Size Characteristics of the Moss Crust Patches and Its Relationship to the Environmental Factors in the Gurbantunggut Desert
Received date: 2013-05-18
Revised date: 2013-07-02
Online published: 2013-07-02
Biological soil crusts takes up 30% area of the Gurbantunggut Desert, moss crusts are the dominant species, they are very important in the prevention of wind and sand, promoting dew capture. In natural condition, moss crusts are distributed in the form of different size patches. In this study, we researched moss crusts from the point of patch size and analyzed the size characteristics and environmental factors that influence the patch size. Our results indicated that: (1) there were 6 930 patches with area less than 100 cm2, and accounted for about 94% of total surveyed moss crust patches; patches with area over 100 cm2 took up 6% of total surveyed patches. (2) in this study total surveyed area of moss crust were 143 223 cm2, total area of the patches with area less 100 cm2 were 57 289 cm2 and took up 40% of total area; the second rank were those patches with area of 100-200 cm2, the total area of 100-200 cm2 patches were 32 941 cm2 and took up 23% of total surveyed moss crust; the area of those patches with area over 200 cm2 was 50 128 cm2 and took up 35% of total surveyed moss crust. On the whole, big size patches mainly occurred in the south-east and small size patches were found in the north-west of the desert, this pattern was consistent with the distribution of moss crust on the regional scale. (3) there was positive effect of soil particles with diameter less than 0.2 mm on the patch size, soil particles with the diameter more than 0.2 mm were not in favor of big size patches. (4) the shrub canopy area were weak negatively related with the moss crust patch size, and organic matter, total nitrogen, available potassium and soluble calcium were positive related with patch size, these were similar to the results of regional scale.
JI Xue-hua1 , 2 , ZHANG Yuan-ming2 , TAO Ye2 , ZHOU Xiao-bing2 , ZHANG Jing2 . Size Characteristics of the Moss Crust Patches and Its Relationship to the Environmental Factors in the Gurbantunggut Desert[J]. Journal of Desert Research, 2013 , 33(6) : 1803 -1809 . DOI: 10.7522/j.issn.1000-694X.2013.00268
[1]Nash T H,White S L,Marsh J E.Lichen and moss distribution and biomass in hot desert ecosystems[J].Bryologist,1977,80:470-479.
[2]张元明,潘惠霞,潘伯荣.古尔班通古特沙漠不同地貌部位生物结皮的选择性分布[J].水土保持学报,2004,18(4):61-64.
[3]张元明,陈晋,王雪芹,等.古尔班通古特沙漠生物结皮的分布特征[J].地理学报,2005,60(1):53-60.
[4]陈亚宁,李卫红,张元明,等.新疆古尔班通古特沙漠生物结皮在沙丘尺度的生态与环境解释[J].自然科学进展,2006,15(10):61-66.
[5]王雪芹,张元明,王远超,等.古尔班通古特沙漠生物结皮小尺度分异的环境特征[J].中国沙漠,2006,26(5):711-716.
[6]杨伟,陈晋,张元明,等.古尔班通古特沙漠1970-2000年代生物结皮覆盖变化研究[J].自然资源学报,2006,21(6):934-941.
[7]张元明,曹同,潘伯荣.新疆古尔班通古特沙漠南缘土壤结皮中苔藓植物的研究[J].西北植物学报,2002,22(1):18-23.
[8]李卫红,任天瑞,周智彬,等.新疆古尔班通古特沙漠生物结皮的土壤理化性质分析[J].冰川冻土,2005,27(4):619-626.
[9]杨海峰,钱亦兵,蒋超,等.古尔班通古特沙漠南缘主要土壤化学特征的空间异质性[J].中国沙漠,2010,30(2):319-325.
[10]吴正.准噶尔盆地沙漠地貌发育的基本特征[M]//吴正.中国沙漠与海岸沙丘研究.北京:科学出版社,1997:29-43
[11]李新荣,贾玉奎,龙利群,等.干旱半干旱地区土壤微生物结皮的生态学意义及若干研究进展[J].中国沙漠,2001,21(1):7-14.
[12]王雪芹,张元明,张伟民,等.古尔班通古特沙漠生物结皮对地表风蚀作用影响的风洞实验[J].冰川冻土,2004,26(5):632-638.
[13]吴永胜,哈斯,屈志强.影响生物土壤结皮在沙丘不同地貌部位分布的风因子讨论[J].中国沙漠,2012,32(4):980-984.
[14]朱朝云,丁同栋.风沙物理学[M].北京:中国林业出版社,1991:44-51.
[15]贾艳,白学良,单飞彪,等.藓类结皮层人工培养试验和维持机制研究[J].中国沙漠,2012,32(1):54-59.
[16]Anderson D C,Harper K T,Holmgren R C.Factors influencing development of cryptogamic soil crusts in utah deserts[J].Journal of Range Management,1982,35:180-185.
[17]Johansen J R.Cryptogamic crusts of semiarid and arid lands of North-America[J].Journal of Phycology,1993,29:140-147.
[18]Carleton T J.Variation in terricolous bryophyte and macrolichen vegetation along primary gradients in Canadian boreal forests[J].Journal of Vegetation Science,1990,1:585-594.
[19]Lesica P,Shelly J S.Effects of cryptogamic soil crust on the population-dynamics of arabis-fecunda (brassicaceae)[J].American Midland Naturalist,1992,128:53-60.
[20]赵哈林,郭轶瑞,周瑞莲.灌丛对沙质草地土壤结皮形成发育的影响及其作用机制[J].中国沙漠,2011,31(5):1105-1111.
[21]Jeffries D L,Klopatek J M.Effects of grazing on the vegetation of the blackbrush association[J].Journal of Range Management,1987,40:390-392.
[22]Evans R A,Young J A.Microsite requirements for downy brome (bromus-tectorum) infestation and control on Sagebrush rangelands[J].Weed Science,1984,32:13-17.
[23]Gutterman Y.Strategies of seed dispersal and germination in plants inhabiting deserts[J].Botanical Review,1994,60:373-425.
[24]Boeken B,Shachak M.Desert plant-communities in human-made patches-implications for management[J].Ecological Applications,1994,4:702-716.
[25]Rogers R W.Soil surface lichens in arid and subarid Southeastern Australia.3.relationship between distribution and environment[J].Australian Journal of Botany,1972,20:301-316.
[26]Belnap J.The world at your feet:desert biological soil crusts[J].Frontiers in Ecology and the Environment,2003,1:181-189.
[27]Lange O L.Photosynthetic productivity of the epilithic lichen Lecanora muralis:long-term field monitoring of CO2 exchange and its physiological interpretation Ⅱ.Diel and seasonal patterns of net photosynthesis and respiration[J].Flora,2003,198:55-70.
[28]Evans R D,Belnap J.Long-term consequences of disturbance on nitrogen dynamics in an arid ecosystem[J].Ecology,1999,80:150-160.
/
〈 |
|
〉 |