Answer:
Algal blooms can reduce the ability of fish and other aquatic life to find food and can cause entire populations to leave an area or even die. ... Nutrient pollution fuels the growth of harmful algal blooms which have negative impacts on aquatic ecosystems.
Explanation:
Human and the natural ones can change the ecosystem
Answer:
Oxygen is a colourless, odourless, tasteless gas essential to living organisms, being taken up by animals, which convert it to carbon dioxide; plants, in turn, utilize carbon dioxide as a source of carbon and return the oxygen to the atmosphere.
Answer:
producers
Explanation:
producers are plant which are at the base of an ecosystem.
