Elkhorn Slough

Elkhorn Slough
State Important Bird Area
Aerial view of the mouth of Elkhorn Slough on Monterey Bay
Country	USA
State	California
District	Monterey County

City	Moss Landing
River	Salinas River

Coordinates	36°49′33″N 121°45′25″W / 36.8259°N 121.7569°W / 36.8259; -121.7569Coordinates: 36°49′33″N 121°45′25″W / 36.8259°N 121.7569°W / 36.8259; -121.7569

Animal	Sea otter, Santa Cruz long-toed salamander, California red-legged frog, Long-billed curlew, Savannah sparrow, Tricolored blackbird

For public	yes

Location of Elkhorn Slough in California, USA

Elkhorn Slough is a 7-mile-long (11 km)^[1]^[2] tidal slough and estuary on Monterey Bay in Monterey County, California. The community of Moss Landing and the Moss Landing Power Plant are located at the mouth of the slough on the bay.

Elkhorn Slough harbors the largest tract of tidal salt marsh in California outside of the San Francisco Bay and provides much-needed habitat for hundreds of species of plants and animals, including more than 340 species of birds.

Watershed

Carneros Creek is the primary source of freshwater flowing into Elkhorn Slough. McClusky Slough to the north and Moro Cojo Slough to the south also provide freshwater inputs.^[3]

Conservation ownership

More than 8,000 acres (3,200 ha) of the watershed's 45,000 acres (18,000 ha) are protected under a mosaic of private and public ownership.

Foundations

The nonprofit Elkhorn Slough Foundation is the single largest land owner in the watershed, with nearly 3,600 acres (1,500 ha). The nonprofit Nature Conservancy was the first to buy Elkhorn Slough property with the goal to protect the area's habitat and wildlife. The Nature Conservancy started with only 60 acres in 1971 and through gifts and purchases of disjointed parcels, gained over 800 acres (320 ha) by September 2012, when it transferred 750 acres (300 ha) to the Elkhorn Slough Foundation. The Foundation already managed conservation on these parcels.^[4]^[5]

Sea otters are found in Elkhorn Slough

Elkhorn Slough State Marine Reserve

The Elkhorn Slough State Marine Reserve (SMR) covers 1.48 square miles (3.8 km²). The SMR protects all marine life within its boundaries. It is managed by the California Department of Fish & Game (DFG) in cooperation with the National Oceanic and Atmospheric Administration. Fishing and take of all living marine resources is prohibited. It includes the waters below mean high tide within Elkhorn Slough lying:

east of longitude 121° 46.40’ W. and
south of latitude 36° 50.50’ N.

Elkhorn Slough State Marine Conservation Area

The Elkhorn Slough Elkhorn Slough State Marine Conservation Area (SMCA) covers 0.09 square miles (0.23 km²). It includes the waters below mean high tide within Elkhorn Slough:

east of the Highway 1 Bridge and
west of longitude 121° 46.40’ W.

The SMR and the SMCA were both established in September 2007 by the DFG. It was one of 29 marine protected areas adopted during the first phase of the Marine Life Protection Act Initiative, a collaborative public process to create a statewide network of marine protected areas along the California coastline.^[6]

Elkhorn Slough National Estuarine Research Reserve

The Elkhorn Slough National Estuarine Research Reserve is one of 28 National Estuarine Research Reserves established nationwide as field laboratories for scientific research and estuarine education.

Local government

Additional land protected by the Moss Landing Harbor District and the Monterey County Parks Department ^[5]

Adjacent areas

The Moss Landing Wildlife Area protects the land north and west of the Slough.

The Moro Cojo Slough State Marine Reserve just south of Elkhorn protects a similar wetland area.^[6]

Habitat and wildlife

marsh birds on Elkhorn Slough

Elkhorn Slough, one of the largest estuaries in California, provides essential habitat for over 700 species, including aquatic mammals, birds, fish, invertebrates, algae and plants. The slough area is home to California's greatest concentration of sea otters, as well as populations of endangered Santa Cruz long-toed salamander and the threatened California red-legged frog.^[5] The population of sea otter living in Elkhorn Slough reflect that the species is well-adapted for estuarine habitat, and may be a model for the historical sea otter populations now extinct in San Francisco Bay.

