Ecological Effects of Water-Level Fluctuations in Lakes

Wantzen, Karl M.; Rothhaupt, Karl‐Otto; Mörtl, Martin; Cantonati, Marco; Tóth, László; Fischer, Philipp

doi:10.1007/978-1-4020-9192-6

Cited by 29 publications

(1 citation statement)

References 282 publications

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“…Furthermore, aquatic macrophytes have the physiological potential to remediate heavy metals from polluted water bodies thereby regarded as the corner stone of aquatic environments (Chukwuka and Uka, 2007). Changes in physicochemical parameters can affect the growth and distribution of submerged macrophytes and other macrophytes (Strand and Weisner, 2001), and the structure of communities (Wantzen et al, 2008). For example, the reported effects of water depth on the growth of the submerged species Myriophyllum spicatum https://scientifica.umyu.edu.ng/ Magami & Sanyinna, /USci, 3(1): 015 -028, March 2024 (Strand and Weisner, 2001;Zhu et al, 2012;Zhu et al, 2015), Potamogeton pectinatus (Bucak et al, 2012), Potamogeton maackianus and Potamogeton malaianus (Zhu et al, 2012;Zhu et al, 2015), and on the community composition of submerged macrophytes (Dong et al, 2014) demonstrate that water depth plays a vital role in aquatic ecosystems.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Surface Water Physicochemical Variables and Macrophytes Diversity in Sokoto and Rima Rivers, Nigeria

Magami,

Sanyinna

2024

USci

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The Sokoto and Rima Rivers are vital water bodies in Nigeria, supporting local ecosystems and communities. This study aimed to investigate various physical and chemical parameters of the water, as well as the diversity of macrophytes present in the Sokoto and Rima Rivers. Standard methods of determining physicochemical parameters and surveys of macrophytes were adopted. Results obtained revealed that temperature and depth were found to be the most influential factors on macrophytes distribution. In Sokoto River, average temperature ranged from 27.00℃ to 27.30℃, and average depth from 285 to 295 meters at both stations A and B. In Rima River, average temperature varied from 25.85℃ to 26.50℃, and average depth ranged from 730 to 735 meters at both stations A and B. Emergent species were dominant among the 20 identified macrophyte species, with 18 species, while free-floating and submerged species each represented one species. This research contributes to understanding the ecological health of the Sokoto and Rima Rivers, guiding conservation efforts, informing water resource management, and identifying potential impacts on human activities in these areas. Ultimately, the goal is to support sustainable development and protect these valuable natural resources for the long term.

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Section: Introductionmentioning

confidence: 99%

Assessment of Surface Water Physicochemical Variables and Macrophytes Diversity in Sokoto and Rima Rivers, Nigeria

Magami,

Sanyinna

2024

USci

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Fisheries and water level fluctuations in the world's largest desert lake

et al. 2016

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Hydrological regimes are significant drivers of fisheries production in many African Lakes due to their influence on fish habitat and food availability, breeding success, and catchability. Lake Turkana, Kenya, will undergo substantial changes in hydrology due to water regulation and extraction along the Omo River in neighboring Ethiopia, which provides over 90% of its water. The objective of this study was to predict how the lake's fisheries, which provide an important livelihood and protein source in the region, will respond to hydrological change. While variations in fishing effort are poor predictors of fisheries catch in the lake, water levels and their fluctuations strongly influence fisheries production. Seasonal oscillations play a particularly important role, and with complete loss of these oscillations, the lake's predicted fisheries yield will decrease by over two thirds. The fishery is predicted to collapse at a lake level decline of 25 m, regardless of seasonal amplitude magnitude. The lake's total littoral habitat, where fisheries are currently concentrated, will increase in surface area with lake level declines of <25 m. However, the extent of productive, dynamic littoral habitat will decrease with dampening of the lake's seasonal oscillations. The most severe habitat loss will occur in the lake's Turkwel Sector, which hosts the region's highest human population densities, and North Sector, where inter‐tribal conflict over resources is common and likely to be exacerbated by lake level decline. The continued ecological functioning of Lake Turkana necessitates immediate efforts to develop and apply a water resource management plan rooted in science.

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