Overview of Australian and New Zealand harmful algal species occurrences and their societal impacts in the period 1985 to 2018, including a compilation of historic records

Hallegraeff, Gustaaf M.; Schweibold, Laura; Jaffrezic, Enora; Rhodes, Lesley; MacKenzie, Lincoln; Hay, B.; Farrell, H.

doi:10.1016/j.hal.2020.101848

Cited by 32 publications

(29 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Still, there were 13 Alexandrium species detected that were not previously known to be present in Australian marine waters, including A. andersonii, A. cohorticula, A. hiranoi, A. insuetum, A. leei, A. mediterraneum, Group II, A. monilatum, A. pohangense, A. satoanum, A. tamarense Group III, A. tamiyavanichii, A. tamutum and A. taylorii. Another HAB species not previously reported in Australian waters but detected at low relative abundances here is Karenia brevis [58]. These novel findings clearly highlight the usefulness of the ability to be able to detect rare and less abundant taxa utilising eDNA sampling and HTS genotyping.…”

Section: Table 2 Dissimilarity Within and Between The Two Locations Dsupporting

confidence: 63%

“…In contrast, one of the least abundant genera, Alexandrium (0.05-0.1%), was comprised of 17 species from the possible 23 contained in the DinoREF database, however all 23 Alexandrium species were identified in the whole assemblages (Additional file 1: Table S4 and S5). Of the species identified here, 11 are previously reported from Australian waters [16,57,58]. There are also many reports of Alexandrium catenella, Group IV, in Australian waters, a known HAB associated with paralytic shellfish poisoning; however, this species is not contained in the DinoREF database.…”

Section: Table 2 Dissimilarity Within and Between The Two Locations Dmentioning

confidence: 86%

See 1 more Smart Citation

Diversity of dinoflagellate assemblages in coastal temperate and offshore tropical waters of Australia

et al. 2021

View full text Add to dashboard Cite

Background Dinoflagellates are a ubiquitous and ecologically important component of marine phytoplankton communities, with particularly notable species including those associated with harmful algal blooms (HABs) and those that bioluminesce. High-throughput sequencing offers a novel approach compared to traditional microscopy for determining species assemblages and distributions of dinoflagellates, which are poorly known especially in Australian waters. Results We assessed the composition of dinoflagellate assemblages in two Australian locations: coastal temperate Port Phillip Bay and offshore tropical waters of Davies Reef (Great Barrier Reef). These locations differ in certain environmental parameters reflecting latitude as well as possible anthropogenic influences. Molecular taxonomic assessment revealed more species than traditional microscopy, and it showed statistically significant differences in dinoflagellate assemblages between locations. Bioluminescent species and known associates of HABs were present at both sites. Dinoflagellates in both areas were mainly represented by the order Gymnodiniales (66%—82% of total sequence reads). In the warm waters of Davies Reef, Gymnodiniales were equally represented by the two superclades, Gymnodiniales sensu stricto (33%) and Gyrodinium (34%). In contrast, in cooler waters of Port Phillip Bay, Gymnodiniales was mainly represented by Gyrodinium (82%). In both locations, bioluminescent dinoflagellates represented up to 0.24% of the total sequence reads, with Protoperidinium the most abundant genus. HAB-related species, mainly represented by Gyrodinium, were more abundant in Port Phillip Bay (up to 47%) than at Davies Reef (28%), potentially reflecting anthropogenic influence from highly populated and industrial areas surrounding the bay. The entire assemblage of dinoflagellates, as well as the subsets of HAB and bioluminescent species, were strongly correlated with water quality parameters (R2 = 0.56–0.92). Significant predictors differed between the subsets: HAB assemblages were explained by salinity, temperature, dissolved oxygen, and total dissolved solids; whereas, bioluminescent assemblages were explained only by salinity and dissolved oxygen, and had greater variability. Conclusion High-throughput sequencing and genotyping revealed greater diversity of dinoflagellate assemblages than previously known in both subtropical and temperate Australian waters. Significant correlations of assemblage structure with environmental variables suggest the potential for explaining the distribution and composition of both HAB species and bioluminescent species.

show abstract

Section: Table 2 Dissimilarity Within and Between The Two Locations Dsupporting

confidence: 63%

Section: Table 2 Dissimilarity Within and Between The Two Locations Dmentioning

confidence: 86%

Diversity of dinoflagellate assemblages in coastal temperate and offshore tropical waters of Australia

