Water scarcity is driving California farmers to plant different crops. Growers are switching to more profitable, less-thirsty fruits, vegetables and nuts.
California Farmers Switch to Less Thirsty Crops
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Estudio de semillas revela los riesgos futuros a la naturaleza
El primer estudio en todo el mundo de los animales y las semillas que comen ha anulado una suposición sostenida por largo tiempo: que los animales grandes se alimentan principalmente de semillas grandes.
El hallazgo de los científicos de la University of New South Wales, Australia (UNSW), tiene implicaciones para la conservación que muestran que una mayor variedad de plantas podrían estar en riesgo si los grandes animales se extinguen y no dispersan sus semillas.
New MIT study on the historical climate of the American West
All around the deserts of Utah, Nevada, southern Oregon, and eastern California, ancient shorelines line the hillsides above dry valley floors, like bathtub rings — remnants of the lakes once found throughout the region. Even as the ice sheets retreated at the end of the last ice age, 12,000 years ago, the region remained much wetter than it is today. The earliest settlers of the region are likely to have encountered a verdant landscape of springs and wetlands.
So just when and why did today’s desert West dry out?
The light-sensing molecules in plants came from ancient algae
The light-sensing molecules that tell plants whether to germinate, when to flower and which direction to grow were inherited millions of years ago from ancient algae, finds a new study from Duke University.
The findings are some of the strongest evidence yet refuting the prevailing idea that the ancestors of early plants got the red light sensors that helped them move from water to land by engulfing light-sensing bacteria, the researchers say.
La NASA encuentra que los glaciares de Groenlandia se derriten más rápido de lo pensado
Los glaciares de Groenlandia que desembocan en el océano se extienden bajo el nivel del mar más allá de lo que se había medido con anterioridad, lo que le permite al agua del océano el socavar gravemente los glaciares en la superficie. Ese proceso elevará los niveles del mar en todo el mundo mucho más rápido de lo estimado en la actualidad, según un equipo de investigadores dirigido por Eric Rignot, de la Universidad de California en Irvine (UCI), y el Laboratorio de Propulsión a Chorro de la NASA en Pasadena, California.
Arctic ice growth doesn't disprove climate change
New data shows that in 2013 Arctic ice actually grew rather than retreating as climate change models had predicted. Far from proving climate change is a myth or that ice retreat has ended, as skeptics are now claiming, this reveals something much more interesting about our warming climate.
