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Biodiversity of Tree Species: Composition and Structure in Raden Soerjo Grand Forest Park, Batu, East Java, Indonesia Khoirunnisa, Khoirunnisa; Wisanti, Wisanti; Indah, Novita Kartika; Iman, Muhamad Hilmi Ihsanul; Ullah, Lisa Rohmatul
Al-Kauniyah: Jurnal Biologi Vol. 19 No. 1 (2026): AL-KAUNIYAH JURNAL BIOLOGI
Publisher : Department of Biology, Faculty of Science and Technology, Syarif Hidayatullah State Islami

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/kauniyah.v19i1.43321

Abstract

Raden Soerjo Grand Forest Park is a conservation area in East Java with moderate tree diversity. This study analyzed the diversity, composition, and structure of trees in three vegetation types: open forest, closed forest, and post-fire forest. Data collection used a systematic sampling method with random start. Data in the form of tree species names and numbers of individuals were analyzed to determine the ecological index and Canonical Correspondence Analysis (CCA). A total of 25 species from 21 families were identified, with Fagaceae and Lauraceae dominating in open and closed forests, and Casuarinaceae in post-fire forest. Lithocarpus sundaicus showed the highest Importance Value Index in open and closed forests, while Casuarina junghuhniana dominated the post-fire forest. Pioneer species such as Homalanthus populneus, Ficus hispida, and C. junghuhniana were present in all vegetation types. The diversity index showed moderate diversity (1.79 and 2.09), low species richness (2.22 and 3.45), and high evenness (0.69 and 0.71) in open and closed forests. Tree distribution is dominated by the 61–80 cm diameter class in open and closed forests, and 41–60 cm in post-fire forests. CCA showed that light intensity, soil moisture, air temperature, and soil pH influence species distribution. Four species are endemic to Indonesia, with three species of conservation concern: Lithocarpus korthalsii and Canthiumera glabra (near threatened), and Saurauia bracteosa (vulnerable).
Pengembangan E-Book Tranpor Membran Berbasis Pendekatan SAINTIFIK untuk Melatih Keterampilan Berpikir Kritis Azizah, Enggarwati Nur; Wisanti, Wisanti
Berkala Ilmiah Pendidikan Biologi (BioEdu) Vol. 13 No. 2 (2024)
Publisher : Program Studi Pendidikan Biologi, FMIPA, Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/bioedu.v13n2.p266-276

Abstract

Abstrak Berpikir kritis merupakan kompetensi pendidikan berkualitas Sustainable Development Goals (SDGs) yang perlu dikuasai. Keterampilan tersebut dapat dilatihkan kepada peserta didik melalui pendekatan saintifik. Oleh sebab itu, dilakukan penelitian yang bertujuan menciptakan bahan ajar yang layak berupa e-book berbasis pendekatan saintifik untuk melatih keterampilan berpikir kritis pada materi transpor membran. E-book dikembangkan menurut model ADDIE yang meliputi tahap Analysis, Design, Development, Implementation, and Evaluation. Parameter penelitian berupa penilaian validitas, kepraktisan, dan efektivitas. Validitas berdasarkan pada penilaian ahli; kepraktisan berdasarkan keterbacaan dan respons peserta didik; dan efektivitas berdasarkan tes. Instrumen penelitian berupa lembar validasi, uji keterbacaan, angket, dan tes. Data dianalisis secara deskriptif kuantitatif menggunakan statistik sederhana berupa rata-rata dan persentase. Penilaian ahli menunjukkan validitas e-book sebesar 98% dengan kategori sangat valid. Uji keterbacaan berada pada level 10 dengan kategori praktis. Respons peserta didik sangat positif dengan persentase 96%. Ketercapaian indikator berpikir kritis sebesar 89% dengan kategori sangat baik dan nilai n-gain sebesar 0,77 dengan kategori tinggi. E-book transpor membran berbasis pendekatan saintifik dinyatakan layak sebagai bahan ajar Biologi kelas XI SMA ditinjau dari validitas, kepraktisan, dan efektivitas. Kata Kunci : E-book, transpor membran, pendekatan saintifik, keterampilan berpikir kritis, SDGs Abstract Critical thinking is a Sustainable Development Goals (SDGs) quality educational competency that needs to be mastered. These skills can be trained to students through a scientific approach. Therefore, research was carried out to produce appropriate teaching materials in the form of e-books based on a scientific approach to train critical thinking skills on membrane transport material. The e-book was developed according to the ADDIE model which includes the Analysis, Design, Development, Implementation, and Evaluation stages. The research parameters were in the form of an assessment of validity, practicality and effectiveness. Validity based on expert validation; practicality based on readability and student responses; and effectiveness based on tests. Research instruments include validation sheets, readability tests, questionnaires and tests. Data were analyzed descriptively quantitatively using simple statistics in the form of averages and percentages. Expert assessment showed that the validity of the e-book is 98% in the very valid category. The readability test was at level 10 with the practical category. Student responses were very positive with a percentage of 96%. The achievement of critical thinking indicators was 89% in the very good category and the n-gain value was 0.77 in the high category. The membrane transport e-book based on a scientific approach was is declared suitable as a Biology teaching material for class XI SMA in terms of validity, practicality and effectiveness. Keywords: E-book, membrane transport, scientific approach, critical thinking skills,SDGs