四川四姑娘山长坪沟无鱼类生存的成因探讨

A Discussion on the Causes for Non-existence of Fishes in the Changping Valley, Mt. Siguniang

长坪沟无鱼类生存 ,而周边沟谷流域却有大量鱼类生存。究其原因 ,是因为长坪沟中上游为大面积花岗岩出露区 ,且沿沟分布有大量花岗岩冰川漂砾 ,由此类岩石形成的土壤中Mo、U、Th等微量元素含量均高于区内平均值 ,而Ni、Se却低于区内平均值。这些微量元素的异常 ,干扰了鱼类P和Ca的代谢 ,导致Ca/P比例失调 ,使鱼类生长受抑制 。

Non fishes existence in the Changping Valley which results from granite rich in Mo, U, Th and poor in Ni, Se. These anomalous minor elements disturb the supersession of P and Ca which results in Ca/P disproportion and fishes' death.