青海湖流域植被物候格局时空动态变化及其与植被退化的关系

doi:10.11686/cyxb2015210

摘要/Abstract

摘要： 本研究利用2000-2014年期间MODIS 16 d合成EVI 数据,选用阈值法模型提取了青海湖流域逐年的植被关键物候期,分析了物候时空动态变化特征及其与植被退化的关系。结果表明,青海湖流域内植被陆续在4月中旬-6月中旬进入返青阶段,8月中旬-10月中旬进入枯黄期,生长季长度在100~150 d之间。植被陆续进入返青期的时间在流域整体空间上呈现由东南向西北延迟的水平地带性变化趋势,多高山分布区域的植被进入返青期时间表现出垂直非地带性特征。植被进入枯黄期的时间与进入返青期早晚的时间在空间格局上相反,生长季长短空间格局与植被进入返青时间早晚的空间格局一致。气候变化趋势下,流域植被物候时空动态变化存在空间异质性,返青期均值年际变化趋势不明显,枯黄期均值提前6.4 d,生长季均值缩短8.9 d。流域内植被物候除受气候因子影响外,与植被退化也有密切关系。植被生长趋于茂盛,返青期呈现延迟趋势;植被生长退化趋势,返青期呈现提前倾向。枯黄期与植被退化的关系较复杂,整体上未表现出明显一致的相关性。植被生长季与植被退化呈现强负相关,即植被生长呈现茂盛趋势的区域,生长季缩短。

Abstract: This paper presents a threshold method to examine the vegetation phenology in a Qinghai Lake watershed based on a time-series analysis of a MODIS EVI dataset from 2000 to 2014 using 16-day intervals. The spatio-temporal variation of vegetation phenology and the relationship with vegetation degradation were also analyzed. The results showed that the beginning of the vegetation growing season (BGS) occurred from mid-April to mid-June and the end of growing season (EGS) from mid-August to mid-October; growing season (GS) was between 100 to 150 days. The BGS spatial pattern was embodied by a transition from southeast to northwest; vertical zonation in the mountainous region showed a contrary trend in EGS and GS. Spatio-temporal variation of vegetation phenology at the whole watershed level showed spatial heterogeneity under climate change, but mean BGS trends were not pronounced during the study period. EGS was advanced approximately 6.4 days and GS prolonged by 8.9 days. Vegetation phenology was also affected by vegetation degradation. BGS tended to be later when vegetation flourished and advanced when vegetation was degraded. The relationship between annual EGS date and vegetation degradation was relatively complex. EGS and vegetation degradation were significantly negatively correlated indicating EGS was earlier where the vegetation was in good condition.

李广泳, 姜翠红, 程滔, 张浩然, 陈占涛. 青海湖流域植被物候格局时空动态变化及其与植被退化的关系[J]. 草业学报, 2016, 25(1): 22-32.

LI Guang-Yong, JIANG Cui-Hong, CHENG Tao, ZHANG Hao-Ran, CHEN Zhan-Tao. Spatial-temporal variation of vegetation phenology and their relationships with vegetation degradation in a Qinghai Lake watershed[J]. Acta Prataculturae Sinica, 2016, 25(1): 22-32.

