Biological Invasions of Cold-Water Coastal Ecosystems - Aquatic ...

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Chapt 9E. Museum, Reference and Voucher Specimens, page 9E- 1 Chapter 9E. Re-Examination of Museum, Reference, and Voucher Specimens Nora Foster, University of Alaska Museum, Fairbanks 9E1. Purpose As a result of environmental assessment work in Port Valdez during the 1970’s for construction of the Valdez Marine Terminal, and the Exxon Valdez oil spill (EVOS), a large ecological database exists for Prince William Sound. Through a careful scrutiny of both the species lists and specimens archived in museum, reference and voucher collections for the past work, this part of our study was intended to test the idea that this extensive prior work in Prince William Sound should have detected NIS. However, in spite of the amount of sampling done in Prince William Sound, some species lists were developed without input from taxonomic experts, so that the biota is still poorly known. Few prior surveys have focused on biogeography or taxonomy, and until this study, none has specifically looked for NIS. 9E2. Methods Literature sources for Prince William Sound invertebrates include: • Reports on marine fauna of the northeastern Gulf of Alaska, compiled as a result of the Outer Continental Shelf Environmental Assessment Project (OCSEAP);(Feder and Matheke, 1980; Feder and Jewett, 1988); • Thesis by M. Hoberg (1986); • Project reports on the Port Valdez environment (Cooney and Coyle, 1988; Feder et al., 1976; Feder and Bryson-Schwafel, 1988; Feder and Keiser, 1980; Jewett and Feder, 1977); • Eyerdam’s (1924) species lists; • Haven (1971); and • Several taxonomic references (Butler, 1980; Hart, 1982; Lambert, 1981; 1991; Behrens, 1991 and others) for additional distribution records in Alaskan waters. A vast array of preserved biological samples from Prince William Sound and adjacent Gulf of Alaska are housed in the Aquatic Collection of the University of Alaska Museum (UAM). The major part of these are collections made as part of the OCSEAP projects in the mid- 1970’s, environmental monitoring of Port Valdez, and Max Hoberg’s thesis material from three bays in the outer part of the Sound. Intertidal and benthic biota from the soft bottom communities of Prince William Sound are well represented in the collection. Species lists for this material were generated using the museum accession records. EVOS Specimen Archives The specimens collected as part environmental surveys after the 1989 Exxon Valdez oil spill supplement the UAM collection. Subtidal invertebrates in 1,154 lots have been transferred to the UAM from warehouse storage for examination. These represent sampling conducted during 1990, 1991, 1993, and 1995, from 15 selected unoiled sites. The collections provide samples of shallow subtidal fauna from silled fjords, eelgrass beds, and habitats dominated by Laminaria. With limited resources, each specimen from this large number of samples cannot be examined individually, so it has been necessary to select subset of specimens for careful reexamination.
Chapt 9E. Museum, Reference and Voucher Specimens, page 9E- 2 The subset of reference and voucher specimens examined as part of this study was selected by first compiling a list of 88 invertebrate taxa by comparing the lists of known taxa from Prince William Sound (discussed above) with lists of known NIS from west coast source ports: Puget Sound, San Francisco Bay, southern California, and other localities (see Ruiz & Hines, 1997). This compilation of 88 species includes: • species that may be confused with known NIS in Alaska; • NIS known from western North America (especially those extending to higher latitudes); • taxonomically difficult species and species complexes; • biogeographic outliers; and • range extensions. For example, polychaete specimens of most Boccardia and Polydora, were removed for reexamination because for their resemblance to Polydora ligni. Similarly, capitellid and many syllid polychaetes were selected to check for the presence of Barontolla americana, Capitella capitata, and Decamastus spp. The gastropod slipper shell Crepidula was partitioned from the collections to check for Crepidula fornicata and C. plana. Specimens of the amphipod Corophuim were selected to check for several NIS Corophium reported from Puget Sound. This original list was considered a working document and has been refined as the project has progressed (Table 9.E.1). Table 9.E.1. Museum and Reference Samples Selected for Re-Examination Family Genus Species Specimen Source Amphitoidae Amphitoe sp. Jewett samples Amphitoidae Amphitoe simulans Jewett samples Corophidae Corophium sp. Jewett samples Corophidae Corophium brevis Jewett samples Gammaridae Melita sp. UAM uncataloged Gammaridae Gammarus sp. Jewett samples Gammaridae Jassa sp. Jewett samples Gammaridae Melita dentata UAM uncataloged Cardiidae Clinocardium fucanum Jewett samples Glycymeridae Glycymeris septentrionalis Jewett samples Kelliidae Pseudopythina* compressa Jewett samples Kelliidae Pseudopythina* rugifera* Jewett samples Mytilidae Dacrydium vitreum* Jewett samples Mytilidae Dacrydium pacificum* UAM cataloged Ungulinidae Diplodonta orbella Port Valdez uncataloged Ungulinidae Diplodonta impolita UAM cataloged Adontorhina sp. Jewett samples Cryptosula okaidai Jewett samples Atyidae Haminoea virescens Little Green Island Atyidae Haminoea vesicula PWS 98 samples Atyidae Haminoea sp. Jewett samples Calyptraeidae Crepidula dorsata* Jewett samples Calyptraeidae Crepidula sp. Jewett samples Calyptraeidae Crepidula grandis Jewett samples Calyptraeidae Crepidula sp. Jewett samples Diaphanidae Diaphana minuta* Jewett samples
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page i BIOLOGICAL INVASIONS OF COLD
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page iii • Stephan Benda, Valdez
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page v • From an industry and man
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page xi microscopes for the study.
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page xiii 9C9. Echinoderms 9C9-1 9C
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