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Plant and Soil

, Volume 393, Issue 1–2, pp 109–122 | Cite as

The effects of forest gaps on cellulose degradation in the foliar litter of two shrub species in an alpine fir forest

  • Wei He
  • Fuzhong Wu
  • Danju Zhang
  • Wanqin YangEmail author
  • Bo Tan
  • Yeyi Zhao
  • Qiqian Wu
Regular Article

Abstract

Aims

Forest gap manipulates the hydrothermal dynamics of the forest floor, creating heterogeneous microenvironments and controlling understory ecosystem processes. However, how the heterogeneity in environments from the gap center to the adjacent closed canopy affects foliar litter cellulose degradation is poorly understood.

Methods

Litterbags were used to examine the cellulose degradation over a 734-day period for the litter of two dominant shrubs from the gap center to the closed canopy in three alpine forest gaps of the eastern Qinghai-Tibet Plateau.

Results

The cellulose degradation of the two foliar litter species decreased from the gap center to the closed canopy during the two winters, the first year, the second year and the entire 2 years, whereas this trend reversed in the two growing seasons. Cellulose degradation of both litter species in the first winter and in the first year accounted for approximately 50 and 70 % of the 2 years of degradation, respectively. This degradation was positively related to average daily temperature and microbial biomass carbon but negatively related to the frequency of the freeze-thaw cycle.

Conclusions

Forest gaps promote the wintertime and annual cellulose degradation during shrub-litter decomposition. Moreover, reduced snow cover during gap vanishing as forests are regenerated or during winter warming may inhibit shrub litter cellulose degradation in high-latitude and -altitude ecosystems.

Keywords

Alpine forest Cellulose degradation Forest gap Shrub foliar litter Snow cover 

Abbreviations

AT

Average temperature

FFTC

Frequency of the freeze-thaw cycle

MANOVA

Multivariate analysis of variance

LOESS

Locally weighted scatterplot smoothing

SF1

The first snow-formation period

SC1

The first snow-cover period

ST1

The first snow-melting period

EG1

The first early growing season

LG1

The first later growing season

SF2

The second snow-formation period

SC2

The second snow-cover period

ST2

The second snow-melting period

EG2

The second early growing season

LG2

The second later growing season

Notes

Acknowledgments

We are grateful to Jianxiao Zhu for assistance with data analysis and two anonymous reviewers for constructive comments for improving the manuscript. This work was supported by the National Natural Science Foundation of China (31170423 31200474 and 31270498) and the Program of Sichuan Youth Sci-tech Foundation (Nos. 2012JQ0008 and 2012JQ0059).

Compliance with ethics statement

We certify that this article is original work and has never been published or under consideration for publication elsewhere totally or partly. No data have been fabricated or manipulated (including images) to support our conclusions. No data, text, or theories by others are presented as if they were our own. The submission has been received explicitly from all co-authors whose names appeared on the paper, and they have contributed sufficiently to the scientific work and therefore share collective responsibility and accountability for the results. We also declare that they have no conflict of interest. Informed consent was obtained from all individual participants included in this study. In addition, we had a permit from the Western Sichuan Forestry Bureau to conduct scientific experiments in the Miyaluo Nature Reserve since March 2006. Leaf litter collected for this study was only sampled at a very limited scale, and thus, had negligible effects on broader ecosystem functioning. Moreover, this research was carried out in compliance with the laws of People’s Republic of China. The research did not involve measurements on humans or animals and no endangered or protected plant species was involved.

