Five Reasons We Need To Act Now on Climate Change.

by Paola Salomon
According to Craig Welch (2015) there are five reasons that we need to take action on climate change. The first is the negative impact of global warming on the West Antarctic ice sheet. Since late 19th century the ocean temperature has risen, melting “a significant section of ice in the Amundsen Sea in the Southern Oceans.” Antarctica’s South Dakota-sized Thwaites Glacier has dwindled in the last decades, and once this glacier melts completely it could destabilize other areas of the West Antarctic ice sheet, causing even a more massive melt. In this case, sea levels will rise 16 feet more, affecting hundreds of millions of people. The second reason to take action is the melting permafrost. This icy frozen crust of shrubs and grass found throughout the Arctic can potentially transform the landscape into a feedback loop. Continue reading

Elevated CO2 Affects Tropical Marine Fish Predator-Prey Interactions

by Jennifer Fields

Recent research has demonstrated that exposure to elevated CO2 affects how fish observe their environment, affecting behavioral and cognitive processes leading to increased prey mortality. However, it is unknown if increased prey mortality is caused by changes in kinematics of predator-prey interactions or from just increasing prey activity levels. Allan et al. (2013) studied the effect of anticipated end of this century CO2 concentrations on the predatory-prey interaction of two tropical marine fish. Both a predator and prey fish was exposed to present day and elevated CO2 levels in a cross-factored design. The authors investigated the changes in locomotion performance, prey reaction distance, and capture success of the interaction. Authors found that predators Continue reading