Pub Date : 2023-11-08DOI: 10.1080/10402381.2023.2260334
Donna J. Perleberg, Jesse P. Anderson, Andrew R. Streitz
AbstractPerleberg DJ, Anderson JP, Streitz AR. 2023. The recovery of a shallow lake within an agricultural landscape of Minnesota—an interdisciplinary approach to change. Lake Reserv Manage. XX:XXX–XXX.This case study of Lake Shaokatan, Minnesota, reveals how long-term climate, hydrology, water chemistry, and macrophyte data can explain and predict shallow lake phase shifts. After decades of agricultural landscape nutrient loadings, lake and watershed management efforts successfully reduced summer mean total phosphorus and chlorophyll a concentrations to levels that met standards set specifically for shallow lakes in the Northern Glaciated Plains ecoregion (0.09 mg/L and 0.03 mg/L, respectively). The lake “flipped” from a turbid, phytoplankton-dominated phase (<20% macrophyte occurrence) to a clear, macrophyte-dominated phase (annual average of 90% occurrence), and the Minnesota Pollution Control Agency removed it from the state’s impaired waters list. A paired groundwater and lake water quality investigation was critical in understanding how increased precipitation might affect lake water quality, the relationship between groundwater and surface water in this system, and how compounds such as chloride and phosphorus are transported through the watershed. Lakewide macrophyte occurrence has been sustained for at least 7 yr. While abundant macrophyte growth helps maintain a clear water state, it can also create recreational boating issues. Lake managers question how long the lake will remain in the present clear phase as lake users weigh the recreational and aesthetic differences between the 2 phases.Keywords: Chloridegroundwaterlong-term monitoringmacrophyteMinnesotamonitoring wellsnutrient impairmentshallow lake management AcknowledgmentsWe are indebted to the numerous staff from MDNR and MPCA who conducted field surveys and assisted with data management. We thank them and our agencies’ leadership for recognizing the value of long-term, multidiscipline monitoring. J. Lauer, S. Kloiber, and E. Smith provided review and helpful comments that improved this article.Disclosure statementNo potential conflict of interest was reported by the author(s).
【摘要】张建军，张建军，张建军，等。明尼苏达州农业景观中一个浅湖的恢复——一个跨学科的改变方法。湖泊保护区管理。XX: XXX-XXX。本研究以明尼苏达州绍卡坦湖为例，揭示了长期气候、水文、水化学和大型植物数据如何解释和预测浅湖相移。经过几十年的农业景观养分负荷，湖泊和流域管理工作成功地将夏季平均总磷和叶绿素a浓度降低到符合北部冰川平原生态区浅水湖泊专门设定的标准(分别为0.09 mg/L和0.03 mg/L)。该湖从浑浊的、浮游植物为主的阶段(大型植物的发生率<20%)“翻转”到清澈的、大型植物为主的阶段(年平均发生率为90%)，明尼苏达州污染控制机构将其从该州的受损水域名单中删除。地下水和湖泊水质成对调查对于了解降水增加如何影响湖泊水质，地下水和地表水在该系统中的关系，以及氯化物和磷等化合物如何通过流域运输至关重要。整个湖的大型植物的出现已经持续了至少7年。虽然大量的大型植物生长有助于保持清澈的水状态，但它也可能造成休闲划船的问题。当湖泊使用者权衡这两个阶段的娱乐和审美差异时，湖泊管理人员质疑湖泊将在目前的清澈阶段保持多久。关键词:氯化物地下水长期监测大型植物监测水体营养损害浅湖管理致谢感谢MDNR和MPCA的众多工作人员进行了实地调查并协助进行了数据管理。我们感谢他们和我们各机构的领导认识到长期、多学科监测的价值。J. Lauer, S. Kloiber和E. Smith提供了对本文进行改进的评论和有益的意见。披露声明作者未报告潜在的利益冲突。
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Pub Date : 2023-10-13DOI: 10.1080/10402381.2023.2259854
Brooke N. Mejica, Demian A. Ebert, Stacy K. Tanaka, Michael L. Deas
Mejica BN, Ebert DA, Tanaka SK, Deas ML. 2023. Managing cyanobacteria with a water quality control curtain in Iron Gate Reservoir, California. Lake Reserv Manage. XX:XXX–XXX.
