title: [New settlers comb jellies Mnemiopsis leidyi (A. Agassiz) and Beroe ovata Mayer 1912 and their influence on the pelagic ecosystem of the northeastern part of the Black Sea].
abstract: We analyzed the condition of pelagic ecosystem of northeastern Black Sea influenced by expansion of a new settler Beroe ovata in 1999-2001. Expansion of B. ovata considerably decreased the population of another new settler Mnemiopsis leidyi that deformed the Black Sea ecosystem for over a decade. Reduction of M. leidyi population limited its influence on the ecosystem and, consequently, we observed reestablishment of the main components of the Black Sea pelagic ecosystem--zooplankton and fish, their spawn and larvae. The relationship between annual and seasonal variability of the population and biomass of the both new settlers M. leidyi and B. ovata are discussed.
authors.affiliation: Shirshov Institute of Oceanology, Russian Academy of Sciences, Nakhimovskii pr. 36, Moscow, 117851 Russia. shiganov@sio.rssi.ru
authors.forename: T A
authors.initials: TA
authors.lastname: Shiganova
authors.forename: E I
authors.initials: EI
authors.lastname: Musaeva
authors.forename: Iu V
authors.initials: IuV
authors.lastname: Bulgakova
authors.forename: Z A
authors.initials: ZA
authors.lastname: Mirzoian
authors.forename: M L
authors.initials: ML
authors.lastname: MartynIuk
mesh_terms: D000818:Animals; D037302:Ctenophora / Q000502:physiology*; D017753:Ecosystem; D004625:Embryo, Nonmammalian; D005399:Fishes / Q000196:embryology / Q000502:physiology; D019083:Mediterranean Region; D011157:Population Dynamics; D037401:Scyphozoa / Q000502:physiology; D012621:Seasons; D015048:Zooplankton / Q000502:physiology
vernacular_title: Grebneviki vselentsy Mnemiopsis leidyi (A. Agassiz) i Beroe ovata Mayer 1912 i ikh vozdeĭstvie na pelagicheskuiu ékosistemu severo-vostochnoĭ chasti Chernogo moria.