Does the invasive macro-algae Sargassum muticum (Yendo) Fensholt, 1955 offer an appropriate temporary habitat for mobile fauna including non indigenous species?

An Update of Amphipoda Checklist for the English Channel

“…**: new species for the EC since 1999 checklist. (1) FWEC: French side of the Western English Channel [1,4,16] (2) EWEC: English side of the Western English Channel [1,3,5,17,18] (3) NBG: Normano-Breton Gulf [1,9,11,13,14,19,20] (4) BS: Bay of Seine [1,12] and MABES dataset (https://www.seine-aval.fr/publication (accessed on 1 June 2022)) (5) CEC: Central English Channel [8,21,22] (6) Wight: [3,17,23] (7) EEEC: English side of the Eastern English Channel [3,18,24,25] (8) FEEC: French side of the Eastern English Channel [1,7,10,[24][25][26][27][28] All the species were checked against the WORMS database of amphipods on 31 May 2022 (https://www.marinespecies.org (accessed on 3 June 2022)). The families and species are ordered alphabetically within the families, and the species are ordered alphabetically with the genera.…”

“…Ten species are newly reported in the Bay of Seine zone: Ampithoe valida S.I. Smith, 1873, in Sargassum muticum macroalgae at Saint-Vaast La-Hougue [13]; Aoroides longimerus Ren & Zheng, 1996, and Aoroides semicurvatus Ariyama, 2004, in the harbour of Saint-Vaast-La-Hougue and Le Havre [9]; Caprella mutica Schurin, 1935, in the harbour of Le Havre; Grandidierella japonica Stephensen, 1938, along the coast of Calvados and near the Isle of Wight [12,23]; Chelicorophium curvispinum (G.O. Sars, 1895) in the lower part of the Seine estuary [85]; and Dikerogammarus villosus (Sowinsky, 1894), Cryptorchestia cavimana (Heller, 1865), and Platorchestia platensis (Krøyer, 1845) in the Seine estuary or the harbour basin of Le Havre [12].…”

“…Smith, 1873, Caprella mutica Schurin, 1935, Chelicorophium curvispinum (G.O. Sars, 1895), Dikerogammarus villosus (Sowinsky, 1894), Grandidierella japonica Stephensen, 1938, and Ptilohyale littoralis (Stimpson, 1853) [9,10,12,13,17,23,47,84,[87][88][89]. Four other species have been known in the EC for several decades: Cryptorchestia cavimana (Heller, 1865) since 1959 in the Seine estuary, Monocorophium acherusicum (Costa, 1853), reported in 1965, Monocorophium sextonae (Crawford, 1937) reported in 1976 in the Bay of Seine, and Platorchestia platensis (Krøyer, 1845) reported in the same zone at the beginning of the 1990s in Normandy [89].…”

“…More than 20 years ago, a checklist of amphipods recorded in the English Channel (EC) was published by [1]. It was based on data from [2,3], inventories of amphipods drawn up by the marine stations of Roscoff [4], Plymouth [5], and Wimereux [6], as well as numerous articles focused on amphipods or the marine fauna in several parts of the EC [7][8][9][10][11][12][13]. Moreover, Ref.…”

Applications of Antioxidant Secondary Metabolites of Sargassum spp.

“…Blooms of these holopelagic species are one of such cases that negatively affect the near-shore seagrass communities, coral colonies, and fauna, ultimately generating socioeconomical problems [ 2 , 4 ]. Sargassum muticum , introduced in the north-east Atlantic along the European coasts in the 1970s, is considered one of the most invasive seaweeds in Europe, capable of forming dense beds, replacing native seaweeds [ 5 ], and negatively affecting oyster farming and tourism in regions such as Normandy [ 6 ]. In turn, in some countries, such as Spain and Portugal, these seaweeds have been considered by some authors as an addition to the algal flora, rather than a threat [ 7 , 8 ], positively impacting the diversity of motile fauna and constituting a potential source of food for fish and cephalopod species [ 6 ].…”