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Zooplankton dynamics in a changing environment: A 13-year survey in the northwestern Mediterranean Sea.
Marine Environmental Research ( IF 3.3 ) Pub Date : 2020-03-31 , DOI: 10.1016/j.marenvres.2020.104962
Lovina Fullgrabe 1 , Philippe Grosjean 2 , Sylvie Gobert 3 , Pierre Lejeune 4 , Michèle Leduc 4 , Guyliann Engels 2 , Patrick Dauby 5 , Pierre Boissery 6 , Jonathan Richir 7
Affiliation  

Dynamics of the subsurface (2–3 m) mesozooplankton (i.e. > 200 μm) in the Bay of Calvi (Corsica, France) were explored, combining time series (2004–2016) of 14 zooplankton groups, wind gusts, water temperature, nitrate and chlorophyll-a. Zooplankton data was obtained through image analysis. While contrasted group-specific seasonal patterns were observed, the most productive zooplankton annual event occurred in April (spring peak), concentrating on average 25% of the total annual abundance. A “typical” year was defined based on the annual succession of different community states, highlighting particular years (2007, 2015 and 2012), mainly characterized by weak spring peak. Environmental influences on the interannual variability of zooplankton were explored and while relationship between chlorophyll-a and zooplankton abundance was unclear, the availability of nutrients (December–March), potentially mediated via the wind regime (October–January) seemed to be essential to the occurrence of the spring peak. Additionally, we observed an influence of temperature, with winter thermal thresholds (between 12.1 °C and 13.4 °C) conditioning the spring peak. Also, the occurrence of lower annual abundances after 2010 was synchronous with the sharp increase of seawater warming trend, especially regarding winter temperature (0.30 °C.year−1). Finally, winter North Atlantic Oscillation (NAO) was found to be correlated to both winter water temperature and spring peak abundance which suggests large-scale processes to impact regional zooplankton community.



中文翻译:

不断变化的环境中的浮游动物动态:在地中海西北部进行的为期13年的调查。

结合14个浮游动物群的时间序列(2004-2016),阵风,水温,硝酸盐,探索了卡尔维湾(法国科西嘉)中层(2-3 m)中层浮游动物(即> 200μm)的动力学。和叶绿素a。通过图像分析获得了浮游动物数据。尽管观察到了不同的群体特定季节模式,但生产力最高的浮游动物年度事件发生在四月(春季高峰),平均集中在总年丰度的25%。根据不同社区国家的年度继承来定义“典型”年份,突出显示特定年份(2007、2015和2012),主要特征是春季高峰不高。探讨了环境因素对浮游动物年际变化的影响,同时探讨了叶绿素a和浮游动物的丰度尚不清楚,可能通过风态(10月至1月)介导的养分(12月至3月)的可用性似乎对春季高峰的发生至关重要。此外,我们观察到温度的影响,冬季温度阈值(在12.1°C和13.4°C之间)限制了春季高峰。此外,2010年以后年丰度的降低与海水变暖趋势的急剧增加是同步的,特别是在冬季温度(0.30°C.year -1)方面。最后,冬季北大西洋涛动(NAO)与冬季水温和春季高峰丰度都相关,这表明影响区域浮游动物群落的大规模过程。

更新日期:2020-03-31
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