Lagoon Environments Around the World - A Scientific Perspective最新文献

Morphodynamics in a Tropical Shallow Lagoon: Observation and Inferences of Change 热带浅泻湖的形态动力学:变化的观察和推论

Lagoon Environments Around the World - A Scientific Perspective Pub Date : 2020-02-28 DOI: 10.5772/intechopen.90189

Alfred S. Alademomi, A. Manning, V. J. Abbott, R. Whitehouse

{"title":"Morphodynamics in a Tropical Shallow Lagoon: Observation and Inferences of Change","authors":"Alfred S. Alademomi, A. Manning, V. J. Abbott, R. Whitehouse","doi":"10.5772/intechopen.90189","DOIUrl":"https://doi.org/10.5772/intechopen.90189","url":null,"abstract":"The Lagos Lagoon system and its adjacent tidal basins exhibit dynamics that are significantly different on both spatial and temporal scales. As urbanisation and human activities around the lagoon have intensified, the volume of sediment deposited into the basin is increasing on a daily basis. Changes on the lagoon bed over a 6-year time scale using repeated bathymetric data (2008, 2014) are presented, and the related data acquisition technique is explained. Data reduction is followed by analysis of the lagoon water bed dynamics using abstracted profile lines from the bathymetric data within a GIS environment. The results of the significant accretion and erosion within the lagoon system were analyzed spatially to quantify the volume of sediment gain or loss on the lagoon bed. The findings partly show that over 6 years, an average height of 0.16 m was gained by the lagoon. This amount translates into an annual accretion rate of 0.026 m. These findings enhance the prospect of verifying in the long term whether the Lagos Lagoon is gradually disappearing. To the best of the author ’ s knowledge, this research reveals for the first time the complex evolutionary changes (channel movement, accretion, erosion, infill and movement of shoal) on the Lagos Lagoon bed.","PeriodicalId":218910,"journal":{"name":"Lagoon Environments Around the World - A Scientific Perspective","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128784768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Process-Based Statistical Models Predict Dynamic Estuarine Salinity 基于过程的统计模型预测动态河口盐度

Lagoon Environments Around the World - A Scientific Perspective Pub Date : 2019-11-18 DOI: 10.5772/intechopen.89911

Christina Durham, D. Eggleston, A. J. Nail

{"title":"Process-Based Statistical Models Predict Dynamic Estuarine Salinity","authors":"Christina Durham, D. Eggleston, A. J. Nail","doi":"10.5772/intechopen.89911","DOIUrl":"https://doi.org/10.5772/intechopen.89911","url":null,"abstract":"Climate change is increasing variation in freshwater input and the intensity of this variation in estuarine systems throughout the world. Estuarine salinity responds to dynamic meteorological and hydrological processes with important consequences to physical features, such as vertical stratification, as well as living resources, such as the distribution, abundance and diversity of species. We developed and evaluated two space-time statistical models to predict bottom salinity in Pamlico Sound, NC: (i) process and (ii) time models. Both models used 20-years of observed salinity and contained a deterministic component designed to represent four key processes that affect salinity: (1) recent and long-term fresh water influx (FWI) from four rivers, (2) mixing with the ocean through inlets, (3) hurricane incidence, and (4) interactions among these variables. Freshwater discharge and distance from an inlet to the Atlantic Ocean explained the most variance in dynamic salinity. The final process model explained 89% of spatiotemporal variability in salinity in a withheld dataset, whereas the final time model explained 87% of the variability within the same withheld data set. This study provides a methodological template for modeling salinity and other normally-distributed abiotic variables in this lagoonal estuary.","PeriodicalId":218910,"journal":{"name":"Lagoon Environments Around the World - A Scientific Perspective","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114662371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lagoons Reefs of Alacranes Reef and Chinchorro Bank: Ocean Reef of Mexican Atlantic Alacranes礁和Chinchorro岸的泻湖礁:墨西哥大西洋的海洋礁

