An expanded weighted-averaging model for inferring past total phosphorus concentrations from diatom assemblages in eutrophic British Columbia (Canada) lakes

Reavie, Euan D.; Hall, Roland I.; Smol, John P.

doi:10.1007/bf00682593

Cited by 126 publications

(100 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Brenner et al (1993) used such a method to estimate predisturbance chemical conditions in order to establish realistic lake restoration goals. In some instances it may be determined that restoration efforts may not benefit a given waterbody because the predisturbance conditions are found to be similar or worse than present-day conditions (e.g., Reavie et al 1995). The paleolimnological method utilized in this study is an effective means to indicate the amounts and rates of changes in individual lakes or suites of lakes, especially if background chemical data are lacking (Brenner et al 1993;Marsicano et al 1995).…”

Section: Discussionmentioning

confidence: 99%

Century changes in Connecticut, U.S.A., lakes as inferred from siliceous algal remains and their relationships to land‐use change

Siver

Lott

Cash

et al. 1999

Limnology & Oceanography

View full text Add to dashboard Cite

Scaled chrysophytes and planktonic diatoms are used to infer changes in lake water pH, specific conductivity, trophic score, and total nitrogen in 23 Connecticut waterbodies over the last 100 yr, and the changes are correlated with quantified changes in land use in the surrounding watersheds. In general, there was good agreement between the changes inferred from both organismal groups in this suite of lakes. Significant correlations were observed between chemical conditions inferred from organisms in surface sediments and present-day land uses, especially the percentages of the watersheds that are forest or residential land cover types. Approximately 20% of the waterbodies have significantly increased in pH since 1890, and none of the lakes have significantly declined in pH despite the fact that this region receives significant amounts of acidic deposition. These findings support previous work, indicating that the pH of Connecticut lakes has not declined over the recent past. One fourth of the lakes have significantly increased in specific conductivity, especially those situated in watersheds that have become highly residential in nature. Inferred specific conductivity has more than doubled in six of the lakes during the last century. Six of the lakes have become significantly more eutrophic, while only one lake has become more oligotrophic since 1890. The majority of the lakes situated in watersheds that have remained over ϳ80% forested have not significantly changed, whereas those that have become over ϳ25% residential have experienced the greatest amount of change. The potential influences of watershed-based alkalinity generation, winter road salt use, and implications of these findings in lake management are discussed.

show abstract

Section: Discussionmentioning

confidence: 99%

Century changes in Connecticut, U.S.A., lakes as inferred from siliceous algal remains and their relationships to land‐use change

Siver

Lott

Cash

et al. 1999

Limnology & Oceanography

View full text Add to dashboard Cite

show abstract

“…Nutrients in sediment as well as water are increased by eutrophication and, as a consequence, sediment fractions of total phosphorus and nitrogen, together with diatom records, are often used to evaluate the history of lake trophy (Christie & Smol, 1993;Reavie et al, 1995). However, little is known about the time course of nutrient enrichment or depletion in littoral sediments following eutrophication or restoration of lakes.…”

Section: Discussionmentioning

confidence: 99%

Aquatic macrophytes as tools for lake management

Melzer

1999

The Ecological Bases for Lake and Reservoir Management

103

113

View full text Add to dashboard Cite

Aquatic macrophytes can serve as useful indicators of water pollution along the littoral of lakes. In Bavaria, the submerged vegetation of about 100 lakes has been investigated by SCUBA diving over the past decade to evaluate the state of nutrient pollution. All lakes are marl lakes located in the northern calcareous alps and the prealpine region. The lakes differ in size, morphology, water residence time, nutrient loading, trophic status, recreational activities, and other characteristics. In all cases the entire shoreline of the lakes has been investigated. Among the investigated lakes are the three biggest Bavarian lakes, i.e. Lake Chiemsee, Lake Starnberg and Lake Ammersee. Mapping of the submerged vegetation occurred in four different depth zones, and variable shoreline sections. The length of each section was determined by the uniformity of the vegetation; as it changed, a new section was designated. Within each section and zone species were recorded and abundance of all observed macrophytes was estimated semi-quantitatively on a five-point scale. Nine different groups of macrophytes were recognised, including, in total, 45 different species of macrophytes. On the basis of this catalogue of indicator species, in combination with the abundance of the species, a 'macrophyte index' was devised, which ranges from 1 (unpolluted) to 5 (heavily polluted). Six groups of values of the macrophyte index, each represented by a different colour or grey-scale (in this publication), are presented to allow a clear illustration of the results. Important information for the successful restoration of lakes in Upper Bavaria has been obtained from the distribution patterns of the submerged vegetation. Many unknown waste water inflows or diffuse sources could be detected due to abrupt changes in the macrophyte index. Furthermore, the success of waste water removal by 'ring canalisation', resulting in a re-oligotrophication of many Bavarian lakes can be followed by changes in the macrophyte index.

