The effect of dreissenid invasions on chlorophyll and the chlorophyll : total phosphorus ratio in north-temperate lakes

We investigated the effects of dreissenid mussel ( Dreissena polymorpha and D. rostriformis bugensis ) invasions on the concentrations of chlorophyll a (Chl) and total phosphorus(TP), and the Chl:TP ratio within 27 north-temperate lakes that spanned large gradients in lake size and trophic status, using two approaches: (i) regression analysis and (ii) hierarchical modeling. Overall, Chl declined by 40%–45% after dreissenid invasion and the magnitude of effect was structured by epilimnetic volume within stratified, but not nonstratified (mixed) lakes. Declines in TP over the invasion period were significant only for stratified systems and were smaller (∼16% reduction from pre-invasion values) than for Chl. Across the complete trophic gradient (i.e., among lakes) the regression approach (analysis of covariance) indicated a significant decline in the intercept of the Chl:TP, but not the slope. In contrast, hierarchical modeling indicated a decline in the slope of Chl:TP among lakes between pre- and post-invasion periods. As with Chl, the effect of dreissenids on Chl:TP declined with increases in epilimnetic volume in stratified, but not nonstratified lakes. Dreissenid effects on Chl were prolonged, with no indication of diminishing within 7–10 years of invasion.

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Optimal sampling period for predicting phosphores and chlorophyll concentrations in north-temperate lakes

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f95-173 ◽

1995 ◽

Vol 52 (8) ◽

pp. 1812-1815 ◽

Cited By ~ 3

Author(s):

Robert L. France ◽

Robert H. Peters ◽

Robert H. Rishikof

Keyword(s):

Chlorophyll A ◽

Total Phosphorus ◽

Trophic Status ◽

Sampling Period ◽

Seasonal Patterns ◽

Optimal Sampling ◽

Temperate Lakes ◽

Empirical Relationships ◽

North Temperate Lakes ◽

Frequent Sampling

Because total phosphorus and chlorophyll a concentrations vary seasonally within north-temperate lakes, estimates of lake trophic status are usually based on several to many sampling visits. However, because such effort is not always logistically possible, the empirical relationships developed between these trophic status indicators may depend upon seasonal patterns of sampling. Clearly, it is desirable to know if some periods of the year are more likely to produce representative estimates of total phosphorus and chlorophyll a, or, alternatively, if sampling in other periods should be restricted or even avoided. Data from north-temperate lakes are used to examine the degree to which single monthly samples for total phosphorus and chlorophyll a represent seasonal means. Analyses indicate that the least precise and least accurate estimates of the means occur when single-visit synoptic surveys are conducted during April. Not until August to September do single sampling visits provide data that approximate those represented by the means garnered through more frequent sampling.

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Diversity and distribution of sediment bacteria across an ecological and trophic gradient

10.1101/2021.09.20.461123 ◽

2021 ◽

Author(s):

Hailey M. Sauer ◽

Trinity L. Hamilton ◽

Rika E. Anderson ◽

Charles E. Umbanhowar ◽

Adam J. Heathcote

Keyword(s):

Land Use ◽

Microbial Communities ◽

Trophic Status ◽

Chemical Properties ◽

Climatic Conditions ◽

Watershed Land Use ◽

Ecological Region ◽

North Temperate Lakes ◽

Similar Depth ◽

Lake Size

AbstractCan we cluster bacterial sediment communities based on lake size, depth, and trophic status? Or, are bacterial microbial communities an emergent property of their geography, integrating regional physical and climatic conditions? Lakes in Minnesota are uniquely situated to address these questions because of their wide geographic range and variability in size and basin land-use. In this study, we selected twenty lakes with varying morphological and chemical properties across four ecological regions of Minnesota. Our objectives were to (i)) evaluate the diversity and spatial variation of the bacterial community at the sediment-water interface and (ii) determine how lake location and watershed land-use impact aqueous chemistry and influence community structure. Our data indicate that sediment communities from similar depth intervals are more likely to cluster by ecological region rather than any individual lake properties (e.g., trophic status, TP concentration, lake depth). However, composition is tied to a given lake, wherein samples from the same core were more alike than samples at similar depths across lakes. Our results illustrate the diversity within lake sediment microbial communities and provide insight into relationships between taxonomy, physicochemical, and geographic properties of north temperate lakes.

