Change Detection of Coral Reef Habitat Using Landsat Imagery in Morotai Island North Maluku Province

Wahiddin, Nurhalis; Siregar, Vincentius P.; Nababan, Bisman; Jaya, Indra; Wouthuyzen, Sam

doi:10.28930/jitkt.v6i2.9026

Cited by 3 publications

(3 citation statements)

References 18 publications

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“…The presence of H. halmahera indicates that the coastal area of Morotai Island has the main ecosystem, namely coral reefs, to support the life of these biotas. The distribution of coral communities was found in Morotai waters [35], [36], although the data showed low coral cover. Coral cover conditions were low (30%) until moderate (50%) [37]- [40].…”

Section: Data Samplesmentioning

confidence: 88%

Morphometrics and long-weight relationship Halmahera walking shark (Hemiscyllium halmahera, Allen, 2013) population in Morotai Island Sea, North Maluku, Indonesia

Akbar,

Bengen,

Nurjaya

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Morotai Island is under the influence of plates, Indonesian Throughflow, Halmahera Eddy, New Guinea Coastal Undercurrent (NGCUC) and is located in the coral reef triangle. Halmahera walking shark (Hemiscyllium halmahera) was found in the Morotai Island Sea. The aim was to study the morphometric and length-weight relationship of H. halmahera on Morotai Island. Sample collection of H. halmahera in South Morotai, North Morotai and South West Morotai. H. halmahera samples were taken using scuba diving at a depth of 3-10 meters. The morphometric measurements were 11 variables TL (total length)- LTL (lower tail length). The diversity of morphometric characteristics found was analyzed using the Principal Component Analysis (PCA) method. Analysis length-weight relationship using linear regression equation. The results found 30 individuals (South Morotai = 8, North Morotai = 9, South West Morotai = 8, and East Morotai = 5) and the frequency of sex presence individuals (male = 16 and female = 14). Morphometric parameters found variation in each individual. PCA analysis found that the distribution of morphometric characteristics had body size variation. Dendogram is divided into Cluster I (North Morotai dan South West Morotai) dan Cluster II (South Morotai dan East Morotai). The length-weight relationship found negative allometric growth.

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Section: Data Samplesmentioning

confidence: 88%

Morphometrics and long-weight relationship Halmahera walking shark (Hemiscyllium halmahera, Allen, 2013) population in Morotai Island Sea, North Maluku, Indonesia

Akbar,

Bengen,

Nurjaya

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…(a) (b) The habitat of coral reefs on populated islands is Morotai Island, North Maluku Province (Wahiddin et al, 2014). The condition of coral reefs in 1996-2013 underwent significant changes.…”

Section: Time Series Imagery Of Coral Reefs In Inhabited Islandsmentioning

confidence: 99%

Coral Reefs on Inhabited and Uninhabited Small Islands, Spermonde Archipelago, Indonesia

Nurdin

Amri

Rasyid

et al. 2021

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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Abstract. The small islands in Indonesia is providing important ecosystem services. It is important to identify damages of a coral reef ecosystem and whether natural factors or anthropogenic factors are the main causes. Landsat images obtained with different sensors were analyzed for mapping coral reef on inhabited and uninhabited small islands, Spermonde archipelago, Indonesia. Overall accuracies of three habitats classification were 89.2% and 85.6%, respectively. They are live coral, dead coral and non-coral. Ground truth surveys were selected by using the unsupervised classification method The live coral in inhabited islands was slightly greater than in uninhabited. An increasing area of live coral was about 5.3 ha of the total area in 1990 per year while a decreasing of dead coral was 3.5 ha per year in inhabited islands. In uninhabited island, a decreasing speed of live coral habitat area was about 0.6 per year. During 29 years, a significant increase in the dead coral and decrease in live corals. It has been identified that the significant controlling factor for the disturbances in reef ecosystem is derived from natural and anthropogenic.

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“…Koreksi kolom air menggunakan komposisi band sinar tampak dengan cara mengekstrak nilai piksel citra pada tipe substrat yang sama. Dalam hal ini training area diambil pada tipe substrat pasir dari kedalaman berbeda (Green et al, 2000;Wahidin, Siregar, Nababan, Jaya, & Wouthuyzen, 2014…”

Section: Koreksi Kolom Airunclassified

Evaluasi Tingkat Akurasi Pemetaan Habitat Bentik Perairan Dangkal Pada Perbedaan Jumlah Kelas Mengunakan Citra Satelit Resolusi Tinggi

Sugara¹,

Siregar

Agus

2020

MIG

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Pulau Sebaru Besar merupakan salah satu pulau yang terdapat di bagian utara Kepulauan Seribu yang memliki keanekaragaman habitat perairan laut dangkal. Citra resolusi tinggi diintegrasikan dengan data observasi lapang dapat menjadi alternatif sumber informasi terkait habitat bentik perairan laut dangkal. Penelitian ini bertujuan untuk melakukan evaluasi akurasi hasil klasifikasi habitat bentik perairan dangkal di Pulau Sebaru Besar Kepulauan Seribu menggunakan citra WorldView-2 dengan penerapan 9 dan 7 kelas serta melakukan uji akurasi hasil klasifikasi. Data citra WorldView-2 yang digunakan merupakan salah satu citra resolusi tinggi dengan resolusi spasial 1,84 x 1,84 meter 2 yang diakuisisi pada tanggal 7 Mei 2018. Survei lapang habitat bentik perairan dangkal dilakukan pada tanggal 10-12 Mei 2018 dan 09-10 Desember 2018 dengan teknik foto kuadrat yang menghasilkan sampelsampel sebanyak 159 titik. Persentase tutupan habitat setiap foto kuadrat dianalisis dengan perangkat lunak Coral Point Count with Excel extensions (CPCe). Berdasarkan hasil penelitian akurasi klasifikasi pemetaan habitat bentik perairan dangkal untuk 9 dan 7 kelas dihasilkan akurasi sebesar 63,2% dan 67,5% dengan algoritma Maximum Likelihood Classification (MLC). Habitat bentik perairan dangkal dapat dipetakan dengan baik, sehingga bisa menjadi masukan basis data informasi untuk pengelola Taman Nasional Kepulauan Seribu (TNKpS) kaitannya dalam usaha monitoring habitat bentik terkhusus terumbu karang dan upaya konservasi habitat perairan laut dangkal.

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Change Detection of Coral Reef Habitat Using Landsat Imagery in Morotai Island North Maluku Province

Cited by 3 publications

References 18 publications

Morphometrics and long-weight relationship Halmahera walking shark (Hemiscyllium halmahera, Allen, 2013) population in Morotai Island Sea, North Maluku, Indonesia

Morphometrics and long-weight relationship Halmahera walking shark (Hemiscyllium halmahera, Allen, 2013) population in Morotai Island Sea, North Maluku, Indonesia

Coral Reefs on Inhabited and Uninhabited Small Islands, Spermonde Archipelago, Indonesia

Evaluasi Tingkat Akurasi Pemetaan Habitat Bentik Perairan Dangkal Pada Perbedaan Jumlah Kelas Mengunakan Citra Satelit Resolusi Tinggi

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