The response of benthic foraminifer, ostracod and mollusc assemblages to environmental conditions: a case study from the Camalti Saltpan (Izmir-Western Turkey)

Abstract

The subject of this report is benthic foraminifer populations preserved in the saltpan of Camalti in the Province of Izmir. High salinity in certain habitats of Ammonia tepida Cushman may be the primary cause of the high rate of twins and triplets as well as other morphological abnormalities recorded within this species (50 % as compared to an anomaly rate of 1 % in normal marine waters). Thicker cyst membrane developing in extremely saline environments may encourage twins and other morphological deformities by denying free movement of the offspring. Ecological factors such as heavy metal contamination of ambient waters as well as contamination by other wastes are also not ruled out as leading to such developmental anomalies. Of the 27 collected samples, Number 5 (that is closest to the sea) includes the typical marine foraminifers. Nonion depressulum (Walker & Jacob), Ammonia tepida Cushman and Porosononion subgronosum(Egger) are the dominant species in other samples. A total of 63 abnormal individuals (8 triplets, 24 twins, and 31 morphological anomalies) was found within seven of the 27 samples collected. Ten samples contained freshwater ostracods: Darwinula stevensoni(Brady and Robertson), Leptocythere lacertosa Hirschmann, Cyprideis torasa (Jones), Cyprideis (C.) anatolica Bassiouni, and Loxochoncha elliptica Brady. Among these samples (some of which contained only a few species of ostracods - and those limited in number of offspring), one had an unusually high ratio of healthy foraminifers vs those with anomalies. Worthy of note in another sample was a high abundance of molluscs. Among pelecypods, were found Ostrea edulis Linné, Lucinella divaricata (Linné), Pseudocama gryphina Lamarck,Cerastoderma edule (Linné), and Scrobicularia plana da Costa; and among gastropods were identified Hydrobi (Hydrobia) acuta(Draparnaud), Rissoa labiosa (Montagu), R. parva (da Costa), R. violacea Desmarest, Pirenella conica (Blainville), Bittium desayesi(Cerulli and Irelli), B. lacteum Philippi and B. reticulatum Philippi.

Multiproxies (Benthic Foraminifera, Ostracods and Biopolymers) Approach Applied to Identify the Environmental Partitioning of the Guadiana River Estuary (Iberian Peninsula)

“…This species is commonly found in environments with high concentrations of organic matter (Loureiro et al, 2009) and was observed in most stations, but had higher density values in the stations GD04 and GD05, located in a tributary channel. In these stations, a large number of ostracods juveniles were observed, possibly because they are more sheltered areas that favor the reproduction of this mesohalin species (Meric et al, 2010).…”

Fossil and Recent Distribution and Ecology of Ancient Asexual Ostracod Darwinula stevensoni (Ostracoda, Crustacea) in Turkey

“…obs. unpublished data), Bursa (Altınsaçlı and Griffiths 2001a); Balıkesir (Altınsaçlı and Griffiths 2001b); Düzce (Gülen 1985); Afyon (Gülen 1985); Denizli (Altınsaçlı and Mezquita 2008); İzmir (Meriç et al 2010); Isparta (Özuluğ et al 2001); Konya (Akdemir 2004); Aksaray (Altınsaçlı 2004); Şanlıurfa (Özuluğ and Dökümcü 2014); Diyarbakır (Gülen et al 1996;Akdemir and Külköylüoğlu 2011); Erzincan (Akdemir and Külköylüoğlu 2014).…”

Měkkýší fauna (Gastropoda, Bivalvia) z lokality Mušlov (vídeňská pánev)

“…Druh Diodora italica je v recentu vázán převážně na hloubky od 10-60 m (Russo 2017). V podobné hloubce žije také druh Pseudochama gryphina (Meric et al 2010). Převážně v mělkých vodách jsou rozšířeni zástupci čeledi Conidae, kteří jsou na lokalitě zastoupeni větším množstvím druhů (Chira, Voia 2001;Harzhauser, Landau 2016).…”