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Herbivore effects on above- and belowground plant production and soil nitrogen availability in the Trans-Himalayan shrub-steppes

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Abstract

Large mammalian herbivores may have positive, neutral, or negative effects on annual net aboveground plant production (NAP) in different ecosystems, depending on their indirect effects on availability of key nutrients such as soil N. In comparison, less is known about the corresponding influence of grazers, and nutrient dynamics, over annual net belowground plant production (NBP). In natural multi-species plant communities, it remains uncertain how grazing influences relative allocation in the above- and belowground compartments in relation to its effects on plant nutrients. We evaluated grazer impacts on NAP, NBP, and relative investment in the above- and belowground compartments, alongside their indirect effects on soil N availability in the multiple-use Trans-Himalayan grazing ecosystem with native grazers and livestock. Data show that a prevailing grazing intensity of 51% increases NAP (+61%), but reduces NBP (−35%). Grazing also reduced C:N ratio in shoots (−16%) and litter (−50%), but not in roots, and these changes coincided with increased plant-available inorganic soil N (+23%). Areas used by livestock and native grazers showed qualitatively similar responses since NAP was promoted, and NBP was reduced, in both cases. The preferential investment in the aboveground fraction, at the expense of the belowground fraction, was correlated positively with grazing intensity and with improvement in litter quality. These results are consistent with hypothesized herbivore-mediated positive feedbacks between soil nutrients and relative investment in above- and belowground compartments. Since potentially overlapping mechanisms, such as N mineralization rate, plant N uptake, compositional turnover, and soil microbial activity, may contribute towards these feedbacks, further studies may be able to discern their respective contributions.

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References

  • Archer S, Tieszen LL (1983) Effects of simulated grazing on foliage and root production and biomass allocation in an arctic tundra sedge (Eriophorum vaginatum). Oecologia 58:92–102

    Article  Google Scholar 

  • Augustine DJ, McNaughton SJ (2006) Interactive effects of ungulate herbivores, soil fertility, and variable rainfall on ecosystem processes in a semi-arid savanna. Ecosystems 9:1242–1256

    Article  CAS  Google Scholar 

  • Bagchi S, Ritchie ME (2010) Introduced grazers can restrict potential soil carbon sequestration through impacts on plant community composition. Ecol Lett. doi:10.1111/j.1461-0248.2010.01486.x

  • Bagchi S, Ritchie ME (2010) Herbivory and plant tolerance: experimental tests of alternative hypotheses involving non-substitutable resources. Oikos (in press)

  • Bagchi S, Mishra C, Bhatnagar YV (2004) Conflicts between traditional pastoralism and conservation of Himalayan ibex (Capra sibirica) in the Trans-Himalayan mountains. Anim Conserv 7:121–128

    Article  Google Scholar 

  • Bagchi S, Namgail T, Ritchie ME (2006) Small mammalian herbivores as mediators of plant community dynamics in the high-altitude arid rangelands of Trans-Himalaya. Biol Conserv 127:438–442

    Article  Google Scholar 

  • Bardgett RD, Wardle DA, Yeates GW (1998) Linking above-ground and below-ground interactions: how plant responses to foliar herbivory influences soil organisms. Soil Biol Biochem 30:1867–1878

    Article  CAS  Google Scholar 

  • Binkley D, Matson P (1983) Ion exchange resin bag method for assessing forest soil N availability. Soil Sci Soc Am J 47:1050–1052

    Article  CAS  Google Scholar 

  • Biondini ME, Patton BD, Nyren PE (1998) Grazing intensity and ecosystem processes in a northern mixed-grass prairie, USA. Ecol Appl 8:469–479

    Article  Google Scholar 

  • Briske DD, Richards JH (1995) Plant responses to defoliation: A physiological, morphological and demographic evaluation. In: Bedunah DJ, Sosebee RE (eds) Wildland plants: physiological ecology and developmental morphology. Society for Range Management, Denver, pp 635–710

    Google Scholar 

  • Burnham KP, Anderson DR (2002) Model selection and multimodel inference: a practical information-theoretic approach. Springer, New York

    Google Scholar 

  • Cahill JF Jr (1999) Fertilization effects on interactions between above- and belowground competition in an old field. Ecology 80:466–480

    Article  Google Scholar 

  • Chapman SK, Hart SC, Cobb NS, Whitman TG, Koch GW (2003) Insect herbivory increases litter quality and decomposition: an extension of the acceleration hypothesis. Ecology 84:2867–2876

    Article  Google Scholar 

  • de Mazancourt C, Loreau M, Abbadie L (1998) Grazing optimization and nutrient cycling: when do herbivores enhance plant production? Ecology 79:2242–2252

