Influence of abiotic factors on the structure of the population of the brown alga Fucus vesiculosus in East Murman (Barents Sea)

Malavenda, S. V.; Воскобойников, Г. М.

doi:10.1134/s1063074009020047

Cited by 4 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One of the extensively studied fucoidan producent is Fucus vesiculosus Linnaeus (Phaeophyceae, Fucales), a widespread specimen of brown algae that grow in cold and moderately cold waters along the rocky shores in the northern hemisphere [ 8 , 9 ]. Due to the eurytopic nature of this alga, the phytochemical composition of F. vesiculosus varies significantly depending on its ontogeny and habitat [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Antibacterial Properties of Fucoidans from the Brown Algae Fucus vesiculosus L. of the Barents Sea

Ayrapetyan

Obluchinskaya

Zhurishkina

et al. 2021

Biology

View full text Add to dashboard Cite

Fucoidans, sulfated polysaccharides found in cell walls of brown algae, are considered as a promising antimicrobial component for various applications in medicine and the food industry. In this study, we compare the antibacterial properties of two fractions of fucoidan from the brown algae Fucus vesiculosus gathered in the littoral of the Barents Sea and sampled at different stages of purification. The crude fraction of fucoidan was isolated from algae by extraction with aqueous ethanol and sonication. The purified fraction was obtained by additional treatment of the crude fraction with a solution of calcium chloride. The structural features of both fractions were characterized in detail and their antibacterial effects against several Gram-positive and Gram-negative bacteria were compared by photometry, acridine orange staining assay, and atomic force microscopy. Fucoidan inhibited growth in all of the above microorganisms, showing a bacteriostatic effect with minimum inhibitory concentrations (MIC) in the range between 4 and 6 mg/mL, with E. coli being the most sensitive to both fractions. Changes in the chemical composition after treatment of the crude fraction with a solution of calcium chloride led to a decrease in the content of sulfates and uronic acids and diminished antibacterial activity.

show abstract

Section: Introductionmentioning

confidence: 99%

Antibacterial Properties of Fucoidans from the Brown Algae Fucus vesiculosus L. of the Barents Sea

Ayrapetyan

Obluchinskaya

Zhurishkina

et al. 2021

Biology

View full text Add to dashboard Cite

show abstract

“…vesiculosus, low salinity alters sex ratios, as populations become dominated by female plants in low salinities (Malavenda and Voskoboinikov, 2009). This kind of responses may decrease genetic diversity, and make the local populations more vulnerable to other environmental changes.…”

Section: Responses To Low Salinitymentioning

confidence: 99%

Climate change can cause complex responses in Baltic Sea macroalgae: A systematic review

Takolander

Cabeza

Leskinen

2017

Journal of Sea Research

View full text Add to dashboard Cite

Estuarine macroalgae are important primary producers in aquatic ecosystems, and often foundation species providing structurally complex habitat. Climate change alters many abiotic factors that affect their long-term persistence and distribution. Here, we review the existing scientific literature on the tolerance of key macroalgal species in the Baltic Sea, the world's largest brackish water body. Elevated temperature is expected to intensify coastal eutrophication, further promoting growth of opportunistic, filamentous species, especially green algae, which are often species associated with intensive filamentous algal blooms. Declining salinities will push the distributions of marine species towards south, which may alter the Baltic Sea community compositions towards a more limnic state. Together with increasing eutrophication trends this may cause losses in marine-originating foundation species such as Fucus, causing severe biodiversity impacts. Experimental results on ocean acidification effects on macroalgae are mixed, with only few studies conducted in the Baltic

show abstract

“…The projected decreasing salinity may exceed osmotic tolerance of e.g. F. vesiculosus (Serrão et al ) and alter population sex‐ratios, which may further decrease the genetic diversity and resilience to other environmental stressors (Malavenda and Voskoboinikov ).…”

Section: Introductionmentioning

confidence: 99%

Long‐term changes in the phytobenthos of the southern Åland Islands, northern Baltic Sea

Maarse

Salovius‐Laurén

Snickars

2020

Nordic Journal of Botany

View full text Add to dashboard Cite

Marine macrophytes and ‐algae have undergone major changes in abundance and species composition over the last decades, primarily due to eutrophication. However, comparable studies conducted in the mid 20th century are rare, but potentially valuable for enabling insight into changes in the benthic communities from the early onset of the eutrophication of the Baltic Sea. In the present study, the submerged phytobenthic community in the exposed southern archipelago of the Åland Islands was examined in 2018 and compared with surveys conducted in 1956 and 1993, respectively. The aim was to analyze long‐term changes in the phytobenthic community in relation to the general large‐scale anthropogenic drivers since the 1950s. Between 1956 and 1993, a decrease in the total number of species/taxa, an increase of filamentous algae coverage and a decrease in the depth range of Fucus vesiculosus was observed. These changes in the phytobenthic community continued between 1993 and 2018, suggesting no changes in the previously described negative trends. Between 1956 and 2018, a general shift in the distribution of phytobenthic functional groups, (grouped according to morphology and type of algae; green, brown and red) occurred, with increased coverage of filamentous brown and green algae, and decline in red algae coverage. The depth range of F. vesiculosus also decreased by >50% between 1956 and 2018. The results support findings that the eutrophication of the northern Baltic Sea is still at a high level, which slows down or prevents the recovery of offshore phytobenthic communities, despite the progress seen in other areas. Thus, the likely main drivers behind the changes are the direct and indirect effects of eutrophication in combination with warmer water, i.e. an effect of climate change.

show abstract

Influence of abiotic factors on the structure of the population of the brown alga Fucus vesiculosus in East Murman (Barents Sea)

Cited by 4 publications

References 5 publications

Antibacterial Properties of Fucoidans from the Brown Algae Fucus vesiculosus L. of the Barents Sea

Antibacterial Properties of Fucoidans from the Brown Algae Fucus vesiculosus L. of the Barents Sea

Climate change can cause complex responses in Baltic Sea macroalgae: A systematic review

Long‐term changes in the phytobenthos of the southern Åland Islands, northern Baltic Sea

Contact Info

Product

Resources

About