Journal of Great Lakes Research最新文献_第5页

Influence of stormwater management ponds on chloride transport to urban headwater streams

IF 2.4 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2024-12-01 DOI: 10.1016/j.jglr.2024.102442

Hafsa Momin , Cody Ross , Wyatt Weatherson , Jennifer Drake , Claire Oswald

Sodium chloride (NaCl) is the most common de-icing agent used on roads and parking lots in North America. During the winter and spring, chloride (Cl⁻) is readily transported from paved surfaces to stormwater management facilities in a matter of hours to days. According to earlier studies, densimetric stratification in end-of-pipe stormwater management facilities such as wet stormwater management ponds (SWMPs) can result in latencies in Cl⁻ transport to receiving waters. As a result, wet SWMPs may generate Cl⁻ pulses in streams that exceed thresholds of acute toxicity to aquatic biota. This study identified the prevalence of this phenomenon at five headwater streams receiving discharge from wet SWMPs within the Greater Toronto Area over two years. All receiving streams in this study experienced exceedances of the chronic CWQG for Cl⁻ downstream of the SWMP outlet, while only some experienced exceedances of the acute CWQG for Cl⁻. For most of the salting season, SWMP contributions exacerbate downstream Cl⁻ concentrations, and occasionally are the primary driver of exceedances. Bottom-draw SWMPs were found to accumulate Cl⁻ and flush rapidly following a rain or melt event. Top-draw SWMPs accumulated Cl⁻ throughout the salting season and released diluted concentrations of Cl⁻ near the end of the season. Streams with large upstream catchments diluted SWMP contributions and ameliorated downstream Cl⁻ concentrations.

{"title":"Influence of stormwater management ponds on chloride transport to urban headwater streams","authors":"Hafsa Momin , Cody Ross , Wyatt Weatherson , Jennifer Drake , Claire Oswald","doi":"10.1016/j.jglr.2024.102442","DOIUrl":"10.1016/j.jglr.2024.102442","url":null,"abstract":"<div><div>Sodium chloride (NaCl) is the most common de-icing agent used on roads and parking lots in North America. During the winter and spring, chloride (Cl<sup>−</sup>) is readily transported from paved surfaces to stormwater management facilities in a matter of hours to days. According to earlier studies, densimetric stratification in end-of-pipe stormwater management facilities such as wet stormwater management ponds (SWMPs) can result in latencies in Cl<sup>−</sup> transport to receiving waters. As a result, wet SWMPs may generate Cl<sup>−</sup> pulses in streams that exceed thresholds of acute toxicity to aquatic biota. This study identified the prevalence of this phenomenon at five headwater streams receiving discharge from wet SWMPs within the Greater Toronto Area over two years. All receiving streams in this study experienced exceedances of the chronic CWQG for Cl<sup>−</sup> downstream of the SWMP outlet, while only some experienced exceedances of the acute CWQG for Cl<sup>−</sup>. For most of the salting season, SWMP contributions exacerbate downstream Cl<sup>−</sup> concentrations, and occasionally are the primary driver of exceedances. Bottom-draw SWMPs were found to accumulate Cl<sup>−</sup> and flush rapidly following a rain or melt event. Top-draw SWMPs accumulated Cl<sup>−</sup> throughout the salting season and released diluted concentrations of Cl<sup>−</sup> near the end of the season. Streams with large upstream catchments diluted SWMP contributions and ameliorated downstream Cl<sup>−</sup> concentrations.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"50 6","pages":"Article 102442"},"PeriodicalIF":2.4,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142063","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

Phosphorus loading to nearshore waters from legacy septic system groundwater plumes in a Great Lakes coastal community

IF 2.4 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2024-12-01 DOI: 10.1016/j.jglr.2024.102453

Shuyang Wang , Clare E. Robinson , John Spoelstra , Uwe Schneidewind , James W. Roy

