Explain how fertilizer runoff can increase growth, decomposition and biological oxygen demand in aquatic systems.
Tę umiejętność sprawdza 11 zadań wzorowanych na arkuszach IB z lat 2023–2026.
Runoff rich in nitrate enters a small pond and stimulates eutrophication. Which pair of changes is expected during the developing algal bloom and subsequent decay? A. Less algal biomass and lower microbial oxygen demand B. More algal biomass and greater…
Repeated nitrate runoff stimulates a lake algal bloom, followed by increased decomposition. What is expected? A. Greater biochemical oxygen demand B. Immediate disappearance of all decomposers C. Conversion of nitrates into persistent plastic D. A universal…
Suggest two harmful consequences of adding more feed than the fish consume.
Phosphate fertilizer is applied to farmland. Discuss benefits and risks of this practice.
Describe possible consequences of untreated-sewage pollution in the river.
Phosphate becomes available to organisms through several processes. State two sources of phosphate in an ecosystem.
Runoff transports dissolved nitrogen fertilizers from cropland into a nearby lake. Outline possible effects on the lake ecosystem.
Explain how eutrophication affects biochemical oxygen demand.
Explain how eutrophication affects biochemical oxygen demand.
State one process by which phosphate can move from farmland into a river.
State one process by which phosphate can move from farmland into a river.
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