ABSTRACT
Increasing temperatures and a reduction in the frequency and severity of freezing events have been linked to species distribution shifts. Across the globe, mangrove ranges are expanding toward higher latitudes, likely due to diminishing frequency of freezing events associated with climate change. Continued warming will alter coastal wetland plant dynamics both above- and belowground, potentially altering plant capacity to keep up with sea level rise. We conducted an in situ warming experiment, in northeast Florida, to determine how increased temperature (+2°C) influences co-occurring mangrove and salt marsh plants. Warming was achieved using passive warming with three treatment levels (ambient, shade control, warmed). Avicennia germinans, the black mangrove, exhibited no differences in growth or height due to experimental warming, but displayed a warming-induced increase in leaf production (48%). Surprisingly, Distichlis spicata, the dominant salt marsh grass, increased in biomass (53% in 2013 and 70% in 2014), density (41%) and height (18%) with warming during summer months. Warming decreased plant root mass at depth and changed abundances of anaerobic bacterial taxa. Even while the poleward shift of mangroves is clearly controlled by the occurrences of severe freezes, chronic warming between these freeze events may slow the progression of mangrove dominance within ecotones.
Subject(s)
Avicennia/growth & development , Climate Change , Poaceae/growth & development , Wetlands , Florida , Plant Roots , Time FactorsABSTRACT
The authors describe a case of several hypotension in a healthy, 19 years old man, scheduled for surgical correction of a short Achiles tendon, following premedication with 1 ml of Inovar i.m. The patient was premedicated 20 minuts before being admitted to the O. R. the patient was drowsy, the blood pressure was 50 x 25 mm Hg and the heart rate 60 bpm. The hypotension did not respond either to atropine (1 mg) or to fluid therapy with lactated Ringer. After 2 mg of paredrinol i.v., the patient developed junctional rhythn for to minutes followed by recovery of the sinus rhythm and of blood pressure to 110 x 80 mm Hg
Subject(s)
Humans , Male , Adult , Anesthesia , Droperidol/administration & dosage , Droperidol/adverse effects , Fentanyl/administration & dosage , Fentanyl/adverse effects , Hypotension , Arterial PressureABSTRACT
A participacao do anestesiologista no conhecimento da problematica do paciente cirurgico tem sido nossa preocupacao constante. Desde julho de 1978, criou-se a reavaliacao conjunta dos pacientes cirurgicos, na semana anterior a data prevista da cirurgia, da qual participam anestesiologistas, cirurgioes e colegas consultores Os pacientes sao entrevistados pelos anestesiologistas, seus prontuarios sao revistos, faz-se um exame clinico dirigido e discutem-se os problemas pertinentes com os cirurgioes ou consultores e os pacientes recebem a orientacao final. De 866 pacientes que foram vistos, 49 pacientes foram medicados, para reavaliacao na internacao. 36 cirurgias foram suspensas pelos anestesiologistas, por apresentarem diversas patologias. Dois pacientes foram internados para tratamento clinico hospitalar. Esta experiencia trouxe diversas contribuicoes: uma melhor avaliacao dos pacientes, evitou-se a marcacao de cirurgia sem adequado preparo; racionalizando-se o uso do centro cirurgico, melhora-se a possibilidade da aceitacao das tecnicas regionais em pacientes pediatricos e melhora-se tambem o relacionamento cirurgiao -anestesiologista, contribuindo para a unidade de pensamento e de conduta dos proprios anestesiologistas
