Influence of density adjustment on canopy structure and understory vegetation of the Larix principis-rupprechtii plantation in Taiyue Mountain, Shanxi, China.
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摘要: 华北落叶松人工林是太岳山主要的公益林,由于林分密度普遍偏大,林下植被稀疏,林分质量较差。密度调整对于提高人工林质量,增加林下植物物种多样性,维持生态系统功能具有重要意义。本研究在山西太岳山好地方林场典型地段35年生华北落叶松人工林中设置4种密度调整强度(对照处理、20%、30%和50%),研究华北落叶松人工林的冠层结构、光环境特征和林下植被分布对密度调整的响应。结果表明:1)密度调整显著改变了华北落叶松人工林的冠层结构,改善了林下光环境,增加了冠层结构的空间异质性。与对照处理相比,密度调整强度为20%、30%、50%的林分叶面积指数(LAI)分别下降了18.25%、25.76%、37.50%;林分开度分别增加了17.45%、25.37%、42.81%。密度调整强度为20%、30%、50%的林分林下总辐射分别为对照处理的1.3、1.4和2.1倍。2)密度调整改变了林下群落结构,增加了林下植物的种类和数量以及林下植物物种多样性。密度调整强度为30%的林分物种多样性最高,林下群落结构最复杂。3)相关性分析和CCA排序结果显示,冠层结构与林下物种多样性呈显著相关,能够较好地解释林下物种分布的变化,其中,LAI是引起华北落叶松人工林草本层物种组成变化的主要因子,与草本层物种多样性呈显著负相关关系。Abstract: Larix principis-rupprechtii plantations are major public welfare forests in Taiyue Mountain, North China. However, the stand quality of L. principis-rupprechtii plantations is limited due to the high stand density. Density adjustment is therefore of great significance in improving the quality of plantations, increasing the understory species diversity and maintaining ecosystem functions. In order to investigate the influence of density adjustment on canopy structure, light environment and species diversity of understory vegetation, a thinning experiment was conducted in a 35-year-old L. principis-rupprechtii plantation with heavy (50%), medium (30%) and light (20%) intensities and unthinned plots as control in Taiyue Mountain. The results showed that: 1) density adjustment had significant effects on the forest canopy structure and light environment of understory. The spatial heterogeneity of canopy structure was increased following the density adjustment. After thinning treatments at 20%, 30% and 50% intensities, the canopy leaf area index (LAI) was reduced by 18.25%, 25.76% and 37.50%, respectively, compared to the control, while the openness was increased by 17.45%, 17.45% and 17.45%, respectively. Photosynthetic photon flux density (PPFD) was 1.3, 1.4 and 2.1 times that of the control, respectively. 2) The number of understory species and their quantities were increased by changing the structural characteristics of the understory community. The highest species diversity and the most complex structure appeared in the 30% thinning treatment. 3) Correlation analysis and CCA sorting analysis showed a significant correlation between the canopy structure and diversity of understory vegetation. The diversity of herb layer species had a significantly negative correlation with LAI, which was the main factor affecting species composition in the herb layer.
