Identifying corals displaying aberrant behavior in Fiji’s Lau Archipelago

[2017]

Molecular biomarkers of 70 corals sampled in the Lau, Province of Fiji were analyzed to determine if the animals showed stress on a sub-cellular level.

Identifying corals displaying aberrant behavior in Fiji’s Lau Archipelago

PLoS ONE 12(5):e0177267
May 24, 2017
By Anderson B. Mayfield, Chii-Shiarng Chen, Alexandra C. Dempsey

Abstract
Given the numerous threats against Earth’s coral reefs, there is an urgent need to develop means of assessing reef coral health on a proactive timescale. Molecular biomarkers may prove useful in this endeavor because their expression should theoretically undergo changes prior to visible signs of health decline, such as the breakdown of the coral-dinoflagellate (genus Symbiodinium) endosymbiosis. Herein 13 molecular- and physiologicalscale biomarkers spanning both eukaryotic compartments of the anthozoan-Symbiodinium mutualism were assessed across 70 pocilloporid coral colonies sampled from reefs of Fiji’s easternmost province, Lau. Eleven colonies were identified as outliers upon employment of a detection method based partially on the Mahalanobis distance; these corals were hypothesized to have been displaying aberrant sub-cellular behavior with respect to their gene expression signatures, as they were characterized not only by lower Symbiodinium densities, but also by higher levels of expression of several stress-targeted genes. Although these findings could suggest that the sampled colonies were physiologically compromised at the time of sampling, further studies are warranted to state conclusively whether these 11scleractinian coral colonies are more stress-prone than nearby conspecifics that demonstrated statistically normal phenotypes.

From Mangrove Mud to Meaningful Work: Desta’s J.A.M.I.N. Journey

Some students I remember for their grades, their quick answers, or a moment that made the whole class laugh. Others I remember for the way they stepped into the mangroves.

Desta was the kind of student who thrived outdoors. While some students hesitated at the edge of the mud, he walked right in. And when he inevitably got stuck — because everyone does — he didn’t get frustrated. He laughed. Covered in mud, holding mangrove propagules in his hands, he embraced the experience fully.

Even then, it was clear that he was connecting with the environment in a way that went beyond the lesson plan…

From Students to Stewards: A Full-Circle Moment for J.A.M.I.N.

There are certain faces you never forget.

Over the years, hundreds of students have stepped into mangrove forests with us through the Jamaica Awareness of Mangroves in Nature (J.A.M.I.N.) program. I may not always remember every name, but I remember the expressions — the hesitation before stepping into thick mud, the laughter when someone loses a shoe, the look of surprise when they catch that unmistakable sulfur smell rising from the mangrove soil…