Journal of Great Lakes Research最新文献_第7页

A comparison of age-0 alewife energy content between two Lake Michigan habitats and year classes 两种密歇根湖栖息地和年级之间0岁大灰鲑能量含量的比较

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-03-01 DOI: 10.1016/j.jglr.2025.102546

Steven Pothoven , Les Warren , Tomas Höök

{"title":"A comparison of age-0 alewife energy content between two Lake Michigan habitats and year classes","authors":"Steven Pothoven , Les Warren , Tomas Höök","doi":"10.1016/j.jglr.2025.102546","DOIUrl":"10.1016/j.jglr.2025.102546","url":null,"abstract":"<div><div>The energy content and diet mass of juvenile alewife <em>Alosa pseudoharengus</em> was determined in Muskegon Lake, a drowned river mouth lake, and in the adjacent nearshore zone of Lake Michigan during summer and fall 2021 and 2022 and spring 2022 and 2023. Larger age-0 alewife had disproportionately higher total energy as a function of length than small alewife at both sites. Because age-0 alewife from Muskegon Lake grew to a larger average size, individuals had 43 and 204 % greater total energy content than in Lake Michigan in fall 2021 and 2022, respectively. Contrary to expectations, length-specific energy content declined from summer through fall each year, possibly related to declines in diet mass in the fall. Although diet mass was higher in 2021 than 2022, there were no differences in length-adjusted energy content between years during the fall in either lake. However, in Lake Michigan, the average length was much larger in fall 2021 (79 mm) than 2022 (66 mm) so that the average predicted total energy content in 2021 (20,889 J) was over twice that in fall 2022 (9852 J). Energy content declined over winter, but in spring 2023, small yearlings had surprisingly lost less size-adjusted energy than larger fish. Age-0 alewife had lower length-adjusted energy content in 2021 and 2022 than in 2001 and/or 2002 in both lakes. Nursery habitats such as the drowned river mouths where age-0 fish have higher diet mass and grow larger provide an energetic advantage over the main basin habitat of Lake Michigan.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 3","pages":"Article 102546"},"PeriodicalIF":2.4,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Effect of tilapia cage culture on algae and cyanobacteria communities in the bays of Bukavu basin, Lake Kivu, DR Congo 罗非鱼网箱养殖对刚果民主共和国基伍湖布卡武盆地海湾藻类和蓝藻群落的影响

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-02-28 DOI: 10.1016/j.jglr.2025.102547

Gabriel Balagizi Baguma , Mulongaibalu Mbalassa , Alfred Kabagale Cubaka , Alicet Bwanamudogo Irenge , Elysée Rutakaza Nzigire , Christine Cocquyt

{"title":"Effect of tilapia cage culture on algae and cyanobacteria communities in the bays of Bukavu basin, Lake Kivu, DR Congo","authors":"Gabriel Balagizi Baguma , Mulongaibalu Mbalassa , Alfred Kabagale Cubaka , Alicet Bwanamudogo Irenge , Elysée Rutakaza Nzigire , Christine Cocquyt","doi":"10.1016/j.jglr.2025.102547","DOIUrl":"10.1016/j.jglr.2025.102547","url":null,"abstract":"<div><div>Algae and cyanobacteria communities were monitored and associated with nutrients and anthropogenic activities in bays of the Bukavu basin of Lake Kivu (DR Congo). The monitoring was done to investigate the impact of Nile tilapia (<em>Oreochromis niloticus</em>) cage culture on algae and cyanobacteria communities in selected bays. Sampling was carried out from February to September 2021. In all selected bays, a standard quantity of water was filtered through a 10 µm mesh phytoplankton net for planktonic algae, while the epiphytic algae were scraped from cage net walls and macrophytes accordingly. The results revealed higher abundance of pollution-tolerant algae (diatoms) and cyanobacteria in the pilot bays than in the control bay, suggesting impacts of tilapia cages on the aquatic communities. The study detected a significant difference (<em>p</em> ≤ 0.05) in algal and cyanobacteria composition between the pilot and control bays; this could be associated with differences in fish cage and anthropogenic activities around the sampling sites. The study clearly highlighted the influence of nutrient inputs into the development of algae and cyanobacteria communities in the pilot bays, emphasizing the impact of both tilapia cage culture and anthropogenic activities on the alteration of water quality. Therefore, the study recommends relocation of the tilapia cages to bays that are not impacted or less impacted by anthropogenic activities, and to regulation of feed supply. Analyses should be done to elucidate ecological and nutritional importance of the algae and cyanobacteria communities for the development of tilapia cage culture in Lake Kivu.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 3","pages":"Article 102547"},"PeriodicalIF":2.4,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Improving geospatial coastal vulnerability indices for the Great Lakes 改进大湖区沿海地理空间脆弱性指数

