| Data Set Citation |
Gehrts K.
2008.
POD! Environmental Monitoring Program (IEP) benthic macroinvertebrate data.
KNB Data Registry:
urn:lsid:knb.ecoinformatics.org:nceas:897:7
(http://knb.ecoinformatics.org/knb/metacat/nceas.897.7/nceas).
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| Data Tables, Images, and Other Entities: |
| Data Table: | D28A-L 1977 to present.xls
(View Metadata
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Download File )
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| Data Table: | D4-L 1975 to present.xls
(View Metadata
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Download File )
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| Data Table: | D7-C 1977 to present.xls
(View Metadata
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Download File )
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| Offline Distribution Info: |
| Medium: | digital |
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| Data Set Owner(s): |
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Organization: | NCEAS 12192: Fleishman: Ecosystem analysis of pelagic organism declines in the Upper San Francisco Estuary |
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Organization: | National Center for Ecological Analysis and Synthesis |
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Individual: | Karen Gehrts |
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Organization: | California Department of Water Resources (DWR) |
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Email Address:
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| Metadata Provider(s): |
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Individual: | Marissa Bauer |
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Role:
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| Abstract: |
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| These files have count data for benthic macroinvertebrates collected in each sample for the three longest running stations of IEP's Ecological Monitoring Program. Convert to density (org/m2): multiply by 19 (size of ponar is .053m2 and mesh size is .595mm). |
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| License and Usage Rights: |
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| Obtain permission from data set owner(s) |
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| Geographic Coverage: |
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Geographic Description: | Sacramento-San Joaquin Delta and Suisun Bay, California, USA |
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Bounding Coordinates:
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| West: | -121.7997 degrees
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| East: | -121.7997 degrees
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| North: | 38.0331 degrees
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| South: | 38.0331 degrees
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| Temporal Coverage: |
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End:
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| Access Control: |
| Auth System: | knb |
| Order: | denyFirst |
| Access Rules: |
ALLOW:
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[all]
| uid=nceasadmin,o=NCEAS,dc=ecoinformatics,dc=org
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ALLOW:
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[all]
| uid=mbauer,o=NCEAS,dc=ecoinformatics,dc=org
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ALLOW:
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| Contact: |
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Individual: | Karen Gehrts |
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Organization: | California Department of Water Resources (DWR) |
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Email Address:
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| Methods Info: |
| Step 1: |
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Description:
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All samples are collected using a hydraulic winch and Ponar dredge. The Ponar dredge samples a bottom area of about 0.053 m2 to a depth that varies with the type of sediment and the ability of the dredge to penetrate it. Under the current program four replicate sample grabs are collected at each sampling site. The contents of the dredge are brought to the surface and placed in a large plastic bucket. Water is then added to the sample to create a slurry. The contents of each grab sample bucket are washed over Standard No. 30 stainless steel mesh screen (0.595 mm openings). Each sample is carefully washed with a fine spray to remove as much of the substrate as possible. All material remaining on the screen after washing is preserved in a solution of approximately 20%26#37; buffered formalin containing Rose Bengal dye for laboratory analysis.
The benthic macroinvertebrate sampling methodology used in this program is described in Standard Methods for the Examination of Water And Wastewater, 20th ed. 1998 American Public Health Association, Washington D.C. (See pages 10-60 through 10-74.)
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