Microtopography-induced ecohydrological effects alter plant community structure

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 城市与区域生态国家重点实验室

	Microtopography-induced ecohydrological effects alter plant community structure
	Liu, Yali; Du, Jianqing; Xu, Xingliang; Kardol, Paul; Hu, Dan
刊名	GEODERMA
	2020-03-15
卷号	362 页码:1-16
关键词	Microtopography Resource heterogeneity Resource diversity Ecohydrology Plant community
ISSN号	0016-7061
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.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44384]
专题	生态环境研究中心_城市与区域生态国家重点实验室
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,2020,362:1-16.
APA	Liu, Yali,Du, Jianqing,Xu, Xingliang,Kardol, Paul,&Hu, Dan.(2020).Microtopography-induced ecohydrological effects alter plant community structure.GEODERMA,362,1-16.
MLA	Liu, Yali,et al."Microtopography-induced ecohydrological effects alter plant community structure".GEODERMA 362(2020):1-16.