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BIOTROPIA - The Southeast Asian Journal of Tropical Biology
Published by Southeast Asian Regional Centre for Tropical Biology
ISSN : 02156334     EISSN : 1907770X     DOI : http://dx.doi.org/10.11598/btb
Core Subject : Health, Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology Veterinary
BIOTROPIA, The Southeast Asian Journal of Tropical Biology, is a scientific publication of the Southeast Asian Ministers of Education Organization (SEAMEO) – Southeast Asian Regional Center for Tropical Biology (BIOTROP). It publishes articles in the broad areas of tropical ecosystems and environmental impacts, biodiversity conservation and sustainable development and biotechnology.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 520 Documents
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POTENTIAL OF CARBON SINK IN MANGROVE SUBSTRATES IN LEMBAR BAY, WEST LOMBOK, INDONESIA Firman Ali Rahman Firman; Dewi Putri Lestari; Alfian Pujian Hadi; Anis Syakiratur Rizki; Aisha Zea Almahyra; Arsya Zafran Alvarendra; Nuzuly Ilmia Cerminand; Nening Listari; R. Didi Kuswara; Zulkarnain Gazali; Maya Ekaningtias; Siti Wardatul Jannah; Baiq Yulia Hasni Pratiwi
BIOTROPIA Vol. 30 No. 3 (2023): BIOTROPIA Vol. 30 No. 3 December 2023
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2023.30.3.1956

Abstract

Mangroves are one of the coastal vegetation that can mitigate carbon (carbon sink and carbon storage). This study aimed to determine the potential for soil carbon stock found under stands of mangroves in Lembar Bay, West Lombok, and West Nusa Tenggara. The research began with the identification of the species and then proceeded toa sampling of the soil, which was then analyzed using the Walkley and Black method. The results showed that there were ten species of mangroves, namely, Rhizophora stylosa, Avicennia lanata, Avicennia marina, Bruguiera gymnorrhiza, Ceriops decandra, Excoecaria agallocha, Lumnitzera racemosa, Scyphiphora hydrophyllacea, Thespesia populnea, and Xylocarpus maluccensis. The highest soil carbon content percentage was found in the lower soil of the A. lanata (1.43 %C) mangrove, and the lowest was found in the lower-stand soil of E. agallocha (0.21 %C). Meanwhile, the carbon sinks per meter were 0.002-0.066 gC/m2, with an average of 0.020±0.020 gC/m2. The estimated total soil carbon sink in 10 mangrove stands was 0.20-6.60 tons C/ha, with an average of 2.18±2.010 tons C/ha. The average total estimated soil carbon stock found in 20.49 ha of the mangrove area studied was 44.67 tonsC, which is equivalent to 263.69 tonsC in a mangrove area of ​​120.96 ha in Lembar Bay.
BRYOPHYTE DIVERSITY AND ATMOSPHERIC POLLUTION IN A RESIDENTIAL AREA AND AN INDUSTRIAL URBAN FOREST IN JAKARTA, INDONESIA Afiatry Putrika; Andi Salamah; Mega Atria; Dian Hendrayanti; Nurul Laksmi Winarni; Eliza Pricilia Purba; Sarah Tsabitudinillah; Nunik Sri Ariyanti
BIOTROPIA Vol. 30 No. 3 (2023): BIOTROPIA Vol. 30 No. 3 December 2023
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2023.30.3.1960

Abstract

Bryophytes are nonvascular plants that have simple structures that are sensitive to environmental changes, and they can, therefore be used as indicators of air quality. The presence of bryophytes in disturbed urban ecosystems, such as residential and industrial areas, indicates that their structures have adapted to survive in such areas. The objective of this study was to compare the bryophyte diversity and air quality indices between a residential area and an industrial area in Jakarta. The research was conducted in the Bona Indah residential area in South Jakarta and the Jakarta Industrial Estate Pulogadung (JEIP) urban forest. Sampling was carried out using the transect method in the residential area and the quadratic method in the urban forest on three different substrates, namely rocks or concrete, soil and tree trunks. The percentage of the epiphytic bryophyte cover was measured using a 10 × 10 cm subplot. Voucher specimens were stored at the Herbarium UI DEP and Herbarium IPB. Twenty-one species of moss and three species of liverwort were found in the two locations. Bryophytes were found on all the substrates in the residential area, but in the urban forest, they were found only on tree trunks and rock/cement substrates. Based on the Shannon–Wiener Index, although both locations had moderate bryophyte diversity, the residential area’s bryophyte diversity was higher than that of the urban forest. The index of atmospheric purity in the residential area was 4.3, indicating a high level of pollution, and it was 0.3 in the urban forest, showing that it was also very polluted.
DIVERSITY OF ECTOPARASITES ON BATS IN DRAMAGA, BOGOR, INDONESIA Virgilius Martin Kelake Kedang; Yanri Rizky Natanael Simangunsong; Susi Soviana; Upik Kesumawati Hadi; Supriyono
BIOTROPIA Vol. 30 No. 3 (2023): BIOTROPIA Vol. 30 No. 3 December 2023
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2023.30.3.1963

