Reef waters stimulate substratum exploration in planulae from brooding Caribbean corals

  title={Reef waters stimulate substratum exploration in planulae from brooding Caribbean corals},
  author={Daniel F. Gleason and Bret S. Danilowicz and Cormac Nolan},
  journal={Coral Reefs},
This study tested the hypothesis that waters surrounding reefs with healthy coral populations are more likely than degraded sites to induce planulae to navigate downward and begin benthic probing. [] Key Method In the laboratory, larvae from two brooding Caribbean coral species, Agaricia tenuifolia and Porites astreoides, were introduced to seawater collected at (1) 1 m above shallow, healthy reef with high-coral cover, (2) 1 m above shallow, degraded reef with high-macroalgal cover, and (3) ~400 m ocean…
Chemically mediated behavior of recruiting corals and fishes: A tipping point that may limit reef recovery
It is shown that juveniles of both corals and fishes are repelled by chemical cues from fished, seaweed-dominated reefs but attracted to cues from coral-dominated areas where fishing is prohibited, suggesting that species that appear passive in their choice of habitat may have stronger preferences than the authors thought.
Transmission distance of chemical cues from coral habitats: implications for marine larval settlement in context of reef degradation
Overall, the study showed that chemical cues emitted by a live coral reef were transported farthest away in the ocean compared to those from a dead coral reef and that fish larvae could detect these cues until 1 km and support the assumption of a larval settlement ineffective in degraded coral reefs.
Can benthic algae mediate larval behavior and settlement of the coral Acropora muricata?
Results showed that A. muricata larvae can settle successfully in the absence of external stimuli, and a diverse combination of signals and/or modifications of microenvironments by algae and their associated microbial communities may explain the pattern observed in coral settlement.
Coral larvae avoid substratum exploration and settlement in low-oxygen environments
It is suggested that low-oxygen areas can negatively influence the settlement success of coral larvae and that oxygen concentration may be used as a cue for coral larval swimming and settlement behavior.
Coral recruitment on a high-latitude reef at Sodwana Bay, South Africa : research methods and dynamics.
Coral recruitment is a key process that contributes to the community structure and resilience of coral reefs. As such, quantification of this process is important to assist with the management of
Modeling vertical coral connectivity and mesophotic refugia
This study is the first of its kind to simulate larval dispersal and settlement between habitats of different depths, and these findings have local, regional, and global implications for predicting and managing coral reef persistence in a changing climate.
Coral larvae are poor swimmers and require fine-scale reef structure to settle
It is shown experimentally that turbulence generated by fine scale structure is required to deliver larvae to the substratum even in conditions mimicking calm back-reef flow environments, which indicates structural complexity at a number of scales assists coral recovery.
The impact of macroalgae and cyanobacteria on larval survival and settlement of the scleractinian corals Acropora palmata, A. cervicornis and Pseudodiploria strigosa
These larval experiments show that some macrophytes can reduce coral larval survival and settlement even in the presence of highly preferred substrata.
Habitat selection, facilitation, and biotic settlement cues affect distribution and performance of coral recruits in French Polynesia
  • N. Price
  • Environmental Science
  • 2010
In a field experiment exploring the relative importance of biotic cues and variability in habitat quality to recruitment of hard corals, pocilloporid and acroporid corals recruited more frequently to one species of CCA, Titanoderma prototypum, and significantly less so to other species ofCCA; these results are consistent with laboratory assays from other studies.
The fertilisation and recruitment dynamics of scleractinian corals on South Africa's high-latitude reefs
1 The production of coral offspring and their survival through early ontogeny to sexual maturity 2 are both vitally important for the persistence of coral-dominated reefs. Understanding factors 3


Chemical effects of macroalgae on larval settlement of the broadcast spawning coral Acropora millepora
The demonstration of waterborne effects suggests that macroalgae can influence coral settlement before larvae reach reef substrata, even on a crustose coralline alga known to induce settlement, and even where the immediate settlement location is free of macroalgal cover.
Recovery of Diadema antillarum reduces macroalgal cover and increases abundance of juvenile corals on a Caribbean reef
  • P. Edmunds, R. Carpenter
  • Environmental Science
    Proceedings of the National Academy of Sciences of the United States of America
  • 2001
Evidence of the initiation of such a reversal in Jamaica is presented, where shallow reefs at five sites along 8 km of coastline now are characterized by a sea urchin-grazed zone with a mean width of 60 m.
Effects of benthic algae on the replenishment of corals and the implications for the resilience of coral reefs
There is a serious lack of information about algal effects on coral replenishment, which are likely to cause bottlenecks in coral recovery and significantly reduce the resilience of coral reefs.
Herbivory and algal dynamics on the coral reef at Discovery Bay, Jamaica
Observations at Discovery Bay showed that Diadema reappeared on the shallow fore reef after 1996, accompanied by drastically reduced macroalgal cover, and they confirm the key role of herbivory in structuring shallow reef communities of the Caribbean.
Inhibition of coral recruitment by macroalgae and cyanobacteria
Evidence is provided that algae and cyanobacteria use tactics beyond space occupation to inhibit coral recruitment, thereby perpetuating reduced coral cover and limiting coral community recovery on reefs experiencing phase shifts or tempo- rary algal blooms.
Ultraviolet radiation effects on the behavior and recruitment of larvae from the reef coral Porites astreoides
This is the first demonstration in any reef-building coral species that planula larvae can detect UVR and that it affects their choice of a settlement site, and indicates that the capacity to detect and avoid habitats with biologically damaging levels of UVR may be one factor contributing to the successful recruitment of coral larvae.
Large-scale associations between macroalgal cover and grazer biomass on mid-depth reefs in the Caribbean
The abundance of macroalgae on lightly fished reefs may be a symptom of low coral cover in combination with the continuing absence of Diadema antillarum, a contributory factor in overfishing of grazing fishes.
Metamorphosis of a Scleractinian Coral in Response to Microbial Biofilms
This investigation demonstrates that complex microbial communities can induce coral metamorphosis in the absence of CCA, and reveals that coral reef biofilms were comprised of complex bacterial and microalgal communities which were distinct at each depth and time.
It is found that a suite of larval swimming and settling behaviors, in large part, drives the adult distribution of the leaf coral Agaricia humilis.
An Ancient Chemosensory Mechanism Brings New Life to Coral Reefs.
The authors' analyses of the metamorphic requirements of larvae in divergent coral families surprised us by revealing the existence of a common chemosensory mechanism that is required to bring larvae out of the plankton and onto the reef.