黄海北部四十里湾近岸水质时空变化特征

IF 0.8 4区 环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES Aquatic Ecosystem Health & Management Pub Date : 2019-01-02 DOI:10.1080/14634988.2018.1525264
Zhijun Dong, Dongyan Liu, Yujue Wang, B. Di
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引用次数: 9

摘要

采用不同的化学计量方法来确定中国烟台附近黄海北部沿海水质时空变化的一般模式。分层聚类分析将16个月分为两个时期(即3月至10月和11月至2月),反映了数据的强烈季节性,并根据水质特征的相似性将12个采样点分为两组(即烟台湾外和烟台湾内)。判别分析在时间分析中给出了降低数据复杂度的最佳结果,但在空间分析中没有。判别分析确定了五个重要参数(水温、盐度和溶解无机氮、溶解无机磷酸盐和溶解硅酸盐的浓度),在时间分析中提供了约97.9%的正确分配。此外,主成分分析确定了三个变量,解释了沿海水质数据集中71%的时间变化。总体而言,本研究表明,这些多元统计方法对评价烟台沿海水质的时空变化是有效的。水温和营养物质输入可能是这些沿海水域营养状况的主要驱动因素。烟台市水质参数空间格局的低方差主要与泗里湾与黄海之间不受限制的水交换有关。
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Temporal and spatial variations of coastal water quality in Sishili Bay, northern Yellow Sea of China
Different chemometric approaches were used to determine generic patterns in the temporal and spatial variations in the coastal water quality of the northern Yellow Sea off Yantai, China. Hierarchical cluster analysis grouped the 16 months into two periods (i.e. March-October and November-February), reflecting strong seasonality in the data, and grouped the 12 sampling sites into two clusters (i.e. outside Yantai Bay and inside Yantai Bay), based on similarities in water quality characteristics. Discriminant analysis gave the best results for data complexity reduction during temporal analysis, but not during spatial analysis. Discriminant analysis identified five significant parameters (water temperature, salinity, and concentrations of dissolved inorganic nitrogen, dissolved inorganic phosphate and dissolved silicate) affording about 97.9% correct assignations in temporal analysis. In addition, principal component analysis identified three varifactors that explained 71% of temporal changes in the coastal water quality data set. Overall, the present study showed that these multivariate statistic methods were effective for evaluating temporal and spatial variations in the coastal water quality of Yantai. Water temperature and nutrient inputs may be major driving factors for the trophic status of these coastal waters. Low variances in spatial patterns of water quality parameters of Yantai were mostly related to the unrestricted water exchange between Sishili Bay and the Yellow Sea.
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来源期刊
Aquatic Ecosystem Health & Management
Aquatic Ecosystem Health & Management 环境科学-海洋与淡水生物学
CiteScore
1.70
自引率
0.00%
发文量
1
审稿时长
18-36 weeks
期刊介绍: The journal publishes articles on the following themes and topics: • Original articles focusing on ecosystem-based sciences, ecosystem health and management of marine and aquatic ecosystems • Reviews, invited perspectives and keynote contributions from conferences • Special issues on important emerging topics, themes, and ecosystems (climate change, invasive species, HABs, risk assessment, models)
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