2026-04-17T02:01:11Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1330872025-12-05T09:43:07Zcom_2072_1057col_2072_478778col_2072_478909col_2072_478917

00925njm 22002777a 4500 dc Wangensteen Fuentes, Owen S. (Simon) author Cebrian Pujol, Emma author Palacín Cabañas, Cruz author Turon Barrera, Xavier author 2019-05-13T14:18:51Z 2020-02-28T06:10:17Z 2018-02 2019-05-13T14:18:51Z We analysed with multigene (18S and COI) metabarcoding the effects of the proliferation of invasive seaweeds on rocky littoral communities in two Spanish Marine Protected Areas. The invasive algae studied were Caulerpa cylindracea, Lophocladia lallemandii and Asparagopsis armata. They are canopy-forming, landscape-dominant seaweeds, and we were interested in their effects on the underlying communities of meiobenthos and macrobenthos, separated in two size fractions through sieving. A new semiquantitative treatment of metabarcoding data is introduced. The results for both markers showed that the presence of the invasive seaweed had a significant effect on the understory communities for Lophocladia lallemandii and Asparagopsis armata but not for Caulerpa cylindracea. Likewise, changes in MOTU richness and diversity with invasion status varied in magnitude and direction depending on the alga considered. Our results showed that metabarcoding allows monitoring of the less conspicuous, but not least important, effects of the presence of dominant invasive seaweeds. Plantes invasores Àrees marines protegides Indicadors biològics Invasive plants Marine protected areas Indicators (Biology) Under the canopy: community-wide effects of invasive algae in marine protected areas revealed by metabarcoding