In addition, a major concern for marine biologists is the effects of ecological collapse on the coral reefs (who based on fossil evidence are more vulnerable to extinction but also demonstrate greater resilience[17]). An effect of global climate change is the rising sea levels which can lead to reef drowing or coral bleaching.[17] Human activity, such as fishing, mining, deforestation, etc., serves as a threat for coral reefs by affecting the niche of the coral reefs. For example, Edinger and colleagues[18] demonstrate a correlation between a loss in diversity of coral reefs by 30-60% and human activity such as sewage and/or industrial pollution.