References
- APHA. 1999. Standard methods for the examination of water and wastewater. (19th edn.). Washington DC: American Public Health Association. http://srjcstaff.santarosa.edu/~oraola/Assets/APHA_SM_20.pdf.
- Ayenew T, Legesse D. 2007. The changing face of the Ethiopian rift lakes and their environs: call of the time. Lakes and Reservoirs: Research and Management 12: 149−165. https://doi.org/https://doi.org/10.1111/j.1440-1770.2007.00332.x.
- Ballot A, Kotut K, Novelo E, Krienitz L. 2009. Changes of phytoplankton communities in Lakes Naivasha and Oloidien, examples of degradation and salinization of lakes in the Kenyan Rift Valley. Hydrobiologia 632: 359−363. https://doi.org/https://doi.org/10.1007/s10750-009-9847-0.
- Ballot A, Krienitz L, Kotut K, Wiegand C, Metcalf JS, Codd GA, Pflugmacher S. 2004. Cyanobacteria and cyanobacterial toxins in three alkaline Rift Valley lakes of Kenya—Lakes Bogoria, Nakuru and Elmenteita. Journal of Plankton Research 26: 925−935. https://doi.org/https://doi.org/10.1007/s00248-019-01332-8.
- Clavero E, Hernández-Mariné M, Grimalt JO, Garcia-Pichel F. 2000. Salinity tolerance of diatoms from thalassic hypersaline environments. Journal of Phycology 36: 1021−1034. https://doi.org/https://doi.org/10.1046/j.1529-8817.2000.99177.x.
- Cvetkoska A, Pavlov A, Jovanovska E, Tofilovska S, Blanco S, Ector L, Wagner-Cremer F, Levkov Z. 2018. Spatial patterns of diatom diversity and community structure in ancient Lake Ohrid. Hydrobiologia 819: 197−215. https://doi.org/https://doi.org/10.1007/s10750-018-3637-5.
- Gasse F. 1986. East African diatoms: taxonomy, ecological distribution. Berlin and Stuttgart: J Cramer.
- Gasse F, Talling J, Kilham P. 1983. Diatom assemblages in East Africa: classification, distribution and ecology [lakes, water chemistry]. Revue d’Hydrobiologie Tropicale 16: 3−34. https://horizon.documentation.ird.fr/exl-doc/pleins_textes/cahiers/hydrob-trop/03257.pdf.
- GebreMariam Z. 2002. The effects of wet and dry seasons on concentrations of solutes and phytoplankton biomass in seven Ethiopian rift-valley lakes. Limnologica 32: 169−179. https://doi.org/https://doi.org/10.1016/S0075-9511(02)80006-8.
- GebreMariam Z, Kebede E, Desta Z. 2002. Long-term changes in chemical features of waters of seven Ethiopian rift-valley lakes. Hydrobiologia 477: 81−91. https://doi.org/https://doi.org/10.1023/A:1021061015788.
- GebreMariam Z. Taylor W. 1997. Bacteria—chlorophyll relationships in Ethiopian lakes of varying salinity: are soda lakes different? Journal of Plankton Research 19: 647−654. https://doi.org/https://doi.org/10.1093/plankt/19.5.647.
- Golubtsov AS, Dgebuadze YY, Mina MV. 2002. Fishes of the Ethiopian rift valley. In: Tudorancea C, Taylor WD (Eds), Ethiopian rift valley lakes. Leiden: Backhuys Publishers. pp 167–258.
- Hecky RE, Kilham P. 1973. Diatoms in alkaline, saline lakes: ecology and geochemical implications. Limnology and Oceanography 18: 53−71. https://doi.org/https://doi.org/10.4319/lo.1973.18.1.0053.
- Hilaluddin F, Yusoff FM, Toda T. 2020. Shifts in diatom dominance associated with seasonal changes in an estuarine-mangrove phytoplankton community. Journal of Marine Science and Engineering 8: 528. https://doi.org/https://doi.org/10.3390/jmse8070528.
- Hötzel G, Croome R. 1999. A phytoplankton methods manual for Australian freshwaters. Land and Water Resources Research and Development Corporation Occasional papers 22/99. http://phytobioimaging.unisalento.it/Portals/7/Documents/General_Documentation/A%20Phytoplankton%20Manual%20 methods%20Australia.pdf.
