The deep chlorophyll maximum layer of Lake Tahoe

Richerson, Peter J.; López, Matilde; Coon, Thomas G.

doi:10.1080/03680770.1977.11896543

Cited by 11 publications

(10 citation statements)

References 10 publications

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“…(2) Slow sedimentation rates of epilimnetic phytoplankton accumulated in the DCL: in lakes where it was found that the dominant species in the epilimnion were also important in the metalimnion and/or in the hypolimnion, slow rates of sedimentation explain this phenomenon (Richerson et al, 1978). In Lake Caviahue the dominant species were found along the water column and the other phytoplankton species were registered below the metalimnion in low abundance (Beamud, 2009).…”

Section: Discussionmentioning

confidence: 99%

“…These include (1) an increase in the chlorophyll a:cell size ratio at depths where light is scarce, (2) sedimentation of epilimnetic phytoplankton that accumulates in the DCL due to the slow sedimentation rates, (3) predation of phytoplankton in the epilimnion by either zooplankton or by other mixotrophic algae, (4) accumulation of mobile flagellates to avoid predation in the epilimnion and (5) availability of nutrients in the meta-hypolimnion. It is expected that several processes interact to control the distribution and magnitude of the DCL and DCM (Gotsis-Skretas et al, 1999;Richerson et al, 1978).…”

Section: Introductionmentioning

confidence: 99%

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Analysis of patterns of vertical and temporal distribution of phytoplankton using multifactorial analysis: Acidic Lake Caviahue, Patagonia, Argentina

Beamud¹,

Díaz²,

Baccalá³

et al. 2010

Limnologica

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a b s t r a c tMost existing studies on the algal communities of acid lakes are based on environments that have been caused by anthropogenic disturbances. Such lakes have a different origin compared to the natural acidic lakes and could be expected to differ also in the mechanisms controlling phytoplankton and trophic status. Planktonic community in Lake Caviahue is somewhat diverse in spite of the low pH of the water. Algae have a distinctive vertical distribution: the values of phytoplankton biomass remain constant throughout the water column and at times were highest in the upper end of the hypolimnion, forming a maximum or a layer of chlorophyll a at depth. The goal of this work was to investigate the factors influencing the seasonal and vertical distribution of phytoplankton. The lake was sampled between the years 2004 and 2006. Physical, chemical and biological parameters at different depths throughout the water column were determined. The interrelationships between environmental variables at different sampling dates were analyzed using an integration of multivariate matrices, multiple factor analysis, to analyze any joint partnerships in the samples. We found that phytoplankton biomass is dominated by Keratococcus rhaphidioides. With regard to zooplankton, we found a single species of rotifers (Philodina sp.). The two arms of the lake and the depths have different behaviours showing differences in the arms' conductivity, dissolved oxygen and pH. The more superficial layers were characterized by high values of phytoplankton and zooplankton biomass, organic and inorganic carbon, dissolved oxygen and pH. The deeper layers showed high values of chlorophyll a, ammonium and phosphorus (dissolved and particulate). From the multivariate analysis the relationships of the each algal species with pH, as a possible indicator of the degree of ''acidophilia'', could be extracted.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of patterns of vertical and temporal distribution of phytoplankton using multifactorial analysis: Acidic Lake Caviahue, Patagonia, Argentina

Beamud¹,

Díaz²,

Baccalá³

et al. 2010

Limnologica

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“…For example, some ciliate species are capable of utilizing a suite of potential prey items (e.g., Fenchel, 1987;Stoecker et al, 1986), and individual dinoflagellate and ciliate species have been shown to be capable of supplementing their nutrition through mixotrophy (e.g., Lessard & Swift, 1985;Stoecker et al, 1987, respectively). Deep subsurface maxima (DCL) are a common feature in large nutrient poor ecosystems (e.g., Richerson et al, 1978;Venrick, 1988). DCLÕs are present in many large lakes (e.g., Carrick et al, 2000;Barbeiro et al, 2001), developing shortly after thermal stratification, the dynamics of which has been well studied in Lake Michigan (see Fahnenstiel & Scavia, 1987b, c).…”

