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Examining the evolution of tidal creeks in the Huanghe River delta using multi-temporal Landsat images

Journal of Oceanology and Limnology 2024年第4期42卷 1061-1073页

作者： Zhen HAN Kai JIN Quanli ZONG Peng QIN Chunxia LIU Xiuzhi ZHU Xinyue LI College of Resources and Environment Qingdao Agricultural UniversityQingdao 266109China

Coastal tidal creeks are important channels for exchanges of material and energy between sea and land,and play an important role in the ecological protection of tidal *** tidal creeks have evolved differently in various regions,the evolutionary process of tidal creeks in the Huanghe(Yellow)River delta of China,one of the most active deltas worldwide,is not entirely ***,the evolution of tidal creeks in the delta from 1981 to 2021 was investigated by quantitatively analysing the tidal creeks and developing a standard for dividing their evolution *** interpretation and supervised classification methods were applied to the Landsat images to extract the tidal creek network,and 17 groups of tidal creek systems were *** indicate that creek S 1 was the most developed creek for having 113 tidal creeks totaling 65.8 km in length,while creek E 3 had the fastest growth rate for having average annual increase of 1.9 ***,the level of tidal creeks increased,the average and median lengths of tidal creeks increased,and the number of tidal creeks decreased since *** evolution of the tidal creek system could be divided into four stages,namely,rising,developing,stabilizing,and *** of a representative tidal creek show that there was no degenerated tidal creek during the rising period,with an increase in the number of 50 and a length increase of 57.9 km between 1981 and *** proportion of new tidal creeks in the developing period was more than 50%and the new tidal creeks in the stabilizing period were equal to the degraded tidal *** tidal creeks were greater than 50%during the degrading *** was no fixed order of tidal creek evolution in each period,and there may be a skip in *** findings provided a reference for studying the evolution of tidal creeks.

关键词： tidal creek evolution pattern remote sensing Huanghe(Yellow)River delta

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Level study on fractal characteristics of tidal creeks and information of seashell habitats in the Gaizhou Beach based on high-resolution satellite images

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Acta Oceanologica Sinica 2004年第4期23卷 663-672页

作者： CHENXiufa YANGXiaomei LIYunju LIUBaoyin WANGJinggui ZHANGZichuan LREIS InstituteofGeographicalSciencesandNaturalResourcesResearchChineseAcademyofSciencesBeijing100101China／／ChinaGraduateSchooloftheChineseAcademyofSciencesBeijing100039China LREIS InstituteofGeographicalSciencesandNaturalResourcesResearchChineseAcademyofSciencesBeijing100101China FirstInstituteofOceanography StateOceanicAdministrationQingdao266061China

The fractal characteristics of tidal creeks in the Gaizhou Beach are analyzed based on high-resolution images fusionof Landsat TM and ERS2, and then the graphic models and characteristics of converse information tree of tidalcreeks in the Gaizhou Beach are established. A calculation model is established based on the above results, and at thesame time, quantitative calculation of the evolution characteristics and the diversity between the northern and thesouthern parts of the Gaizhou Beach is carried out. By the supervised classification of these images, distribution andareas of high tidal flats, middle tidal flats and low tidal flats in the Gaizhou Beach are studied quantitatively, and imagecharactistics of seashell habitats in the Gaizhou Beach and the correlation between mudflat distribution and seashellhabitats are studied. At last, the engineering problems in the Gaizhou Beach are discussed.

关键词： high-resolution satellite images tidal creek model seashell fractal

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Method for UAV-based 3D topography reconstruction of tidal creeks

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Journal of Geographical Sciences 2021年第12期31卷 1852-1872页

作者： ZHANG Xuhui LI Huan GONG Zheng ZHOU Zeng DAI Weiqi WANG Lizhu Samuel DARAMOLA Jiangsu Key Laboratory of Coast Ocean Resources Development and Environment Security Hohai UniversityNanjing 210098China College of Harbor Coastal and Offshore EngineeringHohai UniversityNanjing 210098China Yellow River Institute of Hydraulic Research YRCCZhengzhou 450003China College of Marine Science and Engineering Nanjing Normal UniversityNanjing 210046China

It is common to obtain the topography of tidal flats by the Unmanned Aerial Vehicle(UAV)photogrammetry,but this method is not applicable in tidal *** residual water will lead to inaccurate depth inversion results,and the topography of tidal creeks mainly depends on manual *** present study took the tidal creek of Chuandong port in Jiangsu Province,China,as the research area and used UAV oblique photogrammetry to reconstruct the topography of the exposed part above the water after the ebb *** also proposed a Trend Prediction Fitting(TPF)method for the topography of the unexposed part below the water to obtain a complete 3D *** topography above the water measured by UAV has the vertical precision of 12 *** the TPF method is used,the cross-section should be perpendicular the central axis of the tidal creek.A polynomial function can be adapted to most shape of sections,while a Fourier function obtains better results in asymmetrical *** with the two-order function,the three-order function lends itself to more complex ***,the TPF method is more suitable for small,straight tidal creeks with clear texture and no vegetation cover.