Abstract

Ectoparasites infestation is one of the major health problems affecting animals, including bats, which are known as reservoir hosts for various pathogens. Several reports have shown that a comprehensive understanding of ectoparasites on these animals is crucial from a public health perspective. Therefore, this study aims to identify the diversity of ectoparasites on bats in Dramaga, Bogor, Indonesia. The samples were captured at night with a mist net and then identified using the species identification key. Ectoparasites were collected from the body of the samples and identified using a microscope. A total of 56 bats from 9 species, namely Cynopterus brachyotis, Cynopterus sphinx, Cynopterus titthaecheilus, Macroglossus sobrinus, Rousettus leschenaultii, Myotis muricola, Nycteris javanica, Pipistrellus javanicus, and Scotophilus kuhlii were obtained in this study. The results of ectoparasites identification showed the presence of Basilia spp., Eucampsipoda sp., Leptocyclopodia ferrarii (Nycteribiidae), Raymondia sp. (Streblidae), Meristaspis spp., Spinturnix spp. (Spinturnicidae), and ticks (Ixodidae). The total prevalence of infested bats was 51.7%, with females tending to have a higher intensity compared to males. Bats species with the highest prevalence of infestation were Rousettus leschenaultii and Myotis muricola. Meanwhile, this study found no ectoparasites on Macroglossus sobrinus and Scotophilus kuhlii.
ANNUAL CARBON CAPTURE POTENTIAL IN BANANA GARDENS OF INDIA Arkalgud Ganeshamurthy
BIOTROPIA Vol. 30 No. 3 (2023): BIOTROPIA Vol. 30 No. 3 December 2023
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2023.30.3.2005

Abstract

The global interest in increasing the world's carbon stocks is skewed towards perennial woody ecosystems. But a continuous shortage of land stands in the way of achieving the goal. We must therefore aim to explore viable alternatives. The banana as a potential carbon sequester attracted little attention from researchers. Therefore, this study aimed at estimating the potential of bananas in different states of India as potential carbon sequesters. Data was collected from twelve major banana producers between January 2021 and December 2022. One hundred banana gardens were sampled in each of the 12 banana-producing states, covering the major bananas grown (AAA, AAB, and ABB). The above-ground (AGB) and below-ground (BGB) biomass were calculated using the allometric equation with pseudostem volume as the allometric parameter. The dry weight obtained from the allometric equations was then converted to carbon using a dry weight to carbon conversion factor. Sequestered carbon varied with the AAA, AAB, and ABB of bananas. Banana plant carbon stock was also found to be very small, ranging from 2.573 to 6.407 t/ha, compared with very high soil carbon ranging from 39.55 to 77.14t. In all the banana-cultivating states, the proportion of carbon contained in the plant to that in the soil was only 8.286 percent, and that of soil carbon accounted for 91.714%. At the national level, the banana crop sequestered 48.627 million metric tonnes of carbon, with soil carbon accounting for 44.798 metric tonnes and plant carbon accounting for only 3.828 metric tonnes per year. Despite these small amounts of plant carbon, the banana cropping system enriches the soil by enabling much more carbon to be sequestered into the soil in amounts comparable to other perennial plantations.
ANTIBACTERIAL AND DIASTASE ENZYME ACTIVITIES OF HONEY Apis mellifera FROM INDONESIA Rosyidah, Rara Annisaur; Hasan, Akhmad Endang Zainal; Andrianto, Dimas
BIOTROPIA Vol. 31 No. 1 (2024): BIOTROPIA Vol. 31 No. 1 April 2024
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2024.31.1.2011

