QQ客服 官方微博 反馈留言

	Environmental controlling mechanisms on bacterial abundance in the South China Sea inferred from generalized additive models (GAMs)
	Chen, Bingzhang ; Chen BZ(陈炳章) ; Liu, Hongbin ; Huang, Bangqin ; Huang BQ(黄邦钦)
	2012-08
关键词	Heterotrophic bacteria Generalized additive model South China Sea
英文摘要	We modeled the abundance distribution of heterotrophic bacteria collected from 4 cruises in the northern South China Sea using generalized additive models to infer the underlying mechanisms controlling bacterial abundance and to predict bacterial abundance using environmental parameters that can be easily obtained. We incorporated spatial coordinates, depth, month, chlorophyll (Chl) a concentration, temperature, salinity, nutricline and mixed layer depth in the model, which captures the main features of the observations and explains 88% of the total variation of bacterial abundance. The most important factor affecting bacterial abundance is chlorophyll, followed by salinity and nutricline depth, reflecting the importance of carbon and nutrient sources to bacteria. Bacterial abundance shows a unimodal relationship with temperature and decreases with depth. All the functions are nonlinear. After controlling environmental parameters, bacterial abundances are higher in fall and winter than in spring and summer and usually show an onshore-offshore decreasing gradient, which probably signify transportation pathways of terrestrial organic matter to the sea via atmospheric deposition. Comparisons of variograms between raw data and residuals of the model show that positive autocorrelation at small scales is induced by both environmental similarity and geographic proximity, while the negative autocorrelation at large scales is mostly contributed by environmental similarity in remote water masses. (C) 2012 Elsevier B.V. All rights reserved.; National Basic Research Program ("973" Program) of China [2009CB421203]; Fundamental Research Funds for the Central Universities of Xiamen University [2011121007, 2012121058]; State Key Laboratory of Tropical Oceanography (South China Sea Institute of Oceanology, Chinese Academy of Sciences) [LTO1103]; National Science Foundation of China [40925018, 41176112]; Hong Kong University Grant Council through the Area of Excellence program [AoE/P-04/04]; Hong Kong Research Grant Council General Research Fund [661809, 661610, 661911]; TUYF Charitable Trust [TUYF10SC08]
语种	英语
出版者	1385-1101
内容类型	期刊论文
源URL	[http://dx.doi.org/10.1016/j.seares.2012.05.012]
专题	海洋环境－已发表论文
推荐引用方式 GB/T 7714	Chen, Bingzhang,Chen BZ,Liu, Hongbin,et al. Environmental controlling mechanisms on bacterial abundance in the South China Sea inferred from generalized additive models (GAMs)[J],2012.
APA	Chen, Bingzhang,陈炳章,Liu, Hongbin,Huang, Bangqin,&黄邦钦.(2012).Environmental controlling mechanisms on bacterial abundance in the South China Sea inferred from generalized additive models (GAMs)..
MLA	Chen, Bingzhang,et al."Environmental controlling mechanisms on bacterial abundance in the South China Sea inferred from generalized additive models (GAMs)".(2012).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。