Browsing by Author "Gersberg, Richard M."

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Biological Assessment of Tecate Creek (U.S.–Mexico) with Special Regard to Self-Purification

Lu¨deritz, Volker; Gerlach, Frauke; Ju¨pner, Robert; Calleros, Jesus; Pitt, Jerome; Gersberg, Richard M.

Macroinvertebrate organisms were sampled at four sites on Tecate Creek (U.S.–Mexico) and quantitatively evaluated using the SIGNAL-w (Stream Invertebrate Grade Number—Average Level-weighted) index. A morphological assessment ...
Levels of the Organophosphorus Pesticide Diazinon in the Chollas Creek Watershed, San Diego CA, since Its Phase-Out in 2004

Watanabe, Kayo; Franz, Karen; Gersberg, Richard M.

In 2004, the organophosphorus pesticide, diazinon, was phased-out for all residential uses in the United States. The objective of this study was to determine the temporal trend of diazinon levels in the Chollas Creek, CA ...