References

  1. Aerts R (2006) The freezer defrosting: global warming and litter decomposition rates in cold biomes. J Ecol 94:713–724CrossRefGoogle Scholar
  2. Arunachalam A, Arunachalam K (2000) Influence of gap size and soil properties on microbial biomass in a subtropical humid forest of north-east India. Plant Soil 223:187–195CrossRefGoogle Scholar
  3. Baptist F, Yoccoz NG, Choler P (2010) Direct and indirect control by snow cover over decomposition in alpine tundra along a snowmelt gradient. Plant Soil 328:397–410CrossRefGoogle Scholar
  4. Berg B, McClaugherty C (2014) Plant litter. Decomposition, humus formation, carbon sequestration, Thirdth edn. Springer, BerlinGoogle Scholar
  5. Brooks PD, Williams MW, Schmidt SK (1996) Microbial activity under alpine snowpacks, Niwot Ridge, Colorado. Biogeochemistry 32:93–113CrossRefGoogle Scholar
  6. Campbell JL, Mitchell MJ, Groffman PM, Christenson LM, Hardy JP (2005) Winter in northeastern North America: a critical period for ecological processes. Front Ecol Environ 3:314–322CrossRefGoogle Scholar
  7. Cleveland CC, Reed SC, Keller AB, Nemergut DR, O’Neill SP, Ostertag R, Vitousek PM (2014) Litter quality versus soil microbial community controls over decomposition: a quantitative analysis. Oecologia 174:283–294PubMedCrossRefGoogle Scholar
  8. Cotrufo MF, Wallenstein MD, Boot CM, Denef K, Paul E (2013) The microbial efficiency-matrix stabilization (MEMS) framework integrates plant litter decomposition with soil organic matter stabilization: do labile plant inputs form stable soil organic matter? Glob Chang Biol 19:988–995Google Scholar
  9. DeMarco J, Mack MC, Bret-Harte MS (2014) Effects of arctic shrub expansion on biophysical versus biogeochemical drivers of litter decomposition. Ecology 95:1861–1875PubMedCrossRefGoogle Scholar
  10. Deng RJ, Yang WQ, Zhang J, Wu FZ (2010) Changes in litter quality of subalpine forests during one freeze - thaw season. Acta Ecol Sin 30:830–835 [in Chinese, English abstract]Google Scholar
  11. Freppaz M, Celi L, Marchelli M, Zanini E (2008) Snow removal and its influence on temperature and N dynamics in alpine soils (Vallee d’Aoste, northwest Italy). J Plant Nutr Soil Sci 171:672–680CrossRefGoogle Scholar
  12. Gavazov KS (2010) Dynamics of alpine plant litter decomposition in a changing climate. Plant Soil 337:19–32CrossRefGoogle Scholar
  13. Groffman PM, Driscoll CT, Fahey TJ, Hardy JP, Fitzhugh RD, Tierney GL (2001) Effects of mild winter freezing on soil nitrogen and carbon dynamics in a northern hardwood forest. Biogeochemistry 56:191–213CrossRefGoogle Scholar
  14. Groffman PM, Hardy JP, Fashu-Kanu S, Driscoll CT, Cleavitt NL, Fahey TJ, Fisk MC (2011) Snow depth, soil freezing and nitrogen cycling in a northern hardwood forest landscape. Biogeochemistry 102:223–238CrossRefGoogle Scholar
  15. Guo LB, Halliday MJ, Gifford RM (2006) Fine root decomposition under grass and pine seedlings in controlled environmental conditions. Appl Soil Ecol 33:22–29CrossRefGoogle Scholar
  16. He W, Wu FZ, Yang WQ, Wu QQ, He M, Zhao YY (2013) Effect of snow patches on leaf litter mass loss of two shrubs in an alpine forest. Chin J Plant Ecol 37:306–316 [in Chinese, English abstract]CrossRefGoogle Scholar
  17. Herrmann A, Witter E (2002) Sources of C and N contributing to the flush in mineralization upon freeze–thaw cycles in soils. Soil Biol Biochem 34:1495–1505CrossRefGoogle Scholar
  18. Hicks Pries CE, Schuur EAG, Vogel JG, Natali SM (2013) Moisture drives surface decomposition in thawing tundra. J Geophys Res 118:1133–1143Google Scholar
  19. Huang DL, Zeng GM, Feng CL, Hu S, Lai C, Zhao MH, Su FF, Tang L, Liu HL (2010) Changes of microbial population structure related to lignin degradation during lignocellulosic waste composting. Bioresour Technol 101:4062–4067PubMedCrossRefGoogle Scholar
