Allocation trade-offs dominate the response of tropical forest growth to seasonal and interannual drought.

What determines the seasonal and interannual variation of growth rates in trees in a tropical forest? We explore this question with a novel four-year high-temporal-resolution data set of carbon allocation from two forest plots in the Bolivian Amazon. The forests show strong seasonal variation in tree wood growth rates, which are largely explained by shifts in carbon allocation, and not by shifts in total productivity. At the deeper soil plot, there was a clear seasonal trade-off between wood and canopy NPP, while the shallower soils plot showed a contrasting seasonal trade-off between wood and fine roots. Although a strong 2010 drought reduced photosynthesis, NPP remained constant and increased in the six-month period following the drought, which indicates usage of significant nonstructural carbohydrate stores. Following the drought, carbon allocation increased initially towards the canopy, and then in the following year, allocation increased towards fine-root production. Had we only measured woody growth at these sites and inferred total NPP, we would have misinterpreted both the seasonal and interannual responses. In many tropical forest ecosystems, we propose that changing tree growth rates are more likely to reflect shifts in allocation rather than changes in overall productivity. Only a whole NPP allocation perspective can correctly interpret the relationship between changes in growth and changes in productivity.

Neuropatía del nervio pudendo post parto vaginal / Pudend Nerv neuropaty postparto vaginal

Se presenta un caso de neuropatía del nervio pudendo, pos parto vaginal en una paciente segundigesta de 30 años, por­tadora de un síndrome muy raro (NPV). La sintomatología mas importante es el dolor perineal que puede asociarse a disfuncion urinaria, anal e incluso sexual; para el diagnostico es importante utilizar dos criteros mayores, o un criterio mayor y dos criterios menores y el tratamiento debe ser siempre secuencial e incluir tres etapas.

We present a pudend nerve neuropathy, pos parto vaginal case in a 30 year old secondgest, carried of a very strange sindrome (NPV). The most important synthomwas perineal pain which can be asociated qith urinary disfunction or even sexual diosfunction; for the diagnosis is important to use two major criterias or una major criteria and two lesser criterias, and the tratment must always be secuencial and must include three stages.