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Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences
Published by Universitas Brawijaya
ISSN : 20875517     EISSN : 25274376     DOI : -
Core Subject : Agriculture, Social,
Agriculture, Biological Sciences & Forestry Environmental Science
The Journal of Tropical Life Science (JTLS) provides publication of full-length papers, short communication and review articles describing of new finding or theory in living system, cells and molecular level in tropical life science and related areas. The journal publishes articles that report novel findings of wide Tropical Life system phenomenon in the areas of biodiversity, agriculture, fisheries, health, husbandry, forestry and environmental technology. JTLS has 1 volume with 3 issues per year.
Arjuna Subject : -
Articles 1,012 Documents
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Analysis Distribution Patterns and Correlation of Ecological Characteristics Affecting the Existence of the Maleo Birds (Macrocephalon maleo) in Central Sulawesi, Indonesia: Distribution and Ecological Drivers of Maleo in Central Sulawesi Abd. Karim , Wahyudin; Hadisusanto, Suwarno; Wibawaning Astuti, Raden Roro Upiek Ngesti; Pudyatmoko, Satyawan
Journal of Tropical Life Science Vol. 16 No. 01 (2026)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.16.01.08

Abstract

Macrocephalon maleo is an endemic bird species of Sulawesi that selects nesting sites based on specific environmental conditions, particularly optimal soil temperature, moisture, water content, soil weight, and texture (including clay, dust, and sand composition). However, studies examining the relationship between soil physical characteristics and microclimatic factors across multiple nesting sites remain limited. This study aims to analyze the distribution patterns and the correlation of ecological characteristics that influence the existence of maleo in Central Sulawesi. The research was conducted from February 2024 to March 2025 at seven locations with a total of 23 coordinate points, including nesting grounds near geothermal sources (Saluki, Lore Lindu National Park), coastal areas (Taima, Moilong, Batui, Ampana, and Balingara), and a riverbank area (Bukit Jaya). Field observations were carried out for 10 days at each location, during which 197 maleo birds were recorded. Maleo distribution patterns were analyzed using the Morisita Index, while the relationships between ecological factors and maleo presence were assessed using Pearson correlation analysis. The Morisita Index indicates a clumped distribution pattern, with values ranging from 2.0 to 5.0. The average sand temperatures recorded were 33.9°C in the geothermal area (Saluki TNLL); 35.0°C, 34.4°C, 35.4°C, 33.13°C, and 32.9°C in the coastal areas (Taima, Moilong, Batui, Ampana, and Balingara), and 36.1°C in the riverbank area (Bukit Jaya). The results indicate that soil-related ecological factors, particularly water content, soil texture, and sand weight, had a stronger influence on maleo presence than ambient microclimatic variables such as air temperature, humidity, wind speed, and light intensity. Soil texture influences water retention, aeration, heat absorption, and soil consistency. Sandy soils tend to absorb and release heat efficiently, thereby creating suitable incubation conditions for maleo eggs in natural nesting habitats.
Community Structure and Ecological Roles of Soil Macrofauna in Sumatran Elephant Feces as an Effort to Conserve Soil Biodiversity in Bengkulu Elephant Training Center, Indonesia: Community Structure and Ecological Roles of Soil Macrofauna in Sumatran Elephant Feces Darmi, Darmi; Rizwar, Rizwar; Warosuly, Tri Nurhidayati; Julita, Helika
Journal of Tropical Life Science Vol. 16 No. 01 (2026)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.16.01.09

Abstract

Elephant feces are a source of organic material that has the potential to support soil ecosystem sustainability. Elephant feces serve as a microhabitat, providing nutrients and a place to live for soil macrofauna that plays an important role in soil decomposition. However, the understanding of the community structure and ecological contribution of macrofauna in elephant feces is still limited, especially in the Bengkulu Elephant Training Center area. The objective of this study was to analyze the community structure and ecological roles of soil macrofauna in Sumatran elephant feces at the Seblat Elephant Conservation Area. Soil macrofauna in elephant feces is divided into two groups, namely Macroarthropods and Oligochaeta (Megadrilli earthworms). Macroarthropod samples were collected using the handsorting method on each bolus of feces, while earthworms were collected using the square method and the handsorting method on feces that had undergone further decomposition. The community structure of soil macrofauna in elephant feces consists of 18 species. Arthropoda comprises 15 species belonging to the classes Hexapoda, Arachnida, Crustacea, and Diplopoda. Trigoniulus corallinus is a dominant macroarthropod species with an absolute category (very frequently found) and a wide distribution in elephant feces.  Oligochaeta consists of three species of megadrilli earthworms, namely Pontoscolex corethrurus, Drawida sp., and Pheretima  Javanica.  Drawida sp. have the highest density and were classified as constant (frequently found) in elephant feces. The Shannon-Wiener and Simpson’s diversity indices for soil macroarthropods are relatively high, whereas those for Oligochaeta are low. Based on ecological roles, soil macroarthropods consist of detritivores, omnivores, predators, and herbivores. Detritivores are dominant in elephant feces. Among the Oligochaeta, epigeic earthworms are more dominant than endogeic earthworms. The presence of elephant dung in the central area of the Elephant Training Center is a means of conserving soil biodiversity, thereby contributing to improving soil quality and fertility.

Page 102 of 102 | Total Record : 1012

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