  20. IPCC (2007) Climate change 2007. The physical science basis. Working Group I contribution to the IPCC Fourth Assessment Report, IPCC, GenevaGoogle Scholar
  21. IPCC (2014) Climate change 2013. The physical science basis. Working Group I Contribution to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University PressGoogle Scholar
  22. Klein JA, Harte J, Zhao XQ (2007) Experimental warming, not grazing, decreases rangeland quality on the Tibetan Plateau. Ecol Appl 17:541–557PubMedCrossRefGoogle Scholar
  23. Konestabo HS, Michelsen A, Holmstrup M (2007) Responses of springtail and mite populations to prolonged periods of soil freeze-thaw cycles in a sub-arctic ecosystem. Appl Soil Ecol 36:136–146CrossRefGoogle Scholar
  24. Kreyling J, Beierkuhnlein C, Pritsch K, Schloter M, Jentsch A (2008) Recurrent soil freeze–thaw cycles enhance grassland productivity. New Phytol 177:938–945PubMedCrossRefGoogle Scholar
  25. Kreyling J, Haei M, Laudon H (2013) Snow removal reduces annual cellulose decomposition in a riparian boreal forest. Can J Soil Sci 93:427–433CrossRefGoogle Scholar
  26. Kumar M, Khanna S (2014) Shift in microbial population in response to crystalline cellulose degradation during enrichment with a semi-desert soil. Int Biodeterior Biodegrad 88:134–141CrossRefGoogle Scholar
  27. Kurka AM, Starr M, Heikinheimo M, Salkinoja-Salonen M (2000) Decomposition of cellulose strips in relation to climate, litterfall nitrogen, phosphorus and C/N ratio in natural boreal forests. Plant Soil 219:91–101CrossRefGoogle Scholar
  28. Lu R (1999) Soil and agro-chemical analytical methods. China Agricultural Science and Technology Press, Beijing, pp 146–195 [in Chinese, English abstract]Google Scholar
  29. Muscolo A, Sidari M, Mercurio R (2007) Influence of gap size on organic matter decomposition, microbial biomass and nutrient cycle in Calabrian pine (Pinus laricio, Poiret) stands. For Ecol Manag 242:412–418CrossRefGoogle Scholar
  30. Ni XY, Yang WQ, Li H, Xu LY, He J, Tan B, Wu FZ (2014) The responses of early foliar litter humification to reduced snow cover during winter in an alpine forest. Can J Soil Sci 94:453–461CrossRefGoogle Scholar
  31. Ni XY, Yang WQ, Tan B, He J, Xu LY, Li H, Wu FZ (2015) Accelerated foliar litter humification in forest gaps: Dual feedbacks of carbon sequestration during winter and the growing season in an alpine forest. Geoderma 241:136–144Google Scholar
  32. O’Connell A (1997) Decomposition of slash residues in thinned regrowth eucalpt forest in Western Australia. J Appl Ecol 34:111–122Google Scholar
  33. Prescott CE (2010) Litter decomposition: what controls it and how can we alter it to sequester more carbon in forest soils? Biogeochemistry 101:133–149CrossRefGoogle Scholar
  34. Robinson CH (2001) Cold adaptation in Arctic and Antarctic fungi. New Phytol 151:341–353CrossRefGoogle Scholar
  35. Saccone P, Morin S, Baptist F, Bonneville JM, Colace MP, Domine F, Faure M, Geremia R, Lochet J, Poly F (2013) The effects of snowpack properties and plant strategies on litter decomposition during winter in subalpine meadows. Plant Soil 363:215–229CrossRefGoogle Scholar
  36. Sariyildiz T (2008) Effects of gap-size classes on long-term litter decomposition rates of beech, oak and chestnut species at high elevations in Northeast Turkey. Ecosystems 11:841–853CrossRefGoogle Scholar
  37. Schimel JP, Clein JS (1996) Microbial response to freeze-thaw cycles in tundra and taiga soils. Soil Biol Biochem 28:1061–1066CrossRefGoogle Scholar
  38. Schimel JP, Mikan C (2005) Changing microbial substrate use in Arctic tundra soils through a freeze-thaw cycle. Soil Biol Biochem 37:1411–1418CrossRefGoogle Scholar