High phosphorus (P) loads to the Laurentian Great Lakes contribute to eutrophication, harmful algal blooms, and hypoxia. Groundwater impacted by wastewater effluent from household septic systems, common in coastal communities, is a recognized P source to nearby lakes. However, the long-term impact of neighbourhood-scale septic system decommissioning (i.e., conversion to sewer connections) on this P loading is not well understood or quantified. The objective of this study was to investigate long-term P loading to Nottawasaga Bay from groundwater plumes of decommissioned septic systems in the coastal community of Wasaga Beach. Detailed groundwater sampling characterized a legacy P plume from a septic system decommissioned 35 years ago, revealing elevated soluble reactive phosphorus concentrations extending over 40 m and reaching the shoreline. Sorption and dispersion parameters required for neighbourhood-scale modeling were derived by simulating this persistent, long but thin P plume using a numerical model. Numerical simulations of P plumes from > 800 septic systems, 0.01–1.6 km from the shoreline and active < 65 years before decommissioning, revealed P mass discharge to the lake started after ∼ 30 years and will continue for > 4000 years. Relatedly, the extended P transport meant the annual mass discharge rate to the lake was consistently < 1.3 % of the annual mass input rate from septic systems to the aquifer, though it varied over time according to the septic systems’ distance from shore. These findings highlight the long-term view required in accounting for decommissioned septic systems in P management strategies to protect lake water quality.

{"title":"Phosphorus loading to nearshore waters from legacy septic system groundwater plumes in a Great Lakes coastal community","authors":"Shuyang Wang , Clare E. Robinson , John Spoelstra , Uwe Schneidewind , James W. Roy","doi":"10.1016/j.jglr.2024.102453","DOIUrl":"10.1016/j.jglr.2024.102453","url":null,"abstract":"<div><div>High phosphorus (P) loads to the Laurentian Great Lakes contribute to eutrophication, harmful algal blooms, and hypoxia. Groundwater impacted by wastewater effluent from household septic systems, common in coastal communities, is a recognized P source to nearby lakes. However, the long-term impact of neighbourhood-scale septic system decommissioning (i.e., conversion to sewer connections) on this P loading is not well understood or quantified. The objective of this study was to investigate long-term P loading to Nottawasaga Bay from groundwater plumes of decommissioned septic systems in the coastal community of Wasaga Beach. Detailed groundwater sampling characterized a legacy P plume from a septic system decommissioned 35 years ago, revealing elevated soluble reactive phosphorus concentrations extending over 40 m and reaching the shoreline. Sorption and dispersion parameters required for neighbourhood-scale modeling were derived by simulating this persistent, long but thin P plume using a numerical model. Numerical simulations of P plumes from > 800 septic systems, 0.01–1.6 km from the shoreline and active < 65 years before decommissioning, revealed P mass discharge to the lake started after ∼ 30 years and will continue for > 4000 years. Relatedly, the extended P transport meant the annual mass discharge rate to the lake was consistently < 1.3 % of the annual mass input rate from septic systems to the aquifer, though it varied over time according to the septic systems’ distance from shore. These findings highlight the long-term view required in accounting for decommissioned septic systems in P management strategies to protect lake water quality.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"50 6","pages":"Article 102453"},"PeriodicalIF":2.4,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142484","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

A new invasion of the St. Lawrence River estuary and Great Lakes ecosystems?

IF 2.4 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2024-12-01 DOI: 10.1016/j.jglr.2024.102438

John T. Lehman

In this issue, Roohi et al. (2024) describe wide-ranging food web alterations associated with the invasion of the Caspian Sea by the ctenophore Mnemiopsis leidyi. The study focuses on the southern, deepest basin of the Caspian within Iranian territorial waters but the ecosystem perturbations are broader. M. leidyi is perhaps the most-studied ctenophore species on the planet, native to the Atlantic coastal waters of North and South America but is now greatly expanding its range into the Baltic, North, Mediterranean, Black, and Caspian Seas. It is a voracious carnivore with an appetite for planktonic crustaceans, rotifers, bivalve larvae, and more. The authors suggest that it may next threaten the St. Lawrence River estuary or even the Great Lakes themselves.

引用次数: 0

Spatial comparison of two lake whitefish (Coregonus clupeaformis) spawning aggregations from the Bay of Quinte and eastern Lake Ontario

IF 2.4 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2024-12-01 DOI: 10.1016/j.jglr.2024.102443

Sarah J.H. Beech , Connor W. Elliott , Mark S. Ridgway , Erin Brown , Bruce L. Tufts

