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Water chemistry and substrate type as major determinants of molluscan feeding habit and life-mode in lagoon sediments

文献类型：期刊论文

作者Abdelhady, Ahmed Awad1,2; Khalil, Mahmoud M.1; Ismail, Esam1; Fan, Jiawei2; Zhang, Shengrui2; Xiao, Jule2
刊名ESTUARINE COASTAL AND SHELF SCIENCE
出版日期2019-05-01
卷号220页码:120-130
关键词Community ecology Mollusca Salinity gradient Substrate type Nile-Delta Coastal lagoons
ISSN号0272-7714
DOI10.1016/j.ecss.2019.02.019
英文摘要Few organisms can live in harsh transitional waters due to highly variable and rapid changeable physicochemical conditions. Fortunately, connecting the community structure of such fauna to specific environmental parameters can be used in tracing past and recent environmental changes. Herein, we analyzed the benthic communities in the Manzala lagoon (Nile-Delta), a region very impacted by the construction of the High-Dam at Aswan, along the inshore-offshore gradient. Approx. 3000 specimens belonging to 31 species sampled in 54 sampling sites were identified. The environmental and biological data were subjected to multivariate data analyses. Hierarchical clustering and non-metric multidimensional scaling identified three biotopes along a gradient of water salinity and sediment grain-size. The epifaunal/infaunal ratio was negatively correlated with salinity (R2 = - 0.72, p < 0.01). The low salinity-stations with a high content of silt and clay sediments were dominated by deposit-feeders, opportunistic gastropods. In contrast, the suspension-feeding bivalves dominated the more saline water and sand-sized sediments (R = 0.83, p < 0.001) near the Mediterranean outlets. The general low diversity and high dominance in the lagoon indicate high environmental stress and biodiversity loss as the background freshwater species have declined and only a few opportunistic taxa have flourished. In addition, a specific salinity-range was estimated at both species and community level. The results confirm that salinity and substrate type are major determinants for the structure of the molluscan community (feeding habit and life-mode) in marginal marine environments. Consequently, the feeding habit and life-mode of the mollusks, which have a continuous and very complete fossil record, can be used as a robust indicator for paleosalinity and paleo-hydrodynamics.
WOS关键词MAGHARA NORTH SINAI ; NILE DELTA ; BENTHIC ASSOCIATIONS ; EGYPT IMPLICATIONS ; FRESH-WATER ; SHELL SHAPE ; SALINITY ; COMMUNITIES ; BAY ; POPULATIONS
资助项目CAS (Chinese Academy of Science)[2017VCC0013]
WOS研究方向Marine & Freshwater Biology ; Oceanography
语种英语
WOS记录号WOS:000464488000011
出版者ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
资助机构CAS (Chinese Academy of Science) ; CAS (Chinese Academy of Science) ; CAS (Chinese Academy of Science) ; CAS (Chinese Academy of Science) ; CAS (Chinese Academy of Science) ; CAS (Chinese Academy of Science) ; CAS (Chinese Academy of Science) ; CAS (Chinese Academy of Science)
源URL[http://ir.iggcas.ac.cn/handle/132A11/91307]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Abdelhady, Ahmed Awad
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
2.Menia Univ, Geol Dept, Fac Sci, El Minia 61519, Egypt
推荐引用方式
GB/T 7714		 Abdelhady, Ahmed Awad,Khalil, Mahmoud M.,Ismail, Esam,et al. Water chemistry and substrate type as major determinants of molluscan feeding habit and life-mode in lagoon sediments[J]. ESTUARINE COASTAL AND SHELF SCIENCE,2019,220:120-130.
APA Abdelhady, Ahmed Awad,Khalil, Mahmoud M.,Ismail, Esam,Fan, Jiawei,Zhang, Shengrui,&Xiao, Jule.(2019).Water chemistry and substrate type as major determinants of molluscan feeding habit and life-mode in lagoon sediments.ESTUARINE COASTAL AND SHELF SCIENCE,220,120-130.
MLA Abdelhady, Ahmed Awad,et al."Water chemistry and substrate type as major determinants of molluscan feeding habit and life-mode in lagoon sediments".ESTUARINE COASTAL AND SHELF SCIENCE 220(2019):120-130.

入库方式： OAI收割

来源：地质与地球物理研究所

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