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    A brief look at the free-living Nematoda of the oxic/anoxic interface with a new genus record (Trefusia) for the Black Sea
    (Walter De Gruyter Gmbh, 2015) Urkmez, Derya; Brennan, Michael L.; Sezgin, Murat; Bat, Levent
    In order to provide the first comparative source of nematofaunal data at the oxic/anoxic interface off the Sinop Peninsula, the southern Black Sea, a survey of meiofauna and nematode fauna was conducted in August 2011 aboard the exploration vessel (E/V) Nautilus with ROV during the Black Sea Expedition NA012. Higher meiofaunal taxa and nematode composition were investigated. Free-living marine nematodes were the most abundant group at each site. A total of 84 species were found, belonging to 23 families. The suboxic zone was dominated by the nematode Trefusia aff. longicauda (42%). This is the first record of the genus Trefusia De Man, 1893 for the Black Sea. Although many factors are likely to influence the changes in the meiofaunal abundance and the composition of nematode assemblages, we suggest that oxygen reduction indeed affected the meiofaunal abundance and the nematode composition, however, a particular preference of several taxa for extreme conditions may be suggested.
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    A new species of Halaphanolaimus (Nematoda: Leptolaimidae) from the southern Black Sea (Turkey) with a modified key for species identification
    (Magnolia Press, 2013) Urkmez, Derya; Brennan, Michael L.
    Halaphanolaimus sergeevae n. sp. is described and illustrated from the Sinop coasts (southern Black Sea, Turkey). The new species morphologically resembles H. pellucidus Southern, 1914, but differs from it by having a higher number of tubular supplements (12-14 vs 6-7), longer spicules (68-70 mu m vs 47-52 mu m), smaller tail/spicule ratio (1.6 vs 2.7), smaller body size (926-1273 vs 1500 mu m), and smaller De Man indices of a, b and c'. An updated identification key to the species of Halaphanolaimus is proposed.
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    Coastal Exploration of the Southern Black Sea Off Eregli and Sinop, Turkey
    (Oceanography Soc, 2012) Brennan, Michael L.; Davis, Dan; Roman, Chris; Buynevich, Ilya V.; Catsambis, Alexis; Kofahl, Meko; Merrigon, Maureen
    [No abstract available]
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    Ocean dynamics and anthropogenic impacts along the southern Black Sea shelf examined through the preservation of pre-modern shipwrecks
    (Pergamon-Elsevier Science Ltd, 2013) Brennan, Michael L.; Davis, Dan; Roman, Chris; Buynevich, Ilya; Catsambis, Alexis; Kofahl, Meko; Urkmez, Derya
    Continued exploration of the coastal area of the southern Black Sea off Sinop and Eregli, Turkey in 2011 expanded our current understanding of the transition zone along the oxic/anoxic interface. Push cores collected with an ROV in sediments underlying the oxic, suboxic, and anoxic waters were analyzed for geochemistry, meiofauna, and microbiology to help characterize this transition zone. During the course of side-scan sonar surveys, nine shipwrecks were located in various states of preservation, all within 100-115 m depth and ranging from the 4th century B.C. to the early 20th century. Many of these wrecks have wooden components well preserved due to the influences of anoxic waters being washed up along the shelf by internal waves. However, a number of these sites have been heavily damaged by bottom trawling along the seabed up to the shelf break, highlighting the persistent threat such activities pose to submerged archaeological sites. (C) 2012 Elsevier Ltd. All rights reserved.