title: Carry over effects of nutrient addition on the recovery of an invasive seaweed from the winter die-back.
abstract: Nutrient enrichment of coastal waters can enhance the invasibility and regrowth of non-native species. The invasive alga Caulerpa cylindracea has two distinct phases: a well-studied fast-growing summer phase, and a winter latent phase. To investigate the effects of nutrient enrichment on the regrowth of the seaweed after the winter resting-phase, a manipulative experiment was carried out in intertidal rockpools in the North-western Mediterranean. Nutrients were supplied under different temporal regimes: press (constant release from January to May), winter pulse (January to March) and spring pulse (March to May). Independently from the temporal characteristics of their addition, nutrients accelerated the re-growth of C. cylindracea after the winter die-back, resulting in increased percentage covers at the peak of the growing season. Nutrient addition did not influence the number and length of fronds and the biomass. Native components of the algal community did not respond to nutrient additions. Our results show that nutrient supply can favour the spread of C. cylindracea even when occurring at a time of the year at which the seaweed is not actively growing.
authors.affiliation: Dipartimento di Biologia, Università di Pisa, Via Derna 1, 56126 Pisa, Italy; Centre for Marine Bio-Innovation, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney 2052, Australia. Electronic address: m.uyayrayzoz@studenti.unipi.it.
authors.forename: Marc
authors.initials: M
authors.lastname: Uyà
authors.affiliation: Dipartimento di Biologia, Università di Pisa, Via Derna 1, 56126 Pisa, Italy; CoNISMa, Consorzio Nazionale Interuniversitario per le Scienze del Mare, Piazzale Flaminio 9, 00196 Roma, Italy.
authors.forename: Elena
authors.initials: E
authors.lastname: Maggi
authors.affiliation: Dipartimento di Biologia, Università di Firenze, Via Micheli 1, 50121 Firenze, Italy.
authors.forename: Giovanna
authors.initials: G
authors.lastname: Mori
authors.affiliation: Dipartimento di Biologia, Università di Firenze, Via Micheli 1, 50121 Firenze, Italy.
authors.forename: Caterina
authors.initials: C
authors.lastname: Nuccio
authors.affiliation: Centre for Marine Bio-Innovation, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney 2052, Australia.
authors.forename: Paul E
authors.initials: PE
authors.lastname: Gribben
authors.affiliation: Dipartimento di Biologia, Università di Pisa, Via Derna 1, 56126 Pisa, Italy; CoNISMa, Consorzio Nazionale Interuniversitario per le Scienze del Mare, Piazzale Flaminio 9, 00196 Roma, Italy.
authors.forename: Fabio
authors.initials: F
authors.lastname: Bulleri
mesh_terms: D046068:Caulerpa / Q000502:physiology*; D017753:Ecosystem; D004784:Environmental Monitoring; D009584:Nitrogen / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D012621:Seasons; D012624:Seaweed / Q000502:physiology*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D014874:Water Pollutants, Chemical; D010758:Phosphorus; D009584:Nitrogen
keywords: Biomass; Carry-over effects; Caulerpa cylindracea; Growth; Invasive species; Nutrient enrichment; Pulse versus press disturbance; Rockpools; Seaweeds