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Article

Past, Current and Future of Fish Diversity in the Alakol Lakes (Central Asia: Kazakhstan)

by
Nadir Mamilov
1,*,
Sayat Sharakhmetov
1,2,
Fariza Amirbekova
3,
Dinara Bekkozhayeva
4,
Nazym Sapargaliyeva
1,
Gulnar Kegenova
1,
Ainur Tanybayeva
1 and
Kanatbek Abilkasimov
5
1
Department of Biodiversity and Bioresources, Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Al-Farabi Av., 71, Almaty 050040, Kazakhstan
2
Institute of Genetics and Physiology, Almaty 050060, Kazakhstan
3
LLP Fisheries Research and Production Center (FRPC), Almaty 050016, Kazakhstan
4
Laboratory of Signal and Image Processing, Institute of Complex Systems, Faculty of Fisheries and Protection of Waters, CENAKVA, University of South Bohemia in Ceske Budejovice, Zámek 136, 373 33 Nové Hrady, Czech Republic
5
Alakol State Nature Reserve, Kabanbay Batyr Street 32, Usharal 040200, Kazakhstan
*
Author to whom correspondence should be addressed.
Diversity 2022, 14(1), 11; https://doi.org/10.3390/d14010011
Submission received: 15 October 2021 / Revised: 19 December 2021 / Accepted: 22 December 2021 / Published: 26 December 2021
(This article belongs to the Special Issue Aquatic Biodiversity: Evolution, Taxonomy and Conservation)
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Abstract

:
The aboriginal ichthyofauna of the Balkhash basin consists mainly of endemic fish species. By the end of the last century, indigenous fish species were driven out of Lake Balkhash and the Alakol Lakes remain the largest refuges of aboriginal fish fauna. Knowledge of regularities of the modern distribution of the indigenous fishes is crucial for biodiversity conservation as well as restoring aquatic ecosystems. The modern diversity of fish species was investigated there in this study. Significant changes for the indigenous and some alien fish distributions were revealed in contrast with earlier known data. Canonical correspondence analysis (CCA) was used to study the relationships between habitat characteristics and species abundance. Water mineralization and maximal observed water temperatures were estimated as the main environmental variables in fish distribution at the local scale. Habitat change leads to fish fauna homogenization as a result of rare species extinction and alien penetration. Growing human population and poor water management make the future of the indigenous fishes unpredictable.

1. Introduction

Human well-being depends on healthy natural ecosystems supported by specific features and functions of every included species [1,2]. Freshwater is a vital resource for each living organism. The maintenance of the health and resilience of natural freshwater ecosystems is vital for human prosperity. The growing human population has made conservation of freshwater fishes an acute problem around the world [3,4,5,6]. The modern alarming speed at which species disappear has been called the planet’s sixth mass extinction [7,8]. An analysis of the extinction rate of freshwater fishes in the USA and Europe revealed that in the last century, this was about 112 times higher than expected under natural conditions [9]. Current efforts are clearly insufficient to halt the rapid extinction of species [10,11].
Central Asia is a world region with a lack of freshwater resources. Despite the great importance of fish for maintaining the sustainable functioning of aquatic ecosystems and as a food resource, international knowledge of the fish diversity of Central Asia remains unsatisfactory [10,12]. The Balkhash basin is one of the largest oases located in the center of Asia. Paleogeographic and paleoecological processes isolated it from other water systems at least 10,000 years ago. For this reason, the native fish fauna consists of several species and is characterized by a high degree of endemism [13,14]. The naked osman Gymnodiptychus dybowskii (Kessler, 1874), Eurasian minnow Phoxinus phoxinus (Linnaeus, 1758), spotted thicklip loach Triplophysa strauchii (Kessler, 1874), Tibetan stone loach Triplophysa stoliczkai (Steindachner, 1866) and grey loach Triplophysa dorsalis (Kessler, 1872) are widespread fish species. Others such as Balkhash marinka Schizothorax argentatus Kessler, 1874, Seven River’s minnow Ph. brachyurus Berg, 1912, Balkhash minnow Rhynchocypris poljakowii (Kessler, 1879), plain loach T. labiata (Kessler, 1874), Severtzov’s stone loach T. sewerzowi (Nikolskii, 1938), and the Balkhash perch Perca schrenkii Kessler, 1874 are endemic to the basin.
The Alakol Lakes System is located to the east of the Balkhash Basin. Approximately 600 years ago, as a result of climate change, this system of lakes separated from Lake Balkhash, and since then the natural exchange of fish species between Lake Balkhash and Alakol lakes has been impossible [13]. Alakol Lakes system consists of four lakes with rivers flowing into them and a large area of surrounded wetlands (Table 1). As a result, it is an important place for waterbird conservation [15].
Commercial fishing has used Balkhash marinka, Balkhash perch and spotted thicklip loach. The maximum catch of the Balkhash marinka in the lakes of the Alakol system exceeded 300 tons per year, and of the Balkhash perch—more than 1000 tons per year [17,18]. Despite the fact that Balkhash perch and marinka were highly valued for their taste, some top managers of the fish industry assessed the fish products of the Balkhash and Alakol basins in the middle of the last century as unsatisfactory. As a result, it was decided to replace the native fish species with commercially more valuable ones. In the 1950s–1980s, more than 26 fish species from the basins of the Caspian, Aral, Kamchatka, China and North America were introduced into the basin [19,20]. As a result, aboriginal fish species disappeared from Lake Balkhash and all its large tributaries [20,21,22,23]). Many alien species of fish were also introduced into the basin of the Alakol lakes; however, until the beginning of the 21st century, the aboriginal ichthyofauna was preserved [17,24]. Poor water and fishery management are great problems for the region.
The modern states of population of indigenous Balkhash marinka Schizothorax argentatus, Seven river’s minnow Phoxinus brachyurus, plain loach Triplophysa labiata and Sewertzov’s loach T. sewerzowii were listed as vulnerable (VU) in the Red List of threatened species of International Union for Conservation of Nature (IUCN) [25,26,27,28].
New findings indicate that the number of threats and risk of extinction has no straight correlation and requires more investment in identifying how threats and different ecosystem stressors operate together at local scales [29].
The purpose of the investigation was to study changes in the fish diversity in the past, assess the current state and forecast further changes. According to that, we investigated patterns of fish species distribution in different parts of the basin.

