In a trophic pyramid the broader the base of primary producers, the more biomass

Question

In a trophic pyramid the broader the base of primary producers, the more biomass that can be supported in upper levels.

True or False .... please explain

In a successional community, some kinds of organisms like fungi or beetles are present in every stage of succession. However, the particular species of fungi or beetles that may be there at the earliest stages of succession are often not the same species present in the last successional stage. This is a result of:

In a trophic pyramid the broader the base of primary producers, the more biomass that can be supported in upper levels.

True or False .... please explain

In a successional community, some kinds of organisms like fungi or beetles are present in every stage of succession. However, the particular species of fungi or beetles that may be there at the earliest stages of succession are often not the same species present in the last successional stage. This is a result of:

a. biogeochemical cycles that change with each stage of succession. b. changes in plant communities during succession that support different animal communities. c. the fact that species in an early successional community will always be in their fundamental niche, and later stages only allow species to occupy their realized niche. d. the fact that predators and herbivores are not a part of the community until the last stage of succession.

Explanation / Answer

True.

Trophic pyramids expresses the food or energy relationship between oraganisms at different trophic level.It can be expressed in terms of number, biomass or energy.In a trophic pyramid the base of each pyramid represents the producers(first trophic level)and broader the base more is the number/biomass of producers.

So, when producers are more it can support more number of primary consumers(2nd trophic level) . Similarly when there is increase in 2nd trophic level it can support more number of secondary consumers(3rd trophic level).And finally more secondary consumers can support more tertiary consumers.

(b) changes in plant communities duing succession that support different animal communities.

In ecological succession plant communities keep on changing so the species that depends on earlier plant may not be able to survive on the next plant community so we find another species of fungi or beetles.For example- in ecological succession in water phytoplanktons are pioneers which are replaced by free floating angiosperms then by rooted hydrophytes, grasses and finally trees. So any species of fungi or beetle that can survive on free floating angiosperms may not be able to survive on trees so there will be another species of beetle that can live on it.

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.