The seaweeds Myriogloea major Asensi (Chordariacea, Phaeophyceae) and Gayralia oxysperma (Kützing) K.L. Vinogradova ex Scagel et al. (Ulvophyceae, Chlorophyta): a case of range extension in the Southwestern Atlantic Ocean?

  title={The seaweeds Myriogloea major Asensi (Chordariacea, Phaeophyceae) and Gayralia oxysperma (K{\"u}tzing) K.L. Vinogradova ex Scagel et al. (Ulvophyceae, Chlorophyta): a case of range extension in the Southwestern Atlantic Ocean?},
  author={Franciane Pellizzari and Gabriela V{\'e}lez-Rubio and M. Cristine-Silva and Alvar Carranza},
  journal={Marine Biodiversity},
This study reports the first occurrences of the brown seaweed Myriogloea major Asensi (Chordariacea, Phaeophyceae) and the green seaweed Gayralia oxysperma (Kützing) K.L. Vinogradova ex Scagel et al. (Ulvophyceae, Chlorophyta) along the Uruguayan coast. These new records could represent respectively a northward and southward range extension for M. major and G. oxysperma in the Southwestern Atlantic. These findings are particularly relevant since the Uruguayan coast has been highlighted as one… 

Macroalgae morpho-functional groups in Southern marine ecosystems: rocky intertidal in the Southwestern Atlantic (33°–35° S)

An easy to apply classification of macroalgal organisms based on morphological traits is developed and support easy recognition of algal assemblages and rapid ecological analysis, and might contribute to ecological studies and monitoring programs.

Isolation of fungi associated with macroalgae from maritime Antarctica and their production of agarolytic and carrageenolytic activities

The results indicated that the Antarctic macroalgae shelter saprobe fungi that produce enzymes with the potential to degrade algal biomass and might release essential nutrients into the Antarctic Ocean.

Latitudinal patterns of species diversity on South American rocky shores: Local processes lead to contrasting trends in regional and local species diversity

We evaluated whether patterns of species diversity (α, β and γ) of rocky shore assemblages followed latitudinal gradients (i.e. LDGs) along the South American coasts, and tested hypotheses related to



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Ulva pertusa Kjellman (Ulvales, Chlorophyta), which is widely distributed in the Pacific Ocean, has been detected on the NW Atlantic coast of the Iberian Peninsula (Galicia, Spain), and the species-level identification as U. pertusa was confirmed by molecular studies.

Cultivation of the edible green seaweed Gayralia (Chlorophyta) in southern Brazil

The simplicity of the cultivation method, reasonable growth rates and extensive favorable area for cultivation suggest that mariculture of Gayralia sp.

Life-history, thallus ontogeny, and the effects of temperature, irradiance and salinity on growth of the edible green seaweed Gayralia spp. (Chlorophyta) from Southern Brazil

Gayralia K.L. Vinogr. is a monostromatic green alga of commercial importance in the southern Brazil, and its cultivation is being considered. This paper reports some basic aspects of the biology of

Culture Studies on the Life History of Myriogloea chilensis (Mont.) Llaña (Phaeophyceae, Chordariales)

The life history of Myriogloea from central Chile was studied in laboratory culture and male gametes showed an increased tendency towards apomictic development of haploid sporophytes, morphologically indistinguishable from heterozygous plants.

Morphology, ontogeny, and phylogenetic position of Gayralia brasiliensis sp. nov. (Ulotrichales, Chlorophyta) from the southern coast of Brazil

Phylogenetic analysis based on rDNA internal transcribed spacer sequences showed that Gayralia brasiliensis specimens formed a monophyletic group closely related to Monostroma nitidum and two unidentified monostromatic species from Japan and Tanzania.

Seasonal periodicity and reproduction of brown algae (Phaeophyceae) at Puerto Deseado (Patagonia)

Brown algal vegetation at the beginning of the 1970s was document to provide a baseline dataset before the start up of large-scale port activity, including seawater temperature, season, and hydrodynamics.

Community Structure and Intertidal Zonation of the Macroinfauna on the Atlantic Coast of Uruguay

Five sandy beaches, covering a complete range of dissipative-reflective categories, were studied at the Atlantic coast of Uruguay. The objective of this study was to analyze the species richness,

Diversity and spatial distribution of seaweeds in the South Shetland Islands, Antarctica: an updated database for environmental monitoring under climate change scenarios

The present study characterizes the spatial distribution of seaweed diversity on eight islands from the South Shetlands based on an updated taxonomic survey, discussing the higher number of species

Contenido en algunos nutrientes del alga marina comestible, Monostroma undulatum, Wittrock de la costa patogónica argentina

Results show that this green seaweed is an important source for protein, fiber, macronutrients minerals and vitamin C, during the macroscopic period and there was an important fluctuation that must be taken into account to consider the commercial collection to use it in human nutrition.


The mechanism of spreading in the amphipolar species studied was migration of vegetative microthalli, and the more unlikely alternative hypothesis of continuous populations through the tropics during a cooler epoch would imply a drop in seawater temperatures to approximately 20° C in summer and 15°C in winter, which is not supported by paleoclimatic evidence.