Temperature and plant species control over litter decomposition in Alaskan tundra

I compared effects of increased temperature and litter from different Alaskan tundra plant species on cycling of carbon and nitrogen through litter and soil in microcosms. Warming between 4° and 10°C significantly increased rates of soil and litter respiration, litter decomposition, litter nitrogen release, and soil net nitrogen mineralization. Thus, future warming will directly increase rates of carbon and nitrogen cycling through litter and soil in tundra. In addition, differences among species' litter in rates of decomposition, N release, and effects on soil net nitrogen mineralization were sometimes larger than differences between the two temperature treatments within a species. Thus, changes in plant community structure and composition associated with future warming will have important consequences for how elements cycle through litter and soil in tundra. In general, species within a growth form (graminoids, evergreen shrubs, deciduous shrubs, and mosses) were more similar in their effects on decomposition than were species belonging to different growth forms, with graminoid litter having the fastest rate and litter of deciduous shrubs and mosses having the slowest rates. Differences in rates of litter decomposition were more related to carbon quality than to nitrogen concentration. Increased abundance of deciduous shrubs with future climate warming will promote carbon storage, because of their relatively large allocation to woody stems that decompose slowly. Changes in moss abundance will also have important consequences for future carbon and nitrogen cycling, since moss litter is extremely recalcitrant and has a low potential to immobilize nitrogen.

[1]  G. Shaver.  Plant functional types and ecosystem change in arctic tundras , 1997 .

[2]  F. Chapin,et al.  Physiological and Growth Responses of Arctic Plants to a Field Experiment Simulating Climatic Change , 1996 .

[3]  F. Stuart Chapin,et al.  Responses of Arctic Tundra to Experimental and Observed Changes in Climate , 1995 .

[4]  C. Johnston,et al.  Environmental and substrate controls over carbon and nitrogen mineralization in northern wetlands , 1995 .

[5]  F. Hu,et al.  Arctic Tundra Biodiversity: A Temporal Perspective from Late Quaternary Pollen Records , 1995 .

[6]  F. Chapin,et al.  Causes and Consequences of Plant Functional Diversity in Arctic Ecosystems , 1995 .

[7]  S. Hobbie.  Direct and Indirect Effects of Plant Species on Biogeochemical Processes in Arctic Ecosystems , 1995 .

[8]  T. Callaghan,et al.  Differential growth, allocation and photosynthetic responses of Polygonum viviparum to simulated environmental change at a high arctic polar semi-desert , 1994 .

[9]  T. Callaghan,et al.  Growth responses of four sub-Arctic dwarf shrubs to simulated environmental change , 1994 .

[10]  W. Oechel,et al.  Mid- to late-Holocene carbon balance in Arctic Alaska and its implications for future global warming , 1993 .

[11]  T. Callaghan,et al.  COMPARATIVE RESPONSES OF PHENOLOGY AND REPRODUCTIVE DEVELOPMENT TO SIMULATED ENVIRONMENTAL-CHANGE IN SUB-ARCTIC AND HIGH ARCTIC PLANTS , 1993 .

[12]  James F. Reynolds,et al.  Arctic ecosystems in a changing climate : an ecophysiological perspective , 1993 .

[13]  T. Callaghan,et al.  Differential Growth Responses of Cassiope tetragona, an Arctic Dwarf-Shrub, to Environmental Perturbations among Three Contrasting High- and Subarctic Sites , 1993 .

[14]  S. Hobbie.  Effects of plant species on nutrient cycling. , 1992, Trends in ecology & evolution.

[15]  Edward B. Rastetter,et al.  Global Change and the Carbon Balance of Arctic EcosystemsCarbon/nutrient interactions should act as major constraints on changes in global terrestrial carbon cycling , 1992 .

[16]  S. Jonasson.  Plant responses to fertilization and species removal in tundra related to community structure and clonality. , 1992 .

[17]  G. Shaver,et al.  9 – Phenology, Resource Allocation, and Growth of Arctic Vascular Plants , 1992 .

[18]  Steven F. Oberbauer,et al.  10 – The Ecosystem Role of Poikilohydric Tundra Plants , 1992 .

[19]  L. Hinzman,et al.  3 – Arctic Hydrology and Climate Change , 1992 .

[20]  Barrie Maxwell,et al.  2 – Arctic Climate: Potential for Change under Global Warming , 1992 .

[21]  Knute J. Nadelhoffer,et al.  13 – Microbial Processes and Plant Nutrient Availability in Arctic Soils , 1992 .

[22]  F. Berendse,et al.  Nitrogen mineralization in heathland ecosystems dominated by different plant species , 1992 .

[23]  A. W. Damman,et al.  Species-controlled Sphagnum decay on a South Swedish raised bog , 1991 .

[24]  E. Gorham.  Northern Peatlands: Role in the Carbon Cycle and Probable Responses to Climatic Warming. , 1991, Ecological applications : a publication of the Ecological Society of America.

[25]  F. Chapin,et al.  Production: Biomass Relationships and Element Cycling in Contrasting Arctic Vegetation Types , 1991 .

[26]  K. Nadelhoffer,et al.  EFFECTS OF TEMPERATURE AND SUBSTRATE QUALITY ON ELEMENT MINERALIZATION IN SIX ARCTIC SOILS , 1991 .

