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

Download

12132-24466-1-PB.pdf

Date

2007-6-1

Author

KALKAN, E.
KARHAN, S.U.
MUTLU, E.
SIMBOURA, N.
BEKOLET, M.

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

267
views

137
downloads

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.

Subject Keywords

Environmental Engineering, Aquatic Science, Ecology, Evolution, Behavior and Systematics, Oceanography, Benthos, Hard substrates, Sewage discharge, Biotic index, Ecological quality, Bosphorus Strait

URI

https://hdl.handle.net/11511/50900

Journal

Mediterranean Marine Science

DOI

https://doi.org/10.12681/mms.160

Collections

Graduate School of Marine Sciences, Article

Suggestions

OpenMETU
Core

Comparison of phosphorus reduction alternatives in control of nutrient concentrations in Lake Uluabat (Bursa, Turkey): Partial versus full sediment dredging YENİLMEZ, Firdes; Aksoy, Ayşegül (2013-01-01) In this study, Water Quality Analysis Simulation Program (WASP) was used to simulate the impacts of various phosphorus (P) load reduction scenarios on nutrient concentrations in Lake Uluabat, a Ramsar site (a wetland of international importance designated under the Ramsar Convention), including sediment dredging options and source reduction. The model was calibrated for various water constituents including ortho-phosphate (PO43-) and nitrate (NO3-). The calibrated model was used as a management tool to pred...
Modeling biogeochemical dynamics in porous media: Practical considerations of pore scale variability, reaction networks, and microbial population dynamics in a sandy aquifer King, E. L.; Tuncay, Kağan; Ortoleva, P.; Meile, C. (Elsevier BV, 2010-03-01) Prediction of the fate and environmental impacts of groundwater contaminants requires the identification of relevant biogeochemical processes and necessitates the macroscopic representation of microbial activity occurring at the microscale. Using a well-studied sandy aquifer environment, we evaluate the importance of pore distribution on organic matter respiration in a porous medium environment by performing spatially explicit simulations of microbial metabolism at the sub-millimeter scale. Model results us...
Parameterization of iron and manganese cycling in the Black Sea suboxic and anoxic environment Konovalov, S; Samodurov, A; Oguz, T; Ivanov, L (Elsevier BV, 2004-12-01) New and published data on the distribution and speciation of manganese and iron in seawater are analyzed to identify and parameterize major biogeochemical processes of their cycling within the suboxic (similar to15.6less than or equal tosigma(t)less than or equal tosimilar to16.2) and anoxic layers (sigma(t)less than or equal tosimilar to16.2) of the Black Sea. A steady-state transport-reaction model is applied to reveal layering and parameterize kinetics of redox and dissolution/precipitation processes. Pr...
Particulate and dissolved primary production along a pronounced hydrographic and trophic gradient (Turkish Straits System-NE Aegean Sea) Lagaria, A.; Psarra, S.; Gogou, A.; Tuğrul, Selen; Christaki, U. (Elsevier BV, 2013-06-01) The rates of particulate (PPp) and dissolved primary production (PPd) were estimated along a trajectory of variable environmental regimes formed in a narrow shelf area, following the course of Black Sea water masses (BSW) passing through the Turkish Straits System (TSS) into the NE Aegean Sea (BS-AS outflow). Seven stations in total were sampled, covering a transect from the eastern edge of the Marmara Sea basin to the NE Aegean Sea, during two consecutive cruises performed in October 2008 within the framew...
Simulation of streamflow using hydrologic modeling system HEC-HMS Erşahin, Berkan.; Kentel Erdoğan, Elçin; Department of Earth System Science (2020) Basin models are fundamental for water resources assessment, analyzing quality and quantity of streamflow, managing water distribution systems, protecting and developing groundwater systems, flood protection, and water-supply forecasting. The integration of all hydrologic processes with their interconnections to each other at the basin scale is required for basin models. Mathematical basin models such as HEC-HMS are used for simulating hydrological processes in basin-scale to understand basin response to st...

Citation Formats

E. KALKAN, S. U. KARHAN, E. MUTLU, N. SIMBOURA, and M. BEKOLET, “Application of the bentix index in assessing ecological quality of hard substrata: a case study from the Bosphorus Strait, Turkey,” Mediterranean Marine Science, 2007, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/50900.