Shrimp farming and the tsunami

[Louis Proyect <lnp3@xxxxxxxxx>]

LA Weekly,  OCTOBER 22 - 28, 2004
The Shrimp Factor
Did disappearing mangrove forests contribute to the tsunami?s severity?
by Judith Lewis

Various ecological theories have been floated in the wake of last week?s 
lethal tsunami, which killed more than 150,000 people and left areas of 
South and Southeast Asia unimaginably devastated. Some have blamed the 
severity of the earthquake-spawned waves on global warming and its effects 
on the Indian Ocean?s sea level; others have targeted the U.S. Navy?s 
undersea sonar experiments for the intensity of the earthquake itself. But 
while the current level of the Indian Ocean can be debated (some argue it?s 
actually lower than usual this year), and the earthquake-generating power 
of sound in the ocean is dubious, there is no question that one human 
activity on the region?s developed coastlines contributed to the death 
toll: the cultivation of cheap shrimp, for which vast swaths of protective 
mangrove forests have been claimed and cleared.

According to a December 30 report by the Science and Development Network in 
India, the tsunami did less damage and swept away fewer lives in the 
Pichavaram and Muthupet regions in the southern Indian state of Tamil Nadu 
than it did in the Nagapattinam District. The difference: Pichavaram and 
Muthupet?s forests have been kept intact, while Nagapattinam?s had been 
replaced by more than 200 shrimp farms. (Most of them were illegal: India 
bars shrimp farming within 1,500 feet of the coastline, but the law is 
often ignored.) Similar reports resonated in the days following the 
disaster from around the Indian Ocean rim: On Penang Island in Malaysia, 
according to the international environmental organization Friends of the 
Earth, the Penang Inshore Fishermen Welfare Association acknowledged that 
mangrove forests reduced the impact of the tsunami; environmental activist 
Hemantha Withanage of the Sri Lankan Centre of Environmental Justice noted 
that forested areas suffered little damage compared to their clear-cut 
surroundings.

Mangroves, the diverse, salt-tolerant forests that grow in the intertidal 
zone between land and ocean, once covered three-fourths of the earth?s 
tropical coastlines. They typically provide coastal areas with two stages 
of protection, first with a lower-growth area where sediment collects in 
roots and gives the ocean floor a shallow shape that slows incoming swells, 
next with a layer of taller trees that break the force of the surf. Less 
than 50 percent of the forests that were present in 1960 remain, according 
to Alfredo Quarto of the Washington state?based Mangrove Action Project. 
Quarto calls mangroves "the rainforests of the sea," but unlike 
rainforests, mangroves are disappearing without much public attention ? as 
Quarto points out, governments have until recently considered them 
wastelands. And while tsunamis are infrequent enough that no one could have 
predicted the effects of the December 26 disaster, scientists in the recent 
past have noted the consequences of other natural disasters on coastlines 
stripped of their mangroves. In 1991, tropical Cyclone Marian struck 
Chittagong, Bangladesh, sending up a massive "tidal bore" that claimed 
138,000 lives; eight years later, a "super-cyclone" in Orissa on India?s 
east coast killed 10,000 people. In both instances, scientists around the 
world blamed the human toll on regional deforestation. Tom Spencer of the 
Cambridge Coastal Research Unit at Cambridge University, in an interview 
with New Scientist, claimed that the destruction of Orissa?s mangroves 
"left it wide open to attack by the wind and waves of the cyclones that 
regularly lash the coast of eastern India and neighboring Bangladesh.

"I am quite sure," he said, "that the loss of the mangroves was a 
contributory factor in the extent of the damage. In the past [they] would 
have dissipated the incoming wave energy."

Those mangroves were mostly cleared for cheap shrimp: "Prawn culture" has 
been a burgeoning industry in both Orissa and Chittagong in the past 15 
years. Four protesters were killed in Orissa in a 1999 demonstration 
against what Quarto calls a "boom and bust industry" that leaves 
"devastating ruin in its wake."

Like Orissa, Thailand also specializes in the tiger prawns so popular in 
this country, and many of its own mangroves have been sacrificed in recent 
years to the 250,000 tons of shrimp the country produces for the world 
every year. At the time of the tsunami, shrimp farms dotted the coastal 
provinces of Ranong, Phangga, Phuket and Krabi on Thailand?s coast. The 
region?s coral reefs have also deteriorated along with the mangroves, 
disturbing another protective barrier that, where it remained, saved lives. 
In the Surin Islands off Thailand?s west coast, where coral reefs remain 
largely intact, very few people died, even though the islands were directly 
in the tsunami?s path. Thai marine environmentalist Thon Thamrongnavasawadi 
told Andrew Browne of The Wall Street Journal that "most scrambled to 
safety as the first wave exploded against the coral." Coral demonstrated 
the same buffer effect in the Maldives, an island only three or four feet 
above sea level, where reefs were said to have broken up the tsunami. The 
death toll in the Maldives was 69.

No one is arguing that mangroves and coral could have stopped the tsunami?s 
devastation altogether, and no one is willing to speculate as to just how 
many lives could have been saved by virgin forests and undisturbed reefs. 
But tourism and cheap shrimp have both been cited before by 
conservationists as devastating to local ecologies and economies for less 
dramatic reasons: Both pollute local waters and distort small economies. 
Alternatives to both exist, such as farming the shrimp away from the coast, 
and vacationing in environmentally responsible resorts. But the best 
solution now may be for humans simply to reduce their consumption of shrimp 
? and understand that, even if you camp in the rainforest, there?s really 
no such thing as environmentally benign tourism.

--

www.marxmail.org