RESUMO
Impacts of global climate change on terrestrial ecosystems are imperfectly constrained by ecosystem models and direct observations. Pervasive ecosystem transformations occurred in response to warming and associated climatic changes during the last glacial-to-interglacial transition, which was comparable in magnitude to warming projected for the next century under high-emission scenarios. We reviewed 594 published paleoecological records to examine compositional and structural changes in terrestrial vegetation since the last glacial period and to project the magnitudes of ecosystem transformations under alternative future emission scenarios. Our results indicate that terrestrial ecosystems are highly sensitive to temperature change and suggest that, without major reductions in greenhouse gas emissions to the atmosphere, terrestrial ecosystems worldwide are at risk of major transformation, with accompanying disruption of ecosystem services and impacts on biodiversity.
Assuntos
Biodiversidade , Mudança ClimáticaRESUMO
A mathematical method based on a complex of capillary blood examinations was proposed and tested for detection of volume and degree of blood loss in trauma of the chest and the abdomen. This method may be used for optimization of intraoperative fluid management. It is very important when bleeding is not only into the serous cavities (blood loss is easy to evaluate during surgery) but also into the intermuscular and interstitial spaces, and also in internal hemorrhage.