Syringodium Isoetifolium Research Articles

Composition and Distribution Patterns of Seagrass in the Gulf of Tomini

This study aims to determine the composition and distribution patterns of seagrass species in the Gulf of Tomini, Tabulo Selatan Village and Keramat Village, Mananggu District, Boalemo Regency. This research was conducted for 3 months starting from June 2017 until August 2017. The method used was the line transect method at 2 village locations, each with 3 stations. The results showed that the composition of seagrass species at the study site consisted of seagrass Cymodocea serrulata, Cymodocea rotundata, Enhalus acoroides, Syringodium isoetifolium, Thalassia hemprichii and Halophila ovalis. Seagrass distribution patterns are included in the random and cluster categories.

Determining seagrassess community structure using the Braun – Blanquet technique in the intertidal zones of Islas de Gigantes, Philippines

The seagrass ecosystem which is considered the most productive ecosystem occurs in tropical and subtropical shallow marine waters where it supports diverse flora and fauna. Seagrasses of Islas de Gigantes, Carles, Iloilo were assessed to determine species diversity, abundance, canopy height and percentage cover. Braun – Blanquet technique was used where 3 transects were laid in each station in three barangays of Islas de Gigantes, namely: Barangay Asluman, Barangay Granada and Barangay Gabi. A total of 7 species were found, Thalassia hemprichii, Cymodocea rotundata, Cymodocea serrulata, Halodule pinifolia, Halodule uninervis, Enhalus acoroides and Syringodium isoetifolium. Using the Shannon Diversity Index, the seagrass bed in Gabi was the most diverse with a value of 2.8. Sorenson's coefficient (CC) was used to compute the species similarity attributes indicating that the three communities have many similarities to each other in terms of species diversity and environmental parameters that affect seagrass ecosystems. Syringodium isoetifolium had recorded the highest number of shoots (475 shoots/m2) in Granada. The percentage cover of seagrasses varied across the sampling sites ranging from 55% - 67.50%, with a mean value of 62.50%. However, E. acoroides had the tallest canopy height recorded that ranged from 12.33 – 24.83 cm.

A revision of the typification of some names in the seagrass genera Amphibolis, Cymodocea, Halodule and Syringodium (Cymodoceaceae)

The typification of eight names of species currently included in the family Cymodoceaceae is revised in order to contribute to their nomenclatural stability. The previously designated lectotype of Ruppia antarctica Labill. (≡ Amphibolis antarctica (Labill.) Sond. & Asch.) is cited. Lectotypes are designated here for Zostera nodosa Ucria (≡ Cymodocea nodosa (Ucria) Asch.), Cymodocea rotundata Asch. & Schweinf., Caulinia serrulata R. Br. (≡ Cymodocea serrulata (R. Br.) Asch. & Magnus), Halodule bermudensis Hartog, Diplanthera pinifolia Miki (≡ H. pinifolia (Miki) Hartog) and Cymodocea isoetifolia Asch. (≡ Syringodium isoetifolium (Asch.) Dandy). A neotype is designated here for Z. uninervis Forssk. (≡ H. uninervis (Forssk.) Asch.) and an epitype is designated here for Z. nodosa.Citation: Ferrer-Gallego P. P. & Boisset F. 2020: A revision of the typification of some names in the seagrass genera Amphibolis, Cymodocea, Halodule and Syringodium (Cymodoceaceae). – Willdenowia 50: 173–186. doi: https://doi.org/10.3372/wi.50.50203Version of record first published online on 24 April 2020 ahead of inclusion in August 2020 issue.

Inventory Of Seagrass Species On The Melonguane Timur Sub District Beach, Talaud Islands, North Sulawesi

Talaud Islands Regency is one of the administrative regions of North Sulawesi Province which holds high potential regarding biodiversity, especially marine organism. One example is the presence of seagrass species that support biologically and ecologically on the coast, but information regarding the types of seagrass in Talaud has not been fully recorded and is still small. For the Melonguane Timur District waters area was chosen as the initial step to collect data on seagrass types that exist as a biodiversity database in the Talaud Islands district and North Sulawesi Province. The research locations are North Tule and Bowongbaru Villages. The method used is the quadratic transect method and each seagrass in a 1m x 1 m quadratic plot was identified using a seagrass identification book. Based on the results of the study found four species of seagrass scattered on the station area, namely the family hydrocharitaceae and cymodoceae. Including the hydrocharitaceae family are Halophila ovalis and Halodule uninervis. The cymodoceae family is Cymodocea rotundata and Syringodium isoetifolium.