2. Materials and Methods

2.1. Study Area and Sampling

The investigation began in 2014 in the Tentek and Shinzhily rivers, anwas extended to various sites in the basin in 2015–2017 and 2020–2021, in July (Figure 1). According to [30], the ichthyofauna in Lake Sasykkol is represented exclusively by alien species, thus we excluded it from our studies. All types of electrofishing were prohibited in the Republic of Kazakhstan. Therefore, we used a kick net and a landing net for catching fish. This method is not the best, but it allows providing data on the total diversity, dominant species, and relative abundance of fish [31]. The method is traditionally used in Kazakhstan, and makes it possible to compare data obtained for different water bodies and by different researchers [32,33]. Fish sampling was provided according to special permissions of the local fishery authority. Fishing was carried out over an area of about 100 m2 for each location. The rivers were sampled in such a way as to capture the riffle and pool and the total microhabitats system. In the summer, many rivers of the Alakol basin do not reach the delta. Therefore, the main attention was paid to the transfer zone (middle sections, medium gradient) of the rivers since the greatest diversity of ichthyofauna is concentrated there. The coordinates and short designations of the sampling sites are presented in Table 2. A total of 50 sampling events occurred from 20 localities.
Several abiotic parameters of water were studied at each site: color, odor, turbidity, temperature, pH, ammonium and nitrate content. The color and smell were determined using the senses (organoleptic). All mentioned water characteristics were investigated at the sampling places. Water turbidity was determined using a turbo-performance HI 93703 “Hanna Instruments”, salinity, temperature and pH using joint device of the same manufacturer HI 98129, ammonia within HI 96700 ammonia LR, and nitrate with HI 93728.

2.2. Descriptive Statistics

The correlation between the abiotic parameters of water and fish species, as well as the pairwise presence/absence of fish species, was calculated from the correlation matrix using the Spearman coefficient in R computer environment vs. 3.0 [34]. Spearman’s correlation coefficients are considered significant at 0.5 level and 95% confidence level (p ≤ 0.05). We also compared the samples by fish species composition using the principal component analysis (PCA) [35] in the NTSYS program version 2.1 and canonical correspondence analysis (CCA) [36] in the R.

3. Results

The modern diversity of the fish fauna and data of previous years is presented in Table 3. The most widespread and quite numerous are the spotted thicklip loach, naked osman and Balkhash marinka. Seven River’s minnow and Eurasian minnow were encountered once. The Eurasian minnow was found only in the Karakol River and the Seven River’s minnow was observed in the wetland on the east side of the Alakol Lake. The minnows were the dominant species in terms of numbers for both of these sites. There were also found to be some loaches, combining the features of gray and Tibetan stone loaches, and plain loach and Tibetan stone loach. Of the alien species, pike perch was represented only in some commercial and game catches. In high-water years, common bream in the Tentek River penetrated far upstream and had been noted in areas with a rapid current, typical of naked osman, plain loach and Tibetan stone loach.
Figure 2 shows the habitat groupings of various native and alien species. The joint habitation of Balkhash perch and spotted thicklip loach is natural and corresponds to the data of long-term observations [17,24,37,38]. All other groups combine native and alien species.
The relative position of samples from different rivers in the space of the first to third principal components is shown in Figure 3. According to the species composition, the most detached samples of different years were observed in the lower section of the Tentek River and its tributary, as well as samples from the Emel River in 2020 and different estuaries of Lake Alakol.
The greatest loads on the principal component are exerted by the aboriginal Severtsov’s loach, a hybrid of the gray and Tibetan loaches, as well as the alien false gudgeon, bream, white amur bream and medaka. Thus, we did not find any patterns in relation to the origin or ecology of the species.
CCA was used to study possible relationships between five environmental variables (turbidity, temperature, pH, ammonium and nitrate content) and fish abundance in the 47 samples (Table 2, all data are available in supplement). Eigenvalues (lambda) were 0.466, 0.381, 0.197 and 0.116 for the first (horizontal), second (vertical), third and fourth axes, respectively. The first two axes explained 68.1% of the variance and all the canonical axes collectively explained 93.4% of variance. The sites/objects data were linearly related to the sites/variables data by result of permutation test (500 permutations, F = 1.291, P = 0.030). The first axes reflected the distribution of species and sampling sites along with maximal observed water temperature (Figure 4). Along the second axis of variability, sampling sites were ordered by increasing mineralization and concentration of ammonium ions. Results of CCA indicated three patterns in fish distribution according to measured environmental variables (Figure 4). Balkash perch survived in the lake with more salty water. Many alien fish species as topmouth gudgeon, siberian gudgeon, carp, abbottina, white amur bream as well as indigenous Seven River’s minnow and Severtsov’s loach preferred warm water with low mineralization. Other indigenous and alien species kept to rather cool water.
In 2020 and 2021, ammonium ions were detected only in different areas of Lake Alakol (Figure 5) and Lake Sasykkol, nitrate ions in various concentrations were found not only in the Lake Alakol (Figure 6) but also in most rivers (presented in attachments). Compared with the data of previous observations [17], the concentration of ammonium is at the level of 2004, and the content of nitrates has increased markedly.