- Kadigi RM, Mwathe K, Dutton A, Kashaigili J, Kilima F. 2014. Soda ash mining in lake Natron: a reap or ruin for Tanzania? Journal of Environmental Conservation Research 2. 37−49. https://doi.org/https://doi.org/10.12966/jecr.05.01.2014.
- Kalff J. 2002. Limnology: inland water ecosystems. Upper Saddle River: Prentice Hall.
- Kebede E, Ahlgren G. 1996. Optimum growth conditions and light utilization efficiency of Spirulina platensis (= Arthrospira fusiformis) (Cyanophyta) from Lake Chitu, Ethiopia. Hydrobiologia 332: 99−109. https://doi.org/https://doi.org/10.1007/BF00016689.
- Kebede E, Willén E. 1996. Phytoplankton in a salinity-alkalinity series of lakes in the Ethiopian Rift Valley. PhD Thesis, Acta Universitatis Upsaliensis, Sweden. Retrieved from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-115741.
- Kebede E, Gebre-Mariam Z, Ahlgren I. 1994. The Ethiopian Rift Valley lakes: chemical characteristics of a salinity–alkalinity series. Hydrobiologia 288: 1–12. https://doi.org/https://doi.org/10.1007/BF00006801.
- Kihwele E, Lugomela C, Howell K, Nonga H. 2015. Spatial and temporal variations in the abundance and diversity of phytoplankton in Lake Manyara, Tanzania. International Journal of Innovative Studies in Aquatic Biology and Fisheries (IJISABF) 1: 1−14.
- Kocer MAT, Şen B. 2012. The seasonal succession of diatoms in phytoplankton of a soda lake (Lake Hazar, Turkey). Turkish Journal of Botany 36: 738−746.
- Kocer MAT, Şen B. 2014. Some factors affecting the abundance of phytoplankton in an unproductive alkaline lake (Lake Hazar, Turkey). Turkish Journal of Botany 38: 790−799. doi: https://doi.org/10.3906/bot-1310-2
- Komárek J, Kling H. 1991. Variation in six planktonic cyanophyte genera in Lake Victoria (East Africa). In: Archiv für Hydrobiologie, Supplement Volumes 21−45. Stuttgart: Algological Studies.
- Krienitz L, Dadheech PK, Kotut K. 2013. Mass developments of the cyanobacteria Anabaenopsis and Cyanospira (Nostocales) in the soda lakes of Kenya: ecological and systematic implications. Hydrobiologia 703: 79−93. https://doi.org/https://doi.org/10.1007/s10750-012-1346-z.
- Krienitz L, Kotut K. 2010. Fluctuating algal food populations and the occurrence of Lesser flamingos (Phoeniconaias minor) in three kenyan rift valley lakes. Journal of Phycology 46: 1088−1096. https://doi.org/https://doi.org/10.1111/j.1529-8817.2010.00915.x.
- Kumssa T, Bekele A. 2014a. Phytoplankton composition and physico-chemical parameters study in water bodies of Abijata-Shala Lakes National Park (ASLNP), Ethiopia. Greener Journal of Biological Sciences 4: 69−76. doi: https://doi.org/10.15580/GJBS.2014.2.1210131023
- Kumssa T, Bekele A. 2014b. Current population status and activity pattern of lesser flamingos (Phoeniconaias minor) and greater flamingo (Phoenicopterus roseus) in Abijata-Shala Lakes National Park (ASLNP), Ethiopia. International Journal of Biodiversity 2014: Article ID 295362. https://doi.org/https://doi.org/10.1155/2014/295362.
- Lanzen A, Simachew A, Gessesse A, Chmolowska D, Jonassen I, Øvreås L. 2013. Surprising prokaryotic and eukaryotic diversity, community structure and biogeography of Ethiopian soda lakes. PLoS ONE 8: e72577. https://doi.org/https://doi.org/10.1371/journal.pone.0072577.
- Le Turdu C, Tiercelin J-J, Gibert E, Travi Y, Lezzar K-E, Richert J-P, Massault M, Gasse F, Bonnefille R, Decobert M, et al. 1999. The Ziway–Shala lake basin system, Main Ethiopian Rift: influence of volcanism, tectonics, and climatic forcing on basin formation and sedimentation. Palaeogeography, Palaeoclimatology, Palaeoecology 150: 135−177. https://doi.org/https://doi.org/10.1016/S0031-0182(98)00220-X.
