By dividing the amount of work done by the time it takes to do it; by dividing energy used in a given period by time.
Answer:
Large rain events
Explanation:
They can also rapidly circulate the water in a lake or pond, causing changes in the position of oxygen rich water in a short period of time. This quick 'turnover' of the water can quickly decrease the amount of oxygen available to fish, essentially causing them to suffocate.
