Northern California DPU Steelhead Critical Habitat

The Northern California Distinct Population Unit (DPU) of Steelhead Trout ( Oncorhynchus mykiss) is a threatened species. This distinct population segment, or DPS, includes naturally spawned anadromous steelhead (Oncorhynchus mykiss) originating below natural and manmade impassable barriers in California coastal river basins from Redwood Creek to and including the Gualala River. Steelhead trout are vulnerable to many stressors and threats including blocked access to spawning grounds and habitat degradation caused by dams and culverts. The specific areas designated in the rule include approximately 8,935 net mi (14,269 km) of riverine habitat. It is found only in the Northern Region of California.

Critical habitat is the specific area within the geographic range of the species, occupied by the species at the time it was listed, that contain the physical or biological features that are essential to the conservation of endangered and threatened species and that may need special management or protection. Critical habitat may also include areas that were not occupied by the species at the time of listing but are essential to its conservation.

Critical habitat designations affect only Federal agency actions or federally funded or permitted activities. Critical habitat designations do not affect activities by private landowners if there is no Federal "nexus"'€”that is, no Federal funding or authorization. Federal agencies are required to avoid "destruction" or "adverse modification" of designated critical habitat. The ESA requires the designation of "critical habitat" for listed species when "prudent and determinable."

Data and Resources

Additional Info

Field Value
Last Updated January 17, 2025, 06:42 (UTC)
Created January 17, 2025, 06:42 (UTC)
category /Biodiversity Conservation/Focal Species/Fish
collection_name California Landscape Metrics
creation_method The National Marine Fisheries Service proposed a critical habitat designation, publishing it in the Federal Register and requesting public comments. Final designation of critical habitat is based on the best scientific data available, after taking into consideration the probable economic and other impacts of the designation. After reviewing the comments, the National Marine Fisheries Service responded to them and published a rule, including final boundaries, in the Federal Register.
data_units Binary; 0 = not critical habitat, 1 = designated critical habitat.
data_vintage 09/2005
encoding utf8
file_name SteelheadCriticalHab_200509_202401_T2_v5
format GeoTiff
harvest_object_id a6a3d6a8-69c7-4103-82ed-2b298c6370ba
harvest_source_id a2637971-af12-457f-ae4a-831d2202a539
harvest_source_title WIFIRE Commons
maximum_value 1.0
metric_definition_and_relevance The Northern California Distinct Population Unit (DPU) of Steelhead Trout ( _Oncorhynchus mykiss)_ is a threatened species. This distinct population segment, or DPS, includes naturally spawned anadromous steelhead _(Oncorhynchus mykiss)_ originating below natural and manmade impassable barriers in California coastal river basins from Redwood Creek to and including the Gualala River. Steelhead trout are vulnerable to many stressors and threats including blocked access to spawning grounds and habitat degradation caused by dams and culverts. The specific areas designated in the rule include approximately 8,935 net mi (14,269 km) of riverine habitat. It is found only in the Northern Region of California. Critical habitat is the specific area within the geographic range of the species, occupied by the species at the time it was listed, that contain the physical or biological features that are essential to the conservation of endangered and threatened species and that may need special management or protection. Critical habitat may also include areas that were not occupied by the species at the time of listing but are essential to its conservation. Critical habitat designations affect only Federal agency actions or federally funded or permitted activities. Critical habitat designations do not affect activities by private landowners if there is no Federal "nexus"'€”that is, no Federal funding or authorization. Federal agencies are required to avoid "destruction" or "adverse modification" of designated critical habitat. The ESA requires the designation of "critical habitat" for listed species when "prudent and determinable."
minimum_value 0.0
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tier 2