Study: Lack of protection of the world’s deserts and deep sea regions

Worldwide assessment of protected areas

The scientists investigated the extent to which the world’s current network of protected areas, both on land and at sea, are truly representative in terms of biophysical features, such as temperature, precipitation, topography, sea surface temperature and salinity. In other words, which conditions are not sufficiently protected at present and where are they located.  

“The planning of protected areas has tended to focus on biodiversity and representative ecosystems,” says Matthias Biber, a doctoral candidate in the MintBio team. Under his leadership, a research team has now studied the combination of biophysical factors on a global scale. This method has so far often been overlooked when planning protected areas and so far no global assessment has considered  terrestrial and marine habitats together.

The study shows that protected areas are relatively rare in regions with high temperatures and low precipitation, while the protection of various elevations is evenly distributed. “Our study thus reveals low protection for conditions like those in the Sahara and the Arabian Peninsula,” says Matthias Biber.

In the marine realm, by contrast, areas with medium and high sea surface salinity and the deep sea were found to be underrepresented, while protection for different surface temperature conditions was evenly distributed. “Especially in the deep sea, we still know much too little about biodiversity. Because our study shows a lack of protection of this habitat, that means that a largely unexplored area could be lost through damage from human activity or exploitation,” says Biber.

“The planning and structure of networks of protected areas is vitally important to the preservation of biodiversity. Because we do not even know in some cases which species remain undiscovered in areas such as the deep sea or the desert and how these and other species will respond to climate change, it is important not to limit protection to a few areas with high biodiversity. Instead we should create a network of protected areas with maximum resilience that will offer refuge for all possible environmental conditions and thus all potential habitats in the future,” explains Hof.

Consequently, the study can provide useful insights for researchers, practitioners and political actors in order to create a more comprehensive global protected area network.