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Comparison of the Macrozoobenthic Community and Sedimentary Environment with and Without Horseshoe Crab Presence in the Crocodile Island intertidal zone,Xiamen,China

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Journal of Ocean University of China 2022年第3期21卷 573-582页

作者： CAI Lizhe ZHAO Xiaoyu PENG Wenqing LIN Jingxiang YANG Deyuan RAO Yiyong FU Sujing CHEN Xinwei CAO Wenzhi College of the Environment and Ecology Xiamen UniversityXiamen361102China Department of Environmental Science and Engineering Xiamen University Tan Kah Kee CollegeZhangzhou363105China Institute of Marine Biology Taiwan Ocean UniversityKeelung20224China South China Sea Fisheries Research Institute Chinese Academy of Fishery SciencesGuangzhou510300China Laboratory of Marine Biology and Ecology Third Institute of OceanographyMinistry of Natural ResourcesXiamen361005China

In order to compare the macrozoobenthic community and sedimentary environment with and without the presence of horseshoe crabs,the benthic macrofauna,sediment grain size,chromium(Cr),cobalt(Co),nickel(Ni),polycyclic aromatic hydrocarbon(PAHs),organic carbon and nitrogen were seasonally investigated at site A(with horseshoe crab presence),sites B and C(without horseshoe crab presence)in the Crocodile Island intertidal zone in Xiamen from June 2018 to July *** results showed that most of the community parameters of benthic macrofauna,population parameters of common benthic macrofauna and environmental parameters were significantly different at the sites with horseshoe crab versus non-horseshoe crab sites.A two-way ANOVA test showed that the densities of Ceratonereis erythraeensis and Sigambra hanaokai had significant site *** and nonmetric multi-dimensional scaling(NMDS)analysis showed the community composition of benthic macrofauna was significantly different among the three sampling sites over four *** mean sand content at site A(64.32%)was higher than those at site B(36.01%)and site C(18.86%).Conversely,the mean contents of silt,clay,Cr,Co,Ni,organic carbon,organic nitrogen,phenanthrene,and pyrene at site A were lower than those at site B and site *** observations are consistent with the expected preferences of horseshoe crabs to live in areas with 60%sand content,which is associated with abundant and edible clamworms in the Crocodile Island intertidal zone,Xiamen.

关键词： benthic macrofauna Crocodile Island horseshoe crab sedimentary environment intertidal zone

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Modern sedimentation rates in the intertidal zone on the west coast of the Bohai Gulf

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Acta Oceanologica Sinica 2005年第3期24卷 46-53页

作者： MENGWei LEIKun ZHENGBinghui WANGFu WANGHong LIJianfen LIYong CollegeofMarineEnvironment OceanUniversityofChinaQingdao266003China／／ChineseResearchAcademyofEnvironmentalSciencesBeijing100012China ChineseResearchAcademyofEnvironmentalSciences Beijing100012China TianjinInstituteofGeologyandMineralResources ChineseGeologicalSurveyBureauTianjin300170China InstituteofAgro-environmentandSustainableDevelopment ChineseAcademyofAgriculturalSciencesBeijing100081China

On the basis of the measurement of 210Pbex and 137Cs activities in the sediment cores taken from the intertidal zone on the west coast of the Bohai Gulf, the average sedimentation rates of modern sediments are calculated. The results indicate that in the sandy area of the intertidal zone (from Daogouzi to the Duliujian River), the sedimentation rate from 1955 to 1963 is 3.43-4.06 cm/a, and is within the range of 0.65￣1.59 cm/a since 1963. The average sedimentation rate in the muddy area (around Qikou) is approximately 1.81 cm/a. The results above suggest that the sandy area of the intertidal zone has experienced rapid sedimentation from the 1950s to the 1960s, and the sedimentation slows down after the 1960s, and the sedimentation rates increase from north to south spatially. The rapid sedi- mentation from the 1950s to the 1960s in the sandy area is due to the fact that North China has plentiful precipitation during this period and the intertidal zone is supplied with abundant matter sources for sedimentation. After the 1960s, the weakened sedimentation may be a result of the reduction of sand transported to the intertidal zone, which is a consequence of diminished rainfall in North China and intensive human activities in the Haihe basin.

