The Zooplankton Community and Its Relationship With Environmental Variables in a Highly Polluted System, Golden Horn, Turkey

Dorak, Zeynep

doi:10.3153/jaefr15006

Cited by 6 publications

(8 citation statements)

References 28 publications

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“…Dorak and Albay, (2016) reported 59 zooplankton species in the Golden Horn Estuary, consisting of 6 species of Cladocera, 35 species of Rotifera, 7 species of Copepoda and meroplankton such as larvae of Bivalvia and Polychaeta (Table 3). The species composition of zooplankton recorded in our investigation varied from those reported in previous studies (Dorak and Temel, 2015;Dorak and Albay, 2016). Possible reason for this change could be the fact that after the opening of the water channel from the Istanbul Strait, more marine species had the opportunity to penetrate the Golden Horn Estuary.…”

Section: Discussioncontrasting

confidence: 45%

“…There are very few studies on zooplankton of the Golden Horn Estuary (Dorak, 2010;Dorak and Temel, 2015;Dorak and Albay, 2016), so we have compared our findings with these previous investigations. Dorak and Albay, (2016) reported 59 zooplankton species in the Golden Horn Estuary, consisting of 6 species of Cladocera, 35 species of Rotifera, 7 species of Copepoda and meroplankton such as larvae of Bivalvia and Polychaeta (Table 3).…”

Section: Discussionmentioning

confidence: 88%

“…Although there have been several studies on the phytoplankton community, pollution, physical and chemical characteristics of the estuary (e.g. Alpar, Yüce, & Türker, 2003;Aslan-Yılmaz, Okuş, & Övez, 2004;Taş, 2017), there have been a few studies about zooplankton structure (Dorak andTemel, 2015, Dorak andAlbay, 2016). There are however no data on the annual zooplankton abundance, diversity and species composition, after the opening of the water channel from the Strait of Istanbul.…”

Section: Introductionmentioning

confidence: 99%

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İşinibilir¹,

Doğan²

2020

Turk. J. Fish. Aquat. Sci.

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This paper examines spatial and temporal variations of zooplankton abundance and community structure from December 2014 to November 2015 after the opening of the water channel. So, this is the first zooplankton study after the opening of the water channel from the Istanbul Strait to the Golden Horn Estuary. It is thought that this study will be an important database for future studies in the region. A total of 40 species were identified during in this study. Nine species (Daphnia curvirostris, Daphnia hyalina, Bosmina (Eubosmina) coregoni, Cyclops abyssorum, Mnemiopsis leidyi, Pleurobrachia pileus, Beroe ovata, and Aurelia aurita) are first recorded in the Golden Horn and one of these (Bosmina (Eubosmina) coregoni) is also first records for the Turkish coasts. Furthermore, it has been observed that marine zooplankton abundance and diversity have increased in the estuary after the opening of the water channel.

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Section: Discussioncontrasting

confidence: 45%

Section: Discussionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

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Untitled

İşinibilir¹,

Doğan²

2020

Turk. J. Fish. Aquat. Sci.

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“…Spatial and temporal variation in zooplankton biomass, species composition and diversity have been well studied in aquatic ecosystems (Sun et al 2010;Benedetti et al 2017; Dube et al 2017) with little attention in highly turbid and nutrient-rich wetlands (Dorak and Temel 2015). Compared to oligotrophic systems, zooplankton biomass has been found to be higher in turbid and nutrients-rich ecosystems probably because of the absence of submerged plants, poor visibility of predators or availability of food (Muylaert et al 2003;Spoljar et al 2011;Lu et al 2012).…”

Section: Seasonal Variation Of Zooplankton Functional Groups Biomassmentioning

confidence: 99%

Seasonal dynamics of zooplankton functional group and its relationship with physico-chemical variables in high turbid nutrient-rich Small Xingkai Wetland Lake, Northeast China

Mwagona

et al. 2019

Journal of Freshwater Ecology

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In this study, the concept of functional traits was used to classify zooplankton into functional groups and their seasonal dynamics were determined in relation to physico-chemical factors in a highly turbid and nutrient-rich wetland. This study revealed a seasonal variation of both physico-chemical factors and biomass of zooplankton functional groups. Water temperature (TEP), total phosphorus (TP), ferrous ion (Fe 2þ) and total carbon (TC) were significantly higher in summer while water transparency (SD) was notably higher in spring. Zooplankton functional group biomass was higher in summer (5.11 mg/L) followed by winter, autumn and spring (0.91, 0.72 and 0.28 mg/L, respectively). Large copepods and cladoceran carnivore (LCC) was the dominant functional group in spring accounting for about 86.7% of the total biomass. In summer, MCF (Middle copepods and cladocerans filter feeders) was the dominant group probably because of the optimal temperature and availability of nutrients. Pearson correlation and RDA analysis results suggested that Fe 2þ , TP and TEP were the major factors influencing zooplankton functional groups. Notably, turbidity was not the main factor despite the fact that Small Xingkai Wetland Lake is a very turbid lake. The variation of zooplankton functional groups among seasons highlights the role of physicochemical factors in structuring zooplankton composition.

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“…The diversity, spatial and temporal distribution of zooplankton community in the GHE have received very little study to the present time (Uysal ; Dorak & Temel ). Accordingly, the objective of the present study was to determine the composition, abundance, diversity and distribution of the horizontal and seasonal variation of zooplankton in the GHE (Istanbul), depending on selected physical and chemical variables.…”

Section: Introductionmentioning

confidence: 99%

Effects of environmental factors on seasonal and spatial changes in surface zooplankton in Golden Horn Estuary (Istanbul, Turkey)

Dorak

Albay

2016

Lakes & Reservoirs

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The abundance and spatial distribution of zooplankton at monthly intervals were studied in polluted Golden Horn Estuary (Istanbul, Turkey), from July 2006 to December 2007. Selected water quality parameters also were measured. The zooplankton community was characterized by the presence of freshwater, estuarine and marine species, with a total of 59 taxa. Rotifers were the most important fraction of the total zooplankton, comprising 36.52% of all the samples. The zooplankton exhibited seasonal patterns, with the highest abundance occurring in the summer (979 ind. L À1 ) and the lowest in the spring (856 ind. L À1 ). Rotifera was the most abundant group in the upper and middle estuary, whereas Copepoda usually reaches the maximum densities in the higher salinity waters in the lower estuary. The study results indicated that both the sampling time (seasons) and sampling sites jointly had significant effects on the zooplankton densities (MANOVA P < 0.05), and horizontal patterns were related to electrical conductivity, water temperature, dissolved oxygen, suspended particulate matter, pH and chlorophyll a measured in the estuary.This study is part of the PhD thesis of Zeynep Dorak, titled 'Influences of abiotic factors on seasonal changes of zooplankton in Golden Horn, Istanbul, Turkey'.

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The Zooplankton Community and Its Relationship With Environmental Variables in a Highly Polluted System, Golden Horn, Turkey

Cited by 6 publications

References 28 publications

Untitled

Untitled

Seasonal dynamics of zooplankton functional group and its relationship with physico-chemical variables in high turbid nutrient-rich Small Xingkai Wetland Lake, Northeast China

Effects of environmental factors on seasonal and spatial changes in surface zooplankton in Golden Horn Estuary (Istanbul, Turkey)

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