نتایج جستجو برای: sedimentary structure
تعداد نتایج: 1577589 فیلتر نتایج به سال:
This study sought to determine the potential of sedimentary cladoceran assemblages for inferring changes in shallow lake ecological structure and function. The first stage o f the study aimed to isolate and quantify the main structuring forces of the contemporary zooplankton community. Zooplankton populations were sampled from 39 mesotrophic to hyper-eutrophic shallow lakes (<3 m average depth)...
The Kishon River, the second largest coastal river in Israel, has been severely polluted for several decades. Sediments from upstream and downstream sites of the river were analyzed, lipid-extracted and evaluated for phenanthrene uptake. Total polycyclic aromatic hydrocarbon (PAH) concentration in downstream sediments was 299 microg kg(-1), consisting mostly of petrogenic-derived PAHs. Downstre...
Response of biological communities to environmental stresses is a critical issue in ecology, but how microbial communities shift across heavy metal gradients remain unclear. To explore the microbial response to heavy metal contamination (e.g., Cr, Mn, Zn), the composition, structure and functional potential of sedimentary microbial community were investigated by sequencing of 16S rRNA gene ampl...
Geological processes alter pore spaces over time, and their analysis can shed light on the dynamic fractal structure fluid flow of rocks time. This study presents experimental evidence to illustrate that evolves with sedimentation, carbonate cementation, clay growth, dissolution. It examines, describes characterizes a suite core samples from Gaotaizi oil layer second third members Qingshankou F...
Maps of sedimentary physical properties are essential to a complete understanding of processes shaping the continental shelf. We have demonstrated that measurements of electrical resistivity can provide exciting new insights into shelf structure. But there is more work to be done in tying results of electromagnetic (EM) studies to those of more conventional surveys such as the extensive coring ...
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The Baraza Slide is located in the northwestern Alboran Sea, between 590 and 830 m water depth, and its morphology, seismic facies and sedimentary structure are analyzed based on multibeam bathymetry and very high to medium resolution single-channel seismic records. During the Pleistocene and Late Quaternary this landslide has undergone repeated slope failures characterized by a succession of t...
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