Upper Mississippi River-Pool 4 Time Lag Investigation of Physical Conditions and Submersed Macrophyte Prevalence: Data
Description
The Long-Term Resource Monitoring element (LTRM) of the Upper Mississippi River Restoration program (UMRR) has conducted aquatic vegetation and water quality surveys in several navigation pools since the mid 1990’s. Over a 20-year period (1998-2017), the off-channel (i.e. backwater) areas in upper Pool 4 remained chronically turbid and supported a limited submersed macrophyte community with high between-year variability in the proportion of sites where submersed plants were observed. Water surface elevation and discharge rates also fluctuated substantially within- and between-years in the upper pool. Pearson correlation analysis indicated that between-year change in the proportion of sites where submersed macrophytes are observed is correlated to the number of high summer discharge days 1 year prior (r = -0.48); the number of low summer discharge days during the current year (r =0.46) and one year prior (r = 0.62); minimum discharge (r = 0.52) and the duration that depth at vegetation sample sites was within the estimated photic zone (i.e. a metric that reflects a combination of water clarity and water surface elevation) during the current summer (r = 0.63). Conditions more than one year prior and during the other seasons (winter, spring, fall) exhibited little correlation to subsequent fluctuations in the prevalence of submersed macrophytes.
Resources
| Name |
Format |
Description |
Link |
|
55 |
Landing page for access to the data |
https://doi.org/10.5066/P9WEK9X0 |
|
55 |
The metadata original format |
https://data.usgs.gov/datacatalog/metadata/USGS.5dab3da5e4b09fd3b0c9d21f.xml |
Tags
- upper-mississippi-river
- upper-pool-4
- mississippi-river
- submersed-aquatic-vegetation
- discharge
- biota
- backwater
- pool-4
- macrophyte
- usgs-5dab3da5e4b09fd3b0c9d21f
- photic-zone