Revised ranges of seagrass species in the Myeik Archipelago, Myanmar

Novak, Alyssa B.; Hines, Ellen; Kwan, Donna; Parr, Leslee; Tun, Mya Than; Win, Han; Short, Frederick T.

doi:10.1016/j.aquabot.2009.07.002

Cited by 13 publications

(9 citation statements)

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“…Substrates colonized by seagrass were found in five stations only, with a rather patchy distribution. The bed size occupied by seagrass was generally small as previously observed by Novak et al [20]. Sandy substrates and/or a mixture of coral rubbles and ephytes were finally observed in the remaining 56 shallow water stations.…”

Section: Image Pre-processing and Classification Strategysupporting

confidence: 72%

“…The 30 m pixel resolution sometime does not catch this border, giving rise to errors in the differentiation between corals and deep waters classes. The lower accuracy of seagrass mapping was due to the difficulty of capturing the patchy seagrass beds [20] with the 30 m spatial resolution of OLI data. Moreover, the spectral bands of OLI sensor makes challenging to distinguish different living organisms containing photosynthetic pigments.…”

Section: Classification Accuracymentioning

confidence: 99%

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Mapping Submerged Habitats and Mangroves of Lampi Island Marine National Park (Myanmar) from in Situ and Satellite Observations

Giardino¹,

Bresciani²,

Fava

et al. 2015

Remote Sensing

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Abstract:In this study we produced the first thematic maps of submerged and coastal habitats of Lampi Island (Myanmar) from in situ and satellite data. To focus on key elements of bio-diversity typically existing in tropical islands the detection of corals, seagrass, and mangrove forests was addressed. Satellite data were acquired from Landsat-8; for the purpose of validation Rapid-Eye data were also used. In situ data supporting image processing were collected in a field campaign performed from 28 February to 4 March 2015 at the time of sensors overpasses. A hybrid approach based on bio-optical modeling and supervised classification techniques was applied to atmospherically-corrected Landsat-8 data. Bottom depth estimations, to be used in the classification process of shallow waters, were in good agreement with depth soundings (R 2 = 0.87). Corals were classified with producer and user accuracies of 58% and 77%, while a lower accuracy (producer and user accuracies of 50%) was found for the seagrass due to the patchy distribution of meadows; accuracies more than 88% were obtained for mangrove forests. The classification indicated the presence of 18 mangroves sites with extension larger than 5 km 2 ; for 15 of those the coexistence of corals and seagrass were also found in the fronting bays, suggesting a significant rate of biodiversity for the study area.

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Section: Image Pre-processing and Classification Strategysupporting

confidence: 72%

Section: Classification Accuracymentioning

confidence: 99%

Mapping Submerged Habitats and Mangroves of Lampi Island Marine National Park (Myanmar) from in Situ and Satellite Observations

Giardino¹,

Bresciani²,

Fava

et al. 2015

Remote Sensing

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“…Of the four only one, Lampi I. (East) showed an increase in percentage cover with 64.57% recorded in the current survey compared to 45% in the 2007 surveys [14]. A number of reasons maybe responsible for this increase such as a decrease in shrimp and fish catch in the area leading trawlers to search elsewhere for catch or from the increase in presence of Department of Forestry staffs at Marine National Park headquarters in the Lampi Island opposite to the seagrass bed, resulting of greater support by the the NGO community to the MPAs management.…”

Section: Discussionmentioning

confidence: 99%

“…Of the 14 sites surveyed, only four had been previously studied using the same methodology [14], which were located in the Tanintahyi Region, and so comparisions can be made. Of the four only one, Lampi I.…”

