Fungi Benefit from Two Decades of Increased Nutrient Availability in Tundra Heath Soil

Rinnan, Riikka; Michelsen, Anders; Bååth, Erland
February 2013
PLoS ONE;Feb2013, Vol. 8 Issue 2, p1
Academic Journal
If microbial degradation of carbon substrates in arctic soil is stimulated by climatic warming, this would be a significant positive feedback on global change. With data from a climate change experiment in Northern Sweden we show that warming and enhanced soil nutrient availability, which is a predicted long-term consequence of climatic warming and mimicked by fertilization, both increase soil microbial biomass. However, while fertilization increased the relative abundance of fungi, warming caused only a minimal shift in the microbial community composition based on the phospholipid fatty acid (PLFA) and neutral lipid fatty acid (NLFA) profiles. The function of the microbial community was also differently affected, as indicated by stable isotope probing of PLFA and NLFA. We demonstrate that two decades of fertilization have favored fungi relative to bacteria, and increased the turnover of complex organic compounds such as vanillin, while warming has had no such effects. Furthermore, the NLFA-to-PLFA ratio for 13C-incorporation from acetate increased in warmed plots but not in fertilized ones. Thus, fertilization cannot be used as a proxy for effects on warming in arctic tundra soils. Furthermore, the different functional responses suggest that the biomass increase found in both fertilized and warmed plots was mediated via different mechanisms.


Related Articles

  • The effects of earthworms, botanical diversity and fertiliser type on the vertical distribution of soil nutrients and plant nutrient acquisition. Massey, P.; Creamer, R.; Schulte, R.; Whelan, M.; Ritz, K. // Biology & Fertility of Soils;Nov2013, Vol. 49 Issue 8, p1189 

    The application of phosphorus (P)-based fertiliser to agricultural soils can result in a skewed vertical distribution of P down the soil profile, since the element tends to accumulate at the soil surface. Such accumulation can have detrimental effects on the environment, as the erosion of...

  • SOIL MYCOFLORA OF SOME KHARIF (MONSOON) CROPS OF NANDED DISTRICTS. Shekh, N. F.; Mohrir, M. N.; Gachande, B. D. // Science Research Reporter;Oct2012, Vol. 2 Issue 3, p221 

    Soil is an important panorama characterized by different physicochemical parameters that holds enormous number of microorganisms. Present study deals the rhizosphere & non- rhizosphere soil mycoflora of some kharif crops of Nanded districts. Which mainly include Gossypium sp, Sorghum vulgarae...

  • Arbuscular mycorrhizal hyphae promote priming of native soil organic matter mineralisation. Paterson, Eric; Sim, Allan; Davidson, Jane; Daniell, Timothy // Plant & Soil;Nov2016, Vol. 408 Issue 1/2, p243 

    Background and aims: Arbuscular mycorrhizal (AM) hyphae represent an important route for input of plant-derived C to soil, but impacts of these inputs on microbial communities and processes are poorly understood. In this study we characterised pathways of C-flow through microbial communities...

  • Arbuscular Mycorrhizas, Microbial Communities, Nutrient Availability, and Soil Aggregates in Organic Tomato Production. Cavagnaro, T. R.; Jackson, L. E.; Six, J.; Ferris, H.; Goyal, S.; Asami, D.; Scow, K. M. // Plant & Soil;Apr2006, Vol. 282 Issue 1/2, p209 

    Effects of arbuscular mycorrhzal (AM) fungi on plant growth and nutrition are well-known, but their effects on the wider soil biota are less clear. This is in part due to difficulties with establishing appropriate non-mycorrhizal controls in the field. Here we present results of a field...

  • Composition of Methane-Oxidizing Bacterial Communities as a Function of Nutrient Loading in the Florida Everglades. Chauhan, Ashvini; Pathak, Ashish; Ogram, Andrew // Microbial Ecology;Oct2012, Vol. 64 Issue 3, p750 

    Agricultural runoff of phosphorus (P) in the northern Florida Everglades has resulted in several ecosystem level changes, including shifts in the microbial ecology of carbon cycling, with significantly higher methane being produced in the nutrient-enriched soils. Little is, however, known of the...

  • Decoupling of soil nutrient cycles as a function of aridity in global drylands. Delgado-Baquerizo, Manuel; Maestre, Fernando T.; Gallardo, Antonio; Bowker, Matthew A.; Wallenstein, Matthew D.; Quero, Jose Luis; Ochoa, Victoria; Gozalo, Beatriz; García-Gómez, Miguel; Soliveres, Santiago; García-Palacios, Pablo; Berdugo, Miguel; Valencia, Enrique; Escolar, Cristina; Arredondo, Tulio; Barraza-Zepeda, Claudia; Bran, Donaldo; Carreira, José Antonio; Chaieb, Mohamed; Conceição, Abel A. // Nature;10/31/2013, Vol. 502 Issue 7473, p672 

    The biogeochemical cycles of carbon (C), nitrogen (N) and phosphorus (P) are interlinked by primary production, respiration and decomposition in terrestrial ecosystems. It has been suggested that the C, N and P cycles could become uncoupled under rapid climate change because of the different...

  • Effect of wood ash and nitrogen fertilization on soil chemical properties, soil microbial processes, and stand growth in two coniferous stands in Finland. Saarsalmi, Anna; Smolander, Aino; Kukkola, Mikko; Arola, Merja // Plant & Soil;Jun2010, Vol. 331 Issue 1/2, p329 

    The aim of our study was to investigate long-term effects of wood ash fertilization, given together with nitrogen, on soil chemical properties, soil microbiological processes related to C and N cycling, and tree growth. The study was carried out in a 31-year-old Scots pine stand and in a...

  • Enzyme secretion by ECM fungi and exploitation of mineral nutrients from soil organic matter. Pritsch, Karin; Garbaye, Jean // Annals of Forest Science (EDP Sciences);Jan2011, Vol. 68 Issue 1, p25 

    Introduction: Important nutrients in forest soils such as nitrogen and phosphorus are mostly recycled from natural polymeric compounds contained in litter and organic debris-for example nucleic acids, proteins, or chitin. Objectives: Activities of enzymes such as phosphatases, proteases,...

  • Changes in N-Transforming Archaea and Bacteria in Soil during the Establishment of Bioenergy Crops. Mao, Yuejian; Yannarell, Anthony C.; Mackie, Roderick I. // PLoS ONE;2011, Vol. 6 Issue 9, p1 

    Widespread adaptation of biomass production for bioenergy may influence important biogeochemical functions in the landscape, which are mainly carried out by soil microbes. Here we explore the impact of four potential bioenergy feedstock crops (maize, switchgrass, Miscanthus X giganteus, and...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics