The effects of the herbicide Roundup® (glyphosate) on natural marine microbial communities were assessed in a 7 day field experiment using microcosms. Bottles were maintained underwater at 6 m depth, and 10% of their water content was changed every other day.The comparison of control microcosms and surrounding surface water showed that the microcosm system tested here can be considered as representative of the natural surrounding environment. A Temporal Temperature Gradient gel Electrophoresis (TTGE) was run on 16S This study demonstrates that a disturbance was caused to the marine microbial community exposed to 1 µg L -1 Roundup concentration, a value typical of those reported in coastal waters during a run-off event.
Benedetti et al. Temporal Variability of Plankton in the Iroise Sea copepods (members of the Calanidae) are more abundant in spring than in summer and fall. We propose several hypotheses to explain the observed temporal patterns and we underline their importance for understanding the dynamics of other components of the food-web (such as sardines). Our study is a first step toward the inclusion of the planktonic compartment into the planning of the resources and diversity conservation within the Marine Protected Area.
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