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http://www.nceas.ucsb.edu/Consensus/Consensus_Statement.doc^{Image Removed}

Basically, lots of scientists sign a concensus saying MPAs rock.

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            involvement) is critical to achieve this full range of benefits.  Marine protected areas do not provide the same benefits as marine reserves. 
Ecological effects outside reserve boundaries: 
1)      In the few studies that have examined spillover effects, the size and abundance of exploited species increase in areas adjacent to reserves. 
2)      There is increasing evidence that reserves replenish populations regionally via larval export. 
Ecological effects of reserve networks: 
1)      There is increasing evidence that a network of reserves buffers against the vagaries of environmental variability and provides significantly greater protection for marine communities than a single reserve.  
2)  An effective network needs to span large geographic distances and                       encompass and encompass a substantial area to protect against catastrophes and provide a                       stable a stable platform for the long-term persistence of marine communities.