Coral reef recovery status in south Andaman Islands after the bleaching event 2010

Marimuthu, N.; Wilson, J. Jerald; Vinithkumar, Nambali Valsalan; Kirubagaran, R.

doi:10.1007/s11802-013-2014-2

Cited by 28 publications

(8 citation statements)

References 6 publications

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“…However, upliftment could not be attributed as the sole cause of it since few cases of bleaching were also observed in sites where uplifts were minimal. This was also in lieu with the observations of global scientific community, specifically for the year 1997-1998, regarding the increase of sea surface temperature (SST) and salinity in tropics (Marimuthu et al, 2013). Apart from the tectonic and climatic factors, anthropogenic activities were also found to be detrimental in degrading the corals.…”

Section: Discussionsupporting

confidence: 69%

Geospatial analysis of the effects of tsunami on coral and mangrove ecosystems of Mayabunder in Andaman Islands, India

et al. 2019

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Majumdar et al.: Effects of tsunami on coral reef and mangrove 1 Geospatial analysis of the effects of tsunami on coral and mangrove ecosystems of Mayabunder in Andaman Islands, India Mangroves and coral reefs are among the major ecosystems of tropical and subtropical coastlines. The Andaman group of islands, situated at the juncture of Bay of Bengal and Indian Ocean, are one of the richest coastal ecosystems of India in terms of biodiversity. Since the tsunami waves of 2004 affected this region severely, the outer fringes as well as inland areas of these islands faced extensive ecological degradation. Mayabunder is one such place of this region, where corals and mangroves had experienced both natural and anthropogenic threat. Considering the notable vulnerability of this coastal environment, the present study aimed to assess the transformations of the coral and mangrove ecosystems at Mayabunder both in pre-tsunami and post-tsunami periods till the present year using multi-temporal satellite imageries and geospatial techniques. Results showed that the areal coverage of healthy living coral reefs was reduced by 466.56 ha (10.42 %) from 1990 to 2000. Afterwards, the coupled ecosystem had experienced serious degradation again during the 2000−2010 phase. The areal coverage of dense mangroves decreased by 47.37%, whereas the area of dead coral covers showed a significant rise of 55.52%. However, partial restoration of both mangroves as well as healthy corals had also been observed here in recent years. It was raised from the extensive field visits and feedbacks from local inhabitants that this restoration initiative could become more effective if a participatory mode of management is adopted.

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Section: Discussionsupporting

confidence: 69%

Geospatial analysis of the effects of tsunami on coral and mangrove ecosystems of Mayabunder in Andaman Islands, India

et al. 2019

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“…The purpose of this study was to assess the effects of a natural bleaching event on genes involved in the innate immune system of the Caribbean coral O. faveolata. In 2010, corals and coral reefs around the world experienced thermal stress that resulted in widespread coral bleaching [39][40][41]. In the Caribbean, reefs off the Puerto Rican coastline were no exception.…”

Section: Introductionmentioning

confidence: 99%

Whole transcriptome analysis reveals changes in expression of immune-related genes during and after bleaching in a reef-building coral

et al. 2015

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Climate change is negatively affecting the stability of natural ecosystems, especially coral reefs. The dissociation of the symbiosis between reef-building corals and their algal symbiont, or coral bleaching, has been linked to increased sea surface temperatures. Coral bleaching has significant impacts on corals, including an increase in disease outbreaks that can permanently change the entire reef ecosystem. Yet, little is known about the impacts of coral bleaching on the coral immune system. In this study, whole transcriptome analysis of the coral holobiont and each of the associate components (i.e. coral host, algal symbiont and other associated microorganisms) was used to determine changes in gene expression in corals affected by a natural bleaching event as well as during the recovery phase. The main findings include evidence that the coral holobiont and the coral host have different responses to bleaching, and the host immune system appears suppressed even a year after a bleaching event. These results support the hypothesis that coral bleaching changes the expression of innate immune genes of corals, and these effects can last even after recovery of symbiont populations. Research on the role of immunity on coral's resistance to stressors can help make informed predictions on the future of corals and coral reefs.

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“…Examples of coral reef loss and recovery studies include Acropora palmata and Acropora cervicornis in the Caribbean [38]; Acropora aspera, Acropora cerealis, Acropora humilis, and Montipora spp. in the South Andaman Islands [39]; Acropora spp. in the Maldives [40]; Acropora spp.…”

Section: Coral Cover Changes At Two Bays During 2018-2021mentioning

confidence: 99%

Marine Resource Recovery Following the COVID-19 Event in Southern Thailand

Somchuea

Jaroensutasinee

2022

Civ Eng J

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This study investigated coral and reef fish recovery following the COVID-19 event between low and high environmental disturbance reefs at Racha Yai Island, Southern Thailand. Three and four 50-m permanent line transects were set at low and high environmental reefs to collect the percent of live coral cover, fish diversity and abundance, and fish trophic-functional groups based on diet and habitat use. Our results showed a significant rise in the percentage of live coral cover, the number of individual fish, the number of fish species, and species richness at both bays following the COVID-19 lockdown due to a crucial reduction in human activities on the reef. In addition, there were increases in the number of corallivore fishes belonging to Chaetodontidae and Pomacentridae families and a reduction of omnivorous fish at the fish-feeding tourist attraction reefs due during the COVID-19 lockdown due to reducing fish-feeding tourism. This indicated that restricted human activities and reduced anthropogenic stress on a coral reef may have substantial short-term impacts on reef fish diversity. Our insights could help designate guidelines to manage tourist impacts on coral reefs and aid in their prolonged persistence. Doi: 10.28991/CEJ-2022-08-11-011 Full Text: PDF

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Coral reef recovery status in south Andaman Islands after the bleaching event 2010

Cited by 28 publications

References 6 publications

Geospatial analysis of the effects of tsunami on coral and mangrove ecosystems of Mayabunder in Andaman Islands, India

Geospatial analysis of the effects of tsunami on coral and mangrove ecosystems of Mayabunder in Andaman Islands, India

Whole transcriptome analysis reveals changes in expression of immune-related genes during and after bleaching in a reef-building coral

Marine Resource Recovery Following the COVID-19 Event in Southern Thailand

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