Abstract

The quality of monofloral honey from Apis mellifera as an antibacterial can be influenced by the activity of the diastase enzyme and the secondary metabolites from the nectar source. Therefore, this study aimed to compare the activity of the diastase enzyme and the effectiveness of monofloral honey derived from Apis mellifera bees as a natural antibacterial agent against Staphylococcus aureus and Escherichia coli. Sampling for monofloral honey was carried out from nine different nectar sources, namely Acacia carpa, Calliandra calothyrsus, Nephelium lappaceum, Melaleuca laucadendron, Ceiba pentandra, Mangifera indica, Coffea robusta 1, Coffea robusta 2, and Hevea brasiliensisensi. Furthermore, diastase content was determined using UV-Vis spectrophotometry and the bacterial inhibition zone using the disc diffusion method. The principal component analysis (PCA) was used to analyze the clustering of diastase enzyme and antibacterial activity. The results showed that the highest diastase activity in monofloral honey was Mangifera indica, Nephelium lappaceum, and Coffea robusta 2 at 20.00 DN. This was followed by Nephelium lappaceum, Ceiba pentandra, and Hevea brasiliensisensisensi at 10.00 DN, Acacia carpa at 6.67 DN, Coffea robusta 1 at 5.00 DN, and Calliandra calothyrsus 4.00 DN. The clear zones for Staphylococcus aureus on Coffea robusta 2, Acacia carpa, Nephelium lappaceum, Coffea robusta 1, Ceiba pentandra, Hevea brasiliensisensisensi, Nephelium lappaceum, Calliandra calothyrsus, and Mangifera indica were 19.47, 18.53, 17.73, 17.03, 16.12, 16.10, 16.03, 15.73, and 14.73 mm, respectively. Additionally, the clear zones for Escherichia coli on Ceiba pentandra, Coffea robusta 2, Acacia carpa, Coffea robusta 1, Melaleuca laucadendron, Mangifera indica, Hevea brasiliensisensisensi, Calliandra calothyrsus, and Nephelium lappaceum were 27.93, 26.13, 24.60, 24.53; 24.53, 24.07, 21.90, 21.60, and 21.53 mm, respectively. In conclusion, clustering analysis was conducted based on nectar sources to evaluate antibacterial and diastase activity. The clusters identified are cluster 1 consisting of Hevea brasiliensisensi, cluster 2 including Mangifera indica, and Nephelium lappaceum. Others are cluster 3 consisting of Acacia carpa and Calliandra calothyrsus, and clustergroup 4 including Nephelium lappaceum, Ceiba pentandra, Coffea robusta 1, and Coffea robusta 2. Therefore, it was necessary to carry out antibacterial testing of other bacteria, specifically Salmonella typhi, and determine the minimum inhibitory concentration (MIC) of honey with the best antibacterial activity in various concentration variations.
RESPONSE OF Amaranthus viridis PLANT FUNCTIONAL TRAITS TO NPK 12:12:17 AND NPK 15:15:15 FERTILIZERS Tong, Pei Sin; Ning Chew, Ker; Yin Yik, Hoe; Zhe Tan, Jin
BIOTROPIA Vol. 31 No. 1 (2024): BIOTROPIA Vol. 31 No. 1 April 2024
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2024.31.1.2020

