Pub Date : 2022-02-28DOI: 10.1080/10402381.2021.1905755
A. Horne, Rodney Jung
Abstract Horne, AJ, Jung R. 2022. Hypolimnetic oxygenation 5. Copper, zinc, iron, and manganese declines in Camanche Reservoir downstream of an abandoned mine. Lake Reserve. Manage. 38:139–149. An abandoned mine upstream of Camanche Reservoir in California had increased sediment copper (Cu) and zinc (Zn) concentrations by 10-fold. Regulators and environmentalists claimed that a hypolimnetic oxygenation system (HOS) on the reservoir bed would stir sediments and increase metal toxicity in the hypolimnetic water supplied to steelhead and Chinook salmon in the Mokelumne River and its large fish hatchery. On the contrary, after HOS, small decreases in the concentrations of Zn and Cu and large decreases in iron (Fe) and manganese (Mn) occurred. Before HOS, ΣCu concentrations were relatively low (mean deep, 3.3 µg/L, surface, 2.4 µg/L) but in the soft water sometimes exceeded an aquatic life criterion of 3 µg/L. After HOS, the long-term mean ΣCu dropped 12% to 2.9 µg/L (deep); surface concentrations were unchanged. Before HOS, bottom water ΣZn (mean = 17.7 µg/L) occasionally exceeded the criterion of 27 µg/L, but after HOS the long-term mean fell 36% to 11.3 µg/L. In contrast, ΣFe dropped 40-fold, dissolved Fe dropped 150-fold, ΣMn dropped 30-fold, and dissolved Mn dropped 400-fold. Fe and Mn declines were consistent with oxide precipitation. However, declines in Cu and Zn were due to homogenization of the deeper hypolimnion by mixing in the oxygenated HOS plume and not due to oxidation itself or the HOS-induced 79% reduction in algae. Important for reservoir management, HOS slightly reduced heavy metals in the reservoir outflows, benefiting the downstream river and fish hatchery. Similar results are predicted for mixing by aeration or propellers.
{"title":"Hypolimnetic oxygenation 5. Copper, zinc, iron, and manganese declines in Camanche Reservoir downstream of an abandoned mine","authors":"A. Horne, Rodney Jung","doi":"10.1080/10402381.2021.1905755","DOIUrl":"https://doi.org/10.1080/10402381.2021.1905755","url":null,"abstract":"Abstract Horne, AJ, Jung R. 2022. Hypolimnetic oxygenation 5. Copper, zinc, iron, and manganese declines in Camanche Reservoir downstream of an abandoned mine. Lake Reserve. Manage. 38:139–149. An abandoned mine upstream of Camanche Reservoir in California had increased sediment copper (Cu) and zinc (Zn) concentrations by 10-fold. Regulators and environmentalists claimed that a hypolimnetic oxygenation system (HOS) on the reservoir bed would stir sediments and increase metal toxicity in the hypolimnetic water supplied to steelhead and Chinook salmon in the Mokelumne River and its large fish hatchery. On the contrary, after HOS, small decreases in the concentrations of Zn and Cu and large decreases in iron (Fe) and manganese (Mn) occurred. Before HOS, ΣCu concentrations were relatively low (mean deep, 3.3 µg/L, surface, 2.4 µg/L) but in the soft water sometimes exceeded an aquatic life criterion of 3 µg/L. After HOS, the long-term mean ΣCu dropped 12% to 2.9 µg/L (deep); surface concentrations were unchanged. Before HOS, bottom water ΣZn (mean = 17.7 µg/L) occasionally exceeded the criterion of 27 µg/L, but after HOS the long-term mean fell 36% to 11.3 µg/L. In contrast, ΣFe dropped 40-fold, dissolved Fe dropped 150-fold, ΣMn dropped 30-fold, and dissolved Mn dropped 400-fold. Fe and Mn declines were consistent with oxide precipitation. However, declines in Cu and Zn were due to homogenization of the deeper hypolimnion by mixing in the oxygenated HOS plume and not due to oxidation itself or the HOS-induced 79% reduction in algae. Important for reservoir management, HOS slightly reduced heavy metals in the reservoir outflows, benefiting the downstream river and fish hatchery. Similar results are predicted for mixing by aeration or propellers.","PeriodicalId":18017,"journal":{"name":"Lake and Reservoir Management","volume":"38 1","pages":"139 - 149"},"PeriodicalIF":1.5,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41757876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-02-17DOI: 10.1080/10402381.2021.2022044
L. Costadone, M. Sytsma
Abstract Costadone L, Sytsma MD. 2022. Identification and characterization of urban lakes across the continental United States. Lake Reserv Manage. 38:126–138. Urban lakes contribute to the quality of life and sustainability of urban areas by providing a variety of ecosystems services. We defined and identified urban lakes across the continental United States; provided a comprehensive assessment of water quality, management activities, and ecosystem services; and determined how these systems compare to non-urban lakes. Lakes and reservoirs were identified as “urban” if they were completely within areas with at least 50,000 people, and in a subwatershed with a population density of at least 1000 people per square mile (386 people per square kilometer) and more than 10% of impervious cover. We identified 1950 urban lakes and reservoirs that were compared to a population of 2066 non-urban lakes identified from the National Lake Assessments. Urban lakes were smaller, shallower, and in a more disturbed condition than non-urban lakes due to high chlorophyll a (Chl-a) concentration, based on reference conditions for a given ecoregion. Analysis of the phosphorus–chlorophyll relationship at the ecoregional level revealed that there was a significant difference in the relationship between Chl-a and total phosphorus (TP) between urban and non-urban lakes in every ecoregion except in the Northern Appalachian, Xeric, and Upper Midwest ecoregions. A significantly higher proportion of urban lakes were eutrophic in all ecoregions, except in the Coastal Plains, Southern Plains, and Temperate Plains ecoregions. Urban lakes had different causes of water quality impairment compare to non-urban lakes. Given the differing ecological functioning, causes of impairment, and services provided, more targeted management may therefore be necessary to address the particular challenges urban lakes are facing.
