The scientist found that as plant E started dying, the amount of bacteria in the pondstarted increasing. At the same time, the amount of oxygen in the pond starteddecreasing.

Eutrophication, part of the natural ageing process for bodies of water such as ponds or lakes, occurs due to a build-up of nitrates and phosphates over time. These compounds, often found in fertilisers, are plant nutrients that stimulate the growth of plants and algae in the water. As the amount of plant matter in the pond increases, more plants start to die off. Bacteria that decompose the dead plants also consume the oxygen in the water, so fish and other water animals soon die for lack of oxygen. The pond eventually becomes choked with plant matter and grows shallower. Ultimately, as shrubs grow where water once was, the pond dies.Which organisational structure does this text primarily use?

IAE3 Identify which of the species would start to die first if the lake water started to increase in acidity.frogssnailsclamsperchtrout

Explain why the rapid removal of oxygen from sea water leads to the deaths of many plants and animals.

Which of the following is main cause of fish killing in ponds a.All b.DOc.pHd.Algal Bloom

In a village in Karnataka, people started cultivating crops allaround a lake which was always filled with water. They addedfertilisers to their field in order to enhance the yield. Soon theydiscovered that the waterbody was completely covered with greenfloating plants and fish in the lake started dying in large numbers.Analyse the situation and give reasons for excessive growth ofplants and death of fishes in the lake.