Seagrass bed status: Case study of Panjang Island, Banten Bay

Seagrass community status was measured using a vegetation analysis method at three observation stations in Panjang Island, Banten Bay. Each station was transected by three lines that divided these stations into plots measuring 50 × 50 cm to record the seagrasses species found, number of seagrass shoots, and coverage. In addition, measurements of water quality parameters, including temperature, salinity, pH, brightness, and sediment grains at each station, sediment grain. A Pearson’s correlation test was conducted to determine the correlation between sediment and seagrass density. The measurement of water quality in Panjang Island indicates optimal conditions for seagrass growth, with sediment mixed with clay and sand rubble. The seagrasses found were Enhalus acoroides, Cymodocea serrulata, Syringodium isoetifolium, Halodule uninervis, and Halophila ovalis. The seagrass community in Panjang Island has good coverage (60.16 %) and high density levels (235.03 ind/m2). S. isoetifolium was the dominant seagrass with an importance value (IV) of 119.90. The correlation test showed that mud and clay sediments correlated with the density of E. acoroides.

A Review on Phytochemical and Pharmacological activities of Syringodium isoetifolium

Seagrass are marine plants, grown in saline environments and fully submerged in the sea. They are widely distributed along the tropical and subtropical regions. A seagrass called, Syringodium isoetifolium comes under the family Cymodoceaceae, this grass is otherwise called as noodle grass. Phytochemical compounds such as flavonoids, terpenoids coumarins, xanthoproteins, sugars, carboxylic acids can be extracted by the solvents such as methanol, hexane, and acetone. Syringodium isoetifolium has pharmacological activities such as antioxidant, antihemolytic, antibacterial cytotoxicity, and antifungal activity. During photosynthesis, lacunal gas is discharged from lacunae, and it is composed of oxygen and nitrogen. Pheophytin a compound was isolated from the crude extract of Syringodium isoetifolium by treating it with human pathogens. Binding sites of the pathogen can be found by the Molecular docking study. In this article, we discuss about the phytochemical constituents, pharmacological activities, and morphological characteristics of Syringodium isoetifolium.

Seagrass existence after Sunda Strait tsunami 2018: Evidence in Tanjung Lesung region

The volcanic tsunami occurred at the Sunda strait at the end of 2018. Tanjung Lesung is one of the affected areas, and the seagrass ecosystem allegedly affected too. This research aims to determine seagrass existence in Tanjung Lesung after the tsunami 2018. This research was conducted from June until July 2019 with the same area as the previous study (before tsunami). Observation method using 20 × 0.5 m belt transect sized 50 × 50 cm quadrat. The transect was made perpendicular to the beach line. Seagrass species that were found outside transect also noted. This research found six seagrass species in Tanjung Lesung after tsunami 2018; there were Enhalus acoroides, Cymodocea rotundata, C. serrulata, Syringodium isoetifolium, Halophila ovalis, and Thalassia hemprichii. The most significant impact of tsunami 2018 for seagrass existence sighted in the west part of the cape. Seagrass in the previous observation point has already disappeared and replaced with rock, dead coral, and macro-algae.

