Ecoregions of Alaska and Neighboring Territory

Table of Contents



IDENTIFICATION_INFORMATION

Citation: Citation_Information: Originator: Greg Nowacki Originator: Page Spencer Originator: Terry Brock Originator: Michael Fleming Originator: Torre Jorgenson Publication_Date: 2001 Title: Ecoregions of Alaska and Neighboring Territory Edition: Geospatial_Data_Presentation_Form: Map Publication_Information: Publication_Place: Reston, Va Publisher: USGS Other_Citation_Details: Online_Linkage: HTTP://agdc.usgs.gov/data/projects/fhm/ Larger_Work_Citation: Citation_Information: Originator: Publication_Date: Title: Publication_Information: Publication_Place: Publisher: Online_Linkage: Description: Abstract: Major ecosystems have been mapped and described for the State of Alaska and nearby areas. Ecoregion units are based on newly available datasets and field experience of ecologists, biologists, geologists and regional experts. Recently derived datasets for Alaska included climate parameters, vegetation, surficial geology and topography. Additional datasets incorporated in the mapping process were lithology, soils, permafrost, hydrography, fire regime and glaciation. Thirty two units are mapped using a combination of the approaches of Bailey (hierarchial), and Omernick (integrated). The ecoregions are grouped into two higher levels using a "tri-archy" based on climate parameters, vegetation response and disturbance processes. The ecoregions are described with text, photos and tables on the published map. Purpose: This ecoregions map has been created to incorporate recent datasets and an interagency approach to mapping and managing Alaska's lands and resources. It combines the expertise and approach incorporated in ecosystem mapping efforts in the early 1990's (Gallant et al, 1995, Nowacki and Brock, 1995). It provides an ecological foundation for studying, managing and understanding the ecosystems of Alaska and their driving processes. Supplemental_Information: The Ecoregion units are arranged in two higher levels along gradients of climate, vegetation and disturbance processes. Thirty two ecoregions fit into eight groups at Level 2, and three regimes at Level 1 (Boreal, Maritime and Polar). Please refer to the tri-archy found on the back of the published map. Written descriptions are located in the section of Overview Description, following the individual ecoregional descriptions. Level 1 Level 2 Ecoregion Polar (-like) Arctic Tundra Beaufort Coastal Plain Brooks Foothills Brooks Range Bering Tundra Kotzebue Sound Lowlands Seward Peninsula Bering Sea Islands Boreal (-like) Bering Taiga Nulato Hills Yukon-Kuskokwim Delta Ahklun Mountains Bristol Bay Lowlands Intermontane Boreal Kobuk Ridges and Valleys Ray Mountains Davidson Mountains Yukon-Old Crow Basin North Ogilvie Mountains Yukon-Tanana Uplands Tanana-Kuskokwim Lowlands Yukon River Lowlands Kuskokwim Mountains Alaska Range Transition Lime Hills Alaska Range Cook Inlet Basin Copper River Basin Maritime (-like) Aleutian Meadows Alaska Peninsula Aleutian Islands Coastal Rainforests Alexander Archipelago Boundary Ranges Chugach-St. Elias Mountains Gulf of Alaska Coast Kodiak Island Coast Mountains Transition Wrangell Mountains Kluane Range Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: Ending_Date: Currentness_Reference: Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: 166.5500 East_Bounding_Coordinate: -127.8092 North_Bounding_Coordinate: 71.3910 South_Bounding_Coordinate: 48.1320 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Ecoregions Theme_Keyword: Alaska Theme_Keyword: Ecosystems Theme_Keyword: Ahklun Mountains Theme_Keyword: Alaska Peninsula Theme_Keyword: Alaska Range Theme_Keyword: Aleutian Islands Theme_Keyword: Alexander Archipelago Theme_Keyword: Beaufort Coastal Plain Theme_Keyword: Bering Sea Islands Theme_Keyword: Boundary Ranges Theme_Keyword: Bristol Bay Lowlands Theme_Keyword: Brooks Foothills Theme_Keyword: Brooks Range Theme_Keyword: Chugach-St. Elias Mountains Theme_Keyword: Cook Inlet Basin Theme_Keyword: Copper River Basin Theme_Keyword: Davidson Mountains Theme_Keyword: Gulf of Alaska Coast Theme_Keyword: Kluane Range Theme_Keyword: Kobuk Ridges and Valleys Theme_Keyword: Kodiak Island Theme_Keyword: Kotzebue Sound Lowlands Theme_Keyword: Kuskokwim Mountains Theme_Keyword: Lime Hills Theme_Keyword: North Ogilvie Mountains Theme_Keyword: Nulato Hills Theme_Keyword: Ray Mountains Theme_Keyword: Seward Peninsula Theme_Keyword: Tanana-Kuskokwim Lowlands Theme_Keyword: Wrangell Mountains Theme_Keyword: Yukon River Lowlands Theme_Keyword: Yukon-Kuskokwim Delta Theme_Keyword: Yukon-Old Crow Basin Theme_Keyword: Yukon-Tanana Uplands Place: Place_Keyword_Thesaurus: None Access_Constraints: Use_Constraints: Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Contact_Person: Greg Nowacki or Page Spencer Contact_Position: Ecologist Contact_Address: Address_Type: mailing and physical address Address: City: State_or_Province: Postal_Code: Country: Contact_Voice_Telephone: 907-586-7920 or 907-257-2625 Contact_Facsimile_Telephone: Contact_Electronic_Mail_Address: gnowacki@fs.fed.us or page_spencer@nps.gov Hours_of_Service: Native_Data_Set_Environment: ArcView version 3.2 shapefile format e:\akrestrends\commonecoregions\ecoreg52alb\akecoregions.shp Top