Elkhorn Slough hosts year-round residents tightly associated with estuaries, such as pickleweed, eelgrass, oysters, gaper clams, and longjaw mudsuckers, as well as important seasonal visitors such as migratory shorebirds, sea otters, and sharks and rays. Habitat types include mudflats, tidal creeks and channels.^[7] Other vegetative species include such wildflowers as yellow mariposa lily, Calochortus luteus.^[8]

Conservation action

In addition to preventing direct damage to the ecosystem by harvest of resources and conversion of land, conservation groups have worked to remedy indirect harm from human activity in the region.

Parson's sill

A steel weir was built in 2010 at the mouth of the Parson's Slough, a fork of the Elkhorn. The weir or "sill" is intended to reduce the excess erosion of the marsh caused by the dredging of the Moss Landing Harbor and the redirection of the Salinas River. Primary funding came from a $3.9 million federal stimulus grant.^[9] The project was a collaboration among the California Coastal Conservancy, David and Lucile Packard Foundation, DFG, Ducks Unlimited, Elkhorn Slough Foundation, NOAA, URS Corporation, and the U.S. Environmental Protection Agency ^[10]

Recreation

Along with hiking and bird watching, kayaking and stand-up paddle boarding are popular activities on the slough. Watching sea otters, sea lions, seals, brown pelicans, American avocets, cormorants, egrets, terns and a host of other wildlife from the water is an experience that provides a unique perspective of how the slough is used by the native inhabitants. People are encouraged to keep at least 100 feet of distance between them and wildlife on the slough.

The Elkhorn Slough National Estuarine Research Reserve and Elkhorn Slough Foundation provide on-site management, education, and stewardship and offer public access via 5 miles (8.0 km) of trails, as well as a Visitor Center and volunteer opportunities.

The nearby Moss Landing Wildlife Area protects 728 acres (295 ha) of salt ponds and salt marsh. Limited recreation is permitted within the Wildlife Area.^[11]

Harvest of finfish (by hook-and-line only) and clams are allowed within the conservation area only. Clams may only be taken on the north shore of the slough in the area adjacent to the Moss Landing State Wildlife Area.

California’s marine protected areas encourage recreational and educational uses of the ocean.^[12] Activities such as kayaking, diving, snorkeling, and swimming are allowed unless otherwise restricted.

The Moss Landing Harbor District has jurisdiction over the navigable waterways of Elkhorn Slough and owns Kirby Park at the upper reaches of Elkhorn Slough. Kirby park has a small boat launch and provides parking for a small trail on Nature Conservancy property at the north side. The trail here is fully handicapped-accessible and allows a walk and a wheelchair near the water's edge.^[13]

Scientific monitoring

As specified by the Marine Life Protection Act, select marine protected areas along California’s central coast are being monitored by scientists to track their effectiveness and learn more about ocean health. Similar studies in marine protected areas located off of the Santa Barbara Channel Islands have already detected gradual improvements in fish size and number.^[14]

References

↑ "U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data.". Retrieved 2011-03-15.
↑ "Elkhorn Slough National Estuarine Research Reserve (ESNERR) Final Management Plan". Retrieved 2012-07-17.
↑ Ryan Bassett (May 2010). Quantifying spatially-explicit change in sediment storage on an emerging floodplain and wetland on Carneros Creek, CA (PDF) (Thesis). California State University Monterey Bay. p. 27. Retrieved 2012-09-26.
↑ "Elkhorn Slough Foundation". Retrieved 2 February 2012.
1 2 3 Jones, Donna (2012-09-18). "Conservation groups team up to preserve Elkhorn Slough diversity". Santa Cruz Sentinel (Elkhorn Slough). pp. 1–2. Retrieved 2012-09-18.
1 2 California Department of Fish and Game. "Central Coast Marine Protected Areas". Retrieved December 23, 2008.
↑ Department of Fish and Game. "Appendix O. Regional MPA Management Plans". Master Plan for Marine Protected Areas (approved February 2008). Retrieved December 18, 2008.
↑ C. Michael Hogan. 2009. Yellow Mariposa Lily: Calochortus luteus, GlobalTwitcher.com, ed. N. Stromberg
↑ Kuchment, Olga (2009-12-27). "Underwater wall may bring balance to Elkhorn Slough". Santa Cruz Sentinel. Retrieved 2012-09-18.
↑ NOAA. "Preserving the 'Life Mud' of a California Estuary". Retrieved 2012-09-18.
↑ Department of Fish and Game. “Moss Landing Wildlife Area”. Retrieved December 23, 2008.
↑ Department of Fish and Game. "California Fish and Game Code section 2853 (b)(3)". Marine Life Protection Act. Retrieved December 18, 2008.
↑ Moss Landing Harbor District
↑ Castell, Jenn, et al. "How do patterns of abundance and size structure differ between fished and unfished waters in the Channel Islands? Results from SCUBA surveys". Partnership for Interdisciplinary Studies of Coastal Oceans (PISCO) at University of California, Santa Barbara and University of California, Santa Cruz; Channel Islands National Park. Retrieved December 18, 2008.

