Journal of Sea Research最新文献

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Observed current variations in the Bohai Sea in the winter of 2020/2021 2020/2021年冬季渤海海流变化观测
IF 2 4区 地球科学
Journal of Sea Research Pub Date : 2023-10-13 DOI: 10.1016/j.seares.2023.102450
Zizhou Liu , Fangguo Zhai , Yanzhen Gu
{"title":"Observed current variations in the Bohai Sea in the winter of 2020/2021","authors":"Zizhou Liu ,&nbsp;Fangguo Zhai ,&nbsp;Yanzhen Gu","doi":"10.1016/j.seares.2023.102450","DOIUrl":"https://doi.org/10.1016/j.seares.2023.102450","url":null,"abstract":"<div><p>Hydrodynamic conditions in the Bohai Sea (BS) play an important role in regulating variabilities in the regional climate and marine ecosystem. In the current study, wintertime current variations in the BS were investigated using continuous in situ observations at two sites in the western BS (<em>S1</em>) and southeastern BS (<em>S2</em>) from November/December 2020 to March 2021. The results indicated that residual currents and their variations were both stronger at <em>S1</em> than at <em>S2</em>. Residual currents had notable vertical variations, with nearly opposite directions in the upper and lower layers. Upper layer residual currents were mostly southeastward at both sites, while lower layer residual currents were basically west-northwestward at <em>S2</em> following the topography in the deep trough in the South BS but were north-northwestward at <em>S1</em> up the slope to the coast. Upper layer residual currents were strongly subsurface-intensified and experienced significant intraseasonal variations. Subsurface currents in the upper layer shifted from being weak in December 2020 to strong in January–February 2021, especially in the western BS. Surface currents were directly driven by surface winds following the Ekman layer dynamics in shallow waters. Weak/strong subsurface currents occurred during/after sustained strong sea surface winds, implying that they experienced more complex dynamics than surface currents. This study provides new understanding to the wintertime circulation pattern in the BS. It is helpful for fully understanding the characteristics and underlying dynamics of the BS circulation variations in winter and their impacts on biogeochemical processes.</p></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1385110123001193/pdfft?md5=8a402aec8acd14c1e5494717aac54819&pid=1-s2.0-S1385110123001193-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92033248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mangroves' role in supporting ecosystem-based techniques to reduce disaster risk and adapt to climate change: A review 红树林在支持基于生态系统的技术以减少灾害风险和适应气候变化方面的作用:综述
IF 2 4区 地球科学
Journal of Sea Research Pub Date : 2023-10-04 DOI: 10.1016/j.seares.2023.102449
Reshma Sunkur , Komali Kantamaneni , Chandradeo Bokhoree , Shirish Ravan
{"title":"Mangroves' role in supporting ecosystem-based techniques to reduce disaster risk and adapt to climate change: A review","authors":"Reshma Sunkur ,&nbsp;Komali Kantamaneni ,&nbsp;Chandradeo Bokhoree ,&nbsp;Shirish Ravan","doi":"10.1016/j.seares.2023.102449","DOIUrl":"https://doi.org/10.1016/j.seares.2023.102449","url":null,"abstract":"<div><p>Variations due to climate change like rising sea levels, recurring storm surges and changing wave conditions coupled with unsustainable development along the coast are exacerbating coastal populations' vulnerability to coastal dangers globally. The ecosystem based solution to achieve sustainable development is increasingly advocated in the last two decades to leverage nature's robust adaptive capacity to change and protect people against its negative consequences. Mangroves protect and maintain a rich marine biodiversity in the tropics and subtropics and are crucial carbon sinks. The present study thus analyses mangroves' role as ecosystem-based technique to reduce disaster risk and adapt to climate change using Mauritius, a small island state, as case study, particularly the coastal protective and