Lakewide odours in Ontario and New Hampshire caused by Chrysochromulina breviturrita Nich. (Prymnesiophyceae)

Nicholls, Kenneth H.; Beaver, Janet L.; Estabrook, Robert H.

doi:10.1007/bf00006281

Cited by 34 publications

(18 citation statements)

References 13 publications

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“…Latter author used photoinhibition mechanisms acting in the surface layers to explain her findings. In fact, according to literature, Chrysochromulina breviturrita, a representative species for total biovolume during phase 2, can be sensitive to high irradiance (Nicholls et al, 1982). Present work reported its biomass peak during August, near the reservoir bottom.…”

Section: Discussionmentioning

confidence: 78%

Phytoplankton seasonal and vertical variations in a tropical shallow reservoir with abundant macrophytes (Ninféias Pond, Brazil)

Fonseca

Bicudo

2011

Hydrobiologia

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This study aimed at analyzing the environmental factors which determine the structure and dynamic of phytoplankton in a shallow reservoir with abundant macrophyte flora, Ninféias Pond (Brazil). It is hypothesized that, although its shallowness, periodic stratifications play an important role on its phytoplankton community. Water samples were collected monthly, from January to December 1997, in four depths (sub-surface, 1 m, 2 m, and bottom) of pelagic zone (Z max = 3.6 m). Community seasonal and vertical variations followed a hot-rainy season with water column stratification (phase 1; Q index: medium), alternating with a cool-dry season with water column mixing (phase 2: Q index: excellent). Nanoplanktonic flagellates dominated, mainly mixotrophic species. During phase 1, Chlamydomonas sp. (G) was the main species, dominating at the anoxic and nutrient-rich hypolimnion. At the same time, richness and diversity were relatively lower. During phase 2, lower water temperatures and higher dissolved oxygen concentrations favoured the prymnesiophyte Chrysochromulina cf. breviturrita (X2). Sequence of functional groups over phases 1 and 2 was: phase 1 = G ? transition = Y/P/E/D/F/W2/ X3 ? phase 2 = X2/Lo/X1; most of these groups have been associated to oligo-mesotrophic systems. Seasonal stratifications played a decisive role in determining the structure and dynamic of phytoplankton in the Ninféias Pond. However, in such a complex and heterogeneous system, other compartments of the food web (macrophytes, zooplankton, fishes) may also act as relevant driving forces, in synergy with the physical and chemical environment.

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Section: Discussionmentioning

confidence: 78%

Phytoplankton seasonal and vertical variations in a tropical shallow reservoir with abundant macrophytes (Ninféias Pond, Brazil)

Fonseca

Bicudo

2011

Hydrobiologia

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“…Moderate acidification to pH ϳ5.0 commonly increases the abundance of chrysophytes and dinoflagellates, often at the expense of planktonic diatoms (Yan and Stokes 1978;Nichols et al 1982;Schindler et al 1991;Findlay and Kasian 1996). These studies also often show that continued acidification to pHϽ5.0 results in predominance by dinoflagellates and loss of chrysophytes, such as occurred in Lake 302S when deep-water chrysophyte populations collapsed (Findlay and Kasian 1990;Findlay et al 1999).…”

Section: Discussionmentioning

confidence: 96%

“…Laboratory and field experiments demonstrate that algal growth can decline with pH (e.g., Stokes 1981;Vinebrooke 1996). In contrast, field surveys document that acidification results in species replacements (Turner et al 1987;Howell et al 1990;Nichols et al 1992), although not necessarily a decline in production (Shearer and DeBruyn 1986; but see Turner et al 1987). In principle, trophic interactions within the food web could lead to either increase or decrease phytoplankton and periphyton abundance, depending on whether predators or prey species are more strongly influenced by acidification events (e.g., Schindler et al 1985;France et al 1991;Appelberg et al 1993).…”

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confidence: 99%

Algal responses to dissolved organic carbon loss and pH decline during whole‐lakeacidification: Evidence from paleolimnology