{"title":"Identification and characterization of urban lakes across the continental United States","authors":"L. Costadone, M. Sytsma","doi":"10.1080/10402381.2021.2022044","DOIUrl":"https://doi.org/10.1080/10402381.2021.2022044","url":null,"abstract":"Abstract Costadone L, Sytsma MD. 2022. Identification and characterization of urban lakes across the continental United States. Lake Reserv Manage. 38:126–138. Urban lakes contribute to the quality of life and sustainability of urban areas by providing a variety of ecosystems services. We defined and identified urban lakes across the continental United States; provided a comprehensive assessment of water quality, management activities, and ecosystem services; and determined how these systems compare to non-urban lakes. Lakes and reservoirs were identified as “urban” if they were completely within areas with at least 50,000 people, and in a subwatershed with a population density of at least 1000 people per square mile (386 people per square kilometer) and more than 10% of impervious cover. We identified 1950 urban lakes and reservoirs that were compared to a population of 2066 non-urban lakes identified from the National Lake Assessments. Urban lakes were smaller, shallower, and in a more disturbed condition than non-urban lakes due to high chlorophyll a (Chl-a) concentration, based on reference conditions for a given ecoregion. Analysis of the phosphorus–chlorophyll relationship at the ecoregional level revealed that there was a significant difference in the relationship between Chl-a and total phosphorus (TP) between urban and non-urban lakes in every ecoregion except in the Northern Appalachian, Xeric, and Upper Midwest ecoregions. A significantly higher proportion of urban lakes were eutrophic in all ecoregions, except in the Coastal Plains, Southern Plains, and Temperate Plains ecoregions. Urban lakes had different causes of water quality impairment compare to non-urban lakes. Given the differing ecological functioning, causes of impairment, and services provided, more targeted management may therefore be necessary to address the particular challenges urban lakes are facing.","PeriodicalId":18017,"journal":{"name":"Lake and Reservoir Management","volume":"38 1","pages":"126 - 138"},"PeriodicalIF":1.5,"publicationDate":"2022-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44161113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-28DOI: 10.1080/10402381.2021.2017082
S. Hamilton, C. Murphy, S. Johnson, A. Pollock
Abstract Hamilton SK, Murphy CA, Johnson SL, Pollock A. 2022. Water quality ramifications of temporary drawdown of Oregon reservoirs to facitiliate juvenile Chinook salmon passage. Lake Reserv Manage. 38:165–179. Several high-head dams on the Willamette River system in Oregon create reservoirs that support the growth and survival of anadromous salmonids but may impede downstream passage of juvenile fishes, including the dam that creates the Fall Creek Reservoir (also known as Fall Creek Lake). Managers have been conducting brief “deep drawdowns” of Fall Creek Reservoir to promote downstream passage of juvenile threatened Chinook salmon (Oncorhynchus tshawytscha), and to reduce reservoir populations of invasive fish species that prey on or compete with salmon. Over 4 years we studied downstream water quality changes during these drawdowns, which reach the original stream level for short periods in late autumn. In other regions, drawdown of lakes and reservoirs can cause nutrient release and eutrophication, often in conjunction with erosion of within-reservoir sediment and export of fine sediment downstream. In this case, although large amounts of sediment were released at the lowest water levels, there were only modest increases in available nutrient concentrations that were ephemeral and unlikely to cause downstream eutrophication. In addition, although the oxygen demand of the released sediments was not high enough to further reduce dissolved oxygen downstream, very brief (1–2 h) drops in dissolved oxygen occurred immediately downstream as the reservoir water level approached streambed but did not appear to harm fishes. Sedimentation of downstream habitats is of concern, but careful management of the drawdown could mitigate sediment export because most export occurred at the lowest reservoir water levels. Suggestions for predicting and minimizing impacts from reservoir drawdowns are offered. Supplemental data for this article is available online at https://doi.org/10.1080/10402381.2021.2017082 .
