Global patterns of soil microbial nitrogen and phosphorus stoichiometry in forest ecosystems

Aim To investigate broad-scale patterns of soil microbial nitrogen (N) and phosphorus (P) stoichiometry and their environmental drivers. Location Global forests. Methods By synthesizing 652 observations of soil microbial biomass N and P derived from the published literature, we investigated global patterns of soil microbial N, P and N:P ratios and their relationships with climate, soil and vegetation types. Results Microbial N and P concentrations varied widely among forest types, with relatively low N and P concentrations but high N:P ratios in tropical forests. The N and P concentrations increased and the N:P ratio decreased with increasing latitude (or decreasing temperature). The N:P ratio showed a similar pattern along the precipitation gradient to that along the temperature gradient, whereas microbial N and P displayed weak trends along the precipitation gradient. Edaphic variables also regulated the patterns of microbial N and P stoichiometry: microbial N and P concentrations increased with soil N and P concentrations as well as with soil pH. Mixed-effects models revealed that edaphic factors explained the largest part of the variation in microbial N, P and the N:P ratio, suggesting their dominant role. Main conclusions Our findings highlight that there are broad-scale patterns in microbial N, P and the N:P ratio along the gradients of latitude, temperature and precipitation, which are similar to those reported in plants and soils. The consistency of these patterns in plant–soil–microbe ecosystems supports the hypothesis that P is more often the major limiting element at low latitudes than at high latitudes.

[1]  Jingyun Fang,et al.  Resorption proficiency and efficiency of leaf nutrients in woody plants in eastern China , 2013 .

[2]  Peter E. Thornton,et al.  A global analysis of soil microbial biomass carbon, nitrogen and phosphorus in terrestrial ecosystems , 2013 .

[3]  Jingyun Fang,et al.  Leaf nitrogen and phosphorus concentrations of woody plants differ in responses to climate, soil and plant growth form , 2013 .

[4]  Fusuo Zhang,et al.  Floral, climatic and soil pH controls on leaf ash content in China's terrestrial plants , 2012 .

[5]  P. Reich,et al.  Biogeography and variability of eleven mineral elements in plant leaves across gradients of climate, soil and plant functional type in China. , 2011, Ecology letters.

[6]  P. Reich,et al.  Global-scale latitudinal patterns of plant fine-root nitrogen and phosphorus. , 2011, Nature communications.

[7]  D. Wardle,et al.  The use of chronosequences in studies of ecological succession and soil development , 2010 .

[8]  A. Kerkhoff,et al.  Biological stoichiometry of plant production: metabolism, scaling and ecological response to global change. , 2010, The New phytologist.

[9]  N. Oh,et al.  Atmospheric CO2 enrichment facilitates cation release from soil. , 2010, Ecology letters.

[10]  Stephen Porder,et al.  Terrestrial phosphorus limitation: mechanisms, implications, and nitrogen-phosphorus interactions. , 2010, Ecological applications : a publication of the Ecological Society of America.

[11]  M. Bradford,et al.  Global patterns in belowground communities. , 2009, Ecology letters.

[12]  Han Y. H. Chen,et al.  Global trends in senesced-leaf nitrogen and phosphorus , 2009 .

[13]  P. Brookes,et al.  Substrate inputs and pH as factors controlling microbial biomass, activity and community structure in an arable soil , 2009 .

[14]  T. Kosaki,et al.  Different effects of pH on microbial biomass carbon and metabolic quotients by fumigation–extraction and substrate-induced respiration methods in soils under different climatic conditions , 2009 .

[15]  A. Kooijman,et al.  The relationship between N mineralization or microbial biomass N with micromorphological properties in beech forest soils with different texture and pH , 2009, Biology and Fertility of Soils.

[16]  S. Reed,et al.  Controls Over Leaf Litter and Soil Nitrogen Fixation in Two Lowland Tropical Rain Forests , 2007 .

[17]  C. Cleveland,et al.  C:N:P stoichiometry in soil: is there a “Redfield ratio” for the microbial biomass? , 2007 .

