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INDONESIA
REINWARDTIA
Published by Lembaga Ilmu Pengetahuan Indonesia
ISSN : -     EISSN : -     DOI : -
Core Subject : Education,
Education
Arjuna Subject : -
Articles 7 Documents
 1 
Search results for , issue "Vol. 23 No. 1 (2024)" : 7 Documents clear
DIVERSITY OF MANGROVES AND ASSOCIATED PLANTS IN MANDANGISIAO ESTUARY, MISAMIS ORIENTAL, PHILIPPINES WELLA BABE O; SITOY; DAVE P. BUENAVISTA
Reinwardtia Vol. 23 No. 1 (2024)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/reinwardtia.2024.4604

Abstract

The study aimed to assess the diversity status of mangroves and associates. Four transect lines were established perpendicular to the shoreline, ranging from 20 to 100 meters based on mangrove stand size. Along these transects, three 10 m × 10 m quadrat plots were set up to evaluate mangrove trees, and within each quadrat, a 2 m × 2 m regeneration plot was established. The study calculated the di-versity indices, such as relative frequency, relative density, and relative dominance to determine the species im-portance value. A total of four mangrove species and two associated plants were identified, representing three mangrove families and three genera, as well as three plant families and three genera for associated plants. The record-ed species included Avicennia marina, Nypa fruticans, Rhizophora mucronata, Sonneratia caseolaris, Acanthus ebrac-teatus, and Acrostichum speciosum. The overall diversity value of the mangroves and associated plants was 0.87, indi-cating relatively low species richness. The true mangroves, Rhizophora mucronata exhibited the highest values for relative density (68.07%), while Nypa fruticans is the highest in terms of relative dominance (42.20%). Both have the same highest value in relative frequency (32.43%). All in all, the highest species importance value for true mangroves is Rhizophora mucronata with 126.23%. In associated plants, highest value of relative density and relative frequency belongs to Acanthus ebracteatus with 58% and 60%, respectively. Subsequently, the highest species importance value for associated plants is 118% for Acanthus ebracteatus. The study concluded that the Mandangisiao Estuary in Jasaan, Misamis Oriental has a limited species diversity, contrary to the initial hypothesis. Furthermore, the mangrove forest in the estuary faces potential threats from garbage dumping, tree cutting, boat mooring, and human encroachment, despite all the recorded species having a Least Concern conservation status.
THE LOCAL COMMUNITY UNDERSTANDING OF THE FACTORS INFLUENCING THE DECLINE OF SANINTEN (CASTANOPSIS ARGENTEA (BLUME) A.DC.) AND TUNGURUT (CASTANOPSIS TUNGURRUT (BLUME) A.DC.) IN THE BUFFER VILLAGES OF THE GUNUNG HALIMUN-SALAK NATIONAL PARK ELBIBIYA IZZUL PENIDDA; UMARI JUMARI; KARYADI BASKORO; DENI SAHRONI; PENIWIDIYANTI PENIWIDIYANTI; WAWAN SUJARWO
Reinwardtia Vol. 23 No. 1 (2024)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/reinwardtia.2024.4710

Abstract

Saninten (Castanopsis argentea) and tungurut (Castanopsis tungurrut) are plant species belonging to the family Fagaceae, native to the mountainous forest ecosystem within the Gunung Halimun-Salak National Park (GHSNP). These species are currently classified as endangered according to the IUCN Red List due to their significance in providing seeds for consumption and wood for construction materials. This research aims to examine the local community’s knowledge concerning the presence, scarcity, and underlying causes of the decline of both species in the buffer villages of GHSNP. In this study, we employed survey methods and semi-structured interviews conducted with various informants. The data collected were meticulously described and analyzed descriptively. The findings revealed that the local community, in general, holds knowledge about the scarcity of species primarily based on field observations rather than legal or conservation status. Currently, both species are challenging to locate in the buffer villages of the GHSNP. According to the local community’s knowledge, the causes of species scarcity can be categorized into internal and external factors. Internal factors include both species having a slow natural regeneration pattern, difficulties in germination, and vulnerability of seedlings to environmental conditions. Meanwhile, external factors encompass seed and timber exploitation, habitat loss, climate changes, limited knowledge, skills, and understanding of forest plants, and the current perception among locals that C. argentea and C. tungurrut offer limited economic benefits, leading to the gradual neglect of these species’ existence.
SIDA PENAMBANGENSIS (MALVACEAE), A NEW SIDA SPECIES FROM EAST JAVA, INDONESIA THEMAS FELAYATI; HIMMAH RUSTIAMI; RATNA SUSANDARINI
Reinwardtia Vol. 23 No. 1 (2024)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/reinwardtia.2024.4761

