Pub Date : 2023-01-02DOI: 10.1080/10402381.2022.2160395
Jesse Naymik, C. Larsen, Ralph Myers, Charles Hoovestol, Nick Gastelecutto, Dain Bates
Abstract Naymik J, Larsen CA, Myers R, Hoovestol C, Gastelecutto N, Bates D. 2023. Long-term trends in inflowing chlorophyll a and nutrients and their relation to dissolved oxygen in a large western reservoir. Lake Reserv Manage. 39:53–71. Anoxia in Brownlee Reservoir is one of the numerous water quality issues associated with eutrophic conditions in the Snake River as it flows through southern Idaho and parts of eastern Oregon. The states of Idaho and Oregon have developed total maximum daily loads (TMDLs) for multiple reaches of the Snake River and its tributaries upstream of Brownlee Reservoir intended to address poor water quality. Despite the emphasis on developing TMDLs throughout the Snake River and its tributaries, published long-term trend monitoring to evaluate the results of the TMDLs is lacking. Trends in Snake River concentrations and loads summarized using weighted regressions on time, discharge, and season show that combined efforts to improve water quality upstream of Brownlee Reservoir have realized decreasing trends in concentrations of chlorophyll a, total phosphorus, and suspended solids (80%, 46%, and 61% reductions, respectively) from 1995 to 2021. Brownlee Reservoir, a large mainstem reservoir with short residence time, has responded quickly to inflowing reductions of chlorophyll a and total phosphorus. Since 2005, dissolved oxygen (DO) has improved in the reservoir, with a 33% reduction in the volume of the reservoir having DO less than 1 mg/L. This supports the primary premise of upstream TMDLs and demonstrates that inflowing water quality improvements are effective at improving in-reservoir dissolved oxygen.
[摘要]Naymik J, Larsen CA, Myers R, Hoovestol C, Gastelecutto N, Bates D. 2023。西部大型水库叶绿素a和营养物入流的长期趋势及其与溶解氧的关系湖泊保护区管理，39:53-71。布朗利水库的缺氧是与流经爱达荷州南部和俄勒冈州东部部分地区的斯内克河富营养化条件相关的众多水质问题之一。爱达荷州和俄勒冈州已经为Snake河及其支流的多个河段制定了总最大日负荷(TMDLs)，旨在解决水质差的问题。尽管强调在整个Snake河及其支流开发tmdl，但缺乏公开的长期趋势监测来评估tmdl的结果。利用时间、流量和季节加权回归对Snake河浓度和负荷趋势进行了总结，结果表明，从1995年到2021年，改善Brownlee水库上游水质的联合努力实现了叶绿素a、总磷和悬浮固体浓度的下降趋势(分别减少了80%、46%和61%)。布朗利水库是一个停留时间短的大型主水库，对入流叶绿素a和总磷的降低反应迅速。自2005年以来，油藏中的溶解氧(DO)得到了改善，DO低于1 mg/L的油藏体积减少了33%。这支持了上游tmdl的基本前提，并证明了入流水质改善对改善储层溶解氧是有效的。
{"title":"Long-term trends in inflowing chlorophyll a and nutrients and their relation to dissolved oxygen in a large western reservoir","authors":"Jesse Naymik, C. Larsen, Ralph Myers, Charles Hoovestol, Nick Gastelecutto, Dain Bates","doi":"10.1080/10402381.2022.2160395","DOIUrl":"https://doi.org/10.1080/10402381.2022.2160395","url":null,"abstract":"Abstract Naymik J, Larsen CA, Myers R, Hoovestol C, Gastelecutto N, Bates D. 2023. Long-term trends in inflowing chlorophyll a and nutrients and their relation to dissolved oxygen in a large western reservoir. Lake Reserv Manage. 39:53–71. Anoxia in Brownlee Reservoir is one of the numerous water quality issues associated with eutrophic conditions in the Snake River as it flows through southern Idaho and parts of eastern Oregon. The states of Idaho and Oregon have developed total maximum daily loads (TMDLs) for multiple reaches of the Snake River and its tributaries upstream of Brownlee Reservoir intended to address poor water quality. Despite the emphasis on developing TMDLs throughout the Snake River and its tributaries, published long-term trend monitoring to evaluate the results of the TMDLs is lacking. Trends in Snake River concentrations and loads summarized using weighted regressions on time, discharge, and season show that combined efforts to improve water quality upstream of Brownlee Reservoir have realized decreasing trends in concentrations of chlorophyll a, total phosphorus, and suspended solids (80%, 46%, and 61% reductions, respectively) from 1995 to 2021. Brownlee Reservoir, a large mainstem reservoir with short residence time, has responded quickly to inflowing reductions of chlorophyll a and total phosphorus. Since 2005, dissolved oxygen (DO) has improved in the reservoir, with a 33% reduction in the volume of the reservoir having DO less than 1 mg/L. This supports the primary premise of upstream TMDLs and demonstrates that inflowing water quality improvements are effective at improving in-reservoir dissolved oxygen.","PeriodicalId":18017,"journal":{"name":"Lake and Reservoir Management","volume":"39 1","pages":"53 - 71"},"PeriodicalIF":1.5,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42681103","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 : 2023-01-02DOI: 10.1080/10402381.2023.2173107