关键词： Bohai Gulf intertidal zone sedimentation rate 210Pbex 137Cs

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Species Composition and Diversity of Macrobenthos in the intertidal zone of Xiangshan Bay,China

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Journal of Ocean University of China 2015年第2期14卷 375-384页

作者： JIAO Haifeng ZHENG Dan YOU Zhongjie XU Nianjun LOU Dan HUANG Chengwei School of Marine Science Ningbo University Ningbo Academy of Oceanology and Fishery

Xiangshan bay is a narrow semi-closed bay and situated on the northwestern coast of the East China Sea. Over past decades, it has become to a major bay with intensive human activities, dense urbanized area, and poor water quality. The aim of this paper was to reveal the ecological status through the elucidation of the species composition, abundance, biomass and diversity of macrobenthos in this bay. Six intertidal sections were surveyed from January 2007 to November 2008 quarterly. Sections TG, HD and XH are located in the three inner bays, sections QJ and WS are located near the thermal power plants, and section XX is located at the outer part of Xiangshan Bay. Great variations in macrobenthos community were indentified, and the species composition of the community in the present study showed the dominance in the order of molluscs （bivalves and gastropods）, crustaceans and others, and only few Polychaeta were recorded. Only three dominant species, Littorina brevicula, llyplax tansuiensis, and Cerithidea cingu- lata were collected in all the sections, and a total of 19 dominant species were recorded only in one section. Two-way ANOVA analyses of abundance indicated that there were significant differences among sections or seasons. Shannon-Wiener diversity index （H＇） had its maximum （2.45） in section QJ, and minimum （1.76） in section TG Multiple irregular k-dominance plots clearly showed that the study area was polluted and the macrobenthos community was under stress. We conclude that the macrobenthos of Xiang- shan Bay have been disturbed by human activities, especially at the interior bay.

关键词： macrobenthos abundance biomass community structure species diversity intertidal zone

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Investigation of Macrobenthos in the intertidal zone of Tianjin and Discussion on Bioremediation

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Marine Science Bulletin 2004年第2期6卷 66-73页

作者：胡桂坤张青田 Marine Science & Engineering College Tianjin University of Sci. & Tech.

An investigation of macrobenthos in the littoral zone was carried out in Tanggu District, Tianjin City in June 2003. This investigation was the only integrated one since 1983 there. Something about macrobenthos investigation was reported in this paper. The results showed that the biomass of macrobenthos of that area was almost at the same level as that of 1983, and the density of macrobenthos increased a little. The biomass of Mactra veneriformis has great effect on the average biomass of that area. The diversity of macrobenthos has changed obviously, and 5 or 6 kinds of macrobenthos have become extinct or decreased greatly. So the ecological structure of macrobenthos has become simpler and unstable. In addition, some ecological methods to remedy the area are discussed in this paper.

关键词： macrobenthos bioremediation intertidal zone Tianjin

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The　pigmental　composition　and　the　absorption　spectral　analysis　of　Ulothrix　***　benthic　diatoms　in　the　intertidal　zone　of　Great　Wall　Station，Antarctica

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Chinese Journal of Polar Science 1995年第1期6卷 73-78页

作者：毛兴华李宝华黄凤鹏

This paper reports the results of the absorption spectral analysis of Ulothrix sp. attached to the rocks from the intertidal zone in front of Great Wall Station,Antarctica in February 1989,and the benthic diatoms growing on small stones and on the edge of swamps of that *** kinds of pigments were separated and identified in benthic *** are carotene, chlorophyll-a, fucoxanthin, chlorophyin, neoxanthin and chlorophyll-c. Nine kinds of pigments were identified in Ulothrix sp.. They are carotinoid, pheophytin, chlorophyll-a, -b, chlorophyllin, chlorophyllide-a, neoxanthin, chlorophyll-c and pheophytin-c. The intertidal benthic diatoms and Ulothrix sp. have specific absorption spectra and there are also marked differences in the composition of algal pigments they contain. Since the pigments of marine algae show differences in their absorption spectra, the absorption spectrum can be used to identify the species of marine algae.

