Non-marine algae of Australia : 4. Floristic survey of some colonial green macroalgae (Chlorophyta)

Abstract

Entwisle, T

Flora and newly recorded species of three colonial genera (Euteramorus, Coenocystis, and Gloeocystis) in freshwater chlorococcal green algae from Korea

“…These were not aerial or subaerial habitats but living mixed with other plants and humic materials in swamp. The sample of this species fitted within G. polydermatica as circumscribed by and Entwistle and Skinner (2001).…”

First record of Tetraspora gelatinosa Link ex Desvaux (Tetrasporales, Chlorophyceae) in the state of Goiás, Central-Western Brazil

“…Richter et al (2014) considered T. gelatinosa characteristic of cold habitats and suggested that, in tropical regions, the vegetative cells tend to be smaller compared with temperate areas. Indeed, some cells of specimens found in the Samambaia Reservoir were smaller (< 6 µm) than some obtained from temperate and even tropical zones (Ettl and Gartner 1988, Entwisle and Skinner 2001, Peres 2011, Richter et al 2014; however, dimensions close to the largest cells representative of this taxon were also observed, independently from the region of occurrence.…”

“…Individuals of T. gelatinosa are normally non-motile in the vegetative phase and, similar to other Tetrasporaceae, present pseudoflagella (Ettl and Gartner 1988). These pseudoflagella differ from flagella because they lack the 2 central microtubules (Entwisle and Skinner 2001). In some cases, the pseudoflagella do not extend beyond the mucilaginous matrix, and therefore, are difficult to observe (Entwisle and Skinner 2001).…”

“…These pseudoflagella differ from flagella because they lack the 2 central microtubules (Entwisle and Skinner 2001). In some cases, the pseudoflagella do not extend beyond the mucilaginous matrix, and therefore, are difficult to observe (Entwisle and Skinner 2001). However, in zoospores and gametes, the pseudoflagella are shed and flagella are produced (Entwisle and Skinner 2001).…”

“…The Samambaia Reservoir presented low nutrient concentrations (Table 1) and is considered ultraoligotrophic according to the levels of phosphorus and orthophosphate (Lamparelli 2004). Similarly, T. gelatinosa has been found in pristine environments, with oligotrophic to mesotrophic conditions and, consequently, low concentration of nutrients (Entwisle and Skinner 2001, Gutowski et al 2004, Richter et al 2014. Differently from the population recorded in the most disturbed sites in streams of the Mexican basin, and therefore, tolerant to high DIN concentrations (Rodríguez-Flores and Carmona-Jiménez 2018).…”