Lagoon Environments Around the World - A Scientific Perspective Pub Date : 2019-11-08 DOI: 10.5772/intechopen.88662

D. Torruco, M. A. González-Solis, Ángel Daniel Torruco González

{"title":"Lagoons Reefs of Alacranes Reef and Chinchorro Bank: Ocean Reef of Mexican Atlantic","authors":"D. Torruco, M. A. González-Solis, Ángel Daniel Torruco González","doi":"10.5772/intechopen.88662","DOIUrl":"https://doi.org/10.5772/intechopen.88662","url":null,"abstract":"Coral reef lagoons are one of the parts of the reef with the largest biotopes, making it an area with great inequalities. Under this perspective we try to compare the lagoons of the biggest ocean reefs in Mexico, which despite belonging to the Mexican Atlantic depend on two different systems: Alacranes Reef of the Gulf of Mexico and Banco Chinchorro of the Mexican Caribbean. From the results the proportion of living substrate is higher were obtained in Banco Chinchorro; how-ever, the richness of species and diversity is greater in Alacranes (58 versus 39 species and 4.44 versus 4.38 bits/ind., respectively). Lobophora variegata (algae) is the only species whose dominance was proportionately consistent in both reefs; the similarity of sites identifies specific zones of the lagoons in both reefs, in the space the species are distributed close to the center of the axes, but many remain solitary or assembled in pairs. Despite the differences between the reefs according to the community descriptors, the location of the sites and their position in relation to the wind are relevant to the understanding of the dynamics of the lagoons.","PeriodicalId":218910,"journal":{"name":"Lagoon Environments Around the World - A Scientific Perspective","volume":"30 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132272071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Environmental Monitoring of Water Quality as a Planning and Management Tool: A Case Study of the Rodrigo de Freitas Lagoon, Rio de Janeiro, Brazil 作为规划和管理工具的水质环境监测:巴西里约热内卢罗德里戈弗雷塔斯泻湖的案例研究

Lagoon Environments Around the World - A Scientific Perspective Pub Date : 2019-09-06 DOI: 10.5772/intechopen.88687

G. Gandhi, Obraczka Marcelo, de Souza Monica Medeiros, Mello Monique Alves Leite, É. Ferreira

{"title":"Environmental Monitoring of Water Quality as a Planning and Management Tool: A Case Study of the Rodrigo de Freitas Lagoon, Rio de Janeiro, Brazil","authors":"G. Gandhi, Obraczka Marcelo, de Souza Monica Medeiros, Mello Monique Alves Leite, É. Ferreira","doi":"10.5772/intechopen.88687","DOIUrl":"https://doi.org/10.5772/intechopen.88687","url":null,"abstract":"The Rodrigo de Freitas Lagoon is an urban water body, representing one of the most popular spots for the local community. It underwent serious environmental degradation, at first through its water mirror reduction and more recently through sewer inflows. Concurrently, the difficulty in renewing the water combined with adverse climatic conditions has repeatedly led to an alarming fish mortality rate. The monitoring of its water quality has been carried out as a management and planning tool that lead to the improvement of the environmental conditions. This study seeks to assess monitoring results by correlating the factors that might be the cause of a failure to comply with environmental regulations. Although it is evident that particular places in the Lagoon might be more often affected by illegal sewer discharges, no evidence could be found of any variations between the six sampling points. However, the rise in the levels of Escherichia coli, nitrogen and phosphorus, and the general temperature conditions, pH, and salinity of the water shows that the most significant alterations occurred in spring 2018.The complexity of the period of phytoplankton growth followed by the fish mortality from anoxia underlines the need for monitoring as a tool for a better understanding of the alterations, providing guidance with regard to the planning and management of the ecosystem.","PeriodicalId":218910,"journal":{"name":"Lagoon Environments Around the World - A Scientific Perspective","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115966492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Hypersaline Lagoons from Chile, the Southern Edge of the World 智利的高盐泻湖，世界的南部边缘

