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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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EFFECT OF ANTI-MOLD AND MYCOTOXIN BINDER ON CORN QUALITY AND BROILER PERFORMANCE Nalle, Catootjie Lusje; Supit, Max A.J.; Jermias, Johanis A.; Kusumaningrum, Damai; Kefi, Melani; Benu, Ariska
BIOTROPIA Vol. 32 No. 1 (2025): BIOTROPIA Vol. 32 No. 1 April 2025
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2025.32.1.2319

Abstract

Article Highlights:- The anti-mold used effectively maintained low aflatoxin levels in 13% moisture corn.- Synthetic mold inhibitors effectively decreased aflatoxin levels in corn during storage and maintained some nutritional quality- Mycotoxin binder supplementation did not improve broiler- Broiler performance declined as aflatoxin concentrations increased Abstract: The quality of animal feed is determined by high-quality ingredients and appropriate feed additives. This study aimed to assess: 1) the nutrient and aflatoxin total (AT) content of corn treated with an anti-mold (A) and 2) broiler performance fed with aflatoxin B1 (AFB1)-contaminated diets supplemented with a mycotoxin binder (MB).  Two experiments were carried out to achieve the objectives. Experiment 1 was set up with a 2 x 2 Factorial Completely Randomized Design (FCRD) with two factors: moisture content (MC at 13 and 15%) and anti-mold (A, -/+). Meanwhile, Experiment 2 was set up with a  3 x 2 Factorial Completely Randomized Design with two factors: the AFB1 (< 100, 165, 222 µg/kg) and MB (-/ +). The MC and A interaction was significant (P < 0.01) on the aflatoxin total of corn throughout the 2-month assay. The utilization of the anti-mold in afla-corn with different moisture levels did not influence (P > 0.05) corn’s nutrient content. The MC x A interaction was significant (P < 0.05) in the valine and glycine content of the stored corn. In the second experiment, no interaction of AFB1 x MB (P > 0.05) was observed in the bird’s performance during the study. The AFB1 Concentration (AC) of corn decreased significantly (P < 0.05 to 0.001) in feed intake, body weight gain, and feed efficiency of birds. Our study concluded that the anti-mold effectively maintained low aflatoxin levels in 13% moisture corn. Also, the anti-mold did not affect the nutrient profile of corn during storage. Our study also showed that mycotoxin binder supplementation did not improve broiler performance and broiler performance declined as aflatoxin concentrations increased.
EFFECTIVENESS OF LIQCORIS ORGANIC PESTICIDE AS GROWTH INHIBITOR OF PLANT PATHOGENIC MICROORGANISMS Rosita, Risa; Eris, Deden Dewantara; Bait, Misbakhul; Imran, Dr. Zulhamsyah; Widayanti, Sri; Bigcas, Evelyn V.; Subchan, Wachju
BIOTROPIA Vol. 32 No. 1 (2025): BIOTROPIA Vol. 32 No. 1 April 2025
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2025.32.1.2347

Abstract

Article Highlights:- First study on Liqcoris, an organic pesticide made from coconut waste.- 15% Liqcoris concentration effectively inhibits pests and plant pathogens.- Active compounds include phenol and carbamic acid.- Pest and fungal pathogens were isolated directly from diseased plants in a school garden.- Coconut waste-based pesticide offers practical, eco-friendly pest control solutions. Abstract:Sustainable control of plant diseases is essential to maintain biodiversity. Learning using prototypes is an effort to support students in understanding and learning science and technology in order to answer problems related to biodiversity loss. The research aimed to: 1) produce a prototype of Liqcoris organic pesticide (BLM 06) from coconut shell and shell waste, 2) measure the ability of the Liqcoris organic pesticide in inhibiting the growth of plant pathogenic microorganisms, and 3) study the content of  Liqcoris organic pesticide. The data obtained were statistically analyzed using the SAS Version 9.0 program. The analysis carried out was the analysis of variance (ANOVA). Duncan's advanced test was used at the 5% level to determine the differences among the treatments, i.e., 00 = control or without PDA + pesticide; 10 = PDA +  pesticide concentration 10%; 15 = PDA + pesticide concentration 15%, 20 = PDA + pesticide concentration 20%, and 25 = PDA + pesticide concentration 25%. Based on in vitro test, the study showed that Liqcoris concentration of 15% proved effective in killing phytopathogen fungi (P < 0.05), including Fusarium equiseti, Fusarium graminearum, Nigrospora sphaerica and Colletotrichum gloeosporioides. Treatments with various concentrations of 15%, 20%, and 25% effectively produced inhibitory values ​​in the diameter of pathogenic fungal colonies, respectively 0.118 cm, 0.000 cm, and 0.000 cm that were significantly different from concentrations of 10% (2.7140 cm) and control 0% (5.2180 cm). Considering the economic value of production, the best concentration of organic pesticides chosen was 15%. On the other hand, in vivo test results indicated that in controlling mosaic viruses on diseased curly chili variety TM 999, without Liqcoris treatment (control), the intensity of disease attack increased by 20.22% after 6 weeks after treatment (wat). Meanwhile, after applying Liqcoris organic pesticide with a concentration of 15%, the percentage of mosaic virus attacks decreased to 2.72% after 6 wat (P < 0.05). This study showed that the content of 15% Liqcoris organic pesticide was dominated by active compound phenol (35.16%) and carbamic acid, phenyl ester (23.61%).
METABOLITE PROFILING OF MORINGA USING PY-GCMS AND TOLERANCE EVALUATION TO ALUMINUM ON IN VITRO CULTURE Rudiyanto, Rudiyanto; Purwito, Agus Purwito; Efendi, Darda; Martin, Andri
BIOTROPIA Vol. 32 No. 1 (2025): BIOTROPIA Vol. 32 No. 1 April 2025
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2025.32.1.2354

