Determining effective environmental factors and ecology of non-marine Ostracoda (Crustacea) in Giresun, Turkey

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Tarih

2022

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

EDP Sciences SA

Erişim Hakkı

info:eu-repo/semantics/closedAccess

Özet

To determine influential environmental factors on ostracod species, 105 aquatic sampling sites were sampled from the Giresun province. Sixteen species collected from 69 sites are new records for the study area. Seven of 16 species were found in their expected geographical distribution while two species (Ilyocypris bradyi, Psychrodromus olivaceus) showed different distribution (P < 0.05). Of which, P. olivaceus displayed a limited distribution in the northern region of the study area. Geographical distribution of some species and their co-occurrences varied among habitats. The mean values of three variables (water temperature, electrical conductivity, and elevation) were significantly different in northern region than the values of the sampling sites in the southern region (P < 0.01). Canonical Correspondence Analysis explained 72.5% of the significant relationship (P < 0.05) between species and four most effective environmental variables (water temperature, electrical conductivity, elevation, and magnesium). Heterocypris salina and Potamocypris fallax exhibited maximum and minimum tolerance (and optimum) values for electrical conductivity, respectively. Heavy metal presence on the carapace surfaces was investigated using Energy Dispersive X-ray Analysis (EDX) along with SEM photographing. The observation of metals such as copper, aluminum, silver and even radioactive element such as technetium on the carapace surfaces suggests that the organisms studied actually carry much more information about their aquatic environment than it was thought. Overall, our results support the findings of previous studies that water temperature and electrical conductivity were the two most effective factors on ostracod species and can be responsible for their distribution and occurrences in sampling area. 16 ostracods are new records for Giresun. Distribution and co-occurrences of some species varied among habitats. The means of water temperature, electrical conductivity, and elevation were different in the northern region than the south. CCA explained 72.5% of the relationship between species and four variables. Copper, aluminum, silver and technetium were found on the carapace.

Açıklama

We thank to Dr. Manuel R. Palacios-Fest (Terra Nostra Earth Sciences Research, LLC, Arizona, USA) for his review and suggestions on the manuscript. Also, Drs. Necati Karakaya and Muazzez Celik-Karakaya (Konya Technique University) are thanked for information about water quality measurements in their studies. Dr. Nusret Karakaya (Bolu Abant zzet Baysal University) is also appreciated for his help during major ion analyses. We also thank our graduate students (Filiz Batmaz, Enes Dalgakran, Ozan Ylmaz, Umutcan Gurer, Enis Akay) for their continuous assistance during the field and laboratory work. Also, we recognize Emine Demirturk Yerebasmaz (Bolu Abant zzet Baysal University) for her assistance during SEM photography. This study was supported by the TuBTAK, Project No: 2130172.

Anahtar Kelimeler

Ecological Tolerance, Effective Factors, Ostracoda, Distribution, Diversity, Fresh-Water Ostracoda

Kaynak

International Journal of Limnology

WoS Q Değeri

N/A

Scopus Q Değeri

N/A

Cilt

58

Sayı

Künye

Çapraz, Ç., Külköylüoğlu, O., Akdemir, D., & Yavuzatmaca, M. (2022). Determining effective environmental factors and ecology of non-marine Ostracoda (Crustacea) in Giresun, Turkey. International Journal of Limnology, 58, 3.