In 2002, we initiated an experimental transplantation of ~500 eelgrass shoots from two large meadows at Santa Cruz Island (Smugglers, Prisoners) to Frenchy's Cove, Anacapa Island. Jessica Altstatt, Channel Islands National Marine Sanctuary, University of California Santa Barbara, Ocean Science Education Building 514, Santa Barbara, CA 93106-6155 ( Zostera pacifica) meadows were present along the northern shores of Anacapa Island prior to the late 1980s, when sea urchin over-grazing led to local extirpation. THE TRAJECTORY OF RECOVERY: POST-RESTORATION EELGRASS MEADOWS AROUND ANACAPA ISLAND AND THEIR SIMILARITY TO DONOR BEDS For the 2016 breeding season we carried out a more detailed monitoring effort that included banding, adult morphometry, chick growth, and diet composition. We confirmed CAAU breeds on Coronado, Todos Santos, San Martín, and Natividad islands, but in low numbers (5 to 29 breeding pairs). aleuticus with 70,000 to 100,000 breeding pairs. San Jerónimo supports the main breeding population of P. This subspecies productivity has varied (0.3 to 0.7 fledgling/pair) over the years, probably due to anomalous and changing climate and oceanographic conditions. australe, from 200 in 2008 to almost 2,000 in 2015 on San Roque and Asunción. We have recorded a remarkable increase of breeding pairs for P. australe on Natividad Island in 2013 as part of a long-term seabird restoration project. aleuticus on Coronado, Todos Santos, San Martín, and San Jerónimo islands, and P. australis on San Roque and Asunción islands since 2008.

To assess CAAU's recovery, we have monitored the number of breeding pairs and the productivity of P. Relevant restoration efforts have been conducted during the last 18 years on these islands, including the removal of invasive mammals and the implementation of social attraction techniques to restore breeding seabird colonies. The two recognized subspecies of Cassin’s Auklet ( Ptychoramphus aleuticus CAAU) breed on Pacific islands off the Baja California Peninsula, Mexico: P. Moctezuma 836, Zona Centro, Ensenada, Baja California, México 22800 2Conservation Science Program, Cornell Lab of Ornithology, 159 Sapsucker Woods Rd, Ithaca, NY 14850 Evaluation of weed control methods and the development of remote-site-restoration-techniques from this project has also benefited other habitat restoration projects on the Channel Islands.īREEDING POPULATIONS OF CASSIN’S AUKLET ON THE BAJA CALIFORNIA PACIFIC ISLANDS AND IMPACT OF RESTORATION ACTIONSĪlejandro Aguilar-Vargas1*, Yuliana Bedolla-Guzmán1, María Félix-Lizárraga1, Alejandra Fabila-Blanco1, Alfonso Hernández-Ríos1, Esmeralda Bravo-Hernández1, Miguel Corrales-Sauceda1, Alicia Aztorga-Ornelas1, Evaristo Mayoral-Rojas1, Alfonso Aguirre-Muñoz1, Federico Méndez-Sánchez1, and Eduardo Iñigo-Elias2, 1Grupo de Ecología y Conservación de Islas, A.C. Removal of non-native, invasive vegetation and the restoration of a native perennial Coastal Sage Scrub community on Scorpion Rock is providing better soil structure, nesting conditions, and cover for burrow- and shrub-nesting nesting seabirds, as well as new habitat for invertebrates and passerines. Native plant richness included 6 species in 2008, and reached maximum richness in 2012 (21 species). Since 2011, percent native plant cover has remained consistent at ~60% cover, with a maximum in 2013 of 66%. In 2008, vegetative cover was initially 94% invasive weeds (6 exotic species, mostly crystalline iceplant ). The removal and control of non-native vegetation and outplanting of >9,000 native plants from 2008 – 2016 has dramatically changed the landscape of Scorpion Rock. The altered vegetative cover contributed to decreased abundance and quality of nesting habitat for the burrow-nesting Cassin’s Auklet ( Ptychoramphus aleuticus australis) and crevice- and shrub-nesting Scripps’s Murrelet ( Synthliboramphus scrippsi). A legacy of human use and visitation allowed the spread of invasive, non-native plant species on Santa Cruz Island and adjacent Scorpion Rock. Scorpion Rock, located off the northeast end of Santa Cruz Island in Channel Islands National Park, is an important seabird nesting and roosting location. Invasive, non-native plant species introduced to California’s Channel Islands can affect seabird nesting habitat quality and threaten population growth and recovery. Geological Survey-Western Ecological Research Center, Santa Cruz Field Station 2Channel Islands National Park-Montrose Settlements Restoration Program 3California Institute of Environmental Studies 4Sutil Conservation Ecology 5U.S. Josh Adams1*, David Mazurkiewicz2, Andrew A. RESTORING THE NATIVE PLANT COMMUNITY ON SCORPION ROCK TO ENHANCE NESTING HABITAT FOR BURROW AND SHRUB-NESTING SEABIRDS IN THE CALIFORNIA CHANNEL ISLANDS

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