关键词： tidal creek unmanned aerial vehicle digital elevation model trend prediction fitting method

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Spatiotemporal Distribution of Asian Horseshoe Crab Eggs Are Highly Intermingled with Anthropogenic Structures in Northern Beibu Gulf,China

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Journal of Ocean University of China 2022年第3期21卷 531-540页

作者： KWAN Kit Yue FU Yijian ZHONG Mufeng KUANG Yang BAI Haiwei ZHANG Ce ZHEN Wenquan XU Peng WANG Chun-Chieh ZHU Junhua College of Marine Sciences Beibu Gulf Ocean Development Research CenterBeibu Gulf UniversityQinzhou535011China Guangxi Key Laboratory of Beibu Gulf Marine Biodiversity Conservation Qinzhou535011China Guangxi Key Laboratory of Marine Disaster in the Beibu Gulf Qinzhou535011China Guangxi Beibu Gulf Marine Research Center Guangxi Academy of SciencesNanning530007China

Identification,protection and restoration of spawning habitats are vital for protecting the depleted *** horseshoe crabs are ecologically important macroinvertebrates in coastal and estuarine ***,their spawning habitat studies were limited to several reports in tropical regions,possibly due to the lack of modified survey methods,particularly in habitats with a lower density of spawning adults,and/or intermingled with anthropogenic *** this study,the year-round egg distribution and spawning habitat baselines of Carcinoscorpius rotundicauda and Tachypleus tridentatus were determined in the northern Beibu Gulf,*** findings demonstrated that the peak spawning occurred in June–July and ceased in November–January when the average water temperature dropped below 20℃.Egg aggregations were foundtidal inundation,regardless of seasonal changes,in the vicinity of natural and artificial structures with elevated,mildly sloping substratum within the high tide *** nests were characterized by medium-sized sediment grains(0.5–0.9 mm),high temperatures(31–34℃),low water contents(0.8%–0.9%),and total organic carbon contents(0.5%–0.7%),which might maximize the hatching *** identified nesting beaches were close to nursery habitats for juveniles,and tidal creeks were present as the possible corridor connecting these two important habitats through the dominant mangrove *** findings provide valuable insights in the scope of spawning behavior and nest-site selection of Asian horseshoe crabs under a mixture of natural and artificial structures,which could benefit future management efforts for the exploited spawning populations.

关键词： Carcinoscorpius rotundicauda Tachypleus tridentatus mangrove tidal creek sediment texture slope elevated substratum

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Asian Horseshoe Crab Bycatch in Intertidal Zones of the Northern Beibu Gulf:Suggestions for Conservation Management

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Journal of Ocean University of China 2022年第3期21卷 611-621页

作者： WANG Chun-Chieh CHEN Ruifang YANG Xin WEN Yulong KUANG Yang ZHANG Ce ZHU Junhua KWAN Kit Yue Guangxi Key Laboratory of Marine Environmental Science Guangxi Beibu Gulf Marine Research CenterGuangxi Academy of SciencesNanning530007China Guangxi Key Laboratory of Beibu Gulf Marine Biodiversity Conservation College of Marine SciencesBeibu Gulf UniversityQinzhou535011China

Bycatch poses a severe challenge to global fishery *** studies have focused on marine megafauna bycatch,research on relevant issues regarding invertebrates is limited,particularly for the threatened horseshoe *** this study,the distribution of fishing gears and the bycatch intensity of Asian horseshoe crabs in the intertidal zones of the northern Beibu Gulf that harbors the most abundant juvenile Asian horseshoe crabs populations in China were *** intertidal nursery habitats for Tachypleus tridentatus and Carcinoscorpius rotundicauda were surveyed from May to July in 2021.A transect that crossed the tidal creeks and tidal flats between the high tide embankment/vegetation and low tide line of a given habitat was surveyed during the ebb *** type,number,and GPS of fishing gears were recorded when sighted,and the number and prosomal width of each horseshoe crab species were *** intensities differed among habitats,ranging from 0.3 to 18.4 and 1.2 to 22.7 individuals per kilometer of transect for *** and ***,*** the three identified fishing gear types,ground cages and stick net sets caused a stronger bycatch pressure on these two *** *** bycatch and *** bycatch were large individuals in late juvenile and adult ***,the ground cages and stick net sets along/near the tidal creeks,mangrove fringe,and low tide line should be regulated and removed to ensure the functionality of the intertidal zone as the spawning corridor and nursery habitat of Asian horseshoe crabs.

