A study of mucilage in light microscope photographs acquired by using a different painting material of Gomphonema sp.

Alp, Mehmet Tahir | Özbay, Özgür

This research was based on the patterns of Gomphonema sp. obtained from Lake Hazar (Elaziğ, Turkey), which has a high alkali feature. It was carried out by monitoring the live samples of patterns isolated from the littoral part of the lake, which was painted by a different material. It is known, to date, that India ink has been widely used in the painting of live algal sample. In this research, hematoxylen solution, which was commonly used in obtaining images from histologic isolated sample by using light microscope, was used instead of India ink. Incredibly, findings have been spotted in this research, which was carried out for the purpose of photographing the mucilage morphology of Gomphonema sp. in a clearer and more significant sense. Thus, this study was photographed under light micro...

Metal pollution status and health risk assessment of beach sediments along the Mersin coast, Turkey

Özbay, Özgür | Akçay, İsmail

In the present study, the ecological risk assessment of metal contamination in beach sediments along the Mersin coast was determined using the metal contents of beach sediments in Mersin, Kızkalesi, Susanoğlu and Taşucu region obtained between 2006 and 2009. Furthermore, the potential health risk assessment for ingestion and dermal contact pathways of adults and children was determined. Ecological risk assessment of heavy metals showed that there is no pollution in the beach sediments for the metals Cu, Pb and Zn for the all studied coasts. However, the high ecological risk indices calculated in this study strongly suggested an apparent Cd, Cr and Ni pollution in the studied beach sediments due to natural and anthropogenic contamination. Study findings indicated the HI values were greater ...

HEALTH RISK ASSESSMENT OF GÖKSU AND BERDAN RIVERS FOR NITRATE POLLUTION

Özbay, Özgür

Metal Pollution Status of Surface Sediments in the Two Coastal Regions of the Mersin Bay, Northeastern Mediterranean Sea

Akçay, İsmail | Özbay, Özgür

The objective of this study is to determine metal pollution status of surface sediments in the two coastal regions of Mersin Bay under the influence of Seyhan and Göksu River inflows for the 2005-2009 period. The average metal concentrations orders were found to be Al > Cr > Cu > Zn > Cd for the Station Mersin affected by Seyhan River inflows and Al > Zn > Cr > Cu > Cd for the Station Taşucu under the influence of Göksu River. According to classification of metal pollution of surface sediments, though there was no Cd pollution, the sediments are highly polluted by heavy metals Cr, Cu and Zn in the Seyhan River influenced coastal region due to agricultural and industrial wastewater discharges.

PLANKTONİK ALG GRUPLARI / Temel ve Spesifik Özellikleri

Alp, Mehmet Tahir | Özbay, Özgür

Deniz ve tatlısu planktonuna olan ilgi son 100 yıl içinde oldukça artmıştır. Son yıllarda dünya ve yurdumuz sularında kirliliğin ve atıksu tasfiye sistemlerinin özellikle alglerle birlikte ele alınması, fitoplanktona olan ilgiyi daha da artırmıştır. Deniz ve okyanuslarda milyonlarca balığın ölümüne sebep olan dinoflagellatlar ve tatlı su ekosistemlerinin toksik fitoplankterleri olarak bilinen mavi-yeşil algler fitoplankton ekolojisinde önemli yer tutmaktadır. Su Çerçeve Direktiflerinde; göllerin trofik düzeylerinin ve ekolojik kalitelerinin belirlenmesinde fitoplankton indeksleri ön plana çıkmıştır. Tatlısu ve deniz biyolojisi, balıkçılık, akuakültür, polüsyon biyolojisi ve ekosistem mühendisliğinin çeşitli alanlarında araştırıcılar akuatik sistemlerin doğru ve sürdürülebilir yönetimi (Göl...

TROPHIC STATUS ASSESSMENT OF GÖKSU AND BERDAN RIVERS, TÜRKİYE

Özbay, Özgür

Potential Health Risk Assessment for Nitrate Contamination in the Groundwater of Mersin Province, Türkiye

Özbay, Özgür

Though groundwater is one of the most significant natural water sources, its quality is deteriorating due to the anthropogenic pressures that poses health risks for people. In this study, potential health risk assessment for nitrate pollution in groundwater of Mersin Province was determined by commonly using health indices. Study findings indicated that the calculated Hazard Index (HI) values varied between 0.001 and 17.89 for the adults whilst the HI values ranging from 0.001 to 29.87 for the children. The HI values in the groundwater of Erdemli, Göksu and Anamur regions showed low chronic health risk for the adults and children (HI≤1). However, the calculated health risk indices indicated significant health hazards for the children inhabited between Tarsus and Çeşmeli regions (HI≥4.00) d...