Lake whitefish (Coregonus clupeaformis) in the Laurentian Great Lakes have experienced major ecological changes and overexploitation throughout the past century. In Lake Ontario, the lake whitefish population was severely reduced and has shown minimal reproductive success since the 1990s. Two spawning aggregations have persisted within the Canadian side of the eastern basin, both of which continue to be targeted by commercial fisheries. The first group utilizes spawning habitat within the Bay of Quinte, while the other uses sections of shoreline on the south side of Prince Edward County in Lake Ontario. There is currently very little known regarding the seasonal distribution of these spawning aggregations, and whether or not they can be considered as isolated groups. Using acoustic telemetry, this study analyzed the spatial distribution and movement patterns of 23 lake whitefish in eastern Lake Ontario to determine whether the two spawning groups were spatially discrete. Spatial analysis revealed clear differences in space use between the spawning aggregations. Mixing of the spawning groups did not occur during the spawning season. Mixing was minimal at other times of the year and primarily occurred in the northwestern area of the eastern basin during August and September. Future research is needed to investigate factors that drive these behavioural differences, and the consequences for stock viability.

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引用次数: 0

Acute toxicity of lampricides to non-target species of concern in the Lake Champlain watershed

IF 2.4 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2024-12-01 DOI: 10.1016/j.jglr.2024.102422

Gary N. Neuderfer , Lance E. Durfey , Michael T. Calloway , Stephen J. Smith , Justin R. Schueller

Previous research evaluated the toxicity of the lampricide 4-nitro-3-(trifluoromethyl)phenol (TFM) and the combination of TFM with 1 % niclosamide (TFM:1%Nic) to multiple non-target species in the Laurentian Great Lakes. However, few toxicity studies have been conducted for species of concern in Lake Champlain (NY and VT). We conducted 12-hour flow-through toxicity tests with 4 species of native mussels, 6 species of fish, and 1 amphibian species. All tests included exposure of invasive larval Petromyzon marinus (sea lamprey) and were conducted with concentrations that bracketed the predicted minimum lethal concentration required to control larval sea lamprey. Mussel species’ NOEC, LOEC, LC₂₅, and LC₅₀ values ranged from 1.33 to 2.12, 1.71–2.66, 1.75–3.05, and 2.03–4.84 times field determined LC_99.9s for sea lamprey (×SL_LC99.9) in TFM-only toxicity tests, and from 1.36 to 1.70, 1.68–2.03, 1.86–2.10, and 2.35–2.68 × SL_LC99.9 for TFM:1%Nic toxicity tests, respectively. Fish species NOEC, LOEC, LC₂₅, and LC₅₀ values ranged from 0.60 to 1.89, 0.73–2.13, 0.72–2.11, and 0.76–2.18 × SL_LC99.9 in TFM-only toxicity tests, and from 0.64 to 2.48, 0.85–3.10, 0.74–3.05, and 0.78–3.16 × SL_LC99.9 for TFM:1%Nic toxicity tests, respectively. Amphibian species NOEC, LOEC, LC₂₅, and LC₅₀ values ranged from 0.74 to 0.75, 0.85–0.95, 0.83–0.87, and 0.85–0.91 × SL_LC99.9 in TFM-only toxicity tests, and from 0.63 to 0.65, 0.80–0.88, 0.77–0.82, and 0.78–0.87 × SL_LC99.9 for TFM:1%Nic toxicity tests, respectively. Generally, mussel species were tolerant, fish sensitivities were variable, and the amphibian species was sensitive to TFM and TFM:1%Nic.

