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.

This study aims to analyze of tidal in the Eastern Bintan Island waters, including the harmonic constant value, water level elevation and type of tidal. This study used tidal observation data obtained from the Badan Informasi Geospasial (BIG) during 2015-2019. The tidal harmonic constant value is calculated using the Admiralty method, which is one of the harmonic methods that calculates the mean sea level and the sinuoidal function. Admiralty calculations used schemes and tables which are operationalized by Excel software. The water level field observation was carried out in August 2020 with the Tide master instrument. The analysis results obtained 9 harmonic constants which are then used to determine the Formzahl number and water level elevation. Furthermore, the calculation results of harmonic constants and water level elevations are used in tidal forecasting for the next 8 months using Worldtides software. The results showed that the Eastern Bintan Island waters had a tye of Mixed Tide Prevailing Semi Diurnal. Meanwhile, the water level elevation has a

Mangrove ecotourism management requires information about the ability of the ecosystem to support the presence of tourists so that environmental damage due to human activities can be minimized. This study aims to analyze the suitability of Mangrove Ecotourism for River Cruise in Pengudang Village and recommend the carrying capacity of mangrove ecosystems for ecotourism. The study was conducted using a Geographic Information System approach, data was collected through a Criteria survey for ecotourism to explore rivers and analyzed using a weighting and assessment approach. The results showed that the Pengudang mangrove ecosystem was feasible to be developed for River Cruise ecotourism with a TSI value ranging from 64-75%. Cluster 3 has the largest TSI value of 75%. This is influenced by several parameters such as the density of mangroves and the diversity of mangrove species in the area which attracts visitors to conduct tourism and educational activities. The limiting parameters in River Cruise ecotourism activities in Pengudang are the width of the river and the depth of the river which can only be passed by boats under 5 GT. The carrying capacity or ability of the mangrove ecosystem to accommodate ecological tourism reaches a maximum of 106 people/day.

Pengembangan pulau kecil untuk pemanfaatan ekowisata alam memiliki keterbatasan, salah satunya ukuran yang relatif kecil, sumber daya alam dan manusia yang terbatas sehingga aktivitas pemanfaatan wisata bahari pada ekosistem terumbu karang rentan menimbulkan dampak. Perairan Desa Pulau Duyung terdiri dari beberapa gugusan pulau kecil diantaranya Pulau Duyung, Pulau Salamanang dan Pulau Dasi merupakan gugusan pulau kecil yang memiliki potensi sumberdaya pesisir yang masih alami yang akan dikembangkan sebagai salah satu destinasi wisata bahari di Kabupaten Lingga. Pemanfaatan wisata bahari di pulau kecil rentan menimbulkan dampak terhadap ekosisitem, pengembangan harus memperhatikan batasan kemampuan lahan atau dikenal dengan daya dukung lingkungan. Implementasi konsep daya dukung lingkungan melalui pembatasan kapasitas daya dukung fisik yang mampu ditopang oleh kawasan dalam menerima kunjungan wisatawan di pulau kecil diharapkan mampu meminimalkan dampak negatif bagi ekosistem. Tujuan penelitian ini adalah untuk melakukan analisa kesesuaian ekowisata diving dan snorkeling serta kapasitas jumlah pengunjung yang diperbolehkan untuk kegiatan ekowisata diving dan snorkeling pada ekosistem terumbu karang di Perairan Desa Pulau Duyung. Pengamatan data lapangan kondisi status ekosistem karang dilakukan pada April 2014 dan pengumpulan data kualitas air diperoleh pada Agustus 2016. Pengamatan terumbu karang dilakukan dengan metode Line Intersept Transect (LIT). Hasil penelitian menunjukan bahwa persentase tutupan karang hidup di perairan Desa Pulau Duyung berkisar 23–64%, status terumbu karang termasuk dalam kategori sehat dengan persentase tutupan karang hidup rata-rata 36,93 % dengan kategori sedang. Bentuk lifeform terumbu karang terdiri dari Acropora sp, Lithopyllon sp, Montipora sp, Massif sp, Goniastrea sp, Favia sp, Platygyra sp dan Lobophyllia sp. Pulau Duyung dan sekitarnya sangat sesuai dikembangkan untuk ekowisata menyelam dengan nilai indeks kesesuaian wisata (IKW) rata-rata sebesar 80%, dan IKW rata-rata untuk wisata snorkeling mencapai 72,2 dengan kategori sesuai. Hasil perhitungan daya dukung fisik kapasitas pengunjung yang dapat ditampung untuk kegiatan Diving sebanyak 1.484 orang/hari dan snorkeling  maksimal 1.431 orang /hari.  Development of small islands to be used as natural tourism has limitations, one of which is the relatively small size, limited natural and human resources so that the activity of utilizing marine tourism on coral reef ecosystems is vulnerable to impact. Its development must take into account the limitations of land capability or known as environmental carrying capacity, which is expected to be able to minimize negative impacts in the ecosystem. The purpose of this study was to analyze the suitability of the waters for the development of marine ecotourism and calculate the carrying capacity of the Duyung Island area for Diving and Snorkeling Ecotourism activities. Field observations were carried out in April 2014 and August 2016, data analysis was carried out in May 2020. Observations of coral reefs were carried out using the Line Intercept Transect (LIT) method. The results of the study showed that the percentage of live coral cover on Duyung Island and its surroundings ranged from 23 – 64%, with an overall average of 36.93% or a moderate category. Duyung Island and its surroundings are suitable for developing marine ecotourism with a carrying

Several marine research have attempted to design a data observation system using Internet of Things (IoT). In the future, this system is predicted to become a necessity for marine researchers as a strategic technology to continuously access data. Therefore, this study provides information on the development and application of observation and data collection systems using IoT. The coastal weather and tidal data were obtained via the automatic coastal weather station and acoustic gauge respectively. Meanwhile, the various research activities commenced in July, 2018. In the first year, an operational observation system was developed, while comprehensive baseline data such as air temperature, humidity, wind speed, and sea surface level were also collected. This collection system is reliable, provides real-time data, and easily accessible with internet connection. Furthermore, the Bintan Marine Observation System (The Bintan MOS) is also suitable for other uses such as; monitoring water quality and marine mammals, as well as disaster mitigation. The adoption of this system by other sectors potentially conditions marine researchers for data exchange, to fully understand the fluctuations in coastal weather of Western and Eastern Indonesia as well as the tropical and sub-tropical marine weather. This study successfully developed the Bintan MOS, capable of providing reliable information both off-line and real-time.Keywords:Marine observation systemCoastal weatherTidalBintan