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Key words:
- density adjustment /
- canopy structure /
- light environment /
- species diversity
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[1] CHENG X R, FENG L, YU M K, et al. Effects of thinning on canopy structure and soil nutrient in ecological plantation [J]. Ecology and Environmental Sciences, 2010, 19(2):355-359. [2] 成向荣,冯利,虞木奎,等.间伐对生态公益林冠层结构及土壤养分的影响[J].生态环境学报,2010,19(2):355-359. [3] WANG S L, HE K N, LIU K X, et al. Diversity and niche of different plantation configuration in alpine region in Qinghai Province [J]. Journal of Northwest AF University (Natural Sciences Edition), 2013,41(11):67-72. [4] 王世雷,贺康宁,刘可暄,等.青海高寒区不同人工林下植被的多样性及生态位研究[J].西北农林科技大学学报(自然科学版),2013,41(11):67-72. [5] 李春义,马屡一,徐昕.抚育间伐对森林生物多样性影响研究进展[J].世界林业研究,2006,19(6):27-32. [6] LI C Y, MA L Y, XU X. Reviews on research progress of effect of tending on forest biodiversity [J]. World Forestry Research, 2006, 19(6):27-32. [7] 剪文灏,肖志军,黄永辉.木兰围场林管局华北落叶松人工林林下植物多样性研究[J].河北林果研究,2013,28(1):44-48. [8] JIAN W H, XIAO Z J, HUANG Y H. Research on the understory vegetation diversity of Larix principis-rupprechii plantation [J]. Hebei Journal of Forestry and Orchard Reseach, 2013,28(1):44-48. [9] 刘勇,李国雷,李瑞生,等.密度调控对油松人工林土壤肥力的影响[J].西北林学院学报,2008,23(6):18-23. [10] LIU Y, LI G L, LI R S, et al. Effected of tree density on soil fertility in Pinus tabulaeformis plantations [J]. Journal of Northwest Forestry University, 2008, 23(6):18-23. [11] 于立忠,朱教君,孔祥文,等.人为干扰(间伐)对红松人工林林下植物多样性的影响[J].生态学报,2006,26(11):3757-3764. [12] YU L Z, ZHU J J, KONG X W, et al. The effects of anthropogenic disturbances (thinning) on plant species diversity of Pinus koraiensis plantations [J]. Acta Ecologica Sinica, 2006, 26(11):3757-3764. [13] LI G X, MENG G T, FANG X J, el al. Influence of intermediate cutting on structure features and species diversity of Pinus yunnanens in pure forests [J]. Journal of Northwest Forestry University, 2007, 22(5):164-167. [14] 李贵祥,孟广涛,方向京, 等.抚育间伐对云南松纯林结构及物种多样性的影响研究[J].西北林学院学报,2007,22(5): 164-167. [15] LU X L, DING S Y, YOU L, et al. Effects of forest canopy structure on understory vegetation characteristics of Funiu Mountain nature reserve [J]. Acta Ecologica Sinica, 2013, 33(15):4715-4723. [16] 卢训令,丁圣彦,游莉,等.伏牛山自然保护区森林冠层结构对林下植被特征的影响[J].生态学报,2013,33(15): 4715-4723. [17] CHEN G, DAI L M, ZHOU L. Structure of stand and canopy characteristics of disturbed communities of broadleaved Pinus koraiensis forest in Changbai Mountain [J]. Chinese Journal of Ecology, 2004, 23(5):116-120. [18] DAWSON T P, JACKSON S T, HOUSE J I, et al. Beyond predictions: biodiversity conservation in a changing climate [J]. Science, 2011, 332:53-57. [19] REICH P B, TILMAN D, ISBELL F, et al. Impacts of biodiversity loss escalate through time as redundancy fades[J]. Science, 2012, 336:589-592. [20] OU Y D, SU Z Y. Spatial heterogeneity dynamics of canopy structure in a montane evergreen broadleaved forest following a natural disturbance in north Guangdong [J]. Plant Science Journal, 2012, 30(3): 223-229. [21] 陈高,代力民, 周莉.受干扰长白山阔叶红松林林分组成及冠层结构特征[J].生态学杂志,2004,23(5):116-120. [22] L H R, LIU S S, ZHU J Y, et al. Effects of human disturbance on understory woody species composition and diversity in fengshui forests [J]. Biodiversity Science, 2009, 17(5): 458-467. [23] ZHANG Y L, KANG F F, HAN H R, et al. Measurement and analysis on understory light environment and canopy structure of Pinus tabulaeformis plantation in the Taiyue Mountain [J]. Journal of Nanjing Forestry University (Natural Sciences Edition), 2014, 38(2):169-174. [24] 区余端,苏志尧.粤北山地常绿阔叶林自然干扰后冠层结构空间异质性动态[J].