Journal Article10.1016/J.ECSS.2008.05.009
Comparison between epiphyte assemblages of leaves and rhizomes of the seagrass Posidonia oceanica subjected to different levels of anthropogenic eutrophication
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TL;DR: Species composition and abundance of epiphyte assemblages seemed suitable for detecting moderate nutrient increases, even if adequate sampling designs are needed to separate patterns related to the large natural spatial variability of these systems from those related to changes in environmental conditions.
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Abstract: This paper aimed to compare epiphyte assemblages of leaves and rhizomes of Posidonia oceanica exposed to different levels of concentration of nutrients. The same design including a potentially impacted meadow and two reference meadows was used in each of two locations, characterized by the presence of a city or of suspended cages of a fish farm, respectively. This allowed to test for the consistency of responses of epiphytic assemblages to different sources of eutrophication. In both studies, results documented differences in patterns of composition and abundance of epiphytic assemblages on leaves between disturbed and reference meadows, while assemblages on rhizomes did not appear sensitive to this kind of disturbance. Moreover, in potentially impacted meadows, both assemblages showed different patterns of spatial variability compared to reference assemblages. Species composition and abundance of epiphyte assemblages seemed suitable for detecting moderate nutrient increases, even if adequate sampling designs are needed to separate patterns related to the large natural spatial variability of these systems from those related to changes in environmental conditions.
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Citations
Variability in the structure of epiphytic assemblages of Posidonia oceanica in relation to human interferences in the Gulf of Gabes, Tunisia.
Mounir Ben Brahim,Asma Hamza,Imen Hannachi,Ahmed Rebai,Othman Jarboui,Abderrahmen Bouain,Lotfi Aleya +6 more
TL;DR: It is revealed that the diversity is reduced in disturbed locations by the loss of biomass and the mean percentage cover, explained by means of a multiple-stressor model which plays an important role in the macro-epiphytes' setting.
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Settlement pattern of Posidonia oceanica epibionts along a gradient of ocean acidification: an approach with mimics
TL;DR: A profound difference in epiphyte communities in low pH conditions suggests cascading effects on the food web of the meadow and, consequently, on the functioning of the system.
Epiphyte assemblages of the Mediterranean seagrass Posidonia oceanica: an overview
TL;DR: The epiphytes of both leaves and rhizomes of Posidonia oceanica, the main seagrass found in the Mediterranean Sea, demonstrate a gradient of dissimilarity from west to east, with the eastern area being the most unlike the others.
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Variability in the structure of epiphytic assemblages of the Mediterranean seagrassPosidonia oceanicain relation to depth
TL;DR: In this article, a hierarchical sampling design was used to compare epiphytic assemblages at two different depths (10 and 20m) in terms of both species composition and abundance and patterns of spatial variability in the Mediterranean seagrass Posidonia oceanica.
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Effects of nutrient enrichment on macroalgal coralligenous assemblages.
TL;DR: Results highlighted the role played by nutrients in determining the structure of macroalgal coralligenous assemblages, furthermore suggesting possible synergetic effects with other kinds of disturbances.
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