{"title":"Water quality ramifications of temporary drawdown of Oregon reservoirs to facilitate juvenile Chinook salmon passage","authors":"S. Hamilton, C. Murphy, S. Johnson, A. Pollock","doi":"10.1080/10402381.2021.2017082","DOIUrl":"https://doi.org/10.1080/10402381.2021.2017082","url":null,"abstract":"Abstract Hamilton SK, Murphy CA, Johnson SL, Pollock A. 2022. Water quality ramifications of temporary drawdown of Oregon reservoirs to facitiliate juvenile Chinook salmon passage. Lake Reserv Manage. 38:165–179. Several high-head dams on the Willamette River system in Oregon create reservoirs that support the growth and survival of anadromous salmonids but may impede downstream passage of juvenile fishes, including the dam that creates the Fall Creek Reservoir (also known as Fall Creek Lake). Managers have been conducting brief “deep drawdowns” of Fall Creek Reservoir to promote downstream passage of juvenile threatened Chinook salmon (Oncorhynchus tshawytscha), and to reduce reservoir populations of invasive fish species that prey on or compete with salmon. Over 4 years we studied downstream water quality changes during these drawdowns, which reach the original stream level for short periods in late autumn. In other regions, drawdown of lakes and reservoirs can cause nutrient release and eutrophication, often in conjunction with erosion of within-reservoir sediment and export of fine sediment downstream. In this case, although large amounts of sediment were released at the lowest water levels, there were only modest increases in available nutrient concentrations that were ephemeral and unlikely to cause downstream eutrophication. In addition, although the oxygen demand of the released sediments was not high enough to further reduce dissolved oxygen downstream, very brief (1–2 h) drops in dissolved oxygen occurred immediately downstream as the reservoir water level approached streambed but did not appear to harm fishes. Sedimentation of downstream habitats is of concern, but careful management of the drawdown could mitigate sediment export because most export occurred at the lowest reservoir water levels. Suggestions for predicting and minimizing impacts from reservoir drawdowns are offered. Supplemental data for this article is available online at https://doi.org/10.1080/10402381.2021.2017082 .","PeriodicalId":18017,"journal":{"name":"Lake and Reservoir Management","volume":"38 1","pages":"165 - 179"},"PeriodicalIF":1.5,"publicationDate":"2022-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48889610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-02DOI: 10.1080/10402381.2021.2018631
Jesse W. Campbell, N. Libera, J. Smol, J. Kurek
Abstract Campbell J, Libera N, Smol JP, Kurek J. 2022. Historical impacts of mink fur farming on chironomid assemblages from shallow lakes in Nova Scotia, Canada. Lake Reserv Manage. 38:80–94. Mink fur farms in southwestern Nova Scotia, Canada, are a suspected source of nutrients that have likely contributed to water quality issues in nearby lakes. Despite a decade of water quality monitoring, the cumulative effects of mink farming are not fully known due to a lack of information regarding baseline conditions. We used sedimentary midge remains and visible reflectance spectroscopy of sedimentary chlorophyll a (VRS Chl-a) to assess environmental changes prior to and following the establishment and growth of the local mink farming industry. Study lakes include hypereutrophic Nowlans Lake, with mink farms near its shoreline, mesotrophic Porcupine Lake with mink farms upstream, and oligotrophic Clearwater Lake (reference lake) with no mink farms in the catchment. We recorded a significant compositional shift in midge assemblages at Nowlans Lake (ANOSIM: 0.63, P < 0.001) following an increase in VRS Chl-a and the growth of the industry ca. 1970. Midge assemblage changes were indicative of a deterioration of benthic habitat and included increases in taxa associated with productive environments (i.e., Glyptotendipes, Endochironomus, and Cricotopus). Porcupine and Clearwater lakes, however, showed no significant assemblage shifts, suggesting relatively stable benthic conditions. VRS Chl-a increased around the 1950s in Porcupine Lake, whereas VRS Chl-a in Clearwater Lake increased around the 1980s. Our findings indicate that impacts from mink farming should be considered from a site-specific context. This study highlights the complexity of shallow lake responses associated with human activities related to >50 yr of mink farming.
