How does silting of water bodies affect aquatic life 1 It results into increased rates of egg ...........

Environment and Ecology Air Pollution

How does silting of water bodies affect aquatic life?

1) It results into increased rates of egg survival causing population boom in water bodies.

2) Coral polyps grow more favourably in silted and shallow water bodies.

3) Silt acts as a vehicle for certain pesticides into water bodies which adversely affect aquatic life.

Select the correct answer using the codes below.

1 only

3 only

2 and 3 only

1,2 and 3

Statement 1 :- It affects the spawning ground of fisheries and their egg laying patterns. As bed gravel become compacted , space for eggs is taken up by silt that considerably affects egg survival rates in water.
Statement 2 :- Hard bottom communities like coral and mussel banks (including oysters) are more sensitve to siltation. Siltation adversely affects coral population.
Statement 3 :- For e.g in rural areas the erosion source is typically soil degradation due to intensive or inadequate agricultural practices,leading to soil erosion,especially in fine-grained soils such as loess. The result will be an increased amount of silt and clay in the water bodies that drain the area often adding unwanted fertilizers to these bodies.