Seasonal dynamics of soft-bottom polychaetes in Izmir Bay (Aegean Sea, Eastern Mediterranean)

Ergen, Zeki; Çınar, Melih Ertan; Dağlı, Ertan; Kurt, Güley

doi:10.3989/scimar.2006.70s3197

Cited by 26 publications

(6 citation statements)

References 21 publications

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“…According to the D2 standard, vessels may only discharge ballast water that contains viable organism within specified limits (by treating ballast water) [145]. This might considerably decrease risks of species introductions via ballast water of ships, which was previously poured into sea near ports where tolerant introduced species can easily survive and establish [146,147].…”

Section: Managementmentioning

confidence: 99%

Current status (as of end of 2020) of marine alien species in Turkey

Çınar

Bilecenoğlu

Yokeş³

et al. 2021

PLoS ONE

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The 2020’s update of marine alien species list from Turkey yielded a total of 539 species belonging to 18 taxonomic groups, 404 of which have become established in the region and 135 species are casual. A total of 185 new alien species have been added to the list since the previous update of 2011. The present compilation includes reports of an ascidian species (Rhodosoma turcicum) new to the marine fauna of Turkey and range extensions of six species. Among the established species, 105 species have invasive characters at least in one zoogeographic region, comprising 19% of all alien species. Mollusca ranked first in terms of the number of species (123 species), followed by Foraminifera (91 species), Pisces (80 species) and Arthropoda (79 species). The number of alien species found in seas surrounding Turkey ranged from 28 (Black Sea) to 413 (Levantine Sea). The vectoral importance of the Suez Canal diminishes when moving from south to north, accounting for 72% of species introductions in the Levantine Sea vs. only 11% of species introductions in the Black Sea. Most alien species on the coasts of Turkey were originated from the Red Sea (58%), due to the proximity of the country to the Suez Canal. Shipping activities transported 39% of alien species, mainly from the Indo-Pacific area (20%) and the Atlantic Ocean (10%). Misidentified species (such as Pterois volitans, Trachurus declivis, etc.) and species those classified as questionable or cryptogenic were omitted from the list based on new data gathered in the last decade and expert judgements. The documented impacts of invasive species on socio-economy, biodiversity and human health in the last decade as well as the legislation and management backgrounds against alien species in Turkey are presented.

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Section: Managementmentioning

confidence: 99%

Current status (as of end of 2020) of marine alien species in Turkey

Çınar

Bilecenoğlu

Yokeş³

et al. 2021

PLoS ONE

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“…Nevertheless, it is necessary to specify that P. kefersteini is the most dominant species at the stations located at 3 m depth in Sinop. Apart from the dominant species, Alitta succinea, Schistomeringos rudolphii, Capitella teleta, H. filiformis, Spio decoratus, and Prionospio pulchra, which were recorded in the research area, were also previously reported as the first opportunistic indicator species of organic polluted ecosystems (Ergen et al, 2006;Çinar et al, 2015). Çinar et al (2015) developed a special benthic index for the Turkish seas (TUBI, TUrkish Benthic Index) and presented a species list with their ecological groups (GI: Sensitive; GII: Tolerant; GIII: Opportunistic).…”

Section: Discussionmentioning

confidence: 75%

“…Therefore, comparing the results of this work with studies done in other seas may not be illustrative. However, Ergen et al (2006) examined soft bottom polychaetes in İzmir Bay (Aegean Sea) and found that pollution, sediment structures, and water depth were the main factors affecting their distribution. Çinar et al (2012b) observed that increasing sand percentage in sediment significantly increased the number of species whereas the clay percentage in sediment negatively affected the community parameters in Mersin Bay (Mediterranean Sea).…”

Section: Discussionmentioning

confidence: 99%

Spatial and temporal variations of soft bottom polychaetes of Sinop Peninsula(southern Black Sea) with new records

