气候变化领域集成服务门户(CCPortal): Influences of the landscape pattern on riverine nitrogen exports derived from legacy sources in subtropical agricultural catchments

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DOI	10.1007/s10533-020-00744-w
	Influences of the landscape pattern on riverine nitrogen exports derived from legacy sources in subtropical agricultural catchments
	Meng C.; Liu H.; Li Y.; Wang Y.; Li X.; Shen J.; Fan X.; Li Y.; Wu J.
发表日期	2021
ISSN	1682563
起始页码	161
结束页码	177
卷号	152 期号:2021-02-03
英文摘要	Changes in the landscape pattern can disturb legacy nitrogen (N) release by influencing hydrological and biogeochemical processes; thus, understanding the effects of landscape patterns on riverine N exports from legacy sources is critical for preparing water quality improvement strategies. In this study, an empirical statistical model that incorporates the net anthropogenic nitrogen input (NANI), runoff coefficient, and residential land area percentage was used to quantify the contribution of legacy sources to annual riverine ammonium nitrogen (NH4+–N), nitrate nitrogen (NO3−–N), and total nitrogen (TN) exports in eight adjacent agricultural catchments in subtropical southern China. The results indicated that annual riverine NH4+–N, NO3−–N, and TN exports from legacy sources ranged from 0.36–1.03, 3.09–4.89, and 3.94–6.79 kg ha−1 year−1, respectively, during the 2012–2017 period. Redundancy analysis (RDA) was used to analyze the interactions between legacy N release and landscape metrics at both the landscape and class levels. The RDA results suggested that higher dispersion, lower shape complexity, and greater heterogeneity in landscape patches can enhance the release of legacy N at the landscape level. In agricultural and residential areas, higher release of legacy N was associated with patches that are unfragmented and have a low shape complexity, whereas in woodland areas, the opposite was true. These analyses provide scientific support for preparing legacy N control strategies from the perspective of landscape ecology. © 2021, The Author(s), under exclusive licence to Springer Nature Switzerland AG part of Springer Nature.
英文关键词	Landscape pattern; Legacy nitrogen; Net anthropogenic nitrogen inputs; Riverine nitrogen exports; Sources catchment; Subtropics
语种	英语
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184628
作者单位	Changsha Research Station for Agricultural and Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, No. 644, the Second Yuanda Road, Furong District, Changsha, 410125, China; Key Laboratory of Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China; University of Chinese Academy of Sciences, Beijing, 10049, China; College of Resources & Environment, Hunan Agricultural University, Changsha, 410128, China; College of Water Resources & Civil Engineering, Hunan Agricultural University, Changsha, 410128, China
推荐引用方式 GB/T 7714	Meng C.,Liu H.,Li Y.,et al. Influences of the landscape pattern on riverine nitrogen exports derived from legacy sources in subtropical agricultural catchments[J],2021,152(2021-02-03).
APA	Meng C..,Liu H..,Li Y..,Wang Y..,Li X..,...&Wu J..(2021).Influences of the landscape pattern on riverine nitrogen exports derived from legacy sources in subtropical agricultural catchments.Biogeochemistry,152(2021-02-03).
MLA	Meng C.,et al."Influences of the landscape pattern on riverine nitrogen exports derived from legacy sources in subtropical agricultural catchments".Biogeochemistry 152.2021-02-03(2021).