CONICET | Buscador de Institutos y Recursos Humanos

As the earth becomes a quilt of managed patches, ecohydrologists need to move from describing to predicting the consequences of human activities, using knowledge to improve human well-being. We highlight three current opportunities in ecohydrology. The ﬁrst is the need for stronger research in arid and semi-arid ecosystems, where water is scarce and a tight coupling exists between hydrology and ecology. The second is to build better predictive frameworks for understanding the consequences of vegetation change. The new framework we propose here combines landscape connectivity, through recharge and discharge dynamics, with global climate. In systems where annual precipitation and evapotranspiration are similar, the evapotranspirative differences of altered vegetation can quickly tip the water balance between positive and negative, fundamentally altering water ﬂows and biogeochemistry. The third opportunity is to use simpliﬁed agricultural systems to build and test ecohydrological theory. Such systems function under the same biophysical rules but are often better controlled and replicated than more natural ecosystems. Resolving todays controversies requires sound ecohydrological science in a world where the inﬂuences of people are increasingly universal.