著者

河野 修一 江崎 次夫 原 浩之 村上 博光 木原 辰之 中山 累 寺本 行芳 金 錫宇 全 槿雨 松本 淳一 土居 幹治 村上 尚哉

出版者

日本緑化工学会

雑誌

日本緑化工学会誌 (ISSN:09167439)

巻号頁・発行日

vol.46, no.1, pp.119-122, 2020-08-31 (Released:2020-12-25)

参考文献数

4

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集中豪雨で山腹斜面が崩壊した跡地に施工された筋工の平坦部に3年生のヒノキを植栽する際に,活着率の向上とその後の旺盛な成長を期待して,植え穴に「くらげチップ」約100 gを施した。10年後の施用区の樹高は722 cm,根元直径は112.2 mmあった。これに対し,無施用区のそれらは,それぞれ547 cm,84.8 mmであった。施用区と無施用区との間に枯損率,樹高および根元直径共に,0.1%レベルの有意差が認められた。このような相違が認められたのは,土壌改良材の持つ水分保持能力と分解後の栄養分が効果的に作用したことによるものと判断された。しかし,樹高と根元直径の伸長率は10年目で,ほぼ0に近い値となり,その効果の持続期間は10年程度と考えられた。

著者

佐々木 理 岩下 智洋 木元 克典 鹿納 晴尚 木原 辰之

出版者

日本古生物学会

雑誌

化石 (ISSN:00229202)

巻号頁・発行日

vol.99, pp.63-72, 2016-03-31 (Released:2019-04-03)

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The planktonic foraminifera are distributed across the world’s oceans, of which the shells are preserved in the ocean sediments, forming one of the most complete fossil records on earth. The record is used to date sedimentary rocks and study evolutionary processes, and is one of the most important archives of the past ocean condition. The appearing micron resolution X-ray CT (MXCT) can bring new information into the micropaleontology by the innovating data acquisition, visualization, measuring, morphometry, modeling and data shearing of foraminifera specimens. Anthropogenic CO2 changes the carbonate chemistry and the pH of the surface ocean. The ecological effects of the change are largely unknown and need to be quantified. The quantitative CT method with MXCT has become possible to measure the mineral density and visualize the density distribution in the micron-scale shell of foraminifera. The application to the living and fossil foraminifera might provide novel information about the ocean acidification ongoing in the modern ocean and occurred in the past one. The advent of molecular biological techniques has led to the discovery of previously unrecognized genetic diversity of the modern species recognized based upon the shell morphology. However, until recently the best information on shell shape was only obtained through SEM images, giving limited measuring accuracy of 3D shell shape. The reverse technology with MXCT has upgraded the morphometry of this group by shifting the data from SEM images to CT data. The famous models made by 19th Century paleontologist d’Orbigny shows clearly that it has been difficult to shear the morphological information of specimens because of its micron size. Instead of such handcrafted models, the Internet delivery of the virtual model generated from MXCT images has become possible to shear the high-precise morphological data of taxonomic type specimen. The applications here illustrate the possibilities of computational micropaleontology, which has established in a new interdisciplinary field between the state-of-the-art three-dimensional imaging technology and the biogeoscience.