climate change adaptive capacities of the two local species <em>Rhizophora mucronata</em> Lam. and <em>Bruguiera gymnorrhiza</em> (L.) Lam. The PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines were used to retrieve resources from Google Scholar, Web of Science and ScienceDirect for the 2002 to 2022 period. A total of 41,789 records were identified and through a robust screening and filtering process only 50 studies were deemed relevant to the present study. In this context, key attributes of mangrove forests were found to be in reducing coastal flood risk, sheltering coastal regions during storms and stabilizing the coast. This study lays the foundation to consider <em>Rhizophora</em> and <em>Brugueira</em> as robust nature based solutions for Mauritius which will be of key importance to decision makers, researchers and the public at large to consider restoring degraded mangrove sites and promote ecosystem-based approaches to reduce disaster risk, adapt to climate change, enhance marine spatial planning and better coastal zone management.</p></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49865423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Spatial and temporal variability of phytoplankton dynamics in-relation to essential oceanographic variables in the south east coast of Bangladesh 孟加拉国东南海岸浮游植物动态与基本海洋学变量的时空变化
IF 2 4区 地球科学
Journal of Sea Research Pub Date : 2023-10-01 DOI: 10.1016/j.seares.2023.102438
Subrata Sarker , Shashowti Chowdhury Riya , Md Jalilur Rahman , A.N.M. Samiul Huda , Md. Shahadat Hossain , Nabanita Das
{"title":"Spatial and temporal variability of phytoplankton dynamics in-relation to essential oceanographic variables in the south east coast of Bangladesh","authors":"Subrata Sarker ,&nbsp;Shashowti Chowdhury Riya ,&nbsp;Md Jalilur Rahman ,&nbsp;A.N.M. Samiul Huda ,&nbsp;Md. Shahadat Hossain ,&nbsp;Nabanita Das","doi":"10.1016/j.seares.2023.102438","DOIUrl":"10.1016/j.seares.2023.102438","url":null,"abstract":"<div><p>Phytoplankton form the base of food chain and play a key role in maintaining the global climate system. However, very limited knowledge is available about the phytoplankton ecology of Bangladesh coast which is a representation of sub-tropical coastal ecosystem. Thus, this study aimed to understand the spatial and temporal variability of phytoplankton community in-relation to environmental variables in the South East coast of Bangladesh. Monthly data on essential oceanographic variables (i.e. temperature, salinity, dissolved oxygen, turbidity, silicate, nitrate and phosphate) and phytoplankton species abundance were collected from January 2022 to December 2022. We found a strong spatial and temporal variability in essential oceanographic variables and phytoplankton community compositions in Naf – Saint Martin Peninsula of Bangladesh. Estuarine ecosystem is characterized by high nutrients and low salinity while offshore ecosystem was found with comparatively low nutrients and high salinity. About 154 phytoplankton species were identified from the study area through year round sampling events. In the estuarine ecosystem <em>Skeletonema marino</em>, <em>Coscinodiscus centralis, Coscinodiscus argus</em> and <em>Coscinodiscus traducens</em> were found as the major contributing species at the estuarine ecosystem while <em>Chaetoceros radican</em>, <em>Tripos trichoceros</em>, <em>Cylindrotheca Closterium</em>, <em>Chaetoceros convulutus</em>, <em>Tripos muelleri</em>, and <em>Cyclotella striata</em> were found as the major contributing species at the offshore ecosystem. Our study found that 6 explanatory variables (i.e. temperature, salinity, turbidity, silicate, nitrate and phosphate) jointly explained about 78% variability in phytoplankton community dynamics. Nitrate concentration explained maximum variability (19%) followed by phosphate (17%), salinity (15%), silicate (12%), turbidity (10%) and surface temperature (5%). This study will play a key role in understanding the spatial and temporal variability of phytoplankton dynamics in the sub-tropical coastal ecosystem.</p></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49563141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Does Spartina invasion affect the carbohydrate assimilation of polychaetes in mangroves? A case study in the Zhangjiang Estuary Mangrove National Nature Reserve 米草属植物的入侵是否影响红树林中多毛类的碳水化合物同化?以张江口红树林国家级自然保护区为例
