Role of Saharan dust on phytoplankton dynamics in the northeastern Mediterranean

Eker-Develi, Elif
Kıdeyş, Ahmet Erkan
Effects of atmospheric deposition and other environmental factors on phytoplankton dynamics were evaluated from an open (having offshore characteristics) and a coastal station in the northeastern Mediterranean between December 2000 and December 2001. Data on phytoplankton, chlorophyll a, nutrients, temperature and salinity were obtained at bi-weekly or more intense intervals during 1 yr, whilst transport of Saharan dust towards the sampling region was monitored daily by SeaWiFS (sea-viewing wide field-of-view sensor) images. Diatoms were the group of highest average biomass during the entire investigation period. Although coccolithophores (mainly Emiliania huxleyi) numerically dominated at the open station during the study period, their maximum abundance was as low as 50 x 10(3) cells l(-1). The intensity of dust transport was observed to be highest in spring. Less intense transports were observed in summer and autumn. Several intense episodic dry and wet dust deposition events during the spring season observed by SeaWiFS images caused little or no increase in phytoplankton abundance and biomass in the following days and weeks. Nevertheless, it appears that less intense dust transport events increased phytoplankton abundance and biomass in August, September and October 2001, when water column stratification was at its peak. However, these increases were much weaker than the major winter-early spring bloom (in February and March), which was caused by upwelling, mixing the water column. We suggest that the impact of atmospheric nutrient input on phytoplankton in the Mediterranean is rather low on a yearly basis.


Modulation of frontogenetic plankton production along a meandering jet by zonal wind forcing: An application to the Alboran Sea
Oguz, Temel; Mourre, Baptiste; Tintore, Joaquin (2017-08-01)
We present a coupled physical-biological modeling study to elucidate the changes in ageostrophic frontal dynamics and the frontogenetic plankton production characteristics of a meandering jet under the impacts of successive westerly/easterly wind events combined with seasonal variations in the upstream transport and buoyancy flux characteristics of the jet, using a case study for the Alboran Sea (Western Mediterranean). Their nonlinear coupling is shown to result in different forms of physical and biologica...
Effect of temperature on clearance rate daily ration and digestiontime of Mnemiopsis leidyi from the southern Caspian Sea
M,, Rowshantabari; Finenko, Ga; Kıdeyş, Ahmet Erkan; Kiabi, B. (University of Guilan, 2012-06-01)
The effect of temperature on the main feeding parameters of Mnemiopsis leidyi from the southern Caspian Sea was studied in 2002. The clearance rates and daily rations were estimated from laboratory experiments in a wide range of temperatures from 12 to 27 ?C for M. leidyi of 12?17 mm in length. Clearance rate values changed from 52.5 to 107.3 ml ind-1 h-1. The coefficient Q10 in temperature 12 - 20 ?C was higher than that in 20 - 27 ?C (3.81 and 1.91, respectively). The specific daily ration changed from 1....
Impact of alternating wet and dry periods on long-term seasonal phosphorus and nitrogen budgets of two shallow Mediterranean lakes
Coppens, Jan; ÖZEN, ARDA; Tavsanoglu, U. Nihan; Erdogan, Seyda; Levi, Eti E.; Yozgatlıgil, Ceylan; Jeppesen, Erik; Beklioğlu, Meryem (2016-09-01)
The water balance, with large seasonal and annual water level fluctuations, has a critical influence on the nitrogen and phosphorus dynamics of shallow lakes in the semi-arid climate zone. We constructed seasonal water and nutrient budgets for two connected shallow lakes, Lakes Mogan and Eymir, located in Central Anatolia, Turkey. The study period covered 20 years with alternations between dry and wet years as well as restoration efforts including sewage effluent diversion and biomanipulations in Lake Eymir...
Impact of Climate Change in the Southern Mediterranean of Turkey: A method to assess Oymapinar reservoir’s inflow projections
Mesta Yoleri, Buket; Kentel Erdoğan, Elçin; Yücel, İsmail; Department of Earth System Science (2022-6)
Assessment of trends in climatological parameters observed in the last decades and the climate change projections through modeling studies indicated a high potential of increasing temperatures, decreasing precipitation, and runoff for Southern Europe and the Mediterranean basin. Within the scope of this study, climate change analysis for Antalya and its surrounding basins is conducted and the effects of climate change on streamflow in Oymapınar Basin and inflow of Oymapınar HEPP that is used for energy prod...
Weekly Variations in Phytoplankton Structure of a Harbour in Mersin Bay north eastern Mediterranean
Eker Develi, Elif; Kıdeyş, Ahmet Erkan (2000-01-01)
Weekly variations in the phytoplankton composition of a harbour in Mersin Bay were studied with two methods: filtration for the assessment of >55 μm phytoplankton from July 1995 to June 1997; and sedimentation for the assessment of all phytoplankton (both>55 μm and <55 μm) between 15 February and 25 May in 1996. With both sampling methods, a total of 175 phytoplankton species were identified. In the filtered samples, the total diatom abundance was much higher than that of dinoflagellates. The highest diatom...
Citation Formats
E. Eker-Develi, A. E. Kıdeyş, and S. TUĞRUL, “Role of Saharan dust on phytoplankton dynamics in the northeastern Mediterranean,” MARINE ECOLOGY PROGRESS SERIES, pp. 61–75, 2006, Accessed: 00, 2020. [Online]. Available: