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Distribution and frequency of submersed aquatic vegetation in the Upper Mississippi River System are monitored as part of the Long Term Resource Monitoring Program. This report summarizes results of sampling aquatic vegetation along fixed transects in Navigation Pools 4, 8, 13, and 26 in the Upper Mississippi River and La Grange Pool in the Illinois River in 1996. Plants were sampled at regular intervals along fixed transects using a modified rake technique. Sampling was conducted twice during the growing season (spring and summer). Twenty-four submersed and rooted floating-leaved species were found. Most species were found in Pools 4, 8, and 13. Pool 26 had the fewest (3) number of species and Pool 4 had the greatest...
Aquatic vegetation of the Upper Mississippi River System is monitored as part of the Long Term Resource Monitoring Program. This report summarizes the 1993 effort of monitoring submersed aquatic vegetation (SAV) along permanently established transects in vegetated locations within certain LTRMP study reaches, specifically Pools 4, 8, 13, and 26 of the Upper Mississippi River and La Grange Pool of the Illinois River. Data are collected during two sampling windows, mid-May through mid-June, and mid-July through August. Fifteen species of SAV were found along transects during the 1993 season. The greatest number of species found (12) was in Pool 4 and the fewest number found (2) was in Pool 26. Coon's tail and sago...
Distribution and frequency of aquatic vegetation in the Upper Mississippi River System are monitored as part of the Long Term Resource Monitoring Program. This report summarizes results of sampling aquatic vegetation along fixed transects in Navigation Pools 4, 8, 13, and 26 in the Upper Mississippi River and La Grange Pool of the Illinois River in 1995. Pool 26 includes 12 miles of the Illinois River upstream of its confluence with the Mississippi River; all of the backwaters surveyed in this river reach are on the lower Illinois River. Plants were sampled using a modified rake technique along fixed transects. Data from additional qualitative surveys (or informals) was used to augment species records in each pool....
Aquatic vegetation of the Upper Mississippi River System is monitored as part of the Long Term Resource Monitoring Program. This report summarizes the 1994 effort of monitoring submersed aquatic vegetation (SAV) along transects permanently established in vegetated locations within four navigation pools of the Upper Mississippi River and one navigation pool of the Illinois River. A total of 17 species of SAV were found along transects during the 1994 season. Several additional species were found during informal surveys. More species of submersed aquatic macrophytes were found along transects in lower Pool 4 than in any other reach. Across all pools, sago pondweed (Potamogeton pectinatus) was the species most frequently...
Aquatic vegetation of the Upper Mississippi River System is monitored as part of the Long Term Resource Monitoring Program. This report summarizes the 1992 effort of monitoring submersed aquatic vegetation (SAV) along transects permanently established in vegetated locations within four navigation pools of the Upper Mississippi River and one navigation pool of the Illinois River. More species of submersed aquatic macrophytes were found along transects in lower Pool 4 than in any other reach. La Grange Pool and Pool 26 transects had the fewest species. Across all pools, sago pondweed (Potamogeton pectinatus) and coon's tail (Ceratophyllum demersum) were the species most frequently found. Several species of SAV were...
Aquatic vegetation of the Upper Mississippi River System is monitored as part of the Long Term Resource Monitoring Program. This report summarizes the 1991 effort of monitoring submersed aquatic vegetation (SAV) along transects permanently established in vegetated locations in four navigation pools of the Upper Mississippi River and one navigation pool of the Illinois River. Seventeen species of submersed aquatic plants were found along transects in Pools 4, 8, 13, 26, and La Grange Pool. The highest number of submersed aquatic plant species found in any one pool was 16 in Pool 4 and the lowest number was 6 in La Grange Pool. Coon's tail (Ceratophyllum demersum) and sago pondweed (Potamogeton pectinatus) were the...
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