| 要旨トップ | 目次 | 日本生態学会第68回全国大会 (2021年3月、岡山) 講演要旨
ESJ68 Abstract


一般講演(ポスター発表) P1-221  (Poster presentation)

UAVsと地上調査を併せたアマモ場の時空間変動の解析
Spatio-temporal analysis on seagrass bed dynamics using UAVs and ground surveys

*田原聖(北海道大学環境科学院), 伊藤美菜子(北海道大学環境科学院), 仲岡雅裕(北海道大学FSC)
*Satoru TAHARA(Env. Sci., Hokkaido Univ.), Minako ITO(Env. Sci., Hokkaido Univ.), Masahiro NAKAOKA(FSC, Hokkaido Univ.)

Seagrass forms meadow called "seagrass bed" which is known for various ecosystem functions and services. Seagrass beds generally showed large seasonal variation affected by various environmental factors that operate at different scales. Patterns of seasonal variation may differ at different spatial scales, e.g., at a shoot scale and a meadow scale, which is difficult to quantitatively evaluate based on single survey method. The purpose of this study is to investigate seagrass seasonal dynamics using different survey methods that target different spatial scales. We conducted in-situ seagrass collections and UAV (drone) survey, at two sites in a seagrass bed of Akkeshi-ko estuary (Hokkaido) from May to December 2020. At each site, we set several sampling points along depth gradient. We collected seagrass for biomass measurement and took aerial photos using a drone to analyze spatial dynamics of meadow around the sampling points. Patterns of seasonal variation varied at different spatial scales and among points/depth. Variations in biomass were greater at deeper sampling points, whereas areal variations were greater at shallower points. The present study highlights the importance of conducting multi-scale surveys to understand seasonal dynamics of seagrass beds.


日本生態学会