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.

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.

Ecological quality status of coastal benthic ecosystems in the Sea of Marmara

2006 ◽  
Vol 52 (7) ◽  
pp. 790-799 ◽  
Author(s):  
Serhat Albayrak ◽  
Hüsamettin Balkis ◽  
Argyro Zenetos ◽  
Ayşegül Kurun ◽  
Cüneyt Kubanç
Keyword(s):  
Ecological Quality ◽  
Sea Of Marmara ◽  
Ecological Quality Status ◽  
Benthic Ecosystems ◽  
Quality Status

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 A A COMPARISON OF THE APPLICABILITY OF THE SHANNON-WIENER, AMBI AND M-AMBI INDEX FOR ASSESSING ECOLOGICAL QUALITY STATUS OF SEDIMENT IN AN ORGANIC SHRIMP FARMING PONDS, NAM CAN DISTRICT, CA MAU PROVINCE

2018 ◽  
Vol 34 (3) ◽  
Author(s):  
Tran Thanh Thai ◽  
Le Hai Dang ◽  
Ngo Xuan Quang
Keyword(s):  
Environmental Variables ◽  
Wiener Index ◽  
Shrimp Farming ◽  
Biotic Index ◽  
Ecological Quality ◽  
H Index ◽  
Ecological Quality Status ◽  
Quality Status

The Shannon-Wiener Index (H′), AZTI’s Marine Biotic Index (AMBI) and multivariate AMBI (M-AMBI) were applied as a comparative applicability in assessing the ecological quality status of sediment (EcoQ) of eight an organic shrimp farming ponds (OSFP), Ca Mau province. There were obvious differences between the evaluation results of three indices in the eight OSFPs through three seasons. The EcoQ given by the AMBI and M-AMBI were higher than that given by the H’ index. These indicated that H’ index may also be more sensitive to environment disturbances than the AMBI and M-AMBI. Furthermore, the EcoQ given by the M-AMBI was a neutralization between that given by the H’ and AMBI indices. Because there are no environmental variables data available in this study, the H′ index was really more sensitive to environment disturbances than the AMBI and M-AMBI, that have yet to be fully elucidated. A analyses three indices with environmental variables gradient data also need further investigation to potentially increase the precise answer of this issue.

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

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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