Details
| Original language | English |
|---|---|
| Pages (from-to) | 31-43 |
| Number of pages | 13 |
| Journal | Soil Biology and Biochemistry |
| Volume | 68 |
| Publication status | Published - Jan 2014 |
Abstract
During long-term ecosystem development, both soil mineralogical composition and nutrient contents change, thus possibly altering microbial nutrient cycling by constraining substrate accessibility. In addressing the mineral impact on nitrogen (N) and phosphorus (P) cycling, we determined microbial abundances, activities of N-hydrolyzing (aminopeptidases, protease, urease) and P-hydrolyzing (phosphatase) enzymes and the potential substrate availability as well as their physicochemical and mineralogical controls in whole soil profiles along the 120kyr-old Franz Josef chronosequence (New Zealand). Pedogenic soil iron (Fe) and aluminum (Al) resided initially (<1kyrs) in metal-humus complexes, changed to poorly crystalline Fe and Al at intermediate-aged sites (1-12kyrs) and into dominance of clay and crystalline Fe oxides at the oldest site. Despite this, organic C (OC) and organic N (ON) stocks increased only slightly with soil age, whereas organic P (OP) stocks decreased continuously. In organic layers, enzyme activities were mainly regulated by ON and OP concentrations, whereas in mineral soils, mineral-enzyme relations were more complex and included both, direct and indirect effects. Protease, urease, and phosphatase activities were inhibited by mineral interactions, especially with poorly crystalline Fe and Al oxides, whereas aminopeptidases were less affected by mineralogical properties. On a pedon basis, most N-hydrolyzing enzyme activities per ON stocks responded negatively to increasing stocks of poorly crystalline Fe and Al minerals, but were also affected by the C:N ratio of labile organic substrates. Profile-based phosphatase activities per OP stock were highest at the oldest sites having the largest stocks of clay and crystalline Fe oxides. Overall, our study indicates that long-term mineral changes create distinct patterns of nutrient accumulation and N- and P-enzyme activities at both horizon and pedon scale, with a variable extent of the mineralogical effect for the different N-hydrolyzing enzymes.
Keywords
- Cell counts, Clay, Enzyme activities, Fe and Al oxides, Microbial biomass, Mineralogical composition, N- and P-hydrolyzing enzymes, N- and P-limitation, Pedon, Soil chronosequence
ASJC Scopus subject areas
- Immunology and Microbiology(all)
- Microbiology
- Agricultural and Biological Sciences(all)
- Soil Science
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In: Soil Biology and Biochemistry, Vol. 68, 01.2014, p. 31-43.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Mineralogical impact on long-term patterns of soil nitrogen and phosphorus enzyme activities
AU - Turner, Stephanie
AU - Schippers, Axel
AU - Meyer-Stüve, Sandra
AU - Guggenberger, Georg
AU - Gentsch, Norman
AU - Dohrmann, Reiner
AU - Condron, Leo M.
AU - Eger, Andre
AU - Almond, Peter C.
AU - Peltzer, Duane A.
AU - Richardson, Sarah J.
AU - Mikutta, Robert
N1 - Funding information: We are grateful to Detlef Spier for HPLC measurements, and Gudrun Mengel-Jung for laboratory support. Furthermore, we acknowledge the help of Ulrike Pieper, Heike Steffen, Pieter Wiese, and Roger-Michael Klatt. Funding was provided by the German Science Foundation (DFG) , grants MI 1377/5-1 and SCHI 535/11-1 to R.M. and A.S. The authors declare no conflicts of interest.
