- While the Arctic is melting the Gulf Stream remains
- Human genome was shaped by an evolutionary arms race with itself
- Bacterial genome important to fuel and chemical production sequenced
- If trees could talk: Forest research network reveals global change effects
- Cow behaviour changes in response to deterioration in health
- The dangers of teens using weed
- Protein controlling gut's protective force field identified: Immune-system receptor encourages growth of bacterial shield during illness
- Goats better than chemicals for curbing invasive marsh grass
- Gauntlet of obstacles facing migrating pronghorn in greater Yellowstone
Posted: 28 Sep 2014 01:13 PM PDT
Posted: 28 Sep 2014 12:47 PM PDT
An evolutionary arms race between rival elements within the genomes of primates drove the evolution of complex regulatory networks that orchestrate the activity of genes in every cell of our bodies, researach shows. The arms race is between mobile DNA sequences known as 'retrotransposons' (a.k.a. 'jumping genes') and the genes that have evolved to control them.
Posted: 26 Sep 2014 06:35 PM PDT
Posted: 26 Sep 2014 06:13 AM PDT
Permafrost thaw drives forest loss in Canada, while drought has killed trees in Panama, southern India and Borneo. In the U.S., in Virginia, over-abundant deer eat trees before they reach maturity, while nitrogen pollution has changed soil chemistry in Canada and Panama. More than 100 collaborators have now published a major overview of what 59 forests in 24 countries teach us about forest responses to global change.
Posted: 26 Sep 2014 05:58 AM PDT
Posted: 25 Sep 2014 12:06 PM PDT
Posted: 25 Sep 2014 11:11 AM PDT
A sugary force field is activated in the gut when our defenses are down to encourage the growth of helpful bacteria and fight over-colonization by harmful micro-organisms, scientists have discovered. Scientists have found that mice who have had the gene IL-22RA1 gene removed are more susceptible to infection because they cannot produce a receptor protein that makes the cells produce sugars. Normally this process coats the surface of the intestine with a sugary substance that encourages the growth of bacteria and the restoration of balance. With the gene removed, the body was unable to produce this force field.
Posted: 25 Sep 2014 10:27 AM PDT
Herbivores, not herbicides, may be the most effective way to combat the spread of Phragmites australis, one of the most invasive plants now threatening East Coast salt marshes. A new study finds allowing small herds of goats and other livestock to graze in severely affected marshes can reduce phragmites cover from 94 percent to 21 percent and help restore natural species diversity, marsh function, and valuable shoreline views of the water.
Posted: 25 Sep 2014 10:26 AM PDT
One of North America's last remaining long-distance land migrations, better known as the Path of the Pronghorn, is being threatened by a mosaic of natural gas field development, highway traffic, and fencing in the upper Green River Basin, according to scientists who used a model traditionally applied to identify resource related stopovers for migrating animals in order to identify impediments to migration of pronghorn.
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