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-02-28 DOI: 10.1016/j.jglr.2025.102544

Esther Acheampong , Don Lafreniere , Ryan Williams , Guy Meadows

{"title":"Improving geospatial coastal vulnerability indices for the Great Lakes","authors":"Esther Acheampong , Don Lafreniere , Ryan Williams , Guy Meadows","doi":"10.1016/j.jglr.2025.102544","DOIUrl":"10.1016/j.jglr.2025.102544","url":null,"abstract":"<div><div>In response to record-high water levels in the Great Lakes, there has been a notable surge in engineering interventions and the construction of armoring structures to mitigate shoreline erosion. However, the efficacy of these defensive measures against erosion and their broader implications for the physical vulnerability of coastal communities remain critical concerns. Our pilot study applied the Coastal Vulnerability Index (CVI) method to the Muskegon shoreline, enhancing it by calculating CVI values for individual parcels and integrating the shoreline rate of change and shoreline armaments. This approach localized variations and provided a precise understanding of factors influencing vulnerability. We found that using the shoreline rate of change allowed us to identify vulnerable areas prone to erosion due to dynamic shoreline processes and seasonal variations. In the study, seasonality significantly influenced vulnerability, particularly through ice cover, which aligns with findings on seasonal shoreline erosion risks from previous studies. It also underscores the importance of considering temporal dynamics in assessing coastal vulnerability in the Great Lakes region. We observed higher vulnerability in the northern and southern parts of the county’s shoreline compared to the central areas. Sites near heavily armored properties exhibited increased vulnerability, highlighting the complex impacts of shoreline armors on adjacent areas. The developed CVI holds the promise of providing coastal managers with invaluable insights. Specifically, it guides the reclassification of high-vulnerability areas and informs the formulation of policies that address the multifaceted challenges associated with shoreline armoring.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 4","pages":"Article 102544"},"PeriodicalIF":2.4,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

High abundance and diversity of flagellates under ice cover in Lake Baikal revealed by microscopy and metabarcoding 贝加尔湖冰盖下鞭毛虫丰富多样

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-02-27 DOI: 10.1016/j.jglr.2025.102545

Maria V. Bashenkhaeva, Yulia R. Zakharova, Yuri P. Galachyants, Darya P. Petrova, Mikhail M. Makarov, Maria V. Sakirko, Anna Yu. Bessudova, Ivan N. Smolin, Igor V. Khanaev, Yelena V. Likhoshway

{"title":"High abundance and diversity of flagellates under ice cover in Lake Baikal revealed by microscopy and metabarcoding","authors":"Maria V. Bashenkhaeva, Yulia R. Zakharova, Yuri P. Galachyants, Darya P. Petrova, Mikhail M. Makarov, Maria V. Sakirko, Anna Yu. Bessudova, Ivan N. Smolin, Igor V. Khanaev, Yelena V. Likhoshway","doi":"10.1016/j.jglr.2025.102545","DOIUrl":"10.1016/j.jglr.2025.102545","url":null,"abstract":"<div><div>Lakes located in the north temperate zone may be covered with ice for long periods. Under the ice, a habitat is created, different from the open water period, which is characterized by low temperature and reduced light due to ice and snow cover. We investigated phytoplankton in sub-ice communities (SI) at the ice-water interface and the 0–25 m under-ice water column communities (UW) in the pelagic zone of Lake Baikal. Community structure was assessed using microscopy and metabarcoding of fragments of 18S rRNA gene. Flagellate diversity included 34 taxa from 64 microalgae identified by microscopy and 48 operational taxonomic units (OTUs) from 56 identified by metabarcoding. In conditions of complete snow-covered ice, high diversity and abundance of flagellates (up to 14 million cells L<sup>−1</sup>) were observed, with an advantage due to their mobility and different feeding modes. Both microscopy and metabarcoding data show that the taxonomic structure of SI and UW is different. SI communities of Lake Baikal showed mass development of a mixed group of nanoflagellates, which consisted of “<em>Spumella-</em> and <em>Chlamydomonas</em>-like flagellates”. SI communities were less taxonomically diverse, suggesting that available resource gradients on the ice bottom are more tightly constrained, and taxa have to be ice bottom specialists to survive there. The relative spatial heterogeneity of SI communities is reflective of greater homogenization of habitat parameters in the winter water column and more dynamic conditions on the ice bottom. The data obtained expand the understanding of the diversity and abundance of organisms in under-ice habitats in north temperate latitudes.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 3","pages":"Article 102545"},"PeriodicalIF":2.4,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

