Synedropsis abuflosensis sp. nov., a New Araphid Diatom (Bacillariophyceae) from the Shatt Al-Arab River, Southern Iraq

Al-Handal, Adil Y.; Al-Shaheen, Maitham A.; Al-Saedy, Rehab; Wulff, Angela

doi:10.5252/cryptogamie-algologie2022v43a2

Cited by 2 publications

(1 citation statement)

References 17 publications

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“…Furthermore, the grazing activity gastropods species and the filter feeding of the bivalve C. fluminalis, are dependent on the benthic, epiphytic and the planktonic diatoms in the habitats. The diatoms of Shatt Al-Arab are a mixture of seawater, estuarine and freshwater assemblages (Al-Handal, 2009) and in any aquatic ecosystem the ratio of each component is a function of the salinity gradient (Snceijs and Weckkström, 2010; Potapore, 2011). One of the most important results on many world's estuaries concerns the effect of seawater intrusion on the macrobenthic fauna is the shifting of their spatial distribution to further upstream (Fujii, 2012;Elliot and David, 2017).…”

Section: Annelidsmentioning

confidence: 99%

Macro-invertebrates response to acute salinity changes in the Shatt Al-Arab River system, Southern Iraq

Mohammed

Ahmed

Al-Taei

et al. 2021

IJAQ

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The stress of acute salinity increase on the life of macro-invertebrates in Shatt Al-Arab River system were investigated based on their abundance estimation acute salinity increase during the year 2018,where the salinity of the River at central, Basrah City became above 5 ppt and reached up to 25 ppt. Review work was done to determine the sizes and densities of the species during the normal conditions in past decades (1975-1995). The results of observations, photography and semi-quantitative sampling which were taken during many visits in the years 2012, 2015, 2016, 2016, 2017, 2018, 2019 and 2020 at Al-Salhia, Abo Al-Kassib, Al-Garmma and Al-Gurnah, were expressed in an ordinal six abundant scales (SACFOR), modified for species sizes and densities. All the species were have superabundance or common scale during the period 1975-1995, whereas at 2018-2020 the abundance of all species except M. affinis, were declined in general, 7 species were absent and 3 more were rare. The amphipods Parhyale basrensis, Platorchestia monodi, the isopod Sphaeroma annandalei and the annelid Namalycastis indica were commonly or frequently found at good state indicating their ability to resist the mesohaline conditions, the euryhaline species M. affinis and B. amphitrite weren’t affected. The study concluded that, in case of long term mesohaline conditions, most of the estuarine macro-invertebrates will be unable to persist and may be shifting to the upper reaches of the River.

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Section: Annelidsmentioning

confidence: 99%

Macro-invertebrates response to acute salinity changes in the Shatt Al-Arab River system, Southern Iraq

Mohammed

Ahmed

Al-Taei

et al. 2021

IJAQ

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Comparison of the biodiversity of epiphytic diatoms in the Euphrates-Tigris rivers using morphological and metabarcoding analyses

Mohamad,

Schimani,

Al-Shaheen

et al. 2024

MBMG

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The Euphrates-Tigris catchment area is one of the major drainage basins in the Middle East but climate change, overuse of waters and subsequent salinization has brought this region to the brink of ecological devastation. The aim of this study was to investigate the biodiversity of epiphytic diatoms in Iraq, for the first time using a combination of morphological and metabarcoding methods. 47 samples were collected at six sampling sites along the Rivers Tigris and Euphrates in northern Basra, Southern Iraq, during the summer of 2019 (dry season) and winter of 2020 (rainy season). The composition of the epiphytic diatoms in each sample was compared with both methods. The microscopic-morphological analysis of the environmental samples resulted in the identification of 284 infrageneric taxa in 59 genera. For the metabarcoding analysis the V4 region of the 18S marker gene was used and resulted in 1454 ASVs (Amplicon sequence variants) comprising 54 genera and 108 species with several ASVs belonging to the same taxa. The non-metric multidimensional scaling (NMDS) plots for morphology showed a clear seasonal effect in the diatom community composition, while the NMDS plots for 18SV4 analyses did not show a seasonal effect in community composition for the same samples. The incomplete taxonomic reference database for the studied sites turned out to be the major limitation of the molecular approach. Nevertheless, the combination of morphological and molecular methods increased the detection and identification of the diatom assemblages and laid the foundation for understanding their biodiversity in this region.

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Synedropsis abuflosensis sp. nov., a New Araphid Diatom (Bacillariophyceae) from the Shatt Al-Arab River, Southern Iraq

Cited by 2 publications

References 17 publications

Macro-invertebrates response to acute salinity changes in the Shatt Al-Arab River system, Southern Iraq

Macro-invertebrates response to acute salinity changes in the Shatt Al-Arab River system, Southern Iraq

Comparison of the biodiversity of epiphytic diatoms in the Euphrates-Tigris rivers using morphological and metabarcoding analyses

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