Sediment measurements show that flow alterations and discharges are driving increasing concentrations of multiple heavy metals in the Nile Delta, threatening ecosystems, agriculture, and human health.
Suivie de l’accumulation des métaux lourds dans le Delta du Nil
Les analyses de sédiments montrent que la réutilisation de l’eau non traitée et la construction de barrages entraînent l’augmentation des concentrations de métaux lourds dans le Delta du Nil, menaçant gravement les écosystèmes, l’agriculture et la santé humaine.
Veterinary Antibiotics Reduce Soil Carbon Sequestration Capacity
Livestock grazing areas sequester less carbon than those under wild herbivores.
Roughed-Up Hillsides Reveal Tree-Toppling Winds
Researchers are reading pockmarks in the forest floor to study the uprooting of trees in southern Indiana and estimate how fast winds howled through the forest in the past.
How Much Greenhouse Gas Do Tropical Soils Emit?
New research found that tropical soils emit nitrogen mostly as inert dinitrogen rather than as greenhouse gases.
Satellite Data Reveal Uptick in Cover Cropping on Farms
Over the course of a decade, farmers growing corn and soybeans in the U.S. Midwest increased their adoption of cover cropping—a tenet of so-called conservation agriculture—by fourfold.
The World’s Roots Are Getting Shallower
Root-filled soils are hot spots of nutrient cycling and carbon storage. New research finds that the world has lost millions of cubic meters of rooted soil volume—and we’re on track to lose much more.
Widespread “Forever Chemicals” in Subsurface Environments
Massive use of materials containing per- and polyfluoroalkyl substances in commercial and industrial sectors has led to their widespread occurrence in subsurface environments.
Wetlands on the Farm: Potent, Nutrient-Capturing Tools in (Relatively) Small Packages
Constructed wetlands can significantly reduce water pollution from tile-drained farms.
It’s Cool to be Short When You’re in the Arctic Permafrost
Extensive ground temperature measurements complicate our understanding of how vegetation cover, snow duration, and microtopography influence the pace of permafrost thaw in a changing climate.