D. Marshall, Kenneth S. Wade, Jean M. L. Unmuth
Abstract Marshall DW, Wade K, Unmuth JL. 2023. Nitrate pollution and expansion of free-floating plants in 3 Lower Wisconsin River oxbow lakes. Lake Reserv Manage. 39:88–100. The Lower Wisconsin State Riverway (LWSR) in southwest Wisconsin is one of the highest quality large river floodplain ecosystems in the Midwest and is designated a Ramsar Wetland of International Importance. Oxbow lakes are important features of this floodplain ecosystem but many had become highly eutrophic by about 2011. Free-floating plants (FFP), comprised of duckweeds and filamentous algae, expanded in many groundwater-fed oxbow lakes along the LWSR. Beginning in 2013, we investigated possible causes of eutrophication. Our water pollution investigation indicated the primary oxbow water source is groundwater that flows beneath the cropland intensive Pleistocene sand terrace. The sand terrace aquifer delivers large amounts of NO3-N with concentrations that exceeded the federal and state Drinking Water Enforcement Standard (10 mg/L). Aquifer total phosphorus concentrations were orders of magnitude lower. NO3-N:total phosphorus (TP) ratios in terrace groundwater often exceeded 500:1. Estimated NO3-N loading rates were variable and ranged from 2989 kg/yr discharged to a 5.5 ha oxbow lake up to 33,091 kg/yr discharged to a 35 ha floodplain flowage. The results suggest coordinated groundwater and surface water quality protections are needed, and potentially Clean Water Act enforcement. Strategies designed to protect domestic water supplies beneath the sand terrace can reduce NO3-N pollution in the oxbow lakes. Addressing this issue could begin with adopting recommended surface water nitrogen criteria and developing FFP impairment criteria for LWSR oxbow lakes.
{"title":"Nitrate pollution and expansion of free-floating plants in 3 lower Wisconsin River oxbow lakes","authors":"D. Marshall, Kenneth S. Wade, Jean M. L. Unmuth","doi":"10.1080/10402381.2023.2173107","DOIUrl":"https://doi.org/10.1080/10402381.2023.2173107","url":null,"abstract":"Abstract Marshall DW, Wade K, Unmuth JL. 2023. Nitrate pollution and expansion of free-floating plants in 3 Lower Wisconsin River oxbow lakes. Lake Reserv Manage. 39:88–100. The Lower Wisconsin State Riverway (LWSR) in southwest Wisconsin is one of the highest quality large river floodplain ecosystems in the Midwest and is designated a Ramsar Wetland of International Importance. Oxbow lakes are important features of this floodplain ecosystem but many had become highly eutrophic by about 2011. Free-floating plants (FFP), comprised of duckweeds and filamentous algae, expanded in many groundwater-fed oxbow lakes along the LWSR. Beginning in 2013, we investigated possible causes of eutrophication. Our water pollution investigation indicated the primary oxbow water source is groundwater that flows beneath the cropland intensive Pleistocene sand terrace. The sand terrace aquifer delivers large amounts of NO3-N with concentrations that exceeded the federal and state Drinking Water Enforcement Standard (10 mg/L). Aquifer total phosphorus concentrations were orders of magnitude lower. NO3-N:total phosphorus (TP) ratios in terrace groundwater often exceeded 500:1. Estimated NO3-N loading rates were variable and ranged from 2989 kg/yr discharged to a 5.5 ha oxbow lake up to 33,091 kg/yr discharged to a 35 ha floodplain flowage. The results suggest coordinated groundwater and surface water quality protections are needed, and potentially Clean Water Act enforcement. Strategies designed to protect domestic water supplies beneath the sand terrace can reduce NO3-N pollution in the oxbow lakes. Addressing this issue could begin with adopting recommended surface water nitrogen criteria and developing FFP impairment criteria for LWSR oxbow lakes.","PeriodicalId":18017,"journal":{"name":"Lake and Reservoir Management","volume":"39 1","pages":"88 - 100"},"PeriodicalIF":1.5,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48368188","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 : 2023-01-02DOI: 10.1080/10402381.2022.2157781
Elizabeth J. Favot, C. Holeton, A. DeSellas, A. Paterson
