The degradation of organic matter in the anoxic seabed proceeds through a complex microbial network in which the terminal steps are dominated by oxidation with sulfate or conversion into methane and CO2 The controls on pathway and rate of the degradation process in different geochemical zones remain elusive. Radiotracer techniques were used to perform measurements of sulfate reduction, methanog...

Carbon dioxide from soil respiration is a key source of atmospheric CO2 and a major component of the global carbon cycle. However, the temporal pattern of soil respiration is not well understood and even wrongly modeled. In a 360-day laboratory experiment, we investigated temporal patterns of soil respiration and microbial carbon availability using five soils taken from five altitudinal zones o...

Coastal marshes are important blue carbon reservoirs, but it is unclear how vegetation shifts associated with tidal restoration and sea level rise alter soil microbial respiration rates bacterial community composition. Within 20 Connecticut salt (10 without restrictions, 10 tidally restored), we sampled three zones dominated by Spartina alterniflora (short-form, < 30 cm tall), S. patens, Phragm...

The results on the effectiveness of five 2D electrical resistivity tomography (ERT) survey profiles for Ag-Pb-Zn, fluorite, and barite exploration Mississippi Valley Type (MVT) magmatic deposits northeast Mexico, are presented. were made in areas with mining activities or mineralization outcrops. Schlumberger, dipole-dipole, Wenner array configurations used measurements. showed that electric ca...

the trace element contents on the surface originated from mineralization would depend to the thickness of the calcrete layer above the ore deposit on the surface. a very thick layer of calcrete may not allow for much dispersion of the elements of interest in the surface. these elements may be concentrated in non-magnetic and magnetic part of calcrete. based on the current research, mineralogica...

Substrate cover by corals, soft corals, sand, bare rock and algae was determined by several means for seaward reef slopes of the Central Indian Ocean atolls of Peros Banhos and Salomon, Chagos Archipelago, and in the lagoon of the former. Cover of hard substrate by coelenterates averages 80 O/O between 3 and 42 m, and calcareous algae dominate above and below these depths. Alcyonarian corals co...