Abstract

   A paradigm shift from the prevailing reliance on chemical methods to alternative weed-control approaches is necessary to achieve sustainable weed management. However, the understanding of weed biology explaining “how” and “why” remains insufficient in facilitating this shift. This study employed a trait-based approach — examined the number of leaves, number of inflorescences, and height — to investigate the growth and developmental patterns of Amaranthus viridis, a weed species in the tropics, in response to NPK fertilization. The experiments were carried out in three sets of weeds — wild population (untreated and not transplanted; n = 6), NPK 15:15:15 (transplanted and fertilized with NPK 15:15:15 from March 2020 to September 2020; n = 30), and NPK 12:12:17 (transplanted and fertilized with NPK 12:12:17 from May 2021 to September 2021). The NPK treatment sets comprised five treatments, including one untreated control, with six replications for each treatment. Pearson’s correlation coefficient (r) and linear regression (R2) in three models were estimated using leaves, inflorescences and height as dependent and independent variables. In Model 1, the number of leaves was the dependent variable and plant height was the independent variable; Model 2 included the number of inflorescences as the dependent variable and the number of leaves as the independent variable, whereas the number of inflorescences as the dependent variable and number of leaves and height as the independent variables were used in Model 3. All models exhibited a significantly positive correlation and R2 (p < 0.01). Specifically, Model 3, examining the interactions of inflorescence with leaf numbers and plant height, demonstrated higher values for both r and R2. In conclusion, this study reveals the distinct patterns of functional traits in A. viridis in response to fertilizers and within wild populations, providing predictive models applicable to diverse data types, with implications for understanding inherent growth and responses of weed species for sustainable weed management practices, particularly in collaboration with smallholder farmers.
TROPICAL PALMS AND FACTORS INFLUENCING THEIR DISTRIBUTIONS AND DIVERSITY, WITH A FOCUS ON Pinanga DIVERSITY IN SOUTHEAST ASIA Abdullah, Mohamad Farid; Md Jaafar, Salwana; Ahmad, Norhayati; Sukri, Rahayu Sukmaria
BIOTROPIA Vol. 31 No. 2 (2024): BIOTROPIA Vol. 31 No. 2 August 2024
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2024.31.2.2023

Abstract

ARTICLE HIGLIGHTS- The palm genus Pinanga is the most diverse in Southeast Asia. - Limited ecological studies on Pinanga show the influence of environmental factors.- High Pinanga endemism in Borneo requires conservation action.ABSTRACTPalms represent some of the keystone species in tropical forests, providing numerous ecosystem services. They are widely studied by botanists because of their iconic and majestic appearance, although ecological studies of palm abundance, distributions, and diversity have only recently begun to gain attention. The abundance and diversity of palms at different spatial scales can be influenced by various factors, such as climate, soil properties, hydrology, topography and forest structure; understanding these influences is essential for conservation. This review details four abiotic factors (climate, soil chemistry, hydrology and topography) and one biotic factor (forest structure) affecting palm distribution and diversity. The genus Pinanga, one of the most diverse genera of palms, is discussed in terms of its distribution and diversity in Southeast Asia. Ecological studies on Pinanga diversity in the region are examined, revealing the influence of micro- and macro-scale variation in environmental factors, such as litter depth and thickness, canopy openness and crown cover, elevation, slope, aspect, light intensity, humidity and air temperature. The existing knowledge gaps on Pinanga ecology in Southeast Asia are discussed, and the need for more studies on population structures, functional traits and determinants of Pinanga diversity and distributions within different lowland forest types in the region are highlighted. The high endemism shown by Pinanga necessitates a more comprehensive ecological understanding of this genus to better inform its conservation and protection.
EVALUATION OF METHODS FOR TOTAL RNA EXTRACTION FROM THE ENDOSPERM OF COCOS NUCIFERA VAR. MAKAPUNO IN VIETNAM FOR MOLECULAR ANALYSIS Thanh-Diem Nguyen; Huyen-Trang Vu
BIOTROPIA Vol. 30 No. 3 (2023): BIOTROPIA Vol. 30 No. 3 December 2023
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2023.30.3.2027

Abstract

Sap coconut (Cocos nucifera L. var. makapuno) in Vietnam is a mutant coconut variant; coconut water is in the state of lotus glue, and coconut rice is like cream. For high-quality transcriptome, sequencing, quality, purity and concentration of RNA are the key factors. However, coconut endosperm tissue has higher stiffness and fatness than the leaf tissue, which complicates the extraction process. Moreover, RNA is much more difficult to preserve than DNA. In this study, various RNA extraction methods were examined in Vietnamese waxy coconut endosperm tissue samples. Optimum extraction and preservation of the RNA using the simplest possible chemicals was the objective of this study. The modified CTAB method with LiCl and the TRI reagent method were tested and evaluated. The purity, concentration and quality of RNA after storage were improved. The findings indicated that the TRIsure extraction method with the addition of NaCl and β-mercaptoethanol yielded optimum RNA quality. The RNA concentration was 159 ng/µL, with a purity ratio of 1.94 ± 0.04 for A260/A280 and 1.58 ± 0.02 for A260/230. RNA samples remained stable for up to 3 weeks when stored in absolute ethanol at 8°C–10°C, which significantly reduced their degradation during transportation. This study facilitated the use of simple chemicals for high-quality RNA extraction from coconut endosperm and its preservation for applications in high throughput sequencing.
EFFECT OF BOILING CARICA PUBESCENS SEEDS ON ANTINUTRIENT CONTENT AND IN VITRO NUTRIENT DIGESTIBILITY Idayanti, Rahma Wulan; Rohani, Tatik; Yayuki, Fendi; Nur Syahrul, Alfian; Ayu Saputri, Ajeng; Puji Lestari, Endang; Purnomoadi, Agung; Purbowati, Endang; Arifin Hadi, Mukh
BIOTROPIA Vol. 31 No. 1 (2024): BIOTROPIA Vol. 31 No. 1 April 2024
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2024.31.1.2030