4. Discussion

Our results showed that all native species still exist in water bodies of the basin of Alakol lakes, but many of the distribution areas significantly shortened in contrast with previously known data [17,18,24]. Earlier, for the rivers of the Balkhash basin, a natural change in fish diversity from source to mouth was established [13]. The upper zone with a swift current was occupied by naked osman and Tibetan stone loach. Below them were added plain thicklip loach, then spotted thicklip loach, after that Balkhash minnow, Balkhash marinka and Balkhash perch. In the lower zone, the proportion of naked osman, Tibetan stone loach, and plain thicklip loach decreased, and the Seven River’s minnow, gray loach, and Severtsov’s loach appeared. In the lakes, the main fish species were Balkhash perch, Balkhash marinka and spotted thicklip loach.
At present, the natural flow of all rivers, with the exception of the Yrgayity River, has been disturbed as a result of the water extraction and construction of dams. This type of human impact on the diversity and status of aquatic organisms is extremely complex, and one of the most common ways of interfering with natural freshwater ecological processes around the world. The stream regulation leads to significant abiotic changes in river ecosystems as changes in the temperature, turbidity, speed of stream, and flow/level regimes [3,4,5,6,39]. In the basin of the Alakol Lakes, this has also led to a violation of habitat conditions.
Balkhash perch disappeared from all rivers. The number of rivers inhabited by gray loach, plain thicklip loach, Eurasian and Seven River’s minnows has decreased.
The Emel River has converted into a hot spot of different alien fish species. The river originates in the territory of the People’s Republic of China, where a reservoir has been built and intensive fish-breeding work is underway, including the introduction of new species of fish. Unlike other studied rivers, alien species dominate here in terms of diversity and abundance. The eightbarbel loach Lefua costata (Kessler, 1876) was found here in 2015, and then the gudgeon Gobio cynocephalus Dybowski, 1869 in 2021. We were surprised to find common bream in cold water as well as Siberian gudgeon in so warm water. The taxonomy of gudgeons inhabiting the water bodies of Kazakhstan needs revision [40]. Therefore, we do not exclude that, upon careful examination, it will turn out to be a different type of gudgeon. Severtsov’s loach and Tibetan stone loach from indigenous fish species have survived in the Emel River.
Only indigenous fish species inhabited the middle and lower sections of the Shagyntogay and Zhamanty rivers about 20 years before [17]. Last year, the sections of both rivers were going to be dry in summertime.
Alien fish species spread in all the lakes and rivers. The problem of replacing native ichthyofauna with alien species is one of the most acute [41,42]. Despite the previously carried out large-scale work on the introduction of new species and transboundary transfer along the Emel River, local fish species remain dominant not only in rivers but also in lakes Alakol and Zhalanashkol. However, their area of distribution is shrinking. Therefore, in not one of the investigated water bodies, have we found the full composition of aboriginal fish species that was described in previous publications [13,17,24,37,38]. Balkhash perch disappeared from rivers, and spotted thicklip loach did not occur in commercial catches in Lake Alakol for the last two years.
We had revealed growth of concentration of nitrogen in the Alakol Lake and presence in different rivers. No statistically reliable correlation between every species distribution and nitrogen concentration was found. In remote water ecosystems, nitrogen comes from agricultural land due to fertilizers, N-fixing crops, animal husbandry, sewage and atmospheric deposition due to the combustion of fossil fuels [43,44]. Nitrogen compounds can lead to freshwater acidification and have far-reaching effects on freshwater ecosystems, and so may be an early alarm on rapid and radical changes in the future [43,45].
Habitat change leads to similarity of fish assemblages in terms of species composition called homogenization of fish fauna in freshwater bodies around the world [41]. At this stage, the homogenization of ichthyofauna in the Alakol basin occurs due to the disappearance of local species, which is not typical for most other water bodies. Rare native species, as shown in Table 3, are still avoiding extinction due to their large numbers in suitable habitats [46]. In the basin of the Alakol lakes, the Eurasian minnow was found only in the Karakol River, the Seven River’s minnow—in the wetland off the eastern coast of Lake Alakol, gray loach—in the Tentek River and the mouth of the Zhamanty River, plain thicklip loach in the Tentek River and its tributary. Severtsov’s loach in some wetlands around Alakol Lake was numerous twice, in 2016 and 2021. The territory of the Alakol nature reserve covers only the mouths of the Tentek and Urzhar rivers and part of the Zhalanshkol lake. This prevents the natural flow of water from being regulated. Previously, fishing was constrained by the poor quality of the roads. In the last decade, recreation areas and agricultural lands began to develop intensively in the basin of the Alakol lakes. Completion of the construction of a high-speed highway is scheduled for 2022. All this will lead to an increase in anthropogenic load.
We have selected a set of measurable and widespread indicators of the negative impact of humans on local fish populations. Of these, only an increase in water temperature in the Emel River clearly favored the existence of many alien species. However, a decrease in living area has been identified, as well as a change in the habitats of many aboriginal species. Generally, our results confirm the new achievement of Greenville et al. [29] that particular combinations of threats are poor predictors of extinction risk on a regional level and effective conservation require a greater push for investment to identify how threats and different ecosystem stressors operate together at local scales.
The current state of aquatic ecosystems is of great concern due to the growing population in this region, poor water and fishery management, and illegal fishery [47,48,49]. Therefore, the future of native fish species seems pessimistic.

Supplementary Materials

The following are available online at https://www.mdpi.com/article/10.3390/d14010011/s1.

Author Contributions

Conceptualization, methodology, investigations, data analysis, original draft preparation, supervision, N.M.; field investigation and data curation S.S., F.A., D.B., N.S. and G.K.; formal analysis and resources, N.M., A.T. and K.A.; visualization, A.T.; project administration, K.A. All authors have read and agreed to the published version of the manuscript.

