Diversity of filamentous fungi in organic layers of two forests in Zijin Mountain

Abstract

A study was conducted to evaluate the cultivable filamentous fungal diversity in organic layers (L, F, and H layers) and A1 layer of two main forest types,Pinus massoniana andLiguidambar formasana mixed forest andQuercus variabilis forest, in Zijin Mountain(32°5′ N, 118°48′ E), Nanjing, China. A total of 67 taxa comprising 56 Deuteromycetes, 3 Zygomycetes, 5 Ascomycetes and 3 unidentified fungi were recognized from samples from the forest floor of the two forest types. The most abundant group was Deuteromycetes. The dominant genera in both forests wereAlternaria sp.,Aspergillus sp.,Cladosporium sp.,Mucor sp.,Penicillium sp.,Rhizopus sp.,Gliocladium sp. andTrichoderma spp. The fungal diversity was higher in the mixed forest than that inQ. variabilis forest. For both forest types, the maximum fungal diversity was found in layer F and there existed significantly different in fungal diversity between layer F and layer L. In the mixed forest, richness of fungi isolated from needle litter (P. massoniana) was lower than that from leaf litter (L. formasana). The richness of fungi from needle litter increased with the increase of forest floor depth, but for leaf litter, the fungal diversity decreased with the depth of forest floor. The co-species of fungi from the two forest types, as well as from two kinds of litters in mixed forest, increased with the depth of the forest floor. The succession of fungi along with the process of decomposition was discussed here. The results also showed that litter quality was a critical factor affecting fungal diversity.

Keywords

Zijin Mountain / Forest type / Filamentous fungi / Diversity / Litter / Quercus variabilis forest / Pinus massoniana andLiguidambar formasana mixed fores

References

[1] Ando T., Suzumura H. Decomposition of plant litter and microfungal population III----Successional changes in microfungal species corresponding with weight loss ofPicea jezoensis var.hondoensis leaf litter [J]. Research Bulletin of the faculty of agriculture, Gifu University, 1986, 51: 375-383.

[2] Andrew W., Claridge Y., Simon C. et al. Diversity and habitat relationships of hypogeous fungi.II. Factors influencing the occurrence and number of taxa [J]. Biodiversity and Conservation, 2000, 9: 175-199.

[3] Dongsheng Cheng Forest Microbiology [M], 1993 Harbin: Northeast Forestry University Press 329-329.

[4] Christensen M. A view of fungal ecology [J]. Mycologia, 1989, 81: 1-19.

[5] Fanglan Dai Pandect on Fungi in China [M], 1979 Beijing: Science Press of China 1-1527.

[6] Deng Shuqun Fungi in China [M], 1964 Beijing: Science Press of China 1-688.

[7] Domsch K.H., Gams W., Anderson T.H. Compendium of soil fungi [M], 1980 London: Academic Press

[8] Hawksworth D.L. The fungal dimension of biodiversity: magnitude, significance and conservation [J]. Mycological Research, 1990, 95: 641-655.

[9] Hedger J.P., Lewis Gitay Lsaac S., Frankland J.C., Watling R., Whalley A.J.S. Litter-trapping by fungi in moist tropical forests [C] Aspects of Tropical Mycology, 1993 Cambridge: Cambridge University Press 15-35.

[10] Heilmann-Clausen J., Christensen M. Fungal diversity on decaying beech logs-implications for sustainable forestry [J]. Biodiversity and Conservation, 2003, 12: 953-973.

[11] Heywood V.H., Watson R.T. Global Biodiversity Assessment [M], 1995 Cambridge: Cambridge University Press

[12] Jianhui Huang, Xingguo Han A review on the bcogeochemical cycling in forest ecosystems: Theories and Methods [J]. Chinese Bulletin of Botany, 1995, 12: 145-223.

[13] Jianhui Huang, Lingzhi Chen, Han Xingguo Change of organic matter in the decomposing oak twigs in the temperate forest ecosystems [J]. Acta Botanica Sinica, 1998, 40: 362-369.

[14] Qinghui Huang, Shuzhuan Yang Distribution and flora analysis of microbiomass in a Minxi Forest [J]. Bulletin of Fujian Forest College, 1991, 11: 90-97.

