Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.1002/eco.2171 |
| Water-isotope ecohydrology of Mount Kilimanjaro | |
| Bode, Samuel1; De Wispelaere, Lien1; Hemp, Andreas2; Verschuren, Dirk3; Boeckx, Pascal1 | |
| 通讯作者 | Bode, Samuel |
| 来源期刊 | ECOHYDROLOGY
 |
| ISSN | 1936-0584 |
| EISSN | 1936-0592 |
| 出版年 | 2020 |
| 卷号 | 13期号:1 |
| 英文摘要 | Notwithstanding its crucial importance for assessing the vulnerability of tropical mountain ecosystems to both local anthropogenic pressure and climate change, knowledge of the relationships between climate, hydrology, and vegetation on Mount Kilimanjaro is highly fragmentary. Unraveling the pathway of water from precipitation to transpiration can also help validate paleoclimate proxies derived from the hydrogen- and oxygen-isotopic signatures of plant compounds, such as leaf waxes. We measured delta H-2 and delta O-18 in precipitation, stream, and soil water, and in xylem and leaf water of locally common plants, for four successive seasons along a 3,000-m altitudinal transect covering lowland savannah, lower and upper montane forest, and the subalpine zone on Mount Kilimanjaro. Across all four bioclimatic zones, delta H-2 and delta O-18 in precipitation decreased with monthly precipitation amount at a rate of -8 +/- 2 parts per thousand and -1.0 +/- 0.3 parts per thousand per 100 mm, respectively. Our xylem-water isotope data indicate that plants in general took up topsoil water during the northeasterly monsoon season and short dry season and gradually shifted to deeper soil water during the southeasterly monsoon season and the main dry season. Savannah trees and shrubs tapped from a water pool recharged by source water with a relatively constant isotopic signature. This observation conforms to the two water worlds hypothesis and implies a possible seasonal bias in plant-derived paleohydrological proxies. Finally, our results show strong correlation between xylem-to-leaf water-isotopic enrichment and ambient relative humidity, despite a bias in the savannah that we attribute to a leaf-cooling mechanism in this warm, semi-arid environment. |
| 英文关键词 | East Africa hydrogen-isotope fractionation isotope paleorecords Mount Kilimanjaro paleohydrological proxy precipitation water-isotope ecohydrology |
| 类型 | Article |
| 语种 | 英语 |
| 国家 | Belgium ; Germany |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:000496754500001 |
| WOS关键词 | SOIL-WATER ; HYDROGEN ISOTOPES ; DEUTERIUM EXCESS ; STABLE-ISOTOPES ; SOUTHERN SLOPES ; MT. KILIMANJARO ; TROPICAL FOREST ; CLIMATE-CHANGE ; RAIN-FOREST ; LEAF WATER |
| WOS类目 | Ecology ; Environmental Sciences ; Water Resources |
| WOS研究方向 | Environmental Sciences & Ecology ; Water Resources |
| EI主题词 | 2019-11-17 |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/310909 |
| 作者单位 | 1.Univ Ghent, Isotope Biosci Lab ISOFYS, Dept Green Chem & Technol, Ghent, Belgium; 2.Univ Bayreuth, Dept Plant Systemat, Bayreuth, Germany; 3.Univ Ghent, Dept Biol, Limnol Unit, Ghent, Belgium |
| 推荐引用方式 GB/T 7714 | Bode, Samuel,De Wispelaere, Lien,Hemp, Andreas,et al. Water-isotope ecohydrology of Mount Kilimanjaro[J],2020,13(1). |
| APA | Bode, Samuel,De Wispelaere, Lien,Hemp, Andreas,Verschuren, Dirk,&Boeckx, Pascal.(2020).Water-isotope ecohydrology of Mount Kilimanjaro.ECOHYDROLOGY,13(1). |
| MLA | Bode, Samuel,et al."Water-isotope ecohydrology of Mount Kilimanjaro".ECOHYDROLOGY 13.1(2020). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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