PY - 2014/1
Y1 - 2014/1
N2 - During long-term ecosystem development, both soil mineralogical composition and nutrient contents change, thus possibly altering microbial nutrient cycling by constraining substrate accessibility. In addressing the mineral impact on nitrogen (N) and phosphorus (P) cycling, we determined microbial abundances, activities of N-hydrolyzing (aminopeptidases, protease, urease) and P-hydrolyzing (phosphatase) enzymes and the potential substrate availability as well as their physicochemical and mineralogical controls in whole soil profiles along the 120kyr-old Franz Josef chronosequence (New Zealand). Pedogenic soil iron (Fe) and aluminum (Al) resided initially (<1kyrs) in metal-humus complexes, changed to poorly crystalline Fe and Al at intermediate-aged sites (1-12kyrs) and into dominance of clay and crystalline Fe oxides at the oldest site. Despite this, organic C (OC) and organic N (ON) stocks increased only slightly with soil age, whereas organic P (OP) stocks decreased continuously. In organic layers, enzyme activities were mainly regulated by ON and OP concentrations, whereas in mineral soils, mineral-enzyme relations were more complex and included both, direct and indirect effects. Protease, urease, and phosphatase activities were inhibited by mineral interactions, especially with poorly crystalline Fe and Al oxides, whereas aminopeptidases were less affected by mineralogical properties. On a pedon basis, most N-hydrolyzing enzyme activities per ON stocks responded negatively to increasing stocks of poorly crystalline Fe and Al minerals, but were also affected by the C:N ratio of labile organic substrates. Profile-based phosphatase activities per OP stock were highest at the oldest sites having the largest stocks of clay and crystalline Fe oxides. Overall, our study indicates that long-term mineral changes create distinct patterns of nutrient accumulation and N- and P-enzyme activities at both horizon and pedon scale, with a variable extent of the mineralogical effect for the different N-hydrolyzing enzymes.
AB - During long-term ecosystem development, both soil mineralogical composition and nutrient contents change, thus possibly altering microbial nutrient cycling by constraining substrate accessibility. In addressing the mineral impact on nitrogen (N) and phosphorus (P) cycling, we determined microbial abundances, activities of N-hydrolyzing (aminopeptidases, protease, urease) and P-hydrolyzing (phosphatase) enzymes and the potential substrate availability as well as their physicochemical and mineralogical controls in whole soil profiles along the 120kyr-old Franz Josef chronosequence (New Zealand). Pedogenic soil iron (Fe) and aluminum (Al) resided initially (<1kyrs) in metal-humus complexes, changed to poorly crystalline Fe and Al at intermediate-aged sites (1-12kyrs) and into dominance of clay and crystalline Fe oxides at the oldest site. Despite this, organic C (OC) and organic N (ON) stocks increased only slightly with soil age, whereas organic P (OP) stocks decreased continuously. In organic layers, enzyme activities were mainly regulated by ON and OP concentrations, whereas in mineral soils, mineral-enzyme relations were more complex and included both, direct and indirect effects. Protease, urease, and phosphatase activities were inhibited by mineral interactions, especially with poorly crystalline Fe and Al oxides, whereas aminopeptidases were less affected by mineralogical properties. On a pedon basis, most N-hydrolyzing enzyme activities per ON stocks responded negatively to increasing stocks of poorly crystalline Fe and Al minerals, but were also affected by the C:N ratio of labile organic substrates. Profile-based phosphatase activities per OP stock were highest at the oldest sites having the largest stocks of clay and crystalline Fe oxides. Overall, our study indicates that long-term mineral changes create distinct patterns of nutrient accumulation and N- and P-enzyme activities at both horizon and pedon scale, with a variable extent of the mineralogical effect for the different N-hydrolyzing enzymes.
KW - Cell counts
KW - Clay
KW - Enzyme activities
KW - Fe and Al oxides
KW - Microbial biomass
KW - Mineralogical composition
KW - N- and P-hydrolyzing enzymes
KW - N- and P-limitation
KW - Pedon
KW - Soil chronosequence
UR - http://www.scopus.com/inward/record.url?scp=84884940054&partnerID=8YFLogxK
U2 - 10.1016/j.soilbio.2013.09.016
DO - 10.1016/j.soilbio.2013.09.016
M3 - Article
AN - SCOPUS:84884940054
VL - 68
SP - 31
EP - 43
JO - Soil Biology and Biochemistry
JF - Soil Biology and Biochemistry
SN - 0038-0717
ER -