[15] Hyde K. D., Alias S.A. Biodiversity and distribution of fungi associated with decomposingNypa fruticans[J] Biodiversity and Conservation, 2000, 9: 393402-393402.

[16] Bo Li, Chi Yang, Peng Lin Ecology [M], 2000 Beijing: Higher Education Press 461-461.

[17] Yuezhong Li, Shili Zhang, Guangzheng Jiang The succession of fungi and decomposition ofPopulus alba [J]. Chinese Journal of Biology, 1992, 32: 299-304.

[18] Lodge D.J., Cantrell S. Fungal communities in wet tropical forests: variation in time and space [J]. Can. J. Bot., 1995, 73: 1391-1398.

[19] Lodge D.J. Factors related to diversity of decomposer fungi in tropical forests [J]. Biodiversity and Conservation, 1997, 6: 681-688.

[20] Osono T.S., Hobara S., Fujiwara K. et al. Abundance, diversity, and species composition of fungal communities in a temperate forest affected by excreta of the Great CormorantPhalacrocorax carbo [J]. Soil Biology and Biochemistry, 2002, 34: 1537-1547.

[21] Parungao M.M., Fryar S.C., Hyde K.D. Diversity of fungi on rainforest litter in North Queensland, Australia [J]. Biodiversity and Conservation, 2002, 11: 1185-1194.

[22] Paul B., Brian S. Soil fungi: diversity and detection [J]. Plant and Soil, 2001, 232: 147-154.

[23] Polishook J.D., Bills G.F., Lodge D.J. Microfungi from decaying leaves of two rainforest trees, in Puerto Rico [J]. Journal of Industrial Microbiology, 1996, 17: 284-294.

[24] Rossman, A.Y. 1994. A strategy for an all-taxa inventory of fungal biodiversity [C]. In: C.L. Peng and C.H. Chou, (eds), Biodiversity and Terrestrial Ecosystems Taipei: Academia Sinica Monograph Series 14, Institute of Botany. p169–194.

[25] Subramanian C.V. Tropical mycology: future needs and development [J]. Current Sci., 1982, 51: 321-325.

[26] Tian X., Takeda H., Ando T. Application of a rapid thin section method for observations on the decomposing litter in the mor humus form in a subalpine coniferous forest [J]. Ecological Research, 1997, 12: 289-300.

[27] Xingjun Tian, Takahiro Tateishi Relative roles of microorganisms and soil animals on needle litter decomposition in a subalpine coniferous forest [J]. Acta Phytoecologica Sinica, 2002, 26: 257-263.

[28] Jin Wang, Jianhui Hang Comparison of major nutrient release patterns in leaf litter release patterns in leaf litter decomposition in warm temperate zone of China [J]. Acta Phytoecologica Sinica, 2001, 26: 375-390.

[29] Watanabe T. Soil and seed fungi [M], 1994 Tokyo: Soft Science Publications

[30] Jingchao Wei Handbook of Fungi Identification [M], 1979 Shanghai: Shanghai Scientific Press 1-649.

[31] Gguanghui Xu, Hongyuan Zheng, Desheng Zhang Distribution and biochemical characteristics of microbiomass in a forest soil of North Slope of Changbai Mountain, China [J]. Chinese Journal of Ecology, 1984, 4: 207-223.

[32] Tuo Yao, Junxiu Yang Microbial Ecology of litter and Soil in Forest [J]. Journal of Northwest Forestry College, 1997, 12(4): 97-103.

[33] Tuo Yao, Junxiu Yang Population and ecological characteristics of soil fungi in larch plantation on Qinling Mountains [J]. Chinese Journal of Ecology, 1998, 17: 7-13.

[34] Zare-Maivan H., Shearer C. A. Extracellular enzyme production and cell wall degradation by freshwater lignicolous fungi [J]. Mycologia, 1988, 80: 365-375.

[35] Shuxian Zhang Fungi characteristics during decomposition of forest litter [J]. Chinese Journal of Ecology, 1988, 7: 30-32.

[36] Bin Zhao, Shaojiang He Experiment of Microbiology [M], 2002 Beijing: Science Press of China 264-264.