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Identification of Stomata Structures in Leaves of The Tradescantia Genus in The Meurandeh Langsa Region M. Ali Akbar; Khairunnisa; Enca Pepayosa; Amanda Lestari; Sahna Maulana Sitakar; Viska Annisa Sabrini; Rauzatul Jannah Mz; Siti Zubaida; Siska Rita Mahyuny
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.v23i1.4657

Abstract

Langsa City is a city located in the province of Nangroe Aceh Darussalam with an area of 262.41 km2 with a population of 165,890 people. Meurandeh Village is one of the villages located in Langsa city, precisely in Langsa Lama. Meurandeh is one of the places that produces plants from the Tradescantia genus. This research aims to identify and differentiate the stomata of three types of plants from the Tradescantia genus. The method used in this research is a qualitative method with observational data collection techniques. The results of this research show that the three types of plants from the Tradescantia genus have three neighboring cells and a tetracytic type of stomata. Of these three types of plants, there are differences in the shape and structure of the stomata.
Diversity of Pteridophytes Along Riverbanks in Tiganderket District, Karo Regency, North Sumatra, Indonesia enca pepayosa; Mawardi Mawardi; Tri Mustika Mustika
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/rumphiusv8i2p116-124

Abstract

The terrestrial ecosystem along the former cold lava flow channel in Tiganderket District, Karo Regency, plays a vital ecological role; however, research on Pteridophyte diversity in this area remains limited. Pteridophytes are recognized as key components of the post-eruption ecological succession of terrestrial vegetation. This study aimed to analyze Pteridophyte diversity along the former cold lava flow channel in Tiganderket District using the transect method across three locations (upstream, midstream, and downstream), alongside analyses of diversity (Shannon-Wiener index), dominance (Simpson index), and PCA. The study identified 16 species across 7 families, revealing a moderate level of diversity (H’ = 2.16–2.36) and low dominance (C = 0.11–0.14), with the community positively influenced by ambient temperature (26°C–34°C). In conclusion, the Pteridophyte community structure in the area is relatively stable, implying that the post-eruption ecosystem recovery or ecological succession process are proceeding effectively and in a balanced manner.