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Response of the Capsule Production and Spore Germination of Sphagnum Species in Hani Peatland to Environmental Changes

Author: ZhaoGaoLin
Tutor: BoZhaoJun
School: Northeast Normal University
Course: Wetland Science
Keywords: Settlement Warming Nitrogen deposition Microhabitats Spore capsule form
CLC: Q945
Type: Master's thesis
Year: 2011
Downloads: 35
Quote: 0
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Abstract


Sphagnum peatlands often dominant species in the global carbon cycle plays an important role . Spore capsule production and spore germination Sphagnum populations may have an important impact continually updated , but so far , this aspect has been reported rarely studied . This thesis Hani Peatland in Changbai Mountain land for the study , and a large peat moss , sphagnum moss and beak pointed leaf leaves as the main research Sphagnum species , habitat and microhabitat differences graduate Sphagnum plants for the production of spore capsule , spore viability variation with time and environmental change on Sphagnum spore germination and vigor of , try to find the peat moss plant wild updated evidence . By studying the following conclusions: ( 1 ) habitat differences affect spore capsule formation. Forest edge habitats spore capsule production volume is much larger than the open habitat spore capsule production volume . Hydrological conditions and the different orientations of moss mound microhabitats such conditions affecting spore capsule formation. ( 2 ) sharp leaves Sphagnum spore germination rate increases with time diminishes , and a large beak and Sphagnum peat moss leaves are not showing increases over time and continuous decrease of the law. Two kinds of Sphagnum spores mature , the germination rate decreased rapidly growing season in the year , has entered a dormant spore germination rate is close to zero , whereas in the second year of growth in the season, spore germination rapidly. ( 3 ) Under natural conditions , significantly promote N input three kinds of peat moss spore germination , but has no effect on spore germination potential , phosphorus for spore germination and germination potential of no significant effect. ( 4 ) Finally , it may be the most important result of this study is found in the present study Sphagnum spores can germinate under field conditions , this provides Sphagnum peat plants germinate in the wild direct evidence . Sphagnum spore production has important ecological significance. In peatlands by major natural disturbances such as fire or volcanic activity, and other effects , through the formation of long-term spore germination library , able to reconstruct peatland plant populations .

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CLC: > Biological Sciences > Botany > Plant Physiology
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