| Title | Effect of stratospheric ozone depletion and enhanced ultraviolet radiation on marine bacteria at Palmer Station, Antarctica in the early austral spring |
| Author | Pakulski, J.D.; Kase, J.P.; Meador, J.A.; Jeffrey, W.H. |
| Author Affil | Pakulski, J.D., University of West Florida, Center for Environmetnal Diagnostics and Bioremediation, Pensacola, FL. Other: Unviersity of Texas |
| Source | Photochemistry and Photobiology, 84(1), p.215-221. Publisher: Wiley-Blackwell published on behalf of the American Society for Photobiology, Oxford, United Kingdom. ISSN: 0031-8655 |
| Publication Date | Feb. 2008 |
| Notes | In English. NSF Grant OPP-9727319. 32 refs. GeoRef Acc. No: 299759. CRREL Acc. No: 64004378 |
| Index Terms | bacteria; ecology; ocean environments; ozone; stratosphere; ultraviolet radiation; Antarctica--Antarctic Peninsula; Antarctic Peninsula; Antarctica; atmosphere; electromagnetic radiation; marine environment; Palmer Station; seasonal variations |
| Abstract | We investigated the interactions between ozone-depleted air masses and subsequent changes in UVB on marine bacterial abundance and production at Palmer Station, Antarctica from September to November 1999. During periods of low total column ozone (TCO), bacterial cell concentrations declined by 57%. Photoinhibition of bacterial [3H]- leucine (Leu) and [3H]-thymidine (TdR) incorporation due to UVB was greatest during periods of low TCO in September and early October. During diel exposure experiments, light treatment samples exhibited ›75-100% inhibition of TdR incorporation by mid- afternoon. Leu incorporation exhibited maximum inhibition (50-100%) at sunset and early evening hours. Leu and TdR incorporation in light treatment samples did not exhibit recovery during subsequent periods of darkness. (mod. journ. abst.) |
| URL | http://hdl.handle.net/10.1111/j.1751-1097.2007.00222.x |
| Publication Type | journal article |
| Record ID | 88317 |