New method for identification of natural and anthropogenic organic matter in receiving waters of pulp and paper mill discharge 纸浆和造纸厂排放污水中天然和人为有机物质鉴定的新方法

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-02-24 DOI: 10.1016/j.jglr.2025.102541

Maria Zobkova, Natalia Galakhina, Mikhail Zobkov

{"title":"New method for identification of natural and anthropogenic organic matter in receiving waters of pulp and paper mill discharge","authors":"Maria Zobkova, Natalia Galakhina, Mikhail Zobkov","doi":"10.1016/j.jglr.2025.102541","DOIUrl":"10.1016/j.jglr.2025.102541","url":null,"abstract":"<div><div>Pulp and paper mills (PPMs) are one of the most water-intensive industries in the world. Where sulphite pulping is used to produce pulp for paper and other products, lignosulfonates (LSF) dominate the organic component of PPM wastewaters. Currently, there is no information about the quantitative composition of organic matter (OM) and contribution of LSF to the OM pool in lakes and rivers located within the zone of PPMs’ influence. Addressing this gap in our understanding, a method was developed for the characterization of allochthonous (humic substances, HS) and anthropogenic (LSF) components of OM, and labile organic substances. The method is based on the extraction of HS from a water sample with DEAE-cellulose, introducing an experimentally determined adjustment coefficient for partial LSF sorption. The method was applied to the second largest freshwater lake in Europe, Lake Onego (also known as Onega), and its Kondopoga Bay, receiving wastewaters of Kondopoga PPM. The method’s effectiveness was demonstrated through spatial segregation of the river and wastewaters in the bay in different seasons, first as a source of HS, and the second as a source of LSF. The vertical distribution of the river and wastewaters was indicated using conductivity, temperature, and TP. The proposed method demonstrated that HS in Kondopoga Bay make up on average 63% of the total OM pool and 17% of labile OM. However, LSF accounts for an average of 20% and up to 39% of the total OM pool, which confirms the high degree of anthropogenic impact on water quality of the bay.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 2","pages":"Article 102541"},"PeriodicalIF":2.4,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143631888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

First evidence of lake trout Salvelinus namaycush spawning aggregation in Ohio waters of Lake Erie following reintroduction 第一个证据湖鳟鱼Salvelinus namaycush产卵聚集在俄亥俄州水域的伊利湖重新引入后

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-02-22 DOI: 10.1016/j.jglr.2025.102540

Benjamin J. Spitz , Graham F. Montague , Joseph D. Schmitt , Francesco Guzzo , Peter I. Jenkins

{"title":"First evidence of lake trout Salvelinus namaycush spawning aggregation in Ohio waters of Lake Erie following reintroduction","authors":"Benjamin J. Spitz , Graham F. Montague , Joseph D. Schmitt , Francesco Guzzo , Peter I. Jenkins","doi":"10.1016/j.jglr.2025.102540","DOIUrl":"10.1016/j.jglr.2025.102540","url":null,"abstract":"<div><div>Lake trout <em>Salvelinus namaycush,</em> an important apex predator native to Lake Erie, were extirpated by 1965 due to overexploitation, introduction of invasive species, and habitat degradation. Cooperative lake-wide lake trout stocking has been ongoing since 1982, with stocking strategies adapting as research identifies the age at stocking, locations, and strains that optimize the recovery of lake trout. Despite these efforts, limited evidence of lake trout spawning has been documented in the western half of Lake Erie. On 20 November 2023, n = 99 lake trout were captured via gillnet in Fairport Harbor, Ohio. This sample consisted largely of ripe adults (79.4 %) that were likely spawning within the vicinity of Fairport Harbor. Coded wire tags recovered from these fish revealed that most of these lake trout had been stocked in Fairport Harbor (99.0 %), were of the Seneca Lake strain (92.7 %), and were stocked as age-1 fish (93.7 %). This study demonstrates the survival of fish from Fairport Harbor stockings, suggests evidence of stocking-site fidelity, supports the stocking of the Seneca Lake strain, and suggests that stocking age-1 lake trout may have advantages over younger life stages. Most importantly, this study demonstrates that lake trout are likely spawning near Fairport Harbor. These findings can guide future studies that identify lake trout spawning habitat, recruitment bottlenecks, movement, and stocking-site fidelity in Lake Erie and can be used to inform future recovery strategies.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 2","pages":"Article 102540"},"PeriodicalIF":2.4,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143631818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Multidecadal patterns of coastal profile change reveal low likelihood of beach recovery following a period of high Lake Michigan water level 沿海剖面的多年代际变化模式表明，在密歇根湖高水位一段时间后，海滩恢复的可能性很低

