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All Journal Jurnal Biologi Tropis Rumphius Pattimura Biological Journal
Miduk Leonardo Tambun
Universitas Samudra
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology

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Morphological and Morphometric Identification of Amphibians (Rana) in Meurandeh Dayah Village, Langsa City Miduk Leonardo Tambun; Lusi Selvina Hutabarat; Sirem Suri; Nuryati; Siti Rhadiatun Mardiah; Ayu Wahyuni
Jurnal Biologi Tropis Vol. 23 No. 2 (2023): Special Issue
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v23i2.6175

Abstract

Amphibians, categorized as vertebrate animals and characterized as poikilotherms, comprise three main groups known as Caudata, Gymnophiona, and Anura, with the latter commonly recognized as frogs or toads. The objective of this study is to examine the morphology and morphometrics of various frog species in Meurandeh Dayah Village, Langsa City. The research employs quantitative methods to facilitate a comparative analysis of each sample. The findings reveal the presence of six shutter species: Fejervarya cancrivora, Hylarana macrodactyia, Rana erythraea, Hylarana nicobariensis, Hyperolius horstockii, and Hylarana erythraea. The morphometric measurements conducted on these Rana species demonstrate distinctive morphological variations among them.
Anatomical Identification of Leaf Stomatal Cell Types in The Family Euphorbiacea Miduk Leonardo Tambun; Sirem Suri; Lili Anna Sari Siregar; Siti Rhadiatun Mardiah; Tri Mustika Sarjani
Jurnal Biologi Tropis Vol. 23 No. 1 (2023): Special Issue
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v23i1.6305

Abstract

Stomata, which are specialized cells on the surface of leaves, undergo modification to form structures containing two guard cells. These cells play a crucial role in facilitating the exchange of water vapor and gases between the plant's internal environment and the surrounding atmosphere. Typically located on plant parts exposed to air, such as leaves, stems, and rhizomes, stomata distribution varies among different species. While some plants exhibit stomata on both upper and lower leaf surfaces, others, like water lilies, exclusively feature stomata on the upper side.The objective of the current investigation was to analyze the stomatal anatomy of various plant species within the Euphorbiaceae family. Employing a qualitative descriptive approach, the study aimed to characterize and interpret the stomatal types present on the leaves of Euphorbiaceae plants in the Langsa City region. The findings revealed the presence of five Euphorbiaceae species in Langsa City, including Euphorbia mili (jade fern), Jatropha curcas (Jatropha curcas), Codiaeum variegatum 'Norma' (norma puring), Codiaeum variegatum Bi (jet puring), and Codiaeum finger (finger puring), all of which exhibited parasitic stomatal types.
Diversity of Crabs in the Mangrove Ecosystem at Jono Beach, Lalang Village, Batu Bara Regency Miduk Leonardo Tambun; Mawardi Mawardi; Fahmy Armanda
RUMPHIUS Vol 8 No 2 (2026): RUMPHIUS Pattimura Biological Journal (in process)
Publisher : Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/rumphiusv8i2p104-115

Abstract

Batu Bara Regency is a coastal area in North Sumatra Province with high natural resource potential, both ecologically and in supporting the socioeconomic activities of local communities. It also provides habitat for various crab species that play an important role in maintaining the balance of coastal ecosystems. This study aimed to determine crab diversity and its relationship with environmental parameters. The study employed an observational method with site selection using purposive sampling. The research was conducted from January to March 2026. Observations were carried out at three stations representing different mangrove substrate characteristics: Station I with sandy substrate, Station II with muddy substrate, and Station III with a mixture of sand, mud, and clay. Sampling was conducted using a 33-meter line transect with five plots measuring 5 × 5 m² arranged in a zig-zag pattern with a 2-meter distance between plots. Data analysis included abundance, relative abundance, diversity index, dominance, evenness, similarity, species richness, and Principal Component Analysis (PCA). The results showed 19 Crustacea species belonging to five families, with the highest abundance recorded for Perisesarma lanchesteri, reaching 3.821 ind/m² and a relative abundance of 36.75%. The highest diversity was recorded at Station III (H’ = 2.67), categorized as moderate. The highest dominance index was recorded at Station I (0.10), categorized as low, while the highest evenness was also found at Station I (1.13), categorized as high. Species richness was highest at Station III (2.07), categorized as low. The highest similarity was observed between Stations I–III and II–III (0.91), categorized as very high. PCA indicated that environmental parameters, particularly temperature, air humidity, and light intensity, were associated with Crustacea diversity at Station III. These findings demonstrate the role of environmental parameters in shaping Crustacea diversity patterns.
Co-Authors Abdul L. Mawardi Ayu Wahyuni Fahmy Armanda Lili Anna Sari Siregar Lusi Selvina Hutabarat Nuryati Sirem Suri Siti Rhadiatun Mardiah Tri Mustika Sarjani