黄土高原草地土壤水分和物种多样性沿降水梯度的分布格局
Spatial Variation of Soil Moisture and Species Diversity Patterns along a Precipitation Gradient in the Grasslands of the Loess Plateau
查看参考文献51篇
|
文摘
|
研究土壤水分、生物多样性的空间变异性是认识陆地生态系统对降水变化的响应特征及适应机制的有效途径。论文利用黄土高原自东南向西北的天然降水梯度,采用样带研究方法对47个草地0~3 m土壤水分和物种多样性进行测定,系统分析了草地土壤水分和植物物种多样性在降水梯度上(250~550 mm)的空间分异及二者之间的权衡关系。结果表明:降水自东南向西北递减是控制黄土高原草地0~3 m土壤水分和物种多样性空间异质性的关键因素。随降雨减少,土壤水分呈线性递减趋势,其中浅层土壤水分(0~1 m)与年降水量相关系数最大。物种丰富度指数和物种多样性指数随降水减少呈显著的线性递减趋势,物种均匀度指数在降水梯度上没有明显变化。370 mm年均降水量是物种多样性和土壤水分权衡关系的转折点,转折点以上二者存在协同关系,即土壤水分和物种多样性沿降水梯度以相同速率变化。370 mm年均降水量以下,物种多样性和土壤水分的权衡增大,意味着维持物种多样性以消耗土壤水分为代价。 |
|
其他语种文摘
|
The spatial variations of soil moisture and biodiversity have become central issues in ecohydrology which contribute to the understanding of the response of terrestrial ecosystem to precipitation change in water-limited areas.Based a precipitation gradient (250-550 mm) in the Loess Plateau,vertical soil moisture (0-3 m) and species diversity at 47 grassland sites across a southeast-northwest transect were surveyed.The spatial variations of soil moisture and species diversity were evaluated,and the tradeoff between them along the precipitation gradient was quantified.Results showed great variation of soil moisture in the vertical profiles along the precipitation gradient.Significant linear correlation existed between the average soil moisture of the profile and the mean annual precipitation,and the soil moisture in the shallow layer (0-1 m) was affected more greatly by mean annual precipitation.The Patrick index and Shannon- Wiener diversity index also showed positive linear correlation with precipitation,however,Pielou evenness index did not (P>0.05).The linear piece-wise quantile regression was applied to determine the inflection points of the response of tradeoff between species diversity and soil moisture to the precipitation gradient.It revealed obvious trend of the tradeoff along the precipitation gradient.The inflection point of the tradeoff was detected at the mean annual precipitation of 370 mm.Under the 370 mm annual mean precipitation,soil moisture constrains species diversity in the relatively arid regions,while the synergy between soil moisture and species diversity exists in the relatively humid regions in this study.This suggests species maintaining in the relatively arid regions is at the cost of soil water.The results demonstrate that the precipitation gradient determined the tradeoff between soil moisture and species diversity in the grasslands of the Loess Plateau.Consequently,this tradeoff could be an ecological indicator and tool for restoration management in the Loess Plateau. |
|
来源
|
自然资源学报
,2018,33(8):1351-1362 【核心库】
|
|
DOI
|
10.31497/zrzyxb.20170726
|
|
关键词
|
土壤水分
;
物种多样性
;
降水梯度
;
权衡分析
;
黄土高原
|
|
地址
|
1.
中国科学院生态环境研究中心, 城市与区域国家重点实验室, 北京, 100085
2.
山西师范大学生命科学学院, 山西, 临汾, 041004
3.
中国科学院大学, 北京, 100049
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
1000-3037 |
|
学科
|
植物学 |
|
基金
|
国家自然科学基金项目
;
国家重点研发计划专项
;
国家“十二五”科技支撑计划项目
|
|
文献收藏号
|
CSCD:6312337
|
参考文献 共
51
共3页
|
|
1.
Huxman T E. Convergence across biomes to a common rain-use efficiency.
