Reef aquarists know what happens when they allow the pH of their tanks to drop. Corals are affected adversely. Scientists are warning that increasing amounts of carbon dioxide entering the atmosphere as a result of human activities are contributing to coral reef destruction worldwide due increased acidification of the ocean. Add this to the other stresses to which reefs are subjected, and we have a recipe for ecological disaster. These days, reef biologists continually refer to “the coral reef crisis,” by which is meant the accelerated loss of reefs that has taken place in the past few decades.
No one argues that reefs are in trouble worldwide. Most of the scientific disagreement regards the exact nature of the particular stress(es) responsible for local observations of reef degradation. It is often difficult, if not impossible, to tease out a single destructive factor from the plethora of insults to which reefs are subjected on a daily basis. Pollution, overfishing, and climate change all take a toll. The cumulative result of all these problems has been the loss of as much as one-fourth of the world’s reefs.
The Caribbean Coral Reef Institute, a cooperative effort between the University of Puerto Rico and the National Oceanic and Atmospheric Administration, lists bleaching, disease, eutrophication, invasive species, overfishing, physical damage, pollution, and sedimentation as threats. http://ccri.uprm.edu/threats.html
The World Resources Institute has estimated that 58 percent of reefs worldwide are threatened by human activities. Of these, the most critically endangered are those in Southeast Asia, the primary source of specimens for the aquarium trade. Over 80 percent of that region’s reefs, according to a WRI report, are under siege. The organization identified five “hot spots” of reef destruction. Topping the list was the Philippines, followed by Indonesia, Tanzania, the Comoros Islands, and the Lesser Antilles in the Caribbean. http://pdf.wri.org/reefs.pdf
The world has only about 225,000 square kilometers of coral reefs. This sounds like a lot, but it represents only about one-third the area of Texas, or ten times that of New Jersey. Despite the relatively small number of reefs, it is estimated they provide economic benefits in the range of US$30 billion per year worldwide. Tourism accounts for a large proportion of the economic activity generated by reefs, and is adversely affected when reefs are damaged. In the late 90s, for example, about half the corals in Palau died from a major bleaching event, and by 2001 tourism had declined as much as ten percent.
A tiny fraction of both economic benefit and reef destruction, of course, is accounted for by the aquarium trade. The most recent estimate I could find placed the value of the US aquarium trade in reef organisms at half a billion dollars.
You can read the bad news about reefs for yourself in the reports cited. What are the implications for the aquarium trade? The Pacific Fisheries Coalition says aquarium collecting harms reefs in Hawaii. http://www.pacfish.org/wpapers/aquarium.html The American Association for the Advancement of Science in a 2001 report said “There is an urgent need to develop positive trade regimes so that only products from reefs under sustainable management plans are allowed into or out of the U.S., to ensure that consumer demand by Americans is not contributing to the decline and degradation of coral reefs.” http://www.aaas.org/international/africa/coralreefs/Coral_Reefs.pdf
The aquarium trade remains in focus as a contributor to reef degradation. The issues, therefore, remain much as they were a decade ago. Rather than being seen as a tool for education about reefs and reef conservation, the aquarium trade is seen as part of the problem. The most significant effort to address the problem by the aquarium industry, the Marine Aquarium Council www.aquariumcouncil.org , is widely considered to be impotent. While MAC promises that certification leads to healthier fish and lower mortality, the retail dealers with whom I have spoken say this is not the case. Many cite problems associated with handling by wholesalers and difficulties related to air cargo shipment. These problems as equal to, or greater than, those arising from destructive fishing practices, the issue that spawned MAC in the first place.
One thing is for sure, as reefs decline, calls for regulation of the marine aquarium trade will increase. Efforts to discourage marine aquarium keeping have become quite sophisticated. Check out the video link below, posted exactly one year ago today. Be warned. If you think the marine aquarium hobby does more good than harm, the video will likely offend you. But rather than getting your dander up, try to think of what the hobby and industry might do to counter such criticism. Email me with your ideas.