SeaTurtle.org Resources

We’ve already posted about the Changing Oceans special issue of Science, but we think it’s important to focus on how climate change is affecting marine wildlife habitat.

Marine ecosystems are centrally important to the biology of the planet, yet a comprehensive understanding of how anthropogenic climate change is affecting them has been poorly developed. Recent studies indicate that rapidly rising greenhouse gas concentrations are driving ocean systems toward conditions not seen for millions of years, with an associated risk of fundamental and irreversible ecological transformation. The impacts of anthropogenic climate change so far include decreased ocean productivity, altered food web dynamics, reduced abundance of habitat-forming species, shifting species distributions, and a greater incidence of disease. Although there is considerable uncertainty about the spatial and temporal details, climate change is clearly and fundamentally altering ocean ecosystems. Further change will continue to create enormous challenges and costs for societies worldwide, particularly those in developing countries.

Authors Hoegh-Guldberg and Bruno acknowledge that “change has been the norm as Earth has swung through a variety of states in which life has prospered, dwindled, or experienced calamitous declines” as well as the fact that “long-term studies of climate change in the oceans are rare by comparison to those on land.” They go on to cite study after study indicating that there is plenty of evidence that change is rapid and driven, at least in part, by human activity. Changing ocean temperatures and composition mean changing currents and nutrient cycles.

Especially visible are the effects of climate change on “habitat-forming species such as corals, sea grass, mangroves, salt marsh grasses, and oysters.” When these species are at risk, so are the many species dependent on them. Of course, warmer oceans expands the potential habitat for some. We see warm-water species ranging from sea turtles to sea urchins expanding beyond their normal ranges, but the expansion of warm waters also means the expansion of marine-based diseases and parasites.

Over all, it’s important that the conservation community to continue its research as we try to understand more about our changing oceans. We remain committed to playing our role in contributing to scientific understanding. We also continue to take cutting-edge science to the field as we work to mitigate climate change and restore and conserve wildlife habitat from ridge to reef.

“The ocean is a dynamic and rapidly evolving environment, a long-appreciated truth which becomes increasingly apparent as we observe it ever more carefully.”

Last month, Science magazine ran a special issue on ocean science and ocean conservation. We especially liked the updates on new technologies for studying the ocean. Two such examples are buoys and fiber-optic cables.

• Buoys: There are now over 4000 science buoys in the world’s oceans, gathering temperatures, wave heights, wind speeds, water conductivity profiles, and helping scientists understand ocean dynamics better than ever before.
• Fiber-Optic Cables: Strung from shore and across the ocean floor, fiber-optic cables are gathering data on crustal dynamics and deep-sea ecosystems.

We were also interested in the piece on ocean garbage patches:

Chances are you’ve heard of the Great Pacific Garbage Patch, the vast mass of floating debris midway between Hawaii and California that is twice the size of Texas. Although many media stories conjure up a chunky soup of bottles and tires, it is mostly an unstrained consommé of small bits of floating plastic. And it isn’t the only one. A similar accumulation of plastic particles—which include weathered fishing line, Styrofoam, wrappers, and raw resin pellets—has shown up in the North Atlantic Ocean. But the potential harm to marine life is far from clear.

Most of the floating debris is small enough that it’s difficult to determine what happens to it. It’s also small enough to be ingested by marine life low on the food chain. Further study is necessary to understand what is happening to plastic particulate and how much of its chemicals are absorbed into animal tissue.

Paso Pacífico’s sea turtle program is made possible through collaboration and information sharing with scientists around the world. Our work with the Eastern Pacific Hawksbill Initiative (ICAPO) focuses on the Hawksbill turtle, one of the rarest, most endangered sea turtles in the Eastern Pacific. Last year, Paso Pacífico and scientists from this network successfully placed the first satellite tag on a Hawksbill Sea Turtle in Nicaragua, allowing us to track the path of two Hawksbill turtles through the ocean and learn more about their migration patterns and foraging habits.

This month, the network is holding its “2nd Workshop on Hawksbill Sea Turtles of the Eastern Pacific” in Nicaragua. This meeting will bring together conservation scientists across the region to discuss innovative conservation tools for saving this beautiful turtle from extinction.