Funding

Dinara Bekkozhayeva’s participation in the project was supported by the Ministry of Education, Youth and Sports of the Czech Republic—project GAJU 013/2019/Z.

Institutional Review Board Statement

Ethical review and approval were waived for this study due to the low of the Republic of Kazakhstan “On protection, reproduction and use of the animal world” from 9 July 2004 No593-II.

Data Availability Statement

The initial data for the manuscript are included in the supplementary materials.

Acknowledgments

We are grateful to Boris Annenkov, Roman and Arthur Skorovs for their logistic support and help for the field investigations, and staff of the Alakol Nature State Reserve for their consultations and participation in the field investigations. We highly appreciate the time, patience, constructive critics and advice of both the anonymous reviewer and academic editor. The authors thank Robert Gentleman, Ross Ihaka and R Development Core team for the free software.

Conflicts of Interest

We declare that the fish were caught under a survey permit of local state fishery authority and program of research of Alakol Nature State reserve, and absence of any conflict of interest.

References

  1. Hooper, D.U.; Adair, E.C.; Cardinale, B.J.; Byrnes, J.E.K.; Hungate, B.A.; Matulich, K.L.; Gonzalez, A.; Duffy, J.E.; Gamfeldt, L.; O’Connor, M.I. A global synthesis reveals biodiversity loss as a major driver of ecosystem change. Nature 2012, 486, 105–108. [Google Scholar] [CrossRef] [PubMed]
  2. Van Rees, C.B.; Waylen, K.A.; Schmidt-Kloiber, A.; Thackeray, S.J.; Kalinkat, G.; Martens, K.; Domisch, S.; Lillebø, A.I.; Hermoso, V.; Grossart, H.-P.; et al. Safeguarding freshwater life beyond 2020: Recommendations for the new global biodiversity framework from the European experience. Conserv. Lett. 2021, 14, e12771. [Google Scholar] [CrossRef]
  3. Revenga, C.; Campbell, I.; Abell, R.; de Villiers, P.; Bryer, M. Prospects for monitoring freshwater ecosystems towards the 2010 targets. Philos. Trans. R. Soc. B-Biol. Sci. 2005, 360, 397–413. [Google Scholar] [CrossRef] [Green Version]
  4. Dudgeon, D.; Arthington, A.; Gessner, M.; Kawabata, Z.-I.; Knowler, D.; Leveque, C.; Naiman, R.; Prieur-Richard, A.-H.; Soto, D.; Stianssy, M.; et al. Freshwater biodiversity: Importance, threats, status and conservation challengesю Biological Reviews. Camb. Philos. Soc. 2006, 81, 163–182. [Google Scholar] [CrossRef] [PubMed]
  5. Vörösmarty, C.J.; McIntyre, P.B.; Gessner, M.O.; Dudgeon, D.; Prusevich, A.; Green, P.; Glidden, S.; Bunn, S.E.; Sullivan, C.A.; Reidy Liermann, C.; et al. Global threats to human water security and river biodiversity. Nature 2010, 467, 555–561. [Google Scholar] [CrossRef]
  6. Ormerod, S.J.; Dobson, M.; Hildrew, A.G.; Townsend, C.R. Multiple stressors in freshwater ecosystems. Freshw. Biol. 2010, 55, 1–4. [Google Scholar] [CrossRef]
  7. Dirzo, R.; Young, H.S.; Galetti, M.; Ceballos, G.; Isaac, N.J.B.; Collen, B. Defaunation in the Anthropocene. Science 2014, 345, 401–406. [Google Scholar] [CrossRef]
  8. Ceballos, G.; Ehrlich, P.R.; Barnosky, A.D.; Garcia, A.; Pringle, R.M.; Palmer, T.M. Accelerated modern humaninduced species losses: Entering the sixth mass extinction. Sci. Adv. 2015, 1, e1400253. [Google Scholar] [CrossRef] [Green Version]
  9. Dias, M.S.; Tedesco, P.A.; Hugueny, B.; Jézéquel, C.; Beauchard, O.; Brosse, S.; Oberdorff, T. Anthropogenic stressors and riverine fish extinctions. Ecol. Indic. 2017, 79, 37–46. [Google Scholar] [CrossRef]
  10. Darwall, W.R.T.; Freyhof, J. Lost fishes, who is counting? The extent of the threat to freshwater fish biodiversity. In Conservation of Freshwater Fishes; Closs, G.P., Krkosek, M., Olden, J.D., Eds.; Cambridge University Press: Cambridge, UK, 2016; pp. 3–36. [Google Scholar]
  11. Harrison, I.; Abell, R.; Darwall, W.; Thieme, M.L.; Tickner, D.; Timboe, I. The freshwater biodiversity crisis. Science 2018, 362, 1369. [Google Scholar] [CrossRef] [PubMed]
  12. Meyer, C.; Kreft, H.; Guralnick, R.; Jetz, W. Global priorities for an effective information basis of biodiversity distributions. Nat. Commun. 2015, 6, 8221. [Google Scholar] [CrossRef] [Green Version]
  13. Mitrofanov, V.P. Formation of modern ichthyofauna in Kazakhstan and ichthyogeographic zoning. In Fish of Kazakhstan; Nauka: Alma-Ata, Kazakhstan, 1986; pp. 20–40. [Google Scholar]
  14. Reshetnikov, Y.S.; Shakirova, F.M. Zoogeographic analysis of the ichthyofauna of Central Asia according to the lists of freshwater fish. J. Ichthyol. 1993, 33, 37–45. [Google Scholar]
