Scleractinian assemblages under sediment input: their characteristics and relation to the nutrient input concept

Sanders, Diethard; Baron-Szabo, Rosemarie C.

doi:10.1016/j.palaeo.2004.10.008

Cited by 132 publications

(113 citation statements)

References 174 publications

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“…5). Acropora is possibly only found in abundance at Raffles Lighthouse owing to its inability to tolerate the environmental conditions, especially sedimentation (Sanders & Baron-Szabo 2005), at reefs closer to the mainland. Finally, subsequent studies by Todd et al (2004a,b) demonstrated that F. speciosa is phenotypically plastic and, therefore, this species could simply have adjusted its morphology in accordance to its immediate surroundings.…”

Section: Discussionmentioning

confidence: 99%

Simulating the transport of broadcast coral larvae among the Southern Islands of Singapore

Tay¹,

Todd

Rosshaug

et al. 2012

Aquat. Biol.

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Singapore's coral reefs have experienced significant anthropogenic impacts for at least 4 decades. Ongoing reef restoration efforts, however, may not be sustainable if there is no natural coral recruitment. Knowledge of coral reef connectivity, which can be identified using hydrodynamic-advection and individual-based models, can help inform reef management decisions. Here, a 2-dimensional, hydrodynamic, flexible mesh model (MIKE 21 FM) coupled with a Lagrangian particle-tracking module was used to simulate larval transport among Singapore's Southern Islands. In each simulation, neutrally buoyant, passive particles representing coral planulae were released into the hydrodynamic conditions present during the coral multi-species synchronous spawning event of April 2007. When the number of larvae released was proportional to live coral cover (between 2400 and 46 200 particles), 3 islands: Pulau Sudong, Pulau Pawai and Pulau Senang, which all lie within a military Live Firing Area, were identified as the most robust sources of larvae seeding the rest of the Southern Islands. However, when equal numbers of larvae (18 000 larvae per site) were released from all sites in an effort to identify nursery areas with the greatest potential to seed other reefs, 2 different and upstream islands, Sisters' Islands and Kusu Island, were found to be better sources of larvae. We suggest all 5 of these sites should be identified for conservation. Additional effort to enhance coral cover, and hence larval export, at Sisters' Islands and Kusu Island may help increase recruitment on downstream reefs.

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Section: Discussionmentioning

confidence: 99%

Simulating the transport of broadcast coral larvae among the Southern Islands of Singapore

Tay¹,

Todd

Rosshaug

et al. 2012

Aquat. Biol.

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“…Riegl & Branch (1995) observed that an experimental increase in sedimentation decreased the ratio of productivity/respiration and increased the mucus production of many coral species. Sedimentation can also cause the initiation of cleaning mechanisms by ciliary action, tentacular movement and polyp expansion (Sanders & Baron-Szabo, 2005). These events represent expenditure of energy that in other conditions could be used for growth (Dodge & Vaisnys, 1977;Riegl & Branch, 1995;Babcock & Smith, 2000;Nughes & Roberts, 2003a).…”

Section: Discussionmentioning

confidence: 99%

Colony size-frequency distributions among different populations of the scleractinan coral Siderastrea stellata in Southwestern Atlantic: implications for life history patterns

Barros

Pires

2006

Braz. j. oceanogr.

