Short term physiological response to light, UVR and temperature stress in Antarctic versus Arctic habitat structuring brown algae
Short term physiological response to light, UVR and temperature stress in Antarctic versus Arctic habitat structuring brown algae
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南极与北极栖息地结构褐藻对光、紫外线和温度应激的短期生理反应
DOI：
10.1127/algol_stud/2016/0274
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Heinrich
中科院分区：
文献类型：
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作者：
Heinrich
海洋巨藻是极地沿海生态系统的关键生物。棕色巨藻主宰着两极半球的岩石海岸，在那里它们形成了巨大的海带床，这是各种生物的栖息地和觅食地。为了比较北极和南极生境结构褐藻对不同非生物因子的生理响应，以Saccharina latissima（北极Kongsfjorden）和Desmarestia anceps（南极Potter Cove）为研究对象，在光合有效辐射（PAR）、紫外线辐射（UVR）和温度的组合下暴露8h ~ 12次。本研究结果为研究柽柳和柽柳的短期非生物胁迫提供了依据。单独温度对光合效率没有影响，而UVR和高PAR使PS II的最大量子产率下降到初始值的30%。特有种安头松对胁迫处理的响应与一般种安头松基本相似，说明安头松对短时间紫外线和温度胁迫具有一定的耐受性。需要更多的数据来预测变化的非生物因子的生物学效应和生态意义，未来的研究应包括几个应激暴露时间和逐渐变化的非生物因子。
Marine macroalgae are key organisms in polar coastal ecosystems. Brown macroalgae dominate rocky shores in both polar hemispheres, where they form huge kelp beds, which are habitat and feeding ground for diverse organisms. To compare physiological response of Arctic vs. Antarctic habitat structuring brown algae to different abiotic factors, Saccharina latissima (Kongsfjorden, Arctic) and Desmarestia anceps (Potter Cove, Antarctic) were exposed for 8h to 12 combinations of photosynthetically active radiation (PAR), UV radiation (UVR) and temperature. The data provide basis information on short term abiotic stress in S. latissima and D. anceps. Temperature alone did not cause changes in photosynthetic efficiency, while UVR and high PAR decreased the maximum quantum yield of PS II down to 30% of the initial values. The endemic species D. anceps showed mostly similar responses to the applied stress treatments compared to the generalist S. latissima, indicating a certain tolerance of D. anceps to short periods of UVR and temperature stress. More data are needed to predict biological effects and ecological implications of changing abiotic factors, future studies should include several stress exposure times and gradual changing abiotic factors.