External links

Protected areas of California

National Park System

National Parks	Channel Islands Death Valley Joshua Tree Kings Canyon Lassen Volcanic Pinnacles Redwood Sequoia Yosemite

National Preserves	Mojave

National Monuments	Cabrillo Castle Mountains Cesar E. Chavez Devils Postpile Lava Beds Muir Woods World War II Valor in the Pacific

National Seashores	Point Reyes

National Historical Parks	Rosie the Riveter/World War II Home Front San Francisco Maritime

National Historic Sites	Eugene O'Neill Fort Point John Muir Manzanar

National Memorials	Port Chicago Naval Magazine

National Recreation Areas	Golden Gate Santa Monica Mountains Whiskeytown

State Parks

State Parks	Ahjumawi Lava Springs Andrew Molera Angel Island Annadel Año Nuevo Anza-Borrego Desert Arthur B. Ripley Desert Woodland Bidwell–Sacramento River Big Basin Redwoods Border Field Bothe-Napa Valley Burton Creek Butano Calaveras Big Trees Castle Crags Castle Rock Caswell Memorial China Camp Chino Hills Clear Lake Crystal Cove Cuyamaca Rancho D. L. Bliss Del Norte Coast Redwoods Donner Memorial Ed Z'berg Sugar Pine Point Emerald Bay The Forest of Nisene Marks Fort Ord Dunes Fremont Peak Garrapata Gaviota Great Valley Grasslands Grizzly Creek Redwoods Grover Hot Springs Hearst San Simeon Hendy Woods Henry Cowell Redwoods Henry W. Coe Humboldt Lagoons Humboldt Redwoods Jedediah Smith Redwoods Julia Pfeiffer Burns Leo Carrillo Limekiln MacKerricher Malibu Creek Manchester McArthur–Burney Falls Memorial McLaughlin Eastshore Mendocino Headlands Mendocino Woodlands Montaña de Oro Morro Bay Mount Diablo Mount San Jacinto Mount Tamalpais Navarro River Redwoods Pacheco Palomar Mountain Patrick's Point Pfeiffer Big Sur Placerita Canyon Plumas-Eureka Point Mugu Portola Redwoods Prairie Creek Redwoods Red Rock Canyon Richardson Grove Rio de Los Angeles Robert Louis Stevenson Russian Gulch Saddleback Butte Salt Point Samuel P. Taylor San Bruno Mountain Sinkyone Wilderness South Yuba River Sugarloaf Ridge Sutter Buttes Tolowa Dunes Tomales Bay Topanga Van Damme Washoe Meadows Wilder Ranch

State Natural Reserves	Antelope Valley California Poppy Armstrong Redwoods Azalea Caspar Headlands John B. Dewitt John Little Jug Handle Kruse Rhododendron Los Osos Oaks Mailliard Redwoods Mono Lake Tufa Montgomery Woods Point Lobos Smithe Redwoods Torrey Pines Tule Elk