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A B S T R A C TColony size-frequency distributions of reef corals may be used to infer growth potential and population responses upon environmental changes. The present paper compares the size structure of colonies of Siderastrea stellata Verrill, 1868, among 11 sites, six of them distributed along a gradient of sediment deposition in Abrolhos, Bahia, Brazil (18 o S). Results indicated that the population structure is likely to be influenced by local conditions, rather than large scale factors, such as latitude. The 11 distributions, however, showed higher frequencies of small size classes. Class 1 (up to 2.5 cm diameter) was always present and the frequency of colonies from size class 3 (10 cm diameter) tended to decrease in all sites. Comparison among the six Abrolhos sites showed that S. stellata has advantages at sites with intermediate sedimentation, where colonies attain larger sizes, probably, reflecting a higher survivorship over time. The present study showed that, despite the influence of environmental conditions on parameters of the populations such as size of colony, the life history strategy of S. stellata reflects a local adaptation that allows its development and survivorship in shallow waters and horizontal substrates, sites characterized by high mortality rates. R E S U M ODistribuições de freqüências de classes de tamanho de colônias de corais recifais, associadas a dados de fecundidade e crescimento, podem ser utilizadas para inferir o potencial de crescimento e respostas da população frente às variações ambientais. Apresentamos análise da estrutura de tamanho de colônias do coral Siderastrea stellata Verrill, 1868, em 11 locais, seis desses distribuídos ao longo de um gradiente de sedimentação em Abrolhos, Bahia, Brasil (18 o S). Os resultados demonstraram ausência de um padrão latitudinal, indicando maior influência de fatores locais. Em Abrolhos, locais com taxas de deposição de sedimento intermediárias apresentaram os maiores coeficientes de variação e tamanhos médios, indicando condições mais propícias para o desenvolvimento de populações desse coral na região. As 11 distribuições, porém, apresentaram maior freqüência de classes pequenas. A classe 1 (colônias com diâmetro médio de até 2,5cm) ocorreu em todos os locais. A partir da classe 3 (10 cm em diâmetro) as freqüências diminuíram consideravelmente. Esses dados, associados ao fato da espécie se reproduzir cedo e incubar larva, refletem uma estratégia de sobrevivência, em águas rasas e substratos horizontais, caracterizada por alta taxa de mortalidade e tempo de vida curto.

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“…High fluxes of both terrigenous and autochthonous sediments are widely identified to have both direct and indirect inhibitory effects on coral reef growth (Larcombe et al, 2001;Erftemeijer et al, 2012;Sanders and Baron-Szabo, 2005;Salles et al, 2018a). For instance, elevated turbidity on midouter platform reefs caused by the suspension of sediment on the Pleistocene reef substrate during initial flooding ∼ 9 ka is hypothesised to be responsible for a delayed initiation of coral growth in the southern Great Barrier Reef (GBR) (Dechnik et al, 2015;Salles et al, 2018b).…”

Section: Sediment Inputmentioning

confidence: 99%

Exploring coral reef responses to millennial-scale climatic forcings: insights from the 1-D numerical tool pyReef-Core v1.0

et al. 2018

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Abstract. Assemblages of corals characterise specific reef biozones and the environmental conditions that change spatially across a reef and with depth. Drill cores through fossil reefs record the time and depth distribution of assemblages, which captures a partial history of the vertical growth response of reefs to changing palaeoenvironmental conditions. The effects of environmental factors on reef growth are well understood on ecological timescales but are poorly constrained at centennial to geological timescales. pyReefCore is a stratigraphic forward model designed to solve the problem of unobservable environmental processes controlling vertical reef development by simulating the physical, biological and sedimentological processes that determine vertical assemblage changes in drill cores. It models the stratigraphic development of coral reefs at centennial to millennial timescales under environmental forcing conditions including accommodation (relative sea-level upward growth), oceanic variability (flow speed, nutrients, pH and temperature), sediment input and tectonics. It also simulates competitive coral assemblage interactions using the generalised Lotka-Volterra system of equations (GLVEs) and can be used to infer the influence of environmental conditions on the zonation and vertical accretion and stratigraphic succession of coral assemblages over decadal timescales and greater. The tool can quantitatively test carbonate platform development under the influence of ecological and environmental processes and efficiently interpret vertical growth and karstification patterns observed in drill cores. We provide two realistic case studies illustrating the basic capabilities of the model and use it to reconstruct (1) the Holocene history (from 8500 years to present) of coral community responses to environmental changes and (2) the evolution of an idealised coral reef core since the last interglacial (from 140 000 years to present) under the influence of sea-level change, subsidence and karstification. We find that the model reproduces the details of the formation of existing coral reef stratigraphic sequences both in terms of assemblages succession, accretion rates and depositional thicknesses. It can be applied to estimate the impact of changing environmental conditions on growth rates and patterns under many different settings and initial conditions.

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Scleractinian assemblages under sediment input: their characteristics and relation to the nutrient input concept

Cited by 132 publications

References 174 publications

Simulating the transport of broadcast coral larvae among the Southern Islands of Singapore

Simulating the transport of broadcast coral larvae among the Southern Islands of Singapore

Colony size-frequency distributions among different populations of the scleractinan coral Siderastrea stellata in Southwestern Atlantic: implications for life history patterns

Exploring coral reef responses to millennial-scale climatic forcings: insights from the 1-D numerical tool pyReef-Core v1.0

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