Sand dunes reveal biodiversity secrets in Australia

Ancient, acidic and nutrient-depleted dunes in Western Australia are not an obvious place to answer a question that has vexed tropical biologists for decades. But the Jurien Bay dunes proved to be the perfect site to unravel why plant diversity varies from place to place. Scientists show that environmental filtering -- but not a host of other theories -- determines local plant diversity in one of Earth's biodiversity hotspots.

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