Strong Sensitivity of Red Sea Zooplankton to UV-B Radiation
- 476 Downloads
The impacts of UV-B radiation to Red Sea coastal zooplankton was assessed experimentally at the time (May/June) of peak UV-B radiation, using the most abundant zooplankton species in the community (eight copepod genera, a cladoceran, an ostracod, a cumacean, and two meroplankton, including crab zoeae and megalopa). Mortality rates increased greatly in the presence of ambient UV-B radiation for all species tested except for Labidocera, Macrosetella, and the crab megalopa larvae. Mortality rates declined, on average, threefold when UV-B radiation was removed. These results provide evidence that Red Sea zooplankton are highly vulnerable to ambient levels of UV-B radiation.
KeywordsUV-B impacts Copepods Holoplankton Meroplankton Red Sea
This work was funded by the Deanship of Scientific Research (DSR), King Abdulaziz University (grant no. 1-150/1433 HiCi). The authors, therefore, acknowledge with thanks the DSR technical and financial support. We thank Mr. Muaadh Al-Nuwarah, Mr. Ahmed Al-Haj, and Mr. Reny Devassy for their help in the field and the laboratory. We also thank Dr. Sambhu Chithambaran for providing facilities in the fish farm and Mr. Salman A. Al-Ahmadi and Mr. Bandar Al-Shareef for logistic assistance.
- Browman, H.I., C.A. Rodriquez, F. Beland, J.J. Cullen, R.F. Davis, J.H.M. Kouwenberg, P.S. Kuhn, B. McArthur, J.A. Runge, J.-F. St-Pierre, and R.D. Vetter. 2000. Impact of ultraviolet radiation on marine crustacean zooplankton and ichthyoplankton: a synthesis of results from the estuary and Gulf of St. Lawrence, Canada. Marine Ecology-Progress Series 199: 293–311.CrossRefGoogle Scholar
- McKinlay, A.F., and B.L. Diffey. 1987. A reference action spectrum for ultra-violet induced erythema in human skin. In Human exposure to ultraviolet radiation: risks and regulations, ed. W.F. Passchier and B.F.M. Bosnajakovic, 83–87. Amsterdam: Elsevier.Google Scholar
- Mojib, N., M. Amad, M. Thimma, N. Aldanondo, M. Kumaran, and X. Irigoien. 2014. Carotenoid metabolic profiling and transcriptome‐genome mining reveal functional equivalence among blue‐pigmented copepods and appendicularia. Molecular ecology 23: 2740–2756.Google Scholar
- Raitsos, D.E., I. Hoteit, P.K. Prihartato, T. Chronis, G. Triantafyllou, and Y. Abualnaja. 2011. Abrupt warming of the Red Sea. Geophysical Research Letters 38: DOI: 10.1029/2011GL047984.
- Williamson, C.E., J.M. Fischer, S.M. Bollens, E.P. Overholt, and J.K. Breckenridge. 2011. Toward a more comprehensive theory of zooplankton diel vertical migration: Integrating ultraviolet radiation and water transparency into the biotic paradigm. Limnology and Oceanography 56: 1603–1623.CrossRefGoogle Scholar