RESUMEN
Boreal and subarctic peatlands are an important dynamical component of the earth system. They are sensitive to climate change, and could either continue to serve as a carbon sink or become a carbon source. Climatic thresholds for switching peatlands from sink to source are not well defined, and therefore, incorporating peatlands into Earth system models is a challenging task. Here we introduce a climatic index, warm precipitation excess, to delineate the potential geographic distribution of boreal peatlands for a given climate and landscape morphology. This allows us to explain the present-day distribution of peatlands in Western Siberia, their absence during the Last Glacial Maximum, their expansion during the mid-Holocene, and to form a working hypothesis about the trend to peatland degradation in the southern taiga belt of Western Siberia under an RCP 8.5 scenario for the projected climate in year 2100.
Asunto(s)
Obstrucción Intestinal/etiología , Intestino Delgado/irrigación sanguínea , Isquemia/complicaciones , Complicaciones Posoperatorias/etiología , Enfermedad Aguda , Constricción Patológica/complicaciones , Constricción Patológica/cirugía , Humanos , Obstrucción Intestinal/cirugía , Intestino Delgado/cirugía , Isquemia/cirugía , Masculino , Persona de Mediana Edad , Complicaciones Posoperatorias/cirugía , Adherencias TisularesRESUMEN
Luminescent laparoscopy was performed in 51 cases for the assessment of the intestinal blood circulation. Sixteen examinations were performed in acute cholecystitis. Pseudo-negative result has been obtained in 4.5% of the 67 observations. The traditional technique of laparoscopy used with the same purpose in 113 examinations gave errors in 48.7%.