Potential Reefs (1170)

The marine habitat type data concerns the modelling work carried out within the Finnish Inventory Programme for the Underwater Marine Environment (VELMU) in spring 2015. The task was done in cooperation between the Geological Survey of Finland (GTK) and Åbo Academi University (ÅA). The work included the modelling of the marine habitats included in the Annex 1 of the Habitats Directive: reefs (1170) and sandbanks, which are slightly covered by sea water all the time (1110). The aforementioned marine habitat types are specified on the basis of Seabed substrate type and topographic form and they can overlap one another. The objective was to produce comprehensive maps of the occurrences of reefs and sandbanks throughout the entire marine area of Finland based on the best data available. The criteria to determine the marine habitats were discussed with the responsible bodies and the instructions (version 5.1), which include more specific criteria for determining marine habitat types than the Natura 2000 Habitats Manual (Airaksinen & Karttunen 2001), for a Natura 2000 inventory were utilised. On the basis of different criteria and test analyses, a decision was made to model potential rocky reefs which includes sites that are likely to have reef occurrences. The data concerning the marine habitats of restricted areas has been removed.本海洋生境类型数据集的相关建模工作，开展于2015年春季的芬兰水下海洋环境调查计划（Finnish Inventory Programme for the Underwater Marine Environment，VELMU）框架内。本次任务由芬兰地质调查局（Geological Survey of Finland，GTK）与奥博学术大学（Åbo Academi University，ÅA）合作完成。工作内容涵盖对《生境指令》（Habitats Directive）附件一所列海洋生境的建模，包括编号1170的岩礁，以及编号1110的常年轻度被海水覆盖的沙洲。前述海洋生境类型依据海底底质类型与地形形态划定，且两类生境可相互重叠。本研究的目标为基于现有最优数据，绘制芬兰全海域内岩礁与沙洲分布的完整专题地图。海洋生境的判定标准已与相关负责机构研讨确定，并采用了适用于Natura 2000调查的指导手册（版本5.1）；该手册相较于《Natura 2000生境手册》（Airaksinen & Karttunen 2001），包含了更为具体的海洋生境类型判定细则。基于不同判定标准与多组测试分析，最终决定对潜在岩礁开展建模，涵盖所有疑似存在岩礁分布的区域。受限区域的海洋生境相关数据已被移除。