Phylogeography of<i>Padina boryana</i>(Dictyotales, Phaeophyceae) around the Thai-Malay Peninsula

Wichachucherd, Bongkot; Prathep, Anchana; Zuccarello, Giuseppe C.

doi:10.1080/09670262.2014.918658

Cited by 13 publications

(5 citation statements)

References 52 publications

(50 reference statements)

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“…This study aims to provide a better understanding of the calcification process, focusing on its role in carbon economy and its relationship to photosynthesis in three dominant calcified macroalgae in upper sublittoral areas in Phuket, Thailand, P. boryana, H. opuntia and H. macroloba [44][45][46][47]. Our findings will improve estimations on the amount of carbon stored in the vegetated marine ecosystems and support the evidence-based management on mitigating the impact of human-induced climate change.…”

Section: Introductionmentioning

confidence: 85%

Calcification in Three Common Calcified Algae from Phuket, Thailand: Potential Relevance on Seawater Carbonate Chemistry and Link to Photosynthetic Process

Buapet

Sinutok

2021

Plants

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Calcifying macroalgae contribute significantly to the structure and function of tropical marine ecosystems. Their calcification and photosynthetic processes are not well understood despite their critical role in marine carbon cycles and high vulnerability to environmental changes. This study aims to provide a better understanding of the macroalgal calcification process, focusing on its relevance concerning seawater carbonate chemistry and its relationship to photosynthesis in three dominant calcified macroalgae in Thailand, Padina boryana, Halimeda macroloba and Halimeda opuntia. Morphological and microstructural attributes of the three macroalgae were analyzed and subsequently linked to their calcification rates and responses to inhibition of photosynthesis. In the first experiment, seawater pH, total alkalinity and total dissolved inorganic carbon were measured after incubation of the macroalgae in the light and after equilibration of the seawater with air. Estimations of carbon uptake into photosynthesis and calcification and carbon release into air were obtained thereafter. Our results provide evidence that calcification of the three calcified macroalgae is a potential source of CO2, where calcification by H. opuntia and H. macroloba leads to a greater release of CO2 per biomass weight than P. boryana. Nevertheless, this capacity is expected to vary on a diurnal basis, as the second experiment indicates that calcification is highly coupled to photosynthetic activity. Lower pH as a result of inhibited photosynthesis under darkness imposes more negative effects on H. opuntia and H. macroloba than on P. boryana, implying that they are more sensitive to acidification. These effects were worsened when photosynthesis was inhibited by 3-(3,4-dichlorophenyl)-1,1-dimethylurea, highlighting the significance of photosynthetic electron transport-dependent processes. Our findings suggest that estimations of the amount of carbon stored in the vegetated marine ecosystems should account for macroalgal calcification as a potential carbon source while considering diurnal variations in photosynthesis and seawater pH in a natural setting.

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Section: Introductionmentioning

confidence: 85%

Calcification in Three Common Calcified Algae from Phuket, Thailand: Potential Relevance on Seawater Carbonate Chemistry and Link to Photosynthetic Process

Buapet

Sinutok

2021

Plants

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“…This low level of genetic variations of algae in Thai waters is common, and previously reported in Padina boryana Thivy (Wichachucherd et al . ) and Sargassum polycystum C. Agardh (Kantachumpoo et al . ).…”

Section: Discussionmentioning

confidence: 99%

High morpho‐anatomical variability in Halimeda macroloba (Bryopsidales, Chlorophyta) in Thai waters

Pongparadon

Zuccarello

Prathep

2017

Phycological Research

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Halimeda macroloba is a common widespread and morphologically variable species in the Indo-Pacific Ocean. A series of morphometric data (16 morphological and 46 anatomical variables) and the chloroplast-encoded tufA gene were examined to explore the morphological and genetic variations within the species and to better determine species boundaries in H. macroloba in Thai waters. Moreover, the environmental conditions, which may affect morphological variations in H. macroloba, especially of Haplotype I were examined. Our results showed that H. macroloba has more morpho-anatomical variability and broader species boundaries than previously thought in several characters: holdfast type, segment shape and size, node height with differences in pore size, the presence of two additional patterns of peripheral utricle as seen in surface view, and additional layers of utricles (up to seven layers). Additionally, two new variable characteristics have been reported for the first time, i.e. shape and margin of peripheral utricles. Water depth and light correlated with thallus morphology, larger thalli and segments with a greater number of utricle layers were associated with subtidal plants, while smaller thalli and segments were found in the intertidal or high light intensity areas. The high plasticity of this species may explain why in the Indo-Pacific Ocean this species is common and dominant.

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“…Repeated exposure and flooding of the Sunda and Sahul shelves resulted in the isolation of marine taxa, providing an important mechanism for population differentiation and incipient speciation. In addition, changes in the oceanographic dynamic system have been shown to have had a strong influence on marine algal species distribution and genetic connectivity in Southeast Asia (Kantachumpoo et al 2014, Wichachucherd et al 2014.…”

Section: Introductionmentioning

confidence: 99%

Small-scale genetic structure of Gracilaria salicornia and its red algal parasite, G. babae (Gracilariaceae, Rhodophyta), in Malaysia

Lim

Phang

2015

Botanica Marina

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The present study compares genetic structure from the plastid rbcL, mitochondrial cox1, and nuclear internal transcribed spacer (ITS) sequences among 13 populations of Gracilaria salicornia and its red algal parasite, G. babae, in Malaysia. Owing to the unique biology of the red algal parasite, identical phylogeographies were inferred from the rbcL and cox1 sequences in both G. babae and its host, G. salicornia. Despite the low genetic variation, rbcL and cox1 showed a concordant phylogeographic split that largely corresponds to Peninsular Malaysia and East Malaysia, except for a sample from East Malaysia that was consistently grouped with samples from the peninsula. On the other hand, G. salicornia was separated from G. babae in the midpoint-rooted phylogeny inferred from ITS data despite the failure to retrieve the two taxa in reciprocal monophyly. Gracilaria salicornia was less diverse and lacked apparent geographic structure. In contrast, the ITS data revealed considerable genetic diversity and fine-scale genetic structuring in G. babae within Malaysian waters, probably as a result of adaptation to the local host population.

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Phylogeography ofPadina boryana(Dictyotales, Phaeophyceae) around the Thai-Malay Peninsula

Cited by 13 publications

References 52 publications

Calcification in Three Common Calcified Algae from Phuket, Thailand: Potential Relevance on Seawater Carbonate Chemistry and Link to Photosynthetic Process

Calcification in Three Common Calcified Algae from Phuket, Thailand: Potential Relevance on Seawater Carbonate Chemistry and Link to Photosynthetic Process

High morpho‐anatomical variability in Halimeda macroloba (Bryopsidales, Chlorophyta) in Thai waters

Small-scale genetic structure of Gracilaria salicornia and its red algal parasite, G. babae (Gracilariaceae, Rhodophyta), in Malaysia

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