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HCMR TEYXOS 7 Ergasia Mediterranean Marine Science Research Article Indexed in WoS (Web of Science, ISI Thomson) The journal is available on line at http://www.medit-mar-sc.net The response of benthic foraminifer, ostracod and mollusc assemblages to environmental conditions: a case study from the Camalti Saltpan (Izmir-Western Turkey) E. MERIC1, N. AV AR2, A. NAZ K3, . F. BARUT4, F. BERG N5, N. BALKIS4, M.S. ÖNCEL6 and S. KAPAN-YE LYURT7 Corresponding author: [email protected] Received: 19 December 2008; Accepted: 27 November 2009 Published on line: 4 March 2010 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 mem- brane developing in extremely saline environments may encourage twins and other morphological defor- mities 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 devel- opmental anomalies. Of the 27 collected samples, Number 5 (that is closest to the sea) includes the typi- cal marine foraminifers. Nonion depressulum (Walker and 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 sam- ples collected. Ten samples contained freshwater ostracods: Darwinula stevensoni (Brady and Robertson), Leptocythere lacertosa Hirschmann, Cyprideis torosa (Jones), Cyprideis (C.) anatolica Bassiouni, and Loxo- choncha 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 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 Hydrobia (Hydro- bia) 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. Keywords: Benthic foraminiferal deformities; Gastropods; Molluscs; Geochemistry; Camalti Salt- pan; Izmir-Turkey. Medit. Mar. Sci., 11/1, 2010, 05-32 5 Introduction et al., 2009). This organometal has been used as a biocide in antifouling paints on Because of their short life cycles and ships, boats and off-shore installations and special habitat requirements, benthic as fungicide in agriculture and wood preser- foraminifers are affected by environmental vation (BAUER et al., 1997; OEHLMANN changes and can be used as bio-indicators et al., 1998a). High levels of TBT may af- of pollution in coastal environments fect the ecosystems and cause hazards to (FERRARO et al., 2006). Morphological abnormalities in foraminifer tests are ob- served in polluted environments and may Table 1 represent a useful bio-marker for evaluat- Annual averages salinity in sampling stations. ing long-term environmental impacts (VILELA et al., 2004). However, strong nat- ural stress caused by hypersalinity or salin- Sample No. Salinity %o S ity variations is found to be more effective on abnormal test development, disturbing February April August the test construction (GESLIN et al., 1998 1 -- 35,0 52,5 and 2002). Twins, triplets and other mor- 2 -- 35,0 52,5 phological aberrations have been reported 3 -- 35,0 88,7 worldwide from different locations with hy- 4 -- 45,0 88,7 persaline environments, such as the Araru- 5 -- -- 44,8 ma Lagoon in Rio de Janeiro (STOUFF et 6 -- 35,0 267,7 al., 1999a), several small inland pools in Is- 7 -- -- 267,7 rael (ALMOGI-LABIN et al., 1992) and 8202,7 192,0 273,0 coastal environments of middle Aegean Sea 9 202,7 202,7 257,2 affected by anthropogenic activities 10 202,7 202,7 257,2 (TRIANTAPHYLLOU et al., 2005). Mor- 11 130,0 130,0 250,0 phologically abnormal foraminifer speci- 12 130,0 120,0 144,0 mens were observed in some of the loca- 13 120,2 120,0 177,7 tions in the Camalti Saltpan ( zmir, Turkey) 14 -- 110,0 215,0 where the salinity ranges between 40 and 15 82,0 70,0 70,0 273 %o in August (Table 1). The purpose 16 82,0 60,0 70,0 of this study is to verify the twins, triplets and other morphological aberrations in 17 -- 33,0 40,0 foraminifers from the Camalti Saltpan and 18-- 33,0 40,0 the possible causes of their origin. 19 -- 33,0 40,0 Despite the observed relation between 20 -- 33,0 44,8 shell deformities in bivalves and tributyltin 21 -- 35,0 44,8 (TBT) pollution (MINCHIN et al., 1996; 22 -- 35,0 44,8 ALZIEU, 2000; COELHO et al., 2006), lit- 23 -- 35,0 44,8 tle if any studies have focused on the effect 24 -- 35,0 52,5 of TBT on gastropod shell morphology. 