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涉及2015年春季芬兰水下海洋环境调查计划（Finnish Inventory Programme for the Underwater Marine Environment，缩写VELMU）框架内开展的建模工作。本次任务由芬兰地质调查局（Geological Survey of Finland，缩写GTK）与奥博学术大学（Åbo Akademi University，缩写ÅA）合作完成。本次建模工作涵盖《生境指令》（Habitats Directive）附录1规定的海洋生境类型：岩礁（1170）以及常年被轻度海水覆盖的沙洲（1110）。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。本次工作的目标是基于现有最优数据，绘制芬兰全域海域内岩礁与沙洲的完整分布专题地图。本次Natura 2000调查所采用的海洋生境判定标准已征询相关主管部门意见，并采用了《指南（版本5.1）》中的相关内容；该指南相较于《Natura 2000生境手册》（Airaksinen与Karttunen，2001），包含了更为细化的海洋生境类型判定准则。基于多套判定标准与测试分析结果，最终确定对潜在岩礁进行建模，建模范围涵盖所有疑似存在岩礁分布的区域。受限区域内的海洋生境相关数据已被移除。