IF 2 4区 地球科学
Journal of Sea Research Pub Date : 2023-10-01 DOI: 10.1016/j.seares.2023.102435
Feijie Wang , Xinjia Sun , Yue Zhao , Haolin Wang , Xiaoying Song , Shudong Wei , Hui Chen
{"title":"Does Spartina invasion affect the carbohydrate assimilation of polychaetes in mangroves? A case study in the Zhangjiang Estuary Mangrove National Nature Reserve","authors":"Feijie Wang ,&nbsp;Xinjia Sun ,&nbsp;Yue Zhao ,&nbsp;Haolin Wang ,&nbsp;Xiaoying Song ,&nbsp;Shudong Wei ,&nbsp;Hui Chen","doi":"10.1016/j.seares.2023.102435","DOIUrl":"10.1016/j.seares.2023.102435","url":null,"abstract":"<div><p>Carbohydrates, which form a large pool of carbon in plant litter, are a major driver of litter dynamics and benthic food webs in <em>Spartina</em>-invaded mangrove ecosystems. However, there are large gaps in knowledge regarding the effects of exotic leaf litter carbohydrates on benthic carbon assimilation. In this study, the dynamics of carbohydrates, including cellulose, lignin and monosaccharides (glucose, mannose, galactose, xylose and arabinose), during the leaf litter decomposition of the exotic <em>Spartina alterniflora</em> (SA) and the native mangrove plant <em>Kandelia obovata</em> (KO) were analyzed and compared. Meanwhile, the differences in the δ<sup>13</sup>C values of cellulose and lignin were used to analyze the utilization of leaf litter carbohydrates by polychaetes after <em>Spartina</em> invasion. Our results showed that the decomposition rate of exotic SA leaf litter was lower than that of KO leaf litter. The contents of cellulose, glucose and galactose in SA leaf litter were higher than those in KO leaf litter (<em>P</em> &lt; 0.05). The decomposition rates of cellulose and monosaccharides (arabinose, xylose, mannose and galactose) in KO leaf litter were faster than those in SA leaf litter (<em>P</em> &lt; 0.05). However, there was no significant difference in the decomposition rates of lignin in the leaf litter between exotic SA leaf litter and native KO leaf litter (<em>P</em> &gt; 0.05). In the native KO plot, the carbohydrates of KO leaf litter contributed to &gt;55% (cellulose, 26.91–28.02%; lignin, 28.05–28.64%) of the organic carbon sources of polychaetes. However, in the exotic SA plot, the carbohydrates of exotic SA leaf litter contributed to &gt;65% (cellulose, 36.83–38.30%; lignin, 28.47–30.52%) of the organic carbon sources of polychaetes. The obtained results suggested that <em>Spartina</em> invasion increased the assimilation of cellulose by polychaetes. The high content and low decomposition rate of cellulose in the carbohydrates of exotic SA leaf litter might be important mechanisms for the carbon assimilation changes in the benthos of <em>Spartina-</em>invaded mangrove ecosystems. Given that <em>Spartina</em> has colonized in the Zhangjiang Estuary Mangrove Reserve, this study provides a theoretical basis for the recovery of benthos after ecological restoration. Furthermore, the mechanisms of carbohydrate assimilation by different benthos of different ecosystems should be comprehensively considered in the future.</p></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41609879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Assessing the impact factors and corresponding weights affecting the coastal morphology of Hsinchu Coast, Taiwan 台湾新竹海岸形态之影响因子及权重之评估
IF 2 4区 地球科学
Journal of Sea Research Pub Date : 2023-10-01 DOI: 10.1016/j.seares.2023.102432
Wei Po Huang, Jui Chan Hsu, Chun Jhen Ye