25 -- -- 88,5 TBT is one of the pollutants of concern 26 -- -- 45,0 in the North Sea (VAN DEN BROECK, 27 -- -- 45,0 6 Medit. Mar. Sci., 11/1, 2010, 05-32 organisms, such as imposex, reproduction, The other by-product at Camalti Salt- deformities, etc. (ISMAIL, 2006). In bi- pan is Artemia salina living within high salin- valves TBT has the potential to induce shell ity pools and channels. It is used at aquar- deformities and may reduce reproductive ium and cultural fisheries as fish food and success (BEAUMONT et al., 1992; is produced and marketed at the Camalti MINCHIN et al., 1996; ALZIEU, 2000; Saltpan. Because this species is vital for salt COELHO et al., 2006), while in female gas- formation, it is forbidden to collect and dis- tropods TBT can cause masculinization pose of Artemia salina eggs (UCAL AND (SMITH, 1981; BAUER et al., 1997; ERGEN, 1994). OEHLMANN et al., 1998b; RILOV et The Camalti Saltpan (Fig. 1) covers an al., 2000; STRAND and JACOBSEN, 2002; area of approximately 10 km2, a long nar- TEWARI et al., 2002). Thus, some mol- row coastal strip cordoned off from the Gulf luscs can help in the monitoring and man- southward of the mouth of the Gediz Riv- agement of heavy metals in the coastal er (sections zmir L 17 b2 and Kütahya K ecosystems. 1 on the official maps at 1/25000). There In Turkey salt is produced from four are 36 evaporation pools with a total sur- different sources in seas, lakes, outcrop- face area of 20000 m2, 15 collection pools pings and springs. The only saltpan utiliz- with a total surface of 600 m2, 21 cold fresh- ing seawater is located in the Camalti re- water reservoirs with a total surface of gion in the Province of zmir. The Camalti 3000000 m2, and 74 crystallization pools with Saltpan, north of the city on the eastern a total surface of 1195000 m2. In March and reaches of the Gulf of zmir, was established April the saltpan is rinsed with water from by the Italians in 1906. After the founding the sea to clear the flats of seaweed and oth- of the Republic of Turkey, it continued to er unwanted components; the rinse-water operate under the name of ‘Tuz Inhisari' is subsequently diverted back into the sea. (the ‘Salt Monopoly') until it was incorpo- Then in May the seawater that has reached rated into the Turkish State Monopolies the Baumé temperature of 2.5-5.0 (25.5- (Tekel Genel Müdürlü ü) in 1932. 52.25 %o) is let into the collection pools and At the Camalti Saltpan, production is left to reach Baumé 12 (12 %o), after which based on the very old and slow locomotive it is conducted into the freshwater reser- system: seawater is pumped into salt pools voirs where Ca SO4 is deposited when it and the evaporation procedure is very slow. reaches Baumé 23 (25 %o) at the cold wa- The crystallization pools have a soft sub- ter pools Fe3O is precipitated with CO3 . strate and need special modernization tech- Brine (18 Baumé) is transferred to other niques. There are two by-products of salt pools for evaporation until it reaches 23 production. The first one concerns the waste Baumé. From here the precipitate is taken water discharge into the sea, which contains into the hot-water crystallization pools, salt derivatives such as MgCl2 , Br, KCl and where it reaches Baumé 27.5 (28.5 %o) with- also the economically important Mg(OH)2 . in 3-4 days. A 25-30 cm layer of salt is pre- Modernization of the system will make it cipitated here. At this stage the sodium economically feasible to enlarge the capacity chloride content of the precipitate is 94- of the saltpan. Turkey does not have solid 95 % and its color is pinkish due to its plank- potassium sources and the KCl used in the ton content. It is then stored in heaps over fertilization industry is imported. the winter. With drainage and winter Medit. Mar. Sci., 11/1, 2010, 05-32 7 Fig. 1: Location map of study area. precipitation, the sodium chloride content tetrachloride was added to the dried sam- rises to 98%. ples to bring foraminifer and ostracod pop- ulations in the material to the surface. Both Materials and Methods the foraminifer and ostracod specimens were collected on filter paper and sepa- Investigation of foraminifer, ostracod rated by size using different sieves with 2.00, and mollusc populations was performed on 1.00, 0.500, 0.250 and 0.125 mm mesh size.
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