-Marine habitat mapping using sonar data -Area: Lipsi island -Main attribute: Seagrass -Data source: archipelagos institute of marine conservation -Map resulting from survey (kayak sonar survey) and processed using interpolation algorithm

List of macroinvertebrate taxa associated with experimental dropper replicates. Droppers are 1m long polypropylene ropes attached to existing longlines in seaweed farm located in Ventry Harbour, Co. Kerry Ireland. Treatments: rope seeded with Sacharina latissima sporophytes and unseeded controls. Objectives within WP6 of GENIALG: assessing the biodiversity associated with cultivated seaweed. Dataset consists of macroinvertebrate taxa identified and enumerated by NUIG biologists supervised by project lead researcher Dr. Jose M. Farinas-Franco. The samples were collected in July 2018, three months after deployment. The aim was to characterise fauna associated with cultivated seaweed and ancillary structures. Samples collected as part of the GENIALG project (project ID: 727892, GENIALG - GENetic diversity exploitation for Innovative Macro-ALGal biorefinery, http://genialgproject.eu/). GENIALG was funded by the European Union Horizon2020 programme. The remit of the work was assessing the environmental footprint and ecosystem services provided by seaweed aquaculture in Europe to provide best practice advice to industry.

List of macroinvertebrate taxa associated with experimental dropper replicates. Collected at two test seaweed farms in The Netherlands. Samples collected as part of the GENIALG project (project ID: 727892, GENIALG - GENetic diversity exploitation for Innovative Macro-ALGal biorefinery, http://genialgproject.eu/). GENIALG was funded by the European Union Horizon2020 programme. The remit of the work was assessing the environmental footprint and ecosystem services provided by seaweed aquaculture in Europe to provide best practice advice to industry. A total of twelve seaweed lines (droppers of 2m length) were deployed in the farm at November 21st 2018. Six lines were located on the outer edge of the farm and six lines were located in the middle of the farm. At both locations three lines were seeded with seaweed and three lines were left empty. The ropes were collected on the 24th of April by gently removing the ropes from the water and directly transferring them into plastic bags. On May 14th 2020 droppers were randomly selected and cut from the longlines and processed following the same protocols.

Species abundance and seagrass cover. Calculated from photo quadrats and video recorded by divers along seabed transects surveyed by divers as part of GENIALG monitoring surveys. Seaweed farm located in Ventry Harbour, Co. Kerry (Ireland). The samples were collected at seven different time points along the growing season in 2018 and 2019. Samples collected as part of the GENIALG project (project ID: 727892, GENIALG - GENetic diversity exploitation for Innovative Macro-ALGal biorefinery, http://genialgproject.eu/). GENIALG was funded by the European Union Horizon2020 programme. The remit of the work was assessing the environmental footprint and ecosystem services provided by seaweed aquaculture in Europe to provide best practice advice to industry.

This record is for Approval for Access product AfA128. Information regarding the presence, and percentage cover, of seagrass species at specific marine monitoring points held within the Environment Agency’s BIOSYS database (our main database for storing, manipulating and reporting data from freshwater and marine biological surveys at any taxonomic level). These data represent ground-truthing monitoring for the ecological assessment of seagrasses within transitional and coastal waters of England and Wales. Seagrass data on BIOSYS are updated as new monitoring data are made available. Monitoring for seagrass occurs June to September with records being updated after the sampling season. The extracted data is a subset of the full dataset and only includes data collected/owned by the Environment Agency. Attribution statement: © Environment Agency copyright and/or database right 2015. All rights reserved.

In the Mediterranean region Cymodocea nodosa is widely distributed throughout shallow sites. Therefore, a correct assessment of the status of its meadows is of great importance for the implementation of the Water Framework Directive (WFD), the Marine Strategy Framework Directive (MSFD), and the Habitat Directive (HD), especially for areas where Posidonia oceanica meadows (the most frequently used indicator in the Mediterranean Sea) are rare or not present. The previously proposed index for the evaluation of the status of C. nodosa meadows (CymoSkew) is based on ln-transformed relative frequencies of photosynthetic leaf lengths, which we believe is statistically questionable. Therefore, we further improved the methodology and developed a new index named MediSkew, where ln-transformation is applied to raw data of leaf lengths. More specifically, the index is a combination of two metrics, both based on C. nodosa leaf length: deviation from the reference median length (Medi-) and skewness of the length frequency distribution (-Skew), though greater importance was assigned to the first. To develop the classification criteria for the assessment of the status, also a Pressure Index for Seagrass Meadows (PISM), for the evaluation of pressure–impact relationships, was developed. The MediSkew is meant to be a rapid screening method for wide areas, therefore the index should be tested for the assessment of the status of C. nodosa meadows throughout Mediterranean coastal waters. Martina Orlando-Bonaca, Janja Francé, Borut Mavric, Mateja Grego, Lovrenc Lipej, Vesna Flander-Putrle, Milijan Šiško, Annalisa Falace, A new index (MediSkew) for the assessment of the Cymodocea nodosa (Ucria) Ascherson meadow's status, Marine Environmental Research, Volume 110, 2015, Pages 132-141, ISSN 0141-1136, https://doi.org/10.1016/j.marenvres.2015.08.009. (http://www.sciencedirect.com/science/article/pii/S0141113615300374)