关键词： Antarctica,Great Wall Station intertidal zone pigment absorption spectrum

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Semantic Segmentation of the intertidal zone of an Estuary—In Search of the Best Solution

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Journal of Geoscience and Environment Protection 2024年第7期12卷 1-13页

作者： Maria da Conceição Proença Ricardo Nogueira Mendes Ricardo Melo Marine and Environmental Sciences Centre (MARE-ULisboa) & ArNet Lisbon Portugal Department of Physics Faculty of Sciences University of Lisbon Lisbon Portugal Department of Animal Biology Faculty of Sciences University of Lisbon Lisbon Portugal Department of Plant Biology Faculty of Sciences University of Lisbon Lisbon Portugal

An aerial photographic coverage acquired on two consecutive days in October 2021 with a ground resolution of 20 cm and a spectral resolution of 4 bands (red, green, blue and near infrared), allowed to distinguish most of the classes of interest present in the intertidal zone of the Sado estuary. We explored the possibilities of thematic classification in the powerful and complex software ArcGIS Pro;we presented the methodology used in a detailed way that allows others with minimal knowledge of GIS to reproduce the classification process without having to decipher the specifics of the software. The classification implemented used ground truth from four classes related to the macro-occupations of the area. In a first phase we explore the standard algorithms with object-based capabilities, like K-Nearest Neighbor, Random Trees Forest and Support Vector Machine, and in a second phase we proceed to test three deep learning classifiers that provide semantic segmentation: a U-Net configuration, a Pyramid Scene Parsing Network and DeepLabV3. The resulting classifications were quantitatively evaluated with a set of 500 control points in a test area of 37,500 × 12,500 pixels, using confusion matrices and resorting to Cohen’s kappa statistic and the concept of global accuracy, achieving a Kappa in the range [0.72, 0.81] and a global accuracy between 88.9% and 92.9%;the option U-Net had the most interesting results. This work establishes a methodology to provide a baseline for assessing future changes in the distribution of Sado estuarine habitats, which can be replicated in other wetland ecosystems for conservation and management purposes.

关键词： Estuary intertidal zone ArcGIS Pro Segmentation Global Changes

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Mollusks of the Rocky intertidal zone at Three Sites in Oaxaca,Mexico

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Open Journal of Marine Science 2014年第4期4卷 326-337页

作者： Pedro Flores-Rodríguez Rafael Flores-Garza Sergio García-Ibánez Carmina Torreblanca-Ramírez Lizeth Galeana-Rebolledo Enedina Santiago-Cortes Laboratorio de Ecologia Costera y Sustentabilidad Unidad Academica de Ecologia MarinaUniversidad Autonoma de GuerreroAcapulcoMexico Doctorado en Ciencias Ambientales Unidad de Ciencias de Desarrollo RegionalUniversidad Autonoma de GuerreroAcapulcoMexico

The community of mollusks at three rocky intertidal zone in Oaxaca, Mexico was analyzed. Two samplings per site were conducted. At each sampling the inspected area was 10 m2. The sampling unit was 1 m2. 5862 specimens were examined. 68 mollusks species were identified. The families better represented in species richness were: FISSURELLIDAE, MURICIDAE, LOTIIDAE, MYTILIDAE, CHAMIDAE, ISCHNOCHITONIDAE y CHITONIDAE. The species that had the greatest density were Lottia discors, Siphonaria palmata, Lottia acutapex, Chormoytilus palliopunctatus, Brachidontes adamsianus, Chton articulatus e Ischnochiton muscarius. The species with the widest distribution represent 11.76%. With irregular distribution was found in 58.82% of the species. The gastropod Crucibulummonticulus, the bivalve C. palliopunctatus and the polyplacophoran C. articulatus had the greatest size. The value of diversity index was H’ = 4.29 bits/ind. and J’ = 0.72. The mollusks community in the rocky intertidal zone study sites is characterized by small size, because they rarely exceed seventy millimeters. The values of H’ and J’ indicate that the mollusk community in the study area has a high diversity and high uniformity, corresponding to mature and stable communities in a tropical region.

关键词： intertidal zone Oaxaca Biodiversity Mollusks

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Investigation on Shellfish Species Living in the intertidal zone to Subtidal zone of Fenjiezhou Island of Hainan

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Agricultural Science & Technology 2016年第5期17卷 1204-1210页

作者：白丽蓉赵志英刘庆明崔婧海南省海洋与渔业科学院海南海口570206

Based on the investigation on shellfish resources from the intertidal zone to subtidal zone of Fenjiezhou Island,Hainan during 2012-2014,the quantity,species,ecological distribution and floristic characters of shellfish from the intertidal zone to subtidal zone of Fenjiezhou Island were *** results showed that a total of 137 shellfish species were found in Fenjiezhou Island,and they belonged to 4 classes [Polyplacophora（1 species）,Gastropoda（94 species）,Bivalvia（40species）,Cephalopoda（2 species）],13 orders and 44 *** the families,Cypraeidae included 11 species,Muricacea included 9 species,Veneracea included9 species,Conidae included 8 species,Strombidae included 6 species,Cymatiidae included 6 species,and the other families all included less than 5 *** to the characteristics of the components,most of the species belonged to the tropical or subtropical region,and they had a close relationship with coral *** to the floristic characters,the shellfish in Fenjiezhou Island belonged to the Indonesia-Malayan Subregion of Indo-West Pacific Region.