Leavitt

Findlay

Hall

et al. 1999

Limnology & Oceanography

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Fossil pigment analyses and 19 year-long historical records were used to quantify whole-lake algal response to changes in optical and chemical properties following experimental acidification of Lake 302 with H 2 SO 4 (south basin, 302S; 1981-1989) or HNO 3 (north basin, 302N; 1982-1986) and HCl (1987HCl ( -1989. Undisturbed sediments were collected by freeze-coring, sectioned in approximately annual intervals, and analyzed for fossil carotenoids, chlorophylls, and derivatives by high performance liquid chromatography. Concentrations of fucoxanthin (diatoms, chrysophytes, some dinoflagellates) were correlated with algal standing crop (r 2 ϭ 0.67, P Ͻ 0. 05; 1978-1989) and increased 6-fold following acidification of Lake 302S with H 2 SO 4 from pH 6.6 to 5.0, consistent with observed reductions in dissolved organic carbon (DOC) from 7 to 4.5 mg liter Ϫ1 , improved water clarity, and increased biomass of deep-water chrysophytes. However, fucoxanthin concentrations declined to baseline values in sediments from 1988 to 1990, concomitant with severe acidification to pH 4.5, continued DOC loss (Ͻ1.5 mg liter Ϫ1 ) and an estimated 8-fold increase in the penetration of UVb radiation (UVR-b). Increased penetration of ultraviolet radiation (UVR) was recorded also by increased relative abundance of pigments characteristic of UVR-transparent environments. In contrast, pigments from green algae (Chl b, pheophytin b, lutein-zeaxanthin) doubled during acidification with H 2 SO 4 , while those from cryptophytes (alloxanthin) were unaffected and diatoxanthin from diatoms declined. Patterns of ubiquitous ␤-carotene, Chl a, and pheophytin a suggested that total algal biomass increased ϳ200-400% by the mid-1980s, but declined to near-baseline under severe acidification. Variance partitioning using redundancy analysis captured 80-83% of variation in fossil chlorophylls and carotenoids and suggested that the direct effects of pH were greater (ϳ50% of total variance) than those of irradiance (ϳ12%), but that ϳ20% of variance was attributable to factor interactions. Fossil concentrations of pigments from green algae and diatoms increased ϳ100% following acidification of Lake 302N to pH 6.1, but there were few signals of deep-water blooms, possibly because DOC remained 3.5-5.0 mg liter Ϫ1 . Such complex interactions between pH, DOC, and light may help explain the high variability of algal biomass response to lake acidification. Lake acidification can impact algal communities through both biotic and abiotic pathways (Fig. 1). To date, most research has focused on the direct effects of pH or associated factors (e.g., metals) on members of aquatic food webs (reviewed by Stokes 1986). Laboratory and field experiments

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“…Although Haptophyta are well known in marine systems (Moon-van der Staay et al, 2000; Iglesias-Rodriguez et al, 2002), especially because of their ability to form toxic blooms (Gjøsaeter et al, 2000;Baker et al, 2007), only a dozen Haptophyta species have been previously described from freshwater or terrestrial habitats (John et al, 2002). However, some haptophyte blooms have been previously recorded in different lacustrine systems (Nicholls et al, 1982;Hansen et al, 1994), suggesting an importance of this group in other freshwater ecosystems. Vertical structure of small eukaryotes C Lepère et al CCA plots revealed an opposite distribution between Chlorophyta and Haptophyta groups (Figure 4).…”

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confidence: 96%

Vertical structure of small eukaryotes in three lakes that differ by their trophic status: a quantitative approach

et al. 2010

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In lakes, the diversity of eukaryotic picoplankton has been recently studied by the analysis of 18S ribosomal RNA gene sequences; however, quantitative data are rare. In this study, the vertical structure and abundance of the small eukaryotic size fraction (0.2-5 lm) were investigated in three lakes by tyramide signal amplification-fluorescent in situ hybridization targeting six phylogenetic groups: Chlorophyta, Haptophyta, Cercozoa, LKM11, Perkinsozoa and fungi. The groups targeted in this study are found in all lakes; however, both the abundance and structure of small eukaryotes are dependent on the system's productivity and depth. These data highlighted the presence of Chlorophyta contributing on an average to 19.3%, 14.7% and 41.2% of total small eukaryotes in lakes Bourget, Aydat and Pavin, respectively. This study also revealed the unexpected importance of Haptophyta, reaching 62.8% of eukaryotes in the euphotic zone of Lake Bourget. The high proportions of these pigmented cells highlight the underestimation of these groups by PCR-based methods. The presence of pigmented Chlorophyta in the deepest zones of the lakes suggests a mixotrophic behaviour of these taxa. We also confirmed the presence of putative parasites such as Perkinsozoa (5.1% of small eukaryotes in Lake Pavin and Bourget) and, with lower abundances, fungi (targeted by the MY1574 probe). Cells targeted by LKM11 probes represented the second group of abundance within heterotrophs. Open questions regarding the functional roles of the targeted groups arise from this study, especially regarding parasitism and mixotrophy, which are interactions poorly taken into account in planktonic food web models.

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Lakewide odours in Ontario and New Hampshire caused by Chrysochromulina breviturrita Nich. (Prymnesiophyceae)

Cited by 34 publications

References 13 publications

Phytoplankton seasonal and vertical variations in a tropical shallow reservoir with abundant macrophytes (Ninféias Pond, Brazil)

Phytoplankton seasonal and vertical variations in a tropical shallow reservoir with abundant macrophytes (Ninféias Pond, Brazil)

Algal responses to dissolved organic carbon loss and pH decline during whole‐lakeacidification: Evidence from paleolimnology

Vertical structure of small eukaryotes in three lakes that differ by their trophic status: a quantitative approach

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