. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 220 REPORTS FROM THE MBL GENERAL SCIENTIFIC MEETINGS Baseline samples of stream water were collected before and after a storm that occurred 15-16 June, 2000. Each hour during the storm, filtered and unrtltered samples of stream water were col- lected and stage measurements were taken. Discharge was esti- mated from stage measurements. Stream water and rain samples were filtered immediately with glass-fiber filters, stored on ice in the field, and refrigerated at the laboratory until analysis. All filtered samples were analyz
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 220 REPORTS FROM THE MBL GENERAL SCIENTIFIC MEETINGS Baseline samples of stream water were collected before and after a storm that occurred 15-16 June, 2000. Each hour during the storm, filtered and unrtltered samples of stream water were col- lected and stage measurements were taken. Discharge was esti- mated from stage measurements. Stream water and rain samples were filtered immediately with glass-fiber filters, stored on ice in the field, and refrigerated at the laboratory until analysis. All filtered samples were analyzed for NH4 colorimetrically, for Cl, NO,, and SO4 using ion chromatography, and for Na, K, Ca, and Mg by atomic absorption. Unfiltered samples were analyzed for acid neutralizing capacity (ANC) and pH. Total rainfall at the sites ranged from 19 to 46 mm. Maximum stage observed was 25, 12, and 3 cm above base flow at the URB, AG and FOR sites, respectively; maximum discharges were 400, 140, and 70 L/s. Solute concentrations in rain were similar among all sites and much lower than those found in stream water. Base flow values for all solutes were lower at the FOR site than at the other, more developed sites. Sodium and Cl concentrations were high at the URB site, probably because of salting roadways in winter months. Calcium concentrations were high in the AG site, perhaps due to the addition of lime to agricultural fields. During the storm, solute concentrations in stream water of the FOR site were relatively invariant compared to the URB and AG sites (Fig. la-c). Concentrations of NH4 and NO, increased at the beginning of the storm, and trends were similar at the AG and URB sites (Fig. la). Concentrations of other solutes at the URB and AG sites decreased with the onset of the storm (Figs. Ib, c). After the storm, solute concentrations at the AG site increased rapidly toward base flow values (Figs. Ib, c). Stream water discharge from the URB site was the highest of the three ca
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