{"title":"Assessing the impact factors and corresponding weights affecting the coastal morphology of Hsinchu Coast, Taiwan","authors":"Wei Po Huang,&nbsp;Jui Chan Hsu,&nbsp;Chun Jhen Ye","doi":"10.1016/j.seares.2023.102432","DOIUrl":"10.1016/j.seares.2023.102432","url":null,"abstract":"<div><p>This study investigates the long-term morphological pattern of the Hsinchu coast in northwestern Taiwan using three different methods: long-term isobath and shoreline change analysis, bathymetric volume change analysis, and the empirical orthogonal function (EOF) method. Our objectives include analyzing and understanding the effects of anthropogenic structures, natural processes, and their combined impacts on coastal morphological change. The shoreline analysis and bathymetric volume analysis briefly reveal that the morphological pattern of Hsinchu coast. Then, EOF analysis is applied to identify the dominant impact factors affecting the coastal morphology near the harbor, determine the weights of the impact factors, and infer the impact range of anthropogenic structures. Moreover, the EOF analysis is divided into two-time segments—namely, the periods 2005–2010 and 2017–2021—based on different bathymetric surveys and the corresponding values of impact factors. The primary and secondary EOF modes are strongly linked to the “interaction between wave and structure” and “interaction between river discharges and structure”, respectively. The spatial components of the EOF modes demonstrate that the impact range influenced by river discharges was mainly located in the northern part of the harbor, while the minimum impact range of the structures on coastal morphological interaction changes under natural factors was 3.5 km south of Hsinchu Fishing Harbor.</p></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42610258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Statistical characteristics of sea surface waves derived from buoy measurements in the eastern Guangdong offshore water 粤东近海浮标测量海面波浪的统计特征
IF 2 4区 地球科学
Journal of Sea Research Pub Date : 2023-10-01 DOI: 10.1016/j.seares.2023.102440
Tongmu Liu , Jianxing Yu , Yang Yu , Hua Huang , Xinwen Zhang , Baocheng Zhou
{"title":"Statistical characteristics of sea surface waves derived from buoy measurements in the eastern Guangdong offshore water","authors":"Tongmu Liu ,&nbsp;Jianxing Yu ,&nbsp;Yang Yu ,&nbsp;Hua Huang ,&nbsp;Xinwen Zhang ,&nbsp;Baocheng Zhou","doi":"10.1016/j.seares.2023.102440","DOIUrl":"10.1016/j.seares.2023.102440","url":null,"abstract":"<div><p>The wave characteristics of the eastern Guangdong offshore water were quantified based on 1-year wave observations at a water depth of 60 m. This study statistically analyzed the observed wave characteristics and quantified the variations of the wave parameters and spectrum due to Super Typhoon Mangkhut. Results showed that the dominant and strong wave directions in the northeastern South China Sea were north-eastern and eastern, respectively. The average significant wave height was in the range of 0.7–2.4 m. During Super Typhoon Mangkhut, the maximum wave height and period were 11.3 m and 10–12 s, respectively, and peak spectral density mainly varied between 0.06 and 0.1 Hz. Results of this study can provide a basis for offshore engineering design and are of great significance for marine forecasting and disaster prevention and reduction.</p></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43246411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An improved sea surface salinity retrieval algorithm for the Chinese Bohai Sea based on hyperspectral reconstruction and its applicability analysis 基于高光谱重建的渤海海面盐度检索改进算法及其适用性分析
IF 2 4区 地球科学
Journal of Sea Research Pub Date : 2023-10-01 DOI: 10.1016/j.seares.2023.102437
Jialin Bi , Yan Liu , Xiangsheng Kong , Liping Wang , Xiaoyu Cai , Liangkun Nie , Chao Zhan , Guoqing Li , Fuxi Wang , Xiaohui Wang , Xianbin Liu , Xiang Yu
