Post-bleaching alterations in coral reef communities

Elma, Eylem; Gullström, Martin; Yahya, Saleh; Jouffray, Jean-Baptiste; East, Holly K.; Nyström, Magnus

doi:10.1016/j.marpolbul.2022.114479

Cited by 5 publications

(5 citation statements)

References 90 publications

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“…The findings revealed a consistent pattern of increased herbivorous fish, but with the ongoing reduction in hard coral coverage and the loss of structural complexity, the abundance of herbivorous fish is expected to decline in the long run. Post-bleaching events often show both increases and decreases in algae, along with a decrease in sea urchin density across reef locations (Elma et al 2023). Meanwhile, it was also discovered that when herbivorous fish biomass and diversity are relatively low, macroalgal communities can evade herbivore control by experiencing increased growth (Doropoulos et al 2013).…”

Section: Dynamics Of Coral Recruitsmentioning

confidence: 99%

Dynamic of coral recruits in the Karimunjawa National Park, Central Java, Indonesia

TARIGAN,

MUNASIK,

WIJAYANTI

et al. 2024

Biodiversitas

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Abstract. Tarigan SAR, Munasik, Wijayanti DP, Muhidin, Rohman EA, Pardede S. 2024. Dynamic of coral recruits in the Karimunjawa National Park, Central Java, Indonesia. Biodiversitas 25: 869-880. After a disturbance event, coral reefs can recover naturally by recruiting new corals. These can be affected by environmental factors like the substrate's physical and biological structure, predation, and accidental mortality of recruits by grazers, as well as the number and size of parent corals supplying larvae. This study examined the connection between newly recruited corals and biological factors such as sea urchin density, herbivorous fish abundance, and hard coral coverage. The study was monitored changes in coral cover, juvenile coral density, herbivore abundance, and hard coral coverage at 43 locations and two depths (shallow; 2-3 m) and deep (8-10 m) from 2013 to 2022. The locations were distributed across six different zone systems: the core zone, protection zone, tourism zone, traditional fisheries zone, aquaculture zone, and rehabilitation zone. Multiple Linae Regression, ANOVA test, and Principal Component Analysis were employed to assess the relationship between coral recruitment and other variables. Results indicated that the coral recruitment density was not significantly different when comparing different zoning systems (two-way ANOVA test, P-value>0.05). Based on the PCA analysis, we found that in 2013 and 2019, excavator, sea urchin, browser, and hard coral have a positive relationship with coral recruitment, which implies that coral recruitment would increase as sea urchin, browser, and hard coral increase. Meanwhile, in 2019 and 2022, coral recruitment has a negative relationship with scraper, and also with hard coral growth (although only in 2022), implying that coral recruitment would decrease if scraper and hard coral increase. The study recommends restoring the role of herbivorous species in Karimunjawa National Park (KNP) by prioritizing them in conservation efforts and managing their populations.

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Section: Dynamics Of Coral Recruitsmentioning

confidence: 99%

Dynamic of coral recruits in the Karimunjawa National Park, Central Java, Indonesia

TARIGAN,

MUNASIK,

WIJAYANTI

et al. 2024

Biodiversitas

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“…During the 2015-2017 thermal stress events, reefs within the Indian Ocean region that experienced high to extreme levels of bleaching [149][150][151] altered to configurations dominated by epilithic algal matrix (e.g. Seychelles, Aldabra atoll [140]; Kenya, Zanzibar [13]) and rubble beds (e.g. Maldives [10]).…”

Section: Benthic Community Reorganization Following Thermal Stressmentioning

confidence: 99%

“…Coral reefs show significant spatial and temporal heterogeneity in community structure post-disturbance [7][8][9]. While most assessments of the extent of coral bleaching and consequent degradation and succession processes are carried out in shallow depths (2-10 m) [7,[10][11][12][13], the response of shallow benthic communities to thermal stress over depth ranges extending to 30 m is poorly described [9,14]. As light, temperature [15] and waves decrease with increasing depth, and the availability of organic resources increases at depths [16,17], it is expected that the response of benthic communities to thermal stress will dampen [18].…”

mentioning

confidence: 99%

Depth variation in benthic community response to repeated marine heatwaves on remote Central Indian Ocean reefs