Lagoon Environments Around the World - A Scientific Perspective Pub Date : 2019-08-23 DOI: 10.5772/INTECHOPEN.88438

G. Gajardo, Stella Redón

{"title":"Hypersaline Lagoons from Chile, the Southern Edge of the World","authors":"G. Gajardo, Stella Redón","doi":"10.5772/INTECHOPEN.88438","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.88438","url":null,"abstract":"Hypersaline lagoons distributed in arid and semiarid regions are unique ecosystems with unique value stemming from their extremophile biodiversity, limnological properties and services, like mining and waterbird habitat. They are natural laboratories to understand how life evolved in extreme environments and how simple ecosystems function to provide waterbird habitat, an essential noneconomic service. Policymakers need this knowledge to protect these ecosystems increasingly affected by climatic change and human-driven perturbations. Hypersaline lagoons from contrasting latitudinal conditions in Chile provide a study case to evaluate how such conditions affect their microscopic and macroscopic diversities. Those in the hyperarid Atacama Desert in northern Chile are an integral part of mineral-rich salars, whereas Patagonian lagoons are unique among freshwater lakes of glacier origin. Despite latitudinal differences, prokaryotic diversity tends to be similar in both extremes. However, genetically distant brine shrimp ( Artemia ) species, A. franciscana (north) and A. persimilis (Patagonia), inhabit them. This crustacean is a keystone taxon in the food web, and its abundance indicates ecosystem quality and attracts waterbirds. This chapter stresses the need to systematically monitoring Artemia abundance and all factors affecting its fitness (gut microbiota, parasites, environmental conditions). Finally, the need to conserve these unique and extreme ecosystems is highlighted.","PeriodicalId":218910,"journal":{"name":"Lagoon Environments Around the World - A Scientific Perspective","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115598204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Subtropical Coastal Lagoon from Southern Brazil: Environmental Conditions and Phytobenthic Community Structure 巴西南部亚热带沿海泻湖:环境条件和底栖植物群落结构

Lagoon Environments Around the World - A Scientific Perspective Pub Date : 2019-07-25 DOI: 10.5772/INTECHOPEN.87776

Letícia Donadel, L. C. Torgan

{"title":"Subtropical Coastal Lagoon from Southern Brazil: Environmental Conditions and Phytobenthic Community Structure","authors":"Letícia Donadel, L. C. Torgan","doi":"10.5772/INTECHOPEN.87776","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.87776","url":null,"abstract":"The chapter is about the study of environmental conditions and the structure of the benthic diatoms community in Peixe Lagoon, which is inserted in a National Park in southern Brazil. The study was carried out covering four seasons from 2011 to 2012. The system is shallow (<60 cm) located parallel to the coastline, and it is connected to the ocean through a single channel, which occurs naturally or through human action. In this lagoon, during the study, the water temperature ranged between 15.3 and 32.1°C, and the dissolved oxygen presented higher value in the winter (12.5 mg.L − 1 ) and lower value in the summer (7.5 mg.L − 1 ). The lagoon ranged from mesotrophic to hypereutrophic conditions. The salinity varied between 1.3 and 36.2%, and these variations were mainly related to meteorological conditions. The community of diatoms in Peixe Lagoon is composed by 62 taxa distributed in 30 genera composed largely of marine, brackish, and few freshwater species. Among the attributes of the community, composition better reflects the environmental variations. The opening and closing of the channel, salinity, temperature, and the action and direction of the wind are variables influencing the dynamics of the microphytobenthic community.","PeriodicalId":218910,"journal":{"name":"Lagoon Environments Around the World - A Scientific Perspective","volume":"787 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115758810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

A GIS-Based Approach for Determining Potential Runoff Coefficient and Runoff Depth for the Indian River Lagoon, Florida, USA 基于gis的美国佛罗里达州印第安河泻湖潜在径流系数和径流深度测定方法

