【摘 要】
：
理解湖泊生态系统如何响应气候环境变化对制定社会的适应政策非常重要，但是目前的研究手段如现场监测、实验、模型均不能区分湖泊生态系统对自然状况和人类活动影响状况的响应。本文对青藏高原一个无鱼的湖泊过去1000年的记录进行研究，发现湖泊生态系统尤其是生产力在自然状况和人类活动影响下存在显著变化。过去1000年内温度变化主要受太阳活动影响，而湖泊环境在过去200年内受人类活动影响显著，湖泊生产力发生相应的
【机 构】
：
中国科学院青藏高原研究所,100101
【出 处】
：
“全球变化下的海洋与湖沼生态安全”学术交流会
论文部分内容阅读
理解湖泊生态系统如何响应气候环境变化对制定社会的适应政策非常重要，但是目前的研究手段如现场监测、实验、模型均不能区分湖泊生态系统对自然状况和人类活动影响状况的响应。本文对青藏高原一个无鱼的湖泊过去1000年的记录进行研究，发现湖泊生态系统尤其是生产力在自然状况和人类活动影响下存在显著变化。过去1000年内温度变化主要受太阳活动影响，而湖泊环境在过去200年内受人类活动影响显著，湖泊生产力发生相应的变化。在自然状况下，较高的湖泊初级和次级生产力发生在温度较低、湖水盐度较高和营养盐含量较高时，而在人类活动影响下，较高的湖泊生产力发生在温度较高时期，其主要受由人类活动带来的营养盐元素含量控制。这不仅表明青藏高原湖泊环境在过去200年内明显受到了人类活动影响，并且表明人类活动影响下湖泊生态系统发生了显著的改变。
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