  39. Schwarz W (2001) The cellulosome and cellulose degradation by anaerobic bacteria. Appl Microbiol Biotechnol 56:634–649PubMedCrossRefGoogle Scholar
  40. Šnajdr J, Cajthaml T, Valášková V, Merhautová V, Petránková M, Spetz P, Leppänen K, Baldrian P (2011) Transformation of Quercus petraea litter: successive changes in litter chemistry are reflected in differential enzyme activity and changes in the microbial community composition. FEMS Microbiol Ecol 75:291–303PubMedCrossRefGoogle Scholar
  41. Sturm M, Racine C, Tape K (2001) Climate change: increasing shrub abundance in the Arctic. Nature 411:546–547PubMedCrossRefGoogle Scholar
  42. Tan B, Wu FZ, Yang WQ, Liu L, Yu S (2010) Characteristics of soil animal community in the subalpine/alpine forests of western Sichuan during onset of freezing. Acta Ecol Sin 30:93–99CrossRefGoogle Scholar
  43. Tan B, Wu FZ, Yang WQ, He XH (2014) Snow removal alters soil microbial biomass and enzyme activity in a Tibetan alpine forest. Appl Soil Ecol 76:34–41CrossRefGoogle Scholar
  44. Taylor BR, Parkinson D (1988) Does repeated freezing and thawing accelerate decay of leaf litter? Soil Biol Biochem 20:657–665CrossRefGoogle Scholar
  45. Vance ED, Brookes PC, Jenkinson DS (1987) An extraction method for measuring soil microbial biomass C. Soil Biol Biochem 19:703–707CrossRefGoogle Scholar
  46. Vanderbilt K, White C, Hopkins O, Craig J (2008) Aboveground decomposition in arid environments: results of a long-term study in central New Mexico. J Arid Environ 72:696–709CrossRefGoogle Scholar
  47. Watanabe H, Tokuda G (2001) Animal cellulases. Cell Mol Life Sci 58:1167–1178PubMedCrossRefGoogle Scholar
  48. Wu FZ, Yang WQ, Zhang J, Deng RJ (2010) Litter decomposition in two subalpine forests during the freeze–thaw season. Acta Oecol 36:135–140CrossRefGoogle Scholar
  49. Wu QQ, Wu FZ, Yang WQ, Zhao YY, He W, Tan B (2014) Foliar litter nitrogen dynamics as affected by forest gap in the alpine forest of eastern Tibet plateau. PLoS ONE 9:e97112PubMedCentralPubMedCrossRefGoogle Scholar
  50. Yang WQ, Wang KY, Kellomaki S, Gong HD (2005) Litter dynamics of three subalpine forests in Western Sichuan. Pedosphere 15:653–659Google Scholar
  51. Zhang QS, Liang YW (1995) Effects of gap size on nutrient release from plant litter decomposition in a natural forest ecosystem. Can J For Res 25:1627–1638CrossRefGoogle Scholar
  52. Zhang QS, Zak JC (1995) Effects of gap size on litter decomposition and microbial activity in a subtropical forest. Ecology 76:2196–2204CrossRefGoogle Scholar
  53. Zhang QS, Zak JC (1998) Potential physiological activities of fungi and bacteria in relation to plant litter decomposition along a gap size gradient in a natural subtropical forest. Microb Ecol 35:172–179PubMedCrossRefGoogle Scholar
  54. Zhu JX, He XH, Wu FZ, Yang WQ, Tan B (2012) Decomposition of Abies faxoniana litter varies with freeze–thaw stages and altitudes in subalpine/alpine forests of southwest China. Scand J For Res 27:586–596CrossRefGoogle Scholar
  55. Zhu JX, Yang WQ, He XH (2013) Temporal dynamics of abiotic and biotic factors on leaf litter of three plant species in relation to decomposition rate along a subalpine elevation gradient. PLoS ONE 8:e62073PubMedCentralPubMedCrossRefGoogle Scholar

Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Wei He
    • 1
  • Fuzhong Wu
    • 1
  • Danju Zhang
    • 1
  • Wanqin Yang
    • 1
    Email author
  • Bo Tan
    • 1
  • Yeyi Zhao
    • 1
  • Qiqian Wu
    • 1
  1. 1.Key Laboratory of Ecological Forestry Engineering, Long-term Research Station of Alpine Forest Ecosystem, Institute of Ecology & ForestrySichuan Agricultural UniversityChengduChina

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