Lagoon Environments Around the World - A Scientific Perspective Pub Date : 2019-06-28 DOI: 10.5772/INTECHOPEN.87163

Philip W. Bellamy, H. J. Cho

{"title":"A GIS-Based Approach for Determining Potential Runoff Coefficient and Runoff Depth for the Indian River Lagoon, Florida, USA","authors":"Philip W. Bellamy, H. J. Cho","doi":"10.5772/INTECHOPEN.87163","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.87163","url":null,"abstract":"The Indian River Lagoon system (IRL), spanning ~40% of Florida’s east coast, is one of the nation’s biggest and most biodiverse estuaries. In 2011, a super algal bloom event occurred in the IRL with total nitrogen and phosphorus levels that exceeded historical levels. Scientists suspect that nonpoint source pollution through surface runoff may have had a significant impact on the recent recurring algal blooms. Digital Elevation Model, land cover/land use, and soil data were used to calculate a runoff coefficient for the IRL drainage basin. Rainfall data were used to calculate runoff depth for the study area between the years of 2006–2016. When the monthly runoff depth data for 2011 were compared to a previous study on the 2011 super algal bloom in the lagoon, areas with high runoff visually matched the areas with higher chlorophyll a concentrations. Land development was a significant variable for determining runoff depth ( p < 0.0001), and although used to derive runoff depths, the influence of precipitation was marginally significant ( p = 0.06). Significant spatial autocorrelation indicated local trends between land development and runoff depth ( p < 0.0001). Outputs will aid with decisions on stormwater management to more sustainable land development planning.","PeriodicalId":218910,"journal":{"name":"Lagoon Environments Around the World - A Scientific Perspective","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125419064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Pollution Issues in Coastal Lagoons in the Gulf of Mexico 墨西哥湾沿岸泻湖的污染问题

Lagoon Environments Around the World - A Scientific Perspective Pub Date : 2019-05-29 DOI: 10.5772/INTECHOPEN.86537

A. Botello, Guadalupe de la Lanza Espino, Susana Villanueva Fragoso, Guadalupe Ponce Vélez

{"title":"Pollution Issues in Coastal Lagoons in the Gulf of Mexico","authors":"A. Botello, Guadalupe de la Lanza Espino, Susana Villanueva Fragoso, Guadalupe Ponce Vélez","doi":"10.5772/INTECHOPEN.86537","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.86537","url":null,"abstract":"The coastline of the Mexican Gulf of Mexico is an area of paramount importance. It poses valuable biological and ecological resources such as coastal lagoons, rivers, estuaries, wetlands and swamps. It poses 206 coastal systems including 73 coastal lagoons with high biological richness. Their study shows the physicochemical characteristics and pollution levels into the four more productive lagoons of Tampamachoco, Mandinga, Alvarado in the Veracruz state and Terminos Lagoon in Campeche state, México, have the present characteristics. The lagoons show a wide interval in physiochemical parameters (temperature: 18–32°C, salinity: 11–38 ups, and nutrients: oxygen 1.8–9.0 mg/L, total phosphorus 2.6–123 μ M total nitrogen 5–70 μ M, and chlorophyll 10–50 mg/m 3 ). All of them oscillated between normal to eutrophication condition. The presence of PAHs and some of the high toxicity as anthracene, and chrysene, as well as naphthalene and its methyl derivatives has been reported. Also, chlorinated hydrocarbons used for agriculture purposes and malaria control (DDT, lindane, endosulfan) have been identified in these lagoons. Metals as Cr, Pb, Ni, Cd, and V among others were recently reported in the lagoons considered in this study. Concentrations of pollutants also show significant variations depending on the time and the type of lagoon, or estuary.","PeriodicalId":218910,"journal":{"name":"Lagoon Environments Around the World - A Scientific Perspective","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133697813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7