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库布齐沙漠蓝藻结皮早期发育过程净光合速率变化特征及其影响因素
Authors
吴易雯
王文欣
饶本强
Publication date
1 January 2013
Publisher
Abstract
将具鞘微鞘藻和爪哇伪枝藻进行原种培养和大量培养,野外接种蓝藻培养物于沙漠地表形成蓝藻结皮,每天测定蓝藻结皮生物量(用叶绿素a表示)以及结皮净光合速率的变化,并每隔2 h测定结皮净光合速率的日进程变化.结果表明,早期发育过程中蓝藻结皮生物量与结皮净光合速率均呈现同步波动性变化,且二者之间呈极显著性相关(r=0.92,P<0.0001),降雨有利于结皮生物量和净光合速率的显著提高.蓝藻结皮净光合速率的日变化进程为双峰型,最大净光合速率为3.78 mg.mg-1.h-1,最小净光合速率为-4.16 mg.mg-1.h-1.相关分析表明,对蓝藻结皮净光合速率日变化影响最大的生态因子是光合有效辐射,其次是结皮表面温度
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Institute of Hydrobiology, Chinese Academy Of Sciences
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Last time updated on 15/03/2018