Wild Tobago

Jahson Alemu, Marine Biologist, talks about coral reef health, and the important balance that some species contribute in unimagined ways. This feature was first published in the Tobago Newsday on Thursday, 19th January 2017. It’s relatively common knowledge that beautiful white sand beaches and reefs of tropical areas around the world exist largely thanks to parrotfish droppings. But fish urine is also important for maintaining a healthy reef. Corals thrive in low nutrient environments and the conservation of these globally imperilled ecosystems is largely dependent on mitigating the effects of anthropogenic nutrient enrichment. A recent study published in Nature Communications provides a novel perspective on the connectivity between corals and reef fish, where reef fish act as suppliers of key nutrients (nitrogen and phosphorus) to corals. When fish urinate, they release phosphorus and nitrogen into the water (both of which are crucial to the survival and growth of coral reefs)...