- Luo W, Kotut K, Krienitz L. 2013. Hidden diversity of eukaryotic plankton in the soda lake Nakuru, Kenya, during a phase of low salinity revealed by a SSU rRNA gene clone library. Hydrobiologia 702: 95−103. https://doi.org/https://doi.org/10.1007/s10750-012-1310-y.
- Luo W, Li H, Kotut K, Krienitz L. 2017. Molecular diversity of plankton in a tropical crater lake switching from hyposaline to subsaline conditions: Lake Oloidien, Kenya. Hydrobiologia 788: 205−229. https://doi.org/https://doi.org/10.1007/s10750-016-2998-x.
- Ma C, Chula Mwagona P, Yu H, Sun X, Liang L, Al-Ghanim KA, 2019. Spatial and temporal variation of phytoplankton functional groups in extremely alkaline Dali Nur Lake, North China. Journal of Freshwater Ecology 34: 91−105. https://doi.org/https://doi.org/10.1080/02705060.2018.1554545.
- Milbrink G. 1977. On the limnology of two alkaline lakes (Nakuru and Naivasha) in the East Rift Valley System in Kenya. Internationale Revue der Gesamten Hydrobiologie und Hydrographie 62 1−17. https://doi.org/https://doi.org/10.1002/iroh.1977.3510620101.
- Morando M, Capone DG. 2018. Direct utilization of organic nitrogen by phytoplankton and its role in nitrogen cycling within the Southern California Bight. Frontiers in Microbiology 9: 2118. https://doi.org/https://doi.org/10.3389/fmicb.2018.02118.
- Noel SD, Rajan M. 2015. Evaluation of Organic Pollution by Palmer’s Algal Genus Index and Physico-chemical Analysis of Vaigai River at Madurai, India. Natural Resources and Conservation 3: 7−10. https://doi.org/https://doi.org/10.13189/nrc.2015.030102.
- Nowrouzi S, Valavi H. 2011. Effects of environmental factors on phytoplankton abundance and diversity in Kaftar Lake. Journal of Fisheries and Aquatic Science 6: 130. https://doi.org/https://doi.org/10.3923/jfas.2011.130.140.
- Nweze NO. 2006. Seasonal variations in phytoplankton populations in Ogelube Lake, a small natural West African Lake. Lakes and Reservoirs: Research and Management 11: 63−72. https://doi.org/https://doi.org/10.1111/j.1440-1770.2006.00292.x.
- Oduor S, Schagerl M. 2007a. Phytoplankton primary productivity characteristics in response to photosynthetically active radiation in three Kenyan Rift Valley saline–alkaline lakes. Journal of Plankton Research 29: 1041−1050. https://doi.org/https://doi.org/10.1093/plankt/fbm078.
- Oduor S, Schagerl M. 2007b. Temporal trends of ion contents and nutrients in three Kenyan Rift Valley saline-alkaline lakes and their influence on phytoplankton biomass. In: Gulati RD, Lammens E, De Pauw N, Van Donk E (Eds), Shallow Lakes in a Changing World. Developments in Hydrobiology (Vol. 196). Dordrecht: Springer. pp 59−68. https://doi.org/https://doi.org/10.1007/978-1-4020-6399-2_6.
- Oduor SO, Kotut K. 2016. Soda lakes of the East African Rift System: the past, the present and the future. In: Schagerl M (Ed.), Soda Lakes of East Africa. Switzerland: Springer. pp 365−374.
- Ogato T. 2015. Dynamics of phytoplankton and physicochemical features of the Ethiopian soda lakes Chitu and Shala, and evaluation of the potential of their waters for the production of Arthrospira (Spirulina) fusiformis (Cyanophyta) in laboratory cultures. PhD thesis. Addis Ababa University, Ethiopia.
- Ogato T, Kifle D. 2017. Phytoplankton composition and biomass in tropical soda Lake Shala: seasonal changes in response to environmental drivers. Lakes and Reservoirs: Research and Management 22: 168−178. https://doi.org/https://doi.org/10.1111/lre.12169.
- Ogato T, Kifle D, Lemma B. 2016. Algal composition and biomass in the tropical soda lake Chitu with focus on seasonal variability of Arthrospira fusiformis (Cyanophyta). Marine and Freshwater Research 67: 483−491. https://doi.org/https://doi.org/10.1071/MF14426.
- Ogato T, Kifle D, Fetahi T, Sitotaw B. 2014. Evaluation of growth and biomass production of Arthrospira (Spirulina) fusiformis in laboratory cultures using waters from the Ethiopian soda lakes Chitu and Shala. Journal of Applied Phycology 26: 2273−2282. https://doi.org/https://doi.org/10.1007/s10811-014-0251-4.
