Geological History and Present Conditions of Lake Balkhash

Sala, Renato; Deom, Jean-Marc; Аладин, Н. В.; Плотников, И. С.; Nurtazin, Sabyr

doi:10.1007/978-3-030-42254-7_5

Cited by 11 publications

(11 citation statements)

References 18 publications

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“…Flow regulation in the lower reaches of the Ili River after the Kapchagay reservoir dam construction, high water pollution with organic and heavy metals, overfishing and poaching impact on ecosystem of the western Balkhash have long history. This was recently traced in several publications that reported escalation of negative loading on the ecosystem (Graham et al, 2017;Krupa et al, 2020;Mischke et al, 2020;Pueppke et al, 2018;Sala et al, 2020).…”

Section: Discussionmentioning

confidence: 91%

“…Therefore, the western part of lake is the main place of commercial fish reproduction (Imentai et al, 2015). The increase in population density and the lack of effective environmental control led to dangerous pollution of the aquatic environment (Krupa et al, 2020;Mischke et al, 2020;Sala et al, 2020) and poaching on a large scale (Graham et al, 2017;Pueppke et al, 2018). Recent data about the human impact on the fish fauna are very limited and the status and dynamics of fish populations are not well known (Imentai et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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New data on diversity and distribution of fish in shallow waters in western Lake Balkhash (Kazakhstan)

et al. 2022

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Lake Balkhash is one of the largest lakes of Asia and belongs to the Republic of Kazakhstan. The lake has suffered from alien fish introduction, water pollution and overfishing during last decades. The goal of this study was to investigate contemporary fish diversity in shallow waters in western part of the Lake Balkhash. Fish samples were collected there 2018 and 2019. The data obtained showed changes in fish species diversity and significant decrease in the proportion of juvenile commercial fish in shallow sites of western part of the lake. The distribution of species seems random and needs further study to elucidate key factors. Thus, our data indicated deterioration of shallow waters in the western Balkhash as "nursery" for commercial fish species.

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Section: Discussionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

New data on diversity and distribution of fish in shallow waters in western Lake Balkhash (Kazakhstan)

et al. 2022

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“…The substitution of the native fish fauna by introduced species caused a decrease in valuable commercial fish in the lake and a decrease in the total fish catch. Thus, Lake Balkhash faces serious environmental risks today and its near future depends on the collective will and decisions of the responsible agencies 17) .…”

Section: Literature Reviewmentioning

confidence: 99%

Analysis of Changes in the Ecological Space of the Ili River Delta (due to Reduced Flow of the Ili River)

Moldakhanova¹,

Alimkulov²,

Smagulov³

2023

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The construction of the Kapchagay Reservoir led to the withdrawal of a portion of the water from the river, which reduced the water flow, the situation has gradually been resolved, but the water level in the lake and the flow still need to be monitored. The purpose of the study was to investigate trends in the characteristics showing the state of the ecosystem. A more detailed analysis of changes in meteorological conditions observed in the region according to weather stations revealed significant changes in the water regime and average annual flow of the river. These indicators were obtained at special weather and hydrological stations located along the riverbed and the surrounding area. Climatic changes and anthropogenic factors have had some impact on the flow rate. Rising temperatures and rainfall have affected the glaciers of the Tien Shan Mountain system, increasing the amount of water in the Ili River. At the same time, water intake for agricultural needs had no noticeable effect. Changes in the flow rate are directly related to the biocenosis of the region. The area outlying the river and lake and the delta may become arid due to declining water levels. In this case, the space next to the water will be used more actively. For this reason, it is very important to monitor changes in the flow, as the entire ecosystem depends on the water level. The construction of the Kapchagay Reservoir has certainly had some impact on the water level of the lake and the volume of water flowing into the river, but at this point, the effect of the reservoir has been overridden by the sensitivity of the glaciers. At this point, it is impossible to predict exactly how the situation will unfold, but it is recommended to pay close attention to it.

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“…The most detrimental environmental impacts appear in the form of degradation induced by intensive irrigation agriculture (An et al, 2012;Mischke et al, 2017) in ecologically unsuitable regions. This degradation of larger lake systems may be comparable to the withdrawal of water from Lake Balkhash tributaries in southeast Kazakhstan since the 19th century, which has had an impact on lake levels (Chiba et al, 2016;Mischke et al, 2020;Sala et al, 2020) where increased water consumption is correlated with urbanization in the region. The environmental impacts of urban expansion in more mountainous regions during the early historic and Medieval periods present an important area for future investigation (Maksudov et al, 2019).…”

Section: Forest Use and Mining?mentioning

confidence: 99%

Reviewing the Palaeoenvironmental Record to Better Understand Long-Term Human-Environment Interaction in Inner Asia During the Late Holocene

2022

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The Middle to Late Holocene spread of agropastoralism throughout Eurasia not only subjected domesticated taxa to stressors associated with novel environments but also induced changes in these environments following the introduction of these social-ecological systems. The mountainous region of Inner Asia comprises various steppe, meadow, and forest landscapes where zooarchaeological evidence suggests occupation by herding populations as early as 7,000 years Before Present (BP). Recent archaeobotanical findings indicate the introduction of cropping and the development of agropastoralism around 4,500 BP. Here, we review and synthesize palaeoenvironmental studies and data to examine anthropogenic impacts and modifications of these landscapes. From around 4,000 BP, we find significant changes in palynomorph, charcoal, sediment, and other proxy data, related to the introduction of agriculture to the region, with later intensifications in land use indicators at around 2,000 and 1,000 BP. We note that these impacts are not uniform or continuous through and across the records and may be evidence of shifting phases of occupation and landscape management. This temporal and spatial variability may also be a response to shifts in moisture availability due to long-term Holocene changes in the intensity of the summer monsoon and Westerly circulation systems. Changes in arboreal pollen indicate the development of intensified use of forest resources in the region, which we identify as a topic for future investigation. Based on these data, we stress the long-term human paleoecology in the study area and argue that traditional agropastoralist systems should be considered in future programs of landscape conservation in the region. This study also emphasizes the importance of future local scale multiproxy studies into past anthropogenic changes within the Inner Asian landscape.

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Geological History and Present Conditions of Lake Balkhash

Cited by 11 publications

References 18 publications

New data on diversity and distribution of fish in shallow waters in western Lake Balkhash (Kazakhstan)

New data on diversity and distribution of fish in shallow waters in western Lake Balkhash (Kazakhstan)

Analysis of Changes in the Ecological Space of the Ili River Delta (due to Reduced Flow of the Ili River)

Reviewing the Palaeoenvironmental Record to Better Understand Long-Term Human-Environment Interaction in Inner Asia During the Late Holocene

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