Akademik Veri Yönetim Sistemi
JOURNAL OF AQUACULTURE ENGİNEERİNG AND FİSHERİES RESEARCH, cilt.1, sa.2, ss.57-71, 2015 (Hakemli Dergi)
The Golden Horn Estuary (İstanbul)
nutrient-rich, eutrophic and turbid at the inner part based on discharges from
Alibeyköy and Kağıthane creeks. The pollution had been drastically increased by
the accretion in the industry and ur-ban development around the estuary since
1950s. The Golden Horn rehabilitation project was carried out during the
1998-2002 period. The present study was conducted following the rehabilitation
process between November 2002-October 2003 at selected four stations, three at
the in-ner part and one at the middle part of estuary. This is the first study
on zooplankton community in the Golden Horn Estuary. The seasonal variation of
zooplankton composition and density and 14 environmental variables
(temperature, salinity, Secchi disc depth, turbidity, pH, dissolved oxygen,
carbonate, bicarbonate, calcium, magnesium, total hardness, NO2-N, NO3-N, o-PO4)
and Chlorophyll-a concentration, which indicates the intensity of life
in the Golden Horn Es-tuary have been studied, monthly. A total of 29 taxa was
identified. Zooplankton composition was characterized by freshwater, estuarine
and marine species. Zooplankton of Golden Horn Estuary was composed mainly by holoplank-tonic
organisms (53% of the total), with Copepoda as the most abundant group and a
high number of taxa. Diversity were higher at all stations. A distinct
relationship between zooplankton taxa composition and their environment,
deter-mined by a redundancy analysis, indicated that the measured environmental
variables contributed to the variations in the zooplankton community structure
to some extent. Four envi-ronmental variables and Chlorophyll-a explained
73.7% of the variation in the taxonomic structure. The results showed, that
distribution of zooplankton was significantly associated total hardness, NO2-N,
NO3-N, temperature and Chloro-phyll-a (p<0.05).