    Article  Google Scholar 

  • DeAngelis DL (1992) Dynamics of nutrient cycling and food webs. Chapman and Hall, New York

    Google Scholar 

  • Derner JD, Boutton TW, Briske DD (2006) Grazing and ecosystem carbon storage in the North American Great Plains. Plant Soil 280:90

    Article  Google Scholar 

  • Dyer MI, DeAngelis DL, Post WM (1986) A model of herbivore feedback on plant productivity. Math Biosci 79:171–184

    Article  Google Scholar 

  • Frank DA, Groffman PM (1998) Ungulate vs. landscape control of soil C and N processes in grasslands of Yellowstone National Park. Ecology 79:2229–2241

    Article  Google Scholar 

  • Frank DA, Groffman PM (2009) Plant rhizosphere N processes: what we don’t know and why we should care. Ecology 90:1512–1519

    Article  PubMed  Google Scholar 

  • Frank DA, McNaughton SJ (1993) Evidence for the promotion of aboveground grassland production by native large herbivores in Yellowstone National Park. Oecologia 96:157–161

    Article  Google Scholar 

  • Frank DA, Kuns MM, Guido DR (2002) Consumer control of grassland plant production. Ecology 83:602–606

    Article  Google Scholar 

  • Gallardo A, Schlesinger WH (1992) Carbon and nitrogen limitations of soil microbial biomass in desert ecosystems. Biogeochemistry 18:1–17

    Article  CAS  Google Scholar 

  • Gao YZ, Giese M, Lin S, Sattelmacher B, Zhao Y, Brueck H (2008) Belowground net primary productivity and biomass allocation of a grassland in Inner Mongolia is affected by grazing intensity. Plant Soil 307:41–50

    Article  CAS  Google Scholar 

  • Hamilton EW, Frank DA (2001) Can plants stimulate soil microbes and their own nutrient supply? Evidence from a grazing tolerant grass. Ecology 82:2397–2402

    Article  Google Scholar 

  • Hamilton EW, Giovannini MS, Moses A, Coleman JS, McNaughton SJ (1988) Biomass and mineral element responses of a Serengeti short-grass species to nitrogen supply and defoliation: compensation requires a critical [N]. Oecologia 116:407–418

    Article  Google Scholar 

  • Hobbs NT (1996) Modification of ecosystems by ungulates. J Wildl Manage 60:695–713

    Article  Google Scholar 

  • Johnson LC, Matchett JR (2001) Fire and grazing regulate belowground processes in tallgrass prairie. Ecology 82:3377–3389

    Article  Google Scholar 

  • Klein JA, Harte J, Zhao XQ (2007) Experimental warming, not grazing, decreases rangeland quality on the Tibetan plateau. Ecol Appl 17:541–557

    Article  PubMed  Google Scholar 

  • Levin SA (1993) Forum: grazing theory and rangeland management. Ecol Appl 3:1

    Google Scholar 

  • Loreau M (1995) Consumers as maximizers of matter and energy flow in ecosystems. Am Nat 145:22–42

    Article  Google Scholar 

  • McNaughton SJ (1976) Serengeti migratory wildebeest: facilitation of energy flow by grazing. Science 191:92–94

    Article  CAS  PubMed  Google Scholar 

  • McNaughton SJ (1985) Ecology of a grazing ecosystem: the Serengeti. Ecol Monogr 53:259–294

    Article  Google Scholar 

  • McNaughton SJ, Milchunas DG, Frank DA (1996) How can net primary productivity be measured in grazing ecosystems? Ecology 77:974–977

    Article  Google Scholar 

  • McNaughton SJ, Banyikwa FF, McNaughton MM (1998) Root biomass and productivity in a grazing ecosystem: the Serengeti. Ecology 79:587–592

    Article  Google Scholar 

  • Milchunas DG (2009) Estimating root production: comparison of 11 methods in shortgrass steppe and review of biases. Ecosystems 12:1381–1402

    Article  CAS  Google Scholar 

  • Milchunas DG, Lauenroth WK (1993) Quantitative effects of grazing on vegetation and soils over a global range of environments. Ecol Monogr 63:327–366

    Article  Google Scholar 

  • Mishra C, van Wieren SE, Ketner P, Heitkonig IMA, Prins HHT (2004) Competition between livestock and bharal Pseudois nayaur in the Indian Trans-Himalaya. J Appl Ecol 41:344–354

    Article  Google Scholar 

  • Ni J (2004) Estimating net primary productivity of grasslands from field biomass measurements in temperate Northern China. Plant Ecol 174:217–234