STRUKTUR KOMUNITAS LAMUN DI PULAU WANCI, KABUPATEN WAKATOBI, SULAWESI TENGGARA

Lamun merupakan tumbuhan laut yang memiliki peran yang tidak kalah penting dengan ekosistem pesisir lainnya seperti terumbu karang dan mangrove baik dari segi fisik, ekologi, dan ekonomi. Indonesia memiliki 12 jenis lamun dari 58 jenis lamun di dunia. Tidak semua wilayah di Indonesia memiliki jumlah jenis yang sama karena perbedaan kondisi lingkungan atau tekanan antropogenik, sehingga perlu ada kajian keragaman jenis lamun di wilayah perairan Indonesia. Penelitian ini bertujuan untuk mengidentifikasi struktur komunitas lamun dan keterkaitan antara kerapatan lamun dan parameter lingkungan di perairan Pulau Wanci, Sulawesi Tenggara. Stasiun pengamatan berada pada daerah padang lamun yang dibagi menjadi 4 stasiun. Metode sampling yang digunakan mengacu pada McKenzie et al. (2001) menggunakan transek kuadrat 50 cm x 50 cm. Selanjutnya menghitung jumlah tegakan lamun dan mencatat jenis lamun yang ditemukan pada tiap transek kuadrat. Hasil penelitian menunjukkan bahwa ditemukan 7 jenis lamun di perairan Pulau Wanci yaitu Halophila ovalis, Halodule uninervis, Cymodocea rotundata, Thalassia hemprichii, Enhalus acroides, Thalasodendron ciliatum, dan Syringodium isoetifolium dengan kerapatan tertinggi didominasi oleh T. hemprichii, H. uninervis, dan C. rotundata dengan pola sebaran keseluruhan adalah mengelompok. Terdapat keterkaitan antara kerapatan lamun dengan parameter lingkungan, substrat berpasir memiliki korelasi positif yang tinggi terhadap kerapatan lamun sedangkan substrat liat, kecepatan arus, salinitas, dan suhu memiliki korelasi negatif yang rendah sampai tinggi terhadap kerapatan lamun di perairan Pulau Wanci.

Relationship of Distribution Seagrass Species with Dugong (<i>Dugong dugon</i>) Sighting at Liki Island-Papua

Dugong dugon is a herbivorous marine mammal. One of Dugong's favorite foods is seagrass. This study examines the distribution of seagrass species to dugong sighting in Liki Island. The study was conducted in November 2018. Observation of seagrass conditions was carried out using a line transect method and a 50x50 cm transect with a distance interval between 10 m plots. Interviews were also conducted with the community to find out the location of Dugong presence in Liki Island. There are seven species of seagrass found in Liki Island :Enhalus acoroides, Cymodocea rotundata, Thalassia hemprichii, Halophila ovalis, Halodule uninervis, Halodule pnifolia and Syringodium isoetifolium spread over four observation stations. The results showed that Dugong in Liki Island is often found during the eastern season, they often appear in seagrass ecosystem area to do eating activities. Dugong is often found in the eastern part of Liki Island (Station 4) and sometimes also found in the western part of Liki Island (Station 3).Keywords:biodiversity,Dugong dugon, liki, papua, seagrass

PEMETAAN HABITAT PERAIRAN DANGKAL DI KAWASAN PADAT WISATA TANJUNG BENOA BALI MENGGUNAKAN DATA REMOTE SENSING

Tourism is a sector that is prioritized in various countries. Most of the tourist objects are distributed along the coast that intersects directly with those that result in the degradation of the ecosystem inside. The southern region of Bali is one of the regions that has experienced rapid development of tourism activities. The expansion of the tourism area in Tanjung Benoa occurs in coastal areas and directly contacts underwater ecosystems such as seagrass beds and coral reefs, which it have an impact on changes in the area of the ecosystem. Information about the form of distribution of underwater objects can be the first step in making ecological-based tourism policy. Satellite imagery can be used to detect shallow-water habitats. The purpose of this study was to determine the effectiveness of sentinel-2 A images to map shallow water habitat in densely packed tourist areas Tanjung Benoa. The results showed that there were three types of land cover in Tanjung Benoa area, such as seagrass, coral and sand, the accuracy results showed landsat 8 images had higher accuracy than Sentinel-2 A images with total accuracy of 74.83% and kappa accuracy of 46.59%. There are 8 types of seagrasses species in the coastal area of Tanjung Benoa, namely Cymodocea rotundata, Enhalus acoroides, Halodule pinifolia, Halodule uninervis, Halophila ovalis, Thalassia hemprichi Syringodium isoetifolium dan Thalassodendron Ciliatum.
 Keywords: Remote Sensing; Shallow Water Habitat; Tanjung Benoa; Sentinel-2 A; Landsat 8

Community-based monitoring detects catastrophic earthquake and tsunami impacts on seagrass beds in the Solomon Islands.

Tetepare Island in the Solomon Islands is the largest uninhabited island in the South Pacific and supports seagrass beds inside fringing reefs along its coastline. We monitored the diversity and abundance of seagrass species on Tetepare and nearby sparsely-populated Rendova Island over a 12 year period, 4 years before and up to 8 years after a major earthquake and tsunami event in January 2010. Both seagrass cover and diversity declined after the tsunami and had not reached pre-Tsunami levels after 8 years. Seagrass cover declined the fastest at sites on Rendova, closest to the epicentre, declining from 50% to <10% cover within 12 months of the earthquake. At sites within the Tetepare MPA, seagrass cover took longer to decline and dropped from an average of 50% to <10% within 2 years and became dominated by Halophila ovalis. Species richness declined from 9 to 4 species with some species such as Syringodium isoetifolium disappearing from monitoring sites. Community-based monitoring was an effective method of documenting long term changes in seagrass cover and long-term monitoring is required to determine if seagrass beds are permanently altered or return to pre-tsunami conditions.

