text and data from datanuklets An estuary isa habnat tormed where a freshwater r

Question

text and data from datanuklets An estuary isa habnat tormed where a freshwater river or stream moots a saltwater ocean Runorrfrom rain washes initially increasos the local ecosystom lawn and and carries them to estuarios, where the nutrient excess as a consequence of human productivity leunrophication outrophication is the result of nutrient enrichment lyNand Pincoastal waters particular activity, such as urbanization and fertizer agriculture. as a byproduct. However, wth more in the ecosystem, thegowth of plants and algae explodes. During the day protosynthesize and release o2 the water, at the algae ts cause these same algae growdersely near the surface of the water. decreasing the lghtavailable to plants gowing below bottom without ligt, the plants die and their down increase and consume most of the o2 dissolved in the water ty decomposers Because there is so much dead plant material for decomposers they in density well is not enough o2 for aquatic animals such as fish and shellfish, and they begon to die as islaey to result in death or submergod underwateryalgae and plants sue to increased competition among plants for OC decreased oxygen in the water increased herbivory by fish and other primary consumers QUESTION T text and data from datanuggers ora To determine whether outrophication is occurring in the Plum Island ostuary.researchees measured the lovelsor dissolved o n the water, and the changes in the amount of dissolved o2 from dawn (sunrise) to dusk sunset) in this graph dissolved 02 was measured at two locations. Upper Estuary (tarther from the ocean) and Lower Estuary closer to the ocean) a

Explanation / Answer

Hi, as per our regulations the first question is answered.

The answer is option B.

The eutrophication results in a pond or lake or any water body, a hen high amount of nutrient often in excess which results in the abundant growth of algae or plants. In the current example, the eutrophication has occurred in estuarine water. The nutrient-rich runoff from the river has caused excessive growth of algae. The blockade of light due to excess algae on the water surface results in the death of plants under water. Hence the decreased availability of light causes the death of the submerged plants.

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