The effects of gap disturbance on nitrogen cycling and retention in late-successional northern hardwood–hemlock forests
Tóm tắt
Late-successional forests in the upper Great Lakes region are susceptible to nitrogen (N) saturation and subsequent nitrate (NO
3
−
) leaching loss. Endemic wind disturbances (i.e., treefall gaps) alter tree uptake and soil N dynamics; and, gaps are particular susceptible to NO
3
−
leaching loss. Inorganic N was measured throughout two snow-free periods in throughfall, forest floor leachates, and mineral soil leachates in gaps (300–2,000 m2, 6–9 years old), gap-edges, and closed forest plots in late-successional northern hardwood, hemlock, and northern hardwood–hemlock stands. Differences in forest water inorganic N among gaps, edges, and closed forest plots were consistent across these cover types: NO
3
−
inputs in throughfall were significantly greater in undisturbed forest plots compared with gaps and edges; forest floor leachate NO
3
−
was significantly greater in gaps compared to edges and closed forest plots; and soil leachate NO
3
−
was significantly greater in gaps compared to the closed forest. Significant differences in forest water ammonium and pH were not detected. Compared to suspected N-saturated forests with high soil NO
3
−
leaching, undisturbed forest plots in these late-successional forests are not losing NO
3
−
(net annual gain of 2.8 kg ha−1) and are likely not N-saturated. Net annual NO
3
−
losses were observed in gaps (1.3 kg ha−1) and gap-edges (0.2 kg ha−1), but we suspect these N leaching losses are a result of decreased plant uptake and increased soil N mineralization associated with disturbance, and not N-saturation.
Tài liệu tham khảo
Aber JD (1992) Nitrogen cycling and nitrogen saturation in temperate forest ecosystems. Trends Ecol Evol 7:220–223
Aber JD, Nadelhoffer KJ, Steudler P, Melillo JM (1989) Nitrogen saturation in northern forest ecosystems. BioScience 3:378–386
Aber JD, Magill A, McNulty SG, Boone RD, Nadelhoffer KJ, Downs M, Hallett R (1995) Forest biogeochemistry and primary production altered by nitrogen saturation. Water Air Soil Pollut 85:1665–1670
Agren GI, Bosatta E (1988) Nitrogen saturation of the terrestrial ecosystem. Environ Pollut 54:185–197
Bauhus J, Bartsch N (1995) Mechanisms for carbon and nutrient release and retention in beech forest gaps. I. Microclimate, water balance and seepage water chemistry. Plant Soil 168–169:579–584
Bockheim JG (2003) Genesis of bisequal soils on acidic drift in the Upper Great Lakes region, USA. Soil Sci Soc Am J 67:612–619
Brooks P, Williams MW, Schmidt SK (1998) Inorganic nitrogen and microbial biomass dynamics before and during spring snowmelt. Biogeochemistry 43:1–15
Bruijnzeel LA (1991) Nutrient input-outpur budgets of tropical forest ecosystems: a review. J Trop Ecol 7:1–24
Brumme R (1995) Mechanisms of carbon and nutrient release and retention in beech forest gaps. Plant Soil 168–169:593–600
Campbell DH, Clow DW, Ingersoll GP, Mast MA, Spahr NE, Turk JT (1995) Processes controlling the chemistry of two snowmelt-dominated streams in the Rocky Mountains. Water Resour Res 31:2811–2821
Canham CD, Loucks OL (1984) Catastrophic wind-throw in the presettlement forests of Wisconsin. Ecology 65:803–809
Curtis JT (1959) The vegetation of Wisconsin. University of Wisconsin Press, Madison
Dahir SE, Lorimer CG (1996) Variation in canopy gap formation among developmental stages of northern hardwood stands. Can J For Res 26:1875–1892
Davis MR, Calcote RR, Sugita S, Takahura H (1998) Patch invasion and origin of a hemlock-hardwoods forest mosaic. Ecology 79:2641–2659
Denslow JS, Ellison AM, Sanford RE (1998) Treefall gap size effects on above- and below-ground processes in a tropical wet forest. J Ecol 86:597–609
Dise NB, Wright RF (1995) Nitrogen leaching from European forests in relation to nitrogen deposition. For Ecol Manage 71:153–161
Drinkwater LE, Cambardella CA, Reeder J, Rice CW (1996) Potentially mineralizable nitrogen as an indicator of biologically active soil nitrogen. In: Doran JW, Jones AJ (eds) Methods for assessing soil quality. Soil Sci Soc, Madison
Eaton JS, Likens GE, Bormann FH (1973) Throughfall and stemflow chemistry in a northern hardwood forest. J Ecol 61:495–508
