The story appears on

Page C6

February 9, 2010

GET this page in PDF

Free for subscribers

View shopping cart

Related News

Home » Feature

True value of turtles

FORTY-NINE." On a Pacific beach in Costa Rica, a researcher whispers the number after counting the slimy, round white eggs just laid by a rare leatherback turtle in a hole dug in the sand under bright moonlight.

Turtles like this 1.5-meter female have probably been struggling out of the surf at night since before the dinosaurs disappeared 65 million years ago. The region is the main nesting site in the east Pacific for the critically endangered species.

Numbers of leatherbacks emerging onto this Costa Rican beach fell to 32 in the 2008-09 season from 1,500 two decades ago - due to factors such as nearby hotels, poaching of eggs, accidental snaring in fishermen's nets and global warming. Arrivals so far this season are slightly up.

Far from the beach, other experts may give a new argument for conserving the turtles by studying whether their fast-clotting blood can give clues to aiding humans, or if the way they regulate buoyancy can inform submarine design.

In 2010 - the International Year of Biodiversity - the United Nations wants efforts to slow the accelerating pace of extinctions to reach beyond nature lovers, to companies and economists.

Shifting emphasis from emotional images of polar bears, pandas or leatherbacks that stress the fragility and beauty of nature, the focus is on a harder-headed assessment of how the natural world is a key to economic growth and new products.

"Boosting biodiversity can boost the global economy," the UN Environment Program said while launching the theme. Natural services by coral reefs, forests or wetlands are too often undervalued, it said.

But profits from imitating nature have often been elusive. By some UN estimates, three species an hour are going extinct, most of them before they have even been identified.

"It's like we have a house full of wedding presents," says James Spotila, a professor of environmental science at Drexel University in Philadelphia. "And we're throwing them out of the window before we even open them."

UN reports say the world is facing the worst spate of extinctions since the dinosaurs vanished, due to factors such as expanding cities, forest clearance, overfishing, climate change and species disrupting new habitats.

Yet a hectare of intact coral reef, for instance, can be worth up to US$1 million a year for tourism, up to US$189,000 for protecting coasts from storms, up to US$57,000 as a source of genetic materials and up to US$3,818 for fisheries, according to a preliminary UN-backed study in late 2009.

The problem is translating such estimates into cash. "I always ask: 'Where's the business proposal?'," says Gunter Pauli, head of Zero Emissions Research and Initiatives which looks for opportunities in nature.

Many pharmaceutical firms rely on nature. Among recent examples, scientists developed the malaria drug artemisinin from sweet wormwood, while the Madagascan periwinkle and Pacific yew tree have both yielded treatments for cancer.

Beyond medicines, firms are looking to "biomimicry," tricks evolved by nature such as adhesives inspired by the feet of gecko lizards that can walk on ceilings, or cellphone screens imitating iridescent butterfly wings to generate colors.

Biomimicry products

Companies including Royal Dutch Shell, Dupont and Nike work with the Montana-based Biomimicry Guild, which seeks to identify new ideas.

"It's so fun to see the light go on in their eyes. They can see we can make money and do the right thing," says Sherry Ritter of the guild.

Still, Pauli says only three biomimicry products had secured annual turnover over 100 million euros (US$144.3 million).

These are Velcro - Swiss inventor George de Mestral was inspired in the 1940s by plant burrs trapped on his dog's fur - hypodermic needles which Terumo Corp modelled on the jab of a mosquito, and paints derived from a self-cleaning trick by the lotus plant, sold by US Sto Corp and other groups.

"A lot are nice, romantic ideas," Pauli says. "The abalone (shellfish) produces materials stronger than Kevlar: correct. Commercial viability: zero. It's too complicated."

Among new business ideas, he said coffee farms in Colombia had created 10,000 jobs by using coffee waste as fertiliser to grow edible tropical mushrooms. In turn, the remaining waste can be sold as animal feed.

The International Union for Conservation of Nature is seeking corporate sponsors to slow losses of species after the world failed to reach a UN goal of slowing the rate of extinctions of animals and plants by 2010.

"We failed miserably," says Jean-Christophe Vie, deputy head of IUCN's species programme. He said using economics to make the argument for protecting nature is often only stating the obvious.

Studies showing the utilitarian value of nature are an extra reason for conservation, said Ahmed Djoghlaf, executive secretary of the Convention on Biological Diversity.

It is only natural that these approaches, and the new data they generate, are receiving more attention since their estimates are suddenly becoming more robust, he says.

"Biodiversity decline is predominantly caused by economic activities in the broadest sense, and the debate all too often tends to pit 'economic' interests against 'environmental' interests. The recent work shows that this juxtaposition is fundamentally flawed," he says.

The leatherbacks, the biggest species of turtle, can dive deeper than other turtles, leading experts to wonder how they regulate buoyancy. That and the shape of their shells could give clues to submarine or ship design.

Spotila, the leatherback turtle expert, said turtle blood clots quickly to avoid giving sharks a scent that can bring an attack. Scientists are studying turtle blood for possible clues to stem bleeding in humans, for instance after surgery.

On Playa Grande, researchers such as Tera Dornfeld mark the site of the eggs after the female turtle has filled in the hole with her giant rear flippers and returned to the ocean. Later, the eggs will be dug up and transferred to a hatchery.

In a local economic battle, park managers fear developers may win permission from politicians to develop hotels, roads and villas closer to the remote beach.

"I fear that more development here would be the final nail in the coffin for the turtles," says Frank Paladino, professor of biology at Indiana Purdue University and director of research in Las Baulas park.

In one sign of hope, an aging poster on the wall of the research centre says the turtles could all be gone by 2010. A turtle and her 49 eggs have proven that wrong.


Copyright © 1999- Shanghai Daily. All rights reserved.Preferably viewed with Internet Explorer 8 or newer browsers.

沪公网安备 31010602000204号

Email this to your friend