pioneer community has fewer species
middle stages communities are most diverse
max community has the greatest number of species
total biomass of the community increases as succession progresses
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The observation that is not true concerning succession is D. total biomass of the community increases as succession progresses.
Succession is the gradual process of change in the composition of a community of species over time. The stages of succession are characterized by changes in the physical environment and the community of organisms that inhabit it.
However, option D is not true. The total biomass of a community does not necessarily increase as succession progresses. In fact, it may decrease at certain stages of succession, particularly during periods of stress or competition for resources. The total biomass of a community is influenced by many factors, including the availability of resources, the efficiency of nutrient cycling, and the interactions between species. Therefore, it cannot be generalized that the total biomass always increases as succession progresses.
The correct answer is C. max community has the greatest number of species.
The climax community, also known as the max community, is the final stage of succession. While it's true that the climax community is often more diverse than the pioneer community, it's not always the case that it has the greatest number of species.
In fact, the middle stages of succession, often referred to as the transitional or seral stages, can have the highest species diversity. This is because these stages often have a mix of pioneer and climax species, as well as species that are adapted to the changing environmental conditions.
The other options are correct:
- A. Pioneer community has fewer species: Pioneer species are often hardy and adaptable, but there may be fewer species present in the early stages of succession.
- B. Middle stages communities are most diverse: As mentioned earlier, the middle stages of succession can have the highest species diversity.
- D. Total biomass of the community increases as succession progresses: As succession progresses, the total biomass of the community often increases as more species are added and the ecosystem becomes more complex.
