Tanjung Rising Coastal, located in Dendang Village, Bangka Belitung Islands, has a large variety of substrates and organisms. One of the types of marine life studied is the Mollusk Phylum including the Bivalve and Gastropod classes. To find out the diversity of Bivalvia and Gastropoda, this study was carried out on Tanjung Rising Coastal, Bangka Belitung Islands. The study was conducted in December 2020-August 2021, using belt transect method with purposive sampling technique. Samples were collected at station 1 with a sandy substrate and station 2 with a muddy substrate. The results of this study found 1,372 individuals from the Bivalvia class consisting of 7 families and 12 species, while from the Gastropod class yielded 2,630 individuals consisting of 5 families and 7 species. The diversity and evenness index at both stations is relatively low which means that there are species that dominate, because both stations have good habitats for the dominating species. In addition, temperature, pH, salinity, depth, and strong currents showed good values for Bivalvia and Gastropoda habitat. In summary, Tanjung Rising Beach is still a good habitat for invertebrate animals, especially Bivalvia and Gastropoda.
This study aims to development of media mobile learning based on android for learning the biology of nervous system material and to determine the effectiveness of media mobile learning based on android in improving students' conceptual understanding. The type of research used was development (R&D), population, and sample, namely class XI IPA 2 as many as 30 students at one of the public high schools in Bogor Regency which was carried out from January to May 2020. This development research procedure used a model (4D) consisting of 4 stages, namely Define, Design, Develop, and Disseminate. The instruments used were tests (pre- test and post-test), response questionnaire sheets, and documentation. The implementation of deployment trials was carried out using a one group pre-test and post-test research design. The results showed that the media mobile learning got a very feasible category. This is based on the average percentage of the assessment from the expert validation team, namely 82.75%. Media mobile learning Android-based on learning the biology of the nervous system material can improve students' understanding of concepts and almost all students respond positively. This is proven by an increase in the results of the pre-test and post-test values after using the application so that the N-gain value obtained is 66.5.
Limited information about Mollusks in Menganti Beach, Central Java has been a strong basis for researching its diversity. This study aimed to determine the mollusks' diversity in Menganti Beach, Kebumen. The research was conducted from April to May 2020, using a survey method and purposive sampling technique. Sampling was undertaken at three stations with the belt transect method. The results revealed 37 species with 1767 individuals from the Class Bivalvia, Gastropods, and Polyplacophora. Based on the diversity index value H '= 3.3, station 1 with the rocky sand substrate is the best for mollusks' habitat. The H' value at station 1 shows the highest diversity that the base substrate is dominated by sand and rocks, which are very supportive of mollusks. It is supported by the evenness value (E), which indicates evenly distributed species, and dominance value (D), which does not indicate a species' dominance. The a-biotic parameters at the three stations obtained an average morning temperature of 29 oC and 30 oC in the afternoon, pH of 7, and a salinity of 30 ‰ so that these values support the Mollusk habitat at Menganti Beach, Kebumen.Keywords:MolluskDiversityIntertidal ZonesCoastal
Research on the diversity of echinoderms at Drini Beach, Gunung Kidul, Yogyakarta has been conducted from December 2020 to July 2021. This study aimed to determine the Echinoderm diversity index. The method sampling technique used belt transect with determination by purposive sampling with three stations in the intertidal zone based on substrate variations. Station 1 had coral substrate type, station 2 had seagrass substrate type, and sand substrate type for station 3. The sample in this study was the species of Echinoderms found in the station area. After sampling, it obtained 7 species of Echinoderms consisting of 3 classes, classified into 4 orders, and 6 families. The diversity index at all stations is low, followed by a low evenness value and a high dominance value. The species Ophiocoma erinaceus was dominant at stations one and two, while the species Tripneustes gratilla was dominant at stations three. Moreover, the most common habitat for echinoderms is This is due to the availability of abundant food, laying places for echinoderms, and shelter to avoid predators. In addition, it is also supported by temperature, pH, salinity, strong currents, and a good depth for Echinoderm habitat
DEVELOPMENT OF MAMALIA MATERIAL POCKET BOOKS IN RAGUNAN PARGARS TO IMPROVE STUDENT'S CONCEPT MASTERAbstract. This study aims to develop a pocket book in learning biology in order to increase students 'enthusiasm for learning and is an effort to improve students' mastery of concepts. The research was carried out on class X high school students. Data collection was carried out at Ragunan Wildlife Park, Jakarta. The research was carried out in the even semester of the 2019/2020 school year, January to June 2020. The method used in this study was the R&D research and development method using the 4-D (Four D) model, namely Define, Design (Design). , Develop (Development), and Disseminate (Spread). The development of teaching materials is carried out in two stages, namely: Expert Validation and Revision of Learning Media. Based on the results of the study, it can be concluded that the pocket book Mammals of the Primate order which was developed with the define, design, develop stage has met the components that are in accordance with KD in the 2013 curriculum, the language used is easy to understand, the presentation of a pocket book that is full of color and the images shown are very supportive of the material. learning so that it can attract the reader's attention. The Primate Order Mammals pocket book shows valid results and is suitable for use in biology learning. The average value of expert validation from the content / content aspect was 83.5%, the language aspect was 83%, and the presentation aspect was 82.5%.
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