Final answer:
Succession in a small pond on a cow pasture occurs when there is a disturbance in the ecosystem. The presence of cattle and proximity to farm land can have both positive and negative effects on local populations of fish, frogs, and aquatic insects in the pond.
Step-by-step explanation:
Succession in a small pond on a cow pasture occurs when there is a disturbance in the ecosystem. In primary succession, if the pond is newly formed, pioneer species like algae and bacteria will colonize the bare rock or soil. As they grow and die, they contribute to soil formation, allowing plants like grasses and lilies to take root. Over time, larger plants like shrubs and trees may establish themselves, creating a diverse aquatic habitat.
If the pond is affected by the presence of cattle and the proximity to farm land, it may have both positive and negative effects on local populations. The nutrients from manure can lead to increased plant growth and higher productivity in the pond. This can benefit organisms like fish, frogs, and aquatic insects that rely on plants for food and shelter. However, excessive nutrient input from agricultural runoff can also lead to eutrophication, causing algal blooms and oxygen depletion, which can be harmful to aquatic life. The noise and disturbance caused by cattle and farming activities can also disrupt the behavior and breeding patterns of these organisms.
In conclusion, the succession process in a small pond on a cow pasture involves the colonization of pioneer species, followed by the establishment of larger plants and the development of a diverse aquatic ecosystem. The placement of the pond near cattle and on farm land can have both positive and negative effects on the local populations of fish, frogs, and aquatic insects, depending on the level of nutrient input and disturbance.