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Ecophysiological responses of Baltic and Atlantic Fucus vesiculosus to environmental factors
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
2005 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The Baltic Sea is a species-poor ecosystem where marine species coexist with freshwater species. The Baltic Sea offers low salinity, low content of inorganic carbon, long cold winters and no tides.One of the few marine species that can be found in the Baltic, is the brown alga Fucus vesiculosus, which is regarded as ecologically the most important alga in this area. The aim of the present thesis was to examine physiological (photosynthesis and growth) differences between F. vesiculosus in the Bothnian Sea (northern Baltic) and the Atlantic. Measurements were performed with plants in their natural seawaters and under changed conditions of salinity, temperature, nutrients and inorganic carbon concentrations.

Place, publisher, year, edition, pages
Sundsvall: Mittuniversitetet , 2005. , 44 p.
Series
Mid Sweden University doctoral thesis, ISSN 1652-893X ; 6
Keyword [en]
acclimation, Atlantic, Baltic Sea, Bothnian Sea, Cd, Fucus vesiculosus, growth, high PAR, Pb, photosynthesis, salinity, stress, UV-B
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:miun:diva-5880Local ID: 4405ISBN: 91-85317-15-2 (print)OAI: oai:DiVA.org:miun-5880DiVA: diva2:30913
Public defence
2005-12-09, M108, Åkroken, Sundsvall, 10:00 (English)
Supervisors
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2009-07-13Bibliographically approved
List of papers
1. Effects of lead (PbCl2) on photosynthesis and respiration of the bladderwrack, Fucus vesiculosus, in relation to different salinities.
Open this publication in new window or tab >>Effects of lead (PbCl2) on photosynthesis and respiration of the bladderwrack, Fucus vesiculosus, in relation to different salinities.
1999 (English)In: Water, Air and Soil Pollution, ISSN 0049-6979, Vol. 116, no 3-4, 549-565 p.Article in journal (Refereed) Published
Abstract [en]

The photosynthetic and respiratoric capacity of Fucus vesiculosus grown at three different levels of salinity (4.5, 8 and 20‰) was studied in the presence of different concentrations of lead (5, 10, 15, 20, 25, and 30 mg PbCl2 L-1). The studies were performed by using a light-pipette, which has a precisely defined light source of photosynthetic active radiation (PAR, 400-700 nm). The photosynthetic and respiratoric capacity of the algae were measured when exposed to light pulses with increasing irradiance and after 24 hr in seawater with the addition of lead. The results indicate that the photosynthetic capacity of F. visiculosus from 20‰ is more sensitive to lead compared to those from 8 and 4.5‰. The photosynthetic capacity was reduced by 69% at 30 mg PbCl2 L-1 compared to the control alga. The photosynthetic capacity of F vesiculosus from 8 and 4.5‰ was reduced by 38 and 15%. The respiratoric capacity of F. vesiculosus from 20‰ was reduced by 41% at 30 mg PbCl2 L-1. However, the respiratoric capacity of the algae from 4.5‰ increased by 55% at the same concentration of PbCl2. The results indicate that lead showed inhibitory effects on photosynthesis but a stimulatory effect on respiration of F versiculosus grown at low levels of salinity.

Keyword
Lead ; Water pollution ; Photosynthesis ; Respiration ; Photorespiration ; Marine environment ; Sweden ; Coastal zone ; Fucus vesiculosus ; Europe ; Heavy metal ; Phaeophyceae ; Heterokontophyta ; Algae ; Thallophyta ;
National Category
Biological Sciences
Identifiers
urn:nbn:se:miun:diva-1869 (URN)10.1023/A:1005191011421 (DOI)000083273200007 ()666 (Local ID)666 (Archive number)666 (OAI)
Available from: 2008-12-10 Created: 2008-12-10Bibliographically approved
2. Photosynthesis and UV-B tolerance of the marine alga Fucus vesiculosus at different sea water salinities
Open this publication in new window or tab >>Photosynthesis and UV-B tolerance of the marine alga Fucus vesiculosus at different sea water salinities
2006 (English)In: Journal of Applied Phycology, ISSN 0921-8971, E-ISSN 1573-5176, Vol. 18, no 3-5, 461-467 p.Article in journal (Refereed) Published
Keyword
Dark respiration, Fucus vesiculosus, Oxygen evolution, Photosynthesis, Pigments, Salinity, UV-B
National Category
Biological Sciences
Identifiers
urn:nbn:se:miun:diva-3331 (URN)10.1007/s10811-006-9050-x (DOI)000242434900029 ()2-s2.0-33845438948 (Scopus ID)3284 (Local ID)3284 (Archive number)3284 (OAI)
Available from: 2009-01-07 Created: 2009-01-05 Last updated: 2016-09-30Bibliographically approved
3. Photosynthetic properties of Fucus vesiculosus (Phaeophyceae) from different depths and sites in the Bothnian Sea.
Open this publication in new window or tab >>Photosynthetic properties of Fucus vesiculosus (Phaeophyceae) from different depths and sites in the Bothnian Sea.
(English)Manuscript (preprint) (Other academic)
Keyword
Fucus vesiculosus, photosynthesis, Bothnian Sea, depth
National Category
Biological Sciences
Identifiers
urn:nbn:se:miun:diva-6279 (URN)3285 (Local ID)3285 (Archive number)3285 (OAI)
Available from: 2008-11-30 Created: 2008-11-30 Last updated: 2013-01-10Bibliographically approved
4. Influence of salinity, temperature, dissolved inorganic carbon and nutrient concentration on the photosynthesis and growth of Fucus vesiculosus from the Baltic and Irish Seas
Open this publication in new window or tab >>Influence of salinity, temperature, dissolved inorganic carbon and nutrient concentration on the photosynthesis and growth of Fucus vesiculosus from the Baltic and Irish Seas
2008 (English)In: European journal of phycology, ISSN 0967-0262, Vol. 43, no 3, 253-262 p.Article in journal (Refereed) Published
Abstract [en]

