NDLI: Illegal trawling and induced invasive algal spread as collaborative factors in a Posidonia oceanica meadow degradation

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Illegal trawling and induced invasive algal spread as collaborative factors in a Posidonia oceanica meadow degradation

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Illegal trawling and induced invasive algal spread as collaborative factors in a Posidonia oceanica meadow degradation

Content Provider	Springer Nature Link
Author	Kiparissis, Sotiris Fakiris, Elias Papatheodorou, George Geraga, Maria Kornaros, Michael Kapareliotis, Apostolos Ferentis, George
Copyright Year	2010
Abstract	Posidonia oceanica, a key seagrass species of the Mediterranean Sea, shows clear signs of regression throughout the Mediterranean and illegal trawling is recognized as one of the main causes. We examined the condition of a P. oceanica meadow in Alykes Bay (Zakynthos Island, western Greece), a typical Mediterranean littoral area where illegal trawling is common practice, in respect to the total area affected, and in terms of possible ecological substitution. A side scan sonar (SSS) survey of the seafloor provided an image of the condition of the meadow and biological sampling evaluated the ecological status in affected meadow areas. SSS images revealed that trawling has a serious effect on the meadow, with 11% of the vegetated area being abraded, and the affected areas were also found to be fully colonized by the invasive alga Caulerpa racemosa. Moreover, unusually high densities of the polychaete Sabella pavonina were detected in the affected areas among C. racemosa fronds. Recolonization by P. oceanica of the affected meadow areas that have been colonized by C. racemosa seems improbable considering the allelopathic interactions between the species, with the alga displaying phytotoxic properties through caulerpenyne production and deterioration of the sediment quality.
Starting Page	669
Ending Page	678
Page Count	10
File Format	PDF
ISSN	13873547
Journal	Biological Invasions
Volume Number	13
Issue Number	3
e-ISSN	15731464
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-09-18
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Posidonia oceanica Caulerpa racemosa var cylindracea Mediterranean Sea Colonization Side Scan Sonar Trawling Developmental Biology Ecology Plant Sciences Freshwater & Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology Ecology, Evolution, Behavior and Systematics

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Macrophyte assemblage associated with an invasive species exhibiting temporal variability in its development pattern

Invasive alga Caulerpa racemosa var. cylindracea makes a strong impact on the Mediterranean sponge Sarcotragus spinosulus

The indirect role of nutrients in enhancing the invasion of Caulerpa racemosa var cylindracea

Effects of mean intensity and temporal variability of disturbance on the invasion of Caulerpa racemosa var. cylindracea (Caulerpales) in rock pools

Effects of Caulerpa racemosa var. cylindracea on prey availability: an experimental approach to predation of amphipods by Thalassoma pavo (Labridae)

The role of disturbance in promoting the spread of the invasive seaweed Caulerpa racemosa in seagrass meadows

Invasion of alien macroalgae in different Mediterranean habitats

Neurotoxic effect of Caulerpa racemosa var. cylindracea by neurite inhibition on the neuroblastoma cell line

Colonization of Bryozoa on seagrass Posidonia oceanica ‘mimics’: biodiversity and recruitment pattern over time

Illegal trawling and induced invasive algal spread as collaborative factors in a Posidonia oceanica meadow degradation

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