Why do you think corals have declined since 1977

the coral have declined since 1977 for many reasons as folows

1. there are has being too much of heavy stress from invasive pathogens, overfishing has being a major threat to the coral toocoastal pollution of any sort has being a threat to coral increase or that has led to their decline since 1977tourism is also a reason for the decline and now global warming that's heating up the oceans

Explanation:

Wetlands form where water and land meet. a lake with a wetland fringe can fill in with decayed plant and animal material to become a wet meadow. a pond can fill in to become a bog or fen. sediment can fill in a river marsh to become a swamp.flooding of coastal lowlands from rising sea levels has created broad coastal marshes that are protected from wave action by barrier islands or reefs. coastal wetlands also form when rivers deposit sediment as they reach the ocean. plants then take root and hold the soil firm against the forces of tides and waves.

Ithink that its like 15 mph.