Date: 08 Mar 2008
Woody Plant Encroachment by Juniperus virginiana in a Mesic Native Grassland Promotes Rapid Carbon and Nitrogen Accrual
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The cover and abundance of Juniperus virginiana L. in the U.S. Central Plains are rapidly increasing, largely as a result of changing land-use practices that alter fire regimes in native grassland communities. Little is known about how conversion of native grasslands to Juniperus-dominated forests alters soil nutrient availability and ecosystem storage of carbon (C) and nitrogen (N), although such land-cover changes have important implications for local ecosystem dynamics, as well as regional C and N budgets. Four replicate native grasslands and adjacent areas of recent J. virginiana encroachment were selected to assess potential changes in soil N availability, leaf-level photosynthesis, and major ecosystem C and N pools. Net N mineralization rates were assessed in situ over two years, and changes in labile soil organic pools (potential C and N mineralization rates and microbial biomass C and N) were determined. Photosynthetic nitrogen use efficiencies (PNUE) were used to examine differences in instantaneous leaf-level N use in C uptake. Comparisons of ecosystem C and N stocks revealed significant C and N accrual in both plant biomass and soils in these newly established forests, without changes in labile soil N pools. There were few differences in monthly in situ net N mineralization rates, although cumulative annual net N mineralization was greater in forest soils compared to grasslands. Conversely, potential C mineralization was significantly reduced in forest soils. Encroachment by J. virginiana into grasslands results in rapid accretion of ecosystem C and N in plant and soil pools with little apparent change in N availability. Widespread increases in the cover of woody plants, like J. virginiana, in areas formerly dominated by graminoid species suggest an increasing role of expanding woodlands and forests as regional C sinks in the central U.S.
Albani M, Medvigy D, Hurtt GC, Moorcroft PR. 2006. The contribution of land-use change, CO2 fertilization, and climate variability to the Eastern US carbon sink. Glob Change Biol 12:2370–90.CrossRef
Archer SR, Boutton TW, Hibbard KA. 2001. Trees in grasslands: biogeochemical consequences of woody plant expansion. In: Schulze ED, Harrison S, Heimann M, Holland E, Lloyd J, Prentice I, Schimel D, Eds. Global biogeochemical cycles in the climate system. San Diego: Academic Press. pp 115–38.CrossRef
Arrouay D, Balesdent JB, Mariotti A, Girardin C. 1995. Modeling organic carbon turnover in cleared temperate forest soils converted to maize cropping using 13C natural abundance measurements. Plant Soil 173:191–6.CrossRef
Balesdent J, Wagner GH, Mariotti A. 1988. Soil organic matter turnover in long-term field experiments as revealed by carbon-13 natural abundance. Soil Sci Soc Am J 52:118–24.CrossRef
Bark D. 1987. Konza Prairie Research Natural Area, Kansas. The climates of the long-term ecological research sites. In Greenland D, Ed. Institute of Artic and Alpine research, occasional paper number 44. Colorado: University of Colorado. pp 45–50.
Bates JD, Svejcar TJ, Miller RF. 2002. Effects of juniper cutting on nitrogen mineralization. J Arid Environ 51:221–34.CrossRef
Blair JM. 1997. Fire, N availability, and plant response in grasslands: a test of the transient maxima hypothesis. Ecology 78:2359–68.
Blair JM, Seastedt TR, Rice CW, Ramundo RA. 1998. Terrestrial nutrient cycling in tallgrass prairie. In: Knapp AK, Briggs JM, Hartnett DC, Collins SL, Eds. Grassland dynamics: long term ecological research in Tallgrass Prairie. New York: Oxford University Press. pp 222–43.
