Functional morphology of coral shape and passive hydrodynamic self-righting in recentManicina areolata

Hubmann, Bernhard; Piller, Werner E.; Riegl, Bernhard

doi:10.1007/bf03043778

Cited by 10 publications

(9 citation statements)

References 8 publications

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“…This method was also used to study locomotion in Cycloseris distorta, which showed that this mushroom coral uses peristaltic movements to crawl toward light (Yamashiro and Nishihira 1995). Besides mushroom corals, righting and migration have also been observed in other free-living corals, such as in the Caribbean Manicina areolata (Linnaeus, 1758) (see Fabricius 1964;Hubman et al 2002;Uhrin et al 2005) and the Indo-Pacific Heteropsammia cochlea (Spengler, 1781) (see Goreau and Yonge 1968). The latter studies were based on field studies.…”

Section: Discussionmentioning

confidence: 99%

Mobility and self-righting by a free-living mushroom coral through pulsed inflation

Hoeksema

Bongaerts

2015

Mar Biodiv

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Locomotion and self-righting in an overturned juvenile mushroom coral, Herpolitha limax, was documented and analyzed by the use of time-lapse photography. The coral used a series of rhythmic polyp expansions and contractions to move itself. The complete process of the righting took place within six hours, consisting of a stationary phase, a shuffle phase, a sudden flip-over, and a recovery phase. The mouth of the coral may be used to eject water, which can perhaps be applied as a means of jet propulsion. This report demonstrates that time-lapse photography can be applied to analyze all kinds of behavior in marine invertebrates that move too slow for regular observations.

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Section: Discussionmentioning

confidence: 99%

Mobility and self-righting by a free-living mushroom coral through pulsed inflation

Hoeksema

Bongaerts

2015

Mar Biodiv

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“…, 2002) this shape might have been advantageous for the two radiolitid species for remaining in upright position lll1der the influence of bottom water currents through "passive digging" behaviour. This behaviour is controlled by the interplay of sediment erosion or accumulation and the shell posture in the immediate vicinity of the semi-buried individual (Hubmann et al , 2002).…”

Section: Discussionmentioning

confidence: 99%

Late Aptian-Albian primitive Radiolitidae (bivalves, hippuritoidea) from Spain and SW France

Massé¹,

Fenerci-Masse²,

Vilas³

et al. 2007

Cretaceous Research

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The late Aptian-Albian radiolitid taxa, Praeradiolites cantabricus (Douville) and Praeradiolites ibizanus Astre, from SW France and Spain, are transferred to Eoradiolites. Eoradiolites jumillensis novo sp. is described from southern Spain, while the so-called "Sphaerulites cantabricus" sensu Toucas (1907) is moved to Praeradiolites and may be of Late Cretaceous age. The Eoradiolites cantabricus group of species is mainly Clansayesian-early Albian in age and possesses an advanced evolutionary status, mainly regarding shell size and cellular structure. Praeradiolites may have been delived from Eoradiolites jumillensis novo sp. through paedomorphosis while Eoradiolites cantabricus may have been the source for Sphaerulites. Our study shows that the names Sphaerulites and Praeradiolites cannot be applied to pre-Cenomanian Radiolitidae and that Eoradiolites was the foremost genus in Late Aptian-Albian times in terms of species biodiversity. The Eoradiolites cantabricus group is restricted to the northwestern Mediterranean Tethyan margin.

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“…Inflators are not only capable of (re)moving sediment continuously, but they also can endure siltation rates 5-10 times higher than regularly found on coral reefs. Many of these coral species are small forms, living attached or loose in sand bottoms, such as the Caribbean faviid Manicina areolata and the Pacific fungiid corals (Schuhmacher, 1977(Schuhmacher, , 1979Hoeksema, 1993;Johnson, 1992;Hubmann et al, 2002;Uhrin et al, 2005;Sorauf and Harries, 2010;Bongaerts et al, 2012).…”

Section: Response Categorymentioning

confidence: 97%

“…With the exception of free-living species, corals-once settledare sessile organisms (Hoeksema, 1988(Hoeksema, , 1993Hubmann et al, 2002;Hoeksema and de Voogd, 2012). As they cannot move away from unfavourable conditions, growth-form and physiological changes regulate their interactions with the environment.…”

