Algal response to a thermal effluent: study of a power station on the provo river, Utah, USA

Squires, Lorin E.; Rushforth, Samuel R.; Brotherson, Jack D.

doi:10.1007/bf00021013

Cited by 46 publications

(26 citation statements)

References 7 publications

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“…Printed in The Netherlands. Klarer & Hickman 1975 ;Andrzejczak-Czechowska & Wisniewski 1976 ;Squires et al 1979) . In this study pond, Vasikkalampi, the circulation of pond water through the power-plant for cooling and the returning of that water to the pond as warm effluent water creates a water flow gradient in the pond and raises the pond temperature to such a degree that ice cover, which would normally cover the entire pond, is greatly reduced and only occurs occasionally in the middle of the pond .…”

Section: Introductionmentioning

confidence: 99%

Periphyton growth and diatom community structure in a cooling water pond

Eloranta

1982

Hydrobiologia

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Periphyton (Aufwuchs) accumulation was measured on artificial substrates in a pond in central Finland which receives warm cooling-water effluent from a power plant. The growth of periphyton was generally more rapid on the substrates during the first two weeks of colonization near the inflow of the warm water effluent than in the middle of the pond . The maximum accumulation of periphyton was in spring and autumn (dry weight maximum at warm effluent was in spring 3 .5 mg DW cm -2,2 .65 mg AFDW cm -2 ; chlorophyll a maximum 3 .96 yg cm -2 was found in autumn at pond-middle station) . During mid-winter months the growth was strongly limited by solar radiation, but the growth was also slow at both stations in the summer months, when the power plant was out of operation . The periphyton accumulation rate was fastest near the water surface and decreased rapidly with increasing depth . A total of 167 diatom species were found in periphyton samples . However, most species were rare ; many of the dominants were common to both plankton and periphyton . Species similarity analyses (Jaccard's similarity) between 10 different diatom communities (including periphyton from 9 different types of substrates and phytoplankton) indicated low similarity index values although differences between communities were not significant .

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Section: Introductionmentioning

confidence: 99%

Periphyton growth and diatom community structure in a cooling water pond

Eloranta

1982

Hydrobiologia

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“…euglypta, with raphe valves closely appressed to the substrate ('adnate' mode of attachment, sensu Round et al 1990) and seemed to prevail all over the shell surface (Figs 8,9). This diatom, and the genus as a group, is considered as a thermophilic species preferring temperatures over 22 °C (squiRes et al 1979;vinson & RushFoRth 1989). It was found in Greece also as epibiont on the shells of another gastropod of Hydrobiidae, Potamopyrgus antipodarum (J.E.…”

Section: Epibiotic Diatomsmentioning

confidence: 99%

Photosynthetic microorganisms as epibionts and euendoliths on biotic substrates in a thermal spring with ferric-iron deposits.

Radea¹,

Louvrou²,

Pantazidou³

et al. 2010

Fottea

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Rust-coloured shells of the aquatic gastropod Ventrosia ventrosa, a new record for eastern Greece, indicating presence of iron (EDAX analysis) were studied for detection of iron-encrusted photosynthetic epibionts in a Greek brackish-water thermal spring (38 °C). Microscopic analyses (LM, SEM) revealed the presence of a biofilm consisted of mostly facultative micro-epibionts, i.e. a) 5 periphytic taxa of coccal and filamentous cyanobacteria, including a taxonomically and ecologically interesting morphospecies, Xenococcus cf. pyriformis, dominated exclusively on the shell surface, and b) pennate diatoms with higher species richness (18 periphytic taxa of the genera Amphora, Brachysira, Cymbella, Diatoma, Encyonema, Navicula, Nitzschia, Pleurosigma, Synedra, Ulnaria; 5 taxa as new records for Greece), most of them emerging only after acid treatment of whole gastropod shells. The abundant diatoms thriving directly or nearby the iron-coatings (Cocconeis placentula var. euglypta and Achnanthes brevipes sensu lato) exhibited different modes of attachment ('adnate' and 'pendunculate', respectively). Two euendolithic cyanobacteria (Hyella sp. and Leptolyngbya terebrans; the former with special taxonomic interest) were also found perforating the delicate gastropod shells, with no distinct differentiation in the extent of infestation between live and dead gastropod shells. Moreover, the possible impact of these encrusted photosynthetic assemblages on V. ventrosa was investigated; statistical analysis showed that a) there is no 'drag effect', induced by the epibionts, influencing the gastropod growth (i.e. shell length), b) shell size enlargement provides a favourable space and promotes the intense fouling by both micro-epibionts and macro-epibionts (eggcapsules), and c) the detachment prevention of egg-capsules is attributed to the biofilm development.

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“…euglypta, Navicula permitis, Nitzschia inter-media and Synedra ulna) were included since these species had overall importance values less than 1.0 but values greater than 1.0 in one or more individual sites. In studying thermal eflluent from a power station in Utah, Squires et al (1979) found that Cocconeis placentula var. eugbpta dominated the eBluent area where temperatures reached 24 "C. This supports our findings that Cocconeis placentula var.…”

Section: Diatom Species Notationmentioning

confidence: 99%

Diatom species composition along a thermal gradient in the Portneuf River, Idaho, USA

Vinson

Rushforth

1989

Hydrobiologia

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Glass microscope slides were placed to span a range of temperatures in and around a warm spring in the Portneuf River, Idaho in the winter of 1987. Diatoms were allowed to colonize these slides for 8 weeks. Analysis of slides revealed that maximum species diversity and species richness were reached between 25' and 30 "C. Analysis also showed that certain diatom taxa were stenothermal, showing distinct preferences for various temperatures while others were eurythermal.

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Algal response to a thermal effluent: study of a power station on the provo river, Utah, USA

Cited by 46 publications

References 7 publications

Periphyton growth and diatom community structure in a cooling water pond

Periphyton growth and diatom community structure in a cooling water pond

Photosynthetic microorganisms as epibionts and euendoliths on biotic substrates in a thermal spring with ferric-iron deposits.

Diatom species composition along a thermal gradient in the Portneuf River, Idaho, USA

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