What is the effect of maintaining the marine ecosystem?

Marine protection is driven by the showed negative impacts being found in our condition, for example, species misfortune, living space corruption and changes in biological community works and spotlights on restricting human-made harm marine environments, reestablishing harmed marine biological communities, and saving powerless species.  

Human effects on marine biological systems. Human exercises influence marine biological systems because of contamination, overfishing, the presentation of obtrusive species, and fermentation, which all effect on the marine nourishment web and may prompt generally obscure ramifications for the biodiversity and survival of marine living things.

they use tree rings to figure out weather patters.