In laboratory/on board benthic flux measurements simulating different environmental conditions: early results of a new core incubation system (Abstract/Poster in atti di convegno)

Type
Label
  • In laboratory/on board benthic flux measurements simulating different environmental conditions: early results of a new core incubation system (Abstract/Poster in atti di convegno) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Alternative label
  • Matteucci G. (1), Fiesoletti F. (1), Testoni A. (1), Catalano G. (2), Ravaioli M. (3), Focaccia P.(3), Giordano P. (3), Ferrari C.(5), Tarlazzi S (4) (2011)
    In laboratory/on board benthic flux measurements simulating different environmental conditions: early results of a new core incubation system
    in Convegno Sednet "Sediments and Biodiversity: bridging the gap between science and policy", Thetis S.p.A. Arsenale di Venezia. Venezia, 6-9 aprile 2011
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Matteucci G. (1), Fiesoletti F. (1), Testoni A. (1), Catalano G. (2), Ravaioli M. (3), Focaccia P.(3), Giordano P. (3), Ferrari C.(5), Tarlazzi S (4) (literal)
Note
  • Abstract (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • (1) Gruppo CSA SpA Rimini- (2) CNR-ISMAR UOS Trieste - (3) CNR-ISMAR UOS Bologna - (4) ARPA-DAPHNE Cesenatico (literal)
Titolo
  • In laboratory/on board benthic flux measurements simulating different environmental conditions: early results of a new core incubation system (literal)
Abstract
  • Introduction: Benthic environments are subjected to different impacts (natural and anthropic), from local to catchment scale, especially in highly dynamic and variable ecosystems, such as marine and transitional environments. Core sediment incubation is a good alternative to the in situ determinations as it can study benthic environments and their possible responses simulating the boundary conditions, that are otherwise difficult to be determined.The aim of this work is to verify and test sediment core incubations under different boundary conditions and in different sedimentary characteristics. Methods: The core incubation system consists of six separated microcosms (Fig. 1), 5 of which are filled with sediment core and bottom water and 1 with only bottom water (blank/control sample). Each microcosm is equipped with autonomous and adjustable thermostatic, circulation and dark/light cycling systems. Electrodes measure in continuous physical and chemical bottom water parameters according to the aim of studies. In addition, samples of water just above the sediment can be collected by means of a specifically designed sampling system for a large set of parameters ranging from nutrient and contaminants content to dissolved gases. Results: Sediment incubation experiments were carried out to measure benthic oxygen fluxes. Sediments with different physical and physico-chemical characteristics were sampled in three sites: the area SE of the Po River Delta (21 m depth), the Cesenatico area (8.6 m depth) and the Fossa di Pomo area (220 m depth). In each experiment, cores were incubated for 16-24 h under low (<10 rpm) and high stirring velocity (125 rpm) to mimic different degree of current until to 48 m/s. The data collected in calm conditions were comparable to benthic flux values reported in the literature. Moreover the oxygen consumed by sediments under stronger hydrodynamic conditions (about 40 mmol/m2/day) was two times higher than that of sediments under low water circulation (about 16 mmol/m2/day). Discussion: In this work different water mixing and bottom sediment resuspension were reproduced in order to simulate different environment conditions (natural and/or anthropogenic). This leads to both understand the processes developing in the aquatic systems and predict hazards to the ecosystems for the integrated management of the environments, as defined by the European Community (Fig. 1). Acknowledgements: This work was carried out in the framework of the RISE project (Research and development for a sediment Incubation SystEm) co- funded by POR-FESR Programme. The RISE project is linked with other National and International research projects (Anocsia-Firb and Emma-EU Life) and technological application in the framework of Technopoles (POR_FESR). (literal)
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