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  • 1.
    George, T. S.
    et al.
    James Hutton Inst, Dundee DD2 5DA, Scotland.
    Giles, C. D.
    James Hutton Inst, Dundee DD2 5DA, Scotland.
    Menezes-Blackburn, D.
    Univ Lancaster, Lancaster Environm Ctr, Lancaster LA1 4YQ, England.
    Condron, L. M.
    Lincoln Univ, Christchurch 7647, New Zealand.
    Gama-Rodrigues, A. C.
    Univ Estadual Norte Flumninense Darcy Ribeiro, UENF, Lab Solos, Av Alberto Lamego 2000, Campos Dos Goytacazes, RJ, Brazil.
    Jaisi, D.
    Univ Delaware, Plant & Soil Sci, 160 Townsend Hall, Newark, DE 19716 USA.
    Lang, F.
    Univ Freiburg, Chair Soil Ecol, Fac Environm & Nat Resources, Bertoldstr 17, D-79098 Freiburg, Germany.
    Neal, A. L.
    Rothamsted Res, Harpenden AL5 2JQ, Herts, England.
    Stutter, M. , I
    Almeida, D. S.
    Sao Paulo State Univ, UNESP, Dept Crop Sci, Coll Agr Sci, 1780 Jose Barbosa de Barros St, Botucatu, SP, Brazil.
    Bol, R.
    Forschungszentrum Julich, Inst Bio & Geosci IBG Agrosphere 3, D-52425 Julich, Germany.
    Cabugao, K. G.
    Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA.
    Celi, L.
    Univ Turin, Soil Biogeochem, DISAFA, Largo Braccini 2, I-10095 Turin, Italy.
    Cotner, J. B.
    Univ Minnesota, 1479 Gortner Ave St Paul, Twin, MN 55108 USA.
    Feng, G.
    China Agr Univ, Beijing, Peoples R China.
    Goll, D. S.
    IPSL LSCE CEA CNRS UVSQ Saclay, Lab Sci Climat & Environm, Gif Sur Yvette, France.
    Hallama, M.
    Univ Hohenheim, Inst Soil Sci, Emil Wolff Str 27, D-70599 Stuttgart, Germany.
    Krueger, J.
    Univ Freiburg, Chair Soil Ecol, Fac Environm & Nat Resources, Bertoldstr 17, D-79098 Freiburg, Germany.
    Plassard, C.
    INRA, UMR ECO & SOLS, Montpellier, France.
    Rosling, Anna
    Uppsala universitet, Evolutionsbiologi.
    Darch, T.
    Rothamsted Res, Okehampton EX20 2SB, Devon, England.
    Fraser, T.
    Univ Reading, Sch Agr Policy & Dev, Ctr Agrienvironm Res, POB 237, Reading RG6 6AR, Berks, England.
    Giesler, R.
    Umea Univ, Dept Ecol & Environm Sci, Climate Impacts Res Ctr, S-98107 Abisko, Sweden.
    Richardson, A. E.
    CSIRO Agr & Food, Canberra, ACT, Australia.
    Tamburini, F.
    ETH, D USYS, Tannenstr 1, CH-8092 Zurich, Switzerland.
    Shand, C. A.
    James Hutton Inst, Aberdeen AB15 8QH, Scotland.
    Lumsdon, D. G.
    James Hutton Inst, Aberdeen AB15 8QH, Scotland.
    Zhang, H.
    Univ Lancaster, Lancaster Environm Ctr, Lancaster LA1 4YQ, England.
    Blackwell, M. S. A.
    Rothamsted Res, Okehampton EX20 2SB, Devon, England.
    Wearing, C.
    Univ Lancaster, Lancaster Environm Ctr, Lancaster LA1 4YQ, England.
    Mezeli, M. M.
    James Hutton Inst, Dundee DD2 5DA, Scotland.
    Almas, A. R.
    Norwegian Univ Life Sci, Dept Environm Sci, Post Box 5003, N-1432 As, Norway.
    Audette, Y.
    Univ Guelph, 50 Stone Rd East, Guelph, ON N1G 2W1, Canada.
    Bertrand, I
    INRA, UMR ECO & SOLS, Montpellier, France.
    Beyhaut, E.
    Natl Inst Agr Res Uruguay, Montevideo, Uruguay.