参考文献

[1] Zhang X Y, Friedl M A, Schaaf C B, et al . Monitoring vegetation phenology using MODIS. Remote Sensing of Environment, 2003, 84: 471-475.
[2] Peñuelas J, Biel C, Rutishauser T, et al . Phenology feedbacks on climate change. Science, 2009, 324: 887-888.
[3] Wu Y F, He C Y, Ma Y, et al . The comparison of the current remote sensing based vegetation greenup detection methods with the computer simulation. Advances in Earth Science, 2005, 20(7): 724-731.
[4] Richardson A D, Keenan T F, Migliavacca M, et al . Climate change, phenology, and phonological congtol of vegetation feedbacks to the climate system. Agricultural and Forest Meteorology, 2013, 169: 156-173.
[5] Chen X Q, Hu B, Yu R. Spatial and temporal variation of phenological growing season and climate change impacts in temperate eastern China. Global Change Biology, 2005, 11: 1118-1130.
[6] Liu J, Zheng Y F, Zhao G Q, et al . Responsed of phenology to climate change in Zhengzhou area. Acta Ecologica Sinica, 2007, 27(4): 1471-1479.
[7] Yu H Y, Luedeling E, Xua J C. Winter and spring warming resulting in delayed spring phenology on the Tibetan Plateau. Proceeding of the National Academy of Sciences, 2010, 107(51): 22151-22156.
[8] Song C Q, You S C, Ke L H, et al . Phenological variation of typical vegetation types in northern Tibet and its response to climate changes. Acta Ecologica Sinica, 2012, 32(4): 1045-1055.
[9] Alessandri A, Gualdi S, Polcher J, et al . Effects of land surface vegetation on the boreal summer surface climate of a GCM. Journal of Climate, 2007, 20: 255.
[10] Goheen J E, Yong T P, Keesing F, et al . Consequences of herbivory by native ungulates for the reproduction of a savanna tree. Journal of Ecology, 2007, 95: 129-138.
[11] Li G Y, Li X Y, Zhao G Q, et al . Characteristics of spatial and temporal phenology under the dynamic variation of grassland in the Qinghai Lake watershed. Acta Ecologica Sinica, 2014, 34(11): 3038-3047.
[12] Butt B, Turner M D, Singh A, et al . Use of MODIS NDVI to evaluate changing latitudinal gradinets of rangland phenology in Sudano-Sahelian West Africa. Remote Sensing of Environment, 2011, 115: 3367-3376.
[13] Bisigato A J, Campanella M V, Pazos G E. Plant phenology as affected by land degradation in the arid Patagonian Monte, Argentina: A multivariate approach. Journal of Arid Environments, 2013, 91: 79-87.
[14] Chen H, Zhu Q, Wu N, et al . Delayed spring phenology on the Tibetan Plateau may also be attribute to other factors than winter and spring warming. Proceeding of the National Academy of Sciences, 2011, 108(19): E93.
[15] Qiu J. The third pole. Nature, 2008, 454: 393-396.
[16] Yu H Y, Xu J C. Effects of climate change on vegetations on Qinghai-Tibet Plateau: A review. Chinese Journal of Ecology, 2009, 28(4): 747-754.
[17] Chen L, Chen K L, Liu B K, et al . Characteristics of climate variation in Qinghai Lake Basin during the recent 50 years. Journal of Arid Meteorology, 2011, 29(4): 483-487.
[18] Hao X. A green fervor sweeps the Qinghai-Tibetan Plateau. Science, 2008, 321: 633-635.
[19] Li X Y, Ma Y J, Xu H Y, et al . Impact of land use and land cover change on environmental degradation in lake Qinghai watershed, northeast Qinghai-Tibet Plateau. Land Degradation & Development, 2008, 20(1): 69-83.
[20] White M A, Thomton P E, Running S W. A continental phenology model for monitoring vegetation responses to interannual climatic variability. Global Biogeochemical Cycles, 1997, 11(2): 217-234.
