The full debunk: More Carbon Dioxide in the atmosphere is not necessarily good for plants. skepticalscience/co2-plant-food.htm The negative impacts of global warming on agriculture, health, economy and environment far outweigh any positives. skepticalscience/global-warming-positives... A large number of ancient mass extinction events have been strongly linked to global climate change. Because current climate change is so rapid, the way species typically adapt (eg - migration) is, in most cases, simply not be possible. Global change is simply too pervasive and occurring too rapidly. skepticalscience/Can-animals-and-plants... The average direct climate change effect on crop yields is a 17 percent decline, but with significant differences by crop, region, and crop and climate models. The final average yield effect is an 11 percent decline as farmers respond by altering input use and management practices on existing agricultural area, expanding production into new areas (an increase in area globally of about 8 percent) and reduced consumption (a decline of about 3 percent). The average effect on crop prices is a 20 percent increase, but for some crops in some regions prices don’t change at all, while in others the increase is over 60 percent. ifpri.org/.../major-economic-models-climate... pubs.giss.nasa.gov/abs/ne07000m.html pnas.org/content/early/2013/12/12/1222465110 Our findings mean that nature is not as efficient in slowing global warming as we previously thought, said Kees Jan van Groenigen, research fellow at the Center for Ecosystem Science and Society at NAU and lead author of the study. By overlooking this effect of increased CO2 on soil microbes, models used by the Intergovernmental Panel on Climate Change may have overestimated the potential of soil to store carbon and mitigate the greenhouse effect. phys.org/news/2014-04-soil-carbon-loss-climate.html Further, forests have a limited capacity to soak up atmospheric carbon dioxide. Nature cannot self-correct entirely against climate change, and the scientific community has been both overestimating the impact of plants and underestimating the impact of soil microorganisms in how they absorb CO2 and ultimately impact global warming, said Bruce Hungate, director of the Center for Ecosystem Science and Society at NAU and lead author on the study. Models of land ecosystems need to be revised to represent microbial responses explicitly, Hungate said. Theyre the carbon balance trump card, reversing the effect of plants on total carbon storage. In addition, the study results indicate that widely accepted carbon cycle models overestimate the role of ecosystems in absorbing carbon from the atmosphere because the models do not represent the responses of soil microorganisms correctly. phys.org/.../2013-08-nature-ability-self-correct... High rates of climate and land-use changes threaten biodiversity and ecosystem function And Our results highlight areas expected to be most vulnerable to changes in biodiversity and ecosystem function due to the individual or combined effects of climate and land-use change. The integration of climate and land-use scenarios suggests different conservation prioritization strategies from climate velocities and species alone7. nature/.../ncurrent/full/nclimate2337.html
Posted on: Tue, 16 Dec 2014 14:55:29 +0000
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