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Copyright of Ege Journal of Fisheries & Aquatic Sciences (EgeJFAS) / Su Ürünleri Dergisi is the property of Ege Journal of Fisheries & Aquatic Sciences (EgeJFAS) / Su Urunleri Dergisi and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ege Journal of Fisheries & Aquatic Sciences (EgeJFAS) / Su Ürünleri Dergisi is the property of Ege Journal of Fisheries & Aquatic Sciences (EgeJFAS) / Su Urunleri Dergisi and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ege Journal of Fisheries & Aquatic Sciences (EgeJFAS) / Su Ürünleri Dergisi is the property of Ege Journal of Fisheries & Aquatic Sciences (EgeJFAS) / Su Urunleri Dergisi and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ege Journal of Fisheries & Aquatic Sciences (EgeJFAS) / Su Ürünleri Dergisi is the property of Ege Journal of Fisheries & Aquatic Sciences (EgeJFAS) / Su Urunleri Dergisi and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ege Journal of Fisheries & Aquatic Sciences (EgeJFAS) / Su Ürünleri Dergisi is the property of Ege Journal of Fisheries & Aquatic Sciences (EgeJFAS) / Su Urunleri Dergisi and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Demre Creek is one of the most important rivers of Southwest Anatolia with its basin width of about 1000 km2 and its delta of 22 km2. Beymelek Lagoon on the south of Demre delta was formed by accumulation of Demre Creek alluvial deposit before Beymelek Bay through coastal dynamics under the effect of prevailing south wind. The lake fed by karstic sources is independent of Demre Creek basin except for southwest delta and sandbars. In this research, it was determined that Demre Creek was formed during Neogene Period and that it first flowed into Beymelek Bay and later into the Mediterranean Sea from the southwest of the bay. Also, Demre Creek used these valleys throughout Pliocene-Lower Pleistocene Periods, but left these places due to tectonic activities and climatic fluctuations of the area and started to flow from its current valley during Middle Pleistocene. In this research, which aimed to determine the relation between the valley changes of Demre Creek during Paleogeography Periods and Beymelek Bay, geologic and geomorphologic characteristics of Demre Creek basin were analyzed in details and especially the evolution of the basin from its formation to Prior Holocene was dealt with. [ABSTRACT FROM AUTHOR]

This study focuses on the sedimentary records of climatic changes in the Küçükçekmece Lagoon over the last 1300 a. The main objective of the study is to investigate the envirenmental conditions in Istanbul during the Little Ice Age (LIA, 600-100 a BP) and Medieval Warm Period (MWP, 1000-600 a BP), which occurred in Europe during the last millenia. The Küçükçekmece Lagoon is situated on the northern shoreline of the Sea of Marmara, west of İstanbul. It has a surface area of 15 km², maximum depth of 20 m and water volume of 145×106m³. The lagoon is connected to Sea of Marmara via a 2 km long natural narrow channel. The main freshwater input is mainly from small sterams and groundwater springs (Altun el al., 2009). The Little Ice Age was a period of mountain glacier expansion during 16th-mid 19th century period during which European climate was strongly impacted (Bradley and Jones, 1993; Jones et al., 1998; Mann et al., 1998, 1999; Mann, 2002). This period begins with a trend towards enhanced glacial conditions in Europe following the warm conditions of the so-called MWP. The LIA terminated with a dramatic retreat of the Alpine glaciers during the 20th century. During this period the temperature was 0.5-0.7°C lower than 1950's avarage. The previous Holocene climate studies in Turkey are rare and mostly confined to the Black Sea and Central Anatolia regions (e.g., Jones et al. 2006; Fleitmann et al, 2009; Kuzucuoğlu et al, 2011). In view of the variability of the present-day climate of Turkey mainly because of its geographic location and topography, and scarcity of data in NW Turkey, the recovery of late Holocene climate records from Küçükçekmece Lagoon (İstanbul) is very important. For this prupose we collected one short interface core (0.6 m) and one 4.5 m long piston core from the Küçükçekmece lagoon. The cores were analyzed for physical properties (magnetic susceptibilty: MS, gamma density, and resistivity) at 5 mm resolution using Multi Sensor Core Logger (MSCL), and multi-elemental analyis at 0.2 mm resolution using XRF (X-Ray Fluoresance) core scanner. The cores were then sampled at 50 mm intervals for total inorganic carbon (TIC), total organic carbon (TOC), and micropaleontological (ostracoda and benthic foraminifera) analysis. The micropaleontological analysis was made in the sand size fraction under binocular microscope. The ostracoda and benthic foraminifera individuals are identified. Suitable species of ostracoda (Loxoconcha sp.) and benthic foraminifera (Ammonia sp.) were picked and analyzed for the stable oxygen and carbon isotope analysis. Four samples were dated using AMS 14C analysis. The ages were calibrated to calendar year by CALIB 6.0 software using INTCAL 9.0 and MARINE 9.0 options. The short and long cores were correlated using the MS profiles and a continuous composite section was constituted. The lithology of the composite core section in general consists of homogenous olive green mud that rarely includes layers of plant remains and laminated intervals. The benthic foraminifera and ostracoda distribution suggests that the lagoon has been brackish over the last 1300 a. The age model was obtained from the calibrated AMS C-14 datings of two total bulk organic carbon and two plant remain layers. The multiproxy data were used to analyze the evaporation/precipitation changes in sediment cores. Increasing MS (SI), Ti (cps) values and decreasing of δ18O-δ13C (% VPDB), Ca/Ti, Sr/Ca ratio and TOC (%wt) values were interpreted to show wet conditions. We also modified the Leng and Marshall's (2004) δ18O-δ13C model for the Küçükçekmece Lagoon. The multi-proxy physical properties, geochemical and stable O- and C-isotope data in Küçükçekmece Lagoon show that wet conditions prevailed during ca 220-70 a BP, 1300-750 a BP and dry conditions during ca 70- 0 a BP, 750-220 a BP. The late (250-100 a BP) and early episodes (600- 250 a BP) of the Little Ice Age period was wet and and dry, respectively. During the the Medieval Warm Period (1000-600 a BP) wet conditions occurred in the region. The climate records also show that decadal-scale wet periods occurred during 340-270 a BP and 680-610 a BP, and dry periods during ca 1050 - 1000 a BP, 1130-1080 a BP and 1260-1210 a BP. Climatic records of Küçükçekmece Lagoon shows similarity with European records in Little Ice Age and Medieval Warm Period. [ABSTRACT FROM AUTHOR]