BATON ROUGE, La. (AP) — Preliminary results from field work and lab tests indicate two oil components — naphthalene and methylnaphthlane — are at least partly responsible for declines in insect populations in coastal marshes affected by the 2010 BP oil spill, LSU researcher Linda Hooper-Bui tells The Advocate (http://bit.ly/11Zhavr).

The mystery is why the compounds are increasing, she said.