Bradley BA, Houghton RA, Mustard JF, Hamburg SP. 2006. Invasive grass reduced aboveground carbon stocks in shrublands of the western US. Glob Change Biol 12:1815–22.CrossRef
Briggs JM, Hoch GH, Johnson LC. 2002. Assessing the rate, mechanisms, and consequences of the conversion of tallgrass prairie to Juniperus virginiana forest. Ecosystems 5:578–86.CrossRef
Briggs JM, Knapp AK, Blair JM, Heisler JL, Hoch GA, Lett MS, McCarron JK. 2005. An ecosystem in transition: woody plant expansion into mesic grassland. Bioscience 55:2245–57.CrossRef
Cairns MA, Brown S, Helmer EH, Baumgarder GA. 1997. Root biomass allocation in the world’s upland forests. Oecologia 111:1–11.CrossRef
Escudero A, Mediavilla S. 2003. Decline in photosynthetic nitrogen use efficiency with leaf age and nitrogen resorption as determinants of leaf life span. J Ecol 91:880–9.CrossRef
Field F, Mooney HA. 1983. The photosynthesis-nitrogen relationship in wild plants. In: Givnish TJ, Ed. On the economy of plant form and function: proceedings of the sixth Maria Moors Cabot Symposium, evolutionary constraints on primary productivity, adaptive patterns of energy capture in plants. Harvard Forest: Cambridge University Press. pp 25–55.
Field CB, Behrenfeld MJ, Randerson JT, Falkowski P. 1998. Primary production of the biosphere: integrating terrestrial and oceanic components. Science 281:237–240
Fowells HA. 1965. Silvics of forest trees of the United States, agriculture handbook No. 271. Washington DC: United States Department of Agriculture.
Garcia FO, Rice CW. 1994. Microbial biomass dynamics in tallgrass prairie. Soil Sci Soc Am J 47:945–51.
Grünzweig JM, Gelgfand I, Fried Y, Yakir D. 2007. Biogeochemical factors contributing to enhanced carbon storage following afforestation of a semi-arid shrubland. Biogeosciences 4:891–904.
Hibbard KA, Archer SR, Schimel DS, Valentine DW. 2001. Biogeochemical changes accompanying woody plant encroachment in a subtropical savanna. Ecology 82:1999–2001.
Horwarth WR, Paul EA. 1994. Microbial biomass. In: Weaver RW, Angle S, Bottomley P, Bezdicek D, Smith S, Tabatabai A, Wollum A, Eds. Methods of soil analysis part 2. Madison: Soil Science Society of America. pp 753–73.
Hughes RF, Archer SR, Asner GP, Wessman CA, McMurtry C, Nelson J, Ansley RJ. 2006. Changes in aboveground primary production and carbon and nitrogen pools accompanying woody plant encroachment in a temperate savanna. Glob Change Biol 12:1733–47.CrossRef
Jenkinson DS, Powlson DS. 1976. The effects of biocide treatments on metabolism in soil – V. A method for measuring soil biomass. Soil Biol Biochem 8:209–13.CrossRef
Johnson LC, Matchett JR. 2001. Fire and grazing regulate belowground processes in tallgrass prairie. Ecology 82:3377–89.CrossRef
Klemmedson JO, Tiedemann AR. 2000. Influence of western juniper development on distribution of soil and organic layer nutrients. Northwest Sci 74:1–11.
Knapp AK, Briggs JM, Blair JM, Turner CL. 1998. Patterns and controls of aboveground net primary production in tallgrass prairie. In: Knapp AK, Briggs JM, Hartnett DC, Collins SL, Eds. Grassland dynamics: long term ecological research in tallgrass prairie. New York: Oxford University Press. pp 193–221.
Knapp AK, McCarron JK, Silletti AM, Hoch GA, Heisler JL, Lett MS, Blair JM, Briggs JM, Smith MD. 2008. Ecological consequences of the replacement of native grassland by Juniperus virginiana and other woody plants. In: Van Auken OW, Ed. Western North American Juniperus communities: a dynamic vegetation type. New York: Springer-Verlag New York. pp 156–69.
Liao JD, Boutton TW, Jastrow JD. 2006. Storage and dynamics of carbon and nitrogen in soil physical fraction following woody plant invasion of grassland. Soil Biol Biochem 38:3184–96.CrossRef
McClaugherty C, Berg B. 1987. Cellulose, lignin and nitrogen concentrations as rate regulating factors in late stages of forest litter decomposition. Pedobiologia 30:101–12.
McKinley DC, Norris MD, Blair JM, Johnson LC. 2008. Altered ecosystem processes as a consequence of Juniperus virginiana L. encroachment into North America tallgrass prairie. In: Van Auken OW, Ed. Western North American Juniperus communities: a dynamic vegetation type. New York: Springer-Verlag New York. pp 170–87.
