Abstract


EFFECT OF MULTIPLE AND SYNERGISTIC STRESSES ON CORALS AT MICRO/NANO SCALE

Global environmental changes are recently occurring faster than any other time. The resulting combinations of natural and anthropogenic disturbances are strongly affecting coral reef communities. Coral damage can be caused both by abiotic factors (temperature, nutrients inputs, etc) and biotic factors (overgrowth of algae, diseases). These factors acting mostly in synergy had resulted in world-wide coral reef deterioration. Coral bleaching is the most impacting process that is affecting coral survival under elevated sea surface temperature and high irradiance scenario. Bleaching is well known to occur around the world; however its mechanism is not well understood. This is due to the high complexity of the “coral holobiont” (coral in symbiosis with its zooxanthellae and a microbial community that is maintain a delicate balance to keep the coral healthy. A novel point of view of bleaching mechanism using micro/nano size scales will be presented: 1) Study of pigments during thermal induced bleaching revealed that bleaching is a detoxification strategy to avoid oxidative stress; 2) Synergistic action of thermal stress with pathogenic bacteria exacerbates bleaching process and 3) Synergistic effect of thermal stress in a nitrate enriched environment can impede the recovery of corals after a bleaching event, turning the corals to be more susceptible to other environmental or anthropogenic stressors. This scientific approach to study the effects of multiple stresses at micro/nano scales revealed the importance of organisms' adaptations within certain thresholds

Authors

Casareto, B. E., Shizuoka University, Japan, dcbeatr@ipc.shizuoka.ac.jp

Suzuki, Y., Shizuoka University, Japan, seysuzu@ipc.shizuoka.ac.jp

Suzuki, T., Shizuoka University, Japan, suzuki.toshiyuki@shizuoka.ac.jp

Chumun, P. K., Univ. of Mauritius, Mauritius, shashi.chumun@gmail.com

Details

Oral presentation

Session #:36
Date: 06/23/2016
Time: 15:30
Location: 306 A/B

Presentation is given by student: No