期刊
MARINE POLLUTION BULLETIN
卷 128, 期 -, 页码 318-323出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2018.01.034
关键词
ALEX; Biological invasions; Biotic indices; Ecological quality; Macroalgae
资金
- Desertificazione marina da sovrappascolo di ricci: indagine sulla transizione di stadi stabili bentonici alternativi project - P.O.R. SARDEGNA F.S.E. Obiettivo competitivita regionale e occupazione, Asse IV Capitale umano, Linea di Attivita 1.3.1 [C.U.P. E85E120000060009]
A modified version of the ALien Biotic IndEX (ALEX) has been recently proposed to evaluate biological invasions in macroalgal assemblages. ALEX was applied in a Marine Protected Area where a recreational-fishing port is present testing the following hypotheses: ALEX increases with the distance from the port, it changes between the two directions off the port and it changes among three different habitats: Cystoseira beds, algal turf and dead matte of the seagrass Posidonia oceanica. A total of 78 native macroalgal taxa and 4 introduced species were found, the Chlorophyta Caulerpa cylindracea and the Rhodophyta Apoglossum gregariwn, Acrothamnion preissii and Womersleyella setacea. All study sites were in high quality status highlighting that the assemblages investigated were at an early stage of NIS invasion. However, ALEX detected different values among conditions and habitats within the MPA, suggesting a local dynamics of NIS spread and different resistance to invasion of the investigated habitats.
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