State Marine Reserves	Albany Emeryville Crescent

State Historic Parks	Anderson Marsh Antelope Valley Indian Museum Bale Grist Mill Benicia Capitol Bidwell Mansion Bodie California Citrus California State Indian Museum Chumash Painted Cave Colonel Allensworth Columbia Cowell Ranch/John Marsh El Presidio de Santa Barbara Empire Mine Folsom Powerhouse Fort Humboldt Fort Ross Fort Tejon Governor's Mansion Hearst San Simeon Indian Grinding Rock Jack London La Purísima Mission Leland Stanford Mansion Los Angeles Los Encinos Malakoff Diggins Marconi Conference Center Marshall Gold Discovery Monterey Old Sacramento Old Town San Diego Olompali Petaluma Adobe Pigeon Point Light Station Pío Pico Point Sur Railtown 1897 San Juan Bautista San Pasqual Battlefield Santa Cruz Mission Santa Susana Pass Shasta Sonoma Sutter's Fort Tomo-Kahni Wassama Round House Watts Towers of Simon Rodia Weaverville Joss House Will Rogers William B. Ide Adobe Woodland Opera House

State Beaches	Asilomar Bean Hollow Bolsa Chica Cardiff Carlsbad Carmel River Carpinteria Caspar Headlands Cayucos Corona del Mar Dockweiler Doheny El Capitán Emma Wood Gray Whale Cove Greenwood Half Moon Bay Huntington Leucadia Lighthouse Field Little River Malibu Lagoon Mandalay Manresa Marina McGrath Montara Monterey Moonlight Morro Strand Moss Landing Natural Bridges New Brighton Pacifica Pelican Pescadero Pismo Point Dume Point Sal Pomponio Refugio Robert H. Meyer Memorial Robert W. Crown Memorial Salinas River San Buenaventura San Clemente San Elijo San Gregorio San Onofre Santa Monica Schooner Gulch Seacliff Silver Strand Sonoma Coast South Carlsbad Sunset Thornton Torrey Pines Trinidad Twin Lakes Westport-Union Landing Will Rogers William Randolph Hearst Memorial Zmudowski

State Recreation Areas	Admiral William Standley Auburn Austin Creek Benbow Lake Benicia Bethany Reservoir Brannan Island Candlestick Point Castaic Lake Colusa-Sacramento River Folsom Lake Franks Tract George J. Hatfield Harry A. Merlo Kenneth Hahn Kings Beach Lake Del Valle Lake Oroville Lake Perris Lake Valley Martial Cottle Park McConnell Millerton Lake Picacho Providence Mountains Salton Sea San Luis Reservoir Silverwood Lake Standish-Hickey Tahoe Turlock Lake Woodson Bridge

State Vehicular Recreation Areas	Carnegie Clay Pit Heber Dunes Hollister Hills Hungry Valley Oceano Dunes Ocotillo Wells Prairie City

Other	Burleigh H. Murray Ranch California State Mining and Mineral Museum California State Capitol Museum California State Railroad Museum Castro Adobe Delta Meadows Estero Bay Hatton Canyon Indio Hills Palms Point Cabrillo Light Station Point Lobos Ranch Point Montara Light Station Reynolds Wayside Campground San Timoteo Canyon Stone Lake Verdugo Mountains Ward Creek Wildwood Canyon

National Forests and Grasslands

National Forests and Grasslands	Angeles Butte Valley NG Cleveland Eldorado Humboldt-Toiyabe Inyo Klamath Lake Tahoe Basin Lassen Los Padres Mendocino Modoc Plumas Rogue River – Siskiyou San Bernardino Sequoia Shasta–Trinity Sierra Six Rivers Stanislaus Tahoe

National Wilderness Preservation System	Agua Tibia Ansel Adams Bucks Lake Caribou Carson-Iceberg Castle Crags Cucamonga Desolation Dick Smith Dinkey Lakes Emigrant Golden Trout Hoover Inyo Mountains Ishi Jennie Lakes John Muir Kaiser Marble Mountain Mokelumne Mount Shasta Wilderness North Fork San Gabriel Sanhedrin San Jacinto San Rafael Sespe Siskiyou Snow Mountain South Fork Eel River South Sierra South Warner Thousand Lakes Trinity Alps Ventana Yolla Bolly–Middle Eel Yuki

National Monuments and Recreation Areas	Giant Sequoia National Monument San Gabriel Mountains National Monument Santa Rosa and San Jacinto Mountains National Monument Smith River National Recreation Area Shasta–Trinity National Recreation Area Sand to Snow National Monument

State Forests

Boggs Mountain Demonstration Ellen Pickett Jackson Demonstration Las Posadas LaTour Demonstration Mount Zion Mountain Home Demonstration Soquel Demonstration

