Microtopography-induced ecohydrological effects alter plant community structure

doi:10.1016/j.geoderma.2019.114119

	Microtopography-induced ecohydrological effects alter plant community structure
	Liu, Yali 1,3; Du, Jianqing 1; Xu, Xingliang 4; Kardol, Paul 2; Hu, Dan 1,3
刊名	GEODERMA
	2020-03-15
卷号	362 页码:9
关键词	Microtopography Resource heterogeneity Resource diversity Ecohydrology Plant community
ISSN号	0016-7061
DOI	10.1016/j.geoderma.2019.114119
通讯作者	Hu, Dan(hudan@rcees.ac.cn)
英文摘要	Microtopography affects radiation, reflection, and hydrological processes, thereby forming different microhabitats. This study aimed to determine how these processes influence the plot-scale ecosystem (similar to 0.1-1000 m(2)). Soil was sampled at 0-10 cm and 10-25 cm on depressions, gentle and steep slopes, and gullies on an artificial hillslope. Moisture, temperature, ammonium, nitrate, and plant-available phosphorus (P) were measured. Plant species distributions were evaluated using quadrats and plant nitrogen (N) and P were quantified. Resource richness, evenness, and diversity were compared for all microtopographies. Seasonal dynamics of moisture, nitrate, and available phosphorus indicate that leaching processes shape resource heterogeneity at the plot-scale. Soil nutrient levels widely differed among microtopographies during the non-growing season, but these differences decreased during the growing season. Elevated soil nitrate (but not available P) increased plant nitrate and N:P ratios on steep slopes. Higher soil available P on steep slopes was associated with an increase in the relative abundance of legumes, and subsequently stimulated the accumulation of soil N. The hydrological pathway contributed towards shaping plant community structure by regulating soil resource distribution across micro topographies. In conclusion, this study demonstrated that slight differences in microtopography (e.g., gentle versus steep slopes) alter the soil environment and plant community; therefore, sampling and treatments should be implemented under similar microtopographic conditions to avoid heterogeneity, even at such small scales.
资助项目	National Natural Science Foundation of China[41571482] ; CAS[XDA20050104]
WOS关键词	SOIL-MOISTURE ; SPECIES DIVERSITY ; ENZYME-ACTIVITIES ; N MINERALIZATION ; LAND-USE ; GRASSLAND ; TOPOGRAPHY ; NITRATE ; TEMPERATURE ; PHOSPHORUS
WOS研究方向	Agriculture
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000514019700007
资助机构	National Natural Science Foundation of China ; CAS
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/132899]
专题	中国科学院地理科学与资源研究所
通讯作者	Hu, Dan
作者单位	1.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 2.Swedish Univ Agr Sci, Dept Forest Ecol & Management, S-90183 Umea, Sweden 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, 18 Shuangqing Rd, Beijing 100085, Peoples R China 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, 11A Datun Rd, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Liu, Yali,Du, Jianqing,Xu, Xingliang,et al. Microtopography-induced ecohydrological effects alter plant community structure[J]. GEODERMA,2020,362:9.
APA	Liu, Yali,Du, Jianqing,Xu, Xingliang,Kardol, Paul,&Hu, Dan.(2020).Microtopography-induced ecohydrological effects alter plant community structure.GEODERMA,362,9.
MLA	Liu, Yali,et al."Microtopography-induced ecohydrological effects alter plant community structure".GEODERMA 362(2020):9.