关键词： Shellfish Distribution Floristic characters intertidal zone Subtidal zone Fenjiezhou Island

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Determination of the Fish Community Structure of an intertidal Rocky zone of the Pacific Coast of Baja California Sur

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Open Journal of Marine Science 2022年第1期12卷 1-18页

作者： Laura E. Cota-Ortega Emelio Barjau-Gonzalez Juan Manuel López-Vivas José Ángel Armenta-Quintana Javier Aguilar-Parra Elvia Esthela Aispuro-Felix Abril Karim Romo Piñera Departamento Académico de Ciencias Marinas y Costeras Universidad Autónoma de Baja California Sur La Paz B.C.S. Departamento Académico de Ciencia Animal y Conservación del Hábitat Universidad Autónoma de Baja California Sur La Paz B.C.S. Departamento Académico de Sistemas Computacionales Universidad Autónoma de Baja California Sur La Paz B.C.S.

The intertidal zone (also known as seashore) are transition areas between land and sea, that are greatly influenced by the tide cycle, therefore, environmental parameters, such as temperature and salinity, oscillate according to the periods in which these areas are exposed to air. intertidal zones are highly diverse, which makes them key ecosystems for the development of sea life (both flora and fauna) exposed to drastic environmental change. The 59 visual censuses campaigns were carried out during the full moon of each month from 2015 to 2019. Temperature, salinity and dissolved oxygen were recorded during each visual census and showed variations between years. Temperature showed two distinct seasons, warm and cold. A total of 14,995 organisms were recorded, belonging to 30 species, 28 genera, 15 families, five orders and one class. Ecological indices like species richness (SR), Shannon-Wiener’s diversity (H') and Fisher’s alpha (α-Fisher) showed significant differences between years, 2015 and 2016 recorded as the most diverse years, while the lowest values were recorded in 2019. Therefore, fish communities of tide pools showed to be highly diverse, with 30 species recording similar relative abundances, and according to the BVI, only 11 species were dominant. Spatio-temporal variations of temperature, salinity and dissolved oxygen were highly correlated to changes in fish community structure, and the dominance of certain species, which are of great

关键词： Rockpools Ecological Indices Fish Community Structure intertidal zone

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Laboratory simulation of soil respiration response to environmental conditions in intertidal zones of Jiangsu Province,China

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Water Science and Engineering 2022年第2期15卷 134-140页

作者： Peng Wang Xia Shen Zu-lin Hua Xiao-dong Liu Yi-xin Ma Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education Hohai UniversityNanjing 210098China Yangtze Institute for Conservation and Development Hohai UniversityNanjing 210098China Key Laboratory of Ocean Space Resource Management Technology of Ministry of Natural Resources Hangzhou 310012China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing Hydraulic Research InstituteNanjing 210029China

As major contributor to the blue carbon sink,intertidal zones play a crucial role in the global carbon *** recent years,more attention has been given to the carbon cycle in intertidal ***,due to highly variable and uncertain environmental conditions,it is difficult to clarify the quantitative relationship between soil respiration and environmental factors through in-situ *** this study,the response of soil respiration characteristics to variations in the temperature and water table was investigated using a monitoring apparatus of CO_(2)flux at the soil-air interface in the intertidal *** results showed that soil respiration flux was significantly correlated with temperature,and the correlation best fitted the DoseResp ***,the respiration flux was enhanced with the descent of water table,a relationship could be described by a quadratic *** effect of the water table on soil respiration became more pronounced with the rise of *** results provide significant clarification of the impact of human activities on the carbon cycle in bare intertidal zones and as well as support for numerical simulations of the carbon cycle in bare intertidal zones.

关键词： intertidal zone Carbon flux Soil respiration Human activities Water table

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