Environmental and biological drivers of white plague disease on shallow and mesophotic coral reefs

This research was conducted to determine the coral health condition of genus Porites at Jemeluk beach and Penuktukan beach with the different of reef geomorphology. Coral reef data was collected for two days in Jemeluk beach (reef flats) in March 2017 and in Penuktukan beach (reef slope) in April 2017. Each observation location consisted of 3 stations parallel to the coastline. Observation of coral health data using belt transect method size 2 x 25 m with width of 1 meter each to left and right side. Photo documentation was performed on coral reefs of Porites and subsequently identified the types of diseases and forms of health problems using Coral Disease Handbook, Guidelines for Assessment, Monitoring and Management. The types of coral diseases found in both beaches are ulcerative white spot and white plague. The number of dominant colonies that infected with the disease was found on Jemeluk beach which has coastal morphology of coral reefs. The coral health conditions of the genus Porites found on Jemeluk and Penuktukan beaches are in an unhealthy condition. Compromised health is dominant in Jemeluk beach, this is estimated to be caused by the presence of river flow at observation sites which is relatively high. In addition, the coral reef morphology in Jemeluk beach is reef flat causing the reefs in this area to be more susceptible to damage.

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Coral Reefs and Chemotherapy

PsycEXTRA Dataset ◽

10.1037/e304572005-003 ◽

2004 ◽

Keyword(s):

Coral Reefs

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Greedy rats take a bite out of coral reefs

Nature ◽

10.1038/d41586-018-05702-z ◽

2018 ◽

Author(s):

Ellie Mackay

Keyword(s):

Coral Reefs

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Global warming threatens coral reefs

Nature ◽

10.1038/news040216-3 ◽

2004 ◽

Author(s):

Helen Pearson

Keyword(s):

Global Warming ◽

Coral Reefs

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Allelopathy in the tropical alga Lobophora variegata: An indirect cause of phase shifts on mesophotic coral reefs?

Planta Medica ◽

10.1055/s-0034-1382748 ◽

2014 ◽

Vol 80 (10) ◽

Author(s):

M Slattery ◽

MP Lesser

Keyword(s):

Coral Reefs ◽

Phase Shifts ◽

Lobophora Variegata

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Pemetaan Pulau Kecil Gelasa Kabupaten Bangka Tengah

Journal of Tropical Marine Science ◽

10.33019/jour.trop.mar.sci.v2i1.909 ◽

2019 ◽

Vol 2 (1) ◽

pp. 11-14

Author(s):

Wahyu Adi

Keyword(s):

Coral Reefs ◽

Vegetation Index ◽

Normalized Difference Vegetation Index ◽

Image Interpretation ◽

Vegetation Coverage ◽

Small Island ◽

Shallow Waters ◽

Small Islands ◽

Seagrass Beds ◽

Cover Density

Pulau Kecil Gelasa merupakan daerah yang belum banyak diteliti. Pemetaan ekosistem di pulau kecil dilakukan dengan bantuan citra Advanced Land Observing Satellite (ALOS). Penelitian terdahulu diketahui bahwa ALOS memiliki kemampuan memetakan terumbu karang dan padang lamun di perairan dangkal serta mampu memetakan kerapatan penutupan vegetasi. Metode interpretasi citra menggunakan alogaritma indeks vegetasi pada citra ALOS yaitu NDVI (Normalized Difference Vegetation Index), serta pendekatan Lyzengga untuk mengkoreksi kolom perairan. Hasil penelitian didapatkan luasan Padang Lamun di perairan dangkal 41,99 Ha, luasan Terumbu Karang 125,57 Ha. Hasil NDVI di daratan/ pulau kecil Gelasa untuk Vegetasi Rapat seluas 47,62 Ha; luasan penutupan Vegetasi Sedang 105,86 Ha; dan penutupan Vegetasi Jarang adalah 34,24 Ha. Small Island Gelasa rarely studied. Mapping ecosystems on small islands with the image of Advanced Land Observing Satellite (ALOS). Previous research has found that ALOS has the ability to map coral reefs and seagrass beds in shallow water, and is able to map vegetation cover density. The method of image interpretation uses the vegetation index algorithm in the ALOS image, NDVI (Normalized Difference Vegetation Index), and the Lyzengga approach to correct the water column. The results of the study were obtained in the area of Seagrass Padang in the shallow waters of 41.99 ha, the area of coral reefs was 125.57 ha. NDVI results on land / small islands Gelasa for dense vegetation of 47.62 ha; area of Medium Vegetation coverage 105.86 Ha; and the coverage of Rare Vegetation is 34.24 Ha.

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