globalchange  > 过去全球变化的重建
DOI: 10.1016/j.marpolbul.2017.10.029
Scopus记录号: 2-s2.0-85031411647
论文题名:
Seasonal variability of picophytoplankton under contrasting environments in northern Tunisian coasts, southwestern Mediterranean Sea
作者: Salhi N.; Zmerli Triki H.; Molinero J.C.; Laabir M.; Sehli E.; Bellaaj-Zouari A.; Daly Yahia N.; Kefi-Daly Yahia O.
刊名: Marine Pollution Bulletin
ISSN: 0025-326X
EISSN: 1879-3363
出版年: 2018
卷: 129, 期:2
起始页码: 866
结束页码: 874
语种: 英语
英文关键词: Bay of Bizerte ; Eutrophication ; Lagoon of Bizerte ; Picophytoplankton ; Prochlorococcus ; Synechococcus
Scopus关键词: Ecology ; Eutrophication ; Lakes ; Nutrients ; Bay of Bizerte ; Lagoon of Bizerte ; Picophytoplankton ; Prochlorococcus ; Synechococcus ; Ecosystems
Scopus学科分类: Agricultural and Biological Sciences: Aquatic Science ; Earth and Planetary Sciences: Oceanography ; Environmental Science: Pollution
英文摘要: We investigated at the single cell level during 16 months (June 2012 to September 2013) the temporal distribution of picophytoplankton (picoeukaryotes, Synechococcus and Prochlorococcus) communities in two contrasted ecosystems: the Bay of Bizerte characterised by an oligotrophic regime typical of the Mediterranean Sea and the Bizerte Lagoon that exhibits a mesotrophic/eutrophic state. We aimed at depicting seasonal variations and quantifying the relationships between the environmental factors and the structure and abundance of picophytoplankton communities. Results showed that picophytoplankton groups were able to grow under a wide range of environmental conditions varying seasonally, although their abundances and contributions to the total chlorophyll biomass significantly varied and showed importance in the Bay of Bizerte. Synechococcus was the most abundant group reaching 225 ∗ 103 cells·cm− 3 in the Bay and 278 ∗ 103 cells·cm− 3 in the lagoon. This group was present all over the year in both ecosystems. Structural equation model results pointed out a different configuration regarding the picophytoplankton environmental drivers. The complexity of the configuration, i.e. number of significant links within the system, decreased under enhanced eutrophication conditions. The less exposure to anthropogenic stress, i.e. in the Bay of Bizerte, highlight a larger role of nutrient and hydrological conditions on the seasonal variations of picophytoplankton, whereas a negative effect of eutrophication on picophytoplankton communities was unveiled in the Bizerte Lagoon. We stress that such influence may be exacerbated under expected scenarios of Mediterranean warming conditions and nutrient release in coastal ecosystems. © 2017 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/88182
Appears in Collections:过去全球变化的重建
全球变化的国际研究计划

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作者单位: Institut National Agronomique de Tunisie, IRESA – Université de Carthage, 43 avenue Charles Nicolle, Tunis, Tunisia; Laboratoire de Biodiversité et Fonctionnement des Systèmes Aquatiques, Faculté des Sciences de Bizerte, Université de Carthage, Zarzouna, Tunisia; GEOMAR Helmholtz Center for Ocean Research, Kiel, Germany; Center for Marine Biodiversity, Exploitation and Conservation (MARBEC), Montpellier University, CNRS, IRD, Ifremer, Place Eugène, Bataillon, CC093, Montpellier Cedex 5, France; Institut National des Sciences et Technologies de la Mer, 28 rue 2 Mars 1934, Carthage Salammbô, Tunisia; Marine Ecology/Food Webs, Duesternbrooker Weg 20, Kiel, Germany; Laboratory of Water, Membrane and Biotechnologies of Environnement, Centre of Research and Water Technologies (CERTE), Technopark of Borj-Cedria, Tunisia

Recommended Citation:
Salhi N.,Zmerli Triki H.,Molinero J.C.,et al. Seasonal variability of picophytoplankton under contrasting environments in northern Tunisian coasts, southwestern Mediterranean Sea[J]. Marine Pollution Bulletin,2018-01-01,129(2)
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