Eutrophication Status of the Berdan and Göksu River Basins in Turkey

Akçay, İsmail | Özbay, Özgür | Alp, Mehmet Tahir

In this study, the eutrophication status of the Berdan and Göksu River Basins was determined by using recently obtained data between September 2021 and August 2022. Very high total phosphorus and trophic index (TRIX) values indicated that all stations visited in the Berdan, and Göksu River Basins were characterized as eutrophic (bad). The correlations between TRIX and eutrophication-related parameters showed strong and positive relations between TRIX and concentrations of Chlorophyll-a and total phosphorus strongly suggesting that the increase in total phosphorus concentrations highly enhanced primary productivity and eutrophication. The P-enrichment in the Berdan and Göksu River Basins caused eutrophication in these river waters, leading to the further development of coastal eutrophicatio...

Assessment of Ecological and Potential Health Risk Caused by Nitrate Pollution of the Berdan and Göksu River Basins, Turkey

Özbay, Özgür | Akçay, İsmail

To determine ecological and health risk assessment of the Berdan and Göksu river waters, principal physical and biochemical variables were measured monthly between September 2021 and August 2022 in the Berdan and Göksu river basins. Ecological risk assessment of the studied river basins indicated that both the Berdan and Göksu river waters were contaminated by phosphorus. Potential health risk assessment of the Berdan and Göksu river basins showed that the calculated Health Quotient values in the two visited stations in the Berdan river exceeded 0.1 indicating low cancer risk for both adults and children whilst one visited station in the Göksu River basin showed low cancer risk for children. The health risk assessment also indicated that the Health Quotient values calculated for children w...

MARMARA DENİZİ VE KUZEY EGE DENİZİ’NDE MÜSİLAJ OLUŞUMUNUN DENİZ ÇAYIRI POSIDONIA OCEANICA ÜZERİNE ETKİSİ

MEHMET TAHİR ALP | ÖZGÜR ÖZBAY

Bu çalışmada, Marmara Denizi ve Kuzey Ege Denizi kıyılarında müsilaj oluşumunun deniz çayırı Posidonia oceanica üzerine etkisinin belirlenmesi amaçlanmıştır. Örneklemeler 5 istasyondan (Paşalimanı Adası, Narlı-Erdek, İntepe, Saros Körfezi, Gökçeada) 2022 yılı Şubat ve Mayıs aylarında aletli dalış ile yapılmıştır. Posidonia oceanica’nın fenolojik analizleri ile temel özellikleri (shoot yoğunluğu, alt yayılış sınır derinlinliği, alt yayılış sınır tipi gibi) belirlenmiştir. Müsilajın P. oceanica üzerinde henüz bir etkisi tespit edilmemiştir. Ancak bentik bölgede bazı ipliksi alglerin (Acinetospora crinita, Ectocarpus spp., Cladophora spp. gibi) deniz çayırı üzerindeki aşırı artışının müsilaj oluşumunun bir habercisi olabileceği değerlendirilmiştir.

Determination of Heavy Metal Levels in Sediment and Macroalgae (Ulva Sp and Enteromorpha Sp.) on the Mersin Coast.

Alp, Mehmet Tahir | Özbay, Özgür | Sungur, Mehmet Ali

Mersin ili sınırları içerisinde halk tarafından yoğun olarak kullanılan dört plajda makroskobik yeşil algler (Ulva sp. ve Enteromorpha sp.) ve sedimentte ağır metallerin birikiminin belirlenmesi amacıyla, Alüminyum (Al), Krom (Cr), Mangan (Mn), Demir (Fe), Nikel (Ni), Bakır (Cu), Çinko (Zn), Kurşun (Pb), ve Kadmiyum (Cd) düzeyleri aylık olarak tespit edilmiştir. Yapılan analizler sonucunda Cu ve Zn istasyon 1, Cd istasyon 2 ve Al, Mn, Fe ve Ni ise istasyon 4’de alglerde en yüksek birikimi gösteren ağır metaller olmuşlardır. Ağır metallerin birikim düzeylerinin alglerde ve sedimentte sıralanması, Ulva sp.’de Fe> Al>Mn>Ni>Zn>Cr>Cu>Pb>Cd; Enteromorpha sp.’de Fe>Al>Ni>Mn>Zn>Cr>Cu>Pb>Cd; sediment örneklerinde ise Fe>Al>Mn>Ni>Cr>Zn>Pb>Cd>Cu şeklinde tespit edilmiştir

Hazar Gölü`nde Mevsimsel Olarak Ortaya Çıkan Cladophora glomerata`da Bazı Ağır Metal Düzeyleri

