【摘 要】
：
2014～2015年4个季节对珠江口水域叶绿素a、初级生产力进行了调查研究.结果显示：整个海区叶绿素a(0.47～7.41 mg·m-3)、初级生产力(2.49～124.37mg C·m-3h-1)季节变化趋势均为春季＞夏季＞秋季＞冬季,并且叶绿素a与初级生产力之间存在极显著正相关关系.该海区整合初级生产力年平均为612.79mg C.m-2d-1,季节变化趋势春季＞秋季＞夏季＞冬季.珠江口表层光
【机 构】
：
中国科学院南海海洋研究所 海洋生物资源可持续利用重点实验室,广东 广州 510301;中国科学院大学,北京 100049;中国科学院南海海洋研究所 广东省应用海洋生物学重点实验室,广东 广州 5103
【出 处】
：
第五届全国海洋生态研讨会暨中国生态学学会海洋生态专业委员会2015年学术年会
论文部分内容阅读
2014～2015年4个季节对珠江口水域叶绿素a、初级生产力进行了调查研究.结果显示：整个海区叶绿素a(0.47～7.41 mg·m-3)、初级生产力(2.49～124.37mg C·m-3h-1)季节变化趋势均为春季＞夏季＞秋季＞冬季,并且叶绿素a与初级生产力之间存在极显著正相关关系.该海区整合初级生产力年平均为612.79mg C.m-2d-1,季节变化趋势春季＞秋季＞夏季＞冬季.珠江口表层光合碳同化速率(I)年平均为11.59 h-1,范围2.07～24.96 h-1,内伶仃洋水域光合碳同化速率明显低于外伶仃洋,冬季相反.溶解无机氮(DIN)、硅酸盐(SiO32-)主要为陆源输入.珠江口DIN：PO4-过高,海区平均冬季(83)最低,夏季(512)最高,潜在的磷限制现象严重.春季浮游植物可能存在暂时的爆发式增长.
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