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ムラナカ タカシ
TAKASHI MURANAKA
村中 孝司 所属 地球環境科学部 環境システム学科 職種 教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2007/07 |
| 形態種別 | 学術雑誌 |
| 査読 | 査読あり |
| 標題 | Seed deposition of Eragrostis curvula, an invasive alien plant on a river floodplain |
| 執筆形態 | 共著 |
| 掲載誌名 | ECOLOGICAL RESEARCH |
| 掲載区分 | 国外 |
| 出版社・発行元 | SPRINGER TOKYO |
| 巻・号・頁 | 22(4),pp.696-701 |
| 著者・共著者 | Naoki Nakayama,Jun Nishihiro,Yuichi Kayaba,Takashi Muranaka,Izumi Washitani |
| 概要 | To test the hypothesis that nonbuoyant seeds transported by river water are deposited with mineral sediment particles that have a similar fall velocity through water, we examined the relationship between the size of sediment deposited by a flood and the density of the deposited seeds of a invasive alien plant, Eragrostis curvula. The average estimated fall velocity of the seeds was 2.93 cm/s, and this value was similar to the fall velocity through water of fine sand (about 0.18 mm in size). Most seeds deposited by a flood pulse caused by a typhoon were observed in sites where fine sand and silt had accumulated on the surface. Over the course of two study years, the number of the seeds found in sediment deposited at microsites correlated significantly with the proportion of sediment particles < 0.25 mm in size. Our results suggest that floodplain areas where fine sand is deposited by floods have a high risk of invasion by E. curvula. |
| DOI | 10.1007/s11284-006-0047-3 |
| ISSN | 0912-3814/1440-1703 |
| NAID | 10019529076 |