Peter B. Reich

The 2009 BBVA Foundation Frontiers of Knowledge Award in the Ecology and Conservation Biology category goes to plant ecologist Peter B. Reich (New York, 1953) for work that “radically improves our understanding of and ability to predict terrestrial ecosystem compositional and functional responses to global environmental change”, including climate change and biodiversity loss.

The jury highlighted the importance of the fieldwork conducted by the University of Minnesota professor over the space of various decades, with pioneering experiments that integrate information from hundreds of species all over the world.
 
These experiments have come up with two of the new laureate’s most salient findings: the discovery of the links forged between leaf design features and the behavior of an entire ecosystem, be it Mediterranean woodland or tropical rainforest; and, secondly, the way that biodiversity losses impact on remaining species. Reich, the jury affirms, has provided “the first evidence that species diversity affects plant productivity and ecosystem stability”.

These results are a wake-up call on the “adverse consequences” of biodiversity loss. They also suggest that the ability of ecosystems to sequester atmospheric carbon dioxide may have been considerably overestimated. “If this is true” the citation goes on, “atmospheric CO2 concentrations may rise faster than anticipated, and global climate change may occur faster than predicted”.

From leaf to biosphere

The connecting thread in Reich’s work is his ability to link ecosystem events at the smallest scales with global processes, as he strives to elucidate the relationship between different levels of complexity: from the seedling to the tree, from the cell to the ecosystem and from the stand to the biosphere. In this way, the ecosystem is conceptually assimilated to a single living organism.

It all starts with the leaf. “Leaves only have a few functions they have to provide for plants, and because of that they have a predictable set of characteristics, which allow us to predict a lot about how an entire grassland or forest or crop system will behave physiologically”, explained Reich shortly after hearing of the award. The traits of a leaf and the behavior of an ecosystem are shaped by biophysical and evolutionary factors, so it is possible to “extrapolate or scale or predict from the leaf to the whole canopy”.

For the simple leaf is in fact a complex organ, from which Reich has extracted a series of key characteristics yielding significant predictive power: “so we can understand the evolution of the Mediterranean forest, the rainforest, the Arctic tundra, and how they will respond to climate change or rising concentrations of atmospheric CO2”.

Reich is leader of a unique ongoing experiment (named BioCON) conducted in open grassland, rather than closed chambers, exploring ways in which plant communities will respond to three environmental changes already occurring on a global scale: increasing nitrogen deposition, increasing atmospheric CO2, and decreasing biodiversity. The team hope their results will give a more accurate picture of how much CO2 plants can absorb; a vital input to the international carbon trading agreements now being put in place.

“Thanks to these experiments, we are better able to predict not only what kind of forest and grasslands we will have, but also whether we will have them in a given area and how they will respond in terms of their productivity, nutrient cycle and their health as we change things like temperature and CO2”.

Prof. Reich is author of over 300 peer-reviewed publications, cited on more than 12,000 occasions, and since 2003, has figured among the ten most frequently cited Ecological and Environmental Scientists in the world. He began his scientific career with a B.A. in physics and creative writing at Goddard College (Vermont, United States), which he followed with a master’s degree in forest ecology at the University of Missouri. He later obtained his Ph.D. in environmental biology and plant ecology from Cornell University, and currently holds the Distinguished McKnight University Professorship at the University of Minnesota, where he is also Regents Professor.

International jury

The jury was chaired by Daniel Pauly, Professor of Fisheries at the University of British Columbia Fisheries Centre (Canada), with Gary Meffe, scientist in the Department of Wildlife Ecology and Conservation of the University of Florida (United States) acting as secretary. Remaining members were Wilhem Boland, Managing Director of the Max Planck Institute for Chemical Ecology (Germany), Joanna Burger, Distinguished Professor of Biology at Rutgers University (United States), and Pedro Jordano, a Research Professor in the Department of Integrative Ecology at Doñana Biological Station, CSIC (Spain).