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maintaining ecosystem services, and that they need to be conserved even if their immediate values are not yet defined. Value offered by a single species is often unexpected and unanticipated, such as the potential value of a newly described species of catfish in the Amazon basin, whose unique gut bacteria can digest wood and may prove beneficial to manufacturing paper using less energy.
A more balanced approach to conservation is required taking into account the intrinsic value of wildlife and potential benefits that are currently overlooked by science. It is very difficult to assess the value of wild species because it not only depends on the properties of that species as they are currently understood but on the changes to the environment and society over time. When a species is lost or greatly reduced in an environment, there are consequences. For example, the Indian Vulture was unintentionally poisoned in the 1990s, reducing its numbers by more than 99%. This resulted in an increase in feral dogs which led to greater occurrences of rabies across India and Pakistan.
The authors suggest that the demonstrable links between individual species and ecosystem services that are critical to humanity should, at a minimum, eliminate the burden of proving the relevance of species and give way to an intelligent approach founded on the precautionary principle. Just because we generally don’t know what most species’ roles in nature are, does not mean that they are unimportant.
“There are so many reasons why we should care for the diversity of life and the wonders of our world," says Jean-Christophe Vié, Director of SOS-Save Our Species, Deputy Director IUCN Global Species Programme and member of the advisory board of the Mohamed bin Zayed Species Conservation Fund. “We can demonstrate the important role some wild species play but we are just scratching the surface: for millions of species we simply do not know. Thus, we should be cautious and not let wildlife vanish just because we are unable to demonstrate what they do for us. It is a huge mistake and many would be gone before we could demonstrate their 'usefulness'."
The paper is available online at http://www.cell.com/current-biology/abstract/S0960-9822(15)
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