نتایج جستجو برای: gas seep
تعداد نتایج: 246084 فیلتر نتایج به سال:
Recent field observations have identified the widespread occurrence of fluid seepage through the eastern Mediterranean Sea floor in association with mud volcanism or along deep faults. Gas hydrates and methane seeps are frequently found in cold seep areas and were anticipated targets of the MEDINAUT/MEDINETH initiatives. The study presented herein has utilized a multidisciplinary approach incor...
Authigenic carbonate build-ups develop at seafloor methane-seeps, where microbially mediated sulphate-dependent anaerobic oxidation of methane facilitates carbonate precipitation. Despite being valuable recorders of past methane seepage events, their role as archives of atmospheric processes has not been examined. Here we show that cyclic sedimentation pulses related to the Indian monsoon in co...
Knowledge about community structure and genetic diversity can help assess the potential for change in loss restoration of biodiversity, thereby facilitating effective management ecosystem protection. Macroinvertebrate communities are an important biotic component deep sea cold seep ecosystems. As Haima is increasingly being assessed its gas hydrate mineral wealth, knowledge characteristics macr...
In this paper, we introduce and study an inertial algorithm for approximating solutions of split equality fixed point problem (SEFPP), involving quasi-phi-nonexpansive mappings in uniformly smooth 2-uniformly convex real Banach spaces establish a strong convergence theorem. We give applications our result to (SEP), variational inclusion (SEVIP) equilibrium (SEEP). Our results extend, generalize...
در این مطالعه اثرات باطله های سدهای رسوبگیر بر آلودگی خاک مورد بررسی قرار گرفته است. به این منظور با استفاده از روش برنامه ریزی ژنتیک که روشی نوین، سریع و دقیق بوده و با استفاده از داده های معتبر اولیه، ضریب نفوذ پذیری خاک بستر و بدنه سد مدل شده است. به منظور مدل کردن ضریب نفوذ پذیری از برنامه matlab استفاده شده است. سپس پدیده های مختلف حین نشت سیال آلوده کننده در فازهای مختلف بررسی گردیده است....
Material fluxes associated with fluid expulsion at cold seeps and their contribution to oceanographic budgets have not been accurately constrained. Here we present evidence that the barium released at cold seeps along the San Clemente Fault zone may significantly impact the geochemical budget of barium within the basin. Barium fluxes at seep localities on the fault scarp, measured with benthic ...
We have purified DNA from gill tissue of a marine bivalve, Calyptogena soyoae, collected from the deep-sea cold seep communities in Sagami Bay, Japan. An rRNA gene was amplified, cloned, and sequenced. In situ hybridization revealed that the sequence is that of a bacterial endosymbiont within the gill of C. soyoae.
New insight into strati¢cationofanaerobicmethanotrophs in cold seep sediments Irene Roalkvam, Steffen Leth Jørgensen, Yifeng Chen, Runar Stokke, Håkon Dahle, William Peter Hocking, Anders Lanzén, Haflidi Haflidason & Ida Helene Steen Department of Biology, Centre for Geobiology, University of Bergen, Norway; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, China; and Department...
During the discovery and description of seven New Zealand methane seep sites, an infaunal assemblage dominated by ampharetid polychaetes was found in association with high seabed methane emission. This ampharetid-bed assemblage had a mean density of 57,000 6 7800 macrofaunal individuals m22 and a maximum wet biomass of 274 g m22, both being among the greatest recorded from deep-sea methane seep...
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