ArticleCommunications earth & environment2021
Perceived global increase in algal blooms is attributable to intensified monitoring and emerging bloom impacts.
Article in Communications earth & environment, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 76 papers, 2 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
76 citing papers in PubMed, 2 syntheses or guidelines pooled it, 474 citations in OpenAlex.
- Pooled it
- Fear of grazing rivals the toxin-inducing effects of nutrients in two marine harmful algae - a meta-analysis.Biological reviews of the Cambridge Philosophical Society · 2026Pooled it
- Microfluidic-Integrated CRISPR-Cas Biosensor for Marine Pollutant and Pathogen Monitoring: A Review.Biosensors · 2026Review
- A catastrophic marine mortality event caused by a complex algal bloom including the brevetoxin producer Karenia cristata.Nature ecology & evolution · 2026Article
- Interannual variation in freshwater and marine phycotoxins quantified from oysters cultured across diverse coastal sites.Aquaculture reports · 2026Article
- Starvation of the bacteriumeLife · 2026Article
- Beyond ICACS omega · 2026Article
- Fishing community resilience to harmful algal blooms: social capital narratives of the 2016 crisis in southern Chile.Frontiers in public health · 2026Article
- "Algal-dromes": a novel conceptual approach to illness in humans exposed to harmful algal bloom toxins.Frontiers in toxicology · 2026Review
- Microbial degradation of jellyfish detritus promotes phytoplankton growth in coastal marine ecosystems.ISME communications · 2026Article
- Total Nitrogen Shapes Diversity of Bloom-Forming Dinoflagellates in the Baltic Coastal Waters.Biology · 2025Article
- Advancements in Satellite Observations of Inland and Coastal Waters: Building Towards a Global Validation Network.Remote sensing · 2025Article
- Factors Affecting Risk Perceptions about the Human Health Effects Resulting from Harmful Algal Bloom Exposure.Journal of contemporary water research & education · 2025Article
- Unveiling the 2017Microorganisms · 2025Article
- Declining ocean greenness and phytoplankton blooms in low to mid-latitudes under a warming climate.Science advances · 2025Article
- Paralytic shellfish toxins and seabirds: evaluating sublethal effects, behavioral responses, and ecological implications of saxitoxin ingestion by common murres (Uria aalge).Harmful algae · 2025Article
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- Rapidly increasing cyanobacteria blooms in the subarctic Great Slave Lake: observations from Indigenous, local, and scientific knowledge.Scientific reports · 2025Article
- Article
16 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
19 authors at 18 institutions in 13 countries.
Funding
Abstract
Global trends in the occurrence, toxicity and risk posed by harmful algal blooms to natural systems, human health and coastal economies are poorly constrained, but are widely thought to be increasing due to climate change and nutrient pollution. Here, we conduct a statistical analysis on a global dataset extracted from the Harmful Algae Event Database and Ocean Biodiversity Information System for the period 1985-2018 to investigate temporal trends in the frequency and distribution of marine harmful algal blooms. We find no uniform global trend in the number of harmful algal events and their distribution over time, once data were adjusted for regional variations in monitoring effort. Varying and contrasting regional trends were driven by differences in bloom species, type and emergent impacts. Our findings suggest that intensified monitoring efforts associated with increased aquaculture production are responsible for the perceived increase in harmful algae events and that there is no empirical support for broad statements regarding increasing global trends. Instead, trends need to be considered regionally and at the species level.
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.