2008 reef assessment: urgent action needed
From the abstract of Status of Coral Reefs of the World: 2008 posted on Reef Base:
- The Mesoamerican Barrier Reef System (MBRS/MAR) region has received increasing recent attention as a priority for international conservation organizations to provide more research and conservation effort;The report includes this assessment of the reefs from Cancun south to Belize:
- Human and natural threats are continuing, resulting in declining reef condition;
- Live coral cover has declined greatly while chronic human stresses escalate, in parallel with environmental changes and natural events. Coral cover on some reefs has declined by more than 50%;
- A 2006 comprehensive survey of 326 representative reefs revealed regional coral cover averaging 11% (11% Belize, 7.5% Mexico Yucatan, and 14.4% Honduras & Guatemala combined); but some sites have higher cover;
- Mesoamerican Barrier Reef System (MBRS) project found coral cover from 11–26% at 13 strategically selected sites from 2004–2005 (most/all within MPAs); 96 new surveys in 2007 to 2008 on shallow fore-reefs (2–5 m) in 6 Belize regions showed coral cover of 13%; total fish biomass had declined (average 49.8g per m2); coral and fish abundances are below the Caribbean average;
- Low coral cover indicates that reefs have not recovered from the 1998 bleaching and Hurricane Mitch;
- It is urgent to develop measures to increase reef resilience and lobby for stronger protection of reefs in good health.
These reefs have suffered from intense fishing activity since the 1960s and increasing pressure from tourism since the mid 1970s. Reef patches at Punta Nizuc and El Garrafon at Isla Mujeres have already been affected by tourism-related activities and the damage appears to be spreading elsewhere to Akumal, Puerto Morelos, Mahahual and Cozumel. Shallow reefs at Cancun, Sian Ka’an and Chinchorro have been affected by boat damage. The reefs just off the northern tip of the Yucatan Peninsula and immediately westward (Punta Mosquito, Boca Nueva, Piedra Corrida) have very little (<2%) coral cover.
0 comments:
Post a Comment