Biopharmaceutical potential, chemical profile and in silico study of the seagrass– Syringodium isoetifolium (Asch.) Dandy

Syringodium isoetifolium (Asch.) Dandy (Family: Cymodoceaceae) is a seagrass growing in the oceans across the globe except in cold waters. This study investigated into the polyphenolic content, antioxidant [2,2-diphenyl-1-picrylhydrazyl(DPPH), 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid (ABTS), cupric reducing antioxidant capacity (CUPRAC), ferric reducing antioxidant power (FRAP), metal chelating, phosphomolybdenum)]and enzymatic properties [α-amylase, α-glucosidase, tyrosinase, acetylcholinesterase (AChE), butylcholinesterase (BChE)] of S. isoetifolium. Detailed phytochemical profiling was also conducted using Ultra Performance High-Pressure Liquid Chromatography (UHPLC) technique. The methanolic extract was found to possess greater amount of phenolic than flavonoid compounds. Antioxidant results showed that the extract was a better ABTS radical scavenger (9.56±0.40mg TE/g) compared to DPPH (5.39±0.09mg TE/g and exhibited good reducing potential with CUPRAC assay (18.66±0.46mg TE/g). In terms of enzymatic inhibition, strong activities were noted against tyrosinase (25.92±0.11mg KAE/g) in contrast to α-amylase, α-glucosidase and cholinesterase. Phytochemical data revealed the presence of 14 compounds with chicoric acid and caftaric acid among them. Docking the identified compounds, namely, caftaric acid, loliolide and Iso-loliolide at the active site of the tyrosinase enzyme has elucidated the binding affinity of these inhibitors and their interactions with the active site. Based on our findings, S. isoetifolium may be considered as a good natural antioxidant and clinical enzyme inhibitors that can be exploited in pharmaceutical/or cosmeceutical industries.

Estimasi Stok Karbon pada Biomassa Lamun di Pulau Semak Daun, Kepulauan Seribu

&lt;strong&gt;Carbon Stock Estimation in Seagrass Biomass on Semak Daun Island, Thousand Islands&lt;/strong&gt;. Seagrass ecosystem has a vital role in protecting the coastal ecosystem. It can also sequester and store carbon as an organic material (blue carbon) for a long time. However, anthropogenic activities in coastal areas give environmental stress on the seagrass ecosystem. This research was conducted to assess the carbon stock of seagrass biomass in Semak Daun Island in order to evaluate the potential of the seagrass meadows in sequestering carbon. Sampling and observation were held in the seagrass ecosystem to obtain seagrass density, biomass, frequency of occurrence, water quality, and anthropogenic activity. Carbon stock was calculated by the loss of ignition (LOI) method, and combined with density to determine the total carbon stock in the whole area of seagrass meadows. Seagrass species in Semak Daun Island consist of Halophila ovalis, Thalassia hemprichii, Cymodocea rotundata, Syringodium isoetifolium, and Halodule uninervis. The coverage area of seagrass in Semak Daun Island was 9.1 ha with carbon stock value of 1.84 ton C or equivalent to 6.76 ton CO2. Fifty two percent of the carbon stock was originated from the below-ground biomass and 48% from the above-ground biomass.

Morphological plasticity in a Fijian Seagrass: Halophila ovalis subsp. bullosa

Seagrasses are marine flowering plants found along both tropical and temperate coastlines; they possess great ecological importance as nurseries, nutrient sinks, and providers of critical marine habitat. Understanding the distribution and diversity of seagrass habitats is important for their conservation and management, however this is impeded by varying species’ diversity, the extensive distribution of seagrasses and taxonomic uncertainty. In the Fiji Islands, the tropical seagrass Halophila ovalis and its subspecies H. ovalis bullosa are the subject of taxonomic controversy, as a singular morphological characteristic distinguishes the two. This characteristic is the bullated, or blister-like leaves of the latter, compared to the smooth leaves of the former, which in some instances have been observed on the same plant (S.S., pers. obs.). This study examined material from both taxa, along with three other seagrass species (Halodule pinifolia, H. uninervis and Syringodium isoetifolium; total n=95) and used independent morphological and molecular barcoding approaches to assess the conspecificity of the two Halophila taxa. Examination of vegetative and reproductive characters was not able to distinguish between H. ovalis and H. ovalis subsp. bullosa, while phylogenetic reconstructions using ITS2, matK and trnH-psbA barcodes supported their monophyly. We recommend revision and merger of these taxa, while the approach used here is highly useful for taxonomic resolution in other seagrass taxa, for their conservation, restoration and management.

