Effects of UV-radiation on seaweeds
1 IntroductionDepletion of stratospheric ozone over the Arctic region (Müller et al. 1997; Rex et al. 1997) causes an increase of UV-B radiation (280-315 nm) and could affect algal distribution patterns in the unique marine ecosystem (Wiencke et al. 2000). To date, most of the recent investigations...
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ftawi:oai:epic.awi.de:14058 2023-09-05T13:13:05+02:00 Effects of UV-radiation on seaweeds Hanelt, Dieter Wiencke, Christian Bischof, Kai 2007 https://epic.awi.de/id/eprint/14058/ https://hdl.handle.net/10013/epic.24403 unknown Hanelt, D. , Wiencke, C. and Bischof, K. (2007) Effects of UV-radiation on seaweeds , In: Ørbæk JB (eds) Arctic alpine ecosystems and people in a changing environment, Springer, Berlin, ISBN: 3-540-48512-4 . hdl:10013/epic.24403 EPIC3In: Ørbæk JB (eds) Arctic alpine ecosystems and people in a changing environment, Springer, Berlin, pp. 250-277, ISBN: 3-540-48512-4 Inbook peerRev 2007 ftawi 2023-08-22T19:50:57Z 1 IntroductionDepletion of stratospheric ozone over the Arctic region (Müller et al. 1997; Rex et al. 1997) causes an increase of UV-B radiation (280-315 nm) and could affect algal distribution patterns in the unique marine ecosystem (Wiencke et al. 2000). To date, most of the recent investigations on biological effects of UV radiation on marine ecosystems have concentrated on the Southern Ocean due to the huge "ozone hole" over Antarctica (Holm-Hansen et al. 1993a,b). Increasing ozone depletion over the northern Hemisphere (Blumthaler and Ambach 1990; Wängberg et al. 1996) may also have the potential to change growth conditions for macroalgae and other organisms, especially in Arctic waters. Therefore, in recent years several studies on the distribution and the physiology of several algal species growing in the Arctic environment have been undertaken to investigate the effects of ultraviolet radiation on seaweeds (e.g. Hanelt et al. 1997a; Bischof et al. 1998; Karsten et al. 1998, 1999). In coastal sea wa-ters, UV radiation (UV) and blue light are strongly attenuated (Björn 1993), and this depends largely on the input of dissolved organic matter (DOM) from terrestrial ecosystems. This occurs often during the warmer seasons due to rainfall or melt water from snow layers and glaciers. Moreover, the absolute UV irradiation depends also on the clouds, solar altitude or sun angle which is much lower in the Arctic than at temperate zones. That means that already double of UV-B radiation is impinging on the earth surface in a temperate latitude 20o lower, which needs to be considered for discussing the UV problem in polar regions. However, in comparison to temperate species polar algae are more sensitive to UV.In spring, coinciding with low temperatures and clear water conditions, the harmful UV wavelengths penetrate deeply into the water column in Kongsfjorden (Svalbard; Hanelt et al. 2001). The threshold irradiance with the potential to affect primary plant productivity negatively was still found at about 5-6 m ... Book Part Antarc* Antarctica Arctic Arctic Kongsfjord* Kongsfjorden Southern Ocean Svalbard Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Holm-Hansen ENVELOPE(162.183,162.183,-77.600,-77.600) Southern Ocean Svalbard Wiencke ENVELOPE(-63.417,-63.417,-64.500,-64.500) |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
1 IntroductionDepletion of stratospheric ozone over the Arctic region (Müller et al. 1997; Rex et al. 1997) causes an increase of UV-B radiation (280-315 nm) and could affect algal distribution patterns in the unique marine ecosystem (Wiencke et al. 2000). To date, most of the recent investigations on biological effects of UV radiation on marine ecosystems have concentrated on the Southern Ocean due to the huge "ozone hole" over Antarctica (Holm-Hansen et al. 1993a,b). Increasing ozone depletion over the northern Hemisphere (Blumthaler and Ambach 1990; Wängberg et al. 1996) may also have the potential to change growth conditions for macroalgae and other organisms, especially in Arctic waters. Therefore, in recent years several studies on the distribution and the physiology of several algal species growing in the Arctic environment have been undertaken to investigate the effects of ultraviolet radiation on seaweeds (e.g. Hanelt et al. 1997a; Bischof et al. 1998; Karsten et al. 1998, 1999). In coastal sea wa-ters, UV radiation (UV) and blue light are strongly attenuated (Björn 1993), and this depends largely on the input of dissolved organic matter (DOM) from terrestrial ecosystems. This occurs often during the warmer seasons due to rainfall or melt water from snow layers and glaciers. Moreover, the absolute UV irradiation depends also on the clouds, solar altitude or sun angle which is much lower in the Arctic than at temperate zones. That means that already double of UV-B radiation is impinging on the earth surface in a temperate latitude 20o lower, which needs to be considered for discussing the UV problem in polar regions. However, in comparison to temperate species polar algae are more sensitive to UV.In spring, coinciding with low temperatures and clear water conditions, the harmful UV wavelengths penetrate deeply into the water column in Kongsfjorden (Svalbard; Hanelt et al. 2001). The threshold irradiance with the potential to affect primary plant productivity negatively was still found at about 5-6 m ... |
format |
Book Part |
author |
Hanelt, Dieter Wiencke, Christian Bischof, Kai |
spellingShingle |
Hanelt, Dieter Wiencke, Christian Bischof, Kai Effects of UV-radiation on seaweeds |
author_facet |
Hanelt, Dieter Wiencke, Christian Bischof, Kai |
author_sort |
Hanelt, Dieter |
title |
Effects of UV-radiation on seaweeds |
title_short |
Effects of UV-radiation on seaweeds |
title_full |
Effects of UV-radiation on seaweeds |
title_fullStr |
Effects of UV-radiation on seaweeds |
title_full_unstemmed |
Effects of UV-radiation on seaweeds |
title_sort |
effects of uv-radiation on seaweeds |
publishDate |
2007 |
url |
https://epic.awi.de/id/eprint/14058/ https://hdl.handle.net/10013/epic.24403 |
long_lat |
ENVELOPE(162.183,162.183,-77.600,-77.600) ENVELOPE(-63.417,-63.417,-64.500,-64.500) |
geographic |
Arctic Holm-Hansen Southern Ocean Svalbard Wiencke |
geographic_facet |
Arctic Holm-Hansen Southern Ocean Svalbard Wiencke |
genre |
Antarc* Antarctica Arctic Arctic Kongsfjord* Kongsfjorden Southern Ocean Svalbard |
genre_facet |
Antarc* Antarctica Arctic Arctic Kongsfjord* Kongsfjorden Southern Ocean Svalbard |
op_source |
EPIC3In: Ørbæk JB (eds) Arctic alpine ecosystems and people in a changing environment, Springer, Berlin, pp. 250-277, ISBN: 3-540-48512-4 |
op_relation |
Hanelt, D. , Wiencke, C. and Bischof, K. (2007) Effects of UV-radiation on seaweeds , In: Ørbæk JB (eds) Arctic alpine ecosystems and people in a changing environment, Springer, Berlin, ISBN: 3-540-48512-4 . hdl:10013/epic.24403 |
_version_ |
1776203346045042688 |