In a sophisticated chemical analysis published Tuesday in Environmental Science & Technology, the team found that DDT-related chemicals were seven times more abundant in coastal condors than condors that fed farther inland. Looking at the birds’ coastal food sources, researchers found that dolphin and sea lion carcasses that washed ashore in Southern California were also seven times more contaminated with DDT than the marine mammals they analyzed along the Gulf of California in Mexico.
One mysterious chemical that is likely connected to the DDT dumping in California was 56 times more abundant in coastal condors and 148 times more abundant in California dolphins.
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