[21] Stow D, Daeschner S, Hope A, et al . Variability of the seasonally integrated normalized difference vegetation index across the north slope of Alaska in the 1990s. International Journal of Remote Sensing, 2003, 24(5): 1111-1117.
[22] Chen C C, Xie G D, Zhen L, et al . Analysis of Jinghe watershed vegetation dynamics and evaluation of its relation to precipitation. Acta Ecologica Sinica, 2008, 28(3): 925-938.
[23] Wu S H, Yin Y H, Zheng D, et al . Climate change in the Tibetan Plateau during the last three decades. Acta Geographica Sinica, 2005, 60(1): 3-11.
[24] Wang L X, Chen H L, Li Q, et al . Research advances in plant phenology and climate. Acta Ecologica Sinica, 2010, 30(2): 447-454.
[25] Ding M J, Zhang Y L, Sun X M, et al . Spatiotemporal variation in alpine grassland phenology in the Qinghai-Tibetan Plateau from 1999 to 2009. Chinese Science Bulletin, 2012, 57(33): 3185-3194.
[26] Shen M G, Zhang G X, Cong N, et al . Increasing altitudinal gradient of spring vegetation phenology during the last decade on the Qinghai-Tibetan Plateau. Agricultural and Forest Meteorology, 2014, 189-190: 71-80.
[27] Li H M, Ma Y S, Wang Y L. Influences of climate warming on plant phenology in Qinghai Plateau. Journal of Applied Meterological Science, 2010, 21(4): 500-505.
[28] Ding M J, Zhang Y L, Liu L S, et al . Spatiotemporal changes of commencement of vegetation regreening and its response to climate change on Tibetan Plateau. Advances in Climate Change Research, 2011, 7(5): 317-323.
[29] Walther G R, Post E, Convey P, et al . Ecological responses to recent climate change. Nature, 2002, 416: 389-396.
[30] Jacquin A, Sheeren D, Lacombe J P. Vegetation cover degradation assessment in Madagascar savanna based on trend analysis of MODIS NDVI time series. International Journal of Applied Earth Observation and Geoinformation, 2010, 12: S3-S10.
[31] Gao H J, Li X Q, Zhang F, et al . Remote sensing monitoring study on the dynamic changes of ecological environment in Qinghai Lake area during 25 years. The Chinese Journal of Geological Hazard and Control, 2005, 16(3): 100-103.
[32] Noy-Meir I, Briske D D. Response of wild wheat populations to grazing in Mediterranean grasslands: the relative influence of defoliation, competition, mulch and genotype. Journal of Applied Ecology, 2002, 39: 259-278.
[33] Moriseete J T, Richardson A D, Knapp A K, et al . Tracking the rhythm of the seasons in the face of global change: phenological research in the 21st century. Frontiers in Ecology and the Environment, 2009, 7(5): 253-260.
[34] Gan Y M, Li Z D, Ze B, et al . The changes of grassland soil nutrition at different degradation subalpine meadow of north-west in Sichuan. Acta Prataculturae Sinica, 2005, 14(2): 38-42.
[35] Li Y K, Han F, Ran F, et al . Effect of typical alpine meadow degradation on soil enzyme and soil nutrient in source region of three rivers. Chinese Journal of Grassland, 2008, 3(4): 51-58.
[36] Lin C F, Chen Z Q, Xue Q H, et al . Effect of vegetation degradation on soil nutrients and microflora in the Sanjiangyuan region of Qinghai, China. Chinese Journal of Applied & Environmental Biology, 2007, 13(6): 788-793.
[37] Ye X, Zhou H X, Liu G H, et al . Responses of phenological characteristics of major plants to nutrient and water additions in Kobresia humilis alpine meadow. Chinese Journal of Plant Ecology, 2014, 38(2): 147-158.
