E-resources
Peer reviewed
Open access
-
Muñoz, Pamela T.; Rodríguez-Rojas, Fernanda; Celis-Plá, Paula S. M.; López-Marras, Américo; Blanco-Murillo, Fabio; Sola, Iván; Lavergne, Céline; Valenzuela, Fernando; Orrego, Rodrigo; Sánchez-Lizaso, José Luis; Sáez, Claudio A.
Frontiers in Marine Science, 02/2023, Volume: 10Journal Article
Desalination brines from direct seawater intake that get discharged to coastal areas may produce stress responses on benthic marine communities, mostly due to its excess salinity, and especially on sessile organisms; in this context, macroalgae have been understudied in desalination ecotoxicological investigations. In this study, we assessed the short- and long-term cellular tolerance responses in two brown species of the macroalgae genus Dictyota through controlled laboratory conditions. Dictyota kunthii was collected from the eastern Pacific Ocean (average salinity, ~34 psu), whereas Dictyota dichotoma was from the Mediterranean Sea (average salinity, ~37 psu). Each macroalgae species was exposed for up to 7 days to two conditions with increased salinity values: +2 and +7 psu above their natural average salinity. Photosynthetic parameters and oxidative stress measurements were determined. The results showed that, in both Dictyota species, high salinity values induced reduced photoinhibition ( F v /F m ) but increased the primary productivity (ETR max ) and light requirement (Ek ETR ) especially after 7 days. Conversely, the photosynthetic efficiency (α ETR ) decreased in hypersalinity treatments in D. dichotoma , while there were no changes in D. kunthii . The reactive oxygen species hydrogen peroxide (H 2 O 2 ) was greater at high salinity values at 3 days for D. dichotoma and after 7 days in D. kunthii , while lipid peroxidation decreases under hypersalinity with time in both species. Despite the evident H 2 O 2 accumulation in both species against hypersalinity, it did not produce oxidative damage and important impairment in the photosynthetic apparatus. These results contribute to understanding the tolerance strategies at the cellular level of Dictyota spp., which may be considered as potential candidates for biomonitoring of desalination impacts in the field.
![loading ... loading ...](themes/default/img/ajax-loading.gif)
Shelf entry
Permalink
- URL:
Impact factor
Access to the JCR database is permitted only to users from Slovenia. Your current IP address is not on the list of IP addresses with access permission, and authentication with the relevant AAI accout is required.
Year | Impact factor | Edition | Category | Classification | ||||
---|---|---|---|---|---|---|---|---|
JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
Select the library membership card:
If the library membership card is not in the list,
add a new one.
DRS, in which the journal is indexed
Database name | Field | Year |
---|
Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
---|
Source: Personal bibliographies
and: SICRIS
The material is available in full text. If you wish to order the material anyway, click the Continue button.