AQUA USERS web AQUAculture USEr driven operational Remote Sensing information services

Ocean Optics Conference

Prof Vanda Brotas of FCUL is presenting first results of the development of aquaculture indicators at the Ocean Optics XXII in Portland, Maine.

On Thursday, Oct 30, she will give her talk on "Deriving Aquaculture indicators from Earth Observation in the AQUA-USERS project (AQUAculture USEr driven operational Remote Sensing information Services)" The abstract of her talk:

Aquaculture is dependent on water quality of coastal ecosystems. The FP7 AQUA-USERS aims to provide the aquaculture industry with user-relevant and timely information based on the most up-to-date satellite data and innovative optical in-situ measurements. Awareness of anomalies of phytoplankton biomass to the typical seasonal cycle is crucial for aquaculture prospects. We show results of a phenology study performed in aquaculture areas of interest at Portugal, U.K., Norway, Netherlands and Denmark, using a chlorophyll-a daily climatological year, calculated from the ESA Ocean Colour - Climate Change Initiative project, which consists on a SeaWiFS, MODIS-Aqua and MERIS merged 15-year global time series on a large scale. For small scale analysis MERIS OC5 with 300 m resolution was used.

For all regions a typical bloom lasts 60-90 days, except for Netherlands, where bloom may occur for longer periods. The time of bloom peak occurs during April/May for Netherlands, June/July for Portugal, and is region dependent for Norway and UK. Further, the present work also focuses on harmful algal bloom events, by analysis of historical records, and algorithm training with available images. This is complemented with new data on knowledge of phytoplankton absorption, pigment content, biovolume and ecological requirements of recurrent HABs species of the studied regions. Assessment of anomalous chlorophyll-a with temperature and other environmental information, along with HABs events, contribute to the final product of AQUA-USERS: a web portal and mobile application that bring together satellite information on water quality and a set of user-determined management decisions.

aquaculture indicator

Climatological annual average for chlorophyll a for the Portuguese coast (top left, from OC-CCI data). Bloom duration (top right, from MERIS-FR), day of bloom start (bottom left, from MERIS-FR) and maximum (bottom right, from MERIS-FR) for Algarve sub-region. Arrow shows location of Cape S. Vincent.