The need for data and information is an essential issue in sustainable mangrove management. The availability of data from authorized institutions is essential considering the reliability and consistency of the data, both to process techniques and data availability. This study used national mangrove and landcover data produced by the Ministry of Environment and Forestry through online services. 11 data series (2000 – 2019) obtained through the Representational State Transfer (REST) Application Programming Interface (API) service. Application of spatial analysis of vector data through geoprocessing tools and attribute data management to determine the distribution and changes in mangrove cover and the factors that trigger changes. Estimated data indicate a 13.4% decline in mangroves in Riau Province, with an average decline of 2,495.9 hectares/year. Over 98% of mangrove changes into other functions are caused by human behavior towards mangroves; we need a genuine attitude to preserve the mangroves of Riau Province for the future
Bukit Rimbang Bukit Baling Wildlife Reserve (BRBB) was designated in 1982 and was established in 2014 based on the Decree of the Minister of Forestry SK Number. 3977 / Menhut-VIII / KUH / 2014 dated May 23, 2014 covering an area of 141,226.25 ha in Kampar Regency and Kuantan Singingi Regency, Riau Province. The aim of this study was find out about local community knowledge in the Wildlife Conservation Area (BRBB) about kelulut or stingless bee (Trigona spp.) cultivation and to know the relationship between the respondent characteristics with that knowledge. This method of this research was quantitative approaches. The number of respondents was 85 people, selected based on random sampling spread in Koto Lamo Village, Bukit Betung Village, and Tanjung Belit Selatan Village. Data were analyzed statistically by chi-square test. The results of this study show that the local community has knowledge about stingless bee cultivation at the “knowing” level. Individual factors that were significantly related to people's knowledge of stingless bee cultivation were gender, employment, and education
High-resolution satellite imageries believed to map the mangrove area well. Two satellite imageries with almost similar spatial resolution were expected to achieve this objective, including SPOT (Satellite Pour l’Observation de la Terre) 6 and a RapidEye. Two images covered the same area and acquired under the equivalent season at Kembung River, Bengkalis Island, Riau Province. A comparison was tested on several objectives. First, a comparison was conducted band by band through examining their statistical spectral analysis. RapidEye had a higher variance in all visible bands but low at NIR. Second, spectral separability using Jeffrey-Matusita distance was executed with three-band composites (SPOT 6/VNIR; RAPIDEYE/VNIR and RAPIDEYE/VNIR+RedEdge). SPOT 6 had better separability than RapidEye imageries compositions (VNIR+RedEdge and VNIR), with an overall accuracy of 79.9%, 75.3%, and 67.3%, respectively. Third, mangrove land cover classification. Three pixel-based classification rules were used, including a general classifier, maximum likelihood (ML), and two advanced classifiers, i.e., neural network (NN) and support vector machine (SVM). Results indicated that the use of SPOT 6 produced better overall accuracy than the other two image composition for each classifier. SVM was promising in the mangrove mapping algorithm compare to NN and ML.
Chaetognatha or arrow worms are one of the holoplankton groups whose distribution and diversity is quite high in waters. Chaetognatha has important role in the food chain and also functions as a bioindicator of oceanographic conditions. The abundance of Chaetognatha in the waters can affect the abundance of fish larvae and other zooplankton, so that information on its existence is very important in fisheries management. The aims of study to determine the diversity, distribution and abundance of Chaetognatha in the coastal waters of Dumai City, Riau Province. This research was conducted from April to September 2021 in the coastal waters of Dumai City. The number of sampling stations are three points and the number of samplings twice at each station. The number of Chaetognatha species in the coastal waters of Dumai City is relatively low, only 2 species were found, namely Eukronia calliops and Sagitta megalopthalmus. The distribution of Chaetognatha in the waters of Dumai City was quite even and found in three sites, although the abundances were relatively different. The abundance of Chaetognatha ranges from 19-322 ind/1000 m 3 , it is very low compare to other research.
Bukit Tigapuluh National Park had a lot of natural resource potential that could be used as an ecotourism object, one of them is a butterfly. This study aims to identify the diversity of butterflies (Rhopalocera) species at Talang Lakat Resort TNBT. The observation method used in this research was the transect line that made in three observation locations at the Camp Granite ecotourism object. The results of the butterfly inventory were found 40 species was identified from 110 individuals, which belonged to five families. The species diversity index (H ') in each location was classified as moderate with the highest value was at the Waterfall (3.14).
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