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Wildlife existence and potential threats in Pelangi Forest Biosite of Ijen Geopark, East Java, Indonesia ARIF MOHAMMAD SIDDIQ; AGUNG SIH KURNIANTO; HARI SULISTIYOWATI; MUHAMAD TENTREM WIJAYA; TRI RATNASARI; NILASARI DEWI; EVA TYAS UTAMI; TANTRI RARAS AYUNINGTYAS
Biodiversitas Journal of Biological Diversity Vol. 25 No. 11 (2024)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d251147

Abstract

Abstract. Siddiq AM, Kurnianto AS, Sulistiyowati H, Wijaya MT, Ratnasari T, Dewi N, Utami ET, Ayuningtyas TR. 2024. Wildlife existence and potential threats in Pelangi Forest Biosite of Ijen Geopark, East Java, Indonesia. Biodiversitas 25: 4487-4497. A comprehensive study of the diverse wildlife and potential threats at the Pelangi Forest Biosite (Rainbow Forest Biosite, RFB) of Ijen Geopark, East Java, Indonesia was conducted in May 2023. Bird and primate observations were carried out using the point count method, while herpetofauna observation was conducted using the Visual Encounter Survey (VES). Data collection on potential threats to community activities in the RFB used a questionnaire survey method. Data analysis used the Diversity Index (H’), Existence factor (Ef), and scale-Likert for potential threats. The Pelangi Forest is home to an impressive 62 wildlife species, including six amphibian species, nine reptile species, 46 bird species, and one primate species. The value of wildlife species diversity in RFB, calculated using the Shannon-Wiener index, is remarkably high (H= 3.48). The wildlife species in the Pelangi Forest had an average existence value of 41.94%, indicating a moderate uniqueness level, with the Javan lutung (Trachypithecus auratus (É.Geoffroy Saint-Hilaire, 1812)) standing out with the highest Ef value (80%). According to Likert-scale analysis, potential threats to biodiversity in the RFB of Ijen Geopark are relatively low (23.54%). However, some crucial notes for evaluating the conservation plan, namely the illegal poaching or hunting of wildlife species, such as birds and large mammals, still occur. Therefore, implementing education-based tourism, such as birdwatching or wildlife observation, can increase awareness and knowledge about conservation for tourists and society.
Ecological insights post-restoration from two decades of mangrove forest succession in Pangpang Bay, East Java, Indonesia HARI SULISTIYOWATI; RENDY SETIAWAN; ARIF MOHAMMAD SIDDIQ; RETNO WIMBANINGRUM; MUHAMMAD AFRIYANTO; ELA APRILIYANTI HASANAH; BUDI PUTRA MULYADI; ABDILLAH BARAAS
Biodiversitas Journal of Biological Diversity Vol. 26 No. 5 (2025)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d260527