Section: Distribution Of Protozoa In Lake Michiganmentioning

confidence: 99%

An Under-appreciated Component of Biodiversity in Plankton Communities: The Role of Protozoa in Lake Michigan (A Case Study)

Carrick

2005

Hydrobiologia

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Recent technological advances have led to the discovery that free-living, planktonic protozoa are ubiquitous in nature and appear to be important components of pelagic food webs (e.g., fluorescent straining, flow cytometry). Despite this, limited information exists tying their seasonality to rate processes that drive succession patterns. The abundance, and seasonal growth and grazing loss of an entire protozoan assemblage were evaluated in Lake Michigan. The protozoan assemblage was species-rich (100 taxa) and abundant throughout the year in Lake Michigan. Nano-sized protozoa (Hnano and Pnano, <20 lm in size) ranged in abundance from 10 2 to 10 3 cells ml )1 , while micro-protozoa (Hmicro and Pmico, >20 and <200 lm in size) ranged in abundance from 4 to 17 cells ml )1 . The biomass of Hnano and Hmicro by itself represented more than 70-80% of crustacean zooplankton biomass, while Pnano and Pmicro constituted nearly 50% of phytoplankton biomass. Protozoa exhibited growth rates comparable to other components of the plankton in Lake Michigan, and some populations grew at rates similar to maximum rates determined in the laboratory (rates of 1-2 day )1 ). Overall, it appears that macro-zooplankton predation is a major loss factor counterbalancing growth with only small differences between the two rate processes (<0.1 day )1 ). Discrepancies between growth and grazing loss in the spring were likely attributed to sedimentation losses for larger species of tintinnids and dinoflagellates (Codonella, Tintinnidium, and Gymnodinium) that can account for their occurrence in the deep chlorophyll layer. In the summer, carnivory among similar sized species (Chromulina and small ciliates) may be additional loss factors impinging on the protozoan assemblage.

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“…These conditions would favour the growth of certain algae in the upper part of hypolimnion (St. Amand and Carpenter 1993). Increased algal densities below the thermocline have been related not only to nutrient availability (Fee et al 1977;Fasham et al 1985), but also to zooplankton grazing (Richerson et al 1978) and grazing-related increased vertical particle flux (Sarnelle 1999).…”

Section: Discussionmentioning

confidence: 99%

The variability of summer phytoplankton in different types of lakes in North East Poland (Suwałki Landscape Park)

Karpowicz

Górniak

Więcko

et al. 2016

Limnological Review

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This study describes summer phytoplankton communities in 27 lakes in the Suwałki Landscape Park (SLP) using in situ fluorescence methods. Low chlorophyll-a concentrations were noted in most of the studied lakes, particularly in the deepest lakes with highest surface area. Green algae, diatoms and cryptophyta were dominant components of lake phytoplankton. Higher chlorophyll-a concentrations in the shallow or more eutrophicated lakes were connected with an increase of cyanobacteria and cryptophyta concentrations as well as with a decrease in the share of diatoms inphytoplankton structure. Vertical distribution of phytoplankton in stratified lakes revealed the presence of deep chlorophyll layers just below the thermocline where the maximum concentrations of phytoplankton were up to 15 times higher than in the epilimnion zone. The deepest maximum concentration of phytoplankton was noted at a depth of 16.5 metres in Lake Jeglówek. In some lakes two or three significant increases of phytoplankton concentration in the vertical profile were observed, caused by intensive development of different algae groups.

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The deep chlorophyll maximum layer of Lake Tahoe

Cited by 11 publications

References 10 publications

Analysis of patterns of vertical and temporal distribution of phytoplankton using multifactorial analysis: Acidic Lake Caviahue, Patagonia, Argentina

Analysis of patterns of vertical and temporal distribution of phytoplankton using multifactorial analysis: Acidic Lake Caviahue, Patagonia, Argentina

An Under-appreciated Component of Biodiversity in Plankton Communities: The Role of Protozoa in Lake Michigan (A Case Study)

The variability of summer phytoplankton in different types of lakes in North East Poland (Suwałki Landscape Park)

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