Abstract

A new species of Sida from Penambangan Village, Sidoarjo, East Java related to Sida acuta is described as Sida penambangensis Felayati, Rustiami & Susandarini. It is distinguished from Sida acuta Burm.f. with at least six characters such as stem covered with obvious long trichomes, reddish-purple at upper leaf margin, stipule subulate-falcate, pedicels not articulated, mericarps 9–11 with pair linear awns 0.8 mm long with simple and stellate pubescence. It is described and illustrated here as a species new to science.
BEGONIA TANGGAMUSENSIS, A NEW SPECIES OF BEGONIA SECT. PLATYCENTRUM FROM GUNUNG TANGGAMUS, SUMATRA AND NOTES ON ALLIED SPECIES BEGONIA SCOTTII AND BEGONIA PSEUDOSCOTTII MARK HUGHES; DEDEN GIRMANSYAH
Reinwardtia Vol. 23 No. 1 (2024)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/reinwardtia.2024.4772

Abstract

A new species, Begonia tanggamusensis Girm. & M.Hughes (§ Platycentrum), is described from Gunung Tanggamus in southern Sumatra, where it is endemic. It grows on moss covered rocks and at the base of large trees in montane forests at an elevation of 1,700–2,000 m. A provisional conservation assessment places the species in the Near Threatened category.
LEAF ANATOMICAL ADAPTATION OF EXOTIC INVASIVE MICONIA CRENATA (VAHL.) MICHELANG ALONG ALTITUDINAL GRADIENT: A CASE STUDY OF MOUNT GEDE PANGRANGO NATIONAL PARK, WEST JAVA, INDONESIA DECKY INDRAWAN JUNAEDI; EKA FATMAWATI TIHURUA; WIDOYANTI WIDOYANTI; DEDEN GIRMANSYAH
Reinwardtia Vol. 23 No. 1 (2024)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/reinwardtia.2024.4755

Abstract

Miconia crenata is a widely spread species that occurs in multiple ecosystems. However, there is limited information on M. crenata invasion biology, ecology, and anatomy, particularly in the context of mountainous tropical forest and biodiversity management. Therefore, we examined elevation effects upon leaf anatomical structure of exotic invasive M. crenata at Mount Gede-Pangrango National Park (MGPNP). We sampled the leaves at four different elevations i.e., 715 m asl, 800 m asl, 900 m asl, and 1,000 m asl. Cross section leaf anatomy specimens of M. crenata were obtained by using paraffin method and stained with safranin and fast green. This study found that M. crenata leaf anatomy was correlated with elevation shown by changes in leaf tissue thickness and stomata size. Further study is needed of leaf anatomical variation of exotic invasive species along driven by soil properties and the variation across different plant taxa and growth forms. Such studies are important to determine adaptation capacity of invasiveness.
Front Cover Reinwardtia Vol. 23, No 1 (2024) Editor
Reinwardtia Vol. 23 No. 1 (2024)
Publisher : BRIN Publishing (Penerbit BRIN)

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Abstract

Preface Volume 23 (1) Year 2024 Editor
Reinwardtia Vol. 23 No. 1 (2024)
Publisher : BRIN Publishing (Penerbit BRIN)

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