Boasting about backyard biodiversity

The easiest way for an aspiring naturalist to explore wildlife is by stepping out into their own backyard. Try it yourself. As I write this, I can look through my window at a Karoo Thrush hopping about my garden. But this post is not about the tiny garden surrounding my current apartment, but rather about my childhood home. I was tremendously fortunate to grow up on a 60 hectare farm, where  first discovered my love for nature.

Between wrapping up my PhD and starting my current lecturing position, I spent a few months of unemployment back in the house I grew up in. During that time, I discovered the thrill of recording unobtrusive nocturnal critters using a camera trap. Every afternoon, I set up the camera trap and eagerly explored the footage the following morning. It was so much fun.

After enough time, even I was amazed by the variety of species that lived on this relatively small farm. Perhaps, I should rephrase that last sentence. You see, calling it a farm is not accurate because it hasn’t been used for agricultural in more than ten years. The last cows were removed back in 2004 and since then the land was left dormant and only managed to minimise the risk of wild fire.

Still, I captured footage of 18 different mammal species, which is remarkably high for such a small area. Moreover, the camera trap is unlikely to capture any footage of bats and small rodents, so the total mammal diversity is probably even higher. I decided to write up these observations and the results have just been published online in the African Journal of Ecology. Continue reading

Conservationists must realise that farmers are central to conserving nature

The patchwork of farmland near my childhood home

The patchwork of farmland near my childhood home

Between finishing my PhD and starting my current job, I spent several months of unemployment on the family farm near Bethlehem in the Free State Province, South Africa. Rather than actively searching for a real job, I procrastinated by watching birds and tracking mammals with a camera trap.

The experience was like re-reading a really good book; I kept seeing things I hadn’t noticed before. Despite spending my childhood in the area, it wasn’t until I actually started paying close attention that I realised the amazing nature around me.

Although it is an agricultural heartland, the region is teeming with life. For example, the sampling quadrat for the South African Bird Atlas Project near my house contains 257 different bird species. To put that in perspective, the entire Island of Madagascar supposedly only hosts 265 species (give or take 10 species depending on the source).

No wonder the area is part of the Rooiberge-Riemland Important Bird and Biodiversity Area.

If I, as a professional ecologist, took so long to realise the amazing biodiversity of the area, then surely others are also oblivious to it? As conservationists, we should be concerned by this.

Most of the half-a-million hectares of the Rooiberge-Riemland Important Bird and Biodiversity Area is on commercial farmland. How can we expect to conserve this area without the buy-in from the local farmers? They are, after all, the owners of the land and are solely responsible for what happens on the ground.

As a consequence, I am trying to realign my own career trajectory. The idea now is to make it as easy as possible for farmers to conserve nature. To this end, I wrote an essay for pilot African version of the The Conversation.

If you’re interested please click through: Farmers hold the key to nature conservation: let’s treat them that way.

We’re used to hearing great tales of conservation in faraway tropical forests and coral reefs, but I am incredibly excited about the opportunity to conserve nature in my own backyard. Hopefully, this is just the first in a long-line of things I have planned. Watch this space.

How do correlations between climate and biodiversity arise? UPDATED

Anyone who as ever watched a David Attenborough documentary knows that biodiversity differs in areas with different climates. Only a few species an survive in hot and dry deserts whereas warm and wet tropical forests are teeming with life. But have you every stopped to wonder why this is so?

Why are certain climate conditions able to support many species and others not? More specifically, how does this work mechanistically?

This was the question my co-authors and I set out to answer in our most recent paper just published online at Global Ecology and Biogeography.

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Long-term monitoring generally underestimates negative trends in biodiversity

Modern conservation and environmental management rely on data. Unless you can actually show cold, hard evidence of natural deterioration, you open yourself up to criticism from denialists and other eco-skeptics. It is too easy for industry lobbyists to dismiss conservation recommendations as tree-hugger scare-mongering.

So conservationists, being the idealists that we are, decide to gather evidence for downward trends of various aspects of biodiversity. Unfortunately, efforts to quantify biodiversity trends are a major challenge. Not because measuring trends in diversity is particularly difficult, but rather because long-term monitoring is susceptible to sampling artefacts.

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