Predation and increased oxygen availability are plausible explanations for increases in diversity during the cambrian.
The Cambrian Explosion refers to the sudden appearance in the fossil record of complex animals with mineralized skeletal remains . Evolution affected the lifestyle . They become flexible , nervous system , circulatory system , digestive system , a lot of different body plans.
Predation can have large effects on prey population and on community structure. Predators can increases diversity in community by preying on competitive dominate species or by reducing consumer pressure on foundation species. Predation can increase , decrease or leave unchanged diversity.
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