Organisms and populations, ecosystems, biodiversity and environmental issues.
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Q1 · Ecology and Environment · HARD
A pond ecosystem receives constant nutrient input from agricultural runoff. Initially, phytoplankton density increases rapidly, followed by a decline in dissolved oxygen levels leading to fish mortality. Which ecological principle best explains this sequence of events?
Q2 · Ecology and Environment · MEDIUM
A tropical rainforest is observed to have high species diversity but low population density for most species. Which ecological concept best explains this pattern?
Q3 · Ecology and Environment · EASY
In a grassland ecosystem, which organism would typically occupy the second trophic level?
Q4 · Ecology and Environment · EASY
Which of the following interactions is best exemplified by the relationship between clownfish and sea anemone?
Q5 · Ecology and Environment · EASY
In a grassland ecosystem, the biomass of producers is 15,000 kg, primary consumers is 1,500 kg, and secondary consumers is 150 kg. What is the approximate percentage of energy transfer efficiency from primary to secondary consumers?