On the relationship between the occurrence of ostracod species and elevation in Sakarya province, Turkey

2019

Acta Zool Acad Sci H

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Total of 26, 22 and 32 sites in Konya, Antalya and West Mediterranean basins in Turkey, respectively, were sampled twice during 2017 to compare the non-marine ostracod diversity. A total of 1787 individuals belonging to 31 species were recorded from all basins. Of which, nine species are common among basins when Fabaeformiscandona fragilis is new for Turkey. High species diversity was found at middle elevational intervals. The highest and lowest Shannon diversity index values were recorded for both Konya (H = 2.19) and Antalya (H = 1.90) basins, respectively. The highest beta diversities values are encountered between closed the Konya and other open basins. Species and environmental variables composition among basins and elevational intervals showed significant differences (p < 0.05, ANOSIM). Of species, cosmopolitans (e.g., Candona neglecta, Ilyocypris bradyi, Psychrodromus olivaceus) provide an important contribution to the differences in diversities among basins and elevational intervals. According to Canonical Correspondence Analysis, elevation appeared to be the common influential variables in all basins. Results suggest that alpha diversity is under the control of local and regional factors when beta diversity is primarily affected by regional factor. Although cosmopolitan species are positive indicators, they seem to make a significant contribution to alpha and beta diversities of ostracods.

Section: Discussionsupporting

confidence: 84%

Comparative analyses of non-marine ostracods (Crustacea) among water basins in Turkey

2019

Acta Zool Acad Sci H

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“…Until now, it has been reported from a variety of habitats including lotic and lentic water bodies (Meisch 2000;Külköylüoğlu 2013). The wide preferences of species for different kinds of habitats are due to its wide tolerance levels to different ecological variables (Külköylüoğlu et al 2017a;Yavuzatmaca et al 2018). This is the case in the present study since it represented lotic and lentic habitats at 2nd level of Fig.…”

Section: Discussionmentioning

confidence: 63%

Species assemblages of Ostracoda (Crustacea) from west-site of Turkey: their indicator potential for lotic and lentic habitats

2020

Biologia

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To describe the indicator potential of non-marine ostracods for lotic (streams) and lentic (lakes) habitats, 42 taxa (27 recent, 15 subfossil) were evaluated from 62 sampling sites in West-site of Turkey during May of 2018. Nannocandona faba is a new report for Turkey. A higher Shannon diversity value was reported for lakes (H′ = 2.16) than streams (H′ = 1.62) when they had equal number of species (17 spp.). SIMPER analysis showed 53.01% contribution of Psychrodromus olivaceus, Candona neglecta, Heterocypris incongruens and Stenocypria fischeri with a 96.72% difference between lakes and streams. Both TWINSPAN and Indicator Species Analysis revealed that P. olivaceus (p < 0.01) and S. ficheri (p < 0.05) were found to be candidate indicators for the lotic and lentic habitats, respectively. The first two axes of CCA explained 66.90% of the relationship between species and environmental variables when elevation, dissolved oxygen concentration and water temperature showed influential effects (p < 0.05) on the ordination of species. Species with reduced swimming setae (17 spp.) were ordinated relatively closer to the center of CCA. Results showed that ecological tolerances of species seemed to be more deterministic than morphological characters (e.g., swimming setae) on their habitat preferences. A broad knowledge of the morphological and ecological preferences of the species is needed to distinguish whether habitat is chosen by species due to its ecological needs or morphological characteristics. Studies providing information about the current ecological preferences of the species give the opportunity to understand the habitat of these species.

“…Although the conducted studies gave different results, it is widely believed that elevation is not the primary factor, but as a secondary factor, it affects the distribution of ostracods. Yavuzatmaca et al (2018) and references therein discussed it in detail and supported the secondary effect of elevation on the distribution of ostracods. This is because of the dependence of the air and water temperatures on the elevation, and then changes of physico-chemical parameters due to the water temperature fluctuations in water played an important role to support this view.…”

Section: Introductionmentioning

confidence: 76%

Comparison of Ostracoda (Crustacea) species composition between lakes and streams at high elevations in Turkey

Acta Zool. Acad. Sci. Hung.

2021

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Ostracods are one of the most suitable organisms because of their ecological and morphological preferences for habitat types to study the diversity between streams and lakes. Here, 24 streams and 16 lakes were sampled in 2019 to evaluate the species compositions between streams and lakes. Environmental heterogeneity in the sense of the physico-chemical variables was found among the habitats. 24 of the 29 species with 923 individuals were found in the lakes when 13 species with 898 individuals were found in the streams. Eight species were common in both habitat types. Species contributing about 70.81% to the significant differences in the species composition between the habitats showed cosmopolitan characteristics. Species variation among the replicates of lakes were higher than streams. Results indicated that the species composition was probably associated to dissolved oxygen in lakes, while electrical conductivity in streams. Relationship amid elevational range and ostracod species richness was negative in lakes when there was no clear relationship in the streams. Overall, results suggested that determination of influential regional factors in different aquatic bodies can provide important contributions to the estimation of which habitat types can be chosen by species, and the using of species as bioindicators.