Microbial biomass carbon was not affected by A. caliginosa, but microbial biomass N was affected by an earthworm × biosolids interaction at week 1 and 12.
Results showed that both the biomass of understory fine roots and soil faunal diversity along with soil total carbon and microbial biomass carbon were significantly reduced by the fine mesh bags (P < 0.01).
The δ13C of the PLFAs indicated that soil microorganisms incorporated more carbon from the residues than from the rhizodeposits and that the microbial use of wheat residue carbon was restricted to 1 mm from the residue compartment.
The correlation of mite assemblage with organic and microbial carbon has been observed numerous times [15,57 59].
The remaining five soil properties water content, pH, basal respiration, microbial and organic carbon were used for the DistLM analysis and the following canonical correspondence analysis (CCA).
According to the "soil microbial loop" concept, nutrients and carbon are cycled between soil and microbial pools [16], [17], [18], and inorganic and organic nutrients of low molecular mass become available through microbial turnover of soil organic matter and are subsequently 'scavenged' by the plant root.
This isotopic portrait of carbon assimilation by the in situ, free-living microbial community, integrated over >50,000 L of seawater, implies that recent, photosynthetic carbon is not always the major carbon source supporting microbial community production in the mesopelagic realm.
Total microbial carbon and nitrogen were estimated as the difference between fumigated and unfumigated samples (expressed on an oven-dry mass basis), divided by appropriate conversion factors [44] [45].
A better indication of the importance of PAH carbon as a proportion of the total microbial carbon demand may be phenanthrene and fluoranthene mineralization, which (summed with naphthalene mineralization) on average supported 5.6% of bacterial carbon demand in the summer, 3.3% in the spring, but only 1.2% in winter.