Şahin¹,

Dağlı²,

Sezgi̇n³

2017

Turk J Zool

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IntroductionPolychaeta is one of the most diverse and abundant benthic groups in marine ecosystems: 12,632 species of polychaetes are reported in the world's oceans (Appeltans et al., 2012), while 1122 species are reported in the Mediterranean Sea (Coll et al., 2010) and 238 species in the Black Sea to date (Kurt Şahin and Çınar, 2012). The polychaetes distributed among the Turkish coasts were recently reported by Çınar et al. (2014) with 459 species from the coast of the Levantine Sea, 547 species from the coast of the Aegean Sea, 390 species from the coast of the Sea of Marmara, and 136 species from the Black Sea coast of Turkey.The Black Sea is a semiclosed sea and it is the largest (547,000 km 3 ) permanently stratified marine basin in the world (Zaitsev et al., 2002). It is connected to the Aegean region of the Mediterranean Sea by the narrowest strait of Turkey, the Bosphorus, to the south, and the Sea of Azov by the Strait of Kerch to the north. Nearly 87% of the Black Sea is entirely anoxic (without oxygen) and it contains high levels of hydrogen sulfide. Anoxic conditions occurring below 70 to 200 m limit the vertical distribution of organisms. The hydrographic regime is characterized by low salinity surface water of river origin overlying high salinity of deep water of Mediterranean origin (Bakan and Büyükgüngör, 2000). The structure of its ecosystem differs from that of the neighboring Mediterranean Sea in that species diversity is lower and the dominant organism groups are different. However, the abundance, total biomass, and productivity of the Black Sea are much higher than those in the Mediterranean Sea (Zaitsev and Alexandrov, 1998).The first studies concerning polychaetes in the Black Sea date back to the late 1800s (

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“…This modeling issue, resulting from mixing GLMs on all the parameters including the intercept, has been acknowledged in previous studies (Dunstan et al, 2013b;Hui et al, 2013) and may mask, to some degree, the strength of association of species based on shared responses. However, member species of archetype 1, such as Lumbrineris geldiay, Monticellina heterochaeta, Sigambra tentaculata, Aricidea claudiae have been reported to occur together and characterize transitional assemblages in previous studies of Izmir Bay (Dogan et al, 2005;Ergen et al, 2006;Çinar et al, 2012) and Edremit Bay (Albayrak et al, 2007) at locations that concur with the current distribution; it is hence believed that SA1 is a valid response group. Moreover, the absence of any second-order opportunists and the relative proportion of the other Ecological Groups would place it in the slightly to moderately disturbed conditions of a degradation model for benthic community health (see Borja et al, 2000;Simboura and Zenetos, 2002;Muxika et al, 2012).…”

Section: Discussionmentioning

confidence: 93%

Predicting the Composition of Polychaete Assemblages in the Aegean Coast of Turkey

2016

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Benthic infaunal species and communities have been extensively used to evaluate quality of the marine environment. Within the MSFD, community composition is addressed most commonly through Descriptor 6 (Seafloor integrity), criterion 6.2 (Condition of benthic communities). At the same time, the Directive has stipulations for addressing and assessing indicators linked with pressures in an explicitly spatial manner. At larger scales, achieving this through point sampling may be impractical or unfeasible; hence predictive methods are being increasingly employed to produce the large scale spatial data that are often required for marine spatial planning and management. The aim of the current work was to develop statistical and spatial modeling tools that can predict the distribution of soft-sediment benthic polychaetes in the Aegean coast of Turkey. To do that, we employed Species Archetype Models (SAMs), a novel analytical and modeling framework which uses mixture models to cluster species responses to the environment, producing a number of "archetypal" responses assumed to represent species with similar ecological/physiological tolerances. Polychaete presence/absence data were obtained from the literature and modeling was performed against environmental variables reflecting the main natural and anthropogenic gradients in the region. The resulting models are interpreted in light of the sensitivity/tolerance classification scheme for benthic invertebrates. Three Species Archetypes were identified through the analysis. In brief, Species Archetype 1 consists of the most prevalent species in the dataset and primarily follows the salinity and temperature gradients. Species Archetype 2, present in the central and southern Aegean, is dominated by sensitive and indifferent species and responds negatively to chlorophyll a, whereas Species Archetype 3 represents mostly tolerant and opportunistic polychaetes with increased probability of occurrence in eutrophic, shallow, inshore areas throughout the region. Predictive performance was constrained by the information contained in our data. These results from a limited data set show promise that SAMs as a modeling tool can offer valuable insights into patterns of benthic species distribution and coexistence and increase our capacity to provide predictive advice.

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Seasonal dynamics of soft-bottom polychaetes in Izmir Bay (Aegean Sea, Eastern Mediterranean)

Cited by 26 publications

References 21 publications

Current status (as of end of 2020) of marine alien species in Turkey

Current status (as of end of 2020) of marine alien species in Turkey

Spatial and temporal variations of soft bottom polychaetes of Sinop Peninsula(southern Black Sea) with new records

Predicting the Composition of Polychaete Assemblages in the Aegean Coast of Turkey

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