Given the problems of species delimitation in algae using morphology or sexual compatibility, molecular data are becoming standard for delimiting and testing their traditional boundaries. The idea that separately evolving metapopulation lineages, along with theoretical progress phylogenetic population genetic analyses, has led to development new methods delimitation. We review these recent developments DNA-based methods, discuss how they have changed continue change our understanding algal...

The genus Caulerpa consists of about 75 species tropical to subtropical siphonous green algae. To better understand the evolutionary history genus, a molecular phylogeny was inferred from chloroplast tuf A sequences 23 taxa. sequence Caulerpella ambigua included as potential outgroup. Results reveal that latter taxon is, indeed, sister all ingroup sequences. itself series relatively ancient and species‐poor lineages modern rapidly diversifying clade, containing most diversity. conflicts with...

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 420:103-112 (2010) - DOI: https://doi.org/10.3354/meps08893 Genetic structure of giant kelp Macrocystis pyrifera along southeastern Pacific E. C. Macaya1,2,*, G. Zuccarello1 1School Biological Sciences, Victoria University Wellington, PO Box 600, New Zealand 2Present address: Departamento de Oceanografía,...

Intraspecific studies of red algae have relied on nuclear or plastid markers rather than mitochondrial data to address questions systematics, biogeography population genetics. In this study, primers were developed that spanned the noncoding intergenic region between cytochrome oxidase subunit 2 and 3 genes. These demonstrated be successful a variety in different orders: Gracilariales, Bonnemaisoniales Ceramiales (families: Delesseriaceae, Ceramiaceae Rhodomelaceae). Amplification products...

The brown alga Macrocystis C. Agardh is widely distributed throughout the cold temperate waters of Northern and Southern hemispheres, forming ecologically diverse productive kelp forests. taxonomy this has been under constant discussion. Since first description, species have mostly described by holdfast blade morphology; however, importance these taxonomic characters questioned. Based on a morphological study, genus recently synonymized into single species, M. pyrifera (L.) Agardh, but...

Red algae of the Bostrychia radicans/B. moritziana complex are common in warm temperate areas North America. Phylogenetic analysis both plastid and mitochondrial DNA sequence data revealed seven distinct evolutionary lineages among worldwide samples. Although only two haplotypes (plastid mitochondrial) were found Pacific Mexico, four 11 a similar latitudinal spread along Atlantic coast United States. On U.S. one haplotype was northern samples (Connecticut to Carolina), whereas further south...

Abstract The genus Tribonema (Xanthophyceae) is a common component of many freshwater ecosystems. It distinguished by its H-shaped bipartite walls and filamentous habit. Species identification has relied on few morphological characters, especially filament size plastid numbers. We approached the question interspecific relationships within sequencing plastid-encoded rbcL gene 10 species Tribonema. sequenced multiple samples seven these from throughout Europe. Our data suggest that T....

Abstract The recognition of broad biogeographic provinces provides an important framework for ecological and conservation biological research. Marine biologists have long recognized distinct in southern Australia, primarily on the basis qualitative differences intertidal species assemblages. Here we provide a priori test these traditional eastern (Peronian), western (Flindersian) south‐eastern (Maugean) provinces. Specifically, analyse distributional data approximately 1500 algal using newly...

Marine biologists and biogeographers have long been puzzled by apparently non-dispersive coastal taxa that nonetheless extensive transoceanic distributions. We here carried out a broad-scale phylogeographic study to test whether two widespread Southern Hemisphere species of non-buoyant littoral macroalgae are capable long-distance dispersal. Samples were collected from along the coasts southern Chile, New Zealand several subAntarctic islands, with focus on high latitude populations in path...

Collectively known as eucheumatoids, Eucheuma denticulatum, Kappaphycus alvarezii, K. malesianus, and striatus are the main farmed seaweed species in Philippines. The success of farming for over five decades country is due, part, to high diversity cultivars maintained by Filipino farmers. Notwithstanding fact that many eucheumatoid presently (and consistently) recognized farmers, there has been no attempt summarize current state local traditional knowledge about this group, especially with...

The trend in naming genera based almost exclusively on molecular data, and not morphological diagnostic characters, is increasing. In bifurcating phylogenetic trees generic cut-offs are arbitrary, but at the bare minimum nomenclatural changes should be supported by multiple methodologies using appropriate models for all various gene partitions, strong support with branch methods, also result adding to our knowledge of interrelationships taxa. We believe that a recent taxonomic treatment...

The paradigm of past climate-driven range shifts structuring the distribution marine intraspecific biodiversity lacks replication in biological models exposed to comparable limiting conditions independent regions. This may lead confounding effects unlinked climate drivers. We aim fill this gap by asking whether global giant kelp (Macrocystis pyrifera) is explained changes occurring across two hemispheres. compared species' population genetic diversity and structure inferred with...

• Species of the ectomycorrhizal genus Leccinum are generally considered to be host specialists. We determined phylogenetic relationships between species from Europe and North America based on second internal transcribed spacer (ITS2) glyceraldehyde 3-phosphate dehydrogenase (Gapdh). plotted associations onto phylogenies using maximum likelihood parsimony approaches. Resolution phylogeny was greater with Gapdh vs ITS2, plus ITS were highly incongruent. In coding region evolved clocklike,...

The species Bostrychia calliptera and B. pinnata, separated by cortication of main axis, were analysed sequencing regions from the three genomes (nuclear: large-subunit ribosomal RNA; mitochondrial: cox2–3 spacer; plastid: Rubisco spacer) to determine phylogeographic relationships among pantropical isolates. All genetic produced congruent phylogenetic relationships, with major lineages being revealed within this complex. One lineage comprised isolates Americas, another Indo-Pacific a third...

Molecular and breeding studies on two pan-tropical marine red algae reveal vastly different levels of genetic variation reproductive isolation. Sequenced DNA regions from the nuclear, mitochondrial plastid genomes (partial LSU rRNA, cox2-3 spacer, RuBisCo respectively) revealed high among individuals Spyridia filamentosa. An rbcL analysis shows that is a monophyletic genus distinct other Ceramiaceae sampled, suggesting could be paraphyletic. There complete congruence between all data sets S....

Explaining spatial patterns of biological organisation remains a central challenge for biogeographic studies. In marine systems, large-scale ocean currents can modify broad-scale by simultaneously connecting environmental (e.g. temperature, salinity and nutrients) amounts types dispersed propagules) properties adjacent distant regions. For example, steep gradients highly variable, disrupted flow should lead to heterogeneity in regional communities high species turnover. this study, we...

The taxonomy of the Cladophoraceae, a large family filamentous green algae, has been problematic for long time due to morphological simplicity, parallel evolution, phenotypic plasticity, and unknown distribution ranges. Partial subunit ( LSU ) rDNA sequences were generated 362 isolates, analyses concatenated dataset consisting unique small SSU 95 specimens greatly clarified phylogeny Cladophoraceae. phylogenetic reconstructions showed that three currently accepted genera Chaetomorpha ,...

The qualitative and quantitative occurrence of low molecular weight carbohydrates (LMWCs) in the Bangiophyceae is surveyed. Members orders Erythropeltidales ( Sahlingia Erythrotrichia ), Compsopogonales Compsopogon Bangiales Bangia Porphyra ) all contain floridoside and, some cases, D‐ L‐isofloridoside, making group chemotaxonomically most homogeneous; L‐isofloridoside occurred only Bangiales. Porphyridiales showed great variation carbohydrate types: Chroodactylon contained sorbitol,...