植物科学学报,2012,30(3):223-229. [25] WU Z X, ZHANG L, ZHANG X M, et al. Nekton community structure and its relationship with main environmental variables in Lidao artificial reef ones of Rongcheng [J]. Acta Ecologica Sinica, 2012, 32(21):6737-6746. [26] 吕浩荣,刘颂颂,朱剑云,等.人为干扰对风水林群落林下木本植物组成和多样性的影响[J].生物多样性,2009,17(5): 458-467. [27] SU Z Y, LIU G, OU Y D, et al. Storm damage in a montane evergreen broadleaved forest of Chebaling national nature reserve, south China [J]. Chinese Journal of Plant Ecology, 2010, 34(2): 213-222. [28] YU M, ZHOU Z Y, KANG F F, et al. Gradient analysis and environmental interpretation of understory herb-layer communities in Xiaoshegou of Lingkong Mountain, Shanxi, China [J]. Chinese Journal of Plant Ecology, 2013, 37(5):373-383. [29] SURIGUGA, ZHANG J T, WANG Y X. Species diversity of forest communities and its forecasting by neural network in the Songshan national nature reserve, Beijing[J]. Acta Ecological Science, 2013, 33(11):3394-3403. [30] OU Y D, SU Z Y. Dynamics of canopy structure and understory light in montane evergreen broadleaved forest following a natural disturbance in north Guangdong [J]. Acta Ecologica Sinica, 2012, 32(18):5637-5645. [31] 张彦雷,康峰峰,韩海荣,等.太岳山油松人工林冠下光环境特征与冠层结构[J].南京林业大学学报(自然科学版),2014,38(2):169-174. [32] HAN Y Z, WANG Z Q, GU J C. The effects of spatial heterogeneity of understory light availability on regeneration of Manchurian ash [J]. Acta Phytoecologica Sinica, 2004, 28(4):468-475. [33] 吴忠鑫,张磊,张秀梅,等.荣成俚岛人工鱼礁区游泳动物群落特征及其与主要环境因子的关系[J].生态学报,2012, 32(21):6737-6746. [34] REN X M, YANG G H, WANG D X, et al. Effects of environmental factors on species distribution and diversity in an Abies fargesii-Betula utilis mixed forest [J]. Acta Ecologica Sinica, 2012, 32(2):605-613. [35] WANG W. Effects of forest tending on soil respiration in Pinus tabulaeformis artificial forest [D]. Beijng: Beijing Forestry University, 2013. [36] 余敏,周志勇,康峰峰,等.山西灵空山小蛇沟林下草本层植物群落梯度分析及环境解释[J].植物生态学报,2013,37(5):373-383. [37] RICHARDS J D, HART J L. Canopy gap dynamics and development patterns in secondary Quercus, stands on the Cumberland Plateau, Alabama, USA[J]. Forest Ecology Management, 2012, 262(12):2229-2239. [38] LI C M, DU J S, ZHANG H R. The effects of thinning on forest growth and model study [J]. Forest Research, 2003, 16(5): 636-641. [39] LEI X D, LU Y C, ZHANG H R, et al. Effects of thinning on mixed stands of Larix olgensis, Abies nephrolepis and Picea jazoensis [J]. Scientia Silvae Sinicae, 2005, 41(4):78-85. [40] GRAVEL D, CANHAM C D, BEAUDET M, et al. Shade tolerance, canopy gaps and mechanisms of coexistence of forest trees [J]. Oikos, 2010, 119(3):475-484. [41] 区余端,苏志尧.粤北山地常绿阔叶林自然干扰后冠层结构与林下光照动态[J].生态学报,2012,32(18):5637-5645. [42] LIU S C, DUAN W B, FENG J, et al. Effects of forest gap on tree species regeneration and diversity of mixed broadleaved Korean pine forest in Xiaoxingan Mountains [J]. Chinese Journal of Applied Ecology, 2011, 22(6):1381-1387. [43] 韩有志,王政权,谷加存.林分光照空间异质性对水曲柳更新的影响[J].植物生态学报,2004,28(4):468-475. [44] 任学敏,杨改河,王得祥,等.环境因子对巴山冷杉-糙皮桦混交林物种分布及多样性的影响[J].生态学报,2012,32(2):605-613. [45] 王伟.抚育间伐对油松人工林土壤呼吸的影响[D].北京:北京林业大学,2013. [46] 李春明,杜纪山,张会儒.抚育间伐对森林生长的影响及其模型研究[J].林业科学研究,2003,16(5):636-641. [47] 雷向东,陆元昌,张会儒,等.抚育间伐对落叶松云冷杉混交林的影响[J].林业科学,2005,41(4):78-85. [48] GILLIAM F S, TURRILL N L, ADAMS M B. Herbaceous layer and over story species in clear cut and mature central Appalachian hardwood forest [J]. Ecological Applications,1995, 5(4):947-955. [49] 刘少冲,段文标,冯静,等.林隙对小兴安岭阔叶红松林树种更新及物种多样性的影响[J].应用生态学报,2011,22(6):1381-1387. [50] CONNELL J H. Diversity in tropical rain forests and coral reef[J]. Science, 1978,199:1302-1310. -
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