Abstract Favot EJ, Holeton C, DeSellas AM, Paterson AM. 2023. Cyanobacterial blooms in Ontario, Canada: continued increase in reports through the 21st century. Lake Reserv Manage. 39:1–20. The Ontario Ministry of the Environment, Conservation and Parks samples algal composition in response to public reports of suspected algal blooms, which have been tracked since 1994. In a previous analysis, Winter et al. noted a significant increase in the number of reports of confirmed algal blooms dominated by cyanobacteria from 1994 to 2009. Here, we determined that this increasing trend in the yearly number of confirmed cyanobacterial bloom reports (CCBRs) has persisted in Ontario over the intervening decade, to 2019. More than half of CCBRs were from waterbodies on the Precambrian Shield, in the Georgian Bay (5E) ecoregion, known for cottaging and water-based tourism. Data from the Ontario Lake Partner Program (LPP) was used to investigate total phosphorus (TP) concentrations in waterbodies with CCBRs. Approximately 44% of the waterbodies with a CCBR (mean TP 12.99 µg/L, n = 135) had average spring TP concentrations less than 10 µg/L, compared to 64% for LPP waterbodies with no reported or confirmed cyanobacterial blooms (mean TP 9.79 µg/L, n = 918). The most common taxon of cyanobacteria dominating bloom samples in inland waterbodies was Dolichospermum, followed by Aphanizomenon in waterbodies on the Precambrian Shield, and Microcystis in the Mixedwood Plains ecozone in southern Ontario. While an increase in public awareness cannot be ruled out in contributing to the rise in CCBRs across Ontario, the high proportion of cyanobacterial blooms occurring in oligotrophic waterbodies suggests that there may be a link to climate warming, rendering conditions more favorable for these blooms to occur.
{"title":"Cyanobacterial blooms in Ontario, Canada: continued increase in reports through the 21st century","authors":"Elizabeth J. Favot, C. Holeton, A. DeSellas, A. Paterson","doi":"10.1080/10402381.2022.2157781","DOIUrl":"https://doi.org/10.1080/10402381.2022.2157781","url":null,"abstract":"Abstract Favot EJ, Holeton C, DeSellas AM, Paterson AM. 2023. Cyanobacterial blooms in Ontario, Canada: continued increase in reports through the 21st century. Lake Reserv Manage. 39:1–20. The Ontario Ministry of the Environment, Conservation and Parks samples algal composition in response to public reports of suspected algal blooms, which have been tracked since 1994. In a previous analysis, Winter et al. noted a significant increase in the number of reports of confirmed algal blooms dominated by cyanobacteria from 1994 to 2009. Here, we determined that this increasing trend in the yearly number of confirmed cyanobacterial bloom reports (CCBRs) has persisted in Ontario over the intervening decade, to 2019. More than half of CCBRs were from waterbodies on the Precambrian Shield, in the Georgian Bay (5E) ecoregion, known for cottaging and water-based tourism. Data from the Ontario Lake Partner Program (LPP) was used to investigate total phosphorus (TP) concentrations in waterbodies with CCBRs. Approximately 44% of the waterbodies with a CCBR (mean TP 12.99 µg/L, n = 135) had average spring TP concentrations less than 10 µg/L, compared to 64% for LPP waterbodies with no reported or confirmed cyanobacterial blooms (mean TP 9.79 µg/L, n = 918). The most common taxon of cyanobacteria dominating bloom samples in inland waterbodies was Dolichospermum, followed by Aphanizomenon in waterbodies on the Precambrian Shield, and Microcystis in the Mixedwood Plains ecozone in southern Ontario. While an increase in public awareness cannot be ruled out in contributing to the rise in CCBRs across Ontario, the high proportion of cyanobacterial blooms occurring in oligotrophic waterbodies suggests that there may be a link to climate warming, rendering conditions more favorable for these blooms to occur.","PeriodicalId":18017,"journal":{"name":"Lake and Reservoir Management","volume":"39 1","pages":"1 - 20"},"PeriodicalIF":1.5,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46138118","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 : 2023-01-02DOI: 10.1080/10402381.2022.2161436
R. Gorney, S. June, Karen M. Stainbrook, Alexander J. Smith