SEAGRASS COMMUNITY STRUCTURE IN TUNDA ISLAND GULF OF BANTEN

Seagrass, as an aquatic angiosperms which are completely adapted to live in the marine environment and shallow water estuaries, is one of the most highly productive marine ecosystems. Under the increasing of global water temperature, coupled with nutrient over-enrichment, the community structure of seagrass may transform as the alteration of ecological functions followed. This condition may also happen in Indonesian coastal waters, including Tunda Island on the Gulf of Banten which received excessive nutrients from the mainland. Study of seagrass community in Tunda Island has been carried out using line transect method perpendicularly to the shore with the 1x1 meter transect plots within 10 meters interval. Community structure as density, coverage, diversity index and dominance index of seagrass had been observed in 4 stations. The results showed that there were five species of seagrass were recorded in this area, namely Cymodocea rotundata, Syringodium isoetifolium, Enhalus acoroides, Halophila ovalis and Thalassia hemprichii. The distributions and species composition were varied and generally dominated by Thalassia hemprichii with 48.25 shoots m*2 density. The diversity index obtained from the research was 0.84 as well as the dominance index was 0.55. It showed that the diversity of seagrass at Tunda Island is low and no high dominance among species. The status of seagrass meadows in Tunda Island was classified as poor since the total coverage was only 22 %. Further observation of correlation among other organisms such as macroalgae and grazers in the ecosystems will be necessary to investigate the ecological alteration.

Carbon storage in seagrass meadow of Teluk Bakau – Bintan Island

Seagrass has the ability to store carbon through photosynthesis. The ability is influenced by environmental factors. This study was aimed to examine the diversity of seagrass and investigate the carbon storage in seagrass’ biomass in two stations at Teluk Bakau Village, Bintan Island. This research was conducted at two stations including Beralas Pasir Island (small island) and Teluk Bakau Village Beach (mainland). Measure of seagrass biomass with dried seagrass sample was carried out at 60°C temperature. The analysis of carbon content was carried out on the biomass of the four dominant seagrass species found in the Teluk Bakau Village namely Cymodocea rotundata, Enhalus acoroides, Syringodium isoetifolium, Thalassia hemprichii. The results show that the carbon storage on seagrass has a correlation with seagrass biomass. Enhalus acoroides has the highest carbon content compared to the other three seagrass species. In general, seagrass located in Teluk Bakau Village Beach have higher biomass than seagrass located in Beralas Pasir Island, and it means that they have high carbon storage. This is expected to occur considering that the area of Teluk Bakau Village Beach is close to the mainland, where there is a high nutrient input support for the growth of seagrass biomass.

Habitat function of seagrass ecosystem for megabentos diversity in Teluk Bakau, North Bintan, Indonesia

This paper examines about seagrass ecosystems as a habitat function of variety type of association biota. There are a lot of research about seagrass ecosystem in study area, including the seagrass itself, associated organism and also seagrass transplantation activities that have been carried out. Moreover, there have been research on anthropogenic disturbances towards the presence of seagrass ecosystems in Teluk Bakau Area. This is occur because the seagrass ecosystem in Teluk Bakau has habitat availability in accordance with various associated biota. The association biotas which found in seagrass habitats are generally from Megabenthos type which is very closely related to the presence of seagrassesas the habitat. From the 3 stations which have been taken based on the substrate heterogeneity, there found 6 species of seagrass such as Enhalus acoroides (Ea), Thalassia hemprichii (Th), Cymodocea serrulata (Cs), Cymodocea rotundata (Cr), Syringodium isoetifolium (Si), and Halophila ovalis (So), where these five types of seagrass are favourite food of Dugong. Besides, there also found meghabenthos type as the association biota which consists of molluscs, echinoderms and crustaceans types. At station 1, there found 20 species, station 2 found 13 species and station 3 found 9 species. Nutrient degree in the substrate also determines the presence of various species associated of seagrass habitats in Teluk Bakau. The average of nitrate degree is 3.65 ppm where include in the medium category. Furthermore, the average of phosphate degree in the substrate of seagrass habitats is 2.06 ppm which include in the low category. Despite of it’s important roles in shallow marine waters, not much credit was given to seagrass compared to coral reef and mangrove ecosystem. It was assessed indirectly in their role because of the existence of biota with economic values.