Fucus vesiculosus from the northern Baltic Sea (5 psu) and from the Irish Sea (35 psu) were cultivated at different temperatures, salinities and dissolved inorganic carbon (DIC) concentrations with the addition of different nutrient concentrations. The influence of these abiotic factors was assessed by measuring photosynthesis as electron transport rate (ETR) and growth as relative growth rate (RGR). The maximal ETR and the RGR of the Irish Sea plants in their natural seawater (50.8 mol electrons m(-2) s-1; 0.024 g g(-1) day(-1)) were significantly higher than those of the Baltic plants in their natural seawater (21.9 mol electrons m-2 s(-1); 0.007 g g(-1) day(-1)). When Baltic F. vesiculosus was cultivated at a DIC concentration similar to that of the Irish Sea, the ETR as well as RGR increased, but never equalled the rates of the marine F. vesiculosus from the Irish Sea. Cultivation at different salinities showed that F. vesiculosus from the Baltic has a higher ETRmax and RGR at low salinities (5-10 psu) than F. vesiculosus from the Irish Sea, whose ETR and RGR decreased sharply in salinities below 20 psu. Plants from both sites grown at high nutrient concentrations, however, performed better at low salinities than those grown under low nutrient conditions. Salinity had the greatest impact on differences in ETR and RGR between the two populations, followed by differences in DIC and nutrient concentrations. There was a highly significant correlation between ETRmax and RGR in plants from both sites and across the full range of culture conditions, indicating that the same amount of energy from photosynthesis is used for growth in both varieties of the species at different salinities. The photosynthesis of F. vesiculosus in the northern Baltic is close to the minimum demand for growth, which may account for their small size. The temperature optimum for F. vesiculosus from the Baltic was 4-10 degrees C, while that for F. vesiculosus from the Irish Sea was 15-20 degrees C. The photosynthesis of Irish Sea plants was less strongly affected by exposure to high irradiances than that of plants from the Baltic.

Keyword
BROWN-ALGAE; PAM FLUOROMETRY; WATER; PHAEOPHYCEAE; FUCALES; ECOPHYSIOLOGY; LAMINARIALES; CHLOROPHYTA; ADAPTATION; MACROALGAE
National Category
Biological Sciences
Identifiers
urn:nbn:se:miun:diva-7239 (URN)10.1080/09670260802172627 (DOI)000259086000002 ()2-s2.0-50249137212 (Scopus ID)
Note

VR-Biology

Available from: 2008-11-30 Created: 2008-11-30 Last updated: 2013-01-10Bibliographically approved
5. Cadmium tolerance and adsorption by the marine brown alga Fucus vesiculosus from the Irish Sea and the Bothnian Sea
Open this publication in new window or tab >>Cadmium tolerance and adsorption by the marine brown alga Fucus vesiculosus from the Irish Sea and the Bothnian Sea
Show others...
2009 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 100, no 5, 1727-1733 p.Article in journal (Refereed) Published
Abstract [en]

Cadmium (Cd) uptake capacities and Cd tolerance of the marine alga Fucus vesiculosus from the Irish Sea (salinity 35 psu) and from the Bothnian Sea (northern Baltic, 5 psu) were quantified. These data were complemented by measurements of changes in maximal photosynthetic rate (Pmax), dark respiration rate and variable fluorescence vs. maximal fluorescence (Fv:Fm). At concentrations between 0.01 and 1 mmol Cd l−1, F. vesiculosus from the Bothnian Sea adsorbed significantly more (about 98%) Cd compared with F. vesiculosus from the Irish Sea. The photosynthetic measurements showed that the Bothnian Sea F. vesiculosus were more sensitive to Cd exposure than the Irish Sea algae. The algae from the Irish Sea showed negative photosynthetic effects only at 1 mmol Cd l−1, which was expressed as a decreased Pmax (−12.3%) and Fv:Fm (−4.6%). On the contrary, the algae from the Bothnian Sea were negatively affected already at Cd concentrations as low at 0.1 mmol Cd l−1. They exhibited increased dark respiration (+11.1%) and decreased Fv:Fm (−13.9%). The results show that F. vesiculosus from the Bothnian Sea may be an efficient sorption substrate for Cd removal from Cd contaminated seawater and this algae type may also have applications for wastewater treatment.

Keyword
Fucus vesiculosus, cadmium, photosynthesis, adsorption
National Category
Biological Sciences
Identifiers
urn:nbn:se:miun:diva-6280 (URN)10.1016/j.biortech.2008.09.041 (DOI)000262704300004 ()2-s2.0-57049188259 (Scopus ID)3286 (Local ID)3286 (Archive number)3286 (OAI)
Available from: 2008-11-30 Created: 2008-11-30 Last updated: 2016-09-23Bibliographically approved

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