{"title":"An improved sea surface salinity retrieval algorithm for the Chinese Bohai Sea based on hyperspectral reconstruction and its applicability analysis","authors":"Jialin Bi ,&nbsp;Yan Liu ,&nbsp;Xiangsheng Kong ,&nbsp;Liping Wang ,&nbsp;Xiaoyu Cai ,&nbsp;Liangkun Nie ,&nbsp;Chao Zhan ,&nbsp;Guoqing Li ,&nbsp;Fuxi Wang ,&nbsp;Xiaohui Wang ,&nbsp;Xianbin Liu ,&nbsp;Xiang Yu","doi":"10.1016/j.seares.2023.102437","DOIUrl":"10.1016/j.seares.2023.102437","url":null,"abstract":"<div><p>Salinity is regarded as a critical factor in marine systems. It is essential to monitor the long-term changes in sea surface salinity (SSS), as well as its short-term changes. Along these lines, in this work, to monitor the hourly, daily, and monthly changes in SSS in the Chinese Bohai Sea from GOCI (Geostationary Ocean Color Imager) images, the feasibility of adopting a MERIS-based SSS retrieval algorithm was systematically explored to develop a GOCI-based SSS retrieval algorithm. To avoid the influence of the atmospheric correction error on <em>R</em><sub><em>rs</em></sub>(<em>λ</em>) of the similar bands of MERIS (490 nm, 560 nm, and 665 nm) and those of GOCI (490 nm, 555 nm, and 660 nm), a simple linear regression model was applied based on the <em>ρ</em><sub><em>rs</em></sub>(<em>λ</em>) matchup of the similar bands by using a hyperspectral reconstruction method with the measured <em>ρ</em>(<em>λ</em>). Despite the aerosol-based scattering errors, a more reasonable result (R<sup>2</sup> = 0.86, RMSE = 0.79 psu) over a long time scale was gained by the improved SSS retrieval algorithm, which was validated by the measured data (R<sup>2</sup> = 0.92, RMSE = 0.72 psu). On top of that, the temporal and spatial distribution of SSS, as well as its diurnal, daily, and monthly changes, were then obtained in the Chinese Bohai Sea from April 2011 to March 2012. The impact of runoff on SSS was also analysed based on instant and lag correlations.</p></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48400103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Community structure of demersal fish over the continental shelf off the southeastern coast of Hokkaido Island: The effect of eurythermy in dominant species 北海道岛东南海岸大陆架上底栖鱼类的群落结构:优势物种中的广口鱼的影响
IF 2 4区 地球科学
Journal of Sea Research Pub Date : 2023-10-01 DOI: 10.1016/j.seares.2023.102418
Orio Yamamura , Kouji Kooka
{"title":"Community structure of demersal fish over the continental shelf off the southeastern coast of Hokkaido Island: The effect of eurythermy in dominant species","authors":"Orio Yamamura ,&nbsp;Kouji Kooka","doi":"10.1016/j.seares.2023.102418","DOIUrl":"10.1016/j.seares.2023.102418","url":null,"abstract":"<div><p>The seasonal dynamics of a boreal demersal fish community and the factor governing its structure have been analyzed, using a total of 169 Danish seine samples collected off the southeastern coast of Hokkaido Island where is an important nursery for Japan Pacific population of walleye pollock <em>Gadus chalcogrammus</em>. The sea floor of the area was covered by cold (&lt;2 °C) Coastal Oyashio Water during spring which was replaced by Oyashio Water and Modified Soya Current Water by autumn. Antlered sculpin <em>Enophrys dicerus</em> was the dominant species accounting for 23.2% of total biomass followed by plain sculpin <em>Myoxocephalus jaok</em> (19.8%), Kamchatka flounder <em>Atheresthes evermanni</em> (8.2%) and walleye pollock (7.4%). Based on species composition and biomass, the samples were classified into the four faunal groups: i) upper-shelf assemblage in which antlered and plain sculpins in combined accounted for 61.4%, ii) mid-shelf assemblage dominated by antlered sculpin (27.0%) and various fish taxa iii) lower shelf assemblage dominated by gadids (32.8%) and iv) less abundant lower-shelf assemblage dominated by antlered sculpin (33.3%) and other cottoid species (30.4%). Depth was the most important factor determining the structure of assemblages accounting for 66.2% of the variance explained by environmental variables, outweighing the effects of season (19.4%) and temperature (14.4%). This result was ascribed to the eurythermy of the dominant species which persisted at relatively narrow depth ranges under the seasonally fluctuating thermal environments.</p></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45318827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Testing the applicability of marine biotic indices for ecological quality in the northern East China Sea 检验东海北部海洋生物指标对生态质量的适用性
