A drought hits the habitat of a semi aquatic bird population all Ponroy up in the fish population decline. There are two groups of birds in the population of different leg length and diet. Long legged birds, eat fish while short legged birds eat insect the drought has little affect on insect population what is the main selective pressure in the scenario?

Answer 1

The main selective pressure in this scenario is likely competition for the diminishing fish population. Since the drought has caused a decline in the fish population, the long-legged birds that primarily feed on fish will face increased competition for this limited food source. This competition for food could potentially lead to reduced survival and reproductive success for the long-legged birds, putting pressure on them to adapt and find alternative food sources or outcompete the short-legged birds for insects.