التفاصيل البيبلوغرافية
| العنوان: |
Effect of shading imposed by the algae Chaeotomorpha linum loads on structure, morphology and physiology of the seagrass Cymodocea nodosa. |
| المؤلفون: |
Zribi, Imen1 (AUTHOR), Ellouzi, H.2 (AUTHOR), Mnasri, I.1 (AUTHOR), Abdelkader, N.1 (AUTHOR), Ben Hmida, A.1,3 (AUTHOR), Dorai, S.4 (AUTHOR), Debez, A.2 (AUTHOR), Charfi-Cheikhrouha, F.1 (AUTHOR), Zakhama-Sraieb, R.1,5 (AUTHOR) rim.zakhama@isbst.uma.tn |
| المصدر: |
Marine Environmental Research. Jun2023, Vol. 188, pN.PAG-N.PAG. 1p. |
| مصطلحات موضوعية: |
*POSIDONIA, *SEAGRASSES, *ALGAE, *TERRITORIAL waters, *PHOTOSYNTHETIC pigments, *SHOOTING (Sports), *PHYSIOLOGY |
| مصطلحات جغرافية: |
TUNISIA |
| مستخلص: |
In shallow coastal waters, seagrass and macroalgae occur together but under eutrophic conditions, bloom-forming algae can take over seagrasses causing an irreversible regime shift. Understanding the effect of macroalgae loads on seagrass meadows at an early stage can help prevent the loss of these ecosystems and the services they provide. In the present study, in situ experiments were conducted for 90 days in Bekalta (eastern coast of Tunisia) to assess the response of the seagrass Cymodocea nodosa when challenged with shading induced by filamentous macroalgae Chaetomorpha linum. Structural, morphological and physiological variables were regularly measured during the experiment. Shaded plants showed a sharp decline in shoot density, growth rate, and above-ground biomass, the impact being more pronounced on the physiological traits. Besides, shading by C. linum induced a significant increase in the contents of leaf photosynthetic pigments and phenolic compounds, whereas causing a decrease in soluble protein and sugar concentrations. Thus, shading imposed by C. linum loads appeared to induce a phoadpatative response in C. nodosa concomitant with carbon mobilization. [Display omitted] • Cymodocea nodosa' s physiological traits may indicate stress from Cymodocea nodosa' s physiological traits may indicate stress from chaetomorpha linum. • Morphology changes and photoadaptation help Cymodocea nodosa cope with C haetomorpha linum 's shading. • The harmful impact of Chaetomorpha linum on Cymodocea nodosa is mainly due to light limitation. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
Academic Search Index |