IF 2 4区 地球科学
Journal of Sea Research Pub Date : 2023-10-01 DOI: 10.1016/j.seares.2023.102441
Chen Song , Runxuan Yan , Maowang Jiang , Ruibing Peng , Qingxi Han
{"title":"Testing the applicability of marine biotic indices for ecological quality in the northern East China Sea","authors":"Chen Song ,&nbsp;Runxuan Yan ,&nbsp;Maowang Jiang ,&nbsp;Ruibing Peng ,&nbsp;Qingxi Han","doi":"10.1016/j.seares.2023.102441","DOIUrl":"10.1016/j.seares.2023.102441","url":null,"abstract":"<div><p>The northern East China Sea is currently subjected to anthropogenic disturbances during the past few decades. Using data collected in July 2019 and July 2020, the AZTI's Marine Biotic Index (AMBI), multivariate-AMBI (M-AMBI), Shannon–Wiener diversity index (H′), and BENTIX index were adopted to assess their applicability and evaluate the benthic ecological quality of the northern East China Sea. The results of the Pearson correlation between biotic indices and eutrophication environmental factors showed that H′ and M-AMBI were suitable biotic indices for evaluating the benthic ecological quality in the northern East China Sea rather than AMBI and BENTIX. The overall benthic ecological quality in the northern East China Sea was moderate to good during 2019–2020. Ecological quality showed a positive correlation with distance to mainland. However, a slow declining trend was detected for the benthic ecological quality of the northern East China Sea, especially the nearshore areas.</p></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43801081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Study on the mechanisms of interannual variation in suspended sediment concentration in the Bohai Sea based on GOCI 基于GOCI的渤海悬沙浓度年际变化机制研究
IF 2 4区 地球科学
Journal of Sea Research Pub Date : 2023-10-01 DOI: 10.1016/j.seares.2023.102416
Jianbin Xie , Xingru Feng , Haijun Chen , Baoshu Yin
{"title":"Study on the mechanisms of interannual variation in suspended sediment concentration in the Bohai Sea based on GOCI","authors":"Jianbin Xie ,&nbsp;Xingru Feng ,&nbsp;Haijun Chen ,&nbsp;Baoshu Yin","doi":"10.1016/j.seares.2023.102416","DOIUrl":"10.1016/j.seares.2023.102416","url":null,"abstract":"<div><p>The launch of the Geostationary Ocean Color Imager (GOCI) satellite has made it possible to observe suspended sediment concentration (SSC) in the Bohai Sea (BHS) over a long time and a large area. We utilized remote sensing data from GOCI from 2011 to 2021 to study the spatiotemporal variation characteristics of SSC in the BHS and identified the contribution of each oceanic element to the changes in SSC. Our findings indicate that SSC is high in winter and low in summer, and related to the southeastward winds in winter (&gt;7 m/s) and northwestward winds in summer (&lt;4 m/s), with a correlation coefficient of 0.634. The average annual increase in SSC is 0.07 g/m<sup>3</sup> (an increase of 1.2% per year). In terms of spatial distribution, SSC is highest in Bohai Bay and Laizhou Bay, followed by the Liaodong Bay, and is greater than that in the Central Bohai Sea, which is related to multiple river estuaries in the three bays. Additionally, the Bohai and Liaodong Bay in the BHS are covered by sea ice during winter, which affects the response of waves and currents to wind and changes the ocean current field, thereby affecting the resuspension and transport of sediment. Our EOF analysis revealed that wind-induced changes are the dominant factors in the variations of SSC, while changes in river runoff, sediment discharge, and sea ice cover are also important factors influencing SSC changes.</p></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47956184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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