This is an adaptation of my abstract for the keynote talk I have been asked to prepare for Monday February 15, at the 2016 ASEAN Conference on Biodiversity, to be held in Bangkok.
Those with high biophilia (love of the bio or living nature) seek arguments that biodiversity is good for health and well-being. It is, but it’s not straightforward.
Biodiversity, defined as variability among living organisms (terrestrial, marine, other aquatic) and the ecological complexes of which they are part is somewhat analogous to software in a very powerful computer. Bio-diversity includes variation within species, between species and between ecosystems. Biodiversity has tremendous redundancy (overlap) and evolutionary capacity. Over time, it can regenerate, self-organise, and heal. However, biodiversity is not indestructible. It can be harmed. Thresholds exist beyond which some computer programmes will completely fail. Ecosystem services can be reduced by critical gaps in biodiversity.
Homo sapiens, has, until now, prospered greatly on its home planet. In large part this is because human ingenuity has enabled the capturing, harnessing, and in some areas the exhaustion or substantial reduction of stocks of natural capital. While this applies most obviously to inert material such as fossil fuel and phosphate (respectively fuelling our economy and fertilising out farms), we have also eliminated most megafauna, from giant lemurs in Madagascar to flightless ducks in Hawaii. Our ancestors used resources from the now extinct woolly mammoth to colonise the Arctic. Destruction of the moa allowed rapid colonisation of Aotearoa (New Zealand). In some cases (such as of lions in ancient Greece) extinction of megafauna probably made living easier and safer for humans. In others, such as in Aotearoa, it led to a crisis of protein scarcity, helping to drive cannibalism.
In some places, perhaps many, loss of biodiversity may have triggered ethoi of conservation, where taboos, totemic species and other institutions helped preserve a minimum suite of species and reduce Tragedies of the Commons.
However, competition between different varieties of human has led, in many cases, to the overthrow of regional conservation practices, such as the North American buffalo slaughter.
A new global ethos has become almost completely dominant, even though fiercely resisted by those with high biophilia. This is the conceit that human ingenuity and technology are so powerful that biodiversity loss is mainly an aesthetic issue.
This conceit (leading to unconscious form of ecological brinkmanship) is dominant because those who hold the greatest political and economic power are not receiving any warning signal, other than an occasional protest.
As for health, there are some examples (e.g. Lyme disease, malaria, Ebola) where changes in biodiversity and ecosystem function have modified infectious disease risk, but relationships are bi-directional and disease and context specific. More straightforward, utilitarian arguments exist seeking to preserve species as reservoirs of as yet undiscovered compounds with pharmaceutical and other human benefits. Others advance ethical reasons, especially to conserve charismatic animal and plant species.
Unfortunately, none of these arguments, even combined, are sufficient to slow the juggernaut of biodiversity-eroding economic “growth”. Those with high biophilia have to think even more broadly, co-operating even more intensively with others who strive for global social and ecological justice, a strengthened eco-noösphere and a reduced human footprint on Earth.