TANINTHARYI, Myanmar — When viewed from the bow of a boat, the shoreline near the city of Myeik in southern Myanmar is all green. In every direction, low-slung mangroves blanket the horizon, their trunks submerged under several feet of water at high tide. The trees anchor a sprawling landscape that supports village life and a booming fishing industry up and down the shoreline of Tanintharyi, Myanmar’s southernmost state. But in many places, what appears green and lush from a distance disguises a landscape in peril.
Christoph Zockler, an ornithologist with the German foundation Manfred-Hermsen-Stiftung for Nature Conservation and Environmental Protection, has seen this up close. He first traveled through this labyrinth of coastal islands and mudflats in 2013 in search of shorebirds. In November of 2016, in collaboration with the U.K.-based NGO Fauna and Flora International (FFI), Zockler and a team of researchers from Myeik launched a 12-day expedition of coastal Tanintharyi by boat, sleeping on board and, when the tides allowed, camping on shore. The team cataloged otters, dolphins, vast swarms of crabs at low tide, a wide variety of fish and more than 200 species of birds, including the critically endangered spoon-billed sandpiper (Calidris pygmaea), of which no more than 600 likely remain on Earth.
But among the marine wildlife and endangered bird sightings, the team also observed human activity that is putting the future of the mangroves in jeopardy. At 16 of the 20 locations they visited, they witnessed logging with chainsaws: large old-growth trees chopped at the base; boats stacked high with logs destined for the furnaces of factories in Myeik, other cities in Myanmar, and even Thailand. In many cases, only saplings were left behind.
For a region that holds Myanmar’s last remaining old-growth mangrove forest, the rapidity and breadth of the destruction was shocking, Zockler said. “These mangroves are like nothing anywhere else in the country, in maturity, in stature, in ecological integrity,” he said. “But I don’t know for how long. The clock is ticking and the pressure is enormous.”
In an unpublished 2016 study, Anna Stephani, a graduate student at the University of Bayreuth in Germany, and several colleagues used satellite images to examine degrees of mangrove loss in the area around Myeik and further south. They characterized just 22 percent of the forest as “intact to slightly degraded,” a category that consisted of old-growth forest that was either untouched or logged lightly enough that it could still regenerate easily. A full 45 percent of the remaining forest she classified as “degraded,” and 18 percent as “heavily degraded.” Another study, conducted across the entirety of Tanintharyi by a team from FFI and the U.S.-based Smithsonian Conservation Biology Institute, found that 66 percent of the region’s mangroves were degraded and just 34 percent remained intact.
The level of deforestation has conservationists concerned that Tanintharyi’s mangroves could soon meet the same fate as those of the Irrawaddy Delta, a vast, populous area to the north where human activity has decimated once plentiful mangroves. Located near Myanmar’s largest city, Yangon, the delta has lost more than 80 percent of its mangroves over the past three decades. The destruction has been so widespread that international organizations are considering a plan to replant mangroves throughout the delta using drones. The forests that remain are severely degraded, said Zockler.
The effects of the loss on people have been tremendous, highlighted by Cyclone Nargis, which plowed through the low-lying delta in 2008 and killed 140,000 people. Had more of the mangrove forest been preserved, experts believe thousands of deaths could have been prevented..
On Zockler’s recent expedition and in surveys conducted by FFI and the Tanintharyi-based conservation group Green Network, locals reported that wood-cutting had accelerated in the past five years, due in large part to the import of cheap chainsaws from China. The wood is used to feed demand for charcoal in Myanmar and Thailand and to fuel fish-drying factories in Myeik.
In many of the villages that dot the Tanintharyi coast, mangroves remain a central part of life and are put to a much wider variety of uses. In Ma San Par, a fishing village tucked inside the treed waterways of an island near Myeik, 24-year-old Zaw Ko Oo putters his boat away from town each day before high tide to set crab traps deep in the submerged forest. He has been fishing this way since he was 4 years old, when he would accompany his grandmother into the mangroves with crab traps made of bamboo.