Abstract Gorney RM, June SG, Stainbrook KM, Smith AJ. 2023. Detections of cyanobacteria harmful algal blooms (cynanoHABs) in New York State, United States (2012–2020). Lake Reserv Manage. 39:21–36. Patterns in frequency, intensity, and duration of cyanobacteria harmful algal blooms (cyanoHABs) were evaluated in New York State from 2012 to 2020. The dataset included information from formal monitoring efforts, beach closures, and public reports. The total dataset included more than 24,000 records from 655 waterbodies and included cyanoHAB reports from 477 lakes. Nearly half of those lakes (49.6%) had only 1 year in which a cyanoHAB was documented. Less than 1% (6 lakes) had cyanoHABs documented in every year of the study. We noted a significant increase in the number of cyanoHABs reports each year (P < 0.001), but not an overall increase in intensity, based on evaluation of chlorophyll levels in mid-lake samples collected on a routine basis. The analysis indicated that cyanoHABs duration did not lengthen over the study period, based on beach closure data captured on a daily observation basis. This study addresses the limitations of monitoring data for analysis of patterns in cyanoHABs, based on the structure of the programs and frequency of observations. We provide retrospective feedback on the design of monitoring programs to improve future data collection and our ability to evaluate cyanoHABs in a wide range of waterbodies.
{"title":"Detections of cyanobacteria harmful algal blooms (cyanoHABs) in New York State, United States (2012–2020)","authors":"R. Gorney, S. June, Karen M. Stainbrook, Alexander J. Smith","doi":"10.1080/10402381.2022.2161436","DOIUrl":"https://doi.org/10.1080/10402381.2022.2161436","url":null,"abstract":"Abstract Gorney RM, June SG, Stainbrook KM, Smith AJ. 2023. Detections of cyanobacteria harmful algal blooms (cynanoHABs) in New York State, United States (2012–2020). Lake Reserv Manage. 39:21–36. Patterns in frequency, intensity, and duration of cyanobacteria harmful algal blooms (cyanoHABs) were evaluated in New York State from 2012 to 2020. The dataset included information from formal monitoring efforts, beach closures, and public reports. The total dataset included more than 24,000 records from 655 waterbodies and included cyanoHAB reports from 477 lakes. Nearly half of those lakes (49.6%) had only 1 year in which a cyanoHAB was documented. Less than 1% (6 lakes) had cyanoHABs documented in every year of the study. We noted a significant increase in the number of cyanoHABs reports each year (P < 0.001), but not an overall increase in intensity, based on evaluation of chlorophyll levels in mid-lake samples collected on a routine basis. The analysis indicated that cyanoHABs duration did not lengthen over the study period, based on beach closure data captured on a daily observation basis. This study addresses the limitations of monitoring data for analysis of patterns in cyanoHABs, based on the structure of the programs and frequency of observations. We provide retrospective feedback on the design of monitoring programs to improve future data collection and our ability to evaluate cyanoHABs in a wide range of waterbodies.","PeriodicalId":18017,"journal":{"name":"Lake and Reservoir Management","volume":"39 1","pages":"21 - 36"},"PeriodicalIF":1.5,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42940565","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 : 2022-10-02DOI: 10.1080/10402381.2022.2130118
Cade A. Lyon, Jacob L. Davis, M. Fincel, S. Chipps
Abstract Lyon CA, Davis JL, Fincel MJ, Chipps SR. 2022. Effects of capture depth on walleye hooking mortality during ice fishing. Lake Reserv Manage. 38:334–340. Length-based regulations are a common tool used to limit fishing mortality by controlling the size of fish harvested. While such regulations are helpful in managing fish populations, mortality associated with catch-and-release fishing may negatively impact a fishery. We evaluated factors affecting hooking mortality of walleye (Sander vitreus) in 2 mainstem Missouri River reservoirs in South Dakota. Winter walleye hooking mortality was evaluated during the ice fishing season in February and March 2020. After capture, walleye (n = 55) were placed into holding pens for 12 to 72 h to monitor postrelease mortality. Hooking mortality was found to be 20% following angling. Capture depth, landing time, and time in pen were the most influential variables on probability of hooking mortality (pm ). We observed a sharp increase in pm for walleye captured at depths from 10 to 12 m, where the probability of mortality for fish increased appreciably from 5 to 37%, respectively. Our findings indicate that hooking mortality during the ice fishing season can be substantial in lakes where walleye angling occurs at depths greater than 10 m.