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Pub Date : 2023-10-09DOI: 10.1080/10402381.2023.2248605
Stephen D. Shivers, Stephen W. Golladay, Matthew N. Waters, Susan B. Wilde, Nicholas S. Marzolf, Alan P. Covich
AbstractShivers SD, Golladay SW, Waters MN, Wilde SB, Marzolf NS, Covich AP. 2023. Invasive species interactions affect nutrient cycling in a shallow reservoir: a mesocosm experiment. Lake Reserv Manage. XX:XXX–XXX.Nonnative species’ introductions can affect nutrient dynamics as new combinations of species form novel ecosystems. This experiment investigated how combinations of 3 invasive species, 1 submerged macrophyte (Hydrilla) and 2 benthic invertebrates (Corbicula and Pomacea), affected nutrient cycling in a shallow reservoir, Lake Seminole, Georgia, United States. To assess these effects, an in-reservoir mesocosm array was installed using different combinations of the invasive species. Eight physical and chemical parameters of water quality were measured in all the mesocosms (1 control, 7 treatments) weekly for the duration of the 5 wk experiment. Nitrogenous compounds were strongly affected by Hydrilla and Pomacea presence, with NO3-N concentrations decreasing in Hydrilla mesocosms and NH4-N and total nitrogen (TN) increasing in Pomacea mesocosms. Corbicula, when present, helped to mitigate increases in N concentrations, presumably as filter feeding reduced water column TN concentration. Overall, Hydrilla growth reduced inorganic N concentration. Pomacea grazing converted stored N to available organic and particulate N. Total phosphorus concentrations were not impacted by the invasive species treatments and increased in all mesocosms during the experiment. In short, Hydrilla and Corbicula are contributing to the uptake, conversion, and sequestration of nutrients that may increase eutrophication, while Pomacea is releasing potentially eutrophying nutrients. As climate change and human influence continue to create new combinations of species, it is important to understand the effects produced by novel combinations of species.Keywords: Corbiculahydrillanonnative speciesnutrient processingPomacea AcknowledgmentsThe authors thank Brian Clayton, Bryan Cloninger, Nathalie Smith, Barry Shelton, and the Golladay lab for assistance in the field and laboratory. The authors thank Jean Brock for assistance with ArcGIS. The authors also thank 3 anonymous reviewers for their insightful comments on an earlier version of this article.Additional informationFundingFunding for this project was provided by the National Science foundation [DEB 1404160 to A. P. Covich and S. D. Shivers], the Jones Center at Ichauway, and the University of Georgia Graduate School.
【摘要】王志强，王志强，王志强，王志强。入侵物种的相互作用影响浅层水库的营养循环:一个中生态实验。湖泊保护区管理。XX: XXX-XXX。外来物种的引入可以影响营养动态，因为新的物种组合形成了新的生态系统。本实验研究了3种入侵物种，1种水下大型植物(水螅)和2种底栖无脊椎动物(Corbicula和Pomacea)的组合对美国佐治亚州塞米诺尔湖浅层水库养分循环的影响。为了评估这些影响，采用不同的入侵物种组合，在水库内安装了一个生态系统阵列。在为期5周的试验中，每周对所有中生态系统(1个对照，7个处理)的8项水质理化参数进行测定。水螅和Pomacea的存在对含氮化合物的影响较大，水螅中NO3-N浓度降低，Pomacea中NH4-N和总氮(TN)浓度升高。当Corbicula存在时，有助于缓解N浓度的增加，可能是由于过滤饲喂降低了水柱TN浓度。总体而言，水螅生长降低了无机氮浓度。放养Pomacea将储存态氮转化为速效态有机氮和颗粒态氮，但总磷浓度不受入侵物种处理的影响，且在试验期间各中生态系统中均有所升高。简而言之，水螅和Corbicula有助于吸收、转化和封存可能增加富营养化的营养物质，而Pomacea则释放潜在的富营养化营养物质。随着气候变化和人类的影响不断创造新的物种组合，了解新的物种组合所产生的影响是很重要的。关键词:Corbiculahydrillanonnative speciesnutrient processingPomacea AcknowledgmentsThe感谢作者布莱恩·克莱顿Bryan Cloninger娜塔莉·史密斯,巴里·谢尔顿,Golladay实验室协助现场和实验室。作者感谢Jean Brock对ArcGIS的帮助。作者还感谢3位匿名审稿人对本文早期版本的深刻评论。本项目的资金由国家科学基金会[DEB 1404160给A. P. Covich和S. D. Shivers]、伊乔韦的琼斯中心和佐治亚大学研究生院提供。
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