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Water Quality, Phosphorus Budgets and Management of Dune Lakes Used for Recreation in Queensland (Australia)

Water Science & Technology ◽

10.2166/wst.1989.0036 ◽

1989 ◽

Vol 21 (2) ◽

pp. 111-118 ◽

Cited By ~ 2

Author(s):

A. H. Arthington ◽

G. J. Miller ◽

P. M. Outridge

Keyword(s):

Water Quality ◽

Total Phosphorus ◽

Trophic Status ◽

Compartment Model ◽

Phosphorus Concentration ◽

Lake Depth ◽

Total Phosphorus Concentration ◽

Dune Lakes ◽

Phosphorus Budgets ◽

Recreational Use

The water quality and trophic status of two Queensland dune lakes are compared in the context of assessing the impacts of recreational use and other human activities. Lake Freshwater, Cooloola, has a mean total phosphorus concentration of 12.1 ± 3.3 µg l−1 and is approaching mesotrophic status, whereas Blue Lagoon, Moreton Island, is oligotrophic. Natural loadings of total phosphorus, ranging from 0.2 to 0.35 g m−2 yr−1, are consistent with the progression of Lake Freshwater from oligotrophic to mesotrophic status. The phosphorus loadings predicted by Vollenweider's (1976) one-compartment model, for two values of mean lake depth, also indicate that Lake Freshwater is tending towards eutrophic conditions. The management implications of phosphorus loadings and budgets are discussed.

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Variability in phosphorus concentrations in north temperate lakes: A case study of anthropogenic forcing

SIL Proceedings 1922-2010 ◽

10.1080/03680770.1983.11897357 ◽

1984 ◽

Vol 22 (1) ◽

pp. 633-637

Author(s):

P. B. R. Archer ◽

B. Henderson-Sellers

Keyword(s):

Temperate Lakes ◽

Anthropogenic Forcing ◽

North Temperate Lakes

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Fluctuations of the population of Daphnia laevis Birge 1878: a six-year study in a tropical lake

Brazilian Journal of Biology ◽

10.1590/s1519-69842012000300010 ◽

2012 ◽

Vol 72 (3) ◽

pp. 479-487 ◽

Cited By ~ 12

Author(s):

LPM. Brandão ◽

T. Fajardo ◽

E. Eskinazi-Sant'Anna ◽

S. Brito ◽

P. Maia-Barbosa

Keyword(s):

Chlorophyll A ◽

Total Phosphorus ◽

Trophic State ◽

Trophic Status ◽

Seasonal Pattern ◽

Ecological Research ◽

Total Phosphorous ◽

Long Term Ecological Research ◽

Physical And Chemical

The fluctuation of the population of Daphnia laevis in Lake Jacaré (Middle River Doce, Minas Gerais) was monitored monthly (at one point in the limnetic region) for six years (2002-2007) as part of the Program of Long-Term Ecological Research (LTER/UFMG). The following parameters were also monitored: water temperature, pH, electrical conductivity, dissolved oxygen, chlorophyll a, total phosphorus, phosphate, total nitrogen, nitrate, nitrite, ammonia, and densities of Chaoborus and ephippia of Daphnia laevis in the sediment. A seasonal pattern was observed in the fluctuation of D. laevis, with higher densities recorded during periods of circulation (May-August). A significant correlation was found between the density of D. laevis and temperature (r = -0.47, p = 0.0001), chlorophyll-a (r = -0.32, p = 0.016) and indicators of the lake's trophic status (total phosphorus, r = 0.32, p = 0.007 and trophic state, r = 0.36, p = 0.003), as well as Chaoborus density (r = 0.43 and p = 0.002). These results indicate that changes in the physical and chemical characteristics of the water related with stratification and circulation of the lake may have a direct (temperature, total phosphorous) or an indirect (food availability, presence of predators, ephippia eclosion) influence on the fluctuation of the D. laevis population.

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The trophic status of Bidighinzu Reservoir (Sardinia) before and after the diversion of waste waters

Journal of Limnology ◽

10.4081/jlimnol.2001.1.135 ◽

2018 ◽

Vol 60 (2) ◽

pp. 135-142 ◽

Cited By ~ 7

Author(s):

Antonella LUGLIÈ ◽

Yelda AKTAN ◽

Paola CASIDDU ◽

Nicola SECHI

Keyword(s):

