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Layer: LakesPonds (ID: 6)

View In:   ArcGIS Online Map Viewer

Parent Layer: NH_WAP_AquaticHabitat

Name: LakesPonds

Display Field: gnis_name

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: We developed a mapped classification of lakes and ponds based on variables that structure lacustrine natural communities and that could be mapped consistently across Northeastern US. The classification was built upon four key attributes: water temperature, trophic state, alkalinity, and depth. Water temperature was mapped into three classes (very cold, cold, and warm-cool) to reflect the requirements and limits of aquatic organisms. Trophic states, representing the productivity of a lake, were mapped into two classes (oligomesotrophic -mesotrophic and eutrophic- hypereutrophic). Alkalinity was grouped into three classes (high, medium, low) to reflect how well the lake system was buffered from acidification. Depth was divided into two classes (lake, pond) based on a light penetration zone, using maximum depth and trophic state as a proxy for this zone. A steering committee of state and regional experts contributed sampled data with measured values of these and other variables for waterbodies in their states. To create the mapped classification, we compiled the location of every waterbody in the region (n = 36, 675) , and for each waterbody we generatedover 300 descriptive attributes including: morphology, dams, climate, soils, geology, conservation lands, landforms, and land cover in the buffer zone or watershed. We used Random Forest software to develop a predictive model for each classification variable class based on the sampled data points and the descriptive attribute variables, and we then extrapolated the model to the unsampled waterbodies to estimate their class. After estimating each variable class, all waterbodies were assigned to one of 18 classification types based on the combination of 3 variables, temperature + trophic + alkalinity class. These types can be further subdivided into lake or pond categories to yield mapped occurrences, for example: cold, oligo-mesotrophic, low alkalinity, lake. The 18 primary lake and pond types are described in the addition to the “Northeast Terrestrial and Aquatic Habitat Guide”, December 2015.

Service Item Id: d133bd696e3d447ca5208ea80339313d

Copyright Text: The Nature Conservancy reserves all rights in data provided. All data are provided as is. This is not a survey quality dataset. The Nature Conservancy makes no warranty as to the currency, completeness, accuracy or utility of any specific data. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. Updated March 2020, NH Fish and Game Department.

Default Visibility: false

MaxRecordCount: 2000

MaxSelectionCount: 0

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0.0

Max Scale: 0.0

Effective Min Scale: 500000

Supports Advanced Queries: true

Supports Statistics: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports ValidateSQL: true

Supports Calculate: true

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

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: nhlakeclass

Fields: Types:
Capabilities: Query,Extract

Sync Can Return Changes: true

Is Data Versioned: false

Supports Rollback On Failure: true

Supports ApplyEdits With Global Ids: false

Supports ApplyEdits By Upload Id: true

Supports Query With Historic Moment: false

Supports Coordinates Quantization: true

Child Resources:

Supported Operations:   Query   Query Attachments   Query Analytic   Query Top Features   Query Bins   Append   Validate SQL   Generate Renderer   Return Updates   Metadata   Update Metadata