Dataset Identification:
Resource Abstract:
- description: This study was conducted by U.S. Fish and Wildlife Service biologists during 1991. The study goals were to monitor
water quality and concentrations of metals and metalloids in stream sediments and fish, and to evaluate existing and potential
impacts of metal contamination and water quality degradation on refuge fish and wildlife. Stream sediment, water, and fish
samples were collected from 12 sites: four sites on Northern Innoko National Wildlife Refuge, two south of the Northern Innoko
National Wildlife Refuge, two north of the Koyukuk National Wildlife Refuge, and four on the Nowitna National Wildlife Refuge.
Mineral deposits of many types have been located around the three refuges. These include antimony, arsenic, bismuth, copper,
lead, gold, molybdenum, nickel, silver, tin, thorium, tungsten, uranium, and zinc. Extraction of these resources could affect
fish and wildlife resources of the refuges, downstream of these deposits. Placer mining for gold has occurred in many of the
major and minor drainages that enter the refuges. In general, concentrations of beryllium, cadmium, lead, and mercury in sediment
samples were characteristic of uncontaminated sediments. Mercury concentrations in sediment were all <0.14 mg/kg. Mean
concentrations of cadmium and lead in sediment samples were greatest on Koyukuk Refuge, and mean concentrations of copper,
manganese, nickel, and zinc were greatest on Northern lnnoko Refuge. Concentrations of beryllium, cadmium, copper, lead, manganese,
and nickel were lowest in sediment samples from the Nowitna Refuge.; abstract: This study was conducted by U.S. Fish and Wildlife
Service biologists during 1991. The study goals were to monitor water quality and concentrations of metals and metalloids
in stream sediments and fish, and to evaluate existing and potential impacts of metal contamination and water quality degradation
on refuge fish and wildlife. Stream sediment, water, and fish samples were collected from 12 sites: four sites on Northern
Innoko National Wildlife Refuge, two south of the Northern Innoko National Wildlife Refuge, two north of the Koyukuk National
Wildlife Refuge, and four on the Nowitna National Wildlife Refuge. Mineral deposits of many types have been located around
the three refuges. These include antimony, arsenic, bismuth, copper, lead, gold, molybdenum, nickel, silver, tin, thorium,
tungsten, uranium, and zinc. Extraction of these resources could affect fish and wildlife resources of the refuges, downstream
of these deposits. Placer mining for gold has occurred in many of the major and minor drainages that enter the refuges. In
general, concentrations of beryllium, cadmium, lead, and mercury in sediment samples were characteristic of uncontaminated
sediments. Mercury concentrations in sediment were all <0.14 mg/kg. Mean concentrations of cadmium and lead in sediment
samples were greatest on Koyukuk Refuge, and mean concentrations of copper, manganese, nickel, and zinc were greatest on Northern
lnnoko Refuge. Concentrations of beryllium, cadmium, copper, lead, manganese, and nickel were lowest in sediment samples from
the Nowitna Refuge.
Citation
- Title Technical report: Water quality and metal and metalloid contaminants in sediments, and fish of Koyukuk, Nowitna, and the Northern
Unit of Innoko National Wildlife Refuges, Alaska, 1991.
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- creation Date
2018-05-21T02:18:18.320942
Resource language:
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Metadata data stamp:
2018-08-07T00:33:24Z
Resource Maintenance Information
- maintenance or update frequency:
- notes: This metadata record was generated by an xslt transformation from a dc metadata record; Transform by Stephen M. Richard, based
on a transform by Damian Ulbricht. Run on 2018-08-07T00:33:24Z
Metadata contact
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pointOfContact
- organisation Name
CINERGI Metadata catalog
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- Contact information
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- Address
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- electronic Mail Address cinergi@sdsc.edu
Metadata language
eng
Metadata character set encoding:
utf8
Metadata standard for this record:
ISO 19139 Geographic Information - Metadata - Implementation Specification
standard version:
2007
Metadata record identifier:
urn:dciso:metadataabout:9473b78f-ffef-459b-8f69-198f092423a0
Metadata record format is ISO19139 XML (MD_Metadata)