Chlorophyll A ◽

Total Phosphorus ◽

Trophic Status ◽

Water Reservoir ◽

Early Years ◽

Trophic Conditions ◽

Mean Values ◽

Annual Cycles ◽

Drinking Water Reservoir ◽

Before And After

The purpose of this paper was to assess the effect of the diversion of wastewater on the trophic status of Lake Bidighinzu, a hypertrophic man-made lake in Northern Sardinia, used as a drinking water reservoir. There have been problems with potabilization since the early years of the diversion operation, particularly in the summer-autumn period. Data available (August 1978, February 1979 and March 1985) before the reservoir (1987) were compared with those collected during a study carried out in the annual cycle immediately after (1988-1989) and after some years (1994 and 1996-1997). The study examined the dynamics of temperature, main nutrients (total phosphorus, nitrate and ammonia), chlorophyll-a and phytoplanktonic biomass. No particular variation in the water nutrient availability emerged from the comparison between these two situations - especially for total phosphorus, whose annual mean concentrations were similar in the two annual cycles (386 mg P m-3 in 1988-1989 and 305 mg P m-3 in 1996-1997). Chlorophyll-a and biomass were high during each period of study (annual mean values were 17 mg m-3and 3.7 mg l-1 in 1988-1989 and 11 mg m-3and 4.6 mg l-1 in 1996-1997). However, peaks were never higher than values recorded in August 1978 (112 mg m-3and 133 mg l-1) due to an extraordinary bloom of Ceratium hirundinella (O.F. Müller). Species composition of phytoplankton was typical of highly trophic conditions and was frequently characterised by the presence of Cyanophyceae and Bacillariophyceae. Results demonstrated that, ten years after construction of the by-pass, the lake had shown no improvement in its trophic status. This might depend on many factors, among which the most likely might be the non-use or partial use of the diversion system, which allows the sewage to continue to flow into the lake and keep its trophic status almost unchanged.

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Multiscale drivers of phytoplankton communities in north‐temperate lakes

Ecological Applications ◽

10.1002/eap.2102 ◽

2020 ◽

Vol 30 (5) ◽

Author(s):

Charlie J. G. Loewen ◽

Faye R. Wyatt ◽

Colleen A. Mortimer ◽

Rolf D. Vinebrooke ◽

Ron W. Zurawell

Keyword(s):

Temperate Lakes ◽

Phytoplankton Communities ◽

North Temperate Lakes

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Trophic Status and Phytoplankton Limitation Conditions in a Few Bulgarian and Hungarian Danube River Wetlands

Transylvanian Review of Systematical and Ecological Research ◽

10.1515/trser-2015-0084 ◽

2016 ◽

Vol 18 (2) ◽

pp. 19-28

Author(s):

Roumen Kalchev ◽

Árpád Berczik ◽

Michaela Beshkova ◽

Mária Dinka ◽

Hristina Kalcheva ◽

...

Keyword(s):

Chlorophyll A ◽

Total Nitrogen ◽

Total Phosphorus ◽

Trophic State ◽

Trophic Status ◽

Danube River ◽

Trophic State Index ◽

Secchi Disk ◽

State Index

Abstract The phytoplankton limitation conditions in a few Bulgarian and Hungarian wetlands and in two more sampling sites, one for each Danube stretch, were investigated by means of trophic state index of Carlson (1977) for phytoplankton chlorophyll-a (CHL), Secchi disk depths (SD), total phosphorus (TP), and total nitrogen (TN) concentrations. Phytoplankton of both river sites was not limited by non-algal turbidity, nor was they phosphorus and nitrogen limited. In summer months the studied wetlands were predominantly nitrogen limited, while in spring and autumn limitation by non-algal turbidity prevailed.

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Factors influencing Fish Assemblages and Species Richness in Subtropical Florida Lakes and a Comparison with Temperate Lakes

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f90-238 ◽

1990 ◽

Vol 47 (11) ◽

pp. 2137-2146 ◽

Cited By ~ 7

Author(s):

A. E. Keller ◽

T. L. Crisman

Keyword(s):

Species Richness ◽

Littoral Zone ◽

Trophic State ◽

Fish Assemblages ◽

Temperate Lakes ◽

Florida Lakes ◽

Factors Influencing ◽

Dissolved Aluminum ◽

The Impact ◽

Lake Size

From detailed analyses of 36 lakes, we determined that while species assemblages and richness change with lake size, trophic state, and pH, the responses were not as dramatic in Florida as in temperate lakes. At a given pH, there were more species in Florida lakes than in comparable lakes of the temperate zone. The impact of lake size on species richness was also less obvious in Florida lakes. The greater importance of centrarchids, increased contribution of the littoral zone to primary production, and lower dissolved aluminum levels may contribute to greater species richness in Florida lakes than in temperate lakes of comparable pH or size.

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