    Article  Google Scholar 

  • Olff H, Ritchie ME, Prins HHT (2002) Global environmental determinants of diversity in large herbivores. Nature 415:901–905

    Article  CAS  PubMed  Google Scholar 

  • Pastor J, Dewey D, Naiman RJ, McInnes PF, Cohen Y (1993) Moose browsing and soil fertility in the boreal forests of Isle Royale National Park. Ecology 74:467–480

    Article  Google Scholar 

  • Ritchie ME, Tilman D, Knopps JMH (1998) Herbivore effects on plant nitrogen dynamics in oak savanna. Ecology 79:165–177

    Article  Google Scholar 

  • Robertson GP, Coleman DC, Bledsoe CS, Sollins P (1999) Standard soil methods for long-term ecological research. Oxford University Press, New York

    Google Scholar 

  • Ruess RW (1984) Nutrient movement and grazing: experimental effects of clipping and nitrogen source on nutrient uptake in Kyllinga nervosa. Oikos 43:183–188

    Article  CAS  Google Scholar 

  • Sala OE, Austin AT (2000) Methods of estimating aboveground net primary productivity. In: Sala OE, Jackson RB, Mooney HA, Howarth RW (eds) Methods in ecosystem science. Springer, New York, pp 31–43

    Google Scholar 

  • Sankaran M, Augustine DJ (2004) Large herbivores suppress decomposer abundance in a semiarid grazing ecosystem. Ecology 85:1052–1061

    Article  Google Scholar 

  • Schoenecker KA, Singer FJ, Zeigenfuss LC, Binkley D, Menezes RSC (2004) Effects of elk herbivory on vegetation and nitrogen processes. J Wildl Manage 68:837–849

    Article  Google Scholar 

  • Stark JM (2000) Nutrient transformation. In: Sala OE, Jackson RB, Mooney HA, Howath RW (eds) Methods in ecosystem science. Springer, New York, pp 215–234

    Google Scholar 

  • Strauss SY, Agrawal AA (1999) The ecology and evolution of plant tolerance to herbivory. Trends Ecol Evol 14:179–185

    Article  PubMed  Google Scholar 

  • Wilson SD, Tilman D (1991) Component of plant competition along an experimental gradient of nitrogen availability. Ecology 72:1050–1065

    Article  Google Scholar 

  • Wise MJ, Abrahamson WG (2005) Beyond the compensatory continuum: environmental resource levels and plant tolerance of herbivory. Oikos 109:417–428

    Article  Google Scholar 

  • Xu X, Ouyang H, Cao G, Pei Z, Zhou C (2004) Nitrogen deposition and carbon sequestration in alpine meadows. Biogeochemistry 71:353–369

    Article  CAS  Google Scholar 

  • Yang Y, Fang J, Ma W, Guo D, Mohammat A (2010) Large-scale pattern of biomass partitioning across China’s grasslands. Glob Ecol Biogeogr 19:268–277

    Article  Google Scholar 

Download references

Acknowledgments

This work was supported by the US National Science Foundation (DDIG DEB-0608287 to SB), Wildlife Conservation Society and Rufford Maurice Laing Foundation. We thank Himachal Pradesh Department of Forest Farming and Conservation for their support. Dorje “Sheroo” Chhewang, Tanzin “Mirinda” Chhewang, Tandup “Sushil” Dorje, Swapna N. Reddy, Tanzin Thinle, and several others from Kibber village provided generous assistance during field work. We benefited from discussions with Y. V. Bhatnagar, D. D. Briske, M. Dovciak, D. A. Frank, J. D. Fridley, M. V. Lomolino, C. Mishra, T. Namgail, W. T. Starmer and M.A. Thorne. Critiques by the editors and anonymous reviewers helped improve earlier drafts of the manuscript.

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Authors and Affiliations

  1. Department of Biology, Syracuse University, 107 College Place, Syracuse, NY, 13244, USA

    Sumanta Bagchi & Mark E. Ritchie

  2. Nature Conservation Foundation, 3076/5, 4th Cross, Gokulam Park, Mysore, Karnataka, 570002, India

    Sumanta Bagchi

  3. Department of Ecosystem Science and Management, Texas A&M University, 325 ANIN, 2138 TAMU, 77843, College Station, TX, USA

    Sumanta Bagchi

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  1. Sumanta Bagchi
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  2. Mark E. Ritchie
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Correspondence to Sumanta Bagchi.

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Communicated by Jason Kaye.

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Bagchi, S., Ritchie, M.E. Herbivore effects on above- and belowground plant production and soil nitrogen availability in the Trans-Himalayan shrub-steppes. Oecologia 164, 1075–1082 (2010). https://doi.org/10.1007/s00442-010-1690-5

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