Spatial genetic structure in a crustacean herbivore highlights the need for local considerations in Baltic Sea biodiversity management

Incorporating species' eco-evolutionary responses to human-caused disturbances remains a challenge in marine management efforts. A prerequisite is knowledge of geographic structure and scale of genetic diversity and connectivity - the so-called seascape genetic patterns. The Baltic Sea is an excellent model system for studies linking seascape genetics with effects of anthropogenic stress. However, seascape genetic patterns in this area are only described for a few species and are completely unknown for invertebrate herbivores, which constitute a critical part of the ecosystem. This information is crucial for sustainable management, particularly under future scenarios of rapid environmental change. Here, we investigate the population genetic structure among 31 locations throughout the Baltic Sea, of which 45 % were located in marine protected areas, in one of the most important herbivores of this region, the isopod crustacean Idotea balthica, using an array of 33,774 genome-wide SNP mark...

将物种对人为干扰的生态-进化响应纳入海洋管理体系，仍是当前海洋管理工作的一项核心挑战。其首要前提是明晰遗传多样性与连通性的地理格局及尺度——即所谓的海景观遗传格局。波罗的海是关联海景观遗传学与人为胁迫效应研究的绝佳模式系统。然而，该区域的海景观遗传格局仅在少数物种中得到报道，而作为生态系统关键组成部分的无脊椎草食动物类群，其相关数据仍完全空白。此类信息对可持续海洋管理至关重要，尤其在未来环境快速变化的情景下更是如此。本研究以该区域最重要的草食动物类群之一——等足类甲壳动物巴尔特扁水虱（Idotea balthica）为研究对象，利用33774个全基因组单核苷酸多态性（Single Nucleotide Polymorphism, SNP）标记，对波罗的海全域31个采样点的种群遗传结构展开分析，其中45%的采样点位于海洋保护区（Marine Protected Area, MPA）。