{"title":"Historical impacts of mink fur farming on chironomid assemblages from shallow lakes in Nova Scotia, Canada","authors":"Jesse W. Campbell, N. Libera, J. Smol, J. Kurek","doi":"10.1080/10402381.2021.2018631","DOIUrl":"https://doi.org/10.1080/10402381.2021.2018631","url":null,"abstract":"Abstract Campbell J, Libera N, Smol JP, Kurek J. 2022. Historical impacts of mink fur farming on chironomid assemblages from shallow lakes in Nova Scotia, Canada. Lake Reserv Manage. 38:80–94. Mink fur farms in southwestern Nova Scotia, Canada, are a suspected source of nutrients that have likely contributed to water quality issues in nearby lakes. Despite a decade of water quality monitoring, the cumulative effects of mink farming are not fully known due to a lack of information regarding baseline conditions. We used sedimentary midge remains and visible reflectance spectroscopy of sedimentary chlorophyll a (VRS Chl-a) to assess environmental changes prior to and following the establishment and growth of the local mink farming industry. Study lakes include hypereutrophic Nowlans Lake, with mink farms near its shoreline, mesotrophic Porcupine Lake with mink farms upstream, and oligotrophic Clearwater Lake (reference lake) with no mink farms in the catchment. We recorded a significant compositional shift in midge assemblages at Nowlans Lake (ANOSIM: 0.63, P < 0.001) following an increase in VRS Chl-a and the growth of the industry ca. 1970. Midge assemblage changes were indicative of a deterioration of benthic habitat and included increases in taxa associated with productive environments (i.e., Glyptotendipes, Endochironomus, and Cricotopus). Porcupine and Clearwater lakes, however, showed no significant assemblage shifts, suggesting relatively stable benthic conditions. VRS Chl-a increased around the 1950s in Porcupine Lake, whereas VRS Chl-a in Clearwater Lake increased around the 1980s. Our findings indicate that impacts from mink farming should be considered from a site-specific context. This study highlights the complexity of shallow lake responses associated with human activities related to >50 yr of mink farming.","PeriodicalId":18017,"journal":{"name":"Lake and Reservoir Management","volume":"38 1","pages":"80 - 94"},"PeriodicalIF":1.5,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41450420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-02DOI: 10.1080/10402381.2021.2007181
R. Hanson, June Hammond Rowan, Mark Green
Abstract Hanson R, Hammond Rowan J, Green M. 2022. As assessment of 2 watershed models to meet watershed planning needs. Lake Reserv Manage. 38:16–27. Watershed models provide a quantitative approach for estimating loads, providing source load estimates, and evaluating various management alternatives to determine the best and most efficient actions to reduce pollutant loads. For watershed plans to be approved by the US Environmental Protection Agency (EPA) and state agencies and to obtain Clean Water Act Section 319 funding, a modeling component is required. In this study, we tested 2 watershed quality models, STEPL and SWAT, in a New Hampshire watershed to determine, when there are limited data available, whether the investment of resources required for a more complex model produces a more accurate understanding of phosphorus loads for the purpose of watershed planning. We found that while a simple model such as STEPL does not provide understanding of the complexities and unique nature of different watersheds, it easily provides quantitative estimates of long-term mean pollutant loads that, based on available data and state guidance, are adequate for watershed planning purposes. A more sophisticated model, such as SWAT, can provide more insight into watershed dynamics, but to be used to its full potential it requires far more data and expertise than may exist in watershed groups and municipalities involved with applied watershed management planning. We recommend that watershed plans include goals for implementing studies that produce rich datasets and more sophisticated modeling as a long-term watershed management objective to improve understanding about watershed dynamics and predict how management actions will affect pollutant loads to achieve overall water quality improvement goals.