  15. Burlibaev, M.J.; Kurochkina, L.Y.; Kascheev, V.A.; Erokhov, S.N.; Ivaschenko, A.A. (Eds.) Globally Significant Wetlands of Kazakhstan. Vol.3; Alakol-Sassykkol Lake System: Astana, Kazakhstan, 2007; pp. 1–295. [Google Scholar]
  16. Filonets, P.P. Essays on the Geography of Inland Waters of Central, Southern and Eastern Kazakhstan; Nauka: Alma-Ata, Kazakhstan, 1981; pp. 1–292. [Google Scholar]
  17. Amirgaliev, N.A.; Timirkhanov, S.R.; Alpeisov, S.A. Ichthyofauna and Ecology of the Alakol Lake System; Bastau: Almaty, Kazakzhstan, 2006; pp. 1–368. [Google Scholar]
  18. Yelshibekova, A.M.; Dan’ko, E.K.; Doukravets, G.M.; Zharkenov, D.K. To history of the formation and development of fish fauna of Alakol Lakes basin. Selevinia. Zool. Yearb. Kazakhstan Cent. Asia 2015, 23, 235–240. [Google Scholar]
  19. Dukravets, G.M.; Mitrofanov, V.P. History of fish acclimatization in Kazakhstan. In Fish of Kazakhstan; Nauka: Alma-Ata, Kazakhstan, 1992; Volume 5, pp. 6–44. [Google Scholar]
  20. Mitrofanov, V.P.; Dukravets, G.M. Some theoretical and practical aspects of fish acclimatization in Kazakhstan. In Fish of Kazakhstan; Nauka: Alma-Ata, Kazakhstan, 1992; Volume 5, pp. 329–371. [Google Scholar]
  21. Tereshchenko, V.G.; Strelnikov, A.S. Analysis of rearrangements in the fish part of the Lake Balkhash community as a result of the introduction of new fish species. J. Ichthyol. 1995, 35, 71–77. [Google Scholar]
  22. Petr, T.; Mitrofanov, V.P. The impact on fish stocks of river regulation in Central Asia and Kazakhstan. Lakes Reserv. Res. Manag. 1998, 3, 143–164. [Google Scholar] [CrossRef]
  23. Mamilov, N.S.; Balabieva, G.K.; Koishybaeva, G.S. Distribution of alien fish species in small waterbodies of the Balkhash basin. Russ. J. Biol. Invasions 2010, 1, 181–186. [Google Scholar] [CrossRef]
  24. Sokolovsky, V.R.; Timirkhanov, S.R. Fishes of the Alakol-Sasykkol system of lakes. In Proceedings of the Alakol State Nature Reserve; Mekte: Almaty, Kazakhstan, 2004; Volume 1, pp. 175–191. [Google Scholar]
  25. Mamilov, N. Schizothorax Argentatus. The IUCN Red List of Threatened Species, 2020, e.T156744412A156744418. Available online: https://www.iucnredlist.org/species/156744412/156744418 (accessed on 20 January 2021).
  26. Mamilov, N. Phoxinus Brachyurus. The IUCN Red List of Threatened Species, 2020, e.T156742076A156742081. Available online: https://www.iucnredlist.org/species/156742076/156742081 (accessed on 20 January 2021).
  27. Mamilov, N.; Karimov, B. Triplophysa Labiata. The IUCN Red List of Threatened Species, 2020, e.T156722567A156722639. Available online: https://www.iucnredlist.org/species/156722567/156722639 (accessed on 20 January 2021).
  28. Mamilov, N.; Karimov, B. Triplophysa Sewerzowi. The IUCN Red List of Threatened Species, 2020, e.T156721428A156721452. Available online: https://www.iucnredlist.org/species/156721428/156721452 (accessed on 20 January 2021).
  29. Greenville, A.C.; Newsome, T.M.; Wardle, G.M.; Dickman, C.R.; Ripple, W.J.; Murray, B.R. Simultaneously operating threats cannot predict extinction risk. Conserv. Lett. 2021, 14, e12758. [Google Scholar] [CrossRef]
  30. Kenzhebekov, B.K.; Dan’ko, Y.K.; Sansyzbayev, Y.T. Current state of the lakes in the Alakol system. Hydrometeorol. Ecol. 2018, 3, 145–151. [Google Scholar]
  31. French, B.; Wilson, S.; Holmes, T.; Kendrick, A.; Rule, M.; Ryan, N. Comparing five methods for quantifying abundance and diversity of fish assemblages in seagrass habitat. Ecol. Indic. 2021, 124. [Google Scholar] [CrossRef]
  32. Deacon, A.E.; Mahabir, R.; Inderlall, D.; Ramnarine, I.W.; Magurran, A.E. Evaluating detectability of freshwater fish assemblages in tropical streams: Is hand-seining sufficient? Environ. Biol. Fish 2017, 100, 839–849. [Google Scholar] [CrossRef] [Green Version]
  33. Bonar, S.A.; Hubert, W.A. Standard Sampling of Inland Fish: Benefits, Challenges, and a Call for Action. Fisheries 2020, 27, 10–16. [Google Scholar] [CrossRef]
  34. R Core Team. R: A Language and Environment for Statistical Computing; R Foundation for Statistical Computing: Vienna, Austria, 2017; Available online: http://www.R-project.org (accessed on 15 November 2021).
  35. Legendre, P.; Legendre, L. Numerical Ecology, 2nd ed.; Elsevier: Amsterdam, The Netherlands, 1998; 853p. (In English) [Google Scholar]
  36. Braak, C.J.E.; Verdonschot, P.E.M. Canonical correspondence analysis and related multivariate methods in aquatic ecology. Aquat. Sci. 1995, 57, 255–289. [Google Scholar] [CrossRef]
  37. Nekrashevich, N.G. Materials on the ichthyology of the Alakol lakes. In Alakol Depression and Its Lakes; Nauka: Alma-Ata, Kazakhstan, 1965; pp. 236–268. [Google Scholar]
