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A Fundamental Study of Overall Conservation of Terrestrial and Freshwater Ecosystems in a Montane Region of Western Sumatra : Vegetation, Land-use, and Water Quality
http://hdl.handle.net/10232/15694
http://hdl.handle.net/10232/15694f4af241e-816f-4f3e-ab3b-dd8eaf9ee1ad
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
AN00181784_v8-2_p87-124.pdf (19.3 MB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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| 公開日 | 2013-01-22 | |||||
| タイトル | ||||||
| タイトル | A Fundamental Study of Overall Conservation of Terrestrial and Freshwater Ecosystems in a Montane Region of Western Sumatra : Vegetation, Land-use, and Water Quality | |||||
| 言語 | en | |||||
| 著者 |
中野, 和敬
× 中野, 和敬× 渡辺, 仁治× USMAN, Rustam× Syahbuddin |
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| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | Conservation | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | Vegetation | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | Land-use | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | Water quality | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | Sumatra | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | departmental bulletin paper | |||||
| 要約(Abstract) | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | For a fundamental study of nature conservation in a region with the headwaters of big rivers in the humid tropics, surveys of vegetation, land-use, and water quality were made around the relatively small lakes of Diatas, Dibaruh, and Talang, in the volcanic highlands of the Province of West Sumatra. Owing partly to the relatively high population density, the area of the natural forests, most of which are legally protected, has decreased to less than one-third of the total area of the terrestrial parts of the catchment basins. Much more than half of the terrestrial area of the basins of both Lake Diatas and Lake Dibaruh is classified as actually cultivated or abandoned upland fields plus residential districts. Most abandoned fields, whose area is far more than that of actually cultivated ones, are covered dominantly by bracken (Pteridium aquilinum). The application of chemical fertilizers has become a normal process during the cultivation in both the upland and wet paddy fields. |
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| 言語 | en | |||||
| 要約(Abstract) | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | The evaluation of the water quality in the lakes using a biological index based on diatom assemblage as well as the results of the measurements of transparency and the standing crops of phytoplankton led to a conclusion that neither Lake Diatas nor Lake Dibaruh were eutrophicated as a whole. Some symptoms of eutrophication, however, were also, at least, partially confirmed by means of the values of the index. The results of the analyses of chemical factors and plankton flora there correspond with those symptoms and can be explicated without contradiction when we take other physical factors of the water of the lakes and their inflows into consideration. In addition, the water quality of Lake Dibaruh, which is mostly encircled by very steep slopes, is worse than that of Lake Diatas despite more favorable conditions of the former in regard to the factors of the load of pollutants and lake depth. The above-mentioned phenomena suggest that the eutrophication in both Lake Diatas and Lake Dibaruh is closely connected with the severity of the erosion of surface soil and runoff which contain the nutrients derived from chemical fertilizers. Therefore, the restoration of natural forests in the abandoned fields is necessary to abate the soil erosion and the runoff around the two lakes. The results of a quantitative investigation have demonstrated the strong possibility of the natural reversion of the vegetation in those abandoned fields to the forest stage if no fires occur there. |
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| 言語 | en | |||||
| 収録雑誌名 |
ja : 南海研紀要 en : Memoirs of the Kagoshima University Research Center for the South Pacific 巻 8, 号 2, p. 87-124, 発行日 1988-02-29 |
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| 作成日 | ||||||
| 日付 | 1988-02-29 | |||||
| 日付タイプ | Issued | |||||
| ISSN | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 03895351 | |||||
| NII書誌ID（雑誌） | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AN00181784 | |||||
| 出版タイプ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| NDC | ||||||
| 主題Scheme | NDC | |||||
| 主題 | 450 | |||||
| 公開者・出版者 | ||||||
| 出版者 | 鹿児島大学 | |||||
| 言語 | ja | |||||
| 公開者・出版者 | ||||||
| 出版者 | Kagoshima University | |||||
| 言語 | en | |||||