show abstract

“…(Reavie et al, 1995a). Of the 48 dominant taxa in the 251-lake dataset (Table 2), only 22 are present in the smaller 64-lake dataset from B.C.…”

Section: Modern-day Calibration Datasetmentioning

confidence: 96%

“…Of the 48 dominant taxa in the 251-lake dataset (Table 2), only 22 are present in the smaller 64-lake dataset from B.C. with a range in taxa optima from 6 to 42 µg/L (Reavie et al, 1995a) in comparison to 4 to almost 100 µg/L in the 251-lake dataset. The estimates of taxa with high TP optima in the 251-lake dataset are underestimated in the 64-lake dataset (Reavie et al, 1995a), whereas taxa with low TP optima in the 251-lake dataset are overestimated.…”

Section: Modern-day Calibration Datasetmentioning

confidence: 99%

Tracking past changes in lake-water phosphorus with a 251-lake calibration dataset in British Columbia: tool development and application in a multiproxy assessment of eutrophication and recovery in Osoyoos Lake, a transboundary lake in Western North America

et al. 2015

View full text Add to dashboard Cite

Recently, there has been an active discussion about the potential and challenges of tracking past lake-water trophic state using paleolimnological methods. Herein, we present analyses of the relationship between modern-day diatom assemblages from the surface sediments of 251 fresh-water lakes from British Columbia and contemporary limnological variables. Total phosphorus (TP) was significantly related to the modern distribution of diatom assemblages. The large size of this new calibration dataset resulted in higher abundances and occurrences of many diatom taxa thereby allowing a more accurate quantification of the optima of diatom taxa to TP in comparison to previous smaller calibration datasets. Robust diatom-based TP inference models with a moderate predictive power were developed using weighted-averaging regression and calibration. Information from the calibration dataset was used to interpret changes in the diatom assemblages from the north and south basins of Osoyoos Lake, in conjunction with fossil pigment analyses. Osoyoos Lake is a large salmon-bearing lake that straddles the British Columbia-Washington border and has undergone cultural eutrophication followed by recovery due to substantial mitigation efforts in managing sources of nutrients. Both diatom assemblages and sedimentary pigments indicate that eutrophication began c. 1950 in the north basin and c. 1960 in the southern basin, reaching peak levels of production between 1960 and 1990, after which decreases in sedimentary pigments occurred, as well as decreases in the relative abundance and concentrations of diatom Cumming et al.Tracking eutrophication and recovery using Paleolimnology taxa inferred to have high TP optima. Post-1990 changes in the diatom assemblage suggests conditions have become less productive with a shift to taxa more indicative of lower TP optima in concert with measurements of declining TP, although two of these diatom taxa, Cyclotella comensis and Cyclotella gordonensis, that were previously rare are now abundant.

show abstract

An expanded weighted-averaging model for inferring past total phosphorus concentrations from diatom assemblages in eutrophic British Columbia (Canada) lakes

Cited by 126 publications

References 20 publications

Century changes in Connecticut, U.S.A., lakes as inferred from siliceous algal remains and their relationships to land‐use change

Century changes in Connecticut, U.S.A., lakes as inferred from siliceous algal remains and their relationships to land‐use change

Aquatic macrophytes as tools for lake management

Tracking past changes in lake-water phosphorus with a 251-lake calibration dataset in British Columbia: tool development and application in a multiproxy assessment of eutrophication and recovery in Osoyoos Lake, a transboundary lake in Western North America

Contact Info

Product

Resources

About