“Grassification” of desert shrublands

DESERTIFICATION

Energy flow and the “grassification” of desert shrublands

by Julio L. Betancourt

in http://www.pnas.org/content/112/31/9504.short?rss=1

Extract

In our directionally and continuously changing world, history still matters, and it does so in increasingly novel and important ways. Human adaptation to global change will rely heavily on robust baselines of historic environmental variability and detailed understanding of how both past and modern ecosystems have responded to both individual and multiple stressors. The question of global change has motivated an upsurge in paleoecological studies that span the late Quaternary and the modern era, and has inspired a growing consideration of time as a fundamental axis in ecology (1). A major challenge in developing pertinent ecological baselines remains how to fuse, into continuous time series, observations and experiments from living systems with paleoecological reconstructions from the same sites (2, 3). Tracing and disentangling complex responses to environmental stress from paleological…

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About Dr. B. A. USMAN

I started as a field Veterinary officer with the Borno State Ministry of Agriculture and later joined College of Agric, maiduguri as a lecture & a researcher in the Department of Animal Health & Production. I was appointed the Provost of the College In 2003. 2007 I was appointed Hon. Commissioner & Member Borno State Executive Council and later appointed Permanent Secretary with the Borno State Civil Service in 2009. I was the National Facilitator Animal Health, National Programme For Food Security of the Federal Ministry of Agric & Rural Development, Abuja. I'm currently the Director, Veterinary Medicine & Allied Products (VMAP) NAFDAC, Nigeria. I engaged myself in various aspects of the veterinary profession. I'm a practicing Veterinarian & Strong Advocate of #SDGs most especially #SDGs 1, 2, 4 & 5 I founded Sril Group Ltd.
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