A synthesis of the biological quality elements for the implementation of the European Water Framework Directive in the Mediterranean ecoregion: The case of Saronikos Gulf

Simboura, N.; Panayotidis, P.; Papathanassiou, E.

doi:10.1016/j.ecolind.2005.03.006

Cited by 157 publications

(82 citation statements)

References 9 publications

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“…The ecoregion concept was developed to describe landscape characteristics that influence regional patterns of aquatic and terrestrial resources (Omernik, 1987). Subsequently, many studies have used the ecoregion concept to interpret regional biological phenomena and ecosystem function Roth et al, 1996;Butcher et al, 2003;Simboura et al, 2005;Borja et al, 2007). However, there is often less correspondence between spatial patterns of biological communities and ecoregional classification (Whittier et al, 1988;Pan et al, 1999;Potapova and Charles, 2002), probably because of the greater impact of local geomorphic factors (e.g., habitat alteration and destruction, channel straightening, and river bed modification) and disturbance factors (e.g., pollution), which interact in a complicated manner (Biggs et al, 1990).…”

Section: Spatial Patterns Of Diatom Distributions: Implications For Bmentioning

confidence: 99%

Distribution of benthic diatoms in Korean rivers and streams in relation to environmental variables

Hwang

Kim

Yoon

et al. 2011

Ann. Limnol. - Int. J. Lim.

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-The diatoms are an ecologically important group of algae that have been extensively studied by ecologists and taxonomists. However, the large-scale patterns of diatom distribution and the factors underlying this distribution are largely unknown. The aims of this study were to identify the large-scale spatial patterns of benthic diatom assemblages in Korean streams and rivers, and to assess the importance of numerous environmental factors on diatom distribution. We classified 720 study sites based on diatom flora. Benthic diatoms, water chemistry, altitude, and riparian land cover and use were characterized by multivariate analyses, Monte Carlo permutation tests, and indicator species analysis. In total, we identified 531 diatom taxa. Diatom assemblages were mostly dominated by species of the genera Achnanthes, Navicula, Nitzschia, Cocconeis, Fragilaria (Synedra included), Cymbella, Gomphonema, and Melosira. Cluster analysis partitioned all 720 sites into eight groups based on diatom species composition. Canonical correspondence analysis indicated that altitude, land cover and use, current velocity, electrical conductivity, and nutrient levels explained a significant amount of the variation in the composition of assemblages of benthic diatoms. At the national scale, a downstream ecological gradient was apparent, from fast-flowing, mostly oligotrophic highland streams to slow-flowing, mostly eutrophic lowland rivers. Our data suggest that spatial factors explain some of the variation in diatom distribution. The present investigation of the spatial patterns of benthic diatoms, the ecological determinants of diatom occurrence, and the identification of diatom indicator species contributes to development of a program for assessing the biological integrity of lotic ecosystems in Korea.

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Section: Spatial Patterns Of Diatom Distributions: Implications For Bmentioning

confidence: 99%

Distribution of benthic diatoms in Korean rivers and streams in relation to environmental variables

Hwang

Kim

Yoon

et al. 2011

Ann. Limnol. - Int. J. Lim.

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“…AMBI (AZTI Marine Biotic Index) based on the study of [39], which considers five ecological groups ranging from sensitive species (EGI) to first-order opportunistic species (EGV) [43]. BENTIX considers only two groups: sensitive (GS) and tolerant species (GT), which correspond to ecological groups I and II, and to ecological groups III to V of the AMBI, respectively [44] [45]. The BO2A (Benthic Opportunistic Polychaete Amphipod index) is based on the ratio of opportunistic polychaetes (i.e.…”

Section: Biotic Indicesmentioning

confidence: 99%

Spatial and Temporal Structures of the Macrozoobenthos from the Intertidal Zone of the Kneiss Islands (Central Mediterranean Sea)

Mosbahi¹,

Pezy²,

Dauvin³

et al. 2016

OJMS

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The present study analyses the spatio-temporal variability of the macrozoobenthos from the intertidal zone of the Kneiss Islands (Gulf of Gabès, Tunisia). Samples were collected once from 34 stations, while seasonal variations were studied by sampling four times at 12 stations over the period 2013-2014. A total of 159 macrobenthos taxa associated with intertidal Zostera noltei beds are identified from the 34 stations, with a taxonomic dominance of crustaceans (32%), molluscs (29%) and annelids (27%). Abundance varies from 9244 to 36,844 ind·m −2 with a mean value of 14,346 ind·m −2 . Analysis of the trophic structure shows that the majority of stations are strongly represented by carnivores (41%), followed by the non-selective deposit feeders (16%). Cluster analysis and multidimensional scaling allow identification of three main benthic assemblages based on species abundance, corresponding to different sediment types and organic matter contents. The seasonal variability in abundance, diversity and community structure is mainly due to spring and summer recruitment. The biotic indices (i.e. AMBI, BO2A and BENTIX) show that the intertidal area of Kneiss Islands exhibits a good ecological status.

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“…This index is designed for the assessment of the impact caused by general stress factors and does not discriminate amongst natural and anthropogenic disturbances . It has been tested successfully in a variety of Hellenic benthic ecosystems (SIMBOURA; ZENETOS, 2002), in areas subject to organic pollution such as Athens and the Saronikos gulf (SIMBOURA et al, 2005), and to oil spills (ZENETOS et al, 2004). Currently it is undergoing testing in other Mediterranean areas within the Water Framework Directive intercalibration exercise (VINCENT et al, 2002;.…”

Section: Introductionmentioning

confidence: 99%

Performance comparison of biotic indices measuring the ecological status base on soft-bottom macroinvertebrates: a study along the shallow Gomishan lagoon (Southeast Caspian Sea)

et al. 2015

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This paper aims to test the suitability of some biotic indices for their application in Southeast Caspian Sea. For this purpose, the ecological quality of the Gomishan lagoon was assessed using three biotic indices (AMBI, BENTIX, BOPA) during summer and autumn 2010. The results from the application of the biotic indices do not highlight a clear distinction between the stations. The results show that two of the indices (AMBI and BENTIX) are very close in terms of diagnosis (good and high) and seem to generally perform better than BOPA. In addition, Principal Component Analysis (PCA) based on abiotic parameters showed clear spatial and temporal differences in environmental variables. However, at this shallow sites with low human pressure and high water residence times, such benthic community composition can be associated with physical stress due to salinity increase and to changes in environmental characteristics, triggered by conventional seasonal variations. Natural variability of transitional waters is a crucial factor for a correct evaluation of the ecological condition of macroinvertebrate communities across the lagoonal system. AbstrAct

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A synthesis of the biological quality elements for the implementation of the European Water Framework Directive in the Mediterranean ecoregion: The case of Saronikos Gulf

Cited by 157 publications

References 9 publications

Distribution of benthic diatoms in Korean rivers and streams in relation to environmental variables

Distribution of benthic diatoms in Korean rivers and streams in relation to environmental variables

Spatial and Temporal Structures of the Macrozoobenthos from the Intertidal Zone of the Kneiss Islands (Central Mediterranean Sea)

Performance comparison of biotic indices measuring the ecological status base on soft-bottom macroinvertebrates: a study along the shallow Gomishan lagoon (Southeast Caspian Sea)

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