{"query_echo":{"q":"","filters":{"analysis_type":["nutrient analysis"]},"warnings":[{"code":"facet_value_not_in_vocabulary","message":"Value 'nutrient analysis' for facet 'analysis_type' is not in the controlled vocabulary."}]},"total":{"value":3,"relation":"eq"},"page":1,"page_size":20,"self":"https://climateinsightsdirectory.org/api/v1/search?analysis_type=nutrient+analysis","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-000140","url":"https://climateinsightsdirectory.org/document/iisd-000140","title":"Advancing Netley-Libau Marsh Restoration Efforts: Cattail biomass and nutrient survey of Netley-Libau Marsh","publisher":{"name":"International Institute for Sustainable Development","organization":"international-institute-for-sustainable-development"},"document_type":"report","language":"en","date_published":"2015-04-27","source_url":"https://www.iisd.org/publications/report/advancing-netley-libau-marsh-restoration-efforts-cattail-biomass-and-nutrient","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"The report examines the role of Netley-Libau Marsh in mitigating phosphorus overloading in Lake Winnipeg. It finds that total phosphorus concentrations in the marsh significantly exceed Manitoba Water Quality Guidelines. The study estimates current phosphorus and nitrogen storage in plants and sediment, suggesting that a 25 per cent restoration of cattail and other marsh plants could increase storage potential by 130 tonnes of phosphorus and 500 tonnes of nitrogen.","ai_generated":true,"unit":"iisd-000140#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"Phosphorus overloading in Lake Winnipeg has led to more frequent algal blooms, with the Red River contributing nearly 60 per cent of the phosphorus entering the lake.","ai_generated":true,"unit":"iisd-000140#insight-1","date_modified":"2026-10-23"},{"text":"Netley-Libau Marsh is currently degraded due to dredging, drainage, and water management, resulting in the loss of plant communities and wildlife habitat.","ai_generated":true,"unit":"iisd-000140#insight-2","date_modified":"2026-10-23"},{"text":"Average total phosphorus (TP) concentrations in Netley-Libau Marsh measured between 0.39 and 3.53 mg/L in August 2009, which is significantly higher than the Manitoba Water Quality Guidelines limit of 0.025 mg/L.","ai_generated":true,"unit":"iisd-000140#insight-3","date_modified":"2026-10-23"},{"text":"Current estimates for total stored phosphorus and nitrogen are 525 tonnes and 1,965 tonnes in plants (including roots and litter), and 230 and 305 tonnes in sediment.","ai_generated":true,"unit":"iisd-000140#insight-4","date_modified":"2026-10-23"},{"text":"Increasing the restoration of cattail and other marsh plants by 25 per cent could raise the marsh's phosphorus and nitrogen storage potential by 130 and 500 tonnes, respectively.","ai_generated":true,"unit":"iisd-000140#insight-5","date_modified":"2026-10-23"}],"climate_tags":["water quality","ecosystem service"],"geography_discussed":["Red River of the North","Manitoba","Nelson-Churchill River Basin","Canada"],"frame_perspective":[],"analysis_type":["environmental survey","nutrient analysis"]},{"id":"iisd-001161","url":"https://climateinsightsdirectory.org/document/iisd-001161","title":"Cattail Biomass to Energy","publisher":{"name":"International Institute for Sustainable Development","organization":"international-institute-for-sustainable-development"},"document_type":"report","language":"en","date_published":"2013-03","source_url":"https://www.iisd.org/system/files/publications/cattail-biomass-to-energy-commercial-scale-harvesting-solid-fuel.pdf","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"The report details pilot-scale trials in Manitoba using commercial agricultural equipment to harvest cattails from highway ditches and wetlands. It finds that while commercial equipment can be used, success is highly dependent on soil moisture and timing. The trials demonstrated that cattails can effectively capture phosphorus, though late-season harvesting reduces the amount of nutrient recovery. Economic analysis indicates that harvesting costs vary by site, with wetland harvesting generally being more productive but posing higher risks of equipment damage and sinking.","ai_generated":true,"unit":"iisd-001161#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"Wetland areas are more productive for biomass yield than highway ditches; at Pelly’s Lake, the harvested yield per hectare was approximately double that of the Highway 1 site.","ai_generated":true,"unit":"iisd-001161#insight-1","date_modified":"2026-10-23"},{"text":"Harvesting cattails removes phosphorus (P) from the environment, preventing it from being released back into the water during decomposition. In the Pelly’s Lake trial, 191 kg