Microbial processes of carbon cycle as the base of food chain of Håkon Mosby Mud Volcano benthic community     

N. Pimenov  A. Savvichev  I. Rusanov  A. Lein  A. Egorov  A. Gebruk  L. Moskalev  P. Vogt 《Geo-Marine Letters》1999,19(1-2):89-96

Box and gravity cores recovered from the Håkon Mosby mud volcano (HMMV) during cruise 15 of the R/V Professor Logachev were analyzed for bacterial activity and benthic fauna distribution. The high bacterium number (up to 9.6×10⁹ cells cm^-3 of the sediment) and marked rates of sulfate reduction (up to 0.155?mg?S?dm^-3?day^-1) and methane oxidation (up to 9.9?μg?C?dm^-3?day^-1) were shown for the upper horizons of the sediments of the HMMV peripheral zone. The benthic community is characterized by the presence of two pogonophoran species, Oligobrachia sp. and Sclerolinum sp., harboring symbiotic methanotrophic bacteria.  相似文献   

Methane gas Seeps Along the Oxic/Anoxic Gradient in the Black Sea: Manifestations, Biogenic Sediment Compounds and Preliminary Results on Benthic Ecology   总被引：2，自引：0，他引：2  

Claudia Luth  Ulf Luth  Audrey V. Gebruk  &Hjalmar Thiel 《Marine Ecology》1999,20(3-4):221-249

Abstract. Sediment parameters (grain size, organic content, chloroplastic pigments, Adenylates, Potential hydrolytic activity and electron transport system activity) and benthic biota were studied in methane seep area south-west of the Crimean Peninsula in the Black Sea over a depth range from 60 to 260m. A control transect with similar depths was performed in an adjacent nonseep area. Methane seepage in this region occurs from 35 to ˜ 85m depth, passing the oxic anoxic interface zone at 130 to 180m. The methane seep areas were characterized by abundant carbonate precipitates which occurred in various shapes from small, flat structures to tall chimneys with increasing anoxia. The carbonates were associated with distinct bacterial mats. Most of the measured biochemical parameters in the sediment were quite similar in the seep and nonseep areas. The content of organic matter was higher and grain size was more uniform in the nonseep areas. However, the seep areas were charaterized by highter proportions of the larger fauna (size classes 0.5–1 mm and ≥ 1mm) as well as increased total numbers of benthic fauna in the suboxic and upper anoxic zone. The animals did not show any seep-specific adaptations. In addition to methane seepage, highly variable hydrochemical and sedimentary conditions on the lower shelf and upper slope may also play an important role in structuring the composition and distribution of the benthic fauna.  相似文献   

Holothuroidea (Echinodermata) of the Peru Basin - Ecological and Taxonomic Remarks Based on Underwater Images     

Hartmut Bluhm  &Andrej Gebruk 《Marine Ecology》1999,20(2):167-195

The megabenthos plays an important role in the abyssal ecosystem. The holothuroids have been proposed as indicators of physical disturbance of the seabed caused, for example, by commercial deep-sea mining of manganese nodules. Environmental studies at seabed mining claims have resulted in numerous still photographs that provide an overview of the megabenthos in manganese nodule fields. Data from these investigations and from the large-scale disturbance and recolonization experiment DISCOL have been used to summarize knowledge of the taxonomy and ecology of holothurians at manganese nodule sites.  相似文献   

Transformation of Benthic Communities in Pechora Bay and the Probable Loss of the Portlandia aestuariorum Population in the Typical Habitat     

Dgebuadze  P. Yu.  Basin  A. B.  Chikina  M. V.  Udalov  A. A.  Balakin  A. A.  Razgon  I. L.  Ermilova  Yu. V.  Chava  V. A.  Gebruk  A. A.  Shabalin  N. V.  Mokievsky  V. O. 《Oceanology》2021,61(6):976-983

Oceanology - A benthic survey is carried out at the typical location of the bivalve species Portlandia aestuariorum in the Pechora Bay of the Barents Sea. The benthic survey using trawling and grab...  相似文献