scholarly journals Golden Horn Estuary: Description of the ecosystem and an attempt to assess its ecological quality status using various classification metrics

2010 ◽  
Vol 11 (2) ◽  
pp. 295 ◽  
Author(s):  
S. ALBAYRAK ◽  
N. BALKIS ◽  
H. BALKIS ◽  
A. ZENETOS ◽  
A. KURUN ◽  
...  
Keyword(s):  
Anthropogenic Pollution ◽  
Marmara Sea ◽  
Ecological Quality ◽  
Industrial Facilities ◽  
Golden Horn ◽  
Ecological Quality Status ◽  
Middle Station ◽  
Golden Horn Estuary ◽  
Quality Status

In this paper, we describe the pelagic and benthic ecosystem of the Golden Horn  estuary opening into the Marmara Sea. To improve the water quality of the estuary, which had long been subject to severe anthropogenic pollution (industrial, chemical, shipping),  industrial facilities were moved from the estuary in the 1980s, followed by a rehabilitation plan in the 1990s. Our results, based on chemical parameters and phytoplankton showed some signs of improvement of water conditions in the upper layer. However, macrozoobenthic findings of this study did not reflect such a recovery in bottom life.An approach to the Ecological Quality Status (EQS) assessment was performed by applying the biotic indices BENTIX, AMBI, BOPA, BO2A. Our final assessment was based on 'expert-judgements' and revealed a very disturbed overall ecosystem with 'bad' EQS for the station at the head of the estuary,  'poor' in the rest of the estuary and 'moderate' EQS only in the middle station.

scholarly journals The pressures and the ecological quality status of the Marmara Sea (Turkey) by using marine macroalgae and angiosperms

2020 ◽  
pp. 632-638
Author(s):  
Ergün Taşkın ◽  
İbrahim Tan ◽  
Orkide Minareci ◽  
Ersin Minareci ◽  
Hakan Atabay ◽  
...  
Keyword(s):  
Ecological Status ◽  
Marine Macroalgae ◽  
Marmara Sea ◽  
Ecological Quality ◽  
Ecological Index ◽  
Pressure Index ◽  
Ecological Quality Status ◽  
Good Ecological Status ◽  
Negative Linear Relationship ◽  
Quality Status

In the present study, the Marine Floristic Ecological Index (MARFEI) was tested to assess the impacts by using marine benthic macrophytes and pressures by using the Macroalgae-Land Uses Simplified Index (MA-LUSI) in the Marmara Sea (Turkey). Sampling of benthic macrophytes was made from 0-5 m depth at 29 different sites during the summer periods of 2017, 2018 and 2019. The study revealed good ecological status class (ESC) for 6 sites, moderate for 11 sites, poor for 8 sites and bad for 4 sites. MARFEIeqr showed a negative linear relationship with the pressure index MA-LUSI.

scholarly journals Assessment of ecological quality status of Küçükçekmece Bay (Marmara Sea) by applying BENTIX, AMBI, BOPA and BO2A biotic indexes

2012 ◽  
Vol 13 (2) ◽  
pp. 198 ◽  
Author(s):  
S. CAGLAR ◽  
S. ALBAYRAK
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Marmara Sea ◽  
Ecological Quality ◽  
Ecological Quality Status ◽  
Proxy Measure ◽  
Quality Status

This study was carried out to explore the effectiveness of different biotic indexes in the Marmara Sea. The assessment of ecological quality status (EQS) was performed by applying the biotic indexes BENTIX, AMBI, BOPA, BO2A and Shannon-Wienerdiversity, in combination with the estimation of total organic carbon (TOC) content of sediments. BOPA and BO2A indexes tended to overestimate the EQS of the stations. BENTIX was the most efficient index as it demonstrated conceivable EQS results with respect to TOC load and successfuly determined “acceptable” or “not acceptable” status of the stations. TOC content of sediment, which significantly correlated with several benthic measures (S, N, AMBI, BENTIX), proved to be a valuable proxy measure in evaluating the likelihood of benthic impairment. When overall EQS of northern Marmara Sea was discussed, the region was designated as ecologically disturbed with only 25.7% of the stations in acceptable status.

