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Open research questions in Aquatic Ecosystems and Phytoplankton Dynamics

164 unresolved questions extracted from the limitations and future-work sections of 1,310 Aquatic Ecosystems and Phytoplankton Dynamics papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • Invasive alien plant species have a strong capacity to displace and reduce native plant populations. The management of invasive alien plant species is challenging due to their extensive seed banks and/or high dispersal ability. The current management strategies for invasive alien plant species are insufficient, and there is a need for more effective management strategies.

    Invasive Alien Plant Species in Black Sea Delta Protected Areas: Patterns, Impacts, and Management Recommendations · 2026 · DOI

  • There is a need to understand the patterns, impacts, and management recommendations for invasive alien plant species in Black Sea delta protected areas. The current management of invasive alien plant species is insufficient, and there is a need for more effective management strategies.

    Invasive Alien Plant Species in Black Sea Delta Protected Areas: Patterns, Impacts, and Management Recommendations · 2026 · DOI

  • Limited understanding of the remediation potential of different floating macrophytes. Need for effective ecological management tools for restoring phytoplankton community structure. Gap in knowledge on the removal efficiencies of nitrogen and phosphorus using ecological floating beds.

    Comparative assessment of phytoremediation using Eichhornia crassipes, Pistia stratiotes, and Ipomoea aquatica floating beds for phytoplankton community restoration and microcystin-LR removal in eutrophic pond water · 2026 · DOI

  • The diversity of free-living Copepoda in Iraq has remained poorly documented. There is a lack of comprehensive checklists of copepods in Iraq. The study highlights the need for further research on the diversity and distribution of copepods in Iraq.

    An annotated checklist of free-living Copepoda (Crustacea) of Iraq: diversity, distribution, and biogeographical affinities · 2026 · DOI

  • Further studies are needed to establish a chronic no-effect threshold for the composite, - Research is needed to measure Cu2+ penetration and polymer distribution within colonies, - Studies should investigate the effects of the composite on non-target primary producers in different ecosystems

    Field-Scale Suppression of Cyanobacterial Blooms by Cationic Polymer-Modified Local Soil: Selective Inactivation Mechanism and Ecological Responses · 2026 · DOI

  • Current methods for controlling cyanobacterial blooms have limitations, including non-target exposure and increased microcystin concentrations. There is a need for effective interventions that can reduce bloom biomass while limiting secondary ecological and toxicological effects.

    Field-Scale Suppression of Cyanobacterial Blooms by Cationic Polymer-Modified Local Soil: Selective Inactivation Mechanism and Ecological Responses · 2026 · DOI

  • The study identifies the challenge of understanding the complex interactions between macrophyte species and their environment. The study highlights the need to develop effective methods for extracting nutrients and heavy metals from water using macrophytes. The study identifies the challenge of evaluating the use of macrophytes' biomass as natural fertilizers.

    Exploratory Analysis on the Chemical Composition of Aquatic Macrophytes in a Water Reservoir—Rio de Janeiro, Brazil · 2025 · DOI

  • The study identifies a gap in the understanding of the chemical composition of aquatic macrophytes. The study highlights the need to research the role of macrophyte species in aquatic life.

    Exploratory Analysis on the Chemical Composition of Aquatic Macrophytes in a Water Reservoir—Rio de Janeiro, Brazil · 2025 · DOI

  • Conducting carefully designed experiments at different scales to further validate improvements to existing eutrophication mitigation models. Investigating the role of internal nutrient cycling in lake ecosystems. Studying the effects of N and P contents in sediment deposits on lake eutrophication.

    Internal Cycling Influences Nutrient Changes Leading to Altered Nutrient Limitation in Eutrophic Lake · 2025 · DOI

  • Further investigation of the reliability of Chl-a to characterize phytoplankton density, - Study of the effects of nutrient concentration on Chl-a concentration, - Comparison of different methods for measuring Chl-a

    Comparative Study on the Determination of Chlorophyll-a in Lake Phytoplankton by a YSI Multi-Parameter Water Quality Meter and Laboratory Spectrophotometric Method · 2024 · DOI

  • The study acknowledges the challenge of low DNA concentration in the samples, which required the use of a SpeedVac to concentrate the gDNA. The study recognizes the limitation of metagenomic methods in predicting functional changes, which may not necessarily indicate expression or adaptation. The study highlights the need for additional biological replicates and long-term investigations to validate the findings.

