Growth characteristics of bloom-forming filamentous green algae in the littoral zone of an experimentally acidified lake

1995 ◽  
Vol 52 (10) ◽  
pp. 2251-2263 ◽  
Author(s):  
Michael A. Turner ◽  
Leif J. Sigurdson ◽  
David L. Findlay ◽  
E. Todd Howell ◽  
Gordon G. C. Robinson ◽  
...  
Keyword(s):  
Water Temperature ◽  
Green Algae ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Benthic Algae ◽  
Growth Characteristics ◽  
Experimental Lakes Area ◽  
Filamentous Green Algae ◽  
High Photosynthetic Capacity ◽  
Major Factors

Filamentous green algae, predominantly Mougeotia and Zygogonium, bloom frequently in the littoral zones of acidified lakes. Growth characteristics of Zygogonium-dominated filamentous green algae were studied for 4 yr in an experimentally acidified (pH 4.5) lake at the Experimental Lakes Area of northwestern Ontario. They were present in low abundance as periphyton (algal associations attached to surfaces) during spring, and as blooms of metaphyton (benthic algae unconstrained by surfaces) beginning in midsummer and reaching a maximum in early fall. Metaphytic filamentous green algae displayed high photosynthetic capacity in summer despite the oligotrophic nature of the acidified lake. The major factors controlling photosynthetic rates of Zygogonium were similar to those controlling Mougeotia, and included algal crowding, irradiance, dissolved inorganic carbon, and water temperature. Rates of photosynthesis were negatively dependent upon algal crowding, so that highest rates were associated with minimum algal crowding. Light requirements for photosynthesis were higher than those of the epilithon, which were dominant prior to acidification. The dependence of photosynthesis on ambient concentrations of dissolved inorganic carbon was partly regulated by water temperature. Anthropogenically caused releases from growth limitations (e.g., increased availability of limiting nutrients, increased water temperature, and extension of the growing season) may cause proliferation of filamentous green algae in the future.

Ecological effects of blooms of filamentous green algae in the littoral zone of an acid lake

1995 ◽  
Vol 52 (10) ◽  
pp. 2264-2275 ◽  
Author(s):  
Michael A. Turner ◽  
Bruce E. Townsend ◽  
Gordon G. C. Robinson ◽  
Brenda J. Hann ◽  
John A. Amaral
Keyword(s):  
Green Algae ◽  
Littoral Zone ◽  
Dissolved Inorganic Carbon ◽  
Ecological Effects ◽  
Experimental Lakes Area ◽  
Filamentous Green Algae ◽  
Northwestern Ontario ◽  
Lake Bottom ◽  
Chemical Cycling ◽  
Physical Features

Ecological effects of blooms of filamentous green algae (FGA) were studied in an experimentally acidified lake (pH 4.5) at the Experimental Lakes Area in northwestern Ontario, Canada. Blooms of FGA influenced the energy balance, chemical cycling, physical features, and biological conditions in the littoral zone. Photosynthetic capacity of the FGA, dominated by Zygogonium, was greater than that of acidified epilithon, the normally dominant littoral algal association, partially offsetting acidification-induced oligotrophication in the littoral zone. Intra- and inter-annual variability of FGA growth was large, however, so that FGA were an unreliable energy source for the littoral food web. Nutrient uptake varied with the degree of FGA growth; e.g., FGA were occasionally the largest phosphorus pool in the epilimnion. Nitrogen dynamics of FGA varied seasonally causing acidification in spring and summer, and alkalinization in fall. The blooms also affected epilimnetic cycling of dissolved inorganic carbon. Peak blooms prevented as much as 90% of the light from reaching the lake bottom. Local depletions of oxygen resulting from FGA decomposition also posed potential risks for animals using the FGA as habitat.

Alkalization of the Medium by Unicellular Green Algae during Uptake Dissolved Inorganic Carbon

1993 ◽  
Vol 34 (5) ◽  
pp. 649-657 ◽  
Author(s):  
Yoshihiro Shiraiwa ◽  
Arun Goyal ◽  
N.E. Tolbert
Keyword(s):  
Green Algae ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon

Oxygen inhibition of dissolved inorganic carbon uptake in unicellular green algae

2001 ◽  
Vol 49 (4) ◽  
pp. 319-324 ◽  
Author(s):  
Durba Ghoshal ◽  
Arun Goyal
Keyword(s):  
Green Algae ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Carbon Uptake ◽  
Oxygen Inhibition ◽  
Inorganic Carbon Uptake

Regulation of dissolved inorganic carbon transport in green algae

1998 ◽  
Vol 76 (6) ◽  
pp. 1072-1083 ◽  
Author(s):  
Yusuke Matsuda ◽  
Gale G. Bozzo ◽  
Brian Colman
Keyword(s):  
Green Algae ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Inorganic Carbon Transport ◽  
Carbon Transport

scholarly journals Effect of Rainfall and pH on Musty Odor Produced in the Sanbe Reservoir

