scholarly journals Report of progress of stream measurements for the calendar year 1904, Part V, Eastern Mississippi River drainage

1905 ◽  
Keyword(s):  
Mississippi River ◽  
River Drainage

Paddlefish Management, Propagation, and Conservation in the 21st Century

2009 ◽  
Keyword(s):  
Mississippi River ◽  
Entire Range ◽  
Population Characteristics ◽  
Ohio River ◽  
River Drainage ◽  
Temporal And Spatial Variability ◽  
Class Strength ◽  
Catch Rates ◽  
Future Work ◽  
River Drainages

<em>Abstract.</em>—The paddlefish <em>Polyodon spathula </em>occurs in the Mississippi and Ohio River drainages, as well as in several Gulf of Mexico tributaries. Populations throughout the Mississippi and Ohio River drainages have been relatively well studied, often relative to their exploitation. In contrast, the genetically distinct Alabama River drainage population has been studied relatively little. Here, we use both historical work and our own research conducted since 1992 to summarize population characteristics of the Alabama River paddlefish population and compare them to other stocks. We also examine the influence of flow on catch rates in the upstream reaches of this drainage during 1998–2003 and suggest where future work is needed to conserve this unique stock. Spawning temperatures and age at maturity were similar between Alabama and Mississippi river populations, and flow and adult paddlefi sh catch rates were positively related, suggesting that year-class strength may be related to flow, as has been shown for other populations. However, Alabama River paddlefish can spawn more frequently, grow faster, and have a much shorter life span. Previous work suggested that paddlefish throughout the Alabama River drainage were genetically distinct from other stocks, and recent work suggests that differences may exist between fish from the upper Alabama River and lower Alabama River. We argue that additional work with Alabama River drainage populations should focus on three areas: (1) detailed genetic work to identify differences among areas within the Alabama River drainage, as well as with other drainages; (2) quantify temporal and spatial variability in population characteristics of paddlefish throughout the entire range of the Alabama River drainage; and (3) quantify year-class strength and correlate it with flow/discharge to eventually predict recruitment and year-class strength in this unique stock.

All mixed up: Pb isotopic constraints on the transit of sands through the Mississippi-Missouri River drainage basin, North America

2019 ◽  
Vol 131 (9-10) ◽  
pp. 1501-1518 ◽  
Author(s):  
Aoife Blowick ◽  
Peter Haughton ◽  
Shane Tyrrell ◽  
John Holbrook ◽  
David Chew ◽  
...  
Keyword(s):  
North America ◽  
Mississippi River ◽  
Drainage Basin ◽  
Volcanic Rocks ◽  
Missouri River ◽  
Initial Step ◽  
Accessory Mineral ◽  
River Drainage ◽  
The North ◽  
River Drainage Basin

Abstract Pb isotope data from over 2400 detrital K-feldspars in >50 modern sands sampled across the Mississippi-Missouri River drainage basin of North America have been collected in order to construct the first basin-wide provenance model using geochemical signals in a framework, rather than an accessory, mineral. This study represents a critical initial step in understanding the long-term routing of framework sand grains through the Mississippi-Missouri River drainage basin. Four unique Pb isotopic groups, otherwise petrographically and geochemically indistinguishable, are identifiable. Source comparisons reveal two groups corresponding to the Archean Superior and Wyoming terranes to the north of the catchment. The remaining two Pb groups represent a mixture of Appalachian, Grenville and older Granite-Rhyolite, and Yavapai-Mazatzal sourced-grains in the east of the catchment, with noteworthy input from Cenozoic volcanic rocks along the western fringe of the catchment to tributaries west of the Mississippi River, confirming prior assertions of zircon recycling in the lower drainage basin. Tracing suites of Pb isotopic groups provide a detailed map of previously undocumented tributary mixing and reveals the importance of long-lived, naturally formed impoundments in the Upper Mississippi River, which locally sequester and release sand. Tentative proportioning of sediment contributions to the terminus of the Mississippi River from individual tributaries produces similar results to recent U-Pb zircon models, boding well for the use of framework grain based modeling of sediment fluxes. The study is the largest application of Pb-in-K-feldspar fingerprinting to date and advocates its potential as a new and necessary tool for constraining relative source contributions to sinks—which will have wide applicability—especially if combined with provenance information from detrital grains of varying resilience, within large drainage systems.

Sign in / Sign up

Export Citation Format

Share Document