Aone-hectare pond is sampled in early september. the sample yields 1 small catfish as well as 17 benthic invertebrates that represent 10 species. if the pond is resampled a year later, which of the following would best indicate that the pond had been adversely affected by adjacent development? a) an uncommon species has become more numerousb) an increase in low-tolerance species has occurredc) a decrease in high-tolerance species has occurredd) phylogenetic diversity has occurrede) the biodiversity of the pond has decreased