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The green tides caused by the overgrowth of Ulva prolifera in the Yellow Sea of China have been occurring every summer since 2007. The green tide is a major environmental concern that involves the impacts from natural, anthropogenic, physicochemical and algae factors along with the warming of local water.
Ulvaria obscura is a common marine algae, typically identified in algal blooms referred to as "Green Tides". [3] [4] The species is distinct in its ability to produce the neurotransmitter dopamine as a herbivore defense mechanism.
General characteristics of Ulva australis include a smooth surface, distromatic blades, lobed fronds, and thallus color from dark green to light grass green. It can be either free floating or attached by a single holdfast. Its cells appear to be irregularly arranged, have rounded edges, and have shapes such as rectilinear, square, and ...
Although most contemporary ulvophytes are marine macroalgae , ancestral ulvophytes may have been freshwater, unicellular green algae. Molecular phylogenetic evidence suggests that macroscopic growth was achieved independently in the various major lineages of Ulvophyceae ( Ulvales - Ulotrichales , Trentepohliales , Cladophorales , Bryopsidales ...
The sea lettuces comprise the genus Ulva, a group of edible green algae that is widely distributed along the coasts of the world's oceans. The type species within the genus Ulva is Ulva lactuca , lactuca being Latin for "lettuce".
Ulva linza found in Rhode Island have branched or unbranched flattened tubes. [5] The thallus length ranges from 1.9 –36 cm with a mean length of 18.6 cm. The thallus width ranges from 0.2 to 4.8 cm with a mean width of 1.4 cm. [5] Ulva linza can be distinguished by its smooth thallus, most with a ruffled margin. [5]
Composite image illustrating the diversity of Ulvophyceae. Top left: Ulva.Top right: Caulerpa.Bottom left: Bornetella.Bottom right: Dictyosphaeria. The Ulvophyceae or ulvophytes are a class of green algae, [1] distinguished mainly on the basis of ultrastructural morphology, life cycle and molecular phylogenetic data. [2]
The genus Umbraulva was first described by Bae and Lee in 2011. [1] After studying the morphology of Ulva japonica (Holmes), Ulva amamiensis, and Ulva olivascens, and analyzing their DNA sequences, Bae and Lee proposed the new genus Umbraulva, and placed the three species they initially studied into that genus as Umbraulva japonica (Holmes), Umbraulva amamiensis (Tanaka), and Umbraulva ...