New York Times: Unusually cold water in the Gulf of Mexico combined with damage to the food web from the BP oil spill probably caused the premature deaths of hundreds of dolphins in the region, a new report concludes. The study, published in the journal PLoS One, suggests that a perfect storm of events led to the deaths. The researchers cited three specific stresses: an unusually cold winter in 2010, the oil spill from April to July of 2010 and an unusually large and rapid flow of very cold freshwater from melting…