Nature,2004,429(6992):651-654
|
CSCD被引
98
次
|
|
|
|
|
2.
Schimel D S. Recent patterns and mechanisms of carbon recent patterns and mechanisms of carbon exchange by terrestrial ecosystems.
Nature,2001,414(6860):169-172
|
CSCD被引
237
次
|
|
|
|
|
3.
Yahdjian L. Vegetation structure constrains primary production response to water availability in the Patagonian steppe.
Ecology,2006,87(4):952-962
|
CSCD被引
27
次
|
|
|
|
|
4.
Knapp A K. Rainfall variability, carbon cycling, and plant species diversity in a mesic grassland.
Science,2002,298(5601):2202-2205
|
CSCD被引
127
次
|
|
|
|
|
5.
Su C H. Evolution of ecosystem services in the Chinese Loess Plateau under climatic and land use changes.
Global and Planetary Change,2013,101:119-128
|
CSCD被引
93
次
|
|
|
|
|
6.
孟莹莹. 长白山风倒区植被恢复26年后物种多样性变化特征.
生态学报,2015,35(1):142-149
|
CSCD被引
22
次
|
|
|
|
|
7.
武建双. 藏北高寒草地样带物种多样性沿降水梯度的分布格局.
草业学报,2012,21(3):17-25
|
CSCD被引
51
次
|
|
|
|
|
8.
岳静. 物种多样性-生态系统功能关系的影响因素.
草业科学,2011,28(4):532-535
|
CSCD被引
9
次
|
|
|
|
|
9.
马文静. 物种多样性和功能群多样性与生态系统生产力的关系——以内蒙古短花针茅草原为例.
植物生态学报,2013,37(7):620-630
|
CSCD被引
56
次
|
|
|
|
|
10.
Loreau M. Biodiversity and ecosystem functioning:Current knowledge and future challenges.
Science,2001,294(5543):804-808
|
CSCD被引
382
次
|
|
|
|
|
11.
Maestre F T. Plant species richness and ecosystem multifunctionality in global drylands.
Science,2012,335(6065):214-218
|
CSCD被引
104
次
|
|
|
|
|
12.
赵新风. 养分与水分添加对荒漠草地植物群落结构和物种多样性的影响.
植物生态学报,2014,38(2):167-177
|
CSCD被引
63
次
|
|
|
|
|
13.
Adler P B. Contrasting relationships between precipitation and species richness in space and time.
Oikos,2007,116(2):221-232
|
CSCD被引
24
次
|
|
|
|
|
14.
辛智鸣. 乌兰布和沙漠白刺与沙蒿群落多样性及其对降水的响应.
河南农业科学,2015,44(1):117-120
|
CSCD被引
6
次
|
|
|
|
|
15.
李文娇. 氮素和水分添加对贝加尔针茅草原植物多样性及生物量的影响.
生态学报,2015,35(19):6460-6469
|
CSCD被引
49
次
|
|
|
|
|
16.
贺金生. 陆地植物群落物种多样性的梯度变化特征.
生态学报,1997,17(1):91-99
|
CSCD被引
215
次
|
|
|
|
|
17.
Willis K J. Species diversity:Scale matters.
Science,2002,295(5558):1245-1248
|
CSCD被引
63
次
|
|
|
|
|
18.
Glenn-Lewin D C. Species diversity in North American temperate forests.
Plant Ecology,1977,33(2):153-162
|
CSCD被引
16
次
|
|
|
|
|
19.
李小雁. 干旱地区土壤-植被-水文耦合、响应与适应机制.
中国科学(地球科学),2011,21(12):1721-1730
|
CSCD被引
91
次
|
|
|
|
|
20.
Rodriguez-Iturbe I.
Ecohydrology of Water-Controlled Ecosystems,2004
|
CSCD被引
1
次
|
|
|
|
|
了解气象卫星更多信息，请访问