Nearly every family in town survives on marine life supported by the mangroves, either within the forest or farther out to sea. They mend boats with wood planks carved from mangrove trees. They build their homes above the shoreline, elevated on sawed-off mangrove trunks. They cook meals over fires that burn with charcoal made from mangroves. When storms come, the same trees serve as a bulwark, for which the people of the village are grateful. “The mangroves protect us from the outside wind and waves,” Oo said.
Village life continues in this way up and down the Tanintharyi coast. But it is not always by choice that communities turn to mangrove clearing, said Oo and others in his village. In places where fishing has become more difficult, people harvest mangroves to sell because they have few other options.
The region has just one formally protected area that contains mangroves: a national park on a remote island. The country as a whole has a similar problem: mangroves are underrepresented throughout Myanmar’s protected area system. Several mangrove forests in Tanintharyi are proposed for protection, but nothing has been finalized.
A mangrove reserve under pressure
Conservationists are hopeful that local communities can help fill the void. FFI, Green Network and others want to expand community forestry efforts. “We’d like to see larger areas go into the management of communities,” said Mark Grindley, FFI’s program manager in Tanintharyi, “but that also depends on their ability to keep out illegal timber collectors or charcoal makers. Because if they don’t get policing help, they’re just going to come into conflict with the other forest users.”FFI and Green Network have also begun a pilot program to help curb demand by introducing fuel-efficient wood stoves and subsidizing people who switch to gas burners, but the programs are still small at this point.
In the meantime, Myeik University marine science professor Nang Mya Han has undertaken a study of the carbon-storage capabilities of Tanintharyi’s mangroves, with the hopes of one day being able to sell carbon credits to other countries. In addition to working as storm buffers and combating erosion from rising sea levels, mangroves are also better at storing carbon dioxide than almost any other kind of tree, making them valuable in the fight against the rise of global temperatures. “Mangroves and climate change are intimately linked together,” Han said.
Just outside of the Myeik city limits, Han has her own pet project that she hopes will help with future conservation efforts on the Tanintharyi coast: a 324-hectare (800-acre) plot of mangroves, allocated to her supervision by former president Thein Sein. She envisions turning it into an academic reserve planted with a variety of mangrove species native to Myanmar that would allow students and researchers to study the country’s mangroves all in one place.
But even her reserve isn’t immune to the pressures facing Tanintharyi’s mangroves. Nearby brick factories have been covertly entering the forest and chopping down trees to fire their kilns, she said. Inside the reserve, the hacked-off trunks of harvested mangroves are visible.
From the outside, the mangroves look lush and green.
Citations
Connette, G., Oswald, P., Songer, M., Leimgruber, P. (2016). Mapping Distinct Forest Types Improves Overall Forest Identification Based on Multi-Spectral Landsat Imagery for Myanmar’s Tanintharyi Region. Remote Sensing 8:882.Giri C, Ochieng E, Tieszen LL, Zhu Z, Singh A, Loveland T, Masek J, Duke N (2011). Status and distribution of mangrove forests of the world using earth observation satellite data (version 1.3, updated by UNEP-WCMC). Global Ecology and Biogeography 20: 154-159. doi: 10.1111/j.1466-8238.2010.00584.x . Data URL: http://data.unep-wcmc.org/datasets/4
Hansen, M. C., P. V. Potapov, R. Moore, M. Hancher, S. A. Turubanova, A. Tyukavina, D. Thau, S. V. Stehman, S. J. Goetz, T. R. Loveland, A. Kommareddy, A. Egorov, L. Chini, C. O. Justice, and J. R. G. Townshend. 2013. “High-Resolution Global Maps of 21st-Century Forest Cover Change.” Science 342 (15 November): 850–53. Data available on-line from:http://earthenginepartners.appspot.com/science-2013-global-forest. Accessed through Global Forest Watch on December 20, 2017. www.globalforestwatch.org
Banner image: A boat load of cut mangroves. High-quality charcoal made from mangroves is exported to Thailand. Photo by Christoph Zockler.
Benjamin Graham is a journalist living in North Carolina. He writes about conservation, politics and birds.
FEEDBACK: Use this form to send a message to the editor of this post. If you want to post a public comment, you can do that at the bottom of the page.
Đăng nhận xét