The antioxidant activity of carotenoid pigments in the bacterial symbionts of seagrass Syringodium isoetifolium

Carotenoids are pigments of red, yellow and orange which are found in plants, animals and bacteria, and are known to have antioxidant activity. This study aims to identify the carotenoid pigments detected in seagrass Syringodium isoetifolium bacterial symbionts. Isolation of bacteria was conducted using dispersive media Zobell 2116E. Bacterial isolates were cultured and then centrifuged at 8000 rpm for 10 minutes and extracted using methanol. Identification of the pigment was done by using High Performance Liquid Chromatography (HPLC) reversed phase ODS / C18. The mobile phase was carried out using a mixture of methanol: acetonitrile (7: 3 v / v). Free radical reduction activities determined by the method of DPPH (diphenylpicrylhydrazil) and its absorbance was measured at a wavelength of 517 nm. Identification of the bacterial symbionts from the seagrass S. isoetifolium performed using 16S rDNA PCR method. The results showed that, of the 12 bacterial isolates obtained, isolate 7A was proven to contain caratenoid pigment. Pigment extracts of the bacterial isolates had free radical DPPH reduction activity of 40.4%. The results showed that the identification of bacteria isolates 7A had 100% level of kinship with the bacteria Bacillus amyloliquifaciens.

A natural anticancer pigment,Pheophytin a,from a seagrass acts as a high affinity human mitochondrial translocator protein (TSPO) ligand, in silico, to reduce mitochondrial membrane Potential (∆ψmit) in adenocarcinomic A549 cells.

BackgroundThe present investigation looks at the most likely possibilities of usage of a naturally occurring photosynthetic pigment, Pheophytin a, from the seagrass, Syringodium isoetifolium, for plausible use as human TSPO ligand. MethodsPheophytin a isolated in our laboratory previously was administered to A549 cell lines in vitro to examine its effects on cell migrations, DNA, cell cycle, Mitochondrial Membrane Potential and gene expressions. In silico tools were used to predict the nature of the compound and target binding. ResultsPheophytin a hadIC50 values of 22.9 ± 5.8 µM for cancerous A549 cell lines, whilst not targeting non-cancerous vero cells [IC50: 183.6 ± 1.92 µM]. Pheophytin a hindered cellular migration, fragmented DNA, arrested cell cycle precisely at S phase, reduced ∆ψmit and directed mRNA expressions toward apoptosis. In silico tools indicate that the compound binds to TSPO with high effectiveness to collapse ∆ψmit(which is proved using wet lab experiments) to promote mitophagy. ConclusionHence Pheophytin a could be seen as a possible TSPO ligand for targeting metastatic alveolar cancers like A549 via intrinsic apoptotic pathway. General significanceGiven the inherent non-toxic nature of the compound and easy extractability from almost all autotrophic eukaryotes, one could be confident to testing in animal models.

Diversity species and condition of seagrass ecosystem in Teluk Awur and Prawean Jepara

Seagrass bed ecosystem is one of the coastal marine ecosystems which supports the health of coral reef ecosystem. The purpose of this study was to determine the diversity of species and seagrass conditions in Teluk Awur and Prawean Jepara. Nowadays, increasing land development and coastal activity highly affect the condition of seagrass bed ecosystem. This research used transects quadrant method with 100 meters length. Water quality (pH, salinity, depth and substrate) were also measured. The research result showed that there were 5 species found in both site i.e. Enhalus acoroides, Cymodocea rotundata, Cymodocea serrulata, Thalassia hemprichii, and Syringodium isoetifolium. The lowest dominance was found in Teluk Awur for the S. isoetifolium (0.65%), while the highest dominance in both research areas is C.serrulata. The seagrass coverage showed an unhealthy condition at both location (28.55% and 48.71%). Fisherman’s traditional boat activities as well as fishing and trampling activities are suspected to be the main cause of the decreasing health index of seagrass bed ecosystem at both stations.