Water ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 3600
Author(s):  
Sangyeob Kim ◽  
Shohei Hayashi ◽  
Shingo Masuki ◽  
Kazuhiro Ayukawa ◽  
Shuji Ohtani ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Temperature ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Water Systems ◽  
Cyanobacterial Blooms ◽  
Field Observations ◽  
The World ◽  
Musty Odor ◽  
Harmful Cyanobacterial Blooms

Harmful cyanobacterial blooms are continuously formed in water systems such as reservoirs and lakes around the world. Geosmin and 2-methylisoborneol (2-MIB) produced by some species of cyanobacteria have caused odor problems in the drinking water of the Sanbe Reservoir in Japan. Field observations were conducted for four years (2015–2019) to investigate the cause of this musty odor. It was found that geosmin was produced by Dolichospermum crassum and Dolichospermum planctonicum (cyanobacteria), and 2-MIB was due to Pseudanabaena sp. and Aphanizomenon cf. flos-aquae (cyanobacteria). Changes in water temperature and pH caused by rainfall were correlated with changes in the concentration of geosmin and 2-MIB. In particular, geosmin and 2-MIB tended to occur under low rainfall conditions. When there was low rainfall, the reservoir changed to an alkaline state because the phytoplankton consumed CO2 for photosynthesis. In an alkaline reservoir, dissolved inorganic carbon mainly existed in the form of bicarbonate (HCO3−). Thus, the results suggest that under such conditions in reservoirs, cyanobacteria grew easily because they could use both CO2 and HCO3− for photosynthesis. Specifically, our study suggests that in order for the musty odor problem in the reservoir to be solved, it is important that the pH of the reservoir be controlled.

Whole-Lake Radiocarbon Experiment in an Oligotrophic Lake at the Experimental Lakes Area, Northwestern Ontario

1980 ◽  
Vol 37 (3) ◽  
pp. 454-463 ◽  
Author(s):  
R. H. Hesslein ◽  
W. S. Broecker ◽  
P. D. Quay ◽  
D. W. Schindler
Keyword(s):  
Gas Exchange ◽  
Organic Carbon ◽  
Film Thickness ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Oligotrophic Lake ◽  
Daughter Product ◽  
Experimental Lakes Area ◽  
Average Value ◽  
Carbon 14

To gain more insight into the nature of carbon cycling in lakes and to provide a check on estimates of carbon fluxes obtained by more conventional means, 1 Ci (= 37 GBq) of C14 as NaHCO3 was added to the epilimnion of Lake 224, a dimictic, oligotrophic lake of the Canadian Shield near Kenora, Ontario. The dominant loss from the dissolved inorganic carbon (DIC) pool was via C14O2 evasion to the overlying atmosphere. The next most important loss from the DIC pool was by photosynthetic fixation of inorganic carbon by epilimnetic phytoplankton. About half of the C14 thus incorporated into the particulate organic carbon (POC) pool was converted into soluble organic molecules which became part of the epilimnetic dissolved organic carbon-14 (DOC) pool. Since the amount of C14 lost to the sediments of the epilimnion, to the hypolimnion, and to periphyton biomass was not significant to the C14 mass balance over the duration of the experiment, the rate of gas exchange can be calculated by measuring the decrease in epilimnetic C14 inventory (DIC14 + POC14 + DOC14) over a specific time period. Using the stagnant boundary model and pCO2 values calculated from pH, temperature and DIC data a range of stagnant film thicknesses of 212–316 μm was obtained. To provide a check on the film thickness calculated from C14 inventories 10 mCi if Ra226 was also added to the epilimnion of L224. Measurements of Rn222, the gaseous daughter product of Ra226, allowed an independent estimate of the film thickness. The average value of 200 μm obtained in this way is consistent with that obtained for C14O2 evasion. A simplified model was also constructed to describe the behavior of the POC and DOC pools. This model produced results in excellent agreement with the photosynthetic rate averaging 65 mg C∙m−1∙d−1 measured using C14 and the Fee incubator technique. The model also suggests that only about 10% of the POC + DOC pool is active in the photosynthetic process on the time scale of 30 d.Key words: whole-lake radiocarbon experiment, gas exchange, primary production, radium226, radon222, carbon14, carbon in lakes

scholarly journals Changes in the aquatic moss Sphagnum denticulatum Brid. population abundance in a softwater lake over a period of three years

2011 ◽  
Vol 79 (2) ◽  
pp. 167-173 ◽  
Author(s):  
Józef Szmeja
Keyword(s):  
Water Temperature ◽  
Green Algae ◽  
Algal Bloom ◽  
Population Abundance ◽  
Aquatic Moss ◽  
The Third ◽  
Filamentous Green Algae ◽  
Water Ph ◽  
Second Year ◽  
Sediment Ph

