{"title":"孟加拉国东南海岸对比生态系统中的浮游植物：季节性和环境因素的影响","authors":"Sazeed Mehrab Souhardya, Uttam Kumar, Md Mehedi Iqbal, Ilias Ebne Kabir, Md Masum Billah, Chayan Das, Shawon Barman, Sanjoy Das, Jannatul Ferdous Shawlin, Sk Istiaque Ahmed, Jewel Das","doi":"10.1007/s10661-025-13699-y","DOIUrl":null,"url":null,"abstract":"<div><p>Phytoplankton forms the foundation of the aquatic food chain, with their community composition dependent on environmental conditions. Research on phytoplankton communities in relation to environmental variables across diverse coastal ecosystems in Bangladesh remains limited and focusing on small or discrete areas. This study aimed to explore phytoplankton dynamics across contrasting ecosystems characterized by varying salinity levels (ranging from 0 to 36 ppt), encompassing riverine to marine ecosystem. We identified 48 species, encompassing 28 genera and 4 groups: diatoms (81.25%), blue-green algae (10.41%), dinoflagellates (4.18%), and green algae (4.16%), with <i>Coscinodiscus concinnus</i> (W. Smith) being the most dominant species. Seasonality significantly affected phytoplankton diversity and richness, with the highest diversity (<i>H</i> = 3.55) and richness (40 species) recorded in winter. Conversely, contrasting ecosystems had an effect on richness, but not on diversity with the highest 42 species in the estuarine ecosystems. ANOVA showed notable spatio-temporal heterogeneity in species abundance (<i>p</i> < 0.05), with a peak in the estuarine ecosystem during winter. Variability in environmental factors was also significant, with the exception of pH with seasons, while alkalinity and transparency showed insignificant differences among contrasting ecosystems. We identified distinct seasonal community successions, with a unique species composition in the winter, while the monsoon and pre-monsoon communities exhibited some degree of convergence. A strong correlation between species abundance and environmental factors was evident, especially salinity, alkalinity, and dissolved oxygen, playing major role in species distribution and seasonality. This study provides insights into phytoplankton dynamics and their response to environmental factors, providing baseline ecological information for ecosystem management in the region.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 3","pages":""},"PeriodicalIF":3.0000,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Phytoplankton in contrasting ecosystems of the southeastern coast of Bangladesh: effects of seasonality and environmental factors\",\"authors\":\"Sazeed Mehrab Souhardya, Uttam Kumar, Md Mehedi Iqbal, Ilias Ebne Kabir, Md Masum Billah, Chayan Das, Shawon Barman, Sanjoy Das, Jannatul Ferdous Shawlin, Sk Istiaque Ahmed, Jewel Das\",\"doi\":\"10.1007/s10661-025-13699-y\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Phytoplankton forms the foundation of the aquatic food chain, with their community composition dependent on environmental conditions. Research on phytoplankton communities in relation to environmental variables across diverse coastal ecosystems in Bangladesh remains limited and focusing on small or discrete areas. This study aimed to explore phytoplankton dynamics across contrasting ecosystems characterized by varying salinity levels (ranging from 0 to 36 ppt), encompassing riverine to marine ecosystem. We identified 48 species, encompassing 28 genera and 4 groups: diatoms (81.25%), blue-green algae (10.41%), dinoflagellates (4.18%), and green algae (4.16%), with <i>Coscinodiscus concinnus</i> (W. Smith) being the most dominant species. Seasonality significantly affected phytoplankton diversity and richness, with the highest diversity (<i>H</i> = 3.55) and richness (40 species) recorded in winter. Conversely, contrasting ecosystems had an effect on richness, but not on diversity with the highest 42 species in the estuarine ecosystems. ANOVA showed notable spatio-temporal heterogeneity in species abundance (<i>p</i> < 0.05), with a peak in the estuarine ecosystem during winter. Variability in environmental factors was also significant, with the exception of pH with seasons, while alkalinity and transparency showed insignificant differences among contrasting ecosystems. We identified distinct seasonal community successions, with a unique species composition in the winter, while the monsoon and pre-monsoon communities exhibited some degree of convergence. A strong correlation between species abundance and environmental factors was evident, especially salinity, alkalinity, and dissolved oxygen, playing major role in species distribution and seasonality. This study provides insights into phytoplankton dynamics and their response to environmental factors, providing baseline ecological information for ecosystem management in the region.</p></div>\",\"PeriodicalId\":544,\"journal\":{\"name\":\"Environmental Monitoring and Assessment\",\"volume\":\"197 3\",\"pages\":\"\"},\"PeriodicalIF\":3.0000,\"publicationDate\":\"2025-02-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Environmental Monitoring and Assessment\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10661-025-13699-y\",\"RegionNum\":4,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Monitoring and Assessment","FirstCategoryId":"93","ListUrlMain":"https://link.springer.com/article/10.1007/s10661-025-13699-y","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
Phytoplankton in contrasting ecosystems of the southeastern coast of Bangladesh: effects of seasonality and environmental factors
Phytoplankton forms the foundation of the aquatic food chain, with their community composition dependent on environmental conditions. Research on phytoplankton communities in relation to environmental variables across diverse coastal ecosystems in Bangladesh remains limited and focusing on small or discrete areas. This study aimed to explore phytoplankton dynamics across contrasting ecosystems characterized by varying salinity levels (ranging from 0 to 36 ppt), encompassing riverine to marine ecosystem. We identified 48 species, encompassing 28 genera and 4 groups: diatoms (81.25%), blue-green algae (10.41%), dinoflagellates (4.18%), and green algae (4.16%), with Coscinodiscus concinnus (W. Smith) being the most dominant species. Seasonality significantly affected phytoplankton diversity and richness, with the highest diversity (H = 3.55) and richness (40 species) recorded in winter. Conversely, contrasting ecosystems had an effect on richness, but not on diversity with the highest 42 species in the estuarine ecosystems. ANOVA showed notable spatio-temporal heterogeneity in species abundance (p < 0.05), with a peak in the estuarine ecosystem during winter. Variability in environmental factors was also significant, with the exception of pH with seasons, while alkalinity and transparency showed insignificant differences among contrasting ecosystems. We identified distinct seasonal community successions, with a unique species composition in the winter, while the monsoon and pre-monsoon communities exhibited some degree of convergence. A strong correlation between species abundance and environmental factors was evident, especially salinity, alkalinity, and dissolved oxygen, playing major role in species distribution and seasonality. This study provides insights into phytoplankton dynamics and their response to environmental factors, providing baseline ecological information for ecosystem management in the region.
期刊介绍：
Environmental Monitoring and Assessment emphasizes technical developments and data arising from environmental monitoring and assessment, the use of scientific principles in the design of monitoring systems at the local, regional and global scales, and the use of monitoring data in assessing the consequences of natural resource management actions and pollution risks to man and the environment.
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