TY - JOUR
T1 - Effect of UV-radiation on the physiology of the invasive green seaweed Codium fragile and its associated bacteria
AU - Rothäusler, Eva
AU - Dobretsov, Sergey
AU - Gómez, María Fernanda
AU - Jofré-Madariaga, David
AU - Thiel, Martin
AU - Véliz, Karina
AU - Tala, Fadia
N1 - Funding Information:
This research was supported by PAI 79160069 to FT, ANID - FONDECYT 1190954 to MT, and PCI- CONICYT MEC80180063 to FT for collaborative research with SD. S.D's work was supported by SQU grant [ IG/AGR/FISH/18/02 ] and the TRC project [ RC/AGR/FISH/16/01 ].
Funding Information:
This research was supported by PAI 79160069 to FT, ANID-FONDECYT 1190954 to MT, and PCI-CONICYT MEC80180063 to FT for collaborative research with SD. S.D's work was supported by SQU grant [IG/AGR/FISH/18/02] and the TRC project [RC/AGR/FISH/16/01].
Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/9
Y1 - 2022/9
N2 - Invasive species such as seaweeds often have a broad tolerance, allowing them to colonize novel habitats. During invasion, also new epibacteria can be formed on seaweeds, which have important chemo-ecological effects. Since UV-radiation (UVR) is one of the main factors affecting seaweeds and their epibacteria, we tested its effect on intertidal and subtidal thalli of the invasive seaweed Codium fragile from three sites and monitored photosynthesis, antioxidant activity and epibacteria. Exposure to UV-radiation resulted in photoinhibition with a subsequent low recovery in subtidal thalli from 23°S compared to 27°S and 30°S, which both showed a higher and almost complete recovery. However, a high antioxidant activity was present in all thalli, permitting to explain its relatively high tolerance to new environments. UV-radiation modified the composition of the epibacteria community by reducing its diversity and evenness. Our results showed that C. fragile responds plastic to variable UV-radiation (depending on site and water depth), which contributes to its high invasion potential.
AB - Invasive species such as seaweeds often have a broad tolerance, allowing them to colonize novel habitats. During invasion, also new epibacteria can be formed on seaweeds, which have important chemo-ecological effects. Since UV-radiation (UVR) is one of the main factors affecting seaweeds and their epibacteria, we tested its effect on intertidal and subtidal thalli of the invasive seaweed Codium fragile from three sites and monitored photosynthesis, antioxidant activity and epibacteria. Exposure to UV-radiation resulted in photoinhibition with a subsequent low recovery in subtidal thalli from 23°S compared to 27°S and 30°S, which both showed a higher and almost complete recovery. However, a high antioxidant activity was present in all thalli, permitting to explain its relatively high tolerance to new environments. UV-radiation modified the composition of the epibacteria community by reducing its diversity and evenness. Our results showed that C. fragile responds plastic to variable UV-radiation (depending on site and water depth), which contributes to its high invasion potential.
KW - Chile
KW - Codium
KW - Epibacteria
KW - Invasive
KW - Non-indigenous species
KW - Photosynthesis
KW - Seaweed
KW - Tolerance
KW - UV-Radiation
UR - http://www.scopus.com/inward/record.url?scp=85135698976&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85135698976&partnerID=8YFLogxK
U2 - 10.1016/j.marenvres.2022.105708
DO - 10.1016/j.marenvres.2022.105708
M3 - Article
C2 - 35952513
AN - SCOPUS:85135698976
SN - 0141-1136
VL - 180
JO - Marine Environmental Research
JF - Marine Environmental Research
M1 - 105708
ER -