of P was collected from 54.1 hectares, though potential capture is higher if harvested earlier in the season.","ai_generated":true,"unit":"iisd-001161#insight-2","date_modified":"2026-10-23"},{"text":"Soil moisture and precipitation are critical factors for harvesting success; below-normal precipitation in 2012 facilitated equipment entry, while above-normal precipitation in October and November hampered baling operations.","ai_generated":true,"unit":"iisd-001161#insight-3","date_modified":"2026-10-23"}],"climate_tags":["biomass","bioenergy","carbon sequestration"],"geography_discussed":["Saskatchewan","Pelly’s Lake","Portage la Prairie","Elie"],"frame_perspective":[],"analysis_type":["pilot study","economic analysis","nutrient analysis"]},{"id":"iisd-002491","url":"https://climateinsightsdirectory.org/document/iisd-002491","title":"Cattail biomass and nutrient survey of Netley-Libau Marsh","publisher":{"name":"International Institute for Sustainable Development","organization":"international-institute-for-sustainable-development"},"document_type":"report","language":"en","date_published":"2012-04","source_url":"https://www.iisd.org/system/files/publications/advancing-netley-libau-marsh-restoration-efforts.pdf","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"The study finds that Netley-Libau Marsh is currently degraded and not functioning as a healthy coastal wetland, with total phosphorus levels in the water significantly exceeding Manitoba Water Quality Guidelines. However, the marsh's cattail communities store substantial amounts of nutrients—estimated at 525 tonnes of phosphorus and 1,965 tonnes of nitrogen—and the report argues that restoring 25% of lost plant communities could further increase these storage capacities by 130 and 500 tonnes, respectively.","ai_generated":true,"unit":"iisd-002491#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"Netley-Libau Marsh has suffered significant ecological degradation over several decades due to dredging, drainage, and water management, leading to a decline in wildlife habitat and a loss of plant communities. Between 1979 and 2001, open water areas increased from 8,880 hectares (35%) to 13,125 hectares (51%), while vegetation cover declined by nearly 32%.","ai_generated":true,"unit":"iisd-002491#insight-1","date_modified":"2026-10-23"},{"text":"Water quality samples from August 2009 show that total phosphorus (TP) concentrations in the marsh range from 0.39 to 3.53 mg/L (with one site reaching 9.56 mg/L), which is significantly higher than the Manitoba Water Quality Guideline limit of 0.025 mg/L.","ai_generated":true,"unit":"iisd-002491#insight-2","date_modified":"2026-10-23"},{"text":"The cattail (Typha spp.) community in the marsh is estimated to store 525 tonnes of total phosphorus and 1,965 tonnes of total nitrogen. Additionally, the soil layer is estimated to contain 230 tonnes of phosphorus and 305 tonnes of nitrogen.","ai_generated":true,"unit":"iisd-002491#insight-3","date_modified":"2026-10-23"},{"text":"Restoring 25% of the lost plant communities and organic litter layers in Netley-Libau Marsh could increase the storage potential for phosphorus by 130 tonnes and nitrogen by 500 tonnes.","ai_generated":true,"unit":"iisd-002491#insight-4","date_modified":"2026-10-23"},{"text":"The average dry biomass yield for cattails in the marsh is estimated at 18,870 kg (18.9 tonnes) per hectare, with an average plant density of 43 plants per square metre and an average height between 260 and 290 centimetres.","ai_generated":true,"unit":"iisd-002491#insight-5","date_modified":"2026-10-23"},{"text":"Nutrient distribution within the cattail community shows that the greatest proportion of nitrogen is found in above-ground plant material, whereas the largest phosphorus reserves are located in the below-ground roots and the soil layer.","ai_generated":true,"unit":"iisd-002491#insight-6","date_modified":"2026-10-23"},{"text":"The Red River is the primary source of nutrient stress for Lake Winnipeg, contributing nearly 60% of the phosphorus entering the lake, with 14% originating from agriculture and 11% from wastewater effluent in Manitoba.","ai_generated":true,"unit":"iisd-002491#insight-7","date_modified":"2026-10-23"},{"text":"Harvesting nutrient-rich aboveground cattail biomass can permanently remove stored phosphorus from the aquatic system, providing a feedstock for bioenergy and biomaterials while reducing nutrient loading to the watershed.","ai_generated":true,"unit":"iisd-002491#insight-8","date_modified":"2026-10-23"}],"climate_tags":["biomass","bioenergy","water quality","carbon sequestration"],"geography_discussed":["Manitoba","Canada","United States"],"frame_perspective":[],"analysis_type":["field survey","nutrient analysis","biomass estimation"]}]}