National Wildlife Refuges

State Wildlife Areas

Wildlife Areas	Antelope Valley Ash Creek Bass Hill Battle Creek Big Lagoon Big Sandy Biscar Butte Valley Buttermilk Country Cache Creek Camp Cady Cantara/Ney Springs Cedar Roughs Cinder Flats Collins Eddy Colusa Bypass Coon Hollow Cottonwood Creek Crescent City Marsh Crocker Meadows Daugherty Hill Decker Island Doyle Dutch Flat Eastlker River Eel River Elk Creek Wetlands Elk River Fay Slough Feather River Fitzhugh Creek Fremont Weir Grass Lake Gray Lodge Green Creek Grizzly Island Hallelujah Junction Heenan Lake Hill Slough Hollenbeck Canyon Honey Lake Hope Valley Horseshoe Ranch Imperial Indian Valley Kelso Peak and Old Dad Mountains Kinsman Flat Knoxville Laguna Lake Berryessa Lake Earl Lake Sonoma Little Panoche Reservoir Los Banos Lower Sherman Island Mad River Slough Marble Mountains Mendota Merrill's Landing Miner Slough Monache Meadows Morro Bay Moss Landing Mouth of Cottonwood Creek Napa-Sonoma Marshes North Grasslands O'Neill Forebay Oroville Petaluma Marsh Pickel Meadow Pine Creek Point Edith Putah Creek Rector Reservoir Red Lake Rhode Island Sacramento River San Felipe Valley San Jacinto San Luis Obispo San Luis Reservoir San Pablo Bay Santa Rosa Shasta Valley Silver Creek Slinkard/Little Antelope Smithneck Creek South Fork Spenceville Surprise Valley Sutter Bypass Tehama Truckee River Upper Butte Basin Volta Warner Valley Waukell Creek West Hilmar Westlker River White Slough Willow Creek Yolo Bypass

Ecological Reserves	Albany Mudflats Alkali Sink Allensworth Atascadero Creek Marsh Bair Island Baldwin Lake Batiquitos Lagoon Blue Sky Boden Canyon Boggs Lake Bolsa Chica Bonny Doon Buena Vista Lagoon Butler Slough Butte Creek Canyon Butte Creek House Buttonwillow By Day Creek Calhoun Cut Canebrake Carlsbad Highlands Carmel Bay Carrizo Canyon Carrizo Plains China Point Clover Creek Coachella Valley Coal Canyon Corte Madera Marsh Crestridge Dairy Mart Ponds Dales Lake Del Mar Landing Eden Landing Elkhorn Slough Estelle Mountain Fall River Mills Fish Slough Fremont Valley Goleta Slough Indian Joe Spring Kaweah Kerman King Clone Laguna Laurel Loch Lomond Vernal Pool Lokern Magnesia Spring Marin Islands Mattole River McGinty Mountain Morro Dunes Morro Rock Napa River North Table Mountain Oasis Spring Panoche Hills Peytonia Slough Pine Hill Piute Creek Pleasant Valley Rancho Jamul Redwood Shores River Springs Lakes Saline Valley San Dieguito Lagoon San Elijo Lagoon San Felipe Creek San Joaquin River Santa Rosa Plateau Springville Stone Corral Sycamore Canyon Sycuan Peak Thomes Creek Tomales Bay Upper Newport Bay Watsonville Slough West Mojave Desert Woodbridge Yaudanchi

