The soil matrix increases microbial C stabilization in temperate and tropical forest soils

Verfasser / Beitragende:
[Heather Throckmorton, Jeffrey Bird, Nick Monte, Tad Doane, Mary Firestone, William Horwath]
Ort, Verlag, Jahr:
2015
Enthalten in:
Biogeochemistry, 122/1(2015-01-01), 35-45
Format:
Artikel (online)
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024 7 0 |a 10.1007/s10533-014-0027-6  |2 doi 
035 |a (NATIONALLICENCE)springer-10.1007/s10533-014-0027-6 
245 0 4 |a The soil matrix increases microbial C stabilization in temperate and tropical forest soils  |h [Elektronische Daten]  |c [Heather Throckmorton, Jeffrey Bird, Nick Monte, Tad Doane, Mary Firestone, William Horwath] 
520 3 |a Microbial biomass represents a substantial source of labile C contributing to soil organic matter (SOM) maintenance. Microbial residues may associate with the soil matrix through a variety of mechanisms, reducing its bioavailability and increasing its persistence in soil. Our objective was to examine soil matrix effects on the stability of non-living microbial C inputs in two contrasting forest ecosystems by following microbial residues (Fungi, Actinobacteria, Gram-positive bacteria (Gm +), Gram-negative bacteria (Gm −)) into SOM fractions in a temperate forest in California (CA) and a tropical forest in Puerto Rico (PR) for 3 and 2 years, respectively. We isolated 3 SOM fractions: (i) free light fraction (FLF), (ii) occluded light fraction (OLF), and (iii) dense fraction (DF). Additionally, we characterized SOM fraction chemistry to infer quality and source of native fraction SOM. Our results showed greater stabilization as mineral-associated microbial C (i.e., as DF and OLF), compared with loose detrital C (i.e., FLF). There was no microbial group effect (i.e., differences in fraction C recovery among different microbial cell types). Our findings suggest that mineral association is more important for stabilizing non-living microbial C in soil than the cellular structure of the initial source of microbial inputs, with site specific edaphic factors as the major controllers of the amount of microbial residues stabilized. 
540 |a Springer International Publishing Switzerland, 2014 
690 7 |a Microorganisms  |2 nationallicence 
690 7 |a Fungi  |2 nationallicence 
690 7 |a Bacteria  |2 nationallicence 
690 7 |a Carbon  |2 nationallicence 
690 7 |a Soil organic matter  |2 nationallicence 
690 7 |a Mineral protection  |2 nationallicence 
690 7 |a Stabilization  |2 nationallicence 
700 1 |a Throckmorton  |D Heather  |u Los Alamos National Lab, MS 495, 87545, Los Alamos, NM, USA  |4 aut 
700 1 |a Bird  |D Jeffrey  |u Queens College CUNY, 65-30 Kissena Blvd., 11367, Flushing, NY, USA  |4 aut 
700 1 |a Monte  |D Nick  |u University of California, One Shields Ave., 95616, Davis, CA, USA  |4 aut 
700 1 |a Doane  |D Tad  |u University of California, One Shields Ave., 95616, Davis, CA, USA  |4 aut 
700 1 |a Firestone  |D Mary  |u University of California, 137 Mulford Hall, Berkeley, 94720, Berkeley, CA, USA  |4 aut 
700 1 |a Horwath  |D William  |u University of California, One Shields Ave., 95616, Davis, CA, USA  |4 aut 
773 0 |t Biogeochemistry  |d Springer International Publishing  |g 122/1(2015-01-01), 35-45  |x 0168-2563  |q 122:1<35  |1 2015  |2 122  |o 10533 
856 4 0 |u https://doi.org/10.1007/s10533-014-0027-6  |q text/html  |z Onlinezugriff via DOI 
898 |a BK010053  |b XK010053  |c XK010000 
900 7 |a Metadata rights reserved  |b Springer special CC-BY-NC licence  |2 nationallicence 
908 |D 1  |a research-article  |2 jats 
949 |B NATIONALLICENCE  |F NATIONALLICENCE  |b NL-springer 
950 |B NATIONALLICENCE  |P 856  |E 40  |u https://doi.org/10.1007/s10533-014-0027-6  |q text/html  |z Onlinezugriff via DOI 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Throckmorton  |D Heather  |u Los Alamos National Lab, MS 495, 87545, Los Alamos, NM, USA  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Bird  |D Jeffrey  |u Queens College CUNY, 65-30 Kissena Blvd., 11367, Flushing, NY, USA  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Monte  |D Nick  |u University of California, One Shields Ave., 95616, Davis, CA, USA  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Doane  |D Tad  |u University of California, One Shields Ave., 95616, Davis, CA, USA  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Firestone  |D Mary  |u University of California, 137 Mulford Hall, Berkeley, 94720, Berkeley, CA, USA  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Horwath  |D William  |u University of California, One Shields Ave., 95616, Davis, CA, USA  |4 aut 
950 |B NATIONALLICENCE  |P 773  |E 0-  |t Biogeochemistry  |d Springer International Publishing  |g 122/1(2015-01-01), 35-45  |x 0168-2563  |q 122:1<35  |1 2015  |2 122  |o 10533