  38. Strelnikov, A.S. Fish and Biological Foundations of Fisheries in the Alakol Lakes; Tomsk State University: Tomsk, Russia, 1974; 19p. [Google Scholar]
  39. Ward, J.V.; Stanford, J.A. The serial discontinuity concept: Extending the model of floodplain rivers. Regul. Rivers: Res. Manag. 1995, 10, 159–168. [Google Scholar] [CrossRef]
  40. Martynova, A.L.; Vasil’yeva, E.D. Problems of taxonomy and diagnostics of gudgeons of the genus Gobio (Cyprinidae) of the Urals, Siberia, Kazakhstan and the Amur river basin. J. Ichthyol. 2021, 61, 529–544. [Google Scholar] [CrossRef]
  41. Villéger, S.; Blanchet, S.; Beauchard, O.; Oberdorffe, T.; Brossea, S. Homogenization patterns of the world’s freshwater fish faunas. Proc. Natl. Acad. Sci. USA 2011, 108, 18003–18008. [Google Scholar] [CrossRef] [Green Version]
  42. Takács, P.; Abonyi, A.; Bánó, B.; Erős, T. Effect of non native species on taxonomic and functional diversity of fish communities in different river types. Biodivers. Conserv. 2021, 30, 2511–2528. [Google Scholar] [CrossRef]
  43. Vitousek, P.M.; Aber, J.D.; Howarth, R.W.; Likens, G.E.; Matson, P.A.; Schindler, D.W.; Schlesinger, W.H.; Tilman, D.G. Human alteration of the global nitrogen cycle: Sources and consequences. Ecol. Appl. 1997, 7, 737–750. [Google Scholar] [CrossRef] [Green Version]
  44. Lepori, F.; Keck, F. Effects of atmospheric nitrogen deposition on remote freshwater ecosystems. AMBIO 2012, 41, 235–246. [Google Scholar] [CrossRef] [PubMed] [Green Version]
  45. Schlesinger, W.H. On the fate of anthropogenic nitrogen. Proc. Natl. Acad. Sci. USA 2009, 106, 203–208. [Google Scholar] [CrossRef] [PubMed] [Green Version]
  46. Williams, S.E.; Williams, Y.M.; VanDerWal, J.; Isaac, J.L.; Shoo, L.P.; Johnson, C.N. Ecological specialization and population size in a biodiversity hotspot: How rare species avoid extinction. Proc. Natl. Acad. Sci. USA 2009, 106, 19737–19741. [Google Scholar] [CrossRef] [Green Version]
  47. Graham, N.A.; Pueppke, S.G.; Uderbayev, T. The current status and future of Central Asia’s Fish and Fisheries: Confronting a wicked problem. Water 2017, 9, 701. [Google Scholar] [CrossRef] [Green Version]
  48. Mischke, S.; Zhang, C.; Plessen, B. Lake Balkhash (Kazakhstan): Recent human impact and natural variability in the last 2900 years. J. Great Lakes Res. 2020, 46, 267–276. [Google Scholar] [CrossRef]
  49. Ussenaliyeva, A. Save Kazakhstan’s shrinking Lake Balkhash. Science 2020, 370, 303. [Google Scholar] [CrossRef] [PubMed]
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Figure 1. Schematic map of the investigated region: 1—Sasykkol Lake, 2—Koshkarkol Lake, 3—Alakol Lake, 4—Zhalanashkol Lake. The blue point shows the position of the Alakol Lakes in Eurasia.
Figure 1. Schematic map of the investigated region: 1—Sasykkol Lake, 2—Koshkarkol Lake, 3—Alakol Lake, 4—Zhalanashkol Lake. The blue point shows the position of the Alakol Lakes in Eurasia.
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Figure 2. Fish interspecies distribution similarity dendrogram (UPGMA, invariants were excluded). The names of the aboriginal species are shown in black; the introduced species are shown in red. The green line shows a significant positive correlation of pairwise comparison (Trs × Per, Abb × Cyp, etc.).
Figure 2. Fish interspecies distribution similarity dendrogram (UPGMA, invariants were excluded). The names of the aboriginal species are shown in black; the introduced species are shown in red. The green line shows a significant positive correlation of pairwise comparison (Trs × Per, Abb × Cyp, etc.).
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Figure 3. Position of samples from different rivers. Designations are given for the most deviating samples: Ala20z—Alakol Lake, estuary, 2020; Ala21lim—Alakol Lake, near Kabanbay settlement, wetland, 2021; Em20—Emel River 2020; Ua15 and Ua16—right side tributary of Tentek River in 2015 and 2016; Tk15, Tk16 and Tk21—Tentek River, depositional zone, 2015, 2016 and 2021.
Figure 3. Position of samples from different rivers. Designations are given for the most deviating samples: Ala20z—Alakol Lake, estuary, 2020; Ala21lim—Alakol Lake, near Kabanbay settlement, wetland, 2021; Em20—Emel River 2020; Ua15 and Ua16—right side tributary of Tentek River in 2015 and 2016; Tk15, Tk16 and Tk21—Tentek River, depositional zone, 2015, 2016 and 2021.