    Short-Term Warming Induces Cyanobacterial Blooms and Antibiotic Resistance in Freshwater Lake, as Revealed by Metagenomics Analysis · 2024 · DOI

  • Long-term investigations across multiple freshwater bodies are needed, - Additional biological replicates in future studies could strengthen the results, - Incorporating metatranscriptomics, metaproteomics, and metabolomics could validate the predicted functional changes, - Techniques like qPCR, ELISA, or Western blotting could offer more direct gene or protein quantification

    Short-Term Warming Induces Cyanobacterial Blooms and Antibiotic Resistance in Freshwater Lake, as Revealed by Metagenomics Analysis · 2024 · DOI

  • Harpacticoida remain markedly underrepresented, - Substantial undersampling of benthic and meiofaunal habitats

    An annotated checklist of free-living Copepoda (Crustacea) of Iraq: diversity, distribution, and biogeographical affinities · 2026 · DOI

  • Mediterranean ponds are small but valuable habitats, yet the relationships between environmental heterogeneity and vegetation remain poorly explored.

    Exploring habitat complexity in Mediterranean ponds: physicochemical heterogeneity and macrophyte community variation in inland Sicily · 2026 · DOI

  • Macrophytes are widely used as biological quality elements in ecological assessment, yet the extent to which they reflect water-body typology remains insufficiently evaluated in Serbia.

    Macrophyte community structure across Serbian water-body types: foundations for developing bioassessment tools · 2026 · DOI

  • However, observed increases in algal biomass do not consistently correlate with air temperature or precipitation, and evidence is lacking for a causal effect of climate or the nonlinear dynamics needed to demonstrate regime shifts.

    Abrupt changes in algal biomass of thousands of US lakes are related to climate and are more likely in low-disturbance watersheds · 2025 · DOI

  • BACKGROUND: Although the acute toxicity of microcystin-LR has been widely confirmed, its effects on aquatic organisms at environmental concentrations have not been systematically studied.

    Effects of different doses of microcystin-LR exposure on gut development and the microbiota of Xenopus laevis tadpoles · 2025 · DOI

  • Of emerging interest is the poorly understood interplay between viruses and toxic species that form blooms.

    Virus Infection of a Freshwater Cyanobacterium Contributes Significantly to the Release of Toxins Through Cell Lysis · 2025 · DOI

  • Despite the global ecological and societal importance of deep lakes and their associated biota and ecosystem services, the relationships between water and sediment features and the spatial patterns of macrophyte assemblages remain poorly understood in these ecosystems, especially below 4–5 m depth.

    Spatial relationships between macrophyte assemblages, water and sediment features in deep lakes · 2025 · DOI

  • The extent of the differences between atmospheric and lake heatwaves remains unclear.

    Lakes are experiencing more severe heatwaves than the atmosphere · 2025 · DOI

  • Yet, the combined impact of propagule pressure, herbivory, and nutrient enrichment on the competitive dynamics between invasive alien macrophytes and native macrophyte communities is not well understood due to a paucity of studies.

    Nutrient enrichment, propagule pressure, and herbivory interactively influence the competitive ability of an invasive alien macrophyte Myriophyllum aquaticum · 2024 · DOI

  • Along with widely reported microcystins, cyanobacteria coproduce other bioactive metabolites; however, information about their dynamics in surface waters is sparse.

    Tracking Extensive Portfolio of Cyanotoxins in Five-Year Lake Survey and Identifying Indicator Metabolites of Cyanobacterial Taxa · 2024 · DOI

  • 8 , 9 , 10 , 11 , 12 However, changing habitat availability has not been assessed due to a lack of in situ water quality and hydrology data and the irregular monitoring of these waterbodies.

    Productivity declines threaten East African soda lakes and the iconic Lesser Flamingo · 2024 · DOI

  • Although extensive research has been conducted on lake heatwaves, little is known about cold‐water extremes, referred to as lake cold spells.

    Lake Cold Spells Are Declining Worldwide · 2024 · DOI

  • Complex interspecific competition may strengthen or weaken algae inhibition, but the response of this inhibition to complex biological mechanisms needs to be further explored.

    Meta-analysis to identify inhibition mechanisms for the effects of submerged plants on algae · 2024 · DOI

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164 open questions have been extracted from the limitations and future-work passages of 1,310 Aquatic Ecosystems and Phytoplankton Dynamics papers in our 4.5M-paper local library. Each one below links back to the study that raised it, so you can read the original claim in context.

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