A major UN meeting designed to safeguard the world's natural resources began Monday with appeals to ensure that biodiversity does not become a victim of the global financial crisis.

More than 170 countries are meeting in the Indian city of Hyderabad over the next 12 days under the United Nations' Convention on Biological Diversity (CBD), an offshoot of the 1992 Earth Summit in Rio de Janeiro.

UN environmental experts have warned that the world has as little as a decade to fend off a species extinction that also poses a threat to humanity.

And more than two decades after the Rio summit, the CBD's executive secretary Braulio Ferreira De Souza Dias said that it was still a struggle to persuade governments to put biodiversity at the centre of development agendas.

"Biodiversity should not be perceived only as a problem, but rather, for what it really is: a crucial asset which underpins sustainable development and is closely linked to many social and economic issues," he told delegates.

"Yes, we are facing times of financial crisis, but times of crisis are the best opportunities to make substantive changes in the way we do business.

"Expenditures on biodiversity should not be seen as costs -- they should be seen as investments that will pay back with significant environmental, social and economic benefits for all our societies."

Nearly half of amphibian species, a third of corals, a quarter of mammals, a fifth of all plants and 13 percent of the world's birds are at risk of extinction, according to the "Red List" compiled by the International Union for the Conservation of Nature (IUCN).

The last CBD conference in Nagoya, Japan, adopted a 20-point plan in 2010 to turn back biodiversity loss by 2020.

But it has been a battle since then to find the hundreds of billions of dollars needed to fund such a commitment at a time when the developed world finds itself in economic difficulties.

Jayanthi Natarajan, India's environment minister, said failure to fund the protection of biodiversity would mean a higher price to pay in the long term.

"Expenditure on biodiversity needs to be looked at actually as an investment that will reap benefits for us and our future generations," the minister said.

"The present global economic crisis should not deter us, but on the contrary encourage us to invest more towards amelioration of the natural capital for ensuring uninterrupted ecosystem services, on which all life on Earth depends."

Jane Smart, a director of the International Union for Conservation of Nature, said countries should stop seeing environmental protection as a financial burden.

"Investing in natural infrastructure is a cost-effective way to respond to long-term human needs ... as well as a stable economy and generation of employment," said Smart.

"In the time of a global economic crisis, it's an investment that will go a long way."

Countries pledged under the Millennium Development Goals to achieve a "significant reduction" in the rate of plant and animal loss by 2010, but the UN admits the goal has been missed by some distance.

Amina Mohamed, deputy head of the UN's Environment Programme, acknowledged that the costs of implementing protection programmes may seem high "to some, in parts of the world still undergoing an on- going economic and financial crisis".

"But our collective experience and new analysis ... have illuminated that the costs of inaction are far higher and will rise and that the losses the world-especially the poor-are sustaining annually as a result of unsustainable management of the natural world dwarf the investments," said Mohamed.