{"title":"Acute toxicity of lampricides to non-target species of concern in the Lake Champlain watershed","authors":"Gary N. Neuderfer , Lance E. Durfey , Michael T. Calloway , Stephen J. Smith , Justin R. Schueller","doi":"10.1016/j.jglr.2024.102422","DOIUrl":"10.1016/j.jglr.2024.102422","url":null,"abstract":"<div><div>Previous research evaluated the toxicity of the lampricide 4-nitro-3-(trifluoromethyl)phenol (TFM) and the combination of TFM with 1 % niclosamide (TFM:1%Nic) to multiple non-target species in the Laurentian Great Lakes. However, few toxicity studies have been conducted for species of concern in Lake Champlain (NY and VT). We conducted 12-hour flow-through toxicity tests with 4 species of native mussels, 6 species of fish, and 1 amphibian species. All tests included exposure of invasive larval <em>Petromyzon marinus</em> (sea lamprey) and were conducted with concentrations that bracketed the predicted minimum lethal concentration required to control larval sea lamprey. Mussel species’ NOEC, LOEC, LC<sub>25</sub>, and LC<sub>50</sub> values ranged from 1.33 to 2.12, 1.71–2.66, 1.75–3.05, and 2.03–4.84 times field determined LC<sub>99.9</sub>s for sea lamprey (×SL<sub>LC99.9</sub>) in TFM-only toxicity tests, and from 1.36 to 1.70, 1.68–2.03, 1.86–2.10, and 2.35–2.68 × SL<sub>LC99.9</sub> for TFM:1%Nic toxicity tests, respectively. Fish species NOEC, LOEC, LC<sub>25</sub>, and LC<sub>50</sub> values ranged from 0.60 to 1.89, 0.73–2.13, 0.72–2.11, and 0.76–2.18 × SL<sub>LC99.9</sub> in TFM-only toxicity tests, and from 0.64 to 2.48, 0.85–3.10, 0.74–3.05, and 0.78–3.16 × SL<sub>LC99.9</sub> for TFM:1%Nic toxicity tests, respectively. Amphibian species NOEC, LOEC, LC<sub>25</sub>, and LC<sub>50</sub> values ranged from 0.74 to 0.75, 0.85–0.95, 0.83–0.87, and 0.85–0.91 × SL<sub>LC99.9</sub> in TFM-only toxicity tests, and from 0.63 to 0.65, 0.80–0.88, 0.77–0.82, and 0.78–0.87 × SL<sub>LC99.9</sub> for TFM:1%Nic toxicity tests, respectively. Generally, mussel species were tolerant, fish sensitivities were variable, and the amphibian species was sensitive to TFM and TFM:1%Nic.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"50 6","pages":"Article 102422"},"PeriodicalIF":2.4,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143143061","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

Going underground: Changing climate and flow seasonality may increase subsurface flow contribution and modify dissolved nutrient export from agricultural catchments

IF 2.4 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2024-12-01 DOI: 10.1016/j.jglr.2024.102452

Karl Hanke , N.K. Singh , N.B. Basu , A. Michaud , W. Yang , M.L. Macrae

Climate change is changing air temperature as well as the timing and magnitude of precipitation events, with increasing extreme events and winter flows; and changes are expected to increase in the next century. Such changes would likely alter streamflow and nutrient export, there is still uncertainty on the magnitude and timing of these shifts. Here, we used a modeling approach to explore this question in Ontario, Canada. We used an ensemble of general circulation models (GCMs) to force the Soil Water Assessment Tool (SWAT) to project runoff, suspended sediment, nitrate and total phosphorus losses under future climates within the Medway Creek watershed, a predominantly agricultural watershed that discharges into Lake St. Clair and eventually Lake Erie. Under the warmer air temperatures and greater magnitude and frequency of precipitation projected by the GCM ensemble, the model projected a significant increase in winter flows (23–36%), with most of the flow occurring through tile drains. Shifts in the seasonality of runoff and flow pathways are anticipated to contribute to an increase in concentration of dissolved solutes like nitrate (56–89%), and smaller increases in total phosphorus (25–47%) and suspended sediment concentrations (5–14%). Given increases in both flows and concentrations, nutrient loads increase in all scenarios, with the timing of greatest losses occurring earlier in the year. This work highlights the importance of understanding processes driving non-growing season nutrient export with climate change in tile-drained settings in cool agricultural regions and will assist managers in developing more effective watershed management plans for the long-term.

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引用次数: 0

Influence of barrier beach dynamics on ecological indicator taxa in north-central Lake Ontario coastal wetlands

IF 2.4 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2024-12-01 DOI: 10.1016/j.jglr.2024.102437

Grace N. Hoskin, Joshua R. Thienpont, Pham Ha Phuong Do, Kristen A. Coleman, Jennifer B. Korosi

Adaptive management of protected coastal wetlands requires an understanding of barrier dynamics over long timescales as well as feedbacks with ecosystem processes. In this study, we examined diatom (siliceous algae) and Cladocera (crustacean zooplankton) subfossil remains preserved in sediments as (paleo)ecological indicators of barrier beach dynamics in coastal wetlands along the north-central shore of Lake Ontario. Sediments integrate information across seasons and habitats, accounting for spatiotemporal variability in ecological indicator taxa that is often missed in contemporary sampling efforts. Subfossil remains also allow for reconstruction of historical changes before contemporary monitoring began. We found that small benthic Fragilariaceae diatom taxa were most abundant in high-closure barrier beach wetlands, and were uncommon in drowned river mouth wetlands, while Cladocera assemblages did not reflect coastal wetland hydrogeomorphology. A high-resolution paleoecological study of McLaughlin Bay, a high-closure barrier beach wetland, showed that the abundance of small benthic Fragilariaceae decreased, and diatom diversity increased, when the barrier was breached in 2005 and 1954. Recent increases in small benthic Fragilariaceae were consistent with assessments by the local conservation authority that McLaughlin Bay has become less connected to Lake Ontario in recent years, lending support to artificial barrier beach manipulation as a strategy to improve water quality. Barrier beach dynamics create a natural disturbance regime that is important for maintaining biodiversity and water quality in protected coastal wetlands. Our study provides an approach to monitor and investigate coupled physical-ecological dynamics of barrier beach coastal wetlands over decadal to centennial timescales.