    Boitt, G.
    Lincoln Univ, Christchurch 7647, New Zealand.
    Bradshaw, N.
    Univ Sheffield, Dept Chem & Biol Engn, Mappin St, Sheffield S1 3JD, S Yorkshire, England.
    Brearley, C. A.
    Univ East Anglia, Sch Biol Sci, Norwich Res Pk, Norwich NR4 7TJ, Norfolk, England.
    Bruulsema, T. W.
    Int Plant Nutr Inst, 18 Maplewood Dr, Guelph, ON N1G 1L8, Canada.
    Ciais, P.
    IPSL LSCE CEA CNRS UVSQ Saclay, Lab Sci Climat & Environm, Gif Sur Yvette, France.
    Cozzolino, V
    Univ Napoli Federico II, Ctr Interdipartimentale Ric Risonanza Magnet Nucl, Via Univ 100, I-80055 Portici, Italy.
    Duran, P. C.
    Univ La Frontera, Temuco, Chile.
    Mora, M. L.
    Univ Napoli Federico II, Ctr Interdipartimentale Ric Risonanza Magnet Nucl, Via Univ 100, I-80055 Portici, Italy.
    de Menezes, A. B.
    Univ Salford, Sch Environm & Life Sci, Manchester M5 4WT, The Crescent, England.
    Dodd, R. J.
    Bangor Univ, Sch Environm Nat Resources & Geog, Bangor LL57 2UW, Gwynedd, Wales.
    Dunfield, K.
    Univ Guelph, 50 Stone Rd East, Guelph, ON N1G 2W1, Canada.
    Engl, C.
    Queens Univ Belfast, Med Biol Ctr, Sch Biol Sci, 97 Lisburn Rd, Belfast BT9 7BL, Antrim, North Ireland;Queens Univ Belfast, Med Biol Ctr, Inst Global Food Secur, 97 Lisburn Rd, Belfast BT9 7BL, Antrim, North Ireland.
    Frazao, J. J.
    Univ Sao Paulo, CENA, Ave Centenario 303, BR-13416000 Piracicaba, SP, Brazil.
    Garland, G.
    ETH, D USYS, Tannenstr 1, CH-8092 Zurich, Switzerland.
    Jimenez, J. L. Gonzalez
    Johnstown Castle Co, TEAGASC, Environm Res Ctr, Wexford, Ireland.
    Graca, J.
    Johnstown Castle Co, TEAGASC, Environm Res Ctr, Wexford, Ireland.
    Granger, S. J.
    Rothamsted Res, Okehampton EX20 2SB, Devon, England.
    Harrison, A. F.
    Ctr Ecol & Hydrol, Lib Ave, Lancaster LA1 4AP, England.
    Heuck, C.
    Univ Bayreuth, Bayreuth Ctr Ecol & Environm Res BayCEER, Dept Soil Biogeochem, Dr Hans Frisch Str 1-3, D-95448 Bayreuth, Germany.
    Hou, E. Q.
    Chinese Acad Sci, South China Bot Garden, Guangdong Prov Key Lab Appl Bot, 723 Xingke Rd, Guangzhou 510650, Guangdong, Peoples R China.
    Johnes, P. J.
    Univ Bristol, Sch Geog Sci, Univ Rd, Bristol BS8 1SS, Avon, England;Univ Bristol, Sch Chem, Univ Rd, Bristol BS8 1SS, Avon, England.
    Kaiser, K.
    Martin Luther Univ Halle Wittenberg, Soil Sci & Soil Protect, von Seckendorff Pl 3, D-06120 Halle, Saale, Germany.
    Kjaer, H. A.
    Univ Copenhagen, Ctr Ice & Climate, Niels Bohr Inst, Copenhagen, Denmark.
    Klumpp, E.
    Uppsala universitet, Evolutionsbiologi.
    Lamb, A. L.
    British Geol Survey, NERC Isotope Geosci Facil, Nottingham NG12 5GG, England.
    Macintosh, K. A.
    Queens Univ Belfast, Med Biol Ctr, Sch Biol Sci, 97 Lisburn Rd, Belfast BT9 7BL, Antrim, North Ireland;Queens Univ Belfast, Med Biol Ctr, Inst Global Food Secur, 97 Lisburn Rd, Belfast BT9 7BL, Antrim, North Ireland.
