scholarly journals Coral Reefs: Beyond Mortality?

2000 ◽  
Vol 1 ◽  
pp. 7-9 ◽  
Author(s):  
Charles Sheppard
Keyword(s):  
Coral Reef ◽  
Soft Coral ◽  
Arabian Gulf ◽  
Personal Communication ◽  
Coral Mortality ◽  
Living Coral ◽  
Whole Number ◽  
Reef Communities ◽  
The Indian Ocean ◽  
Chagos Archipelago

The scale of the collapse of coral reef communities in 1998 following a warming episode (Wilkinson, 2000) was unprecedented, and took many people by surprise. The Indian Ocean was the worst affected with a coral mortality over 75% in many areas such as the Chagos Archipelago (Sheppard, 1999), Seychelles (Spencer et al., 2000) and Maldives (McClanahan, 2000). Several other locations were affected at least as much, with mortality reaching 100% (to the nearest whole number); this is being compiled by various authors (e.g., CORDIO, in press). For example, in the Arabian Gulf, coral mortality is almost total across many large areas of shallow water (Sheppard, unpublished; D. George and D. John, personal communication). The mortality is patchy of course, depending on currents, location inside or outside lagoons, etc., but it is now possible to swim for over 200 m and see not one remaining living coral or soft coral on some previously rich reefs.

scholarly journals Differential impacts of 2016 coral bleaching on coral reef benthic communities at Sekotong Bay, Lombok Barat, Indonesia

2019 ◽  
Vol 20 (2) ◽  
pp. 570-575 ◽  
Author(s):  
IMAM BACHTIAR ◽  
TRI ARYONO HADI
Keyword(s):  
Coral Reef ◽  
Coral Bleaching ◽  
Soft Coral ◽  
Coral Cover ◽  
Benthic Communities ◽  
Coral Community ◽  
Coral Mortality ◽  
Reef Recovery ◽  
The Individual ◽  
Cascade Effects

Abstract. Bachtiar I, Hadi TA. 2019. Differential impacts of 2016 coral bleaching on coral reef benthic communities at Sekotong Bay, Lombok Barat, Indonesia. Biodiversitas 20: 570-575. Coral bleaching has been a major causal factor of coral mortality worldwide in the last two decades and it is therefore threaten food security. Understanding post-bleaching recovery is therefore very crucial to formulate strategy in promoting natural coral reef recovery. The present study documented coral reef communities both in pre- and post-bleaching event in early 2016. The results show that coral bleaching variably reduced coral and soft-coral covers. Sponge and other fauna cover considerably fluctuated. Since the individual number of soft-coral, sponge and other fauna were small, there is likely no big impact of coral bleaching. Among 12 study sites, 11 sites showed significant reduction of coral cover but one site showed only little fluctuation. Overall mean reduction of coral cover was about 18%. Consequently, algal cover increased by about 24%. The present study revealed differential coral bleaching impact between outer- and inner- reefs. At outer reefs, coral community suffered more severe mass coral mortality than those at inner reefs. This disparity is likely owing to initial coral cover and species composition of the coral communities. In the second year, there is still no visible coral recruitment from larvae. Cascade effects of land-clearing and overfishing due to increasing tourism development is very likely to be additional major stress that pause post-bleaching coral reef recovery at Sekotong Bay, Lombok Island, Indonesia.

scholarly journals Tutupan Terumbu Karang di Pulau Lirang Kabupaten Maluku Barat Daya

2019 ◽  
Vol 8 (3) ◽  
pp. 246-252
Author(s):  
Kurnia Adi Nusaputro ◽  
Sri Redjeki ◽  
Endang Sri Susilo
Keyword(s):  
Climate Change ◽  
Coral Reef ◽  
Life Form ◽  
Soft Coral ◽  
Coral Cover ◽  
Live Coral ◽  
Soft Corals ◽  
Coral Mortality ◽  
Physical Damage ◽  
Accelerated Growth

