Species richness is not homogeneous in space and it normally presents differences when comparing among different sites. These differences often respond to gradients in one or several factors which create biodiversity patterns in space and are scale-dependent.
The life and work of the Prussian geographer and naturalist Alexander von Humboldt continues to fascinate, even today. This is partly because his figure concentrates and synthesises the movements, ideas, and even the great contradictions of the time of profound change that was nineteenth-century Europe
In September of 2011 the 6th Science Centre World Congress was held in Cape Town, South Africa. Some of the participants, among which I was, had the privilege to make a four day visit to Welgevonden Park (meaning found well in Afrikaans).
Nature’s complexity goes beyond human imagination. The discovery and exploitation of biodiversity has undoubtedly helped us to reach a certain level of understanding of the natural world. Even though all essential ecological processes of the biosphere are determined and regulated by microorganism activity, for most