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Figure 4. CCA plot of species (objects), sites and environmental variables of water bodies in the Alakol Lakes watershed: first axis horizontally, second axis vertically. Abbreviations of sites are given in Table 2 and species in Table 4. Abbreviations of the environmental arrows are PPM—water mineralization, pH—pH value, temp—maximal observed water temperature (°C), FTU—water turbidity (formazin turbidity unit), NH4 and NO3 concentrations of ammonia and nitrates, respectively.
Figure 4. CCA plot of species (objects), sites and environmental variables of water bodies in the Alakol Lakes watershed: first axis horizontally, second axis vertically. Abbreviations of sites are given in Table 2 and species in Table 4. Abbreviations of the environmental arrows are PPM—water mineralization, pH—pH value, temp—maximal observed water temperature (°C), FTU—water turbidity (formazin turbidity unit), NH4 and NO3 concentrations of ammonia and nitrates, respectively.
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Figure 5. Distribution of ammonium ions in Lake Alakol in 2020 (left) and 2021 (right).
Figure 5. Distribution of ammonium ions in Lake Alakol in 2020 (left) and 2021 (right).
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Figure 6. Distribution of nitrate ions in Lake Alakol in 2020 (left) and 2021 (right).
Figure 6. Distribution of nitrate ions in Lake Alakol in 2020 (left) and 2021 (right).
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Table
Table 1. General characteristics of Alakol lakes [16,17].
Table 1. General characteristics of Alakol lakes [16,17].
LakeSurface Area, km2Maximum Depth, mMineralization, g L−1Inflows (Average % of Total Coming Water)
Sassykkol7364.70.27–2.16Tentek (95–100%), Karakol, Aiy
Koshkarkol1205.80.85–1.28Zheniskesu (wet years only)
Alakol265054.01.20–11.60Urzhar (50%), Emel (27%) Katynsu (9%), Yrgayity and Zhamanty (9%), Zhamanotkel (5%) and 10 other
Zhalanashkol383.31.20–5.00Has not any
Table
Table 2. Coordinates and abbreviations of sampling sites.
Table 2. Coordinates and abbreviations of sampling sites.
SiteCoordinatesYearsBiotopesAbbreviation
NEO
Alakol Lake, near Akshi settlement (recreation area)45°54′53″81°37′00″2021LakeAl21a
2021EstuaryAl21z
2020LakeAl20a
2020EstuaryAl20z
2017LakeAl17a
2016LakeAl16a
2015LakeAl15a
Alakol Lake,
eastern side		45°54′53″82°03′37″2020WetlandAl20e
2020LakeAl20l
Alakol Lake, near Kabanbay settlement (recreation area)46°05′41″82°01′29″2021LakeAl21b
2021WetlandAl21lim
Alakol Lake, near Koktuma settlement (recreation area)45°50′13″81°55′20″2021WetlandAl21k
Alakol Lake, near estuary of Zhamanty River45°54′47″81°37′30″2021EstuaryZm21
2020EstuaryZm20
2017EstuaryZm17
2016EstuaryZm16
Sassykkol Lake46°40′48″80°35′11″2021WetlandSK21
2020WetlandSK20
Zhamanty River, headwater zone45°51′34″81°24′58″2015Straight channel, streamZm15t
2016(no fish)
2017, 2020, 2021Dry channel(no water)
Tentek River, depositional zone46°12′25″80°53′09″2021Meandering channelTk21
2020Tk20
2017Tk17
2016Tk16
Tentek River, headwater zone46°03′17″81°01′37″2021Winding channelTk21t
46°03′17″81°01′37″2016Tk16t
46°03′17″81°01′37″2015Tk15t
46°03′17″81°01′37″2014Tk14t
Right side tributary of Tentek River 46°12′24″80°51′10″2017Meandering channelUa17
2016Ua16
2015Ua15
Tokty River, transfer zone45°26′03″82°15′13″2020Winding channelT20
Shynzhyly River, headwater zone45°49′28″80°33′51″2021Meandering channelSh21t
2020Sh20t
Shynzhyly River, transfer zone45°23′38″80°27′54″2021Winding channelSh21m
2020Sh20m
2017Sh17m
2016Sh16m
2015Sh15m
P.Shynzhyly, depositional zone46°12′20″80°52′15″2021Meandering channelSh21l
46°12′20″80°52′15″2020Sh20l
Urzhar River, transfer zone47°3′10″81°32′19″2021Meandering channelU21
47°3′10″81°32′19″2020U20
Karakol River, transfer zone46°57′53″80°44′32″2021Meandering channelKr21
Yrgayity River45°40′10″82°01′48″2015,2016,2020Straight channel, streamY20
Emel River, transfer zone46°22′46″82°15′16″2021Meandering channelE21
46°22′46″82°15′16″2020E20
Shagyntogay River, transfer zone46°16′43″82°13′14″2020Meandering channel(no fish)
2021Dry(no water)
Zhalanashkol Lake45°36′17″82°09′33″2021LakeZK21
45°36′17″82°09′33″2020ZK20
Katynsu River, transfer zone46°46′39″82°03′17″2021Meandering channelK21
46°46′39″82°03′17″2020K20
Table
Table 3. Fish diversity changes over time.
Table 3. Fish diversity changes over time.
Latin Name English NameAbbreviation for Revealed SpeciesUntil 1960 [37,38]1960–2014 [17,18,24]Original Data 2015–2017, 2020, 2021
Number of SamplesNumber of Fishes
Indigenous species:
Phoxinusphoxinus (Linnaeus, 1758)Eurasian minnowPhp++1118
Phoxinus brachiurus Berg, 1912Seven River’s minnowPhb0+128
Rhynchocypris poljakowii (Kessler, 1879)Balkhash minnowPol0+13282
Schizothorax argentatus Kessler, 1874Balkhsh marinka (snowtrout)Sha++17344
