United States Environmental Protection Agency

Chlorophyll a (Chl a) should still be considered to be the prime indicator of microalgal production at the base of estuarine and coastal food webs. ... However, the CASAC notes that N deposition may be up to ~16 kg N/ha/yr adjacent to areas of the Mojave and Colorado deserts downwind of or near urban areas (Fenn et al. 2010). p. 6-157 lines 3 ... ................
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