A study on lakeside dominant plants litter decomposition characteristics in Napahai plateau wetland in northwest Yunnan
GUO Xu-hu, TIAN Kun*, XIAO De-rong, DONG Yu, LIU Ling-cong, YANG Hao
1. School of Environmental Science and Engineering Southwest Forestry University, Kunming 650224, China; 2. National Plateau Wetlands Research Center, Kunming 650224, China
Lakeside dominant plants, Zizania caducifolia, Scirpus tabernaemontani and Heleocharis liouana, in Napahai plateau wetland in northwest Yunnan were chosen as research objectives. The decomposition dynamics was studied by litterbag method, and initial chemical components of litters were also analyzed. The results showed that the retention rate of the three litters was reduced with decrease of time, while the retention rate was not correlated with time. The retention rate of Scirpus tabernaemontani (70.5%) was obviously higher than that of Zizania caducifolia (56%) and Heleocharis liouana (52.5%)(P<0.05), while the latter two had no significant difference in retention rate. The decomposition rates differed in each community litter. Heleocharis liouana had the fastest decomposition rate, followed by Zizania caducifolia and then Scirpus tabernaemontani, with k, the average decomposition ration constant, 0.067, 0.062 and 0.039 respectively. The three litters had different decomposition rates in different periods, and the decomposition was closely related to temperature, which was increased with increase of temperature, showing a linear increase. In addition, the three litters were significantly different in C, N components, while there was no evidence showing that the decomposition rate was closely related to the initial C, N and C/N.
[1] 彭少麟, 刘强. 森林凋落物动态及其对全球变暖的响应[J]. 生态学报, 2002, 22(9): 1534~1544.
[2] 尹承军, 黄德华, 陈佐忠. 内蒙古典型草原4中植物凋落物分解速率与气候因子之间的定量关系[J]. 生态学报, 1994, 14(2): 149~154.
[3] Chapin F S Ⅲ, Matson P A, Mooney H A. Principles ofter-restrial ecosystem ecology[M]. New York: Springer-Verlag, 2002.
[4] Berg B, Mc Claugherty C. Plant Litter: Decomposition, hu-mus formation. carbon sequestration[M]. New York: Springer-Vedag, 2003.
[5] Zhu J Z, Liu J J, Zhu Q K. Hydro-ecological functions of forest litter layers[J]. Journal of Beijing Forestry University, 2002, 24(5/6): 30~34.
[6] Ogee J, Brunet Y A. Forest floor model for heat and moisture including a litter layer[J]. Journal of Hydrology, 2002, 255(1-4):212~233.
[7] 程积民, 万惠娥, 胡相明, 赵艳云. 半干旱区封禁草地凋落物的积累与分解[J]. 生态学报, 2006, 26(4): 1027~1212.
[8] 云南省林业调查规划院. 高原湖泊生态系统类型的自然保护区-纳帕海自然保护区[M]. 北京: 中国林业出版社, 1989. 273.
[9] 肖德荣, 田昆, 袁华, 杨宇明, 李宁云, 徐守国. 高原湿地纳帕海水生植物群落分布格局及变化[J]. 生态学报, 2006, 26(11): 3624~3630.
[10] Olson J S. Energy storage and the balance of producers and decomposers in ecological systems[J]. Ecology, 1963, 44: 322~331.
[11] 何池全. 毛果苔草湿地枯落物及其地下生物量动态[J].应用生态学报, 2003, 14(3): 363~366.
[12] Bockheim J G. Distribution and cycling of elements in a Pinus resinosa plantation ecosystem in Wisconsin[J]. Can J ForRes, 1983, 13: 609~629.
[13] Cao Q G. Patterns of mass loss, nutrient accumulation and release of leaf litter in the Moso(Phyllostachys pubescens) Stands[J]. For SciRes, 1997, 9(3): 268~274(in Chinese).
[14] Kalburtji K L, Mamolos A P & Kostopoulou S K. Litter dynamics of Dactyl is glomerata and Vicia villosa with respect to climatic and soil characteristics[J]. Grass and Forage Science, 1998, 53: 225~232.
[15] Moore T R, Trofymow J A, Taylor B, Prescott C, Camire C, Duschene L, Fyles J, Kozak L, Kranab M etter, I. Morrison, M. Siltanen, S. Smith, B. Titus, S. Visser, R. Wein & S. Zoltai. Litter decomposition rates in Canadian forests[J]. Global Change Biology, 1999, 5: 75~82.
[16] Melillo, J. M., Aber J D & Muratore J F. Nitrogen and lignin control of hardwood leaf litter decomposition dynamics[J]. Ecology, 1982, 62: 621~626.
[17] Norby, R. J. & Cotrufo M F. A question of litter quality[J]. Nature, 1998, 396: 17~18.
[18] Taylor B R, Parkinson D & Parsons W J F. Nitrogen and lignin content as predictors of litter decay rates: a microcosm test[J]. Ecology, 1989, 70: 97~104.
[19] Seastedt T R. Mass nitrogen and phosphorus dynamics in foliage and root detritus in tall grass prairie[J]. Ecology, 1988, 69: 59~65.
[20] Mary B, Recous S, Darwis D. Interactions between decomposition of plant residues and nitrogen cycling in soil[J]. Plant and Soil, 1996, 181: 71-82.
[21] Moore T R, Trofymow J A, Taylor B. Litter decomposition rates in Canadian forests[J]. Global Change Biology, 1999, 5: 75-82.
[22] Martnez-Yrzar A, Nunez S, Brquez A. Leaf litter decomposition in a southern Sonoran desert ecosystem, northwestern Mexico: Effects of habitat and litter quality[J]. Acta Oecologica, 2007, 32: 291~300.
[23] Murphy K J, Klopatek J M & Klopatek C C. T he effects of litter quality and climate on decomposition along an elevational gradient[J]. Ecological Applications, 1998, 8: 1061~1071.