Section: Discussionmentioning

confidence: 99%

“…All areas should be granted a certain level of protection although priotiry firstly needs to be given to Ma Gyi Gyaing in Rakhine given its species diversity, being the only site to conatin the Vulnerable listed Halophila beccarii species and beacsue of its high percent cover. Such an area should be gazzetted as a Marine Protected Area ( [10][11][12][13][14][15]. Their importance to Myanmar fishers is well known with local people calling seagrasses Leik-Sar-Phat-Myet, meaning the food of marine turtles.…”

mentioning

confidence: 99%

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Biodiversity, Distribution and Coverage of Seagrasses in the Myeik Archipelago and Rakhine Coastal Areas, in Myanmar

Soe-HtunU¹,

Maung²,

Mon³

et al. 2017

JAMB

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Seagrasses provide ecological services to marine organisms that contribute towards food security and economic benifits to local communities living around their meadows. Surveys on seagrass taxonomy, distribution and extent were carried out in Myanmar in 14 sites within the Myeik Archipelago and along the Rakhine coast to assess the status of these important habitats. This study follows the guidelines of taxonomic monographs and the SeagrassNet manual to survey species diversity, percent cover and extent. A total of 11 species of seagrasses were recorded, including Syringodium isoetifolium, Cymodocea rotundata, C. serrulata, Halodule uninervis, H. pinifolia, Enhalus acoroides, Thalassia hemprichii, Halophila beccarii, H. decipiens, H. ovalis and H. major. Of these, Halophila pinifolia was the most commonly observed species and the only one to be distributed across all 14 study sites. In contrast, Halophila beccarii was only recorded at Ma Gyi along the Rakhine coast. Other uniquie species distributions include Halophila major which was solely found along the Rakhine coast and H. ovalis which was exclusively encountered along the Myeik Archipelago. The habitat types of seagrasses between the two Coastal Regions were also found to be differred with seagrass meadows in Taninthayi most commonly observed in coastal intertidal habitat whereas those in Rakhine were recorded in the fringing reef and deep subtidal habitat. In terms of species diversity among the 14 study sites, Ma Gyi Gyaing and Pho Htaung Gyaing showed the highest in Rakhine with 9 species each while Zar Det Ngye I (East) and Pa Law Kar Kyan I in Taninthayi contained 7 species each. Highest percentage cover of seagrass meadows was observed at Maung Shwe Lay Gyaing, in Rakhine with 67.00% and the highest coverage in Taninthayi at Lampi I (East) with 64.57%. Given the environmental services provided by seagrasses their protection within Myanmar is critical. All areas should be granted a certain level of protection although priotiry firstly needs to be given to Ma Gyi Gyaing in Rakhine given its species diversity, being the only site to conatin the Vulnerable listed Halophila beccarii species and beacsue of its high percent cover. Such an area should be gazzetted as a Marine Protected Area ( [10][11][12][13][14][15]. Their importance to Myanmar fishers is well known with local people calling seagrasses Leik-Sar-Phat-Myet, meaning the food of marine turtles. In addition, the seagrass meadows are known to serve as important feeding grounds for the sea cow, Dugong dugon which is recognized as endangered species under the IUCN Red list. Given their importance, both ecologically and economically, and the global decline in segarss beds, the protection of seagrasses within Myanmar is seen as paramount. The objective of this study was to know the updated information on the current status of biodiversity, distribution and coverage of seagrasses at select sites within the Taninthayi and the Rakhine Coastal Regions of Myanmar. This information will be used to...

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Threats to the Blue Carbon Ecosystems Adjoining the Indian Ocean

Chanda

2022

Blue Carbon Dynamics of the Indian Ocean

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Revised ranges of seagrass species in the Myeik Archipelago, Myanmar

Cited by 13 publications

References 1 publication

Mapping Submerged Habitats and Mangroves of Lampi Island Marine National Park (Myanmar) from in Situ and Satellite Observations

Mapping Submerged Habitats and Mangroves of Lampi Island Marine National Park (Myanmar) from in Situ and Satellite Observations

Biodiversity, Distribution and Coverage of Seagrasses in the Myeik Archipelago and Rakhine Coastal Areas, in Myanmar

Threats to the Blue Carbon Ecosystems Adjoining the Indian Ocean

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