based on the information above, which ecosystem most likely experienced a recent population bottleneck? responses ecosystem a, because its low genetic diversity could have resulted from an event that reduced the variation in the gene pool. ecosystem a, because its low genetic diversity could have resulted from an event that reduced the variation in the gene pool. ecosystem b, because its high species diversity could have resulted from increased competition among its members. ecosystem b, because its high species diversity could have resulted from increased competition among its members. ecosystem c, because its low habitat diversity indicates an increase in available niches.