کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4528477 | 1324310 | 2007 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Epibiosis of Calpensia nobilis (Esper) (Bryozoa: Cheilostomida) on Posidonia oceanica (L.) Delile rhizomes: Effects on borer colonization and morpho-chronological features of the plant
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم آبزیان
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Shoots of the Mediterranean seagrass Posidonia oceanica (L.) Delile can be overgrown with a thick encrustation of the bryozoan Calpensia nobilis (Esper) (Chelostomida) particularly under high hydrodynamic conditions. We compared shoots with and without this encrustation and assessed whether it affected shoot morphology and production, and incidence of polychaete borers. The borers collected were represented by three species of polychaete Eunicidae (Lysidice ninetta, Lysidice collaris and Nematonereis unicornis). Shoots affected by overgrowth of C. nobilis showed a significantly lower borer frequency (17% versus 49%), lower values of both yearly biomass of the rhizome (mean 6.3Â mg/year in shoot with C. nobilis versus 8.3Â mg/year in shoot without) and biomass/elongation (B/E) ratio, and lower mean sheath thickness (0.25Â mm versus 0.30Â mm), while the mean width of the leaves was slightly higher (1.0Â mm versus 0.7Â mm). Significant Spearman coefficient's values were estimated between carbonate mass of C. nobilis and rhizome length, muff length and rhizome length, and maximum thickness of the muff and rhizome length. Plant and bryozoan morphometrics allowed to estimate between 5 and 10 years the colonization age of C. nobilis on the living shoots studied.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Aquatic Botany - Volume 86, Issue 1, January 2007, Pages 30-36
Journal: Aquatic Botany - Volume 86, Issue 1, January 2007, Pages 30-36
نویسندگان
Mariamichela Cigliano, Silvia Cocito, Maria Cristina Gambi,