Tag Archives: Ecology

MacArthur and Wilson’s Radical Theory wasn’t actually radical (even great ideas in ecology go unnoticed)

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Most ecologists know about the Theory of Island Biogeography; the theory that diversity patterns on islands are the consequence of dispersal from a mainland source. Robert MacArthur and E.O. Wilson presented this theory first as a research paper in 1963 and then as a monograph in 1967. The rest, as they say, is history.

The Theory of Island Biogeography is remarkable because it suggests that patterns of species co-existence are the consequence of chance, history and random dispersal. Before its publication, community ecologists generally assumed that species co-existence was due to deterministic niche-assembly, where the number and relative abundance of species were a result of ecological niches and the functional roles of each species.

The theory placed randomness at the forefront to community ecology. It also paved the way for Stephen Hubbell’s Unified Neutral Theory of Biodiversity and Biogeography; one of the most influential ecological theories in 21st century. In fact, the introductory chapter of Hubbell’s monograph (like this blog post) was titled “MacArthur and Wilson’s Radical Theory” in reverence to their path-breaking work.

Like the theory itself, MacArthur and Wilson have also reached cult-like status. Perhaps a most telling way of illustrating this fact is not by listing the prizes awarded to these two men (and there were many), but rather by listing the academic prizes named after them! The Ecological Society of America, for instance, awards the ‘Robert H. MacArthur Award‘ to eminent mid-career ecologists and the American Society of Naturalists grants the ‘Edward O. Wilson Naturalist Award‘ to mid-career researchers who make significant contributions to a particular ecosystem of group of organisms. Similarly, the International Biogeography Society has the ‘MacArthur & Wilson Award‘ for notable contributions to the field of biogeography.  Needless to say, MacArthur and Wilson are very influential and well-respected by contemporary ecologists (well, in most cases…).

The funny thing is that their paradigm shifting idea was actually proposed two decades earlier, by the less well-known lepidopterist Eugene Munroe. Continue reading →

Handling cumulative impacts during the environmental decision-making process

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Although ecology doesn’t have many general laws, one most likely to qualify is the species-area relationship. If you walk through a field in a straight line and count all the different species you come across, you’ll notice that the total number of species increases as you progress along your straight path. After a while, however, you’ll start seeing the same species over and over again until you eventually find that you’re no longer spotting any new ones. This is the asymptotic species-area curve. While the exact mathematical form of the relationship is still hotly debated, it is safe to assume that it is an increasing function that reaches a plateau once all the species have been encountered.

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A trail guide to Golden Gate Highlands National Park (South Africa)

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I’ve written about Golden Gate Highlands National Park in the past.

It’s a region that is very close to to my heart; I’ve spent hundreds of hours (and thousands of footsteps) on the sandstone slopes. Unfortunately, there are no complete guides to the hiking routes in the park – so I set out to make one of my own.

You can find route descriptions, hiking profiles, maps and photos of the main routes in the park by visiting this new page on my site. You can also download the route information as .kml shapefiles that can be imported into Google Earth or any other GIS platform.

View of Wodehouse

Crush the economy for the sake of conservation? Why not, we’ve done it before…

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Should we conserve nature at the expense of the economy? Specifically, should we risk the collapse of major industrial sectors to save species?

We’ve created modern buzzwords like “sustainable development” and “new conservation” to explain multiple-objective conservation programs because many argue that conservation is only sustainable when it aligns with other economic, social and political goals. I’ve even argued this point-of-view in the past. Society is petrified of putting an end to the exploitation of nature because we worry about the terrible consequences of dismantling the modern-day economy. Should we worry about the impending threat of unemployment, debt and unpaid mortgages if we were to choose conservation instead of consumption?

The short answer: No! Well, at least not if the past is any predictor of the future. Continue reading →

A how-to guide to getting your paper published in Nature or Science (UPDATED)

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NatureandScience

As an aspiring ecologist, I am well aware that publishing a paper in Nature or Science would give my career an incredible kick-start. But, like so many others, I didn’t know how to get my name printed on the glossy pages of the two oldest and most prestigious weekly scientific journals. So I did what any good scientist would do – no, this time I didn’t check Wikipedia – I knuckled down and poured over the pages in these celebrated periodicals. I spent countless nights without sleep, trying to crack the code.

Just as I was about to give up, I saw a glimmer of hope: a golden thread linking the fortunate submissions to these two behemoths of academic excellence. I managed to reverse-engineer the path to success and I will be so generous to share my astounding findings with you. But before I do that, a word of warning: my how-to guide only applies to ecological studies. Physicists, physiologists and… um… uh… anyone else (I ran out of alliterative scientific sub-fields) will have to find their own strategies. Continue reading →

Passion is not enough to reverse the biodiversity crisis

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If you’re reading this, then it’s safe to assume that you love nature. Your passion for all creatures great and small might even have pushed you to pursue a career in ecology or conservation biology. But is passion enough?

I don’t think so, and here’s why.

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