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-02-22 DOI: 10.1016/j.jglr.2025.102537

Nathaniel H. Penrod , Ethan J. Theuerkauf , Guy A. Meadows , Lorelle A. Meadows

{"title":"Multidecadal patterns of coastal profile change reveal low likelihood of beach recovery following a period of high Lake Michigan water level","authors":"Nathaniel H. Penrod , Ethan J. Theuerkauf , Guy A. Meadows , Lorelle A. Meadows","doi":"10.1016/j.jglr.2025.102537","DOIUrl":"10.1016/j.jglr.2025.102537","url":null,"abstract":"<div><div>Coastal erosion is a hazard for sandy beaches along the Great Lakes of North America, especially during periods of high lake level. A barrier to managing these hazards is the lack of a process-based understanding of nearshore sediment transport and geomorphic connectivity. In this study, a multidecadal dataset of beach and nearshore profiles collected at six sandy beaches along the eastern coast of Lake Michigan and contemporaneous hydrodynamic data are utilized to quantify long-term boundaries of sediment transport during accretionary and erosive conditions. Our results indicate that at most sites longshore sediment transport is the dominant force shaping multidecadal profile evolution. Accretionary wave conditions can generally only transport sediment onshore from shallow sediment ridges of the inner nearshore and from the lower reaches of the subaerial beach in longshore drift. In contrast, erosive wave conditions can mobilize sediment from all areas of the profile and transport it offshore. Sediments stored in deeper nearshore bars can be activated by high-energy erosive wave conditions, but these features likely primarily function as multidecadal sinks for eroded beach sediment given the dominance of offshore-directed transport for these wave conditions. Furthermore, these results suggest that the likelihood of recovery following high lake level should decrease in this region as extensive coastal armoring reduces sediment availability and increases reflective wave energy in the accretionary wave-accessible portions of the nearshore. Ultimately, this study puts forth a simple method for predicting the likelihood of future beach recovery that can be used to help guide coastal management.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 4","pages":"Article 102537"},"PeriodicalIF":2.4,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Multiple stressors influencing the lakebed ecology of nearshore eastern Georgian Bay 影响东乔治亚湾近岸湖床生态的多重压力因素

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-02-20 DOI: 10.1016/j.jglr.2025.102542

E. Todd Howell , K. Stevack

{"title":"Multiple stressors influencing the lakebed ecology of nearshore eastern Georgian Bay","authors":"E. Todd Howell , K. Stevack","doi":"10.1016/j.jglr.2025.102542","DOIUrl":"10.1016/j.jglr.2025.102542","url":null,"abstract":"<div><div>Spanning two contrasting geological landforms, the heterogeneous landscape of eastern Georgian Bay comprises an archipelago of embayments, channels, and reefs that support a diverse benthic macroinvertebrate community. The exposed bedrock of the outer coastline contrasts with the mostly depositional silts of the inner coastline embayments bordering the Canadian Shield. Abundance of benthic algae and composition of benthic invertebrates were sampled over four regions and 50 km of coastline from Severn Sound to Shawanaga Island from 2014 to 2015, to assess where invasive dreissenid mussels and anthropogenic activity are impacting water quality or habitat conditions. Low surface cover and biomass of <em>Dreissena</em>, an absence of benthic macro-algae, and the lack of relationship between mussel occurrence and periphyton chlorophyll <em>a</em> on hard substrate of the more calcium-rich waters of the outer nearshore where dreissenids are found, suggests little effect of mussels on lakebed bio-physical structure. Further inshore, where dreissenids are largely absent, composition of benthic invertebrates in depositional sediments was influenced by physical makeup of substrate and the ubiquitous gradient in water quality from inshore to offshore associated with mixing of the drainage from watersheds on the Canadian Shield into the Lake Huron basin. Round goby (<em>Neogobius melanostomus</em>) was widely distributed over the outer coastline where visual sampling was conducted over hard substrate. The composition of oligochaetes on soft sediment is suggestive of anthropogenic enrichment at some sites. Collectively, the inherent physical–chemical habitat variability of the coastline accounts for much of the variability in the benthos.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 2","pages":"Article 102542"},"PeriodicalIF":2.4,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143631835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mapping Michigan’s historical coastlines 绘制密歇根历史上的海岸线

