Spatial, Seasonal and Secular Patterns in the Cover of Green Algae on Heron Reef Flat, Great Barrier Reef, Australia

Rogers, Ricardo

doi:10.1515/botm.1996.39.1-6.415

Cited by 12 publications

(13 citation statements)

References 2 publications

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“…The distribution of brown algae across the reef flat near Heron Island resembles that of the green algae (Rogers 1996). However, unlike the green algae, the cover of brown algae was significantly reduced by the passing of cyclone Fran in March 1992, showing little recovery in the following two years.…”

Section: Discussionmentioning

confidence: 90%

“…While the total fleshy algal cover was greatly reduced by cyclone Fran, the cover of fleshy green algae was not (Rogers 1996). While the total fleshy algal cover was greatly reduced by cyclone Fran, the cover of fleshy green algae was not (Rogers 1996).…”

Section: Introductionmentioning

confidence: 92%

“…That of Heron Reef has been described in general terms (Cribb 1966) and variation in cover of the green algae in space and time by Rogers (1996). That of Heron Reef has been described in general terms (Cribb 1966) and variation in cover of the green algae in space and time by Rogers (1996).…”

Section: Introductionmentioning

confidence: 99%

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Brown Algae on Heron Reef Fiat, Great Barrier Reef, Australia: Spatial, Seasonal and Secular Variation in Cover

Rogers¹

1997

Botanica Marina

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The cover of brown algae (Phaeophyta) on the reef flat south of Heron Island was measured 17 times between December 1990 and December 1995. Fleshy brown algae cover increased seaward across the reef flat to about the middle, then decreased sharply. Seasonal variations in cover were also apparent: Colpomenia spp., Chnoospora implexa and Turbinaria ornata showed a marked summer peak in cover. Lobophora variegata, Padina spp. and the species of Sargassum (S. polycystum, S. ilicifolium and S. oligophyllum) showed less distinct seasonal variation, but also tended to a peak in cover in summer. Tropical cyclone Fran passed over Heron Reef in March 1992, causing immediate and substantial changes in algal cover. All species of Sargassum showed a decrease in cover in the year following the cyclone, and had not fully recovered to pre-cyclone cover 42 months after the storm.

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Section: Discussionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 92%

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Brown Algae on Heron Reef Fiat, Great Barrier Reef, Australia: Spatial, Seasonal and Secular Variation in Cover

Rogers¹

1997

Botanica Marina

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“…Changes in water temperature, light, and nutrients (Drew & Abel 1988;Littler et al 1988;Williams & Dennison 1990;McGlathery et al 1992;Terrados & Ros 1992;Lobban & Harrison 1994;Rogers 1996;Van Tussenbroek et al 2006) as well as age, size, and density may all play a role. Some species of Halimeda show seasonal and lunar periodicity (Drew & Abel 1988;Clifton 1997;Clifton & Clifton 1999), and sexual reproduction in individual populations is synchronized (Clifton 1997;Vroom et al 2003).…”

Section: Reproductionmentioning

confidence: 99%

Diversity of Halimeda (Chlorophyta) from the Thai–Malay Peninsula

et al. 2015

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The Thai-Malay Peninsula separates the Andaman Sea from the Gulf of Thailand. This barrier is known to affect species distribution and genetic diversity of marine organisms. Biodiversity studies need a correct species taxonomy to interpret their biogeography; this is especially relevant in marine algae where morphological characters are few or cryptic. We address species distributions of the important macroalgal genus Halimeda. The combination of morphological data and chloroplast tufA gene sequences were used to identify species, and to reveal the variation among Halimeda species around the Thai-Malay Peninsula. The morpho-anatomical and molecular analysis showed eight species of Halimeda in Thai and Malaysian waters: Halimeda borneensis, H. discoidea, H. gigas, H. macroloba, H. micronesica, H. minima, H. opuntia, H. renschii, and two undescribed species. Three species, H. minima, H. renschii and H. micronesica, were reported for the first time from the area. Species variation was much greater in the Andaman Sea than in the Gulf of Thailand. Our results show great variation in species composition and genetic variation between the two sides of the peninsula, which could be due to differences in sea-surface currents and environmental differences between the two sides of this important marine barrier.

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“…The effects of spatio-temporal variability on tropical macroalgae, however, have mostly been inferred from the occurrence of seasonal peaks and have principally focused on large, conspicuous species (i.e., Sargassum) that bloom in the austral summer (Vuki and Price, 1994;McCook, 1997;Lefèvre and Bellwood, 2010). Comparatively, little is known about a large proportion of macroalgae, which predominantly grow in the austral autumn, winter and spring (Price, 1989;Rogers, 1996Rogers, , 1997Schaffelke and Klumpp, 1997). Furthermore, environmental factors do not operate independently, and investigations into how temperature and light interact to influence macroalgal seasonality have been less clear (Mathieson and Dawes, 1986;Fong and Zedler, 1993;Ferrari et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

The Dynamics of Coral-Algal Interactions in Space and Time on the Southern Great Barrier Reef

et al. 2018

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Globally, tropical coral reefs are being degraded by human activities, and as a result, reef-building corals have declined while macroalgae have increased. Recent work has focused on measuring macroalgal abundance in response to anthropogenic stressors. To accurately evaluate the effects of human impacts, however, it is necessary to understand the effects of natural processes on reef condition. To better understand how coral reef communities are influenced by natural processes, we investigated how spatial and seasonal changes in environmental conditions (temperature and PAR) influence benthic community structure, and the composition and frequency of coral-algal interactions across eight distinct zones and over a 23-month period at Heron reef on the southern Great Barrier Reef. Hard coral cover and macroalgal density showed distinct spatio-temporal variations, both within and between zones. Broad hard coral cover was significantly higher at the reef slope sites compared to the lagoon and was not significantly influenced by season. The composition and biomass of macroalgae increased in spring and declined in summer, with maximum macroalgal abundance corresponding with average temperatures of between 22 and 24 • C and average 24 h PAR of 300-500 µmol qanta m −2 s −1 . Changes in macroalgal biomass further influenced the composition and frequency of coral-algal interactions, however the incidence of coral-algal contact was best explained by coral cover. The results presented here emphasize that natural levels of macroalgae and coral-algal interactions are context-specific, and vary not only with-in zones, but in somewhat predictable seasonal cycles. Further, these results emphasize that the frequency of coral-algal interactions is dependent on hard coral, not just macroalgal cover, and an increase in coral-algal interactions does not necessarily translate to degradation of coral reefs.

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Spatial, Seasonal and Secular Patterns in the Cover of Green Algae on Heron Reef Flat, Great Barrier Reef, Australia

Cited by 12 publications

References 2 publications

Brown Algae on Heron Reef Fiat, Great Barrier Reef, Australia: Spatial, Seasonal and Secular Variation in Cover

Brown Algae on Heron Reef Fiat, Great Barrier Reef, Australia: Spatial, Seasonal and Secular Variation in Cover

Diversity of Halimeda (Chlorophyta) from the Thai–Malay Peninsula

The Dynamics of Coral-Algal Interactions in Space and Time on the Southern Great Barrier Reef

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