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Project Deliverable D50 Report on Best Practices ... - ESONET NoE

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Development of an Automated Protocol to Analyse the Temporal Dynamics of Hydrothermal<br />

Ecosystems from Video Imagery and Temperature Time-Series<br />

Sarrazin J., Sarradin P.-M., Gauthier O., Mercier G.<br />

•Scientific objectives<br />

•To study community dynamics and successi<strong>on</strong> patterns <strong>on</strong> high temperature<br />

hydrothermal edifices;To link faunal dynamics to envir<strong>on</strong>mental changes and<br />

catastrophic disturbances;To start evaluating the role of biotic factors <strong>on</strong> community<br />

structure.<br />

•Realized sampling<br />

•Tour Eiffel (Lucky Strike; Mid Atlantic Ridge; 1650 m depth)<br />

•Tempo ecological module: video camera (45 days), [Fe] (6 m<strong>on</strong>ths), T°C (18 m<strong>on</strong>ths)<br />

•High frequency (30 sec) T°C measurements: 24 probes, 11 days<br />

•Ongoing methodological developments<br />

•Data quality verificati<strong>on</strong><br />

•Manual extracti<strong>on</strong> of imagery data & links with envir<strong>on</strong>mental factors<br />

•Automated image analysis (textures, shapes, surfaces...)<br />

•Modelisati<strong>on</strong> of temporal and spatial T°C variati<strong>on</strong><br />

•Trend identificati<strong>on</strong> & extracti<strong>on</strong><br />

•Principal Comp<strong>on</strong>ents of Neighboor Matrices<br />

•Identificati<strong>on</strong> of optimal analysis parameters (reading frames, sampling frequency...)<br />

•Automatisati<strong>on</strong> of T analysis<br />

<str<strong>on</strong>g>Deliverable</str<strong>on</strong>g> #50 - update October 2010 155

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