Lyon CA, Davis JL, Fincel MJ, Chipps SR. 2022。捕深对冰钓时白眼鱼钩钩死亡率的影响。湖泊保护区管理。38:334-340。以长度为基础的规定是一种常用的工具，通过控制收获的鱼的大小来限制捕捞死亡率。虽然这些规定有助于管理鱼类种群，但与捕捞和释放捕捞有关的死亡率可能对渔业产生负面影响。本研究评估了南达科他州密苏里河2个主要水库中白眼鱼(Sander玻璃体)钩死的影响因素。在2020年2月和3月的冰钓季节，评估了冬季白眼鱼的捕捞死亡率。捕获后，将55只黄眼鱼放入笼中12 ~ 72 h，监测放生后死亡率。钓鱼后的死亡率为20%。捕获深度、着陆时间和围栏时间是影响钩死概率(pm)的主要变量。我们观察到在10至12米深度捕获的白眼鱼的pm急剧增加，鱼类的死亡率分别从5%明显增加到37%。我们的研究结果表明，在深度大于10米的湖泊中，冰钓季节的鱼钩死亡率可能很高。
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Pub Date : 2022-10-02DOI: 10.1080/10402381.2022.2129525
A. Prestigiacomo, S. June, R. Gorney, A. J. Smith, A. Clinkhammer
Abstract Prestigiacomo AR, June SG, Gorney RM, Smith AJ, Clinkhammer AC. 2022. An evaluation of a spectral fluorometer for monitoring chlorophyll a in New York State lakes. Lake Reserv Manage. 38:318–333. The quantification of chlorophyll a in surface waters through sampling and laboratory extraction methods has limitations, including the lack of phytoplankton composition analysis and delayed analysis time. Recently, automated instruments have been developed to quickly provide estimation of total chlorophyll a and characterize phytoplankton composition into functional groups. Here, we analyzed a dataset of paired, laboratory-extracted chlorophyll a samples (Chl-a) and chlorophyll a estimated from a spectrofluorometer (FluoroProbe, bbe Moldaenke; FPChl-a) for comparability at several time scales. We found that FPChl-a was highly correlated to Chl-a (r > 0.8) but overestimated Chl-a by 1.5–2 times on average. Summer average FPChl-a was higher than summer average Chl-a, resulting in incorrect lake evaluations against selected thresholds. Linear least squares regression of Chl-a/FPChl-a was highly significant (P < 0.01) and demonstrated a good fit (r2 > 0.75) but had high variability, consistent with FPChl-a performance values reported in the scientific literature. Factors such as FPChl-a magnitude and algal dominance were statistically important factors affecting the Chl-a/FPChl-a relationship. We developed a multiple linear regression method for postcalibrating FPChl-a to equivalent Chl-a values (adjusted FPChl-a) and applied it to the FPChl-a dataset. Adjusted FPChl-a values were unbiased and compared well with Chl-a (mean residual equal to 0 µg/L). Adjusted FPChl-a summer averages resulted in correct waterbody evaluation in more than 90% of lakes. We propose that the FluoroProbe, properly postcalibrated to adjusted FPChl-a, can be used as a surrogate of Chl-a in open water monitoring applications, reducing the need for traditional laboratory Chl-a samples for lake monitoring and management.