{"title":"Influence of barrier beach dynamics on ecological indicator taxa in north-central Lake Ontario coastal wetlands","authors":"Grace N. Hoskin, Joshua R. Thienpont, Pham Ha Phuong Do, Kristen A. Coleman, Jennifer B. Korosi","doi":"10.1016/j.jglr.2024.102437","DOIUrl":"10.1016/j.jglr.2024.102437","url":null,"abstract":"<div><div>Adaptive management of protected coastal wetlands requires an understanding of barrier dynamics over long timescales as well as feedbacks with ecosystem processes. In this study, we examined diatom (siliceous algae) and Cladocera (crustacean zooplankton) subfossil remains preserved in sediments as (paleo)ecological indicators of barrier beach dynamics in coastal wetlands along the north-central shore of Lake Ontario. Sediments integrate information across seasons and habitats, accounting for spatiotemporal variability in ecological indicator taxa that is often missed in contemporary sampling efforts. Subfossil remains also allow for reconstruction of historical changes before contemporary monitoring began. We found that small benthic Fragilariaceae diatom taxa were most abundant in high-closure barrier beach wetlands, and were uncommon in drowned river mouth wetlands, while Cladocera assemblages did not reflect coastal wetland hydrogeomorphology. A high-resolution paleoecological study of McLaughlin Bay, a high-closure barrier beach wetland, showed that the abundance of small benthic Fragilariaceae decreased, and diatom diversity increased, when the barrier was breached in 2005 and 1954. Recent increases in small benthic Fragilariaceae were consistent with assessments by the local conservation authority that McLaughlin Bay has become less connected to Lake Ontario in recent years, lending support to artificial barrier beach manipulation as a strategy to improve water quality. Barrier beach dynamics create a natural disturbance regime that is important for maintaining biodiversity and water quality in protected coastal wetlands. Our study provides an approach to monitor and investigate coupled physical-ecological dynamics of barrier beach coastal wetlands over decadal to centennial timescales.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"50 6","pages":"Article 102437"},"PeriodicalIF":2.4,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142485","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

Comparing three common nest survey methods, using double-crested cormorants as a proposed sentinel for monitoring plastic pollution in freshwater environments

IF 2.4 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2024-12-01 DOI: 10.1016/j.jglr.2024.102448

Kerry Schutten , André Morrill , Akshaya Chandrashekar , D.V. Chip Weseloh , E. Jane Parmley , Brian Stevens , Claire Jardine , Jennifer F. Provencher

Many bird species use plastic as nest-building material, and nest surveys represent a unique opportunity to monitor environmental plastic pollution. However, the current literature lacks consistent, repeatable methodologies, making comparison across studies challenging. This study evaluated three common nest survey methods to assess the use of nest debris: photographic assessment, visual assessment, and nest deconstruction. We applied these methods to double-crested cormorant nests (Nannopterum auritum) at two locations on Lake Ontario, Canada. We found that for this species, nest deconstruction yielded the greatest accuracy and detail for detecting debris abundance, type, and colour. Of the two non-invasive methods, visual surveys outperformed photographic surveys across all metrics assessed. In our mainland colony, 100% of nests contained debris based on visual assessment, while at our offshore colony only 37.4% of nests contained debris, suggesting that location influences nest debris for this species. We detected Personal Protective Equipment (PPE)-related debris in 20% of all nests across survey years at our mainland colony (2022 and 2023), representing the first time that PPE has been documented in the nests of this species and demonstrating that nest surveys can be a useful tool for capturing changes in an evolving pollution landscape. This study contributes evidence that double-crested cormorants may be a useful sentinel species for monitoring plastic pollution in understudied, freshwater environments. Our results also demonstrate that the chosen method can greatly impact the results of a nest survey, and careful consideration of methodology should be undertaken before implementing a nest survey to monitor plastic pollution.

