博茨瓦纳奥卡万戈三角洲湖沼学研究综述

IF 1.1 4区 环境科学与生态学 Q3 MARINE & FRESHWATER BIOLOGY
M. Gondwe, Michael Murray-Hudson, N. Mazrui, O. Moses, E. Mosimanyana, O. Mogobe
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引用次数: 3

摘要

水量和水质是包括湿地在内的水生生态系统管理的重要方面。本文综合了有关博茨瓦纳奥卡万戈三角洲湖沼学的现有文献。流入水中目前接近自然的溶质浓度可归因于石英盆地基底的低化学风化和奥卡万戈三角洲内几乎没有人为营养源。内源生态系统中溶质的富集是一种自然现象。在奥卡万戈三角洲,由于常青树的蒸发作用,大量树木岛下地下水中溶质的积累抵消了这种浓度。淡水环境在半干旱环境中培养了丰富多样的动植物。然而,出于管理目的,奥卡万戈三角洲有几个方面需要更严格的研究。一些重要的知识空白包括大气沉积和动物排泄作为营养物质和微量元素进入系统的来源的作用,以及水文期对微量元素分布的影响,特别是在奥卡万戈三角洲的洪泛平原沉积物、动植物中。微量元素的生物累积问题也是奥卡万戈三角洲的一个重要知识缺口,尤其是对野生动物和人类健康而言。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A review of the limnology of the Okavango Delta, Botswana
Water quantity and quality are important aspects in the management of aquatic ecosystems, including wetlands. This paper has integrated available knowledge from literature on the limnology of the Okavango Delta, Botswana. The current near-natural solute concentrations in the inflow waters can be attributed to low chemical weathering of the quartz basin substrate and nearly absent anthropogenic nutrient sources within the Okavango Delta. The concentration of solutes in endorheic ecosystems is a natural phenomenon. In the Okavango Delta, this concentration is offset by the accumulation of solutes in groundwater beneath numerous treed-islands, due to evapotranspiration by evergreen trees. The freshwater environment has fostered high abundance and diversity of flora and fauna in a semi-arid environment. However, there are several aspects of the Okavango Delta that need more rigorous researched for management purposes. Some of the important knowledge gaps include the role of atmospheric deposition and animal excretion as sources of nutrients and trace elements into the system, and the influence of hydro-period on the distribution of trace elements especially in floodplain sediments, flora and fauna across the Okavango Delta. The issue of bioaccumulation of trace elements is also an important knowledge gap for the Okavango Delta particularly for wildlife and human health.
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来源期刊
African Journal of Aquatic Science
African Journal of Aquatic Science MARINE & FRESHWATER BIOLOGY-
CiteScore
3.90
自引率
7.10%
发文量
31
审稿时长
>12 weeks
期刊介绍: The African Journal of Aquatic Science is an international journal devoted to the study of the aquatic sciences, covering all African inland and estuarine waters. The Journal publishes peer-reviewed original scientific papers and short articles in all the aquatic science fields including limnology, hydrobiology, ecology, conservation, biomonitoring, management, water quality, ecotoxicology, biological interactions, physical properties and human impacts on African aquatic systems.
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