关键词： Tachypleus tridentatus Carcinoscorpius rotundicauda ground cage stick net tidal creek mangrove low tide line spawning corridor

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A systematic review of morphological models of salt marshes

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Water Science and Engineering 2023年第4期16卷 313-323页

作者： Xin-chen Wang Pei Xin Zeng Zhou Fu-xin Zhang College of Water Conservancy and Hydropower Engineering Hohai UniversityNanjing 210098China State Key Laboratory of Hydrology–Water Resources and Hydraulic Engineering Hohai UniversityNanjing 210098China Yangtze Institute for Conservation and Development Hohai UniversityNanjing 210098China Jiangsu Key Laboratory of Coast Ocean Resources Development and Environment Security Hohai UniversityNanjing 210098China

Salt marshes are among the most important coastal wetlands and provide critical ecological services,including climate regulation,biodiversity maintenance,and blue carbon ***,most salt marshes worldwide are shrinking,owing to the effects of natural and human factors,such as climate change and artificial ***,it is essential to understand the decline in the morphological processes of salt marshes,and accordingly,the likely evolution of these marshes,in order to enable measures to be taken to mitigate this *** this end,this study presented an extensive systematic review of the current state of morphological models and their application to salt *** emergence of process-based(PB)and data-driven(DD)models has contributed to the development of morphological *** morphodynamic simulations in PB models,multiple physical and biological factors(e.g.,the hydrodynamics of water bodies,sediment erosion,sediment deposition,and vegetation type)have been *** systematic review revealed that PB models have been extended to a broader interdisciplinary ***,most DD models are based on remote sensing database for the prediction of morphological characteristics with latent *** to DD models,PB models are more transparent but can be complex and require a lot of computational ***,to make up for the shortcomings of each model,future studies could couple PB with DD models that consider vegetation,microorganisms,and benthic animals together to simulate or predict the biogeomorphology of salt marsh ***,this review found that there is a lack of unified metrics to evaluate model performance,so it is important to define clear objectives,use multiple metrics,compare multiple models,incorporate uncertainty,and involve experts in the field to provide guidance in the further study.

关键词： Morphology Salt marsh Predictive modeling tidal creek tidal flat

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Composition of fish communities in an intertidal salt marsh creek in the Changjiang River estuary,China

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Chinese Journal of Oceanology and Limnology 2009年第4期27卷 806-815页

作者：全为民倪勇施利燕陈亚瞿 Key and Open Laboratory of Marine and Estuarine Fishery Ministry of AgricultureEast China Sea Fishery Research InstituteChinese Academy of Fishery Sciences

Fish communities in a （third-order） intertidal creek in Dongtan marsh in the Changjiang （Yangtze） River estuary were investigated seasonally for one year. A total of 1 996 fish specimens （10 967.8 g） comprising 26 species and 15 families were collected. Abundances of fish communities in the intertidal salt marsh creek were primarily dominated by Boleophthalmus pectinirostris （19.8%）, Collichthys lucidus （18.6%）, Periophthalmus magnuspinnatus （18.2%）, Liza haematocheilus （17.9%）, and secondarily by Mugilogobius abel （8.5%）, L. carinatus （7.2%）, Odontamblyopus lacepedii （4.3%）, and Acanthogobius ommaturus （3.9%）; another 18 species were present only occasionally. Non-MDS ordination and SIMPER analysis indicated that there were two fish communities in the intertidal salt marsh creek. In spring, the communities were dominated by B. pectinirostris, P. magnuspinnatus, C. lucidus and M. abei; in summer, autumn, and winter by L. haematocheilus, L. carinatus, A. ommaturus and O. lacepedii. Some species showed strong habitat selection; L. carinatus and P magnuspinnatus were distributed mainly in the upper and middle creek, while B. pectinirostris, M. abei and O. lacepedii inhabited the middle and lower creek. The study indicated that the salt marshes of the Changjiang River estuary are an important nursery and feeding habitat for many fishes and should be protected.

关键词： fish communities habitat nursery tidal creek salt marsh Changjiang (Yangtze) River estuary

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Recent Foraminifers from Oman Coast

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Journal of Environmental Science and Engineering(A) 2015年第3期4卷 137-142页

作者： Abdul Razak Siddiq A1-Sayigh Moza Muhanna A1 Jahdhami Ahmed Mohamed Muftah Department of Earth Sciences College of Science Sultan Qaboos University Muscat 132 Sultanate of Oman Department of Earth Sciences Faculty of Science University of Benghazi Benghazi 9480 Libya

This study presents the first documentation work on recent benthic foraminifers of Oman coasts, especially of the northern part of Sultanate at Sawadi and the southern part at Janoof tidal creek near Taqah-Salalah beach. Eleven samples were collected from both localities. Twenty-nine species of benthonic Foraminifera belonging to 20 genera are retrieved, identified and illustrated herein. The study areas show the interaction in land and sea. Lagoons with normal marine hypersaline inhabited with sea grass and Mangrove-swamps. Mainly calcareous porcellaneous and hyaline walled foraminifers are abundant. Environmentally, the Janoof tidal creek shows better condition than Sawadi tidal creek as reflected by the more diverse and high abundance of foraminiferal taxa at the former locality. Both water bodies are free of toxic-heavy elements as evidenced by the lack of any abnormal foraminiferal test.

关键词： Mangrove foraminifera tidal creek sawadi muscat.

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