DATA_QUALITY_INFORMATION

Attribute_Accuracy: Attribute_Accuracy_Report: Logical_Consistency_Report: Completeness_Report: Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Greg Nowacki Originator: Page Spencer Originator: Terry Brock Originator: Michael Fleming Originator: Torre Jorgenson Publication_Date: 2001 Title: Ecoregions of Alaska and Neighboring Territory Edition: Geospatial_Data_Presentation_Form: map Publication_Information: Publication_Place: Reston, Va Publisher: U S Geological Survey Other_Citation_Details: Online_Linkage: HTTP://agdc.usgs.gov/data/projects/fhm/ Larger_Work_Citation: Citation_Information: Originator: Publication_Date: Title: Publication_Information: Publication_Place: Publisher: Online_Linkage: Source_Scale_Denominator: 2,500,000 Type_of_Source_Media: Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: Ending_Date: Source_Currentness_Reference: Source_Citation_Abbreviation: Source_Contribution: Process_Step: Process_Description: Source_Used_Citation_Abbreviation: Process_Date: Source_Produced_Citation_Abbreviation: Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Organization: Contact_Person: Contact_Position: Contact_Address: Address_Type: mailing and physical address Address: City: State_or_Province: Postal_Code: Country: Contact_Voice_Telephone: Contact_Facsimile_Telephone: Contact_Electronic_Mail_Address: Hours_of_Service: Top

SPATIAL_DATA_ORGANIZATION_INFORMATION

Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 32 Top

SPATIAL_REFERENCE_INFORMATION

Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Albers Conical Equal Area Albers_Conical_Equal_Area: Standard_Parallel: 55.000000 Standard_Parallel: 65.000000 Longitude_of_Central_Meridian: -154.000000 Latitude_of_Projection_Origin: 50.000000 False_Easting: 0.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: Coordinate pair Coordinate_Representation: Abscissa_Resolution: Ordinate_Resolution: Planar_Distance_Units: Meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Sphere Semi-major_Axis: 6370997.0000000 Denominator_of_Flattening_Ratio: Infinity Top

ENTITY_AND_ATTRIBUTE_INFORMATION

Detailed_Description: Entity_Type: Entity_Type_Label: akecoregions.dbf Entity_Type_Definition: Shapefile Attribute Table Entity_Type_Definition_Source: None Attribute: Attribute_Label: Area Attribute_Definition: Area of polygon Attribute_Definition_Source: Software generated Attribute_Domain_Values: Unrepresentable_Domain: Software computed Attribute: Attribute_Label: Perimeter Attribute_Definition: Perimeter of polygon Attribute_Definition_Source: Software generated Attribute_Domain_Values: Unrepresentable_Domain: Software computed Attribute: Attribute_Label: Commoner Attribute_Definition: Full Ecoregion name Attribute_Definition_Source: Author-defined Attribute_Domain_Values: Unrepresentable_Domain: Character Field Attribute: Attribute_Label: Count Attribute_Definition: Number of units in each ecoregion Attribute_Definition_Source: computed Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 254 Attribute: Attribute_Label: Level_1 Attribute_Definition: Full name of Level 1 regime Attribute_Definition_Source: author defined Attribute_Domain_Values: Unrepresentable_Domain: Character Field Attribute: Attribute_Label: Level_2 Attribute_Definition: Full name of Level 2 ecological group Attribute_Definition_Source: author defined Attribute_Domain_Values: Unrepresentable_Domain: Character Field Attribute: Attribute_Label: Acres Attribute_Definition: Area of each ecoregion Attribute_Definition_Source: calculated Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2.34755e+006 Range_Domain_Maximum: 3.85908e+007 Attribute: Attribute_Label: Perim_mile Attribute_Definition: Perimeter length (miles) for each ecoregion Attribute_Definition_Source: calculated Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 294.548 Range_Domain_Maximum: 11462.1 Overview_Description: Entity_and_Attribute_Overview: Entity_and_Attribute_Detail_Citation: Top

DISTRIBUTION_INFORMATION

Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: US Geological Survey Contact_Person: please use electronic mail to contact webmaster Contact_Position: Contact_Address: Address_Type: mailing and physical address Address: City: State_or_Province: Postal_Code: Country: Contact_Voice_Telephone: please use electronic mail Contact_Facsimile_Telephone: Contact_Electronic_Mail_Address: webmaster@www-eros-afo.wr.usgs.gov Hours_of_Service: Resource_Description: Ecoregions of Alaska and Neighboring Territory Distribution_Liability: Although these data have been processed successfully on a computer system at the U.S. Geological Survey, U.S. Dept of the Interior, no warranty expressed or implied is made by the Geological Survey or any of the authors regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name:ARCE Digital_Transfer_Option: Offline_Option: Offline_Media: Recording_Format: Compatibility_Information: Fees: none Ordering_Instructions: download files from AGDC website Top

METADATA_REFERENCE_INFORMATION

Metadata_Date: November, 2000 Metadata_Review_Date: Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: National Park Service Contact_Person: Page Spencer Contact_Position: Ecologist Contact_Address: Address_Type: Mailing and physical address Address: please use electronic mail City: State_or_Province: Postal_Code: Country: Contact_Voice_Telephone: Contact_Facsimile_Telephone: Contact_Electronic_Mail_Address: Page_Spencer@nps.gov Hours_of_Service: Metadata_Standard_Name: FGDC CSDGM Metadata_Standard_Version: FGDC-STD-001-1998 Top