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-02-14 DOI: 10.1016/j.jglr.2025.102511

Ryan A. Williams, Daniel J. Lizzadro-McPherson, Guy Meadows

{"title":"Mapping Michigan’s historical coastlines","authors":"Ryan A. Williams, Daniel J. Lizzadro-McPherson, Guy Meadows","doi":"10.1016/j.jglr.2025.102511","DOIUrl":"10.1016/j.jglr.2025.102511","url":null,"abstract":"<div><div>A recently completed study has created and documented the first comprehensive compilation of spatio-temporal shoreline change for a significant portion of Lakes Michigan, Huron and Superior with historical snapshots dating back to 1938. In total, more than 4100 km was mapped at sufficient fidelity to allow resolution at the individual property owner level, allowing property owners, communities, regional managers and planners as well as regulatory agencies to directly observe not only natural changes to shorelines, but also anthropogenic impacts associated with shoreline hardening. Products produced by this study are publicly accessible via a geospatial data portal, and include historical aerial photography mosaics, historical shoreline and bluff line positions, long-term shoreline rate of change analysis input and outputs, and an interactive web-based viewer incorporating these products with other complementary datasets. Long-term rate of change analyses found that while some areas of Lakes Michigan and Huron exhibited isolated rates of recession greater than 1 m-per-year (m/yr), the majority of the shorelines were stable over the 82 years analyzed, with Lake Superior exhibiting the most stability (85 %), followed by Lake Huron (65 %), while Lake Michigan exhibited the lowest percentage of stable shorelines (52 %). Additionally, analysis of short-term rates-of-change shows the potential to detect shoreline hardening based on the variance between a transect’s short-term and long-term rates-of-change.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 4","pages":"Article 102511"},"PeriodicalIF":2.4,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Hydrologic connections in Apostle Islands coastal wetlands: Exploring dynamics and resilience to Lake Superior water level fluctuations Apostle群岛沿海湿地的水文联系：探索苏必利尔湖水位波动的动态和恢复力

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-02-14 DOI: 10.1016/j.jglr.2025.102538

Olivia C. Anderson, Sarah E. Johnson, Shea Schachameyer, Shelly L. Ray, Matthew J. Cooper

{"title":"Hydrologic connections in Apostle Islands coastal wetlands: Exploring dynamics and resilience to Lake Superior water level fluctuations","authors":"Olivia C. Anderson, Sarah E. Johnson, Shea Schachameyer, Shelly L. Ray, Matthew J. Cooper","doi":"10.1016/j.jglr.2025.102538","DOIUrl":"10.1016/j.jglr.2025.102538","url":null,"abstract":"<div><div>Coastal wetlands within Apostle Islands National Lakeshore (APIS) represent important reference ecosystems for Lake Superior given their relatively undegraded condition. However, this region lacks climate change-relevant nearshore bathymetric information for coastal wetlands, a gap our study helps fill. Since 2010, the Great Lakes, including Lake Superior, have experienced both extended low water levels and extreme highs. Such extremes are anticipated to increase in frequency and duration, but the exact outcomes are uncertain. Therefore, it is important to explore the resiliency of APIS wetlands against different water level scenarios. We studied seven wetlands with different geomorphic connections to Lake Superior (open, transient, or semi-permanent) and gathered water level and depth data. Using depth measurements, we created topo-bathymetric maps to investigate inundation patterns for various scenarios of Lake Superior water levels. Comparing wetland water levels to those of Lake Superior we found that water level patterns were unique per connection type, but that Lake Superior maintained baseline-water levels for all sites. Additionally, the wetlands we sampled demonstrated resiliency to substantial changes in water levels thanks to both bathymetry deeper than record low Lake Superior levels and sufficient undisturbed upslope habitats. However, the biotic communities within could shift in composition depending on future water level regimes. The increasing magnitude and frequency of Great Lakes water level fluctuations induced by climate change will influence all APIS coastal wetlands, regardless of connection type.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 2","pages":"Article 102538"},"PeriodicalIF":2.4,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143631821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0