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National Committee on Marine Sciences (NCMS)

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Author: search.filters.author.Ang, P. O.SDG: search.filters.sdg.SDG 14 - Life below water

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    The genus Sargassum (Phaeophyta, Sargassaceae) from Balibago, Calatagan, Philippines
    Ang, P. O.; Trono, G. C. (Walter de Gruyter GmbH, 1987)
    Eight species of Sargassum: S. baccularia (Mertens) C. Agardh, S. cinctum J. Agardh, S. crassifolium J. A-gardh, S. ilicifolium (Turner) C. Agardh, S. notarisii Zanardini, S. oligocystum Montagne, S. paniculatum J. Agardh, and S. siliquosum J. Agardh are reported from Balibago, Calatagan, Philippines. Growth and changes in the morphology of the two most common species, S. paniculatum and S. siliquosum, were noted throughout their different growth phases over 1 1/2 years. Collections of material representing growth stages of the other species were made at periodic intervals. The more consistent morphological characters for each species were recognized and their utility in taxonomic work was discussed. These characters include outline and length/width ratio of the leaves characteristic of each branching order of laterals, shape and size of the vesicles, muricatous nature of the terminal branchlets, branching pattern of the receptacles, morphology of the female receptacles and the type of holdfast.
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    Decadal stability in coral cover could mask hidden changes on reefs in the East Asian Seas
    Chan, Y. K. S.; Affendi, Y. A.; Ang, P. O.; Baria-Rodriguez, M. V.; Chen, C. A.; Chui, A. P. Y.; Glue, M.; Huang, H.; Kuo, C-Y.; Kim, S. W.; Lam, V. Y. Y.; Lane, D. J. W.; Lian, J. S.; Lin, S. M. N. N.; Lunn, Z.; Nañola, C. L.; Nguyen, V. L.; Park, H. S.; Sutthacheep, M.; Vo, S. T.; Vibol, O.; Waheed, Z.; Yamano, H.; Yeemin, T.; Yong, E.; Kimura, T.; Tun, K.; Chou, L. M.; Huang, D. (Springer, 2023-06-10)
    Coral reefs in the Central Indo-Pacific region comprise some of the most diverse and yet threatened marine habitats. While reef monitoring has grown throughout the region in recent years, studies of coral reef benthic cover remain limited in spatial and temporal scales. Here, we analysed 24,365 reef surveys performed over 37 years at 1972 sites throughout East Asia by the Global Coral Reef Monitoring Network using Bayesian approaches. Our results show that overall coral cover at surveyed reefs has not declined as suggested in previous studies and compared to reef regions like the Caribbean. Concurrently, macroalgal cover has not increased, with no indications of phase shifts from coral to macroalgal dominance on reefs. Yet, models incorporating socio-economic and environmental variables reveal negative associations of coral cover with coastal urbanisation and sea surface temperature. The diversity of reef assemblages may have mitigated cover declines thus far, but climate change could threaten reef resilience. We recommend prioritisation of regionally coordinated, locally collaborative long-term studies for better contextualisation of monitoring data and analyses, which are essential for achieving reef conservation goals.