Cyanobacterial Diversity and the Presence of Microcystins in the Küçük Menderes River Basin, Turkey
Although cyanobacteria are commonly associated with eutrophic lakes, they are the basic components of phytoplankton communities in lakes that have different trophic statuses. In inland waters, both nutrient loading from watersheds and warmer conditions promote phytoplankton growth and cause extensiv...
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Istanbul University Press
2022-06-01
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| Series: | Aquatic Sciences and Engineering |
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| Online Access: | https://cdn.istanbul.edu.tr/file/JTA6CLJ8T5/603C4D9F01624947928E07C4696A986C |
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| author | Latife Köker Ayça Oğuz Reyhan Akçaalan Albay Meriç Albay |
| author_facet | Latife Köker Ayça Oğuz Reyhan Akçaalan Albay Meriç Albay |
| author_sort | Latife Köker |
| collection | DOAJ |
| description | Although cyanobacteria are commonly associated with eutrophic lakes, they are the basic components of phytoplankton communities in lakes that have different trophic statuses. In inland waters, both nutrient loading from watersheds and warmer conditions promote phytoplankton growth and cause extensive cyanobacterial blooms. Certain bloom-forming cyanobacterial species can pose a health risk to humans and aquatic ecosystems through cyanotoxin production. The aim of this study was to evaluate the cyanobacterial composition and toxins in five reservoirs and two natural lakes in the Küçük Menderes River Basin, all with varying trophic statuses. Within this scope, samples were collected in autumn 2017 and spring 2018. Cyanobacterial species were enumerated according to the Utermöhl method. Cyanotoxin samples were analyzed using HPLC. To find the trophic status of the water bodies, the Trophic State Index (TSI) developed by Carlson (1977) was used and Total Phosphorus (TP), Secchi Depth (SD), and Chlorophyll-ɑ (chl-ɑ) measurements were performed. Cyanobacterial abundance, species composition, and cyanotoxin production differed significantly between the lakes and reservoirs. A total of 13 cyanobacteria species were identified including potential cyanotoxin producers such as Microcystis, Aphanizomenon, and Dolichospermum. According to the TSI, three reservoirs were mesotrophic and the other four waterbodies had eutrophic-hypereutrophic conditions. Microcystis is the most common bloom-forming freshwater cyanobacteria in the Küçük Menderes River Basin. However, microcystin concentrations were relatively low and the highest microcystin concentration was detected in the Tahtalı Reservoir at 9 µg/L. The Küçük Menderes River Basin is under water-stressed conditions and the cyanobacteria blooms in the region might pose another threat for wildlife and humans. |
| format | Article |
| id | doaj-art-b2fd199e4b3b4086bad5c05e3725ecec |
| institution | OA Journals |
| issn | 2602-473X |
| language | English |
| publishDate | 2022-06-01 |
| publisher | Istanbul University Press |
| record_format | Article |
| series | Aquatic Sciences and Engineering |
| spelling | doaj-art-b2fd199e4b3b4086bad5c05e3725ecec2025-08-20T02:28:34ZengIstanbul University PressAquatic Sciences and Engineering2602-473X2022-06-0137312913910.26650/ASE20221088270123456Cyanobacterial Diversity and the Presence of Microcystins in the Küçük Menderes River Basin, TurkeyLatife Köker0https://orcid.org/0000-0002-9134-2801Ayça Oğuz1https://orcid.org/0000-0002-0711-2967Reyhan Akçaalan Albay2https://orcid.org/0000-0002-0756-8972Meriç Albay3https://orcid.org/0000-0001-9726-945Xİstanbul Üniversitesi, İstanbul, Türkiyeİstanbul Üniversitesi, İstanbul, Türkiyeİstanbul Üniversitesi, İstanbul, Türkiyeİstanbul Üniversitesi, İstanbul, TürkiyeAlthough cyanobacteria are commonly associated with eutrophic lakes, they are the basic components of phytoplankton communities in lakes that have different trophic statuses. In inland waters, both nutrient loading from watersheds and warmer conditions promote phytoplankton growth and cause extensive cyanobacterial blooms. Certain bloom-forming cyanobacterial species can pose a health risk to humans and aquatic ecosystems through cyanotoxin production. The aim of this study was to evaluate the cyanobacterial composition and toxins in five reservoirs and two natural lakes in the Küçük Menderes River Basin, all with varying trophic statuses. Within this scope, samples were collected in autumn 2017 and spring 2018. Cyanobacterial species were enumerated according to the Utermöhl method. Cyanotoxin samples were analyzed using HPLC. To find the trophic status of the water bodies, the Trophic State Index (TSI) developed by Carlson (1977) was used and Total Phosphorus (TP), Secchi Depth (SD), and Chlorophyll-ɑ (chl-ɑ) measurements were performed. Cyanobacterial abundance, species composition, and cyanotoxin production differed significantly between the lakes and reservoirs. A total of 13 cyanobacteria species were identified including potential cyanotoxin producers such as Microcystis, Aphanizomenon, and Dolichospermum. According to the TSI, three reservoirs were mesotrophic and the other four waterbodies had eutrophic-hypereutrophic conditions. Microcystis is the most common bloom-forming freshwater cyanobacteria in the Küçük Menderes River Basin. However, microcystin concentrations were relatively low and the highest microcystin concentration was detected in the Tahtalı Reservoir at 9 µg/L. The Küçük Menderes River Basin is under water-stressed conditions and the cyanobacteria blooms in the region might pose another threat for wildlife and humans.https://cdn.istanbul.edu.tr/file/JTA6CLJ8T5/603C4D9F01624947928E07C4696A986Ccyanobacteriacyanotoxinreservoirlakealgal bloomseutrophication |
| spellingShingle | Latife Köker Ayça Oğuz Reyhan Akçaalan Albay Meriç Albay Cyanobacterial Diversity and the Presence of Microcystins in the Küçük Menderes River Basin, Turkey Aquatic Sciences and Engineering cyanobacteria cyanotoxin reservoir lake algal blooms eutrophication |
| title | Cyanobacterial Diversity and the Presence of Microcystins in the Küçük Menderes River Basin, Turkey |
| title_full | Cyanobacterial Diversity and the Presence of Microcystins in the Küçük Menderes River Basin, Turkey |
| title_fullStr | Cyanobacterial Diversity and the Presence of Microcystins in the Küçük Menderes River Basin, Turkey |
| title_full_unstemmed | Cyanobacterial Diversity and the Presence of Microcystins in the Küçük Menderes River Basin, Turkey |
| title_short | Cyanobacterial Diversity and the Presence of Microcystins in the Küçük Menderes River Basin, Turkey |
| title_sort | cyanobacterial diversity and the presence of microcystins in the kucuk menderes river basin turkey |
| topic | cyanobacteria cyanotoxin reservoir lake algal blooms eutrophication |
| url | https://cdn.istanbul.edu.tr/file/JTA6CLJ8T5/603C4D9F01624947928E07C4696A986C |
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