| dbo:abstract |
Aureoumbra lagunensis is a unicellular planktonic marine microalga that belongs in the genus Aureoumbra under the class Pelagophyceae. It is similar in morphology and pigments to Aureococcus anophagefferens and . The cell shape is spherical to subspherical and is 2.5 to 5.0 μm in diameter. It is golden-coloured and is encapsulated with extracellular polysaccharide layers and has a single chloroplast structure with pigments. Aureoumbra lagunensis thrives in a warm hypersaline environment as the greatest cell density has been found in water with salinity higher than 40 PSU and with temperatures between 25–30 °C (77–86 °F). Generally, the density of A. lagunensis is in the order of 106 cells mL−1, being higher in the summer months with lower abundance during the winter. Aureoumbra lagunensis causes harmful algal blooms and was the dominant microalga in the 7 year long brown tide (1990 - 1997) that happened in Laguna Madre, Texas. Its dominance over other coexisting phytoplankton is in part associated with its encapsulating mucus layer of exopolymer secretions (EPS) and its ability to revert from vegetative and resting cell forms. The A. lagunensis blooms cause a substantial increase in light attenuation, which in turn contributes to marine biodiversity loss, particularly phytoplankton communities and benthic invertebrates. A. lagunensis thrives in low-light conditions, where it can maintain high growth rates at 150 umol photons m−2 s−1, thus an increase in light attenuation causes a positive feedback which further perpetuates blooms. Aureoumbra lagunensis nutrient uptake is unlike other common microalgae. It uptakes inorganic nitrogen in the form of ammonium (NH4+) and nitrite (NO2−) and organic nitrogen in the form of urea, but does not utilize nitrate (NO3−). It uses environment dissolved organic phosphorus as the sole source to regenerate phosphate for growth. (en) |
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dbr:Campesterol dbr:Caribbean_Sea dbr:Mosquito_Lagoon dbr:Beta-Carotene dbr:Beta-Sitosterol dbr:Biodiversity_loss dbr:Pelagophyceae dbr:Unicellular_organism dbr:Urea dbr:Dephosphorylation dbr:Copepod dbr:Fucoxanthin dbr:Sterol dbr:Stigmasterol dbr:Harmful_algal_bloom dbr:Microalgae dbr:Aureococcus_anophagefferens dbr:Baffin_Bay_(Texas) dbc:Ochrophyta dbr:Synechococcus dbr:Alkaline_phosphatase dbr:Ammonium dbr:Cyanobacteria dbr:Nitrate dbr:Nitrite dbr:Carbon-to-nitrogen_ratio dbr:Benthic dbr:Primary_production dbr:Attenuation dbr:Invertebrate dbr:Iron dbr:Acartia_tonsa dbr:Chlorophyll_a dbr:Chlorophyll_c dbr:Chloroplast dbr:Cholesterol dbr:Laguna_Madre_(United_States) dbr:Diadinoxanthin dbr:Diatoxanthin dbr:Aureoumbra dbc:Species_described_in_1997 dbr:Phosphate dbr:Phycoerythrobilin dbr:Plankton dbr:Guantánamo_Bay dbr:Indian_River_Lagoon dbr:Mineral dbr:Brown_tide dbr:Salinity dbr:Euplotes dbr:Mulinia_lateralis dbr:Polysaccharide dbr:Protozoa dbr:Photosynthetic_efficiency dbr:Phycocyanin dbr:Crinosterol dbr:Allelopathic dbr:24-methylenecholesterol dbr:(24R)-24-propylcholesterol dbr:19'-butanoyloxyfucoxanthin dbr:24-isopropylcholesterol dbr:Aspidisca_sp dbr:Clerosterol dbr:Dihydrobrassicasterol dbr:E)-24-propylidenecholesterol dbr:Pelagococcus_subviridis dbr:Streblospio_Benedict |
| dbp:authority |
D.A.Stockwell, DeYoe, Hargraves & P.W.Johnson (en) |
| dbp:genus |
Aureoumbra (en) |
| dbp:species |
lagunensis (en) |
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dbt:Convert dbt:Proper_name dbt:Reflist dbt:Short_description dbt:Speciesbox dbt:Taxonbar |
| dcterms:subject |
dbc:Ochrophyta dbc:Species_described_in_1997 |
| rdfs:comment |
Aureoumbra lagunensis is a unicellular planktonic marine microalga that belongs in the genus Aureoumbra under the class Pelagophyceae. It is similar in morphology and pigments to Aureococcus anophagefferens and . The cell shape is spherical to subspherical and is 2.5 to 5.0 μm in diameter. It is golden-coloured and is encapsulated with extracellular polysaccharide layers and has a single chloroplast structure with pigments. (en) |
| rdfs:label |
Aureoumbra lagunensis (en) |
| owl:sameAs |
wikidata:Aureoumbra lagunensis https://global.dbpedia.org/id/9Gkro |
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wikipedia-en:Aureoumbra_lagunensis?oldid=1031998248&ns=0 |
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wikipedia-en:Aureoumbra_lagunensis |
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dbr:List_of_eukaryotic_picoplankton_species dbr:Mosquito_Lagoon dbr:University_of_Texas_Marine_Science_Institute dbr:A._lagunensis dbr:Aureoumbra dbr:Indian_River_Lagoon dbr:Aureoumbra_Lagunensis |
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wikipedia-en:Aureoumbra_lagunensis |