Experimental assessment of UV effects on temperate marine phytoplankton when exposed to variable radiation regimes
نویسندگان
چکیده
منابع مشابه
Experimental assessment of UV effects on temperate marine phytoplankton when exposed to variable radiation regimes
Phytoplankton samples were collected at Bahı́a Engaño, Chubut, Argentina (438S, 658W) at different times of the year to assess the combined effect of ultraviolet radiation (UVR, 280–400 nm) and vertical mixing (i.e., the depth of the upper mixed layer, UML) on photosynthesis. Samples were exposed to fixed and fluctuating radiation regimes in an illuminated chamber at 158C (photosynthetically ava...
متن کاملEffects of ultraviolet radiation on marine virus-phytoplankton interactions.
Abstract Ambient ultraviolet radiation (UVR) is harmful to many biological systems and increased UVR, due to a reduced ozone layer, may have many unforeseen consequences. Viruses are the most abundant biological particles in the sea and are thought to play an important role in the structure and functioning of aquatic ecosystems. Although an increasing number of studies have been published durin...
متن کاملIn situ impact of solar ultraviolet radiation on photosynthesis and DNA in temperate marine phytoplankton
In situ experiments were conducted at various depths in the water column to determine the impact of solar UV radiation (280 to 400 nm) upon photosynthesis and DNA of natural phytoplankton assemblages from mid-latitudes of Patagonia (Bahía Bustamante, Chubut, Argentina; 45° S, 66.5° W). The effects of UV radiation were significant at the surface; however, the impact decreased rapidly with depth:...
متن کاملEffects of UV radiation and nitrate limitation on the production of biogenic sulfur compounds by marine phytoplankton
We tested the effects of UV radiation (UVR) and nitrate limitation on the production of dimethylsulfide (DMS), particulate dimethylsulfoniopropionate (DMSPp), and particulate dimethylsulfoxide (DMSOp) in natural seawater from the Gulf of Mexico and in phytoplankton cultures. DMS/Chl a ratios in PAR-only and PAR + UV-exposed seawater were 0.44–2.0 and 0.46–1.9 nmol DMS mg 1 Chl a, respectively, ...
متن کاملExperimental assessment of cumulative temperature and UV-B radiation effects on Mediterranean plankton metabolism
The Mediterranean Sea is a vulnerable region for climate change, warming at higher rates compare to the global ocean. Warming leads to increased stratification of the water column and enhanced the oligotrophic nature of the Mediterranean Sea. The oligotrophic waters are already highly transparent, however, exposure of Mediterranean plankton to ultraviolet radiation (UV-B and UV-A) may increase ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Limnology and Oceanography
سال: 2002
ISSN: 0024-3590,1939-5590
DOI: 10.4319/lo.2002.47.6.1648