The benthic mucilage producing microalga Chrysophaeum taylorii Lewis and Bryan (Pelagophyceae) has recently received attention for its rapid spread in the Mediterranean Sea, where its blooms have remarkable detrimental effects. So far no information on C. taylorii response to multiple stressors, especially in terms of mucilage hyperproduction, is available in the literature yet, and a manipulative field experiment in this topic was designed in Tavolara Punta Coda Cavallo Marine Protected Area. The aim of the study was to test the effects of nutrient enrichment (addition of nutrients), mechanical disturbance (partial and total benthic organisms removal) and hydrodynamics (increased water turbulence) on C. taylorii cell density and mucilage abundance. To the purpose, the three above mentioned stressors were simulated and the three treatments were assigned to 20 × 20 cm plots following a full-factorial design (n = 3). Interactive effects of the three stressors affected significantly both benthic C. taylorii cell density and mucilage cover although differently. Mechanical disturbance and high hydrodynamics produced consistent effects on cell density and mucilage production (i.e. the former factor enhancing and the latter decreasing). Nutrient enrichment on the contrary led to contrasting effects, promoting cell abundance and inhibiting mucilage production. Therefore, important mucilage blooms are expected in oligotrophic sheltered coastal locations where barren areas are present.

Caronni, S., Calabretti, C., Cavagna, G., Ceccherelli, G., Delaria, M., Macri, G., et al. (2017). The invasive microalga Chrysophaeum taylorii: Interactive stressors regulate cell density and mucilage production. MARINE ENVIRONMENTAL RESEARCH, 129, 156-165 [10.1016/j.marenvres.2017.05.005].

The invasive microalga Chrysophaeum taylorii: Interactive stressors regulate cell density and mucilage production

Caronni S.
;
Calabretti C.;Delaria M. A.;
2017

Abstract

The benthic mucilage producing microalga Chrysophaeum taylorii Lewis and Bryan (Pelagophyceae) has recently received attention for its rapid spread in the Mediterranean Sea, where its blooms have remarkable detrimental effects. So far no information on C. taylorii response to multiple stressors, especially in terms of mucilage hyperproduction, is available in the literature yet, and a manipulative field experiment in this topic was designed in Tavolara Punta Coda Cavallo Marine Protected Area. The aim of the study was to test the effects of nutrient enrichment (addition of nutrients), mechanical disturbance (partial and total benthic organisms removal) and hydrodynamics (increased water turbulence) on C. taylorii cell density and mucilage abundance. To the purpose, the three above mentioned stressors were simulated and the three treatments were assigned to 20 × 20 cm plots following a full-factorial design (n = 3). Interactive effects of the three stressors affected significantly both benthic C. taylorii cell density and mucilage cover although differently. Mechanical disturbance and high hydrodynamics produced consistent effects on cell density and mucilage production (i.e. the former factor enhancing and the latter decreasing). Nutrient enrichment on the contrary led to contrasting effects, promoting cell abundance and inhibiting mucilage production. Therefore, important mucilage blooms are expected in oligotrophic sheltered coastal locations where barren areas are present.
Articolo in rivista - Articolo scientifico
Algal blooms; Cell density; Chrysophaeum taylorii; Interactive effects; Mediterranean sea; Mucilage cover; Multiple stressors;
English
2017
129
156
165
reserved
Caronni, S., Calabretti, C., Cavagna, G., Ceccherelli, G., Delaria, M., Macri, G., et al. (2017). The invasive microalga Chrysophaeum taylorii: Interactive stressors regulate cell density and mucilage production. MARINE ENVIRONMENTAL RESEARCH, 129, 156-165 [10.1016/j.marenvres.2017.05.005].
File in questo prodotto:
File Dimensione Formato  
Caronni-2017-Marine Environmental Research-VoR.pdf

Solo gestori archivio

Tipologia di allegato: Publisher’s Version (Version of Record, VoR)
Licenza: Tutti i diritti riservati
Dimensione 1.14 MB
Formato Adobe PDF
1.14 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/487899
Citazioni
  • Scopus 8
  • ???jsp.display-item.citation.isi??? 8
Social impact