{"title":"An assessment of 2 watershed models to meet watershed planning needs","authors":"R. Hanson, June Hammond Rowan, Mark Green","doi":"10.1080/10402381.2021.2007181","DOIUrl":"https://doi.org/10.1080/10402381.2021.2007181","url":null,"abstract":"Abstract Hanson R, Hammond Rowan J, Green M. 2022. As assessment of 2 watershed models to meet watershed planning needs. Lake Reserv Manage. 38:16–27. Watershed models provide a quantitative approach for estimating loads, providing source load estimates, and evaluating various management alternatives to determine the best and most efficient actions to reduce pollutant loads. For watershed plans to be approved by the US Environmental Protection Agency (EPA) and state agencies and to obtain Clean Water Act Section 319 funding, a modeling component is required. In this study, we tested 2 watershed quality models, STEPL and SWAT, in a New Hampshire watershed to determine, when there are limited data available, whether the investment of resources required for a more complex model produces a more accurate understanding of phosphorus loads for the purpose of watershed planning. We found that while a simple model such as STEPL does not provide understanding of the complexities and unique nature of different watersheds, it easily provides quantitative estimates of long-term mean pollutant loads that, based on available data and state guidance, are adequate for watershed planning purposes. A more sophisticated model, such as SWAT, can provide more insight into watershed dynamics, but to be used to its full potential it requires far more data and expertise than may exist in watershed groups and municipalities involved with applied watershed management planning. We recommend that watershed plans include goals for implementing studies that produce rich datasets and more sophisticated modeling as a long-term watershed management objective to improve understanding about watershed dynamics and predict how management actions will affect pollutant loads to achieve overall water quality improvement goals.","PeriodicalId":18017,"journal":{"name":"Lake and Reservoir Management","volume":"38 1","pages":"16 - 27"},"PeriodicalIF":1.5,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47108985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-02DOI: 10.1080/10402381.2021.2013999
Michael J. J. Murphy, B. Sivarajah, D. Grègoire, J. Vermaire
Abstract Murphy MJJ, Sivarajah B, Grégoire DC, Vermaire JC. 2022. Assessing the ecological responses of a shallow mesotrophic lake to multiple environmental stressors using paleolimnological techniques. Lake Reserv Manage. 38:67–79. White Lake, located in southeastern Ontario, Canada is a long, shallow, multibasin lake that supports recreational activities year-round and has 1538 private and commercial dwelling units. The construction of a dam at Waba Creek in 1845 resulted in the minimum water level at White Lake increasing by ∼1.5 m, and several water-level management strategies have been implemented since the mid 20th century. The lake has also been impacted by land-clearance activities and shoreline development along the eastern shores and is presently mesotrophic. More recently, White Lake was colonized by zebra mussels (Dreissena polymorpha) in 2015, and annual algal blooms have also been observed. In this paleolimnological study, diatom-based approaches and loss on ignition were used to track past changes in water quality and sediment characteristics, respectively, to inform the White Lake Property Owners Association’s ongoing lake monitoring program. The diatom-inferred total phosphorus (DI-TP) reconstruction suggests that White Lake has been mesotrophic (DI-TP range 11.5 − 17 µg/L) over the past ∼200 years. Notable changes in the diatom assemblages and declines in sedimentary organic content were recorded around the 1890s in the sediment core retrieved near Hardwood Island. The decrease in sedimentary organic content was likely a response to early land-clearance activities around the lake as erosion often leads to greater inorganic export from the catchment to the lake. The switch among benthic fragilarioid diatom taxa suggests that the light conditions at this shallow lake may have changed in response to higher allochthonous inputs. Continuous monitoring of White Lake is needed to ensure that the cumulative impacts from emerging environmental stressors (e.g., climate-mediated changes, invasion by dreissenids) are considered when making management decisions.