Section: The Impacts Of Sediment Disturbance On Coralsmentioning

confidence: 99%

“…Sediment rejection is a function of morphology, orientation, growth habit and behaviour of the coral and the amount and type of sediment (Bak and Elgershuizen, 1976). Corals growing in areas where they typically experience strong currents or relatively high wave energy generally have no need for effective (active) sediment rejection mechanisms, as the turbulence of the water assists in the passive cleaning of any sediment that may have accumulated on the coral tissue (Riegl et al, 1996;Hubmann et al, 2002;Sorauf and Harries, 2010). Many branching corals appear very effective in passive rejection of sediment because of their colony morphology, but they may suffer from reduced light levels.…”

Section: Sedimentation: Feeding and Respirationmentioning

confidence: 99%

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Environmental impacts of dredging and other sediment disturbances on corals: A review

Erftemeijer

Riegl

Hoeksema

et al. 2012

Marine Pollution Bulletin

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647

451

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A review of published literature on the sensitivity of corals to turbidity and sedimentation is presented, with an emphasis on the effects of dredging. The risks and severity of impact from dredging (and other sediment disturbances) on corals are primarily related to the intensity, duration and frequency of exposure to increased turbidity and sedimentation. The sensitivity of a coral reef to dredging impacts and its ability to recover depend on the antecedent ecological conditions of the reef, its resilience and the ambient conditions normally experienced. Effects of sediment stress have so far been investigated in 89 coral species (~10% of all known reef-building corals). Results of these investigations have provided a generic understanding of tolerance levels, response mechanisms, adaptations and threshold levels of corals to the effects of natural and anthropogenic sediment disturbances. Coral polyps undergo stress from high suspended-sediment concentrations and the subsequent effects on light attenuation which affect their algal symbionts. Minimum light requirements of corals range from <1% to as much as 60% of surface irradiance. Reported tolerance limits of coral reef systems for chronic suspended-sediment concentrations range from <10 mg L(-1) in pristine offshore reef areas to >100 mg L(-1) in marginal nearshore reefs. Some individual coral species can tolerate short-term exposure (days) to suspended-sediment concentrations as high as 1000 mg L(-1) while others show mortality after exposure (weeks) to concentrations as low as 30 mg L(-1). The duration that corals can survive high turbidities ranges from several days (sensitive species) to at least 5-6 weeks (tolerant species). Increased sedimentation can cause smothering and burial of coral polyps, shading, tissue necrosis and population explosions of bacteria in coral mucus. Fine sediments tend to have greater effects on corals than coarse sediments. Turbidity and sedimentation also reduce the recruitment, survival and settlement of coral larvae. Maximum sedimentation rates that can be tolerated by different corals range from <10 mg cm(-2) d(-1) to >400 mg cm(-2) d(-1). The durations that corals can survive high sedimentation rates range from <24 h for sensitive species to a few weeks (>4 weeks of high sedimentation or >14 days complete burial) for very tolerant species. Hypotheses to explain substantial differences in sensitivity between different coral species include the growth form of coral colonies and the size of the coral polyp or calyx. The validity of these hypotheses was tested on the basis of 77 published studies on the effects of turbidity and sedimentation on 89 coral species. The results of this analysis reveal a significant relationship of coral sensitivity to turbidity and sedimentation with growth form, but not with calyx size. Some of the variation in sensitivities reported in the literature may have been caused by differences in the type and particle size of sediments applied in experiments. The ability of many corals (in varying degre...

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Functional morphology of coral shape and passive hydrodynamic self-righting in recentManicina areolata

Cited by 10 publications

References 8 publications

Mobility and self-righting by a free-living mushroom coral through pulsed inflation

Mobility and self-righting by a free-living mushroom coral through pulsed inflation

Late Aptian-Albian primitive Radiolitidae (bivalves, hippuritoidea) from Spain and SW France

Environmental impacts of dredging and other sediment disturbances on corals: A review

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