Sannassy Pilly,

Roche,

Richardson

et al. 2024

R. Soc. Open Sci.

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Coral reefs are increasingly impacted by climate-induced warming events. However, there is limited empirical evidence on the variation in the response of shallow coral reef communities to thermal stress across depths. Here, we assess depth-dependent changes in coral reef benthic communities following successive marine heatwaves from 2015 to 2017 across a 5–25 m depth gradient in the remote Chagos Archipelago, Central Indian Ocean. Our analyses show an overall decline in hard and soft coral cover and an increase in crustose coralline algae, sponge and reef pavement following successive marine heatwaves on the remote reef system. Our findings indicate that the changes in benthic communities in response to elevated seawater temperatures varied across depths. We found greater changes in benthic group cover at shallow depths (5–15 m) compared with deeper zones (15–25 m). The loss of hard coral cover was better predicted by initial thermal stress, while the loss of soft coral was associated with repeated thermal stress following successive warming events. Our study shows that benthic communities extending to 25 m depth were impacted by successive marine heatwaves, supporting concerns about the resilience of shallow coral reef communities to increasingly severe climate-driven warming events.

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“…According to Rani et al (2020) under the same conditions of water quality and environment, the number of individual herbivorous fish may also be the same. Elma et al (2023) research shows that the better the brightness, the more abundance of herbivorous reef fish will be. This is due to the influence of topography and depth which provides healthier ecological conditions.…”

Section: Herbivorous Fish Community Structurementioning

confidence: 99%

“…The grazing activity of herbivorous fish is very important in creating open spaces for corals to settle and increasing coral recruitment by reducing algal cover (Bridge et al, 2013;Davies et al, 2013;Frimanozi et al, 2019). In addition, Elma et al, (2023) stated that the composition of herbivorous reef fish can control the presence of algae distribution in coral reef resilience.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of Herbivorous Fish and Its Role in Controlling Algal Coverage in Coral Reef Restoration Area Affected by the Bleaching Phenomenon in 2016

Rani

Wang

Faizal

2023

jppipa, pendidikan ipa, fisika, biologi, kimia

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Coral reefs in the waters of Liukangloe Island were reported to have experienced a bleaching phenomenon in May 2016 and rehabilitation efforts were carried out in 2019. This study aimed to analyze the structure of the herbivorous fish community and its role in controlling algal cover in the rehabilitation area. Observations of herbivorous fish were carried out using visual census techniques on an area of 4m2 and observation of algae in 0.5x0.5 m2 transects on several coral attachment media from dead coral substrates. The results showed that the proportion of herbivorous fish species in the transplant area ranged from 15.81-58.67% and the proportion of individuals ranged from 12.51-34.62%. The dynamics of the number of species and abundance of herbivorous reef fish did not show significant differences between substrates and had the same dynamic pattern in all substrates uses but varied temporally according to the time of observation. The exception is the rubble area which continues to increase until the end of the observation. A high number of herbivorous fish species richness was observed in the branching and natural coral substrates and low in the rubble substrate. The abundance of herbivorous reef fish showed a significant and negative relationship to algal cover and confirmed that the presence of herbivorous reef fish could control or reduce the value of algal cover.

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Post-bleaching alterations in coral reef communities

Cited by 5 publications

References 90 publications

Dynamic of coral recruits in the Karimunjawa National Park, Central Java, Indonesia

Dynamic of coral recruits in the Karimunjawa National Park, Central Java, Indonesia

Depth variation in benthic community response to repeated marine heatwaves on remote Central Indian Ocean reefs

Dynamics of Herbivorous Fish and Its Role in Controlling Algal Coverage in Coral Reef Restoration Area Affected by the Bleaching Phenomenon in 2016

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