Which of these increases during ecological succession?
Species diversity often increases during ecological succession as habitat structure becomes more complex and additional niches develop. Pioneer communities contain relatively few stress-tolerant colonists. Their growth modifies light, temperature, soil, moisture, and organic matter, allowing new plants, decomposers, herbivores, predators, and mutualists to establish. Diversity may later level off or even decline if strong competitors exclude earlier species, so the trend is not universally monotonic. Biomass also usually increases as vegetation accumulates, which makes this item ambiguous beca
Ref: Ecology: Concepts and Applications, Molles, 9th Ed., Ch. 20