The North American breeding population of northern pintails (Anas acuta) has reached previously unprecedented low numbers 4 times since 1983. Because pintails show high fidelity to wintering areas, regional survival estimates and identification of factors influencing survival are needed to guide management of wintering pintails. We used radiotelemetry to estimate survival rates of female...

Authors

Robert R. Cox, Alan D. Afton, Richard M. Pace

Ecosystems Mission Area, Wetland and Aquatic Research Center , Northern Prairie Wildlife Research Center

October 1, 1998

Water-quality data and methods of analysis for samples collected near a plume of sewage-contaminated ground water, Ashumet Valley, Cape Cod, Massachusetts, 1993-94 Water-quality data and methods of analysis for samples collected near a plume of sewage-contaminated ground water, Ashumet Valley, Cape Cod, Massachusetts, 1993-94

No abstract available.

Authors

Jennifer G. Savoie, Denis R. LeBlanc

Ecosystems Mission Area, Water Resources Mission Area, Environmental Health Program, Toxic Substances Hydrology, New England Water Science Center

September 25, 1998

Anaerobic oxidation of [1,2-14C]dichloroethene under Mn(IV)-reducing conditions Anaerobic oxidation of [1,2-14C]dichloroethene under Mn(IV)-reducing conditions

Anaerobic oxidation of [1,2-14C]dichloroethene to14CO2 under Mn(IV)-reducing conditions was demonstrated. The results indicate that oxidative degradation of partially chlorinated solvents like dichloroethene can be significant even under anoxic conditions and demonstrate the potential importance of Mn(IV) reduction for remediation of chlorinated groundwater contaminants.

Authors

Paul Bradley, James Landmeyer, Richard S. Dinicola

Water Resources Mission Area, Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program, South Atlantic Water Science Center (SAWSC), Washington Water Science Center

September 16, 1998

Factors influencing cattail abundance in the northern Everglades Factors influencing cattail abundance in the northern Everglades

Since the early 1900s, the Everglades have been influenced by anthropogenic actions including altered hydrology and increased nutrient loading. In the northern Everglades an apparent effect of these disturbances has been the development and proliferation of dense cattail (Typha spp. ) stands in areas previously dominated by sawgrass (Cladium jamaicense Crantz) and sloughs. Cattail cover...

Authors

S. Newman, J. Schuette, James B. Grace, K. Rutchey, T. Fontaine, K.R. Reddy, M. Pietrucha

Ecosystems Mission Area, Wetland and Aquatic Research Center

September 1, 1998

Recommended changes in common fish names: pikeminnow to replace squawfish (Ptychocheilus spp.) Recommended changes in common fish names: pikeminnow to replace squawfish (Ptychocheilus spp.)

No abstract available.

Authors

Joseph S. Nelson, Edwin J. Crossman, Hector Espinosa-Perez, Carter R. Gilbert, Robert N. Lea, James D. Williams

Ecosystems Mission Area, Wetland and Aquatic Research Center

August 14, 1998

Total phosphorus and total nitrogen mass balances for Lago de Cidra Total phosphorus and total nitrogen mass balances for Lago de Cidra

No abstract available.

Authors

Orlando Ramos-Gines

Water Resources Mission Area, Caribbean-Florida Water Science Center (CFWSC)

August 13, 1998

Water budgets of forested and agriculturally-developed watershed in Puerto Rico Water budgets of forested and agriculturally-developed watershed in Puerto Rico

No abstract available.

Authors

Matthew C. Larsen, I.M. Concepcion

Water Resources Mission Area, Caribbean-Florida Water Science Center (CFWSC)

August 1, 1998

Detection of conduit-controlled ground- water flow at selected sites in northwestern Puerto Rico Detection of conduit-controlled ground- water flow at selected sites in northwestern Puerto Rico

No abstract available.

Authors

Jesus Rodriguez-Martinez, R.T. Richards

Water Resources Mission Area, Caribbean-Florida Water Science Center (CFWSC)

August 1, 1998

Technical protocol for evaluating natural attenuation of chlorinated solvents in ground water Technical protocol for evaluating natural attenuation of chlorinated solvents in ground water

This Protocol is designed to evaluate the fate in ground water of chlorinated aliphatic hydrocarbons and/or fuel hydrocarbons. Documentation of natural attenuation requires detailed site characterization. The data collected under this protocol can be used to compare the relative effectiveness of other remedial options. and natural attenuation. This protocol should be used to evaluate...

Authors

T.H. Wiedemeier, M.A. Swanson, D.E. Moutoux, E.K. Gordon, J.T. Wilson, B.H. Wilson, D.H. Kampbell, P.E. Haas, R.N. Miller, J.E. Hansen, Francis H. Chapelle

Water Resources Mission Area, Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program, South Atlantic Water Science Center (SAWSC)