

03

Explanation of option '(B)'

When species utilize abiotic and biotic resources that determine their functional role in their natural environment, it is called an ecological niche,

Thus, the ecological niche is associated with the species that exist in the environment.

Therefore, the given option is false.

04

Explanation of option '(C)'

In evolutionary biology and ecology, the term species richness represents the count of species living in a defined area, such as an ecological community.

Thus, the species richness does not take into account the feeding relationship.

Therefore, the given option is false.

05

Explanation of option '(D)'

The way that shows the pattern of organisms' arrangement at different trophic levels based on their energy consumption is called a trophic level.

Thus, the trophic structure deals with the trophic level that shows the resource consumption by organisms in a food chain and represents their feeding relationship.

Therefore, the given option is true.

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Most popular questions from this chapter

In the Chesapeake Bay estuary, the blue crab is an omnivore that eats eelgrass and other primary producers as well as clams. It is also a cannibal. In turn, the crabs are eaten by humans and by the endangered Kemp’s Ridley sea turtle. Based on this information, draw a food web that includes the blue crab. Assuming that the top-down model holds for this system, describe what would happen to the abundance of eelgrass if humans stopped eating blue crabs.

The principle of competitive exclusion states that

(A) two species cannot coexist in the same habitat.

(B) competition between two species always causes extinction or emigration of one species.

(C) two species that have exactly the same niche cannot coexist in a community.

(D) two species will stop reproducing until one species leaves the habitat.

After examining Figure 52.19, you decide to study feeding relationships among sea otters, sea urchins, and kelp. You know that sea otters prey on sea urchins and that urchins eat kelp. At four coastal sites, you measure kelp abundance. Then you spend one day at each site and mark whether otters are present or absent every 5 minutes during the day. Graph kelp abundance (on the y-axis) versus otter density (on the x-axis), using the data below. Then formulate a hypothesis to explain any pattern you observe.

Rabies, a viral disease in mammals, is not currently found in the British Isles. If you were in charge of disease control there, what practical approaches might you employ to keep the rabies virus from reaching these islands?

Explain why adaptations of particular organisms to interspecific competition may not necessarily represent instances of character displacement. What would a researcher have to demonstrate about two competing species to make a convincing case for character displacement?

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