BIOLOGICAL WEIGHTING FUNCTION FOR THE INHIBITION OF PHYTOPLANKTON PHOTOSYNTHESIS BY ULTRAVIOLET-RADIATION
BIOLOGICAL WEIGHTING FUNCTION FOR THE INHIBITION OF PHYTOPLANKTON PHOTOSYNTHESIS BY ULTRAVIOLET-RADIATION
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DOI：
10.1126/science.258.5082.646
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发表时间：
1992-10-23
期刊：
影响因子：
56.9
通讯作者：
LESSER, MP
中科院分区：
文献类型：
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作者：
CULLEN, JJ;NEALE, PJ;LESSER, MP
南极上空平流层臭氧的严重减少使人们日益关注紫外线B（UVB）辐射（280至320纳米）的生物效应。测量光合作用的实验系统中，浮游植物暴露在一个广泛的辐照处理，适合的分析模型，提供光谱生物加权函数，可用于预测臭氧消耗对水生光合作用的短期影响。结果表明，UVA（320至400纳米）显着抑制海洋硅藻和甲藻的光合作用，UVB的影响甚至更严重。该模型的应用表明，南极臭氧洞可能会减少近地表光合作用的12%至15%，但在深度较少。该实验系统使自然浮游植物光谱权重的常规估计成为可能。
Severe reduction of stratospheric ozone over Antarctica has focused increasing concern on the biological effects of ultraviolet-B (UVB) radiation (280 to 320 nanometers). Measurements of photosynthesis from an experimental system, in which phytoplankton are exposed to a broad range of irradiance treatments, are fit to an analytical model to provide the spectral biological weighting function that can be used to predict the short-term effects of ozone depletion on aquatic photosynthesis. Results show that UVA (320 to 400 nanometers) significantly inhibits the photosynthesis of a marine diatom and a dinoflagellate, and that the effects of UVB are even more severe. Application of the model suggests that the Antarctic ozone hole might reduce near-surface photosynthesis by 12 to 15 percent, but less so at depth. The experimental system makes possible routine estimation of spectral weightings for natural phytoplankton.