{"title":"Assessing the ecological responses of a shallow mesotrophic lake to multiple environmental stressors using paleolimnological techniques","authors":"Michael J. J. Murphy, B. Sivarajah, D. Grègoire, J. Vermaire","doi":"10.1080/10402381.2021.2013999","DOIUrl":"https://doi.org/10.1080/10402381.2021.2013999","url":null,"abstract":"Abstract Murphy MJJ, Sivarajah B, Grégoire DC, Vermaire JC. 2022. Assessing the ecological responses of a shallow mesotrophic lake to multiple environmental stressors using paleolimnological techniques. Lake Reserv Manage. 38:67–79. White Lake, located in southeastern Ontario, Canada is a long, shallow, multibasin lake that supports recreational activities year-round and has 1538 private and commercial dwelling units. The construction of a dam at Waba Creek in 1845 resulted in the minimum water level at White Lake increasing by ∼1.5 m, and several water-level management strategies have been implemented since the mid 20th century. The lake has also been impacted by land-clearance activities and shoreline development along the eastern shores and is presently mesotrophic. More recently, White Lake was colonized by zebra mussels (Dreissena polymorpha) in 2015, and annual algal blooms have also been observed. In this paleolimnological study, diatom-based approaches and loss on ignition were used to track past changes in water quality and sediment characteristics, respectively, to inform the White Lake Property Owners Association’s ongoing lake monitoring program. The diatom-inferred total phosphorus (DI-TP) reconstruction suggests that White Lake has been mesotrophic (DI-TP range 11.5 − 17 µg/L) over the past ∼200 years. Notable changes in the diatom assemblages and declines in sedimentary organic content were recorded around the 1890s in the sediment core retrieved near Hardwood Island. The decrease in sedimentary organic content was likely a response to early land-clearance activities around the lake as erosion often leads to greater inorganic export from the catchment to the lake. The switch among benthic fragilarioid diatom taxa suggests that the light conditions at this shallow lake may have changed in response to higher allochthonous inputs. Continuous monitoring of White Lake is needed to ensure that the cumulative impacts from emerging environmental stressors (e.g., climate-mediated changes, invasion by dreissenids) are considered when making management decisions.","PeriodicalId":18017,"journal":{"name":"Lake and Reservoir Management","volume":"38 1","pages":"67 - 79"},"PeriodicalIF":1.5,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48671510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-02DOI: 10.1080/10402381.2021.2021335
N. Ward, M. Sorice, Mikaila S. Reynolds, K. Weathers, Weizhe Weng, C. Carey
Abstract Ward NK, Sorice MG, Reynolds MS, Weathers KC, Weng W, Carey CC. 2022. Can interactive data visualizations promote waterfront best management practices? Lake Reserv Manage. 38:95–108. Lake water quality management often requires private property owner engagement since land-use change generally occurs on private property. Educational components of lake management outreach must connect current property owner behaviors with future water quality. However, it may be challenging for property owners to associate their current behaviors with water quality outcomes due to the time lag between a behavior (e.g., fertilizer application) and a water quality outcome (e.g., decreased water clarity). Interactive data visualizations, characterized by user-determined selections that change visualization output, may be well suited to help property owners connect current behavior to future water quality. We tested the effectiveness of an online, interactive visualization as an educational intervention to alter property owners’ perspectives related to applying lawn fertilizer and installing waterfront buffers. We used cognitive psychology measures to quantify intervention effectiveness. Since property owners’ decision making may be driven by connections to their property, we also explored relationships between seasonal and permanent residents and intentions to apply fertilizer or install waterfront buffers and intervention effectiveness. Despite no significant difference in effectiveness between the interactive and noninteractive versions, the combined responses demonstrated a positive shift in behavioral beliefs and intentions related to lawn fertilizer application and waterfront buffer installation. Seasonal residents were less likely than permanent residents to apply lawn fertilizer before the intervention and more likely to shift their intentions after the intervention. This study provides evidence that brief educational interventions—regardless of their interactivity—can shift private property owner beliefs and intentions regarding lakefront property management.
