Question 6 (1 point) How does heavy pollution affect biodiversity in the stream?

Question

Question 6 (1 point) How does heavy pollution affect biodiversity in the stream? Pollution lowers species richness and reduces the relative abundance of most species. Pollution lowers species richness and changes the relative abundance of most species. Pollution does not affect species richness but changes the relative abundance of most species. Pollution does not affect species richness but increases the relative abundance of most species Save Question 7 (1 point) Match each species with it's response to stream pollution. leech mayfly

Explanation / Answer

The correct answer to the question is Pollution lowers species richness and changes the relative abundance of most species

Reason:

Species richness and relative abundance are entirely different.

Species richness is defined as the availability of different species in a given ecological community. It is just a count of different species and it will not consider the number of each species.

In contrast to species richness, relative abundance is defined as the occurrence of common or rare species in relative to the total number of species in a given ecological community. In simple words, it tells us the number of common species present in the community.

With this background, let us find out the reason for the answer

Heavy pollution such as an excessive flow of fertilizers in water streams can favor the growth of only a few species and reduces the growth of other species. This lower species richness and changes the relative abundance of most species. In simple words, heavy pollution lowers species diversity (types of species) and changes the number of these species.

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