{"title":"Comparing three common nest survey methods, using double-crested cormorants as a proposed sentinel for monitoring plastic pollution in freshwater environments","authors":"Kerry Schutten , André Morrill , Akshaya Chandrashekar , D.V. Chip Weseloh , E. Jane Parmley , Brian Stevens , Claire Jardine , Jennifer F. Provencher","doi":"10.1016/j.jglr.2024.102448","DOIUrl":"10.1016/j.jglr.2024.102448","url":null,"abstract":"<div><div>Many bird species use plastic as nest-building material, and nest surveys represent a unique opportunity to monitor environmental plastic pollution. However, the current literature lacks consistent, repeatable methodologies, making comparison across studies challenging. This study evaluated three common nest survey methods to assess the use of nest debris: photographic assessment, visual assessment, and nest deconstruction. We applied these methods to double-crested cormorant nests (<em>Nannopterum auritum</em>) at two locations on Lake Ontario, Canada. We found that for this species, nest deconstruction yielded the greatest accuracy and detail for detecting debris abundance, type, and colour. Of the two non-invasive methods, visual surveys outperformed photographic surveys across all metrics assessed. In our mainland colony, 100% of nests contained debris based on visual assessment, while at our offshore colony only 37.4% of nests contained debris, suggesting that location influences nest debris for this species. We detected Personal Protective Equipment (PPE)-related debris in 20% of all nests across survey years at our mainland colony (2022 and 2023), representing the first time that PPE has been documented in the nests of this species and demonstrating that nest surveys can be a useful tool for capturing changes in an evolving pollution landscape. This study contributes evidence that double-crested cormorants may be a useful sentinel species for monitoring plastic pollution in understudied, freshwater environments. Our results also demonstrate that the chosen method can greatly impact the results of a nest survey, and careful consideration of methodology should be undertaken before implementing a nest survey to monitor plastic pollution.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"50 6","pages":"Article 102448"},"PeriodicalIF":2.4,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142480","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

Investigating nearshore spatial and temporal trends in nutrient concentrations along an urban northern shoreline, Lake Ontario

IF 2.4 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2024-12-01 DOI: 10.1016/j.jglr.2024.102419

Tyler J. Harrow-Lyle , David C. Depew , Andrew J. Bramburger , Reza Valipour , Krista M. Chomicki

The nearshore zone of the Laurentian Great Lakes is of significant ecological importance, providing critical biogeochemical processes supporting spatially diverse habitats for a variety of species. Extreme plant and algal growth are common due to excessive anthropogenic eutrophication, with exacerbations from dreissenid establishment and lake mixing (e.g., coastal upwelling events and nearshore-offshore water exchanges), resulting in nuisance algal blooms across the nearshore area adjacent to Western Durham, Ontario, Canada. Thus, our main goal was to characterize the trends in essential nutrients (i.e., phosphorus and nitrogen) within the nearshore by applying general additive models on irregular time-series from 2011 to 2022 and to identify plausible contributing factors using exploratory principal component analysis. Increasing trends for total phosphorus were observed in surface (0.5 m below the surface) and benthic (0.5 m above the bottom) waters despite decreases in point source loading to the area. Most notably, the local water pollution control plant (WPCP) outfall did not seem to drive lake phosphorus concentrations across the study area, depicted by an orthogonal relationship within the principal component analysis. While the WPCP is a point source to the nearshore, it does not appear to be the primary driver of temporal lake phosphorus trends. Our results suggest that weather, inertial forcings and lake hydrodynamics in combination with traditional point-sources across Western Durham are contributing to the increasing total phosphorus trends observed as the peak period of wave spectra, wave height, alongshore wind speeds, watershed loadings, and total phosphorus concentrations within Lake Ontario were positively associated.

