Effects of monsoon-driven wave action on coral reefs of Guam and implications for coral recruitment

Becerro, Mikel A.; Bonito, Victor; Paul, Valerie J.

doi:10.1007/s00338-005-0080-7

Cited by 26 publications

(17 citation statements)

References 56 publications

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“…1 km) influenced recovery rates as shown by the dominance of certain taxa at particular locations. For instance, Acropora had high coverage at locations with higher water flow while Porites, which is more tolerant to turbid environments, dominated the lo cation near a river, as has been observed in other studies (Storlazzi et al 2005;Becerro et al 2006;Dikou and van Woesik 2006). However, there was also variability between sites at a given location, particularly within locations 3 The structure of coral communities showed the greatest variability on the site scale.…”

Section: Discussionsupporting

confidence: 70%

“…If these processes differ on a small spatial scale, patchy distribu tions of corals may arise (van Woesik 2002). Another factor that may cause variation in the recovery process is local environmental conditions on reefs, such as exposure to monsoon winds, strong wave action, and/or the presence of terrestrial inputs (Storlazzi et al 2005;Becerro et al 2006;Dikou and van Woesik 2006).…”

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confidence: 99%

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Recovery of corals a decade after a thermal stress event at Motobu, Okinawa, Japan: spatial variability in winners and losers

Cabaitan

Yamamoto²,

Sakai

2012

Galaxea, Journal of Coral Reef Studies

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Coral communities at nine sites off the coast of Motobu, Okinawa, were examined 6 and 12 years after a 1998 mass coral bleaching event caused by anomalous seawater temperatures. Overall, mean coral coverage in creased from 17% in 2006 to 28% in 2010 at these sites, although these percentages were lower than the coral coverage at a nearby reef at Sesoko Island. Some of the corals that had not recovered (the "losers") at the Sesoko reef were found at some sites in the present study. Domi nant coral taxa differed among sites, probably because of differences in the environmental conditions at the sites, e.g., the so called massive type coral Porites dominated at a protected site near a river, while branching type Acropora was dominant at exposed sites. Acropora was one of the prominent short term losers, but contributed significantly to coral coverage increases due to its fast growth at some exposed sites. Adjacent reefs, which may share similar environmental conditions, also showed some variability, possibly due to processes such as coral recruit ment and post settlement survival, which acted on a smaller spatial scale. Multivariate analyses such as multi dimensional scaling were more sensitive than univariate analyses. Overall, recruitment was low, especially at sites with high coral coverage, which implies that remnant corals may have contributed to the recovery of these reefs.Coral communities in this area are recovering and there has been no apparent shift to algae dominated commu nities. The recovery of coral communities appears to be related to the life history traits of corals and environmental conditions.

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Section: Discussionsupporting

confidence: 70%

mentioning

confidence: 99%

Recovery of corals a decade after a thermal stress event at Motobu, Okinawa, Japan: spatial variability in winners and losers

Cabaitan

Yamamoto²,

Sakai

2012

Galaxea, Journal of Coral Reef Studies

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“…High chemical concentrations in the outer tissues could also be a defense against foulers (6,11). The higher concentration of isofistularin-3 (and other compounds) in the choanosome could be acting as a final deterrent against the specialist predator T. perversa, which is similar to what has been described for other opisthobranchsponge feeding interactions (5,7). Other roles, such as antibacterial activities, are far less investigated but could also explain the observed variation in secondary chemistry (6).…”

Section: Discussionmentioning

confidence: 65%

Exploring the Links between Natural Products and Bacterial Assemblages in the SpongeAplysina aerophoba

Sacristán-Soriano

Banaigs

Casamayor

et al. 2011

Appl Environ Microbiol

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The sponge Aplysina aerophoba produces a large diversity of brominated alkaloids (BAs) and hosts a complex microbial assemblage. Although BAs are located within sponge cells, the enzymes that bind halogen elements to organic compounds have been exclusively described in algae, fungi, and bacteria. Bacterial communities within A. aerophoba could therefore be involved in the biosynthesis of these compounds. This study investigates whether changes in both the concentration of BAs and the bacterial assemblages are correlated in A. aerophoba. To do so, we quantified major natural products using high-performance liquid chromatography and analyzed bacterial assemblages using denaturing gradient gel electrophoresis on the 16S rRNA gene. We identified multiple associations between bacteria and natural products, including a strong relationship between a Chloroflexi phylotype and aplysinamisin-1 and between an unidentified bacterium and aerophobin-2 and isofistularin-3. Our results suggest that these bacteria could either be involved in the production of BAs or be directly affected by them. To our knowledge, this is one of the first reports that find a significant correlation between natural products and bacterial populations in any benthic organism. Further investigating these associations will shed light on the organization and functioning of host-endobiont systems such as Aplysina aerophoba.

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“…show marked increases in biomass between May (peak settlement for P. astreoides) and August or September (settlement for broadcasting species assayed in the current study). Becerro et al (2006) also suggested that temporal variation in cyanobacterial standing stock may influence the settlement success of mass-spawning corals in Guam.…”

Section: Implications For Reef Restoration Design and Monitoringmentioning

confidence: 99%

Alternate benthic assemblages on reef restoration structures and cascading effects on coral settlement

Miller¹,

Valdivia²,

Kramer³

et al. 2009

Mar. Ecol. Prog. Ser.

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In coral reefs, restoration actions often involve artificial construction since physical structure enhances physico-chemical conditions for benthic communities and provides habitat for reef-associated fauna. We evaluated the performance of 4 restoration structures (RS, aged 5 to 12 yr) by comparing convergence of their benthic assemblages to adjacent reference reefs (REF). Multivariate clustering indicated that benthic assemblages were significantly distinct between RS and REF, as well as among sites. Differences were primarily attributable to weedy macroalgal and cyanobacterial groups, not slow-growing corals and crustose coralline algae. RS had a higher abundance of cyanobacterial turfs that can negatively affect adult and larval corals. To elucidate potential cascading effects on reef development, we tested whether exudates of the distinct RS and REF assemblages inhibit settlement by planulae of 3 coral species in laboratory assays. Relative settlement deterrence (versus seawater controls) was variable both between sites and among coral species. For example, both RS and REF exudates from one site were deterrent to settlement for Acropora palmata and Diploria strigosa, but, for Montastraea faveolata, RS (but not REF) exudates from a second site were deterrent, while RS exudates from the first site were not. Overall, results indicate that divergence of benthic assemblages is not simply attributable to incomplete succession, but appears to be a persistent, possibly stable state and that benthic algal/cyanobacterial assemblages on both RS and REF in these locations impair 'recruitment potential' for framework-building corals to some degree.

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Effects of monsoon-driven wave action on coral reefs of Guam and implications for coral recruitment

Cited by 26 publications

References 56 publications

Recovery of corals a decade after a thermal stress event at Motobu, Okinawa, Japan: spatial variability in winners and losers

Recovery of corals a decade after a thermal stress event at Motobu, Okinawa, Japan: spatial variability in winners and losers

Exploring the Links between Natural Products and Bacterial Assemblages in the SpongeAplysina aerophoba

Alternate benthic assemblages on reef restoration structures and cascading effects on coral settlement

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