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Use of mires and food habits of sika deer in the Oze Area, central Japan

机译:日本中部Oze地区梅花鹿泥沼的使用和饮食习惯

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摘要

Sika deer Cervus nippon entered the Oze Area, a snowy area in central Japan, in the 1990s. The use of mires and the food habits of this species were studied in 1999 and 2000. Deer used the mires immediately after snow melted and did not use the mires in mid summer, although they did use them lightly in autumn. The summer food habits differed from those of the deer population living in Nikko in the lower area: non-Sasa graminoids and other monocotyledonous leaves occupied more (approximately 30%) of the feces in the former population, whereas Sasa nipponica, a dwarf bamboo, was the dominant food (60%) of the latter population. Seasonal changes in fecal composition in the Oze deer were that mire graminoids occupied a considerable portion of their food in spring (11.6%) and summer (17.0%), whereas the amount of dwarf bamboo increased in fall (26.0%). Despite the small size of the mires, Oze deer appear to prefer mires to forests. Nitrogen concentrations of the mire plants did not differ from those of the forest plants; however, foraging efficiency would be greater in the mires and this may explain the preference observed. Despite the small total biomass, leaf biomass of the mire was equivalent to that of the adjacent forest floor. In addition, biomass was concentrated near the ground, or the 'biomass concentration' was greater than that of the forest floor.
机译:1990年代,Sika deer Cervus nippon进入了日本中部白雪皑皑的Oze地区。在1999年和2000年对泥沼的使用和该物种的饮食习惯进行了研究。鹿在雪融化后立即使用泥沼,并且在夏季中期不使用泥沼,尽管秋天使用的泥沼很少。夏季的饮食习惯与居住在较低地区日光市的鹿种群不同:非莎莎草类和其他单子叶植物在前者的粪便中占更多(约30%),而矮竹竹(Sasa nipponica),是后者的主要食物(占60%)。 Oze鹿粪便成分的季节性变化是泥泞的类蠕虫在春季(11.6%)和夏季(17.0%)占据了其食物的相当一部分,而矮竹的数量在秋季(26.0%)增加了。尽管沼泽面积很小,但Oze鹿似乎比森林更喜欢沼泽。泥潭植物的氮浓度与森林植物的氮浓度没有差异。但是,觅食效率在泥潭中会更高,这可以解释观察到的偏好。尽管总生物量很小,但泥潭的叶片生物量却与相邻的林地相当。此外,生物量集中在地面附近,或者“生物量浓度”大于森林地面的浓度。

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