Ecologocal destruction: the Rot & the Remedy..

on Thursday, August 5, 2010

Book Review

Ecological Meltdown - Impact of unchecked human growth on the earth’s natural systems

Asheem Srivastav and Suvira Srivastav

In a recent article in Proceedings of National Academy of Sciences, Paul R.Ehrlich and robert M.Pringle observe that, in the absence of a rapid, tranformative intervention, the earth's biodiversity will gop "up in smoke" (PNAS, August 12, 2008).

There are several disturbing pointers to the impending crisis: trees that are vital for averting desertification and arresting the increase in greenhouse gas emmissions are felled at a perturbing rate- one estimate has it that, at the, at the current rate of destruction, rainforests across the world will be wiped out in 40 years; the oceanic zooplankton- a critical element in the food chain as well as the oxygen cycle- has declined at an alarming 73% since 1960; and the increase in greenhouse gas emmissions, especially carbon dioxide, has the potential not only to cause global climate change, but also to threaten living organisms in different oceans by raising the acidity level.

CAUSES

That there is, unmistakably, the human hand or influence behind all these factors is reflected in several recent publications, including the Millenium ecosystem Assessment. Through their analysis of the causes and implications of ecological meltdown, the authors of this book seek to convey the same message.

The first of the eight chapters in the book sets the tone by speaking about species extinction and the need for conservation. The second dwells on how population growth contributes to ecological destruction, while the third chapter highlights the multiple threats to ecosystems. The precarious condition in which the protected areas and their inhabitants find themselves as a consequence of human greed is depicted in the next two chapters. the rest of the book focusses on the remedies for the ecological destruction set in motion by the anthropogenic activities.

Asheem Srivastav and Suvira Srivastav argue that the ongoing conservation effoprts at the national and global levels through multilateral agreements and with international funding are useful only as a sort of 'first aid' and are not good enough to treat the "deep wounds" that are inflicted on the ecosystem. They contend that the notion of sustainable development needs to be revisited urgently if an ecological meltdown is to be averted.

Apart from population growth, unbridled consumption demand is held out as another vital cause for ecological destruction. But the authors fail to acknowledge the important role played by the divergence in consumption patterns of the haves and the have-nots.

For instance, the regional estimates of the ecological footprint prepared by the Global Footprint network reveal that the combined ecological influence of north America and the European Union( with a total population of about 780million) is more than that of Asia (comprising about 3,500 million people). The book is good in identifying the causes and implications of the ecological meltdown, but it puts forth hardly any new idea for tackling the problem. For instance, the authors discuss at length how consumption of wood fuel leads to degradation of forests, but fail to explore why a vast majority of the rural population is compelled to depend on wood for their fuel needs. Nor are the health implications of this continued dependence discussed.

SOLUTIONS

Use of improved stoves coupled with curbs by local governments on drawing fuel wood from a live tree will cut down not only the health-related social burden but also the household sector's contribution to greenhouse gas emissions. Similarly, in the developing countries, off-grid solutions involving renewable resourses have the potential to meet the energy needs of the poor, without pushing the Earth to the brink of disaster. The authors could well have focussed more on solutions to the problem.

In fact, a number of solutions have been in discussion for quite a few years now, and many of them are prima facie doable. Ehrlich and Pringle, in their article cited at the beginning, suggest some feasible pathways to avert an ecological disaster. Unfortunately, the academic community, which is all-too-familiar with the 'solutions', does not see their 'implementation' as part of its job description. Preventing an ecological meltdown lies not so much in the hands of cutting-edge science as in the ability of the academia to educate society at large. The Srivastavs, through their simple narrative, have sought to serve this objective.

Courtesy: The Hindu. This news item appeared in The Hindu as a book review on Tuesday, August 3, 2010

Posted by- Ananya Bose, First year, NLIU.

Biggest census of Marine life

It has been the biggest and most comprehensive attempt ever to answer that age-old question: how many fish are there in the sea?

Published on 2 August, a 10-year study of the diversity, distribution and abundance of life in the world's oceans, the Census of Marine Life (COML), estimates there are more than 230,000 species in our oceans.

COMPREHENSIVE

The survey covers “from coast to the open ocean, from the shallows to the deep, from little things like microbes to large things such as fish and whales,” said Patricia Miloslavich of Universidad Simon Bolivar, Venezuela, the co-senior scientist of the COML.

More than 360 scientists have spent the past decade surveying 25 regions.

The results show that around a fifth of the world's marine species are crustaceans such as crabs, lobsters, krill and barnacles. Add molluscs (squid and octopus) and fish (including sharks) and that accounts for up to half the species in the seas.

The charismatic species often used in conservation campaigning — whales, sea lions, turtles and sea birds — account for less than 2 per cent.

The surveys have also highlighted areas of concern for conservationists.

“In every region they've got the same story of a major collapse of what were usually very abundant fish stocks or crabs or crustaceans that are now only 5 per cent-10 per cent of what they used to be,” said Mark Costello of the Leigh Marine Laboratory, University of Auckland.

“These are largely due to over-harvesting and poor management of those fisheries. That's probably the biggest and most consistent threat to marine biodiversity around the world.” The main threats include overfishing, degraded habitats, pollution and the arrival of invasive species.

But more problems loom: rising water temperatures and acidification thanks to climate change and the growth in areas of the ocean that are low in oxygen and, therefore, unable to support life.

MOST DIVERSE REGIONS

The most diverse regions identified by the COML are around Australia and south-east Asia. “It's also a hotspot for terrestrial biodiversity and this has been known for about 100 years,” said Costello.

“It looks like that region with the coral reefs has always had a very high rate of speciation. It also has a very diverse range of habitats — from the deepest areas of the oceans to large areas of shallow seas, which can support coral reefs.”

Australian and Japanese waters contain more than 30,000 species each. Next in line are the oceans off China, the Mediterranean Sea and the Gulf of Mexico. — © Guardian Newspapers Limited, 2010

Courtesy: Guardian Newspapers Limited; This story was published in The Hindu on August 5, 2010

Posted by: Shivendu Joshi