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Service Description: Regional boundaries used in clustering analysis of flow-sensitive fish species. The regions are: 1)Central Valley & West Slope Sierra -All HUC4s flowing out of the Central Valley, including the west slope of the Sierra Nevada, the Coast Range HUC4s flowing into the valley, and the Pit River system. The San Francisco Bay and HUCs immediately draining into the Bay, as well as the legal Delta were removed from this region, as these areas have unique management considerations and are managed independently. 2) North Coast -All HUC4s flowing out the Klamath river, as well as all HUC4s from Klamath river to the north end of Monterey Bay along the west coast. 3) South Coast -All HUC4s from Monterey Bay south to the US-Mexico border along the west coast. 4) Great Basin -HUC4s flowing from the eastern Sierra/Modoc Plateau into the Great Basin north of Mono Lake. The desert region was not included in our clustering due to its depauperate native fish assemblage. Species occurring in this region are managed independently and typically on a species by species basis. Additionally, all HUC12s that did not contain flow-sensitive fish species were excluded from clustering.

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Title: Regions Used for Clustering
Author: Nick Santos, Alyssa Obester
Comments: Regional boundaries used in clustering analysis of flow-sensitive fish species. The regions are: 1)Central Valley & West Slope Sierra -All HUC4s flowing out of the Central Valley, including the west slope of the Sierra Nevada, the Coast Range HUC4s flowing into the valley, and the Pit River system. The San Francisco Bay and HUCs immediately draining into the Bay, as well as the legal Delta were removed from this region, as these areas have unique management considerations and are managed independently. 2) North Coast -All HUC4s flowing out the Klamath river, as well as all HUC4s from Klamath river to the north end of Monterey Bay along the west coast. 3) South Coast -All HUC4s from Monterey Bay south to the US-Mexico border along the west coast. 4) Great Basin -HUC4s flowing from the eastern Sierra/Modoc Plateau into the Great Basin north of Mono Lake. The desert region was not included in our clustering due to its depauperate native fish assemblage. Species occurring in this region are managed independently and typically on a species by species basis. Additionally, all HUC12s that did not contain flow-sensitive fish species were excluded from clustering.
Subject: Regional boundaries used for fish species clustering.
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Keywords: regions
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