Chemical and Physical Properties of Connecticut Lakes, With Emphasis on Regional Geology

Canavan, Richard W.; Siver, Peter A.

doi:10.1080/07438149409354189

Cited by 16 publications

(33 citation statements)

References 16 publications

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“…It is possible that the findings in this study could serve as a general benchmark for lake management and watershed development purposes for Connecticut lakes, especially for lakes situated in the geological zones referred to as the Eastern or Western Upland areas (Canavan and Siver 1994). Perhaps a goal of maintaining watersheds with greater than 80% forests or with less than 20% residential development could be used as a general target for planning purposes, especially if funding will limit more detailed analysis for a given waterbody.…”

Section: Discussionmentioning

confidence: 99%

“…The watersheds surrounding the study lakes range from being undeveloped (e.g., over 90% forested) to being highly developed (over 25% residential land cover). Much additional information on each lake and its watershed, including complete lake-water chemistry, morphological characteristics, watershed features, and geographical data are also given in previous papers (Canavan and Siver 1994;Field et al 1996;Siver et al 1996).…”

Section: Methodsmentioning

confidence: 99%

“…A total of 23 lakes that were reported on in previous studies (Canavan and Siver 1994;Siver et al 1996) and from which 210 Pb dates were estimated are included in this study (Table 1). Twenty-one of the 23 lakes are situated in, and representative of, waterbodies in the Eastern Uplands, Western Uplands, and Coastal Slope regions of Connecticut (Canavan and Siver 1994); these geological regions are underlain primarily with schists, gneiss, some granites, and other relatively resistant rocks.…”

Section: Methodsmentioning

confidence: 99%

“…Twenty-one of the 23 lakes are situated in, and representative of, waterbodies in the Eastern Uplands, Western Uplands, and Coastal Slope regions of Connecticut (Canavan and Siver 1994); these geological regions are underlain primarily with schists, gneiss, some granites, and other relatively resistant rocks. The watersheds surrounding the study lakes range from being undeveloped (e.g., over 90% forested) to being highly developed (over 25% residential land cover).…”

Section: Methodsmentioning

confidence: 99%

“…Although both the constant initial concentration (CIC) and the constant rate of supply (CRS) models were used to generate dates for the cores (Appleby and Oldfield 1978), because the sedimentation rates have changed in many of the lakes only the CRS dates were used to select the section of each core corresponding to 1890. Lake-water chemical data used to construct the inference models and the procedures used to obtain the data are discussed in detail in Canavan and Siver (1994) and . Values for specific conductivity and pH represent means from collections (n Ն 6) made throughout the year.…”

Section: Methodsmentioning

confidence: 99%

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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

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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.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

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

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Distribution and ecology of freshwater sponges in Connecticut

Santo

Fell

1996

Hydrobiologia

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A survey of Connecticut lakes and rivers revealed the presence of 7 species of freshwater sponge: Spongilla lacustris, Ephydatia muelleri, Eunapius fragilis, Anheteromeyenia ryderi, A. argyrosperma, Corvomeyenia carolinensis, and Corvospongilla novaeterrae in order of decreasing frequency of occurrence. Corvomeyenia carolinensis has not been reported previously beyond its type locality in South Carolina. In addition, microscleres of Spongilla lacustris, Anheteromeyenia-like megascleres, Ephydatia muelleri-like megascleres, and smooth megascleres (amphioxeas), which could not be assigned to a particular species, were found in surface sediments from lake cores. Spongilla lacustris inhabiting small rivers produced brown, thick-capsuled gemmules during the summer and yellow, thincapsuled gemmules during the fall. The thick-capsuled gemmules, but not the thin-capsuled gemmules, are tolerant of desiccation; and populations of Spongilla lacustris and Ephydatia muelleri survived severe drying of their habitats during the summer.

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Siver

1999

Journal of Paleolimnology

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Chemical and Physical Properties of Connecticut Lakes, With Emphasis on Regional Geology

Cited by 16 publications

References 16 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

Distribution and ecology of freshwater sponges in Connecticut

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