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Aquacultured finfish mortalities caused by the taxonomically unrelated microalgal genera Chattonella, Pseudochattonella, Heterosigma, Karenia, Karlodinium, Margalefidinium (Cochlodinium) and Prymnesium/ Chrysochromulina globally account for much greater economic damage than HABs contaminating seafood 39 . While most shellfish toxins have now been well characterised and are effectively monitored and regulated, finfish held captive in intensive aquaculture operations continue to be vulnerable to HABs (USD71M loss in Japan in 1972, USD70M in Korea in 1995, USD290M in China in 2012, USD100M in Norway in 2019 [19][20][21][22][23][24][25][26][27][28][29][30][31][32] ), even though the causative ichthyotoxins usually are of no human health significance. The 2016 Chilean salmon mortality that caused a record USD800M loss led to major social unrest 40 .…”

Section: Resultsmentioning

confidence: 99%

“…Each region was assigned a regional editorial team tasked with collating information on HAB species occurrences and impacts, with the data and interpretations published in a special issue of the journal Harmful Algae (vol. 102, February 2021) [19][20][21][22][23][24][25][26][27][28][29][30] . As more sampling could lead to more observations of HABs, we estimated sampling effort using OBIS, the most comprehensive dataset on marine species records, as a proxy for sampling effort.…”

Section: Methodsmentioning

confidence: 99%

Perceived global increase in algal blooms is attributable to intensified monitoring and emerging bloom impacts

Hallegraeff

Anderson

Belin

et al. 2021

Commun Earth Environ

Self Cite

253

View full text Add to dashboard Cite

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.

show abstract

“…The regional appearance and increase of other HAB phenomena have in contrast been attributed to climate-driven range expansion; exemplified by the dinoflagellate Noctiluca scintillans. Highly visible red tides and bioluminescent spectacles caused by Noctiluca were first documented in Australia from Sydney Harbour in 1860 (Bennett, 1860), have been more frequently reported since the 1990s, and even caused temporary closure of popular Sydney tourist beaches (Hallegraeff et al, 2020). Amongst the causes of N. scintillans blooms are eutrophication, upwelling and ocean circulation (Dela Cruz et al, 2002, 2003).…”

Section: Introductionmentioning

confidence: 99%

Recovering sedimentary ancient DNA of harmful dinoflagellates off Eastern Tasmania, Australia, over the last 9 000 years

Armbrecht

Paine

Bolch

et al. 2021

Preprint

View full text Add to dashboard Cite

Harmful algal blooms (HABs) have significantly impacted the seafood industry along the Tasmanian east coast over the past three decades, and are expected to change in frequency and magnitude due to climate change induced changing oceanographic conditions. To investigate the long-term history of regional HABs, a combination of palynological and sedimentary ancient DNA (sedaDNA) analyses was applied to marine sediment cores from inshore (up to 145 years old) and offshore (up to ~9,000 years) sites at Maria Island, southeast Tasmania. Analyses focused Paralytic Shellfish Toxin (PST) producing dinoflagellates Alexandrium catenella and Gymnodinium catenatum, and the red-tide dinoflagellate Noctiluca scintillans, which were specifically targeted using a hybridization capture sedaDNA technique. Identification of primulin-stained A. catenella cysts throughout the inshore sediment core, together with sedaDNA evidence of a bloom-phase of Alexandrium ~15 years ago, indicates recent stimulation of a cryptic endemic population. Morphologically similar but unstained Alexandrium cysts were observed throughout the offshore core, with sedaDNA confirming the presence of A. catenella from ~8,300 years ago to present. Gymnodinium catenatum cysts were detected only in inshore surface sediments from 30 years ago to present, supporting previous evidence of a 1970s introduction via shipping ballast water. sedaDNA confirmed the presence of G. catenatum-related sequences in the inshore and offshore cores, however, unambiguous species identification could not be achieved due to limited reference sequence coverage of Gymnodinium. Our hybridization capture sedaDNA data also confirmed the historically recent dispersal of the non-fossilizing dinoflagellate Noctiluca scintillans, detected inshore from ~30 years ago, matching first observations of this species in Tasmanian waters in 1994. At the offshore site, N. scintillans sedaDNA was detected only in surface sediments, confirming a recent climate-driven range expansion this species. This study provides new insights into the distribution and abundance of three HAB species in the Tasmanian region, including clues to past bloom phases. Further research into paleo-environmental conditions and paleo-community structure are required to identify the factors driving bloom phases through time and predict plankton community responses under different future climate scenarios.

show abstract

Overview of Australian and New Zealand harmful algal species occurrences and their societal impacts in the period 1985 to 2018, including a compilation of historic records

Cited by 32 publications

References 71 publications

Diversity of dinoflagellate assemblages in coastal temperate and offshore tropical waters of Australia

Diversity of dinoflagellate assemblages in coastal temperate and offshore tropical waters of Australia

Perceived global increase in algal blooms is attributable to intensified monitoring and emerging bloom impacts

Recovering sedimentary ancient DNA of harmful dinoflagellates off Eastern Tasmania, Australia, over the last 9 000 years

Contact Info

Product

Resources

About