Fenn ME, Poth MA, Aber JD, Baron JS, Bormann BT, Johnson DW, Lemly AD, McNulty SG, Ryan DF, Stottlemyer R (1998) Nitrogen excess in North American ecosystems: predisposing factors, ecosystem responses, and management strategies. Ecol Appl 8:705–733
Foster NW, Nicolson JA, Hazlett PW (1989) Temporal variation in nitrate and nutrient cations in drainage waters from a deciduous forest. J Environ Qual 18:238–244
Frelich LE, Lorimer CG (1991) Natural disturbance regimes in hemlock-hardwood forests of the upper Great Lakes region. Ecol Monogr 61:145–161
Frelich LE, Calcote RR, Davis MB (1993) Patch formation and maintenance in an old-growth hemlock hardwood forest. Ecology 74:513–527
Goodburn JM, Lorimer CG (1999) Population structure in old-growth and managed northern hardwoods: an examination of the balanced diameter distribution concept. For Ecol Manage 118:11–29
Gorham E, Vitousek PM, Reiners WA (1979) The regulation of chemical budgets over the course of terrestrial ecosystem succession. Ann Rev Ecol Syst 10:53–84
Gundersen P, Rasmussen L (1990) Nitrification in forest soils: effects of nitrogen deposition on soil acidification and aluminium release. Rev Environ Contam Toxicol 13:1–45
Gundersen P, Schmidt IK, Raulund-Ramussen K (2006) Leaching of nitrate from temperate forests – effects of air pollution and forest management. Environ Rev 14:1–57
Hedin LO, Armesto JJ, Johnson AH (1995) Patterns of nutrient loss from unpolluted, old-growth temperate forests: evaluation of biogeochemical theory. Ecology 76:493–509
Johnson DW, Lindberg SE (1992) Atmospheric deposition and forest nutrient cycling. Ecological Studies Series 91, Springer-Verlag, New York
Jordan CF (1968) A simple, tension-free lysimeter. Soil Sci 105:81–86
Lesack LFW, Melack JM (1996) Mass balance of major solutes in a rainforest catchments in the Central Amazon: implications for nutrient budgets in tropical rainforests. Biogeochemistry 32:115–142
Likens GE, Bormann FH (1995) Biogeochemistry of a forested ecosystem. Springer-Verlag, New York
Lindberg SE, Owens JG (1993) Throughfall studies of deposition to forest edges and gaps in montane ecosystems. Biogeochemistry 19:173–194
Lindberg SE, Hariss RC, Turner RR, Shriner DS, Huff DD (1979) Mechanisms and rates of atmospheric deposition of selected trace elements and sulfate to a deciduous forest watershed. Oak Ridge National Lab Environmental Sciences Division Publ. No. 1299 ORNL/TM 6674
MacDonald NW, Burton AJ, Liechty HO, Witter JA, Pregitzer KS, Mroz GD, Richter DD (1992) Ion leaching in forest ecosystems along a Great Lakes air pollution gradient. J Environ Qual 21:614–623
McClure JW, Lee TD, Leak WB (2000) Gap capture in northern hardwoods: patterns of establishment an height growth in four species. For Ecol Manage 127:181–189
McDowell WH, Likens GE (1988) Origin, composition, and flux of dissolved organic carbon in the Hubbard Brook Valley. Ecol Monogr 58:177–195
McNulty SG, Aber JD, Boone RD (1991) Spatial changes in forest floor and foliar chemistry of spruce-fir forests across New England. Biogeochemistry 14:13–29
Michalzik B, Dorsch T, Matzner E (1997) Stability of dissolved organic nitrogen and mineral nitrogen in bulk precipitation and throughfall. Z Pflanzenernährung Bodenkunde 160:433–434
Mladenoff DJ (1987) Dynamics of nitrogen mineralization and nitrification in hemlock and hardwood treefall gaps. Ecology 68:1171–1180
National Atmospheric Deposition Program (NADP) (2007) Annual data summary for Houghton County, Chassel station MI99, http://www.nadp.sws.uiuc.edu/sites/siteinfo.asp?net=NTN&id=MI99, 12 Apr 2007
National Oceanic and Atmospheric Administration (NOAA) (2007) Climatological data national summary. Environmental Data Service National Climatic Center, North Carolina. Big Bay 8 NW at 46°53’N and 87°52’W and Ontonagon 6 SE at 46°50’N and 89°12’W, http://www.ncdc.noaa.gov/oa/climate/stationlocator.html, 03 Feb 2007
Oakton pH/CON 510 Series Multiparameter Meters, Fisher Scientific
Onset Computer Corporation (2003) Pocasset, Massachusetts
Palik BJ, Pregitzer KS (1992) A comparison of pre-settlement and present-day forests on two big tooth aspen-dominated landscapes in northern lower Michigan. Am Midl Nat 127:327–338