Miller RF, Eddleman LE, Angell RF. 1987. Relationship of western juniper stem conducting tissue and basal circumference to leaf area and biomass. Great Basin Nat 47:349–54.
Miller PM, Eddleman LE, Kramer PJ. 1990. Allocation patterns of carbon and minerals in juvenile and small-adult Juniperus occidentalis. Forest Sci 36:734–46.
Moiser AR. 2001. Exchange of gaseous nitrogen compounds between agricultural systems and the atmosphere. Plant Soil 228:17–27.CrossRef
Norris MD. 2000. Biogeochemical consequences of land cover change in eastern Kansas. Manhattan: Kansas State University. 112 pp.
Norris MD, Blair JM, Johnson LC. 2007. Altered ecosystem nitrogen dynamics as a consequence of land cover change in tallgrass prairie. Am Midland Nat 158:432–45.CrossRef
Norris MD, Blair JM, Johnson LC, McKane RB. 2001a. Assessing changes in biomass, productivity, and C and N stores following Juniperus virginiana forest expansion into tallgrass prairie. Can J Forest Res 31:1940–6.CrossRef
Norris MD, Blair JM, Johnson LC. 2001b. Land cover change in eastern Kansas: litter dynamics of closed-canopy eastern redcedar forests in tallgrass prairie. Can J Bot 79:214–22.CrossRef
Ojima DS, Schimel DS, Parton WJ, Owensby CE. 1994. Long-term and short-term effects of fire on nitrogen cycling in tallgrass prairie. Biogeochemistry 24:67–84.CrossRef
Pacala SW, Hurtt GC, Baker D, Peylin P, Houghton RA, Birdsey RA, Heath L, Sundquist ET, Stallard RF, Ciais P, Moorcroft P, Caspersen JP, Shevliakova E, Moore B, Kohlmaier G, Holland E, Gloor M, Harmon ME, Fan S-M, Sarmiento JL, Goodale CL, Schimel D, Field CB. 2001. Consistent land and atmosphere-based US carbon sink estimates. Science 292:2316–20.PubMedCrossRef
Schmidt TL, Leatherberry EC. 1995. Expansion of eastern juniper in the lower Midwest. Natl J Am Forest 12:180–3.
Scholes RJ, Archer SR. 1997. Tree-grass interactions in savannas. Annu Rev Ecol Syst 28:517–44.CrossRef
Scott NA, Binkley D. 1997. Foliage litter quality and annual net N mineralization: comparison across North American forest sites. Oecologia 111:151–9.CrossRef
Seastedt TR, Ramundo RA. 1990. The influence of fire on belowground processes of tallgrass prairies. In: Collins SL, Wallace LL, Eds. Fire in North American tallgrass prairies. Norman Oklahoma: University of Oklahoma Press. pp 99–117.
Smith DL, Johnson LC. 2003. Expansion of Juniperus virginiana L. in the Great Plains: changes in soil organic carbon dynamics. Glob Biogeochem Cycle 17:1–12.CrossRef
Smith DL, Johnson LC. 2004. Vegetation-mediated changes in microclimate reduce soil respiration as woodlands expand into grasslands. Ecology 85:3348–61.CrossRef
Throop HL, Archer SR. 2007. Interrelationships among shrub encroachment, land management, and litter decomposition in a semiarid grassland. Ecol Appl 17:1809–1823
Tiedemann AR, Klemmedson JO. 2000. Biomass and nutrient distribution and system nutrient budget for western juniper in central Oregon. Northwest Sci 74:12–24
Tilman D, Reich P, Phillips H, Menton M, Patel A, Vos E, Peterson D, Knops J. 2000. Fire suppression and ecosystem carbon storage. Ecology 81:2680–5.
Van Auken OW. 2000. Shrub invasions of North American semiarid grasslands. Annu Rev Ecol Syst 31:197–215.CrossRef
- Woody Plant Encroachment by Juniperus virginiana in a Mesic Native Grassland Promotes Rapid Carbon and Nitrogen Accrual
Volume 11, Issue 3 , pp 454-468
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- Juniperus virginiana
- woody plant encroachment
- grassland conversion
- nitrogen cycling
- nitrogen use efficiency
- carbon storage
- land cover change