Gymnodiptychus dybowskii (Kessler, 1874)Naked osmanGyd++24806
Triplophysa strauchii (Kessler, 1872)Spotted thicklip loachTrs++28489
Triplophysa stoliczkai (Steindachner, 1866)Tibetan stone loachTst++15157
Triplophysa dorsalis (Kessler, 1872)Gray loachTdo++2131
Triplophysa labiata (Kessler, 1874)Plain loachTrl++12278
Triplophysa sewerzowii (G.Nikolsky, 1938)Severtsov’s loachTse++1890
Triplophysa dorsalis × Triplophysa stolickai(Hybrid)Hy10037
Triplophysa labiata × Triplophysa stolickai(Hybrid)Hy20013
Perca schrenkii Kessler, 1874Balkhash perchPer++16448
Alien species:
Acipenser ruthenus Linnaeus, 1758Sterlet sturgeon +000
Cyprinus carpio Linnaeus, 1758CarpCyp++317
Abramis brama (Linnaeus, 1758)BreamAbr0+448
Tinca tinca (Linnaeus, 1758)Tench +000
Ctenopharyngodon idella (Valenciennes, 1844)Grass carp 0+00
Hypophthalmichthysmolitrix (Valenciennes, 1844)Silver carp 0+ until 200000
Hypophthalmichthys (Aristichthys) nobilis (Richardson, 1845)Bighead carp 0+ until 200000
Pseudorasbora parva (Temminck et Schlegel, 1846)Pseudorasbora, or topmouth gudgeonPse0+16176
Carassius gibelio (Bloch, 1872)Prussian carpCag0+1046
Rhodeus ocellatus (Kner, 1866)Rosy bitterlingRho0011
Rutilus rutilus (Linnaeus, 1758)RoachRut0+321
Parabramis pekinensis (Basilewsky, 1855) White amur breamPab0023
Hemiculter leusiculus (Basilewsky, 1855)Sharpbelly 0+00
Abbottina rivularis (Basilewsky, 1855)Abbottina or false gudgeonAbb0+264
Gobio cynocephalus Dybowski, 1869Siberian gudgeonGcy00131
Lefua costata (Kessler, 1876)Eightbarbel loach 0+00
Oncorhnchus mykiss (Walbaum, 1792)Rainbow trout 0+00
Orizias latipes (Temminck et Schlegel, 1846)/Orizias sinensis Chen, Uwa et Chu, 1989Japanese rice fishOrs0+521
* Sander lucioperca (Linnaeus, 1758)Pike-perch 0+++
Sander volgensis (Gmelin, 1789)Volga pikeperch 0+00
Micropercops sinctus (Dabry de Thiersant, 1872) Mci0+39
Rhinogobius cheni (Nichols, 1931) Rhs0+22
* Observed in commercial catches only. 0—species was not revealed, +—species was revealed
Table
Table 4. Principle component factor loadings for the species.
Table 4. Principle component factor loadings for the species.
Fish SpeciesAbbreviationPrincipal Components
123
Indigenous:
Schizothorax argentatusSha0.00710.08430.2987
Gymnodiptychus dybowskiiGyd−0.0401−0.02720.2695
Rhynchocypris poljakowiiPol−0.0556−0.0436−0.4802
Triplophysa labiataTrl0.14690.16480.1446
Triplophysa dorsalisTdo0.0019−0.0068−0.1023
Triplophysa sewerzowiiTse0.3078−0.28840.0728
Triplophysa stoliczkaiTst−0.4990−0.39400.1230
Triplophysa strauchiiTrs−0.03170.07410.3327
Triplophysa dorsalis × Triplophysa stoliczkai Hy10.45220.3757−0.1560
Perca schrenkiiPer−0.08800.10300.1109
Phoxinus phoxinusPhpinvariant
Phoxinus brachiurusPhbinvariant
Triplophysa labiata × Triplophysa stoliczkaiHy2invariant
Alien:
Carassius gibelioCag−0.05220.05770.0628
Cyprinus carpioCyp−0.22410.2905−0.0796
Pseudorasbora parvaPse0.2222−0.3077−0.0742
Abbottina rivularisAbb−0.30970.3986−0.0575
Abramis bramaAbr−0.3495−0.2516−0.1354
Rutilus rutilusRut0.00860.02080.2356
Parabramis pekinensisPab0.3097−0.39860.0575
Orizias sinensisOrs−0.0144−0.0569−0.5579
Micropercops sinctusMci0.0120−0.0152−0.0309
Gobio cynocephalusGcyinvariant
Rhodeus ocellatusRhoinvariant
Rhinogobius cheniRhsinvariant
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Mamilov, N.; Sharakhmetov, S.; Amirbekova, F.; Bekkozhayeva, D.; Sapargaliyeva, N.; Kegenova, G.; Tanybayeva, A.; Abilkasimov, K. Past, Current and Future of Fish Diversity in the Alakol Lakes (Central Asia: Kazakhstan). Diversity 2022, 14, 11. https://doi.org/10.3390/d14010011

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Mamilov N, Sharakhmetov S, Amirbekova F, Bekkozhayeva D, Sapargaliyeva N, Kegenova G, Tanybayeva A, Abilkasimov K. Past, Current and Future of Fish Diversity in the Alakol Lakes (Central Asia: Kazakhstan). Diversity. 2022; 14(1):11. https://doi.org/10.3390/d14010011

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Mamilov, Nadir, Sayat Sharakhmetov, Fariza Amirbekova, Dinara Bekkozhayeva, Nazym Sapargaliyeva, Gulnar Kegenova, Ainur Tanybayeva, and Kanatbek Abilkasimov. 2022. "Past, Current and Future of Fish Diversity in the Alakol Lakes (Central Asia: Kazakhstan)" Diversity 14, no. 1: 11. https://doi.org/10.3390/d14010011

APA Style

Mamilov, N., Sharakhmetov, S., Amirbekova, F., Bekkozhayeva, D., Sapargaliyeva, N., Kegenova, G., Tanybayeva, A., & Abilkasimov, K. (2022). Past, Current and Future of Fish Diversity in the Alakol Lakes (Central Asia: Kazakhstan). Diversity, 14(1), 11. https://doi.org/10.3390/d14010011

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