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Molecular Phylogeny and Ecology of Textularia agglutinans d'Orbigny from the Mediterranean Coast of Israel: A Case of a Successful New Incumbent.

Merkado G, Titelboim D, Hyams-Kaphzan O, Holzmann M, Pawlowski J, Almogi-Labin A, Abdu U, Herut B, Abramovich S - PLoS ONE (2015)

Bottom Line: These results indicate that modern population of T. agglutinans found on the Mediterranean coast of Israel is probably Lessepsian.Our study also reveals that T. agglutinans has an epiphytic life mode, which probably enabled its successful colonization of the hard bottom habitats, at the Mediterranean coast of Israel, which consist of a diverse community of macroalgae.Our study further indicates that the species does not tolerate high SST (> 35°C), which will probably prevent its future expansion in the easternmost Mediterranean in light of the expected rise in temperatures.

View Article: PubMed Central - PubMed

Affiliation: Ben Gurion University of the Negev, Beer Sheva, Israel.

ABSTRACT
Textularia agglutinans d'Orbigny is a non-symbiont bearing and comparatively large benthic foraminiferal species with a widespread distribution across all oceans. In recent years, its populations have considerably expanded along the Israeli Mediterranean coast of the eastern Levantine basin. Despite its exceptionally widespread occurrence, no molecular data have yet been obtained. This study provides the first ribosomal DNA sequences of T. agglutinans complemented with morphological and ecological characterization, which are based on material collected during environmental monitoring of the hard bottom habitats along the Israeli Mediterranean coast, and from the Gulf of Elat (northern Red Sea). Our phylogenetic analyses reveal that all specimens from both provinces belong to the same genetic population, regardless their morphological variability. These results indicate that modern population of T. agglutinans found on the Mediterranean coast of Israel is probably Lessepsian. Our study also reveals that T. agglutinans has an epiphytic life mode, which probably enabled its successful colonization of the hard bottom habitats, at the Mediterranean coast of Israel, which consist of a diverse community of macroalgae. Our study further indicates that the species does not tolerate high SST (> 35°C), which will probably prevent its future expansion in the easternmost Mediterranean in light of the expected rise in temperatures.

No MeSH data available.


Measurements of angle of flaring as a function of test length.At early growth stage the chambers increase in size (width) rapidly while at later stages the chambers size stop increasing.
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pone.0142263.g010: Measurements of angle of flaring as a function of test length.At early growth stage the chambers increase in size (width) rapidly while at later stages the chambers size stop increasing.

Mentions: The most notable morphological variations among the examined material include differences in juvenile and adult flaring angles, test’s length, and degree of suture’s depression. The maximum length, width and the angle of flaring of the juvenile and adult stage were measured for 115 specimens of T. agglutinans from all sampling stations. The angle of flaring of the adult stage was measured between the first chamber and the periphery of the last two chambers in the widest position (see Fig 10 inset). The length and width of the collected specimens (juveniles and adults) vary between 480 μm– 2459 μm (average 1393.5 ±483 μm) and 402 μm– 1437 μm (average 913 ±264 μm) respectively. The length: width ratio varies between 0.97 and 2.93 with an average of 1.41 ±0.28 (Fig 11) which remains similar throughout ontogeny. [7] Reported a length:width ratio in the range of 2.1–2.6 for specimens from the Gulf of Aqaba-Elat (Red Sea), which is within the range we measured from the Mediterranean specimens. The variability of the length:width ratios observed in our specimens was found to be considerably larger than that measured by [7].


Molecular Phylogeny and Ecology of Textularia agglutinans d'Orbigny from the Mediterranean Coast of Israel: A Case of a Successful New Incumbent.

Merkado G, Titelboim D, Hyams-Kaphzan O, Holzmann M, Pawlowski J, Almogi-Labin A, Abdu U, Herut B, Abramovich S - PLoS ONE (2015)

Measurements of angle of flaring as a function of test length.At early growth stage the chambers increase in size (width) rapidly while at later stages the chambers size stop increasing.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4634767&req=5

pone.0142263.g010: Measurements of angle of flaring as a function of test length.At early growth stage the chambers increase in size (width) rapidly while at later stages the chambers size stop increasing.
Mentions: The most notable morphological variations among the examined material include differences in juvenile and adult flaring angles, test’s length, and degree of suture’s depression. The maximum length, width and the angle of flaring of the juvenile and adult stage were measured for 115 specimens of T. agglutinans from all sampling stations. The angle of flaring of the adult stage was measured between the first chamber and the periphery of the last two chambers in the widest position (see Fig 10 inset). The length and width of the collected specimens (juveniles and adults) vary between 480 μm– 2459 μm (average 1393.5 ±483 μm) and 402 μm– 1437 μm (average 913 ±264 μm) respectively. The length: width ratio varies between 0.97 and 2.93 with an average of 1.41 ±0.28 (Fig 11) which remains similar throughout ontogeny. [7] Reported a length:width ratio in the range of 2.1–2.6 for specimens from the Gulf of Aqaba-Elat (Red Sea), which is within the range we measured from the Mediterranean specimens. The variability of the length:width ratios observed in our specimens was found to be considerably larger than that measured by [7].

Bottom Line: These results indicate that modern population of T. agglutinans found on the Mediterranean coast of Israel is probably Lessepsian.Our study also reveals that T. agglutinans has an epiphytic life mode, which probably enabled its successful colonization of the hard bottom habitats, at the Mediterranean coast of Israel, which consist of a diverse community of macroalgae.Our study further indicates that the species does not tolerate high SST (> 35°C), which will probably prevent its future expansion in the easternmost Mediterranean in light of the expected rise in temperatures.

View Article: PubMed Central - PubMed

Affiliation: Ben Gurion University of the Negev, Beer Sheva, Israel.

ABSTRACT
Textularia agglutinans d'Orbigny is a non-symbiont bearing and comparatively large benthic foraminiferal species with a widespread distribution across all oceans. In recent years, its populations have considerably expanded along the Israeli Mediterranean coast of the eastern Levantine basin. Despite its exceptionally widespread occurrence, no molecular data have yet been obtained. This study provides the first ribosomal DNA sequences of T. agglutinans complemented with morphological and ecological characterization, which are based on material collected during environmental monitoring of the hard bottom habitats along the Israeli Mediterranean coast, and from the Gulf of Elat (northern Red Sea). Our phylogenetic analyses reveal that all specimens from both provinces belong to the same genetic population, regardless their morphological variability. These results indicate that modern population of T. agglutinans found on the Mediterranean coast of Israel is probably Lessepsian. Our study also reveals that T. agglutinans has an epiphytic life mode, which probably enabled its successful colonization of the hard bottom habitats, at the Mediterranean coast of Israel, which consist of a diverse community of macroalgae. Our study further indicates that the species does not tolerate high SST (> 35°C), which will probably prevent its future expansion in the easternmost Mediterranean in light of the expected rise in temperatures.

No MeSH data available.