调查了摩天岭北坡以常绿阔叶林带与落叶阔叶混交林为主的低海拔区（700~1 500 m）和针阔叶混交林与亚高山针叶林为主的高海拔区（2 100~3 400 m）的21个木本植物群落组成，测定了104种植物的比叶面积（SLA）、叶干物质含量（LDMC）、叶片全磷含量（TPC）、叶片全氮含量（TNC）、叶片全碳含量（TCC）以及叶片厚度（LT）等6个植物功能性状。采用相关性分析对6个植物功能性状的变异和关联进行分析。结果表明：（1）SLA、LT和TCC在高海拔区明显高于低海拔区，而LDMC和TNC表现出高海拔区低于低海拔区；（2）SLA均随海拔的升高表现出降低的趋势，而LDMC和LT都随海拔的升高呈现增加的趋势。低海拔区TCC和高海拔区TCC都随海拔的升高呈增加的趋势；低海拔区TNC和TPC随海拔的变化与高海拔区相反，TNC和TPC在低海拔区随着海拔的升高表现出增加的趋势，而在高海拔区随海拔的增加呈现降低的趋势。（3）在高、低海拔区，SLA与LDMC、LT和TCC均呈极显著的负相关关系（P<0.01），LDMC与LT和TCC呈极显著的正相关关系（P<0.01）。摩天岭北坡不同海拔区木本植物叶片功能性状与海拔的关系，反映了该区域木本植物的不同叶片功能性状对海拔决定的环境异质性的协同响应和适应。
This research investigated the species composition of 21 woody plants in the low altitude area (700-1 500 m) dominated by evergreen broad-leaved forest and deciduous broad-leaved forest and the high altitude areas(2 100-3 400 m) dominated by coniferous and broad-leaved mixed forest and subalpine coniferous forest in the Motianling northern-facing slope and determined six plant functional traits such as the leaf area (SLA), leaf dry matter content (LDMC), leaf phosphorus content (TPC) and nitrogen content (TNC), carbon content (TCC) and leaf thickness (LT) for 104 species. This paper discussed variation and correlation of woody plant functional traits of Motianling North-facing slope using correlation analysis. The results showed that:(1)SLA, LT and TCC in high altitude area were significantly higher than those in low altitude area. On the contrary, LDMC and TNC were higher in the low altitude area. (2)SLA showed a decreasing trend with the increase of altitude gradient. In contrast to SLA, both LDMC and LT showed an increasing trend with the increase of altitude. TCC showed an increasing trend with the increase of altitude in high and low altitude area. And the change of TNC and TPC in the low altitude area with the altitude gradient was opposite to the high altitude area. TNC and TPC showed a decreasing trend with the increase of altitude gradient in high altitude area and showed an increasing trend with the increase of altitude in the low altitude area. (3) Whether the high altitude areas or low altitude areas, there was extremely significant negative correlation (P<0.01) between SLA and LDMC, LT and TCC. And there was very significant positive correlation (P<0.01) between LDMC and LT, TCC, too. The relationship between leaf function of woody plant traits and different altitudes on the northern slope of the ridge altitude ferris, which reflected the different leaf functional traits of woody plants in the region to the coordinated response and adaptation for environmental heterogeneity determined by elevation.
[1] Zuo X,Zhang J,Zhou X,et al.Changes in carbon and nitrogen storage along a restoration gradient in a semiarid sandy grassland[J].Acta Oecologica,2015,69:1-8.
[2] Zuo X,Wang S,Lv P,et al.Plant functional diversity enhances associations of soil fungal diversity with vegetation and soil in the restoration of semiarid sandy grassland[J].Ecology and Evolution,2016,6(1):318-328.
[3] 周欣,左小安,赵学勇,等.科尔沁沙地中南部34种植物叶功能性状及其相互关系[J].中国沙漠,2015,35(6):1489-1495.
[4] 周欣,左小安,赵学勇,等.科尔沁沙地植物功能性状的尺度变异及关联[J].中国沙漠,2016,36(1):20-26.
[5] 朱媛君,杨劼,万俊华,等.毛乌素沙地丘间低地主要植物叶片性状及其相互关系[J].中国沙漠,2015,35(6):1496-1504.
[6] Zuo X A,Wang S K,Zhao X Y,et al.Scale dependence of plant species richness and vegetation-environment relationship along a gradient of dune stabilization in Horqin Sandy Land,Northern China[J].Journal of Arid Land,2014,6(3):334-342.
[7] 袁亚鹏,赵阳,赵传燕,等.黑河下游不同生境胡杨(Populus euphratica)叶片碳同位素组成特征[J].中国沙漠,2015(6):1505-1511.
[8] Schwoertzig E,Poulin N,Hardion L,et al.Plant ecological traits highlight the effects of landscape on riparian plant communities along an urban-rural gradient[J].Ecological Indicators,2016,61:568-576.
[9] 戚鹏程.白水江国家级自然保护区植物区系的垂直分异规律研究[D].兰州:西北师范大学,2005.
[10] 张可荣,黄华梨,杨文云.甘肃白水江国家级自然保护区生物多样性概况及保护策略[J].甘肃林业科技,2002,27(2):19-22.
[11] Arndt S K.Integrated research of plant functional traits is important for the understanding of ecosystem processes[J].Plant and Soil,2006,285(1/2):1-3.
[12] Mao R,Zhang X,Song C.Effects of nitrogen addition on plant functional traits in freshwater wetland of Sanjiang Plain,Northeast China[J].Chinese Geographical Science,2014,24(6):674-681.
[13] Venn S E,Green K,Pickering C M,et al.Using plant functional traits to explain community composition across a strong environmental filter in Australian alpine snowpatches[J].Plant Ecology,2011,212(9):1491-1499.
[14] Reich P B,Uhl C,Walters M B,et al.Leaf lifespan as a determinant of leaf structure and function among 23 Amazonian tree species[J].Oecologia,1991,86(1):16-24.
[15] Hultine K R,Marshall J D.Altitude trends in conifer leaf morphology and stable carbon isotope composition[J].Oecologia,2000,123(1):32-40.
[16] Craine J M,Lee W G.Covariation in leaf and root traits for native and non-native grasses along an altitudinal gradient in New Zealand[J].Oecologia,2003,134(4):471-478.
[17] 张月强.探究泰山木本植物功能性状间的关系及对环境因子的响应[D].济南:山东大学,2014.
[18] Wilson P J,Thompson K E N,Hodgson J G.Specific leaf area and leaf dry matter content as alternative predictors of plant strategies[J].New phytologist,1999,143(1):155-162.
[19] Wright I J,Cannon K.Relationships between leaf lifespan and structural defences in a low-nutrient,sclerophyll flora[J].Functional Ecology,2001,15(3):351-359.
[20] 杨锐,张博睿,王玲玲,等.元谋干热河谷植物功能性状组合的海拔梯度响应[J].生态环境学报,2015,24(1):49-56.
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