[27]  K. Nadelhoffer,et al.  Biogeochemical Diversity Along a Riverside Toposequence in Arctic Alaska , 1991 .

[28]  T. Painter.  Lindow man, tollund man and other peat-bog bodies: The preservative and antimicrobial action of Sphagnan, a reactive glycuronoglycan with tanning and sequestering properties , 1991 .

[29]  B. Berg,et al.  Decomposition and nutrient dynamics of litter in long‐term optimum nutrition experiments , 1991 .

[30]  J. Verhoeven,et al.  Nitrogen and phosphorus mineralization in fens and bogs. , 1990 .

[31]  L. Ovenden.  Peat Accumulation in Northern Wetlands , 1990, Quaternary Research.

[32]  M. G. Ryan,et al.  A comparison of methods for determining proximate carbon fractions of forest litter , 1990 .

[33]  E. Paul,et al.  Soil microbiology and biochemistry. , 1998 .

[34]  D. Lashof.  The dynamic greenhouse: Feedback processes that may influence future concentrations of atmospheric trace gases and climatic change , 1989 .

[35]  F. Chapin,et al.  Productivity and Nutrient Cycling of Alaskan Tundra: Enhancement by Flowing Soil Water , 1988 .

[36]  A. W. Damman.  Regulation of nitrogen removal and retention in Sphagnum bogs and other peatlands , 1988 .

[37]  M. Ohlson.  Spatial variation in decomposition rate of Carex rostrata leaves on a Swedish mire , 1987 .

[38]  E. Nambiar.  Do nutrients retranslocate from fine roots , 1987 .

[39]  W. D. Billings.  CARBON BALANCE OF ALASKAN TUNDRA AND TAIGA ECOSYSTEMS: PAST, PRESENT AND FUTURE , 1987 .

[40]  F. Chapin,et al.  SEASONAL CHANGES IN CARBON FRACTIONS IN ALASKAN TUNDRA PLANTS OF DIFFERING GROWTH FORM: IMPLICATIONS FOR HERBIVORY , 1986 .

[41]  F. Chapin,et al.  Effect of Fertilizer on Production and Biomass of Tussock Tundra, Alaska, U.S.A. , 1986 .

[42]  G. Shaver.  Woody Stem Production in Alaskan Tundra Shrubs , 1986 .

[43]  F. Chapin,et al.  FACTORS LIMITING SEASONAL GROWTH AND PEAK BIOMASS ACCUMULATION IN ERIOPHORUM VAGINATUM IN ALASKAN TUSSOCK TUNDRA , 1986 .

[44]  F. Stuart Chapin,et al.  Individualistic Growth Response of Tundra Plant Species to Environmental Manipulations in the Field , 1985 .

[45]  J. Aber,et al.  Forest Litter Decomposition in Relation to Soil Nitrogen Dynamics and Litter Quality , 1985 .

[46]  D. Hopkins,et al.  Paleoecology of Beringia. , 1984 .

[47]  S. Hurlbert.  Pseudoreplication and the Design of Ecological Field Experiments , 1984 .

[48]  K. Cleve,et al.  Nutrient cycling in relation to decomposition and organic-matter quality in taiga ecosystems , 1983 .

[49]  S. Jonasson.  Nutrient content and dynamics in north Swedish shrub tundra areas , 1983 .

[50]  G. E. Lang,et al.  A Critique of the Analytical Methods Used in Examining Decomposition Data Obtained From Litter Bags , 1982 .

[51]  B. Berg,et al.  Accumulation and release of plant nutrients in decomposing Scots pine needle litter. Long-term decomposition in a Scots pine forest II , 1982 .

[52]  John F. Muratore,et al.  Nitrogen and Lignin Control of Hardwood Leaf Litter Decomposition Dynamics , 1982 .

[53]  R. Ekman,et al.  Age-dependent content of polymerized lipids in Sphagnum fuscum , 1982 .

[54]  R. S. Clymo,et al.  The Ecology of Sphagnum , 1982 .

[55]  D. McKey,et al.  A comparative study of the phytochemistry of two African Rain Forests , 1980 .

[56]  F. S. Chapin,et al.  Response to fertilization by various plant growth forms in an Alaskan tundra: nutrient accumulation and growth , 1980 .

[57]  J. Coulson,et al.  AN INVESTIGATION OF THE BIOTIC FACTORS DETERMINING THE RATES OF PLANT DECOMPOSITION ON BLANKET BOG , 1978 .

[58]  M. J. Effland.  Modified procedure to determine acid-insoluble lignin in wood and pulp. , 1977 .

[59]  P. Flanagan,et al.  Soil Organisms and Decomposition in Tundra. , 1975 .

[60]  J. B. Kenworthy,et al.  Chemical Analysis of Ecological Materials. , 1976 .

[61]  G. Likens,et al.  Nutrient Release From Decomposing Leaf and Branch Litter in the Hubbard Brook Forest, New Hampshire , 1973 .

[62]  S. J. Smith,et al.  Nitrogen Mineralization Potentials of Soils , 1972 .

[63]  F. Smith,et al.  COLORIMETRIC METHOD FOR DETER-MINATION OF SUGAR AND RELATED SUBSTANCE , 1956 .

[64]  D. A. V. Schreven,et al.  Mineralization of Organic Nitrogen in Soil , 1955 .