Effects of common carp (Cyprinus carpio) on submerged macrophytes and water quality in a backwater lake on the Upper Mississippi River
Macrophyte populations have recently decreased in the Upper Mississippi River (UMR). This decline may be due to abiotic factors, such as a reduction in nutrients; however, biotic factors are also suspect. The common carp Cyprinus carpio has been reported to affect submerged macrophyte populations in other systems but not in the UMR. This study was conducted to determine if common carp can directly or indirectly reduce submerged macrophyte biomass. Twelve enclosures (25 m2) and four reference sites were constructed in Lawrence Lake, a backwater in the UMR, and stocked with one of three densities (0, 1, 10) of common carp. High densities of common carp (10/enclosure or approximately 7000 kg/ha) significantly reduced...
1988 Operating Plan of the Long Term Resource Monitoring Program for the Upper Mississippi River System
A depth-integrated finite-element model (RMA-2V) was applied on a section of the Upper Mississippi River to study the hydraulic characteristics of the floodplain-river system. The area that has been modeled is called "Montrose Flats." Aquatic vegetation is abundant at this location, and the flow structure needs to be evaluated in order to study the nutrient transport conditions within this area. The present study focused on a large oval eddy that was observed to form in this area near the downstream end of the Devil's Creek delta. Causative factors for this eddy were examined by using this numerical model. Results indicate that the eddy can be simulated by this model and that numerical study is a feasible way to...
This tutorial was prepared for field personnel in the Long Term Resource Monitoring Program (LTRMP) for the Upper Mississippi River System (UMRS) and other river managers who use Environmental Planning and Programming Language version 7 (EPPL7). The data sets included in the tutorial are from the LTRMP geographic information system (GIS) data base, and the exercises cover frequently used GIS procedures.
The Aquatic Habitat Analysis and Visualization Tool is a program and interface that allows users to view and create habitat models using the pre-improvement water quality data collected for the Finger Lakes Habitat Rehabilitation Project (HREP). The Finger Lakes HREP is a hydrologic modification of a backwater lake complex in upper Pool 5 of the Mississippi River. The program and interface were implemented using Arc Macro Language and require the workstation version of ARC/INFO geographic information system software (ESRI, Redlands, CA).
This chapter describes the procedures for digital data entry to be used by the staff at the Environmental Management Technical Center. Included are procedures for creating a coverage, registering a base map, digitizing with an automated program (Production ARCEDIT), generating topology for a coverage, and attributing. The two main issues during this procedure are digitizing error and quality control. The Appendixes contain forms and other information needed for the digital data entry procedure.
Since 1988, the Long Term Resource Monitoring Program (LTRMP) has performed basic limnological field measurements in the Upper Mississippi River System. The period of this report (1993 96) includes a major revision of the LTRMP sampling design in 1993 that added randomization, broader spatial coverage, and increased monitoring of tributaries and locations that allow monitoring of material transport. Monitoring by the Lake City Field Station reported here shows water quality differences among the tributaries to Pools 4 and 5, spatial and temporal patterns within these pools, and the sediment and nutrient trapping effects of Lake Pepin, a natural impoundment of the Mississippi River.
Comparing the effects of local, landscape, and temporal factors on forest bird nest survival using logistic-exposure models
The long-term resource monitoring program: insights into the Asian carp invasion of the Illinois River, Illinois, USA
Synopsis: This article outlines how wetlands can significantly reduce flooding in the Upper Mississippi watershed. The authors first provide a historical context by estimating the original and lost wetland storage capacities of the Upper Mississippi and Missouri River Basins. Historically, about 10% of the basin would have been classified as wetland in 1780. By 1980, wetland acreage had been reduced to only 4% of the basin, representing about 26 million acres of wetlands eliminated since 1780. The area of wetland restoration required to reduce the risk of future flooding adequately was estimated based on the total amount of excess floodwater beyond bank-full discharge that passed through the City of St. Louis during...
Hydraulic functions of retention devices in natural large rivers have been studied. An evaluation of detention devices formed due to side channels, islands, backwaters, and stump fields within the Upper Mississippi Pools has shown that these are quite significant and in some cases these detention areas within the channel borders can occupy as much as 75 to 93% of the total surface area. A large eddy on the order of the width of the Mississippi River in Pool 19 is used to illustrate the travel time in the hydraulic retention areas.
Recent observations of the distribution and status of freckled madtom and first record of spotted gar In Iowa
Dip nets, fish wheels, and motor homes: The Atna', traditional ecological knowledge, and resource management in the Copper River fishery, Alaska
Political ecology is a holistic mode of inquiry that applies political analysis to resource use and access by actors and organizations interacting in defined social and cultural contexts. This thesis uses a political ecology perspective to reveal how the Atna' Athabaskan people of South central Alaska use their knowledge of their environment to articulate a specific claim to Copper River salmon. Three case studies of Atna' public activism are presented demonstrating Atna' practice in governmental regulatory process. The position of the Atna' in the Copper River salmon fishery is contrasted with three other north Pacific Native American salmon regimes in order to demonstrate the special features of the Atna' context.
Satellite boreal measurements over Alaska and Canada during June-July 2004: Simultaneous measurements of upper tropospheric CO, C2H6, HCN, CH3Cl, CH4, C2H2, CH3OH, HCOOH, OCS, and SF6 mixing ratios (DOI 10.1029/2006GB002795)
Selected organic compounds and trace elements in streambed sediments and fish tissues, Cook Inlet Basin, Alaska