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Layer: Ecological Drainage Units (EDU) (ID: 0)

Name: Ecological Drainage Units (EDU)

Display Field: EDU

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This data was created as part of the Missouri Aquatic Gap Project. Ecological Drainage Units (EDUs) are largely zoogeographic substrata of Subregions. EDUs were empirically derived and represent fairly large watersheds or subdrainages (approx 2,500-10,000 mi²) containing aquatic assemblages that are relatively distinct within the context of the surrounding Subregion. Our EDUs are quite similar to the faunal divisions of Pflieger's Aquatic Community Classification for Missouri (Pflieger 1989). We decided not to simply adopt these faunal divisions for two important reasons. First, Pflieger utilized 1,608 community fish samples to generate the constancy/fidelity indices he used to delineate his faunal divisions. We had at our disposal those same 1,608 samples plus nearly 1,000 additional samples. Second, we had assembled 1,000's of collection records for 3 other taxa (crayfish, mussels, and snails) that we believed should be included in any effort to delineate zoogeographic subunits of our three Aquatic Subregions.

Service Item Id: e3a655273c564eab844eb87b2deb0397

Copyright Text:

Default Visibility: true

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 100000.0

Max Scale: 1200.0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:
Drawing Info: Advanced Query Capabilities:
HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:
Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

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