論文の公開元へ木曽川水系一支流におけるアジメドジョウ Niwaella delicata の生息環境
概要
River systems are hierarchically organized from the higher-scale systems to the lower-scale systems. We examined the presence or absence of the Ajime-loach, Niwaella delicata, across the Nishino River drainage, a part of the Kiso River systems, Nagano Prefecture, Japan, to determine its habitat characteristics at both high-scale (i.e. topographical and geological) and low-scale (i.e. microhabitat) environmental factors. We found association of Ajime-loach occurrence with high link-magnitude characteristics with relatively low levels of slope and dissolved oxygen. At the high scale environmental factors, the occurrence was associated with the amount of underground riverbed flows. Our results suggest that the Ajime-loach prefers high-scale environmental characteristics that depend on topographical and geological factors.
