@article{oai:kanazawa-u.repo.nii.ac.jp:00012901,
 author = {Shirasaki, Hitoshi and Sato, Masaji},
 issue = {1},
 journal = {植物地理・分類研究 = The journal of phytogeography and toxonomy},
 month = {Jun},
 note = {The relationships among climatic conditions, phenology and distribution were investigated for the moss Pogo-natum urnigerum in Niigata Prefecture and adjacent regions. The moss is frequent in the interior mountainous areas, but very rare in the coastal lowlands including the midwestern area of the prefecture. Although fertiliza-tion occurs in early spring in areas where snowfall is fairly light, it is delayed until May or June in the deep snow-covered district. Its sporophyte develops in warmer seasons and matures before snowfall, and spore disper-sal occurs in May of the following year. Although it takes only 6 months for sporophyte maturation during snow-free seasons, the moss usually needs a value for Kira’s warmth index of 35.1 or more for sexual reproduction. Therefore, the sporophyte distribution may be inhibited by the lower air temperature during its growing seasons in the alpine zone. Growth appears to be restricted to the areas, in which potential evapotranspiration of 130― 190 mm in August. The moss may be more sensitive to a drier climate than higher air temperature, because its vegetative growth is well adapted to a wide range of air temperatures. As the moss requires higher air humidity and strong sunlight at open sites, it may be excluded from the coastal lowlands and the midwestern area of the prefecture, which show higher evapotranspiration in summer than at higher elevations.},
 pages = {1--12},
 title = {Relationships amongdistribution, climatic conditions and phenology of the moss Pogonatum urnigerum in Niigata Prefecture and adjacent regions},
 volume = {51},
 year = {2003}
}