Penelitian mengenai persentase tutupan substrat pada perairan terumbu karang ini dilakukan di Pulau Lirang Kabupaten Maluku Barat Daya. Penelitian yang dilakukan di perairan Pulau Lirang bertujuan untuk mengetahui persentase tutupan substrat di perairan tersebut. Pengumpulan data dilakukan bulan April 2016 pada enam lokasi dengan transek sepanjang 100 meter. Data dihimpun dengan menggunakan metode Point Intersept Transect (PIT) menggunakan peralatan SCUBA. Hasil penelitian menunjukkan rerata tutupan karang hidup di Pulau Lirang, Maluku Barat Daya adalah 33,75%, dengan tutupan tertinggi pada stasiun VI (54%). Kematian karang yang mencapai 48% di stasiun V diduga disebabkan oleh persaingan dengan soft coral atau biota bentik lainnya, arus dan sedimentasi. Dominasi karang Acropora, foliose dan massive di perairan Pulau Lirang dapat diartikan masih terjadinya kesetimbangan ekosistem terumbu karang di perairan tersebut, dimana Acropora sebagai indikator percepatan pertumbuhan dan pemulihan, karang foliose menandakan ketahanan akan kerusakan fisik seperti arus dan gelombang dan karang massive sebagai indikator ketahanan perubahan iklim global. Research on the percentage of substrate cover on coral reef waters was conducted in Lirang island, Southwest Maluku Regency. The aim of this research was to determine the percentage of substrate cover in the waters. Data collection was conducted in April 2016, in six locations with 100 m long transect for each location. The data was collected using Point Intercept Transect (PIT) method using SCUBA equipment. The result showed that average live coral cover in Lirang Island waters, Southwest Maluku is 33,75%, with the highest coral cover at Station VI (54%). The exsisting coral mortality at Station V (48%) was assumed because of competition with soft corals or other benthic biota, and sedimentation. The domination of the coral life form Acropora, Foliose, and Massive in Lirang island waters indicated that the ecosystem balance in these area was still maintained. The existence of Acropora life form is an indicator of accelerated growth and recovery, while foliose life form is an indicator of durability and physical damage from current and wave. Lastly, massive coral life form is an indicator of resistance to climate change.

Dispute Concerning Delimitation of the Maritime Boundary between Mauritius and Maldives in the Indian Ocean, Preliminary Objections (ITLOS)

2021 ◽  
pp. 1-69
Author(s):  
Thomas Burri ◽  
Jamie Trinidad
Keyword(s):  
Indian Ocean ◽  
Law Of The Sea ◽  
International Tribunal ◽  
Maritime Boundary ◽  
The Indian Ocean ◽  
The Law ◽  
Arbitral Proceedings ◽  
Chagos Archipelago

On January 28, 2021, a Special Chamber of the International Tribunal for the Law of the Sea (ITLOS) delivered a judgment in which it rejected preliminary objections raised by the Maldives in arbitral proceedings instituted by Mauritius, concerning the delimitation of the maritime boundary north of the Chagos Archipelago in the Indian Ocean.

scholarly journals On the small‐scale fractal geometrical structure of a living coral reef barrier

2020 ◽  
Vol 45 (12) ◽  
pp. 3042-3054 ◽  
Author(s):  
Damien Sous ◽  
Frédéric Bouchette ◽  
Erik Doerflinger ◽  
Samuel Meulé ◽  
Raphael Certain ◽  
...  
Keyword(s):  
Coral Reef ◽  
Geometrical Structure ◽  
Small Scale ◽  
Living Coral

North-south gradient of incidence, distribution and variations of coral reef communities in the Andaman and Nicobar Islands, India

2017 ◽  
Vol 21 (2) ◽  
pp. 289-301 ◽  
Author(s):  
N. Marimuthu ◽  
J. S. Yogesh Kumar ◽  
C. Raghunathan ◽  
N. V. Vinithkumar ◽  
R. Kirubagaran ◽  
...  
Keyword(s):  
Coral Reef ◽  
Andaman And Nicobar Islands ◽  
Reef Communities ◽  
Nicobar Islands ◽  
Coral Reef Communities

Detection of changes in coral reef communities using Landsat-5 TM and Landsat-7 ETM+ data

2003 ◽  
Vol 29 (2) ◽  
pp. 201-209 ◽  
Author(s):  
David Palandro ◽  
Serge Andréfouët ◽  
Frank E Muller-Karger ◽  
Phillip Dustan ◽  
Chuanmin Hu ◽  
...  
Keyword(s):  
Coral Reef ◽  
Reef Communities ◽  
Landsat 7 ◽  
Landsat 5 Tm ◽  
Coral Reef Communities

scholarly journals Experimental reef communities persist under future ocean acidification and warming

2021 ◽  
Author(s):  
Christopher Jury ◽  
Keisha Bahr ◽  
Evan Barba ◽  
Russell Brainard ◽  
Annick Cros ◽  
...  
Keyword(s):  
Experimental Study ◽  
Species Richness ◽  
Coral Reef ◽  
Coral Reefs ◽  
Ocean Acidification ◽  
Community Composition ◽  
Functional State ◽  
Reef Communities ◽  
Paris Climate Agreement

Abstract Coral reefs are among the most sensitive ecosystems affected by ocean acidification and warming, and are predicted to shift from net accreting calcifier-dominated systems to net eroding algal-dominated systems over the coming decades. Here we present a long-term experimental study examining the responses of entire mesocosm coral reef communities to acidification (-0.2 pH units), warming (+ 2°C), and combined future ocean (-0.2 pH, + 2°C) treatments. We show that under future ocean conditions, net calcification rates declined yet remained positive, corals showed reduced abundance yet were not extirpated, and community composition shifted while species richness was maintained. Our results suggest that under Paris Climate Agreement targets, coral reefs could persist in an altered functional state rather than collapse.

Sign in / Sign up

Export Citation Format

Share Document