{"title":"Can interactive data visualizations promote waterfront best management practices?","authors":"N. Ward, M. Sorice, Mikaila S. Reynolds, K. Weathers, Weizhe Weng, C. Carey","doi":"10.1080/10402381.2021.2021335","DOIUrl":"https://doi.org/10.1080/10402381.2021.2021335","url":null,"abstract":"Abstract Ward NK, Sorice MG, Reynolds MS, Weathers KC, Weng W, Carey CC. 2022. Can interactive data visualizations promote waterfront best management practices? Lake Reserv Manage. 38:95–108. Lake water quality management often requires private property owner engagement since land-use change generally occurs on private property. Educational components of lake management outreach must connect current property owner behaviors with future water quality. However, it may be challenging for property owners to associate their current behaviors with water quality outcomes due to the time lag between a behavior (e.g., fertilizer application) and a water quality outcome (e.g., decreased water clarity). Interactive data visualizations, characterized by user-determined selections that change visualization output, may be well suited to help property owners connect current behavior to future water quality. We tested the effectiveness of an online, interactive visualization as an educational intervention to alter property owners’ perspectives related to applying lawn fertilizer and installing waterfront buffers. We used cognitive psychology measures to quantify intervention effectiveness. Since property owners’ decision making may be driven by connections to their property, we also explored relationships between seasonal and permanent residents and intentions to apply fertilizer or install waterfront buffers and intervention effectiveness. Despite no significant difference in effectiveness between the interactive and noninteractive versions, the combined responses demonstrated a positive shift in behavioral beliefs and intentions related to lawn fertilizer application and waterfront buffer installation. Seasonal residents were less likely than permanent residents to apply lawn fertilizer before the intervention and more likely to shift their intentions after the intervention. This study provides evidence that brief educational interventions—regardless of their interactivity—can shift private property owner beliefs and intentions regarding lakefront property management.","PeriodicalId":18017,"journal":{"name":"Lake and Reservoir Management","volume":"38 1","pages":"95 - 108"},"PeriodicalIF":1.5,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43813424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-02DOI: 10.1080/10402381.2021.2009069
Nicholas D. Iraola, M. Mallin, L. Cahoon, D. Gamble, P. Zamora
Abstract Iraola ND, Mallin MA, Cahoon LB, Gamble DW, Zamora PB. 2022. Nutrient dynamics in a eutrophic blackwater urban lake. Lake Reserv Manage. 38:28–46. Greenfield Lake is a eutrophic blackwater urban lake in Wilmington, North Carolina, and in 2014 was declared by the state as impaired waters due to excessive chlorophyll a concentrations. Phytoplankton production is strongly nitrogen (N) limited, and the lake supports filamentous green algal blooms in spring and N-fixing cyanobacteria blooms in summer. To inform future lake restoration efforts, we quantified nutrient loads from 5 perennial streams that drain the highly impervious Greenfield Lake watershed to determine their impact on the lake’s eutrophic state. The 5 streams were sampled monthly from 2016 to 2017 during periods of dry weather and again after rain events of at least 1.2 cm to compare stormwater runoff to baseflow conditions. Two streams alone accounted for 76% of inorganic N and 63% of inorganic P surface inflow, whereas 2 other streams, despite high (53–74%) impervious coverage, had low loading. A lake-wide sediment phosphorus survey also revealed P accumulations mirrored streams of high nutrient load, while low P accumulations were in areas draining streams with large wetland and stormwater treatment areas. Drainage area was positively correlated with nitrate concentration and nitrate and ammonium loading. Unconventionally, percent impervious coverage was negatively correlated with nutrient concentrations and loads; we suspect that the presence of a large golf course in the watershed with the lowest impervious cover was a key driving factor. Our work also demonstrates the significance of catchment features: Drainages with large stormwater retention structures and significant natural wetlands in the lower reaches yielded low nutrient loadings.
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Pub Date : 2021-12-16DOI: 10.1080/10402381.2021.2001609
A. Sosiak
Abstract Sosiak A. 2021. Assessment of the hypolimnetic withdrawal system at Pine Lake, Alberta. Lake Reserv Manage. 38:47–66. In 1998, the Pine Lake Restoration Society (PLRS) installed a gravity-fed hypolimnetic withdrawal (HW) system in 4.13 km2 Pine Lake, Alberta, which had severe cyanobacterial blooms. Under HW, median euphotic total phosphorus (TP) declined by 27–32%, and chlorophyll a by 37–41%, typical of HW projects elsewhere. Furthermore, cyanobacterial blooms were less severe during HW. Decreasing hypolimnetic TP and internal loads suggest sediment P release declined in at least the middle basin under HW. There was no evidence of increased hypolimnetic temperatures during HW, which could have enhanced sediment P release. Summer hypolimnetic anoxia declined in the middle and south basins, while in winter anoxia declined in the north and middle basins. No change in TP occurred in 9 Alberta reference lakes, and external P loadings were not reduced by management efforts at Pine Lake, which suggests improvements were due to HW. After N declined during HW in Pine Lake, cyanobacteria shifted from a diverse community with species that fix atmospheric N, and others without that capacity, to one dominated by Aphanizomenon flos-aquae. Correlation analysis found Pine Lake blooms were associated with euphotic TP, total nitrogen (TN), earlier spring ice breakup, and higher air temperatures. Due to increased rainfall, the PLRS was able to operate the system more often than predicted. Pine Lake remains productive and the goal of mesotrophic productivity was not achieved. However, the anoxia analysis suggests lake productivity should decline appreciably by 2032 with continued HW operation. HW provides an affordable option for stratified lakes with high internal P loading. Supplemental data for this article is available online at https://doi.org/10.1080/10402381.2021.2001609 .
