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20231223071543.0 |
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231223s2005 xx ||||| 00| ||eng c |
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|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a de Bakker, Nancy V J
|e verfasserin
|4 aut
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| 245 |
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|a Is UV-B radiation affecting charophycean algae in shallow freshwater systems?
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|c 2005
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|b nc
|2 rdacarrier
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|a Date Completed 29.06.2005
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|a Date Revised 30.09.2020
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|a published: Print
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|a Citation Status MEDLINE
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|a 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
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a van Bodegom, P M
|e verfasserin
|4 aut
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| 700 |
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|a van de Poll, W H
|e verfasserin
|4 aut
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| 700 |
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|a Boelen, P
|e verfasserin
|4 aut
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|a Nat, E
|e verfasserin
|4 aut
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|a Rozema, J
|e verfasserin
|4 aut
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|a Aerts, R
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 166(2005), 3 vom: 15. Juni, Seite 957-66
|w (DE-627)NLM09818248X
|x 1469-8137
|7 nnns
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| 773 |
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|g volume:166
|g year:2005
|g number:3
|g day:15
|g month:06
|g pages:957-66
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|h 957-66
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