Marine Protected Areas	Abalone Cove Albany Mudflats Anacapa Anacapa Año Nuevo Asilomar Atascadero Beach Bair Island Batiquitos Lagoon Big Creek Big Creek Big Sycamore Canyon Bodega Bolsa Chica Cambria Cardiff and San Elijo Carmel Bay Carmel Pinnacles Carrington Point Catalina Marine Science Center Corte Madera Marsh Crystal Cove Dana Point Del Mar Landing Doheny Doheny Duxbury Reef Edward F. Ricketts Elkhorn Slough Elkhorn Slough Encinitas Estero de Limantour Fagan Marsh Farallon Islands Farnsworth Bank Fort Ross Gerstle Cove Goleta Slough Greyhound Rock Gull Island Harris Point Heisler Park Hopkins Irvine Coast James V. Fitzgerald Judith Rock Julia Pfeiffer Burns La Jolla Laguna Beach Lovers Cove (Catalina Island) Lovers Point MacKerricher Manchester and Arena Rock Marin Islands Mia J. Tegner Moro Cojo Slough Morro Bay Morro Bay Morro Beach Natural Bridges Niguel Pacific Grove Marine Gardens Painted Cave Peytonia Slough Piedras Blancas Piedras Blancas Pismo Pismo-Oceano Beach Point Buchon Point Buchon Point Cabrillo Point Fermin Point Lobos Point Reyes Headlands Point Sur Point Sur Portuguese Ledge Punta Gorda Redwood Shores Refugio Richardson Rock Robert E. Badham Robert W. Crown Russian Gulch Russian River Salt Point San Diego-Scripps San Dieguito Lagoon San Elijo Lagoon Santa Barbara Island Scorpion Skunk Point Sonoma Coast Soquel Canyon South Laguna Beach South Point Swami’s Tomales Bay Upper Newport Bay Van Damme Vandenberg White Rock (Cambria)

Bureau of Land Management National Landscape Conservation System

National Monuments	Berryessa Snow Mountain California Coastal Carrizo Plain Fort Ord Mojave Trails Sand to Snow Santa Rosa and San Jacinto Mountains

National Conservation Areas	California Desert King Range

Wilderness Areas	Argus Range Big Maria Mountains Bigelow Cholla Garden Bighorn Mountain Black Mountain Bright Star Bristol Mountains Cadiz Dunes Carrizo Gorge Chemehuevi Mountains Chimney Peak Chuckwalla Mountains Chumash Cleghorn Lakes Clipper Mountain Coso Range Coyote Mountains Darwin Falls Dead Mountains Dick Smith El Paso Mountains Fish Creek Mountains Funeral Mountains Golden Valley Grass Valley Headwaters Forest Reserve Hollow Hills Ibex Indian Pass Inyo Mountains Jacumba Kelso Dunes Kiavah Kingston Range Little Chuckwalla Mountains Little Picacho Machesna Mountain Matilija Malpais Mesa Manly Peak Mecca Hills Mesquite Newberry Mountains Nopah Range North Algodones Dunes North Mesquite Mountains Old Woman Mountains Orocopia Mountains Otay Mountain Owens Peak Pahrump Valley Palen/McCoy Palo Verde Mountains Picacho Peak Piper Mountain Piute Mountains Red Buttes Resting Spring Range Rice Valley Riverside Mountains Rodman Mountains Sacatar Trail Saddle Peak Hills San Gorgonio Santa Lucia Santa Rosa Sawtooth Mountains Sespe Sheephole Valley South Nopah Range Stateline Stepladder Mountains Surprise Canyon Sylvania Mountains Trilobite Turtle Mountains Whipple Mountains

National Marine Sanctuaries

Channel Islands Cordell Bank Greater Farallones Monterey Bay

National Estuarine Research Reserves

Elkhorn Slough San Francisco Bay Tijuana River Estuary

University of California Natural Reserve System

Angelo Coast Range Reserve
Año Nuevo Island
Blue Oak Ranch Reserve
Bodega Marine
Box Springs
Boyd Deep Canyon Desert Research Center
Burns Piñon Ridge
Carpinteria Salt Marsh
Chickering American River
Coal Oil Point
Dawson Los Monos Canyon
Eagle Lake Field Station
Elliott Chaparral
Emerson Oaks
Fort Ord
Hastings
James San Jacinto Mountains
Jenny Pygmy Forest
Jepson Prairie
Kendall-Frost Mission Bay Marsh
Kenneth S. Norris Rancho Marino
Landels-Hill Big Creek
McLaughlin
Motte Rimrock
Quail Ridge
Sagehen Creek Field Station
San Joaquin Freshwater Marsh
Santa Cruz Island
Scripps Coastal
Sedgwick
Stebbins Cold Canyon
Steele Burnand Anza-Borrego
Stunt Ranch Santa Monica Mountains
Sweeney Granite Mountains Desert Research Center
Valentine Eastern Sierra
Younger Lagoon

Heritage registers: World Heritage Sites; World Network of Biosphere Reserves; National Register of Historic Places; National Historic Landmarks; National Natural Landmarks; California Historical Landmarks; California Points of Historical Interest; California Register of Historical Resources

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