Abstract

Abstract. Sulistiyowati H, Setiawan R, Siddiq AM, Wimbaningrum R, Afriyanto M, Hasanah EA, Mulyadi BP, Baraas A. 2025. Ecological insights post-restoration from two decades of mangrove forest succession in Pangpang Bay, East Java, Indonesia. Biodiversitas 26: 2299-2308. The Mangrove Pangpang Bay (MPB) in Banyuwangi District, East Java, Indonesia, has suffered significant degradation from anthropogenic pressures. A restoration project was launched in the late 1990s, and between 2000 and 2003, approximately 300,000 trees were planted across 70 ha. However, 22 years later, little is known about the structural and functional dynamics of the mangrove forest's succession. This study assesses the structural complexity, ecological functionality, and environmental resilience of the restored mangrove forest in MPB. Tree vegetation data were collected using 10x10 m² plots, and functional data were obtained through a semi-destructive method. Secondary data on species conservation status and geographic distribution were sourced from the IUCN Red List, while abiotic factors, including temperature, pH, and salinity, characterized environmental conditions. The MPB comprises 11 mangrove species from 5 families and 7 genera, dominated by Rhizophora mucronata and Sonneratia alba. Abiotic conditions, salinity (31.85%), soil pH (7.96), and temperature (29.89?) are favorable for mangrove growth, particularly for the Rhizophora. The Shannon-Wiener Diversity Index (H') was low (0.98), indicating secondary succession influenced by human-led planting. Mangrove tree density averaged 3,719 trees/ha, with 1,392 seedlings/ha, and vegetation volume was 18,556.10 m3/ha. The estimated carbon stock was 104.58 Mg C/ha, equating to 383.49 Mg CO2/ha and 277.42 Mg O2/ha. Salinity correlated positively with carbon stock and tree volume, while pH, temperature, and diversity showed negative correlations, indicating potential trade-offs in shaping the restored ecosystem of MPB. Additionally, the total biodiversity value of MPB was calculated to be 9,733,952,191.99 IDR per hectare.
Co-Authors ABDILLAH BARAAS Abdillah Baraas Adi Sucipto, Adi Afina Aninnas AGUNG SIH KURNIANTO AGUNG SIH KURNIANTO Agung Sih Kurnianto Agung Sih Kurnianto Agung Sih Kurnianto Ali Badrudin ALVAN SETIAWAN Amanda Dwi Nursalamah Ananda, Mia Bella Dwy Ananda, Rizky Putra Anis Syavira Avivatu Zahra Anugrah Bahtiar Triantono Aprilia Palupi, Annisaa Arif Pratiwi Asyifa Yasmin Ningrum Audina Rahma Sari Banun Kusumawardani Baraas, Abdillah BUDI PUTRA MULYADI Cahyono, Haris Dewi Setyari, Agustina Dewi, Nilasari Diah Ayuk Wulandari Dwi Setyati Dwi Susanto, Miftha Amilia Dwi Wardatul Rizkiah El Shania Ravitamala ELA APRILIYANTI HASANAH EVA TYAS UTAMI Febrianti, Silvia Dwi Fernanda Bagus Prasetya Fiky Binti Zakiyah Firda Fadri Firdaus, Anggun Sausan Firmansyah, Puji Fuad Bahrul Ulum Gita Puspita Sari Haikal Idris Maulahila Hanif Roudhatul Firdausiyah Hari Setiyowati Hari Sulistyowati Hasanah, Ela Apriliyanti IBNUL QAYIM Ika Puspitasari Imaniar, Raisa Indra Nurtjahjaningtyas Iqbal Setiawan Saputra Kholiq, Nur Khowatini, Husnul Lelono, Asmoro Mega Fatimah Rosana Mita Yuni Aditiya MUHAMAD TENTREM WIJAYA MUHAMMAD AFRIYANTO Muhammad Dafa Riansyah Muhammad Doni Gunarso Muhammad Kurniawan Muhammad Kurniawan Mukhamad Su'udi Munaa Aqidatul Ulaa Nadia Dwi Safitri NANANG DWI WAHONO Nanang Dwi Wahono Nazala Zaikumar Elfa Rizqi NILASARI DEWI NILASARI DEWI Nilasari Dewi Nilasari Dewi Nindha Ayu Berlianti Nindy Agusti Wulansari Nur Kholiq Nur Ainna Fairuz Jasmine Nur Kholiq Nur Widodo Pradana, Yuan Zulia Pratiwi, Arif Puji Firmansyah Puji Firmansyah Qisti, Nissaul Rani, Cynthia Ratnasari, Tri Rendy Setiawan Rizkiah, Dwi Wardatul Sabila, Firman Syauqi Nur Samsuri Samsuri Sattya Arimurti Setiawan, Rendy Sudarmadji Sudarmadji Sudarmadji Sudarmadji Sulistiyowati, Hari Supriadi, Dudun Tabah Wibisono, Hariyo TANTRI RARAS AYUNINGTYAS Tecky Indriana TRI RATNASARI TRI RATNASARI TRI ATMOWIDI Waki’atil Rosida Wasiatur Roziqoh Wati, Dewi Erna Wimbaningrum, Retno Wulansari, Nindy Agusti Yennita Dwi April Liana Yulianto, Roni ‪Wachju Subchan