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Trees and climate (the lesson)

25 – 50% of a living tree is water, depending on the species and the season. Until recentlythe water in the trees was seen as insignificant but resent work of thje university of Fairbanks (Alaska, USA) has shown that this… read more “Trees and climate (the lesson)”

Protect the last of the wild

Global conservation policy must stop the disappearance of Earth’s few intact ecosystems, warn James E. M. Watson, James R. Allan and colleagues in Nature  31 oktober 2018 A century ago, only 15% of Earth’s surface was used to grow crops… read more “Protect the last of the wild”

How an Invasive Bee Managed to Thrive in Australia

The Asian honeybee should have been crippled by low genetic diversity, but thanks to natural selection it thrived. uIn the famous case of Darwin’s finches, natural selection acts decisively, elevating a trait in the population, weeding it out, or simply… read more “How an Invasive Bee Managed to Thrive in Australia”

Environmentally friendly farming practices used by..

PULLMAN, Wash. – Nearly one-third of the world’s farms have adopted more environmentally friendly practices while continuing to be productive, according to a global assessment by 17 scientists in five countries. The researchers analyzed farms that use some form of… read more “Environmentally friendly farming practices used by nearly 1/3 of world’s farms”

Bound by nature – Cul­tural evol­u­tion h..

Cli­mate driven net primary pro­ductiv­ity, biod­iversity, and patho­gens con­strain the global hunter-gatherer pop­u­la­tion dens­ity However, the most influential drivers of population density are context-dependent. Biodiversity affects population density mostly in the low-productivity environments, whereas pathogen stress, which has insignificant effects… read more “Bound by nature – Cul­tural evol­u­tion has not freed hunter-gather­ers from en­vir­on­men­tal for­cing”