[38] Hou F J, Yang Z Y. Effects of grazing of livestock on grassland. Acta Ecologica Sinica, 2006, 26(1): 244-264.
[39] Ding L M, Long R J, Guo X S, et al . Advances in studies on livestock grazing behavior in grassland ecosystem. Acta Ecologiae Animalis Domastici, 2009, 30(5): 4-9.
[40] Louault F, Garrere P, Soussana J F. Efficiencies of ryegrass and white clover herbage utilization in mixtures continuously grazed by sheep. Grass and Forage Science, 1997, 52: 288-400.
[41] Wang L H, Liu W, Wang J N, et al . The compensatory growth of plant community, synusia and species under different clipping intensity. Acta Prataculturae Sinica, 2015, 24(6): 35-42.
[42] Harrisona M T, Evans J R, Moore A D. Using a mathematical framework to examine physiological changes in winter wheat after livestock grazing. Field Crops Research, 2012, 136: 116-126.
[43] Deutsch E S, Bork E W, Willms W D. Soil moisture and plant growth responses to litter and defoliation impacts in Parkland grasslands. Agriculture, Ecosystems and Environment, 2010, 135: 1-9.
[44] Danielewska A, Urbaniak M, Olejnik J. Growing season length as a key factor of cumulative net ecosystem exchange over the pine forest ecosystems in Europe. International Agrophysics, 2015, 29: 129-135.
[45] Tong C, Wu J, Yong S, et al . A landscape-scale assessment of steppe degradation in the Xilin River Basin,Inner Mongolia, China. Journal of Arid Environments, 2004, 59: 133-149.
[46] Qi B, Zhang D G, Ding L L, et al . Properties of plant community diversity of degraded alpine arid grasslands. Journal of Gansu Agricultural University, 2005, 40(5): 626-631.
[47] Kang X F. The Characteristics of Several Dominant Plant Populations in Meadow Grassland in the North Shore of Qinghai Lake and its Correlation with Climate Factors[D]. Xining: Qinghai University, 2010.
[3] 武永峰, 何春阳, 马瑛, 等. 基于计算机模拟的植物返青期遥感监测方法比较研究. 地球科学进展, 2005, 20(7): 724-731.
[6] 柳晶, 郑有飞, 赵国强, 等. 郑州植物物候对气候变化的响应. 生态学报, 2007, 27(4): 1471-1479.
[8] 宋春桥, 游松财, 柯灵红, 等. 藏北高原典型植被样区物候变化及其对气候变化的响应. 生态学报, 2012, 32(4): 1045-1055.
[11] 李广泳, 李小雁, 赵国琴, 等. 青海湖流域草地植被动态变化趋势下的物候时空特征. 生态学报, 2014, 34(11): 3038-3047.
[16] 于海英, 许建初. 气候变化对青藏高原植被影响研究综述. 生态学杂志, 2009, 28(4): 747-754.
[17] 陈亮, 陈克龙, 刘宝康, 等. 近50a青海湖流域气候变化特征分析. 干旱气象, 2011, 29(4): 483-487.
[22] 陈操操, 谢高地, 甄霖, 等. 泾河流域植被覆盖动态变化特征及其与降雨的关系. 生态学报, 2008, 28(3): 925-938.
[23] 吴绍洪, 尹云鹤, 郑度, 等. 青藏高原近30年气候变化趋势. 地理学报, 2005, 60(1): 3-11.
[24] 王连喜, 陈怀亮, 李琪, 等. 植物物候与气候研究进展. 生态学报, 2010, 30(2): 447-454.
[25] 丁明军, 张镱锂, 孙晓敏, 等. 近10 年青藏高原高寒草地物候时空变化特征分析. 科学通报, 2012, 57(33): 3185-3194.
[27] 李红梅, 马玉寿, 王彦龙. 气候变暖对青海高原地区植被物候期的影响. 应用气象学报, 2010, 21(4): 500-505.
[28] 丁明军, 张镱锂, 刘林山, 等. 青藏高原植物返青期变化及其对气候变化的响应.气候变化研究进展, 2011, 7(5): 317-323.
[31] 高会军, 李小强, 张峰, 等. 青海湖地区生态环境动态变化遥感监测. 中国地质灾害与防治学报, 2005, 16(3): 100-103.
[34] 干友民, 李志丹, 泽柏, 等. 川西北亚高山草地不同退化梯度草地土壤养分变化. 草业学报, 2005, 14(2): 38-42.
[35] 李以康, 韩发, 冉飞, 等. 三江源区高寒草甸退化对土壤养分和土壤酶活性影响的研究. 中国草地学报, 2008, 3(4): 51-58.
[36] 林超峰, 陈占全, 薛泉宏, 等. 青海三江源区植被退化对土壤养分和微生物区系的影响. 应用与环境生物学报, 2007, 13(6): 788-793.
[37] 叶鑫, 周华坤, 刘国华, 等. 高寒矮生嵩草草甸主要植物物候特征对养分和水分添加的响应. 植物生态学报, 2014, 38 (2): 147-158.
[38] 侯扶江, 杨中艺. 放牧对草地的作用. 生态学报, 2006, 26(1): 244-264.
[39] 丁路明, 龙瑞军, 郭旭生, 等. 放牧生态系统家畜牧食行为研究进展. 家畜生态学报, 2009, 30(5): 4-9.
[41] 王丽华, 刘尉, 王金牛, 等. 不同刈割强度下草地群落、层片及物种的补偿性生长. 草业学报, 2015, 24(6): 35-42.
[46] 祁彪, 张德罡, 丁玲玲, 等. 退化高寒干旱草地植物群落多样性特征. 甘肃农业大学学报, 2005, 40(5): 626-631.
[47] 康晓甫. 青海湖北岸草甸化草原几种优势植物种群特征与气候因子的关系[D]. 西宁: 青海大学, 2010.