Additional file 13.

I think that this photo shows one of the most important issue in nature conservation nowadays. And it is known because of habitat loss that a lot of species are facing big troubles to survive. So, people are trying to create reserves and refugees for animals. But the encroachment due to sprawling of cities highlights the problem of saving either one or another species, because in a restricted area often it is not possible to conserve all the species occurring inside. My photo is a way to underline this compromise.” Attribution: Matteo Lattuada (University of Antwerp).

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Harold et al. BMC Ecology 2013 13:6   doi:10.1186/1472-6785-13-6