Analyze the Arctic food web shown here. Which statement describes why harbor seals are considered keystone species in their ecosystem? Select ALL that apply.
Responses
A Harbor seals are not the most numerous organism in the food chain compared to their critical role.Harbor seals are not the most numerous organism in the food chain compared to their critical role.
B Harbor seals are mobile through the ecosystem and can transfer nutrients to different areas of the ecosystem.Harbor seals are mobile through the ecosystem and can transfer nutrients to different areas of the ecosystem.
C Harbor seals are the most numerous species in the ecosystem, outnumbering other species in biomass and density.Harbor seals are the most numerous species in the ecosystem, outnumbering other species in biomass and density.
D Harbor seals are the highest trophic level of the food chain, so all species eventually move energy into this trophic level.Harbor seals are the highest trophic level of the food chain, so all species eventually move energy into this trophic level.
E Harbor seals prey upon organisms lower on the food web and provide food for organisms higher on the food chain, supporting both upper and lower trophic levels.
A Harbor seals are not the most numerous organism in the food chain compared to their critical role.
B Harbor seals are mobile through the ecosystem and can transfer nutrients to different areas of the ecosystem.
E Harbor seals prey upon organisms lower on the food web and provide food for organisms higher on the food chain, supporting both upper and lower trophic levels.