{"query_echo":{"q":"","filters":{"geography":["Pelican Lake"]},"warnings":[{"code":"facet_value_not_in_vocabulary","message":"Value 'Pelican Lake' for facet 'geography' is not in the controlled vocabulary."}]},"total":{"value":2,"relation":"eq"},"page":1,"page_size":20,"self":"https://climateinsightsdirectory.org/api/v1/search?geography=Pelican+Lake","stability":"beta","ai_marking":{"digital_source_type":{"uri":"http://cv.iptc.org/newscodes/digitalsourcetype/trainedAlgorithmicMedia","name":"Created using Generative AI"},"notice":"Summary and key insights are generated using artificial intelligence."},"results":[{"id":"iisd-002909","url":"https://climateinsightsdirectory.org/document/iisd-002909","title":"Floating Treatment Wetlands and Plant Bioremediation: Nutrient treatment in eutrophic freshwater lakes","publisher":{"name":"International Institute for Sustainable Development","organization":"international-institute-for-sustainable-development"},"document_type":"case study","language":"en","date_published":"2019-10","source_url":"https://www.iisd.org/system/files/publications/floating-treatment-wetlands.pdf","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"The report evaluates floating treatment wetlands (FTWs) as a nature-based solution for eutrophication in shallow lakes. Through primary research at the IISD-Experimental Lakes Area (IISD-ELA) and a case study of Pelican Lake, Manitoba, the study demonstrates that FTWs—particularly those using cattails—effectively sequester phosphorus and nitrogen. While plant biomass contributes to nutrient removal, the report emphasizes that the microbial biofilm on roots provides up to 80% of the total treatment. For Pelican Lake, the study estimates that 5% surface coverage could reduce total phosphorus levels by 10% to 50%, though FTWs must be combined with watershed-level strategies to meet provincial water quality standards.","ai_generated":true,"unit":"iisd-002909#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"Floating treatment wetlands (FTWs) serve as a viable 'natural infrastructure' alternative to conventional in-lake remediation for smaller eutrophic water bodies, offering additional benefits such as shoreline protection from wave erosion and wildlife habitat enhancement.","ai_generated":true,"unit":"iisd-002909#insight-1","date_modified":"2026-10-23"},{"text":"Research at the IISD-ELA showed that cattails are opportunistic nutrient consumers; a relatively small increase in phosphorus loading led to rapid increases in plant productivity, biomass production, and phosphorus uptake.","ai_generated":true,"unit":"iisd-002909#insight-2","date_modified":"2026-10-23"},{"text":"The majority of nutrient removal in FTW systems is performed by the microbial biofilm coating the roots and island surface, rather than the plants themselves, with biofilm accounting for up to 80% of the treatment.","ai_generated":true,"unit":"iisd-002909#insight-3","date_modified":"2026-10-23"},{"text":"In cattails, the roots are the primary site of phosphorus sequestration, containing significantly higher concentrations of phosphorus than aboveground shoots.","ai_generated":true,"unit":"iisd-002909#insight-4","date_modified":"2026-10-23"},{"text":"For Pelican Lake, Manitoba, it is estimated that covering 5% of the lake's surface with FTWs could reduce total phosphorus (TP) levels by 10% to 50%, depending on the system's removal efficiency.","ai_generated":true,"unit":"iisd-002909#insight-5","date_modified":"2026-10-23"},{"text":"FTWs alone are insufficient to bring Pelican Lake's total phosphorus concentrations below the Manitoba provincial guideline of 0.025 mg/L, as the lake's 2016 mean TP was 0.305 mg/L.","ai_generated":true,"unit":"iisd-002909#insight-6","date_modified":"2026-10-23"},{"text":"To maximize nutrient removal, the report suggests harvesting aboveground plant biomass in August or September to prevent the reintroduction of nutrients into the water column during senescence and winter freeze-thaw cycles.","ai_generated":true,"unit":"iisd-002909#insight-7","date_modified":"2026-10-23"},{"text":"The most effective remediation strategy for eutrophic lakes involves combining in-lake treatments like FTWs with watershed-level nutrient reduction strategies that target both internal and external loading sources.","ai_generated":true,"unit":"iisd-002909#insight-8","date_modified":"2026-10-23"}],"climate_tags":["nature-based solutions","water quality","circular economy"],"geography_discussed":["Ontario","Winnipeg","Florida","People's Republic of China","Montana","New Jersey","United States"],"frame_perspective":[],"analysis_type":["case study","experimental research","literature review","quantitative modeling"]},{"id":"iisd-003229","url":"https://climateinsightsdirectory.org/document/iisd-003229","title":"Manitoba Prairie Lakes: Mass balance budget for nutrient management at Pelican Lake, Manitoba","publisher":{"name":"International Institute for Sustainable Development","organization":"international-institute-for-sustainable-development"},"document_type":"report","language":"en","date_published":"2017-10","source_url":"https://www.iisd.org/system/files/publications/manitoba-prairie-lakes-mass-pelican-lake.pdf","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"The study establishes a nutrient mass balance for Pelican Lake, Manitoba, finding that the lake acts as a net sink for phosphorus and a net source of nitrogen. External nutrient loads are strongly linked to surface hydrology and agricultural land use, with internal recycling from sediments contributing significantly to phosphorus levels. The findings suggest that remediation should focus on high-agricultural sub-catchments and the regulation of the Pembina River inlet dam.","ai_generated":true,"unit":"iisd-003229#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"Pelican Lake is a net sink for phosphorus, retaining approximately 70 per cent of external inputs, with the majority of this accumulation occurring in the water column.","ai_generated":true,"unit":"iisd-003229#insight-1","date_modified":"2026-10-23"},{"text":"The lake acts as a net source of nitrogen to the surrounding environment, including groundwater, largely due to biological processes such as N2 fixation driven by high phosphorus concentrations.","ai_generated":true,"unit":"iisd-003229#insight-2","date_modified":"2026-10-23"},{"text":"Internal phosphorus recycling from lake sediments and macrophytes contributed approximately 10 per cent of external phosphorus loads, with sediments acting as a net source of P to the water column during the study period.","ai_generated":true,"unit":"iisd-003229#insight-3","date_modified":"2026-10-23"},{"text":"External nutrient fluxes are strongly tied to surface hydrology, indicating that climate variability and increased rainfall have significantly contributed to nutrient inputs in recent years.","ai_generated":true,"unit":"iisd-003229#insight-4","date_modified":"2026-10-23"},{"text":"Nutrient loading is not primarily determined by catchment size but by land use; the highest nutrient loads originate from the sub-catchment with the highest percentage of agricultural area (PL05), rather than the largest catchment by area.","ai_generated":true,"unit":"iisd-003229#insight-5","date_modified":"2026-10-23"},{"text":"A significant portion of phosphorus loading occurs during spring runoff events, specifically when the PL08A-inlet dam is opened to divert water from the Pembina River; approximately 45 per cent of the phosphorus load during the study period was delivered during the March dam opening.","ai_generated":true,"unit":"iisd-003229#insight-6","date_modified":"2026-10-23"},{"text":"Groundwater serves as a major output for nitrogen, with 103,007 kg of total nitrogen moving from the lake to aquifers, accounting for 93 per cent of the total outflow nitrogen load.","ai_generated":true,"unit":"iisd-003229#insight-7","date_modified":"2026-10-23"}],"climate_tags":["climate variability","water quality"],"geography_discussed":["Pembina River","Lake Winnipeg basin"],"frame_perspective":[],"analysis_type":["mass balance budget","hydrological modelling","water quality assessment"]}]}