{"title":"Investigating nearshore spatial and temporal trends in nutrient concentrations along an urban northern shoreline, Lake Ontario","authors":"Tyler J. Harrow-Lyle , David C. Depew , Andrew J. Bramburger , Reza Valipour , Krista M. Chomicki","doi":"10.1016/j.jglr.2024.102419","DOIUrl":"10.1016/j.jglr.2024.102419","url":null,"abstract":"<div><div>The nearshore zone of the Laurentian Great Lakes is of significant ecological importance, providing critical biogeochemical processes supporting spatially diverse habitats for a variety of species. Extreme plant and algal growth are common due to excessive anthropogenic eutrophication, with exacerbations from dreissenid establishment and lake mixing (e.g., coastal upwelling events and nearshore-offshore water exchanges), resulting in nuisance algal blooms across the nearshore area adjacent to Western Durham, Ontario, Canada. Thus, our main goal was to characterize the trends in essential nutrients (i.e., phosphorus and nitrogen) within the nearshore by applying general additive models on irregular time-series from 2011 to 2022 and to identify plausible contributing factors using exploratory principal component analysis. Increasing trends for total phosphorus were observed in surface (0.5 m below the surface) and benthic (0.5 m above the bottom) waters despite decreases in point source loading to the area. Most notably, the local water pollution control plant (WPCP) outfall did not seem to drive lake phosphorus concentrations across the study area, depicted by an orthogonal relationship within the principal component analysis. While the WPCP is a point source to the nearshore, it does not appear to be the primary driver of temporal lake phosphorus trends. Our results suggest that weather, inertial forcings and lake hydrodynamics in combination with traditional point-sources across Western Durham are contributing to the increasing total phosphorus trends observed as the peak period of wave spectra, wave height, alongshore wind speeds, watershed loadings, and total phosphorus concentrations within Lake Ontario were positively associated.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"50 6","pages":"Article 102419"},"PeriodicalIF":2.4,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142481","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

Are lakemounts hotspots of productivity and biodiversity?

IF 2.4 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2024-12-01 DOI: 10.1016/j.jglr.2024.102440

Bianca Possamai , J. Ellen Marsden , John Janssen , Michael D. Rennie , Thomas R. Hrabik , Jason D. Stockwell

Oceanic seamounts are hotspots of biodiversity, productivity, and other ecosystem processes. Different hydrodynamic processes leading to physical-biological coupling dynamics occur in these systems making them oases in the open ocean. Due to their disproportional effects on ecosystem function (e.g., high biogeochemical rates), seamounts can also be considered ecosystem control points. On a smaller scale, abrupt offshore reefs in large lake ecosystems (i.e., “lakemounts”) may serve similar roles as seamounts by parallel mechanisms. However, very little is known about lakemounts or the physical-biological coupling that could make these isolated habitats an important source of energy production and biodiversity for offshore, open-water regions of large lakes. We hypothesize that lakemount-induced upwellings serve a similarly important process in lakes as seamounts in the ocean, boosting productivity and biodiversity in offshore areas of large lakes. Identification of these biodiversity hotspots and ecosystem control points, and the mechanisms driving their processes, is vital for understanding how climate change may alter physical-biological coupling and resultant community- and ecosystem-level processes. Such linkages may play a key role for effective and cost-efficient environmental conservation and the maintenance of ecosystem function and services in large lake ecosystems in the face of global change.

{"title":"Are lakemounts hotspots of productivity and biodiversity?","authors":"Bianca Possamai , J. Ellen Marsden , John Janssen , Michael D. Rennie , Thomas R. Hrabik , Jason D. Stockwell","doi":"10.1016/j.jglr.2024.102440","DOIUrl":"10.1016/j.jglr.2024.102440","url":null,"abstract":"<div><div>Oceanic seamounts are hotspots of biodiversity, productivity, and other ecosystem processes. Different hydrodynamic processes leading to physical-biological coupling dynamics occur in these systems making them oases in the open ocean. Due to their disproportional effects on ecosystem function (e.g., high biogeochemical rates), seamounts can also be considered ecosystem control points. On a smaller scale, abrupt offshore reefs in large lake ecosystems (i.e., “lakemounts”) may serve similar roles as seamounts by parallel mechanisms. However, very little is known about lakemounts or the physical-biological coupling that could make these isolated habitats an important source of energy production and biodiversity for offshore, open-water regions of large lakes. We hypothesize that lakemount-induced upwellings serve a similarly important process in lakes as seamounts in the ocean, boosting productivity and biodiversity in offshore areas of large lakes. Identification of these biodiversity hotspots and ecosystem control points, and the mechanisms driving their processes, is vital for understanding how climate change may alter physical-biological coupling and resultant community- and ecosystem-level processes. Such linkages may play a key role for effective and cost-efficient environmental conservation and the maintenance of ecosystem function and services in large lake ecosystems in the face of global change.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"50 6","pages":"Article 102440"},"PeriodicalIF":2.4,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143143105","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