[摘要]Sosiak A. 2021。阿尔伯塔省松树湖低激素提取系统的评估。湖泊保护区管理。38:47-66。1998年，松树湖恢复协会(PLRS)在阿尔伯塔省4.13平方公里的松树湖安装了一个重力喂养的低通量提取(HW)系统，该系统有严重的蓝藻繁殖。在高低温条件下，绿光总磷(TP)中值下降了27-32%，叶绿素a下降了37-41%，与其他高低温项目相同。此外，蓝藻华在HW期间不那么严重。低通量总磷和内部负荷的减少表明，至少在高通量条件下，流域中部沉积物磷释放量有所下降。没有证据表明HW期间低代谢温度升高，这可能会增加沉积物P的释放。夏季低氧在中南部盆地下降，冬季低氧在中北部盆地下降。阿尔伯塔省9个参考湖泊的总磷没有发生变化，松湖的管理工作并未减少外部磷负荷，这表明改善是由于HW。在HW期间，松树湖的N下降后，蓝藻群落从一个具有固定大气N的物种和其他没有这种能力的物种的多样化群落转变为一个以aphanizomenafls -aquae为主的群落。相关分析发现，松湖水华与生光TP、总氮(TN)、春季破冰时间提前和气温升高有关。由于降雨增加，PLRS能够比预测更频繁地运行系统。松湖仍有生产力，但未达到中营养型生产力的目标。然而，缺氧分析表明，到2032年，随着水电的持续运行，湖泊生产力将明显下降。HW为具有高内部P负荷的分层湖泊提供了一种经济实惠的选择。本文的补充数据可在https://doi.org/10.1080/10402381.2021.2001609上在线获得。
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Pub Date : 2021-11-17DOI: 10.1080/10402381.2021.1992544
H. Haig, A. Chegoonian, J. Davies, D. Bateson, P. Leavitt
Abstract Haig HA, Chegoonian AM, Davies J-M, Bateson D, Leavitt PR. 2021. Marked blue discoloration of late winter ice and water due to autumn blooms of cyanobacteria. Lake Reserv Manage. 38:1–15. Continued eutrophication of inland waters by nutrient pollution can combine with unprecedented atmospheric and lake warming to create emergent environmental surprises. Here we report the first known occurrence of marked blue discoloration of ice and water in highly eutrophic prairie lakes during late winter 2021. Intense blue staining was reported first to governmental agencies by ice fishers in early March 2021, then communicated widely through social media, resulting in First Nations and public concern over potential septic field release, toxic spills, urban pollution, and agricultural mismanagement. Analysis of water from stained and reference sites using ultraviolet (UV)–visible spectrophotometry and high-performance liquid chromatography demonstrated that the blue color arose from high concentrations (∼14 mg/L) of the cyanobacterial pigment C-phycocyanin that was released after an unexpected bloom of Aphanizomenon flos-aquae in late October 2020 was frozen into littoral ice. Remote sensing using the Sentinel 3 A/B OLCI and Sentinel 2 A/B MSI satellite platforms suggested that blue staining encompassed 0.68 ± 0.24 km2 (4.25 ± 1.5% of lake surface area), persisted over 4 weeks, and was located within 50 m of the lakeshore in regions where fall blooms of cyanobacteria had been particularly dense. Although toxin levels were low (∼0.2 μg microcystin/L), high concentrations of C-phycocyanin raised public concern over eutrophication, pollution, and climate change, and resulted in rapid governmental and academic response. Given that climate change and nutrient pollution are increasing the magnitude and duration of cyanobacterial blooms, blue staining of lake ice may become widespread in eutrophic lakes subject to ice cover.
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