this question completely lost me. any ideas?

“you are the water quality director for derry county. in this capacity, you are asked to review reports of two fish kills in the county. both involve artificial ponds with surface areas of approximately 0.8 hectares and maximum depths of 7 meters. tests performed immediately after the fish kills detected no pesticides or other poisons. the dead fish showed no signs of fungal attacks or other disease. case a involves a pond stocked with bass and used for recreational fishing. meteorological research show that the kill occurred after 4 weeks of hot weather in which daytime temperatures reached 35-40 degrees celsius. case b involves a pond stocked with bluegill and used to irrigate pastureland. this kill occurred in the spring, before the heat wave and 9 days after a heavy rain. the file for case b contains a photo showing dead fish floating in the pond. you also notice what appear to be mats of decaying algae floating on the surface of the water. a call to the farmer reveals that he applied ammonium nitrate to the pastureland the week before the rain. state your judgment as to the probably causes of these fish kills, and describe the chain of events that led to each.”

2 Responses to “probable causes of fish kills?”