Ponds and lakes are natural ecosystems with a self-cleaning mechanism due to the presence of natural decomposers and other environmental factors, whereas aquariums are artificial ecosystems lacking these natural processes. Consequently, aquariums require regular cleaning to maintain water quality and the health of their inhabitants.
Elaboration:
Natural Ecosystems:
Ponds and lakes are considered natural ecosystems because they contain a variety of organisms, including producers, consumers, and decomposers, that work together to maintain a balanced environment. Decomposers, like bacteria and fungi, break down dead organic matter (like fallen leaves or dead fish), preventing the buildup of waste and pollutants.
Artificial Ecosystems:
Aquariums, on the other hand, are artificial ecosystems. They are man-made and often lack the full range of organisms and processes found in natural ecosystems. Specifically, they may not have enough decomposers to effectively break down waste, uneaten food, and the remains of deceased fish.
The Need for Cleaning:
Without the natural self-cleaning mechanisms of a natural ecosystem, waste accumulates in aquariums. This leads to poor water quality, increased levels of harmful byproducts, and potentially toxic conditions for the fish and other aquatic life. Regular cleaning, including water changes, filter maintenance, and removal of uneaten food, is necessary to maintain a healthy environment for the inhabitants of an aquarium.