    Mackay, E. B.
    Ctr Ecol & Hydrol, Lib Ave, Lancaster LA1 4AP, England.
    McGrath, J.
    Queens Univ Belfast, Med Biol Ctr, Sch Biol Sci, 97 Lisburn Rd, Belfast BT9 7BL, Antrim, North Ireland;Queens Univ Belfast, Med Biol Ctr, Inst Global Food Secur, 97 Lisburn Rd, Belfast BT9 7BL, Antrim, North Ireland.
    McIntyre, C.
    Univ Bristol, Sch Geog Sci, Univ Rd, Bristol BS8 1SS, Avon, England;Univ Bristol, Sch Chem, Univ Rd, Bristol BS8 1SS, Avon, England.
    McLaren, T.
    ETH, D USYS, Tannenstr 1, CH-8092 Zurich, Switzerland.
    Meszaros, E.
    ETH, D USYS, Tannenstr 1, CH-8092 Zurich, Switzerland.
    Missong, A.
    Forschungszentrum Julich, Inst Bio & Geosci IBG Agrosphere 3, D-52425 Julich, Germany.
    Mooshammer, M.
    Univ Vienna, Dept Microbiol & Ecosyst Sci, Althanstr 14, A-1090 Vienna, Austria.
    Negron, C. P.
    Univ La Frontera, Temuco, Chile.
    Nelson, L. A.
    Univ Northern British Columbia, 3333 Univ Way, Prince George, BC V2N 4Z9, Canada.
    Pfahler, V
    Rothamsted Res, Okehampton EX20 2SB, Devon, England.
    Poblete-Grant, P.
    Univ La Frontera, Temuco, Chile.
    Randall, M.
    Brigham Young Univ, Provo, UT 84602 USA.
    Seguel, A.
    Univ La Frontera, Temuco, Chile.
    Seth, K.
    Lincoln Univ, Christchurch 7647, New Zealand.
    Smith, A. C.
    British Geol Survey, NERC Isotope Geosci Facil, Nottingham NG12 5GG, England.
    Smits, M. M.
    Hasselt Univ, Ctr Environm Sci, Bldg D,Agoralaan, B-3590 Diepenbeek, Belgium.
    Sobarzo, J. A.
    Univ La Frontera, Temuco, Chile.
    Spohn, M.
    Univ Bayreuth, Bayreuth Ctr Ecol & Environm Res BayCEER, Dept Soil Biogeochem, Dr Hans Frisch Str 1-3, D-95448 Bayreuth, Germany.
    Tawaraya, K.
    Yamagata Univ, Tsuruoka, Yamagata 9978555, Japan.
    Tibbett, M.
    Univ Reading, Sch Agr Policy & Dev, Ctr Agrienvironm Res, POB 237, Reading RG6 6AR, Berks, England.
    Voroney, P.
    Univ Guelph, 50 Stone Rd East, Guelph, ON N1G 2W1, Canada.
    Wallander, H.
    Lund Univ, Dept Biol, Biol Bldg Solvegatan 35, S-22362 Lund, Sweden.
    Wang, L.
    Forschungszentrum Julich, Inst Bio & Geosci IBG Agrosphere 3, D-52425 Julich, Germany.
    Wasaki, J.
    Hiroshima Univ, Grad Sch Biosphere Sci, Assessment Microbial Environm, Hiroshima, Japan.
    Haygarth, P. M.
    Univ Lancaster, Lancaster Environm Ctr, Lancaster LA1 4YQ, England.
    Organic phosphorus in the terrestrial environment: a perspective on the state of the art and future priorities2018In: Plant and Soil, ISSN 0032-079X, E-ISSN 1573-5036, Vol. 427, no 1-2, p. 191-208Article in journal (Refereed)
    Abstract [en]

    The dynamics of phosphorus (P) in the environment is important for regulating nutrient cycles in natural and managed ecosystems and an integral part in assessing biological resilience against environmental change. Organic P (P-o) compounds play key roles in biological and ecosystems function in the terrestrial environment being critical to cell function, growth and reproduction. We asked a group of experts to consider the global issues associated with P-o in the terrestrial environment, methodological strengths and weaknesses, benefits to be gained from understanding the P-o cycle, and to set priorities for P-o research. We identified seven key opportunities for P-o research including: the need for integrated, quality controlled and functionally based methodologies; assessment of stoichiometry with other elements in organic matter; understanding the dynamics of P-o in natural and managed systems; the role of microorganisms in controlling P-o cycles; the implications of nanoparticles in the environment and the need for better modelling and communication of the research. Each priority is discussed and a statement of intent for the P-o research community is made that highlights there are key contributions to be made toward understanding biogeochemical cycles, dynamics and function of natural ecosystems and the management of agricultural systems.

