AI Summary & Key Takeaways
AI InsightOwing to inadequate light conditions caused by high turbidity in this basin, it was assumed that the high amount of phosphate could not be recycled, but rather transported to the middle part of the bay where it enhanced the formation of phytoplankton bloom.
📌 3 Key Takeaways
Abstract
Eutrophication has become an important environmental problem in coastal waters and its effects have increased due to the inflow of organic compounds and nutrients as well as the alterations in nutrient ratios. Besides the impact of streams, Izmir Bay, particularly the inner part of the bay, receives mainly continuous domestic and industrial inputs of phosphate. Occasionally, these inputs can reach extreme levels. Consequently, continuous phosphorus enrichment has been occurring. Nevertheless, the fate of phosphate, its effect on the phytoplankton biomass and the species dominancy in this biomass are poorly known. The seasonal patterns of phosphate, chlorophyll-a and abundance distributions of phytoplankton were determined in Izmir Bay between 1993 and 1994 in order to document the relationship between phosphate and phytoplankton. In spring, the increase in phytoplankton abundance associated with the phosphate decline suggested that the phosphorus uptake by phytoplankton was a major process responsible for the phosphate removal. It seemed that the bulk of inorganic phosphate in summer, i.e., June 94, results from the resuspended anthropogenic sediment load in the water column in the inner part of the bay, which is a semi-enclosed coastal basin. Owing to inadequate light conditions caused by high turbidity in this basin, it was assumed that the high amount of phosphate could not be recycled, but rather transported to the middle part of the bay where it enhanced the formation of phytoplankton bloom.
Özet
Ötrofikasyon kıyı sularında önemli bir çevresel problem oluşturmaktadır. Organik madde ve besin tuzu girdilerindeki artış, besin tuzu oranlarındaki değişimler, ötrofikasyonun etkilerini arttırmaktadır. İzmir Körfezi'ne, özellikle iç kesimine, nehirlerin etkilerinin yanısıra fosfatça zengin arıtılmamış evsel ve endüstriyel atık sular da taşınmaktadır. Bu girdiler bazen aşırı seviyelere ulaşabilmektedir. Sonuç olarak, İzmir Körfezi'nde aşırı fosfat zenginleşmesi oluşmaktadır. Bununla birlikte, fosfat döngüsünün gidişat özellikleri ve bunun fitoplankton biyokütlesi üzerindeki etkileri ve bu biyokütledeki baskın türler üzerine elde edilen bilgiler sınırlı kalmıştır. 1993-1994 yılları arasında yapılmış olan bu çalışmada, fosfat, Chl-a ve fitoplankton bolluk dağılımı mevsimsel olarak izlenerek ve fosfat ve fitoplankton ilişkisinin görüntülenmesi amaçlanmıştır.