Alp, Mehmet Tahir | Özbay, Özgür

Alg türlerinde aðýr metal birikimi genellikle laboratuvar þartlarýnda çalýþýlmýþtýr. Bununla birlikte mikro alg türlerinin doðal habitatlarýndaki aðýr metal birikimleri konusunda oldukça sýnýrlý bilgi mevcuttur. Bu araþtýrmada, nispeten oligotrofik ve yüksek alkali bir göl özelliði sergileyen Hazar Gölü litoralinde ilkbahar sonu ve yaz baþlangýcýnda yoðun popülasyonlar oluþturan Cladophora glomerata'nýn (Clorophyta) absorbe ettiði bazý aðýr metal yükleri araþtýrýlmýþtýr. Elde edilen veriler suyun aðýr metal yükleri ile karþýlaþtýrýlmýþtýr. Toplanan alg örneklerinde Bakýr (Cu) 1,31-1,77 mg/g- C. glomerata, Demir (Fe) 58,5-218 mg/g- C. glomerata, Mangan (Mn) 2,75-4,99 mg/g- C. glomerata ve Çinko (Zn) 9,61-11,8 mg/g- C. glomerata olarak belirlenmiþtir. Sonuç olarak, C. glomerata insan saðlýðý...

BIOACCUMULATION OF HEAVY METALS IN MACROALGAE ALONG THE MERSIN COAST, NORTHEASTERN MEDITERRANEAN SEA

Akçay, İsmail | Özbay, Özgür

Nutrient inputs from two major rivers into the cilician basin of the north-eastern Mediterranean Sea.

Türkeri, Mehmet | Marankoz, Suat | Özbay, Özgür | Akçay, İsmail | Alp, Mehmet Tahir

In this study, dissolved nutrients concentrations were measured monthly at downstream points of the two regional rivers (the Berdan and Göksu rivers) flowing into the Cilician Basin of the North-eastern (NE) Mediterranean Sea.The dissolved nutrients data obtained between September 2021 and August 2022 were used to determine riverine nutrient fluxes. This study showed that spatial and temporal variations were recorded in nutrients concentrations of the two regional rivers with the maximum values consistently recorded in the Berdan River having lower volume fluxes.The annual nutrient inputs of the two regional rivers indicated that higher amounts of dissolved nutrients were carried by the Göksu River due to its higher volume fluxrate. The calculated molar ratios from total nitrogen (TN)and p...

Türkiye Suyosunları (Algler) Listesi'ne Eklentiler

Alp, Mehmet Tahir | Özbay, Özgür

In this paper, a total of 436 taxa at species and infraspecies level [328 Bacillariophyta (Diatoms), 32 Cyanobacteria (Blue Green Algae), 1 Dinophyta (Dinoflagellates), 2 Euglenophyta (Euglenophytes), 5 Ochrophyta (Yellow Brown Algae), 29 Rhodophyta (Red Algae), 12 Chlorophyta (Green Algae), 27 Charophyta (stoneworts)], which are not in the checklist of the Flora of Türkiye (Algae), and their Turkish names are given. Bu makalede, Türkiye Suyosunları Listesinde bulunmayan tür ve türaltı seviyede toplam 436 takson [328 Bacillariophyta (Diyatome Bölümü), 32 Cyanobacteria (Mavi-Yeşilbakteriler Bölümü), 1 Dinophyta (Ateşrengisuyosunları Bölümü), 2 Euglenophyta (Öglena Bölümü), 5 Ochrophyta (Sarı Kahverengi Alg Bölümü), 29 Rhodophyta (Kırmızı Algler), 12 Chlorophyta (Yeşil Alg Bölümü), 27 Ch...

Heavy Metal Distributions of Macroalgal Species From the Mersin Inner Bay, Türkiye

Özbay, Özgür | Akçay, İsmail

The bio-accumulation of heavy metals in macroalgae poses significant risks to marine ecosystems and human health. In this study, heavy metal distributions of macroalgae and potential health risk assessment in the Mersin inner Bay were determined from macroalgae (Stypopodium schimperi, Padina pavonica, Laurencia obtusa, Dictyota sp., Sargassum vulgare, Jania rubens, Halopithys sp., Osmundea sp., Halopithys incurve, Ulva intestinalis, Entromorpha flexuosa, Ulva linza) samples collected between February and September 2021. The levels of heavy metals were found as 1.24-5.93 g/kg for aluminum, 0.61-5.26 g/kg for iron, 1.17-7.61 mg/kg for cobalt, 0.03-0.21 mg/kg for cadmium, 4.26-43.10 mg/kg for chromium, 0.28-437.52 mg/kg for cupper, 17.90-139.08 mg/kg for manganese, 2.78-79.25 mg/kg for nickel...