Changes in population abundance of submerged <em>Sphagnum denticulatum</em> Brid. were studied in an acidic and oligotrophic lake in NW Poland over three years. Individuals were counted in a moss carpet at a depth of 2.5 m on 4 experimental plots, 1 × 1 m each, every 30 days for 36 months using the SCUBA method. PAR intensity was seasonally variable (in winter higher than in summer). Changes in water pH, conductivity, HCO<sub>3</sub><sup>-</sup> concentration, hydration and sediment pH were statistically insignificant (p &gt; 0.05). In the summer of the second study year the moss carpet disappeared almost completely due to a massive bloom of filamentous green algae. Periods of growth, regression and regeneration were observed in the population. The stabilisation of population size took 24 months and followed the pattern: slight fluctuations, then rapid growth and repetition of slight fluctuations. The first stage lasted nine, the second four and the third nine months. These stages took place irrespective of seasons, temperature or PAR intensity. Each rapid increase in abundance lasted about 30 days, at PAR intensity &gt;20% and water temperature ranging from 11 to 16<sup>o</sup>C (in winter, spring or autumn). The regression stage brought about by the algal bloom started in the second year (in summer) and lasted six months (until the end of January in the third year). The population regeneration began in winter (in February, water temperature 3.0<sup>o</sup>C, PAR about 20%, ice cover 0.15 m) and finished with the end of spring. The population of <em>S. denticulatum</em> shows a repetitive pattern of abundance variations, which is seriously disturbed in summer, especially after a warm spring, by a massive bloom of filamentous green algae.

A high-elevation MIS 5 hydrologic record using mollusks and ostracodes from Snowmass Village, Colorado, USA

2014 ◽  
Vol 82 (3) ◽  
pp. 604-617 ◽  
Author(s):  
Saxon E. Sharpe ◽  
Jordon Bright
Keyword(s):  
Stable Isotopes ◽  
Water Temperature ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
High Elevation ◽  
Total Dissolved Solids ◽  
Water Based ◽  
Fossil Site ◽  
Mis 5E ◽  
Mis 5

AbstractSediments containing terrestrial and aquatic mollusks and ostracodes from the Ziegler Reservoir fossil site (2705 m elevation) near Snowmass Village, Colorado, span ~130–87 ka (MIS 5e through 5b). The southeastern area of the site where taxa were recovered was a relatively fresh, shallow, well-vegetated wetland during MIS 5e through 5c time, approximately 2 m deep, with a total dissolved solids value of ~200–1000 mg L− 1. The wetland was seasonally or annually variable and groundwater discharged along the margins of the bounding moraine. Groundwater likely contributed solutes to the system and may have contributed 18O-enriched water. Based on stable isotopes from ostracode calcite (δ18OOST and δ13COST), seasonal evaporation occurred and the dissolved inorganic carbon pool was unexpectedly enriched in 13C. The mollusk and ostracode faunas changed little across the MIS 5e/5d/5c boundaries, whereas a distinct change in the ostracode fauna occurred between the deposition of Unit 11 and Unit 13, which corresponds in time to the MIS 5c/5b boundary, indicating some combination of increased surface and/or groundwater flow, a decrease in water temperature, and a freshening and a possible deepening of the wetland.

Production of Epilithiphyton in Two Lakes of the Experimental Lakes Area, Northwestern Ontario

1973 ◽  
Vol 30 (10) ◽  
pp. 1511-1524 ◽  
Author(s):  
D. W. Schindler ◽  
V. E. Frost ◽  
R. V. Schmidt
Keyword(s):  
Liquid Scintillation ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Seasonal Effects ◽  
Algal Flora ◽  
Experimental Lakes Area ◽  
New Techniques ◽  
Natural Lakes ◽  
Northwestern Ontario

Two new techniques for measuring photosynthesis by benthic algal flora in waters low in dissolved inorganic carbon are described. The first uses gas chromatography to measure changes in DIC in incubation chambers directly. The second is a variation of the usual 14C procedure, in which disappearance of 14C from the water is measured by liquid scintillation instead of uptake of 14C by the algae. This procedure is simpler than measuring the uptake of 14C, because digestion and/or combustion of samples is not necessary. Results are compared with the commonly employed 14C uptake and O2 release techniques.Tests showed that heterogeneity of substrate was the major source of variation in in situ results, being large enough to make interpretation of seasonal effects and other causal factors extremely difficult.Annual production by epilithiphyton in two natural lakes in the Experimental Lakes Area (ELA) was 5.19 g C and 5.18 g C/m2 of substrate annually for lakes 239 and 240, respectively. These are the lowest values recorded for freshwater lakes at temperate latitudes.Because DIC and O2 concentrations could be measured simultaneously, it was possible to calculate photosynthetic quotients on several dates. These were extremely high, averaging 2.6 for the summer of 1971.

scholarly journals Salicylhydroxamic Acid (SHAM) Inhibition of the Dissolved Inorganic Carbon Concentrating Process in Unicellular Green Algae

1990 ◽  
Vol 92 (3) ◽  
pp. 630-636 ◽  
Author(s):  
Arun Goyal ◽  
N. Edward Tolbert
Keyword(s):  
Green Algae ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Salicylhydroxamic Acid
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