Broadscale habitat (EUNIS level 3) for East of Haig Fras recommended Marine Conservation Zone (rMCZ)

Updated habitat map resulting from an integrated analysis of the 2012 (CEND 3/12a) and 2013 (CEND 5/13) dedicated survey data for East of Haig Fras recommended Marine Conservation Zone (rMCZ). It shows the seabed at the site to be a heterogenous fine scale mosaic of sand, coarse and mixed sediments, with mud habitat in deeper areas. The two broadscale habitats ‘A5.1 Subtidal coarse sediment’ and ‘A5.4 Mixed sediments’ are presented as a complex ‘A5.1/A5.4 Subtidal coarse/mixed sediments’. They show no differentiation in their acoustic or topographical properties that would allow them to be mapped separately. The ‘A4 Circalittoral rock’ habitat is present in scattered small patches. Created with Object Based Image Analysis (OBIA) on acoustic data and groundtruthed samples. Acoustic data gathered by Gardline under tender, groundtruthing gathered by Cefas on cruises CEND 3/12a and CEND 5/13.本数据集为针对黑格拉斯以东推荐海洋保护区（recommended Marine Conservation Zone，rMCZ）的2012年（CEND 3/12a）与2013年（CEND 5/13）专项调查数据开展整合分析后生成的更新版生境地图。该地图显示，研究区域海底呈现异质性精细尺度镶嵌结构，由砂质、粗粒及混合沉积物构成，深水区分布有泥质生境。两类宽尺度生境"A5.1 潮下带粗沉积物"与"A5.4 混合沉积物"被整合为复合生境"A5.1/A5.4 潮下带粗/混合沉积物"，二者在声学与地形特征上无显著差异，无法单独成图。"A4 环近海岩质生境"以分散的小型斑块形式分布。 本地图基于声学数据与实地验证样本，通过面向对象影像分析（Object Based Image Analysis，OBIA）方法生成。声学数据由Gardline公司受委托采集，实地验证样本由Cefas在CEND 3/12a与CEND 5/13航次中采集获取。