Parker GG (1983) Throughfall and stemflow in the forest nutrient cycle. Adv Ecol Res 13:57–133
Parsons WFJ, Knight DH, Miller SL (1994a) Root gap dynamics and forest disturbance theory in lodgepole pine forests: nitrogen transformations in gaps of different size. Ecol Appl 4:354–362
Parsons WFJ, Knight DH, Miller SL (1994b) Root gap dynamics in lodgepole pine forests: ectomycorrhizal and nonmycorrhizal fine root activity after experimental gap formation. Can J For Res 24:1531–1538
Pastor J, Broschat M (1990) The spatial pattern of a northern confier hardwood landscape. Landsc Ecol 4:55–68
Phillips DW, McCulloch JAW (1972) The climate of the Great Lakes Basin. Climatological Studies Number 20. Atmospheric Environment Service Environment Canada, Toronto
Prescott CE, Hope GD, Blevins LL (2003) Effect of gap size on litter decomposition and soil nitrate concentrations in a high-elevation spruce-fir forest. Can J For Res 33:2210–2220
Qualls RG, Haines BL, Swank WT, Tyler SW (2000) Soluble organic and inorganic nutrient fluxes in clearcut and mature deciduous forests. Soil Sci Soc Am J 64:1068–1077
Ritter E, Vesterdal L (2006) Gap formation in Danish beech (Fagus sylvatica L.) forests of low management intensity: soil moisture and nitrate in soil solution. Eur J For Res 125:139–150
Ritter E, Starr M, Vesterdal L (2005) Losses of nitrate from gaps of different sizes in a managed beech (Fagus sylvatica) forest. Can J For Res 35:308–319
Runkle JR (1992) Guidelines and sample protocol for sampling forest gaps. General Techniques Reproduction PNW GTR 283 U.S. Department of Agriculture, Forest Service, Pacific Northwest Resource Station
SAS Institute (2005) JMP Ver 6. SAS Institute Inc. North Carolina
Scharenbroch BC, Bockheim JG (2007) Impacts of forest gaps on soil properties and processes in old growth northern hardwood-hemlock forests. Plant Soil 294:219–233
Seymour RS, White AS, deMaynadier PG (2002) Natural disturbance regimes in northeastern North America: evaluating silvicultural systems using natural scales and frequencies. For Ecol Manage 155:357–367
Sims GK, Ellsworth TR, Mulvaney RL (1995) Microscale determination of inorganic nitrogen in water and soil extracts. Commun Soil Sci Plant Anal 26:303–316
Soil Moisture Corportation (2007) Soil water sampler #1900. Goleta, California, USA
Starr M (1999) WATBAL: a model for estimating monthly water balance components, including soil water fluxes. In: Kleemola S, Forsius M (eds) 8th annual report 1999 UN ECE ICP integrated monitoring, the Finnish environment 325, Finnish Environment Institute, Helsinki, Finland, pp 31–35
Tyrrell LE, Crow TR (1994) Structural characteristics of old-growth hemlock-hardwood forests in relation to age. Ecology 75:370–386
United States Department of Agriculture, National Resources Conservation Service (USDA NRCS) (2006) Keys to soil taxonomy, 10th edn. National Cooperative Soil Survey, Madison, WI
Van Miegroet H, Cole DW, Foster NW (1992) Nitrogen chemistry, deposition, and cycling in forests: summary and conclusions. In: Johnson DW, Lindberg SE (eds) Atmospheric deposition and forest nutrient cycling. Ecological Studies 91, Springer-Verlag, New York
Vitousek PM, Reiners WA (1975) Ecosystem succession and nutrient retention: a hypothesis. BioScience 25:376–381
Vitousek PM, Gosz JR, Grier CC, Melillo JM, Reiners WA, Todd RL (1979) Nitrate losses from disturbed ecosystems. Science 204:469–474
Williams MW, Brooks PD, Moiser A, Tonnessen KA (1996) Mineral nitrogen transformations in and under seasonal snow in high-elevation catchment in the Rocky Mountains, United States. Water Resour Res 32:3161–3171
Woods KD (2000) Long-term change and spatial pattern in a late-successional hemlock-northern hardwood forest. J Ecol 88:267–282
Woods KD (2004) Intermediate disturbance in a late-successional hemlock-northern hardwood forest. J Ecol 92:464–476
Zak DR, Groffmann PM, Pregitzer KS, Christensen S, Tiedje JM (1990) The vernal dam: plant-microbe competition for nitrogen in northern hardwood forests. Ecology 71:651–656
Zhang Q, Zak JC (1995) Effects of gap size on litter decomposition and microbial activity in a subtropical forest. Ecology 76:2196–2204