{"title":"An evaluation of a spectral fluorometer for monitoring chlorophyll a in New York State lakes","authors":"A. Prestigiacomo, S. June, R. Gorney, A. J. Smith, A. Clinkhammer","doi":"10.1080/10402381.2022.2129525","DOIUrl":"https://doi.org/10.1080/10402381.2022.2129525","url":null,"abstract":"Abstract Prestigiacomo AR, June SG, Gorney RM, Smith AJ, Clinkhammer AC. 2022. An evaluation of a spectral fluorometer for monitoring chlorophyll a in New York State lakes. Lake Reserv Manage. 38:318–333. The quantification of chlorophyll a in surface waters through sampling and laboratory extraction methods has limitations, including the lack of phytoplankton composition analysis and delayed analysis time. Recently, automated instruments have been developed to quickly provide estimation of total chlorophyll a and characterize phytoplankton composition into functional groups. Here, we analyzed a dataset of paired, laboratory-extracted chlorophyll a samples (Chl-a) and chlorophyll a estimated from a spectrofluorometer (FluoroProbe, bbe Moldaenke; FPChl-a) for comparability at several time scales. We found that FPChl-a was highly correlated to Chl-a (r > 0.8) but overestimated Chl-a by 1.5–2 times on average. Summer average FPChl-a was higher than summer average Chl-a, resulting in incorrect lake evaluations against selected thresholds. Linear least squares regression of Chl-a/FPChl-a was highly significant (P < 0.01) and demonstrated a good fit (r2 > 0.75) but had high variability, consistent with FPChl-a performance values reported in the scientific literature. Factors such as FPChl-a magnitude and algal dominance were statistically important factors affecting the Chl-a/FPChl-a relationship. We developed a multiple linear regression method for postcalibrating FPChl-a to equivalent Chl-a values (adjusted FPChl-a) and applied it to the FPChl-a dataset. Adjusted FPChl-a values were unbiased and compared well with Chl-a (mean residual equal to 0 µg/L). Adjusted FPChl-a summer averages resulted in correct waterbody evaluation in more than 90% of lakes. We propose that the FluoroProbe, properly postcalibrated to adjusted FPChl-a, can be used as a surrogate of Chl-a in open water monitoring applications, reducing the need for traditional laboratory Chl-a samples for lake monitoring and management.","PeriodicalId":18017,"journal":{"name":"Lake and Reservoir Management","volume":"38 1","pages":"318 - 333"},"PeriodicalIF":1.5,"publicationDate":"2022-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41910769","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 : 2022-10-02DOI: 10.1080/10402381.2022.2126806
Paul Julian, Zachariah C. Welch
Abstract Julian P II, Welch Z. 2022. Understanding the ups and downs: application of hydrologic restoration measures for a large subtropical lake. Lake Reserv Manage. 38:304–317. Hydrologic regimes in shallow lakes strongly influence the system’s function and ecology. Changes in water levels can have nonlinear, disproportionate effects in these low-gradient systems. High water levels can submerge upper elevation littoral areas, degrade benthic habitats, and redistribute sediments and nutrients throughout the lake. When water levels are low, wetland littoral areas are dried out, prompting shifts in plant communities. Lake Okeechobee, a large shallow lake, is a diverse and complex ecosystem managed for multiple purposes. Currently, water levels within the lake are managed based on the Lake Okeechobee Regulation Schedule of 2008, which is being replaced as restoration projects now are complete. The new regulation schedule, Lake Okeechobee System Operating Manual (LOSOM), updates water management rules while attempting to balance the needs of downstream systems; salinity and water quality in the Caloosahatchee and Saint Lucie estuaries; and more water for the southern Everglades. This study evaluates LOSOM relative to ecologically significant performance measures for the lake. Overall, the proposed regulation schedule is expected to cause deeper average lake levels, increased occurrence of damaging high-stage events, and reduced frequency of low-stage events. While decreases in the severity and frequency of low stages will be beneficial, increases in high stages may affect the long-term ecology of the system. As lake management shifts to optimize restoration efforts around and downstream of Lake Okeechobee, restoration projects upstream of the lake become critical to building and improving resilience in this central South Florida ecosystem.
