Testing the coral fragment size-dependent survivorship hypothesis for the calcareous hydrozoan Millepora complanata

Lewis, JB

doi:10.3354/meps070101

Cited by 27 publications

(6 citation statements)

References 14 publications

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“…The seasonal growth assumption takes into account that species‐specific mean rates may covary as a result of unobserved seasonal factors (Appendix S1, Table S1). With or without fission size threshold . Fission rates were estimated in this study 19 months after transplantation, so rates may be specific to the range of observed colony sizes (consistent with observations that probability of fragmentation increases with colony size; Lewis ). Thus, thresholds (i.e.…”

Section: Methodssupporting

confidence: 85%

Use of Bayesian analysis with individual‐based modeling to project outcomes of coral restoration

Benjamin

Punongbayan

Cruz

et al. 2016

Restoration Ecology

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Various approaches to coral restoration have been developed to help increase rate of reef recovery from perturbations, among the most common of which is coral transplantation. Success is often evaluated based on short-term observations that capture only the initial phase of space colonization by coral transplants. Here, an individual-based model is developed to quantify uncertainty in future trajectories in experimental plots given past observations. Empirical data were used to estimate probabilistic growth, survival, and fission rates of Acropora pulchra and A. intermedia (order Scleractinia) in a sandy reef flat (Bolinao, Philippines). Simulations were initialized with different densities (25 or 50 transplants per species per 16 m 2 ) to forecast possible coral cover trajectories over a 5-year period. Given current conditions, there is risk of local extinction which is higher in low-density plots for both species, and higher for A. intermedia compared to A. pulchra regardless of density. While total coral cover is projected to increase, species composition in the future is more likely to be highly uneven. The model was used to quantify effect on recovery rate of protection from pulse anthropogenic disturbances, given different initial transplantation densities. When monitoring data are limited in time, stochastic models may be used to assess whether the restoration trajectory is heading toward the desired state and at what rate, and foresee system response to various adaptive interventions. Implications for Practice• Coral cover may be restored in reef patches of several square meters after physical disturbance if the latter will not recur. • Members of the genus Acropora (order Scleractinia) are potential candidates for restoration because they grow quickly and can effectively reproduce asexually, provided local environmental conditions are suitable. • Differences exist among Acropora species in terms of growth and survival as well as competitive ability, factors that should be considered when choosing an appropriate combination, and transplant density of species to initiate coral population and community development in previously degraded reef areas.

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Section: Methodssupporting

confidence: 85%

Use of Bayesian analysis with individual‐based modeling to project outcomes of coral restoration

Benjamin

Punongbayan

Cruz

et al. 2016

Restoration Ecology

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“…However, encrusting portions of colonies bear zooids (de Weerdt 1984) which were expanded. Transects were established perpendicular to the shore at 2 to 4 m depth, near the mid-reef crest where the hydrocoral is most abundant (Lewis 1991). Ten transects were marked out and the number of expanded and contracted colony branches recorded at different times during the morning and afternoon under a variety of prevailing sea and weather conditions during a period of about 1 mo.…”

Section: Methodsmentioning

confidence: 99%

Heterotrophy in corals: zooplankton predation by the hydrocoral Millepora complanata

Lewis¹

1992

Mar. Ecol. Prog. Ser.

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Heterotrophy is examined in the hydrocoral Millepora complanata Lamarck and compared with scleractinian corals. Natural zooplankton catch rates and digestion rates were determined from counts of prey items captured by the gastrozooids on surfaces of millepore colonies collected in the field. The mean catch rate or feeding rate (+ SD) was 7.1 ? 4.10 prey items cm-2 surface d-' and complete digestion of prey required about 24 h. Copepods comprised the bulk (63 %) of the diet. Based on the argument that measured catch rates of corals are highly variable because of plankton patchiness, and the assumption that millepore colonies with expanded zooids feed both day and night, a potential feeding or catch rate was derived from the mean number of gastrozooids on the colonies times the digestion rate. Daily food consumption estimated from the potential catch rates exceeded estimates of daily energy needed for respiration by a factor of 6.7. It was concluded that heterotrophic feeding in M. complanata can potentially supply more than the daily energy requirements of the hydrocoral and may exceed feeding rates of scleractinian corals.

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“…A number of studies have measured the importance of asexual propagation in coral communities (e.g. Tunnicliffe 1981, Lasker 1990, Lee & Noble 1990, Lewis 1991, Smith & Hughes 1999, have described the biological and ecological consequences of fragmentation upon colonies (e.g. Highsmith 1982, Lasker 1984, and have revealed specific mechanical strategies that enhance, and even control, fragmentation (e.g.…”

Section: Sexual and Asexual Propagation In Cupuladriid Bryozoansmentioning

confidence: 99%

Life history variation in cupuladriid bryozoans from either side of the Isthmus of Panama

O’Dea

Herrera-Cubilla²,

Fortunato³

et al. 2004

Mar. Ecol. Prog. Ser.

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Cupuladriid bryozoans are able to produce new colonies both sexually through the production of larvae and asexually via fragmentation. The prevalence of asexual propagation and the physical and biological processes of fragmentation in cupuladriid species are currently little understood. In a large survey comprising collections of nearly 32 000 cupuladriids from either side of the Isthmus of Panama, patterns of cupuladriid species richness, occurrence and abundance were measured together with levels of asexual propagation, fragmentation and regeneration. The Caribbean side is characterised by greater cupuladriid diversity and dominance of the genus Cupuladria over Discoporella while the eastern Pacific coast is characterised by lower cupuladriid diversity and complete dominance of Discoporella. Life history variation was not found to be constrained by phylogeny and no systematic differences were found in life history or morphologies between Cupuladria and Discoporella to explain the patterns in generic dominance across the isthmus. Nonetheless, striking differences occur in life history strategies across the isthmus. Eastern Pacific species tend to be large, flat and lightly calcified, resulting in high levels of fragmentation and hence asexual propagation. Conversely, Caribbean species produce a wider range of morphologies, including small, highly domed and highly calcified colonies that protect from fragmentation. By correlating colony morphologies with reproductive life histories within species, we show that morphologies, particularly colony strength and size, control levels of fragmentation and thus mode of propagation in cupuladriids. Life history strategies that promote asexual propagation are found to track levels of primary productivity both between oceans across the isthmus and between regions within oceans.

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Testing the coral fragment size-dependent survivorship hypothesis for the calcareous hydrozoan Millepora complanata

Cited by 27 publications

References 14 publications

Use of Bayesian analysis with individual‐based modeling to project outcomes of coral restoration

Use of Bayesian analysis with individual‐based modeling to project outcomes of coral restoration

Heterotrophy in corals: zooplankton predation by the hydrocoral Millepora complanata

Life history variation in cupuladriid bryozoans from either side of the Isthmus of Panama

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