Invaded

Pollution doesn't make for easy sonnets or flowing, romantic narratives. And that's what this title is about - pollution. Not the everyday sort of pollution that we recognise so easily, the type which piles up into stinking heaps of litter or that clogs the sky with filthy smoke. No, this is a form of pollution which is so subtle and insidious that many people do not realise it is there. Invaded is about biological pollution, the kind that comes in dense hedges of lush greenery, blooming fields of heady petals or gracefully draped creepers. It may spread incognito on the wings of a bird, tug on the end of an angler's line or scurry unnoticed through the undergrowth. These pages explore plants and animals that have traversed the borders and boundaries of their natural habitats and made their way into South Africa over the past 300 years and more. Unhindered by the predators and diseases which once kept their populations in check, many have come to outnumber and out-compete the species they encounter in their adopted homes. Invaded provides an overview of the different species that have arrived in our country during the past three centuries, and the threats they pose (or have the potential to become). Ultimately, the book attempts to quantify how these species have changed systems, disrupted the natural environment and threatened the future of the country's many unique plants, animals and habitats.