Global Climate Change Inequity: Who’s Carrying Whom?

by Coco Coyle

Because the Earth’s atmosphere intermixes globally, all areas of the globe are equally exposed to greenhouse gas emissions (GHGs). However, some countries are more vulnerable to the effects of these emissions, while some countries release more GHGs into the atmosphere than others. Althor et al. (2016) compare each country’s vulnerability to climate change to its creation of GHGs for the years 2010 and 2030. They found that the countries least vulnerable to climate change were higher GHG emitters, and the most vulnerable countries were least responsible for GHG emissions. By 2030 the inequity will have worsened. The authors call for climate change policies that place more responsibility for mitigating climate change on the high-emitters. Continue reading

Algal Symbionts may make Corals Resistant to Rising Sea Temperatures

by Kimberly Coombs

Corals share a mutualistic relationship with algal symbionts, but with increasing sea temperatures, these symbionts become expelled from the coral. The loss of symbionts causes the corals to become bleached and there have been declines of coral cover worldwide. Recent research has shown that there may be symbionts that are thermotolerant, such as the genus Symbiodinium, which may help reduce the amount of bleaching episodes seen amongst corals. Symbiodinium is divided into nine subgeneric clades, A-I, and the Symbiodinium D1a has been documented showing thermotolerance. Continue reading