[18]  R. Pal,et al.  Relationship between acidity and microbiological properties in some tea soils , 2007, Biology and Fertility of Soils.

[19]  A. Townsend,et al.  Nutrient additions to a tropical rain forest drive substantial soil carbon dioxide losses to the atmosphere , 2006, Proceedings of the National Academy of Sciences.

[20]  R. B. Jackson,et al.  The diversity and biogeography of soil bacterial communities. , 2006, Proceedings of the National Academy of Sciences of the United States of America.

[21]  J. L. Parra,et al.  Very high resolution interpolated climate surfaces for global land areas , 2005 .

[22]  Dali Guo,et al.  Leaf nitrogen and phosphorus stoichiometry across 753 terrestrial plant species in China. , 2005, The New phytologist.

[23]  S. Güsewell.  N : P ratios in terrestrial plants: variation and functional significance. , 2004, The New phytologist.

[24]  T. Daufresne,et al.  SCALING OF C:N:P STOICHIOMETRY IN FORESTS WORLDWIDE: IMPLICATIONS OF TERRESTRIAL REDFIELD‐TYPE RATIOS , 2004 .

[25]  P. Reich,et al.  Global patterns of plant leaf N and P in relation to temperature and latitude. , 2004, Proceedings of the National Academy of Sciences of the United States of America.

[26]  S. Bridgham,et al.  NITROGEN, PHOSPHORUS, AND CARBON MINERALIZATION IN RESPONSE TO NUTRIENT AND LIME ADDITIONS IN PEATLANDS , 2003 .

[27]  J. Elser,et al.  Ecological Stoichiometry: The Biology of Elements from Molecules to the Biosphere , 2002 .

[28]  A. Townsend,et al.  Phosphorus Limitation of Microbial Processes in Moist Tropical Forests: Evidence from Short-term Laboratory Incubations and Field Studies , 2002, Ecosystems.

[29]  P. Vitousek,et al.  Changing sources of nutrients during four million years of ecosystem development , 1999, Nature.

[30]  David A. Wardle,et al.  CONTROLS OF TEMPORAL VARIABILITY OF THE SOIL MICROBIAL BIOMASS: A GLOBAL-SCALE SYNTHESIS , 1998 .

[31]  T. Anderson,et al.  Relationship between SIR and FE estimates of microbial biomass C in deciduous forest soils at different pH , 1997 .

[32]  P. Vitousek,et al.  Nutrient limitation and soil development: Experimental test of a biogeochemical theory , 1997 .

[33]  W. Koerselman,et al.  The vegetation N:P ratio: a new tool to detect the nature of nutrient limitation , 1996 .

[34]  Peter M. Vitousek,et al.  Changes in soil phosphorus fractions and ecosystem dynamics across a long chronosequence in Hawaii. , 1995 .

[35]  W. Schlesinger,et al.  Factors limiting microbial biomass in the mineral soil and forest floor of a warm-temperate forest , 1994 .

[36]  K. Domsch,et al.  The metabolic quotient for CO2 (qCO2) as a specific activity parameter to assess the effects of environmental conditions, such as ph, on the microbial biomass of forest soils , 1993 .

[37]  D. Wardle,et al.  A COMPARATIVE ASSESSMENT OF FACTORS WHICH INFLUENCE MICROBIAL BIOMASS CARBON AND NITROGEN LEVELS IN SOIL , 1992 .

[38]  P. Brookes,et al.  AN EXTRACTION METHOD FOR MEASURING SOIL MICROBIAL BIOMASS C , 1987 .

[39]  J. Levinton.  THE LATITUDINAL COMPENSATION HYPOTHESIS: GROWTH DATA AND A MODEL OF LATITUDINAL GROWTH DIFFERENTIATION BASED UPON ENERGY BUDGETS. I. INTERSPECIFIC COMPARISON OF OPHRYOTROCHA (POLYCHAETA: DORVILLEIDAE). , 1983, The Biological bulletin.

[40]  F. S. Chapin,et al.  The Mineral Nutrition of Wild Plants , 1980 .

[41]  J. Syers,et al.  The fate of phosphorus during pedogenesis , 1976 .