Benthic microbial decomposition in the Pichavaram mangroves, India

Rates and pathways of microbial decomposition were measured in 4 stands of mangrove forest in Pichavaram, Vellar-Coleroon estuarine complex, Tamil Nadu, India.Rates of total carbon oxidation were assessed. Measurements of fluxes of total carbon oxidation (Tcox), dissolved O2, and inorganic nutrients (nitrite, nitrate, ammonium, phophate, silicate) were made across the soil-water interface.Net rates of iron and manganese reduction were estimated with a core-incubation method. Sulphate reductions were measured using core injection technique.Data variables from the sites (2 disturbed and 2 undisturbed mangrove stands) cover sample depths, the seasons (wet/monsoon and dry/post-monsoon). Pore water samples were measured for: salinity (as practical salinity units), water content, surface soil temperature, and metal concentrations (micromolar for Fe and Mn; millimolar for S).
To determine any alterations in biogeochemical activity and the influence of human-induced disturbance on these.To determine rates and pathways of microbial processes to better understand the role of mangroves in global carbon and nitrogen cycling.

本数据集针对印度泰米尔纳德邦韦拉尔-科勒龙河口复合体皮查瓦拉姆区域的4处红树林林分，测定了微生物分解的速率与途径，并评估了总碳氧化速率。在土-水界面处，对总碳氧化（total carbon oxidation, Tcox）通量、溶解氧及无机营养盐（亚硝酸盐、硝酸盐、铵盐、磷酸盐、硅酸盐）进行了通量测定。采用芯层培养法估算了铁与锰还原的净速率，通过芯层注入技术测定了硫酸盐还原速率。
该数据集的采样位点包含2处受干扰红树林林分与2处未受干扰红树林林分，采集的变量涵盖采样深度与季节（湿季/季风季、干季/季风后季）。对孔隙水样品的检测指标包括：盐度（实用盐度单位，practical salinity units）、含水率、地表土壤温度，以及金属离子浓度（铁、锰以微摩尔计，硫以毫摩尔计）。
本数据集旨在探究生物地球化学活动的变化及人为干扰对其产生的影响，并解析微生物过程的速率与途径，以深入理解红树林在全球碳、氮循环中发挥的作用。