Abstract

This research was conducted to determine the chemical composition and anti-nutritional content of Carica Dieng seeds (Carica pubescens) and their in vitro digestibility after boiling. The process of boiling is frequently employed to reduce antinutrient content and increase the digestibility of nutrients. This research used a completely randomized design, consisting of three treatments with boiling durations of 0, 10, and 20 minutes, each repeated six times. The research revealed a significant (p<0.05) decrease in the tannin and saponin levels of Carica Dieng seeds following the boiling process. The concentration of carica seed tannin was lowered to a range of 36-48%, while the saponin content decreased by 52-58%. Subsequently, a descriptive analysis was conducted to assess the nutritional and amino acid composition of the seeds after boiling them for a duration of 10 minutes. Lysine (1.57% w/w) dominated the essential amino acids in Carica pubescens seeds, and glutamic acid (3.19% w/w) dominated the non-essential amino acids The digestibility of boiling carica seeds as feed was assessed by including them into complete feed at different proportions: 0% (T0), 5% (T2), 10% (T3), and 15% (T4). This experiment followed a Completely Randomized Design with five replications. The variables included in-vitro dry matter (DMD) and organic (OMD) digestibility. The DMD of carica seeds at a concentration of 0% showed a statistically significant difference (p<0.05) when compared to the addition of 5% carica seeds. However, there was no significant difference in DMD between adding carica seeds at levels of 10% and 15% in the total meal. The organic material digestibility variable showed that the treatment without carica seeds was not significantly different from adding 10% carica seeds but was substantially different from adding 5 and 15% carica seeds. Carica pubescens seed supplementation of up to 10-15% remains viable for inclusion in whole feed since it does not reduce digestibility.
BIOLOGICAL ASPECTS OF MANGROVE CRAB (Scylla serrata) AT THE BELADEN ESTUARY, DOMPAK, TANJUNGPINANG, RIAU ISLANDS Susiana, Susiana; Kurniawan, Dedy; Rochmady, Rochmady; Nurwisti, Isnaini; Rezky, Bintan; Lestari, Febrianti
BIOTROPIA Vol. 31 No. 1 (2024): BIOTROPIA Vol. 31 No. 1 April 2024
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2024.31.1.2036

Abstract

Mangrove crab (Scylla serrata) is one of the marine organisms that are of significant economic importance. The habitat is distributed in the coastal areas of Indonesia, within the extensive mangrove ecosystems, such as the estuary of Beladen in Dompak, Tanjungpinang. The Beladen estuary area features a flourishing mangrove ecosystem, which supports a diverse range of crab species, with a particular focus on the populations. Therefore, this study aimed to obtain several aspects of mangrove crab in the Beladen estuary, Tanjungpinang. Sampling by the census method was also carried out once every two weeks from May to June 2022. The results showed that the size composition of mangrove crab had a carapace width (CW) of 70-144 mm. The length-weight relationship reported that female and male exhibited a negative and positive allometric growth pattern (b < 3) and (b > 3), respectively. The proportion of male and female was 63% compared to 37% (sex ratio 1:0.59). The value of gonadal maturity index (GMI) in each size class ranged from 2.6512-7.1445 and 1.8751-6.7979 for male and female mangrove crab. Male and female gonadal maturity levels were predominantly categorized as II and III, indicating that crab with mature gonads was not encountered.

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