scholarly journals Application of the bentix index in assessing ecological quality of hard substrata: a case study from the Bosphorus Strait, Turkey

2007 ◽  
Vol 8 (1) ◽  
pp. 15 ◽  
Author(s):  
E. KALKAN ◽  
S.U. KARHAN ◽  
E. MUTLU ◽  
N. SIMBOURA ◽  
M. BEKOLET
Keyword(s):  
Biotic Index ◽  
Ecological Quality ◽  
Ecological Quality Status ◽  
Significant Difference ◽  
Benthic Ecosystems ◽  
Bosphorus Strait ◽  
Sewage Discharges ◽  
Quality Status

In this paper, a biotic index (Bentix) has been used for the assessment of ecological quality status of shallow water hard substrate benthic ecosystems affected by coastal sewage discharges in the Bosphorus Strait. A significant difference was observed between the control and the discharge stations with regard to Bentix values (Mann-Whitney U Test, p=0.002) and ecological quality status of the discharge stations was worse than that of controls. The index values revealed that sewage discharges caused serious disturbance in macrozoobenthic communities in the area investigated. Although so far it has been used for soft bottom communities, Bentix (with some species scoring modifications) also appeared to work successfully in hard substrates, at least for the present study.

The ecological quality status of the Elbe estuary. A comparative approach on different benthic biotic indices applied to a highly modified estuary

2012 ◽  
Vol 19 ◽  
pp. 118-129 ◽  
Author(s):  
Markus A. Wetzel ◽  
Peter C. von der Ohe ◽  
Werner Manz ◽  
Jochen H.E. Koop ◽  
Dierk-Steffen Wahrendorf
Keyword(s):  
Comparative Approach ◽  
Ecological Quality ◽  
Biotic Indices ◽  
Elbe Estuary ◽  
Ecological Quality Status ◽  
Quality Status

scholarly journals The THE ECOLOGICAL QUALITY STATUS OF THE ORGANIC SHRIMP FARMING PONDS: USE OF A NEW BIOTIC INDICES

2018 ◽  
Vol 34 (2) ◽  
Author(s):  
Trần Thành Thái
Keyword(s):  
Farming Systems ◽  
Shrimp Farming ◽  
Food Sources ◽  
Biotic Index ◽  
Natural Food ◽  
Ecological Quality ◽  
Wet Season ◽  
Tropical Regions ◽  
Ecological Quality Status ◽  
Quality Status

In spite of the development and widespread dissemination of the model organic shrimp farming systems, the biological communities in the organic shrimp farming ponds have still very limited. Therefore, we conducted a field survey for macrobenthic communities (MC) of the Tam Giang‘s organic shrimp farming ponds (TGOSFP) located in Tam Giang commune, Nam Can district, Ca Mau province during three seasons in 2015 (March - dry, July - transfer and November - wet season). The results indicated that the MC have characterized by high density and slightly diversity that is a rich natural food sources for shrimp in the TGOSFP. Further more, the present study is a first attempt to use of new indices (AMBI - AZTI’s Marine Biotic Index) on MC for determining the ecological quality status of sediment (EcoQ) in the TGOSFP. The following results were also recorded with an undisturbed and slightly disturbed  EcoQ in the TGOSFP and the general EcoQ would likely be improved between three seasons. The success of AMBI for detecting EcoQ in Vietnam is specific to this study, but AMBI was likely to improved, in particular tropical regions.

Assessing the ecological quality status of transplanted mangrove wetland in the Oujiang estuary, China

2018 ◽  
Vol 133 ◽  
pp. 1-8 ◽  
Author(s):  
Chengye Hu ◽  
Bonian Shui ◽  
Wentao Li ◽  
Xiaolong Yang ◽  
Xiumei Zhang
Keyword(s):  
Ecological Quality ◽  
Mangrove Wetland ◽  
Ecological Quality Status ◽  
Quality Status
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