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Is UV-B radiation affecting charophycean algae in shallow freshwater systems?
de Bakker, NVJ., van Bodegom, PM., van de Poll, WH., Boelen, P., Nat, E., Rozema, J. & Aerts, R., Jun-2005, In : New Phytologist. 166, 3, p. 957-966 10 p.Research output: Contribution to journal › Article › Academic › peer-review
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Is UV-B radiation affecting charophycean algae in shallow freshwater systems? / de Bakker, NVJ; van Bodegom, PM; van de Poll, WH; Boelen, P; Nat, E; Rozema, J; Aerts, R.
In: New Phytologist, Vol. 166, No. 3, 06.2005, p. 957-966.Research output: Contribution to journal › Article › Academic › peer-review
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TY - JOUR
T1 - Is UV-B radiation affecting charophycean algae in shallow freshwater systems?
AU - de Bakker, NVJ
AU - van Bodegom, PM
AU - van de Poll, WH
AU - Boelen, P
AU - Nat, E
AU - Rozema, J
AU - Aerts, R
PY - 2005/6
Y1 - 2005/6
N2 - The objective of this study was to determine the effects of UV-B radiation on charophycean algae under natural conditions, since charophytes enhance water transparency in freshwater systems and levels of UV-B radiation have increased by ozone depletion.Potential and actual UV-B effects were studied by combining a glasshouse experiment in which plants were exposed to various levels of UV-B radiation and field measurements in two freshwater systems dominated by charophytes in the Netherlands.The glasshouse experiment showed that charophytes were sensitive to UV-B radiation. UV-B radiation negatively affected growth, while it increased levels of DNA damage in Chara aspera. Moreover, the charophytes did not seem to develop UV-B screens to protect against UV-B radiation since no increase in UV-B absorbing compounds was found.At field conditions, both spectroradiometrical measurements and DNA dosimeters showed that UV-B radiation was attenuated quickly in both freshwater systems, indicating that UV-B does not reach the submerged charophyte vegetation. However, specific conditions, like fluctuating water tables, may result in UV-B exposure to charophytes for certain periods annually.
AB - The objective of this study was to determine the effects of UV-B radiation on charophycean algae under natural conditions, since charophytes enhance water transparency in freshwater systems and levels of UV-B radiation have increased by ozone depletion.Potential and actual UV-B effects were studied by combining a glasshouse experiment in which plants were exposed to various levels of UV-B radiation and field measurements in two freshwater systems dominated by charophytes in the Netherlands.The glasshouse experiment showed that charophytes were sensitive to UV-B radiation. UV-B radiation negatively affected growth, while it increased levels of DNA damage in Chara aspera. Moreover, the charophytes did not seem to develop UV-B screens to protect against UV-B radiation since no increase in UV-B absorbing compounds was found.At field conditions, both spectroradiometrical measurements and DNA dosimeters showed that UV-B radiation was attenuated quickly in both freshwater systems, indicating that UV-B does not reach the submerged charophyte vegetation. However, specific conditions, like fluctuating water tables, may result in UV-B exposure to charophytes for certain periods annually.
KW - attenuation coefficients
KW - charophycean algae
KW - DNA damage
KW - DNA dosimeters
KW - freshwater ecosystems
KW - growth
KW - UV-B absorbing compounds
KW - UV-B radiation
KW - SOLAR ULTRAVIOLET-RADIATION
KW - INDUCED DNA-DAMAGE
KW - DISSOLVED ORGANIC-CARBON
KW - TERRESTRIAL ECOSYSTEMS
KW - OZONE DEPLETION
KW - REPAIR
KW - LAKES
KW - PHOTOREACTIVATION
KW - ATTENUATION
KW - MACROPHYTES
U2 - 10.1111/j.1469-8137.2005.01377.x
DO - 10.1111/j.1469-8137.2005.01377.x
M3 - Article
VL - 166
SP - 957
EP - 966
JO - New Phytologist
JF - New Phytologist
SN - 1469-8137
IS - 3
ER -
ID: 4324697