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Shorebird_Priority_Habitat_Extract (FeatureServer)

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Service Description: This layer identifies priority areas for the conservation of shorebirds in California. It was created to assist with conservation planning in California,...

Service ItemId: 8b9aa0ba78da4f0cb200a0984f1a78c1

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Max Record Count: 2000

Supported query Formats: JSON

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This layer identifies areas of conservation priority for shorebirds in California. It divides California into ~47,000 equal-area hexes of 1000 hectares each. Each polygon has a value of 1 (priority habitat) or 0 (non-priority habitat) in the PriorityHab field. Together, all 'priority habitat' hectares are designed to conserve enough habitat to support 75% of non-breeding shorebird populations in California. Of the 3.7 million hectares identified as potential waterbird habitat in California, the 75% conservation goal targets ~2 million hectares for conservation. In particular, this layer points out the importance of agricultural lands as habitat for migrating and wintering shorebirds.

The prioritization index was calculated using the ranked habitat suitability for the following 17 shorebird species:

  • Red-necked phalarope (Phalaropus lobatus)

  • Wilson’s phalarope (P. tricolor)

  • American avocet (Recurvirostra americana)

  • Black-necked stilt (Himantopus mexicanus)

  • Short-billed dowitcher (Limnodromus griseus)

  • Long-billed dowitcher (L. scolopaceus)

  • Least sandpiper (Calidris minutilla)

  • Dunlin (C. alpina)

  • Western sandpiper (C. mauri)

  • Marbled godwit (Limosa fedoa)

  • Greater yellowlegs (Tringa melanoleuca)

  • Willet (T. semipalmata)

  • Long-billed curlew (Numenius americanus)

  • Whimbrel (N. phaeopus)

  • Black-bellied plover (Pluvialis squatarola)

  • Killdeer (Charadrius vociferus)

  • Semipalmated plover (C. semipalmatus)

Shorebird data were taken from comprehensive annual counts conducted in wetland habitats along the Pacific Flyway from 1988 to 1995 during fall, winter, and spring (Shuford et al, 1998; Page et al, 1999). For each shorebird species, experts ranked the habitats they used in order of suitability. These ranked suitabilities were used to estimate the observed shorebird densities across California. Based on the estimated relative densities of shorebirds, we used the site selection program Marxan (Possingham et al. 2000; Ball et al. 2009) to identify an efficient configuration of habitats based on the goal of conserving habitat suffiecient to support 75% of existing wintering / migratory shorebird populations.

A full description of the methods used is available in the peer-reviewed paper Stralberg et al. (2011) published in the journal 'Biodiversity and Conservation' (https://link.springer.com/article/10.1007/s10531-010-9943-5).

These maps use physical and land use characteristics to predict potential habitat suitability. Actual suitability for a location may vary depending on local conditions.



Copyright Text: Our analysis: Stralberg, D., D.R. Cameron, M.D. Reynolds, C.M. Hickey, K. Klausmeyer, S.M. Busby, L.E. Stenzel, W.D. Shuford, and G.W. Page. 2011. Identifying habitat conservation priorities and gaps for migratory shorebirds and waterfowl in California. Biodiversity and Conservation, 20(1), pp.19-40 Shorebird Data: Page, G.W., L.E. Stenzel, and J.E. Kjelmyr. 1999. Overview of shorebird abundance and distribution in wetlands of the Pacific Coast of the contiguous United States. Condor 101:461–471 Shuford, W.D., G.W. Page, and J.E. Kjelmyr. 1998. Patterns and dynamics of shorebird use of California’s Central Valley. Condor 100:227–244 Habitat Data: Farmland Monitoring and Mapping Program, California Department of Conservation Farmland Monitoring and Mapping Program accessed ???? https://www.conservation.ca.gov/dlrp/fmmp) CCM California Current Marine Ecoregional Plan, The Nature Conservancy, internal data National Wetlands Inventory, Version 2 - Surface Waters and Wetlands Inventory, U.S. Fish and Wildlife Service. ????. https://www.fws.gov/wetlands/Data/Data-Download.html National Hydrography Dataset, NHD - High Resolution, U.S. Geological Survey. ????. https://www.usgs.gov/core-science-systems/ngp/national-hydrography/national-hydrography-dataset?qt-science_support_page_related_con=0#qt-science_support_page_related_con California Central Valley Wetlands and Riparian GIS Data, California Department of Fish and Game, accessed ????. https://www.wildlife.ca.gov/Data/GIS/Clearinghouse California Central Valley Vernal Pool Habitat GIS Data, Holland, R. F., Wetlands Inventory Conservation Program, U.S. Fish and Wildlife Service, 1998. https://www.wildlife.ca.gov/Data/GIS/Clearinghouse California County Land Use Survey Data, California Department of Water Resources, accessed ????. https://water.ca.gov/Programs/Water-Use-And-Efficiency/Land-And-Water-Use/Land-Use-Surveys Marxan habitat prioritization: Possingham, H.P., I. Ball, and S. Andelman. 2000. Mathematical methods for reserve system design. In: Ferson S, Burgman M (eds) Quantitative methods for conservation biology. Springer, New York, NY Ball, I.R., H.P. Possingham, and M. Watts M. 2009 Marxan and relatives: software for spatial conservation prioritisation. In: Moilanen A, Wilson KA, Possingham HP (eds) Spatial conservation prioritisation: quantitative methods and computational tools. Oxford University Press, Oxford, UK For more information about this layer please contact: Matthew Reiter, PhD Principal Scientist - Quantitative Ecologist Point Blue Conservation Science 11912 Pine Forest Road, Truckee, CA 96161 760-417-9997 mreiter@pointblue.org

Spatial Reference: 102600 (102600)

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