Water level fluctuations in Lake Baringo, Kenya, during the 19th and 20th centuries: Evidence from lake sediments
| العنوان: | Water level fluctuations in Lake Baringo, Kenya, during the 19th and 20th centuries: Evidence from lake sediments |
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| المؤلفون: | Nzula Kitaka, Dirk Verschuren, EO Okech, S Omondi |
| المصدر: | African Journal of Aquatic Science; Vol 44, No 1 (2019); 25–33 |
| بيانات النشر: | NISC, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | 0106 biological sciences, Oceanography, climatic variations, fossil diatoms, P/B ratio, 200 year record, 010604 marine biology & hydrobiology, Environmental science, 010501 environmental sciences, Aquatic Science, 01 natural sciences, Ecology, Evolution, Behavior and Systematics, 0105 earth and related environmental sciences, Water level |
| الوصف: | This article presents a fossil diatom-based, semi-quantitative reconstruction of water level fluctuations for Lake Baringo over the past 200 years as a consequence of climatic variations. A 285 cm long sediment core sample was collected using a Rod-Operated Single-drive Stationary Piston corer. Lake level was inferred using indices based on the proportion of planktonic to benthic diatom taxa (P/B ratio). The sediment archive presented distinct zones dominated by planktonic and benthic diatom flora. An initial transgression in the early 19th century was characterised as a shallow water environment dominated by planktonic Aulacoseira spp. This was a response to extreme drought during the late 18th to early 19th century. Mid-19th century was defined by a high lake stand. The late 19th to early 20th centuries experienced low water level following the widely documented aridity at the time. The mid-20th century was marked by a spectacular rise in water level that coincided with remarkably wet years during the early 1960s and late 1970s. The first decade of the 21st century witnessed widespread changes in water level. The proxy records show that lake ramping and drawdown over the years follow approximately 50-year climatic cycles.Keywords: climatic variations, fossil diatoms, P/B ratio, 200 year record |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1608-5914 1727-9364 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f850c2ba7f273ae1489ef4d722180a78 https://www.ajol.info/index.php/ajas/article/view/186619 |
| رقم الانضمام: | edsair.doi.dedup.....f850c2ba7f273ae1489ef4d722180a78 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 16085914 17279364 |
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