[摘要]Julian P II, Welch Z. 2022。认识起伏:亚热带大型湖泊水文恢复措施的应用。湖泊保护区管理。38:304-317。浅湖的水文状况对系统的功能和生态影响很大。在这些低梯度系统中，水位的变化会产生非线性的、不成比例的影响。高水位会淹没高海拔沿海地区，降低底栖生物栖息地，并在整个湖泊中重新分配沉积物和营养物质。当水位低时，湿地沿岸地区干涸，促使植物群落发生变化。奥基乔比湖是一个大型浅湖，是一个多样化和复杂的生态系统，有多种用途。目前，湖中的水位是根据2008年的《奥基乔比湖管理计划》管理的，随着修复工程的完成，该计划正在被取代。新的管理时间表，奥基乔比湖系统操作手册(LOSOM)，更新了水管理规则，同时试图平衡下游系统的需求;卡卢萨哈奇河口和圣露西河口的盐度和水质;为南部大沼泽地提供更多的水。本研究评估了LOSOM相对于湖泊的生态显著性能指标。总体而言，拟议的监管计划预计将导致平均湖泊水位上升，破坏性高阶段事件的发生增加，低阶段事件的发生频率降低。虽然降低低阶段的严重程度和频率将是有益的，但高阶段的增加可能会影响系统的长期生态。随着湖泊管理转向优化奥基乔比湖周围和下游的恢复工作，湖泊上游的恢复项目对于建立和提高南佛罗里达中部生态系统的恢复能力至关重要。
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Pub Date : 2022-10-02DOI: 10.1080/10402381.2022.2157666
{"title":"NALMS Seeks Editor-in-Chief for Lake and Reservoir Management","authors":"","doi":"10.1080/10402381.2022.2157666","DOIUrl":"https://doi.org/10.1080/10402381.2022.2157666","url":null,"abstract":"","PeriodicalId":18017,"journal":{"name":"Lake and Reservoir Management","volume":"38 1","pages":"287 - 287"},"PeriodicalIF":1.5,"publicationDate":"2022-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49035297","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 : 2022-09-07DOI: 10.1080/10402381.2022.2109534
John R. Jones, D. Obrecht, A. Thorpe
Abstract Jones JR, Obrecht DV, Thorpe AP. 2022. Limnological characteristics of Lake of the Ozarks (Missouri, USA): long-term assessment following formation of a reservoir series. Lake Reserv Manage. 38:288–303. Impoundment of Truman Lake in 1980 on the Osage River, above Lake of the Ozarks (LOTO), created a reservoir series. This analysis details the changes and processes over the ensuing 35 yr (1980–2014) in this large impoundment dominated by a longitudinal gradient along the mainstem. Temporal variation was determined by hydrology; seasonal mean total phosphorus (TP) ranged between 12 and 58 µg/L at the near-dam location, and hydrologic flushing during summer explained 82% of this variation. After dam closure, mineral suspended solids, attributed to channel scouring of erodible materials in the tailwater reach, declined over time, with a 50% reduction near the dam. Concurrently, organic suspended solids increased by 1 to 4%/yr in mid-reach locations, which indicates greater autotrophic production. Compared with other Missouri reservoirs, algal chlorophyll (Chl) averaged 1.6 times the value predicted from TP. Ratios of Chl:TP have increased over past decades concurrent with an increase in organic suspended solids and expansion of the ultraplankton (<11 µm) fraction of total Chl. Warm and dry conditions are associated with an increase in Chl in the ultra fraction, suggesting climate influence. A comparison with data collected prior to the closure of Truman Dam (1976–1979) provides incontrovertible evidence that light transmission has improved, and both Chl and Chl:TP have increased in LOTO. Formation of a reservoir series resulted in immediate and long-term changes in this major impoundment.
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Pub Date : 2022-09-06DOI: 10.1080/10402381.2022.2076634
L. Costadone, M. Sytsma
Abstract Costadone L, Sytsma MD. 2022. Effect of alternative regional urban growth scenarios on a major urban lake. Lake Reserv Manage. 38:228–239. Land use management decisions developed at the regional scale that are intended to optimize environmental quality could have negative results at a local scale. We downscaled 3 regional urban growth scenarios (low, medium, and high land conversion) to a watershed scale and assessed how different regional land-use scenarios can impact important ecosystem services provided by a major urban lake. The scenario that depicted a low land conversion and concentrated future urban growth within an urban growth boundary at the regional scale resulted in a high-density development in the area surrounding the lake at the watershed scale. This type of development resulted in an increase of more than 30% in external phosphorus input to the lake compared to current conditions. Higher external phosphorus input will likely lead to water quality deterioration, with detrimental consequences for the ecosystem services provided by the lake. Our model forecasted a reduction of 3 to 4 m in lake water transparency, which will diminish recreational benefits provided by the lake and degrade wildlife habitat. In the next decades, population growth and land conversion will likely cause the resurgence of serious eutrophication symptoms. The reinforcement of nutrient management practices in the lake watershed will be necessary to offset the negative impact of urbanization from regional scale planning. Land-use policies developed at regional scales should consider trade-offs that impact highly valued local sources of ecosystem services.
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