The main selective pressure in this scenario is the fish population. The drought leads to the drying up of ponds and a decline in fish populations, which directly affects the long-legged birds that depend on fish for food. Since the short-legged birds eat insects, which are less affected by the drought, they are less impacted by the changing conditions.
A drought hits the habitat of a semi-aquatic bird population. All ponds dry up, and fish populations decline. There are two groups of birds in the population that differ in leg length and diet. Long-legged birds eat fish, while short-legged birds eat insects. The drought has little effect on insect populations.
What is the main selective pressure in this scenario?
(1 point)
Responses
drought
drought
insect population
insect population
fish population
fish population
leg length
1 answer
1 answer