Quantitative delimitation of radiant belt toward lake of lake-terrestrial ecotone

Abstract Background Lake-terrestrial ecotone is a transition zone between terrestrial and aquatic ecosystems. Linking land lake, it thus highly sensitive vulnerable to disturbances. It includes three parts, namely, radiant belt toward land, shoreline lake. Extending from multi-year average low water level line open water, lake key part of lake-terrestrial ecotone. However, the delimitation method for unsolved, which big obstacle protecting effectively. Wave major hydrodynamic factor in lakes, especially large shallow lakes. For linking landward waterward directions, boundary may be affected by waves. Hence, exampled as Lake Taihu, this research was carried out wave perspective. Results In July 2021, total 12 species macrophyte were collected, including 3 floating-leaved 9 submerged within Taihu. Aquatic incorporated into calibrated models driven constant winds via MIKE21 SW. height attenuation successfully simulated, ranging − 0.19% ~ 8.89% under eastern-wind condition 0.08% 23.37% western-wind condition. general, gradually attenuates shore water. The abrupt change point relative used A 26 sampling lines bank around whole Taihu set, 701 2155 m. Based on setups lines, range about 1 2 km. Conclusions novel approach developed quantitative Both wind forcing vegetation has slight impact results delimitation, indicating feasibility approach. determines theoretical ecotone, helpful more precise protection restoration Moreover, could provide potential lakes with similar conditions.