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Animal pollination in a warm temperate evergreen broad‐leaved forest was observed on Yaku‐shima Island, south of Kyushu, Japan. Three groups of plants were categorized: canopy‐flowering tree species, understory‐flowering tree species, and climber and epiphyte species. Each of these formed...
The relationship between nitrification potential and nitrogen accumulation was studied in an early successional sere on Mt. Fuji. Soil organic nitrogen accumulated with the invasion of Polygonum cuspidatum and successively with Miscanthus oligostachyus and other species. Laboratory incubation...
Seasonal changes in abundance and distribution pattern of soil micro‐arthropods were studied in connection with a few environmental factors in a Japanese cedar (Cryptomeria japonicaD. Don) plantation. The soil arthropods were sampled from three different depths at intervals of two months for two...
Fifteen previously proposed similarity indices are examined for the effects of sample size and/or group size (the number of samples included in a cluster). The three indices of Cλ, NESS, and C′λ are free from effects, but the former two are unsuitable for arithmetic averaging unless all of the...
A survey of springtails was conducted in 1984 on Volcano Usu which suffered damage to it's ecosystem from eruptions in 1977 and 1978. The summit area, almost completely deforested by the eruptions, was still inhabited by many forest species such as Desoria notabilis, Willowsia sp. 2,...
The adaptive significance of egg size of skippers (Lepidoptera; Hesperiidae) in Japan was evaluated in relation to the leaf toughness of their major host grasses. The hesperids that fed on tougher grasses laid larger eggs. Hesperids that laid larger eggs were larger in body size, but lower in...
Seed hoarding behavior of the red squirrel, Sciurus vulgaris, was studied in relation to the amount of dispersed seeds of the Korean pine, Pinus koraiensis, and the distribution of its seedlings. After removing a cone from a tree, squirrels sat on the ground and ripped off its cone scales before...
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