  • 2.
    Lett, Signe
    et al.
    Umeå universitet, Institutionen för ekologi, miljö och geovetenskap.
    Michelsen, Anders
    Department of Biology, Terrestrial Ecology Section, University of Copenhagen, Øster Farimagsgade 2D, Copenhagen, DK-1353 K, Denmark.
    Seasonal variation in nitrogen fixation and effects of climate change in a subarctic heath2014In: Plant and Soil, ISSN 0032-079X, E-ISSN 1573-5036, Vol. 379, no 1-2, p. 193-204Article in journal (Refereed)
    Abstract [en]

    Nitrogen fixation associated with cryptogams is potentially very important in arctic and subarctic terrestrial ecosystems, as it is a source of new nitrogen (N) into these highly N limited systems. Moss-, lichen- and legume-associated N-2 fixation was studied with high frequency (every second week) during spring, summer, autumn and early winter to uncover the seasonal variation in input of atmospheric N-2 to a subarctic heath with an altered climate. We estimated N-2 fixation from ethylene production by acetylene reduction assay in situ in a field experiment with the treatments: long- vs. short-term summer warming using plastic tents and litter addition (simulating expansion of the birch forest). N-2 fixation activity was measured from late April to mid November and 33 % of all N-2 was fixed outside the vascular plant growing season (Jun-Aug). This substantial amount underlines the importance of N-2 fixation in the cold period. Warming increased N-2 fixation two- to fivefold during late spring. However, long-term summer warming tended to decrease N-2 fixation outside the treatment (tents present) period. Litter alone did not alter N-2 fixation but in combination with warming N-2 fixation increased, probably because N-2 fixation became phosphorus limited under higher temperatures, which was alleviated by the P supply from the litter. In subarctic heath, the current N-2 fixation period extends far beyond the vascular plant growing season. Climate warming and indirect effects such as vegetation changes affect the process of N-2 fixation in different directions and thereby complicate predictions of future N cycling.

  • 3.
    Sundqvist, Maja K.
    et al.
    Umeå universitet, Institutionen för ekologi, miljö och geovetenskap.
    Wardle, David A.
    Department of Forest Ecology and Management, SLU, Umeå, Sweden.
    Vincent, Andrea
    Umeå universitet, Institutionen för ekologi, miljö och geovetenskap.
    Giesler, Reiner
    Umeå universitet, Institutionen för ekologi, miljö och geovetenskap.
    Contrasting nitrogen and phosphorus dynamics across an elevational gradient for subarctic tundra heath and meadow vegetation2014In: Plant and Soil, ISSN 0032-079X, E-ISSN 1573-5036, Vol. 383, no 1-2, p. 387-399Article in journal (Refereed)
    Abstract [en]

    This study explores soil nutrient cycling processes and microbial properties for two contrasting vegetation types along an elevational gradient in subarctic tundra to improve our understanding of how temperature influences nutrient availability in an ecosystem predicted to be sensitive to global warming. We measured total amino acid (Amino-N), mineral nitrogen (N) and phosphorus (P) concentrations, in situ net N and P mineralization, net Amino-N consumption, and microbial biomass C, N and P in both heath and meadow soils across an elevational gradient near Abisko, Sweden. For the meadow, NH4 (+) concentrations and net N mineralization were highest at high elevations and microbial properties showed variable responses; these variables were largely unresponsive to elevation for the heath. Amino-N concentrations sometimes showed a tendency to increase with elevation and net Amino-N consumption was often unresponsive to elevation. Overall, PO4-P concentrations decreased with elevation and net P immobilization mostly occurred at lower elevations; these effects were strongest for the heath. Our results reveal that elevation-associated changes in temperature can have contrasting effects on the cycling of N and P in subarctic soils, and that the strength and direction of these effects depend strongly on dominant vegetation type.

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