• Corpus ID: 46565807

Population dynamics of corallivores (Drupella and Acanthaster) on coral reefs of Koh Tao, a diving destination in the Gulf of Thailand

@inproceedings{Scott2017PopulationDO,
  title={Population dynamics of corallivores (Drupella and Acanthaster) on coral reefs of Koh Tao, a diving destination in the Gulf of Thailand},
  author={Chad M. Scott and Rahul Mehrotra and Margaux Y. Hein and Moerland and Bert W. Hoeksema},
  year={2017}
}
Diving-related tourism is known to contribute both directly and indirectly to reef degradation around the globe, including Koh Tao, a popular diving destination in the Gulf of Thailand. Of the known publications on reef threats at Koh Tao, only three mention the effects of highly abundant coral predators. The present study combines results of a nine-year long period (2006-2014) of reef surveys to evaluate the abundance and impact of corallivorous Drupella snails and Acanthaster sea stars in… 

Figures and Tables from this paper

Assessing population collapse of Drupella spp. (Mollusca: Gastropoda) 2 years after a coral bleaching event in the Republic of Maldives

TLDR
It is suggested that monitoring programs collect temporal- and spatial-scale data on non-outbreaking populations or non-aggregating populations to understand the dynamics of predation related to the co-occurrence of anthropogenic and natural impacts.

Temporal and Spatial Abundance of Acanthaster cf. solaris (Echinodermata: Asteroidea) in a National Park in the Gulf of California, Mexico: 2005–2016

Abstract:The crown-of-thorns seastar (COTS; Acanthaster spp.) inhabits coral reefs across the Pacific Ocean. Based on studies in the Western Pacific, when densities exceed ~15 specimens per ha, coral

Temporal and Spatial Abundance of Acanthaster cf. solaris (Echinodermata: Asteroidea) in a National Park in the Gulf of California, Mexico: 2005–20161

Abstract: The crown-of-thorns seastar (COTS; Acanthaster spp.) inhabits coral reefs across the Pacific Ocean. Based on studies in the Western Pacific, when densities exceed ∼15 specimens per ha,

Spatial variability in the abundance and prey selection of the corallivorous snail Drupella spp. in the southeastern Hainan Island, China

Global climate change has caused extensive loss of biodiversity and ecosystem function globally, particularly in coral reefs in shallow tropical waters. As the corallivorous snails represent

New insights into the ecology and corallivory of Culcita sp. (Echinodermata: Asteroidea) in the Republic of Maldives

TLDR
Dietary preferences for specific coral colonies or genera have the potential to generate local shifts in coral community composition and structure and may affect reef recovery following natural and anthropogenic disturbance in an already impacted environment such as the Maldivian reefs.

Predation by feeding aggregations of Drupella spp. inhibits the recovery of reefs damaged by a mass bleaching event

TLDR
High densities of two corallivorous gastropods, Drupella cornus and D. rugosa, may delay the recovery of coral reefs impacted by mass bleaching events by aggregating on the remaining corals by exerting predation pressure.

Monitoring and assessing a 2-year outbreak of the corallivorous seastar Acanthaster planci in Ari Atoll, Republic of Maldives

TLDR
The size structure analysis revealed a multimodal distribution dominated by individuals between 20 and 30 cm, suggesting that the outbreak may have resulted from a few nearby mass spawning events, and the electivity index showed a preference for corals of the genera Favites and Pavona.

In-situ egg deposition by corallivorous snails on mushroom corals at Koh Tao (Gulf of Thailand)

TLDR
The first record of in-situ egg deposition by Drupella is presented, confirming the prediction by Sam et al. (2016) that recently consumed coral skeletons can serve as a substrate for egg-capsule attachment.

Corals hosting symbiotic hydrozoans are less susceptible to predation and disease

TLDR
It is shown that, after accounting for geographical, ecological and co-evolutionary factors, signs of disease and corallivory are significantly lower in coral colonies hosting hydrozoans than in hydrozoan-free ones, suggesting that symbiotic hydrozoANS may play an active role in protecting their scleractinian hosts from stresses induced by warming water temperatures.

References

SHOWING 1-10 OF 84 REFERENCES

Spawning observation of Acanthaster planci in the Gulf of Thailand

TLDR
In mid-September of 2014, spawning by A. planci was observed on the island of Koh Tao, Gulf of Thailand, providing the first record of natural spawning for this species in the proximity of the South China Sea.

Dietary shift in corallivorous Drupella snails following a major bleaching event at Koh Tao, Gulf of Thailand

TLDR
It seems that bleaching mortality reduced the availability of preferred prey, causing the corallivores to switch to less preferred species that occur in dense aggregations.

Predator Crown-of-Thorns Starfish (Acanthaster planci) Outbreak, Mass Mortality of Corals, and Cascading Effects on Reef Fish and Benthic Communities

TLDR
This study elucidates the processes involved in an Acanthaster outbreak and shows how sessile benthic communities and resident coral-feeding fish assemblages were subsequently affected by the decline of corals.

Effects of Recreational Scuba Diving on Caribbean Coral and Fish Communities

TLDR
This study shows that even relatively low levels of diving can have pronounced effects manifested in shifts in dominance patterns rather than loss of overall coral cover, and that Conserving the character of these reefs may require tighter controls on diving intensity.

Acanthaster planci impact on coral communities at permanent transect sites on Bruneian reefs, with a regional overview and a critique on outbreak causes

  • D. Lane
  • Environmental Science
    Journal of the Marine Biological Association of the United Kingdom
  • 2011
The submerged coral reefs of Brunei, little-impacted by human activity and characterized by high live coral cover, have no recorded history in recent decades of the presence of the crown-of-thorns

Stability of reef fish assemblages: responses to coral recovery after catastrophic predation by Acanthaster planci

TLDR
Results demonstrate that the structure of the disturbed fish assemblage had returned to its pre-perturbation state on the near-completion of coral recovery on a large reef degraded by an outbreak of the coral-feeding starfish Acanthaster planci.

Coral-eating snail Drupella cornus population increases in Kenyan coral reef lagoons

TLDR
Observed population increases in Kenya and western Australia may be due to oceanic conditions which improved D. cornus recruitment success during the late 1980s.

Selective coral mortality associated with outbreaks of Acanthaster planci L. in Bootless Bay, Papua New Guinea.

Acanthaster planci infestations of reefs and coral assemblages in Japan: a retrospective analysis of control efforts

Reef-building corals have been extensively degraded by Acanthaster planci infestations which have continued to spread throughout the Ryukyu archipelago since 1969. Intensive control efforts were
...