- Okoth OE, Mucai M, Shivoga WA, Miller SN, Rasowo J, Ngugi CC. 2009. Spatial and seasonal variations in phytoplankton community structure in alkaline–saline Lake Nakuru, Kenya. Lakes and Reservoirs: Research and Management 14: 57−69. https://doi.org/https://doi.org/10.1111/j.1440-1770.2009.00392.x.
- Rajkumar M, Perumal P, Ashok Prabu V, Vengadesh Perumal N, Thillai Rajasekar K. 2009. Phytoplankton diversity in Pichavaram mangrove waters from south-east coast of India. Journal of Environmental Biology 30: 489–498
- Saravanakumar A, Rajkumar M, Thivakaran GA, Serebiah JS. 2008. Abundance and seasonal variations of phytoplankton in the creek waters of western mangrove of Kachchh-Gujarat. Journal of Environmental Biology 29: 271–274
- Schagerl M, Burian A, Gruber-Dorninger M, Oduor SO, Kaggwa MN. 2015. Algal communities of Kenyan soda lakes with a special focus on Arthrospira fusiformis. Fottea 15: 245−257. https://doi.org/https://doi.org/10.5507/fot.2015.012.
- Schagerl M, Oduor S. 2008. Phytoplankton community relationship to environmental variables in three Kenyan Rift Valley saline-alkaline lakes. Marine and Freshwater Research 59: 125−136. https://doi.org/https://doi.org/10.1071/MF07095.
- Stenger-Kovács C, Lengyel E, Buczkó K, Tóth FM, Crossetti LO, Pellinger A, Doma ZZ, Padisák J. 2014. Vanishing world: alkaline, saline lakes in Central Europe and their diatom assemblages. Inland Waters 4: 383−396. https://doi.org/https://doi.org/10.5268/IW-4.4.722.
- Sui F, Zang S, Fan Y, Ye H. 2016. Effects of different saline-alkaline conditions on the characteristics of phytoplankton communities in the lakes of Songnen Plain, China. PLoS ONE 11: e0164734. https://doi.org/https://doi.org/10.1371/journal.pone.0164734.
- Talling J, Driver D. 1963. Some problems in the estimation of chlorophyll-a in phytoplankton. Proceedings of the Conference of Primary Productivity Measurement, Marine and Freshwater, University of Hawaii, Honolulu, Atomic Energy Commission TID-7633. pp 142−146.
- Tilahun G, Ahlgren G. 1965. The chemical composition of African lake waters. Internationale Revue der Gesamten Hydrobiologie und Hydrographie 50: 421−463. https://doi.org/https://doi.org/10.1002/iroh.19650500307.
- Ter Braak CJ, Smilauer P. 2002. CANOCO reference manual and CanoDraw for Windows user’s guide: software for canonical community ordination (version 4.5). Ithaca: Canoco. www.canoco.com.
- Tilahun G, Ahlgren G. 2010. Seasonal variations in phytoplankton biomass and primary production in the Ethiopian Rift Valley lakes Ziway, Awassa and Chamo–The basis for fish production. Limnologica 40: 330−342. https://doi.org/https://doi.org/10.1016/j.limno.2009.10.005.
- Tudorancea C, Harrison AD. 1988. The benthic communities of the saline lakes Abijata and Shala (Ethiopia). Hydrobiologia 158: 117–123. https://doi.org/https://doi.org/10.1007/BF00026270.
- Von Damm K, Edmond J. 1984. Reverse weathering in the closed-basin lakes of the Ethiopian Rift. American Journal of Science 284: 835−862. https://doi.org/https://doi.org/10.2475/ajs.284.7.835.
- Wagaw S, Mengistou S, Getahun A. 2019. Review of anthropogenic threats and biodiversity assessment of an Ethiopian soda lake, Lake Abijata. African Journal of Aquatic Science 44: 103−111. https://doi.org/https://doi.org/10.2989/16085914.2019.1596065.
- Wetzel RG, Likens GE. 2000. Limnological analyses. (3rd edn.). New York: Springer. https://doi.org/https://doi.org/10.1007/978-1-4757-3250-4.
- Wood R, Talling J. 1988. Chemical and algal relationships in a salinity series of Ethiopian inland waters. Hydrobiologia 158: 29–67. https://doi.org/https://doi.org/10.1007/BF00026266.