海洋中存在一些海域,那里海水表层的藻类几乎绝迹,在这类海域的生态系统中,初级生产者的数量和种类极少,很难为中下层海域的生物提供足够的食物营养来源,食物链接近断裂,这些地区被人们称为“海洋沙潢”。目前,全球性的气候变暖不仅加速了陆地上的荒漠化速度,也使得“海洋沙漠”的面积迅速扩张,其扩张速度比此前人们预测的还要 There are some sea areas in the ocean, where sea surface algae are almost extinct. In the ecosystems of these sea areas, the number and types of primary producers are very few. It is difficult to provide adequate food nutrition sources for the organisms in the middle and lower seas, and the food links are near to breakage. These areas are known as “marine sands and lakes.” At present, global warming has not only accelerated the speed of desertification on land, but has also allowed the rapid expansion of the area of ​​“marine deserts,” and its expansion rate is even faster than previously expected.