Climate change is partly to blame, but also dams upstream on the Mekong River that choke the flow of freshwater.

气候变化是部分原因，但湄公河上游的大坝也阻遏了淡水的流动。

He said that the DNA information can help authorities target poachers and “choke the flow of ivory into the complex criminal networks.”

他说这些DNA信息能帮助当局确定盗猎者，并“遏制象牙流向复杂的犯罪网络”。