E
E. Walter Helbling
Researcher at National Scientific and Technical Research Council
Publications - 107
Citations - 5164
E. Walter Helbling is an academic researcher from National Scientific and Technical Research Council. The author has contributed to research in topics: Phytoplankton & Photoinhibition. The author has an hindex of 37, co-authored 106 publications receiving 4681 citations. Previous affiliations of E. Walter Helbling include Shantou University & Xiamen University.
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Journal ArticleDOI
Effects of UV radiation on aquatic ecosystems and interactions with other environmental factors.
Donat-P. Häder,Craig E. Williamson,Sten-Åke Wängberg,Milla Rautio,Kevin C. Rose,Kunshan Gao,E. Walter Helbling,Rajeshwar P. Sinha,Robert C. Worrest +8 more
TL;DR: This assessment addresses how the knowledge of the interactive effects of UV radiation and climate change factors on aquatic ecosystems has advanced in the past four years.
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Anthropogenic pollution of aquatic ecosystems: Emerging problems with global implications
Donat-P. Häder,Anastazia T. Banaszak,Virginia E. Villafañe,Virginia E. Villafañe,Maite Andrea Narvarte,Maite Andrea Narvarte,Raúl González,Raúl González,E. Walter Helbling,E. Walter Helbling +9 more
TL;DR: Five sources of anthropogenic pollution that affect marine and freshwater ecosystems are discussed: sewage, nutrients and terrigenous materials, crude oil, heavy metals and plastics, and the direct and indirect effects that these pollutants have on a range of aquatic organisms even when the pollutant source is distant from the sink.
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Photoacclimation of antarctic marine diatoms to solar ultraviolet radiation
TL;DR: Results provide further evidence that MAA compounds are synthesized in response to high light conditions and that they do decrease the photoinhibitory effects of UVR.
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Solar UV Radiation Drives CO2 Fixation in Marine Phytoplankton: A Double-Edged Sword
TL;DR: UVR can act as an additional source of energy for photosynthesis in tropical marine phytoplankton, though it occasionally causes photoinhibition at high PAR levels and oceanic carbon fixation estimates may be underestimated by a large percentage.
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Ammonium and UV radiation stimulate the accumulation of mycosporine-like amino acids in Porphyra columbina (Rhodophyta) from Patagonia, Argentina
TL;DR: Photoinhibition (as a decrease of optimal quantum yield) was significantly greater under nitrogen‐deprived conditions than that under replete ammonium levels, and positive relationships between maximal GP or ETR and pigment ratios (BP and MAAs/chl a) and negative relationships with chl a concentration were found.