Abstract

Article Highlight: Four accessions of Moringa oleifera from different regions in Indonesia were evaluated to identify with tolerance to aluminium (Al) stress Eight metabolites show a very high correlation with acetic acid (one of the metabolites associated with AlCl3 stress) including cyclopentene, 2-allyphenol, 4-ethynyl-6-8-dioxane, vinyl ether, ethanone 1-oxiranyl, 2-methylpyridine, 2-butanone, and ethanesulfonic acid. This research makes a significant contribution to understanding aluminium tolerance in oleifera by identifying tolerant accessions, clustering relevant traits, and highlighting key metabolites to in vitro culture. ABSTRACT Moringa oleifera Linn. has received substantial scientific interest due to its numerous bioactive compounds and its function as a nutritional resource. The absorption of aluminum by plants hinders several metabolic and physiological processes, leading to inhibited plant development and decreased agricultural output. Some accessions from different regions in Indonesia were evaluated to identify those with tolerance to aluminum (Al) stress. Al-tolerant selection was carried out in vitro through the selection method for Al stress by adding 0, 50, 100, 250, and 500 mg/L of AlCl3 to the media. Furthermore, identifying the metabolite profile of four M. oleifera accessions from four distinct regions in Indonesia: Blora, Bogor, Enrekang, and Bima, has been done using Py-GCMS. Specific metabolites associated with tolerance to Al stress and organic acids need to be identified. The highest survival rate was observed in the Bogor and Blora accessions when exposed to AlCl₃ at concentrations ranging from 0 to 250 mg/L, demonstrating greater tolerance to AlCl₃ than other accessions based on various variable, such as shoot height, number of shoots, number of petioles on a medium containing 100 to 250 mg/L of AlCl₃. The mean value was not statistically different from the control. Acetic acid was identified as one of the metabolites associated with AlCl₃ stress. A total of 21 metabolites were specifically correlated with acetic acid in a positive manner, among which 8 metabolites including cyclopentene, 2-allyphenol, 4-ethynyl-6-8-dioxane, vinyl ether, ethanone 1-oxiranyl, 2-methylpyridine, 2-butanone, and ethanesulfonic acid exhibited a very high correlation.
INTRA-SPESIFIC DIVERSITY OF BUTTERFLY PEA (Clitoria ternatea L.) REVEALED BY ISSR WITH INVARIABLE ITS RECORDS Yusuf, Adib Fakhruddin; Latifah, Vida Rahma; Nurcahyati, Vivi Indah; Nurhasanah, Anggun Diyan; Widyasari, Adristi Shafa; Nainggolan, Ananto Puradi; Hasibuan, Aldy Riau Wansyah; Hidayat, Madyan Akmal; Karmilah, Karmilah; Pratiwi, Arini Dian; Aurantika, Rindu; Hasanah, Muslifah; Aristya, Ganies Riza; Handayani, Niken Satuti Nur; Arisuryanti, Tuty; Lesmana, Indra; Daryono, Budi Setiadi
BIOTROPIA Vol. 32 No. 1 (2025): BIOTROPIA Vol. 32 No. 1 April 2025
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2025.32.1.2362

Abstract

Article Highlights:- The ITS region exhibits no genetic variation among butterfly pea genotypes.- ISSR reveals high polymorphism, proving effective for genetic diversity analysis.- White single and purple single genotypes show the greatest genetic distance.- ISSR-6 ((CT)₈TG) demonstrates the highest polymorphism and reliability for assessment.- The ITS sequences have been deposited in GenBank under the accession IDs PQ198055–PQ198061. ABSTRACTClitoria ternatea L., a perennial plant in the Fabaceae, is recognized for its resilience in tropical climates and its diverse applications in both culinary and medicinal fields. However, the limited exploration of its genetic diversity constrains breeding efforts aimed at improving desirable traits. This limitation highlights the need to optimize selection strategies, identify superior genotypes, and preserve valuable genetic resources for long-term conservation and crop enhancement. This study aimed to explore genetic variation using molecular markers to analyze C. ternatea genotypes based on petal architecture and color differences. To assess the genetic diversity of C. ternatea, Sanger sequencing of the Internal Transcribed Spacer (ITS) region and Inter-Simple Sequence Repeat (ISSR) markers were applied to seven wild populations from Sleman, Yogyakarta. The ITS region exhibited no genetic variation, indicating its conserved nature and limited ability to differentiate genotypes. In contrast, ISSR markers effectively detected genetic variation, identifying 62 polymorphic fragments out of 162 total bands. The highest genetic distance (0.297) was observed between the WS and PS genotypes, whereas the double-petal genotypes (WD and PD) displayed the closest phenetic relationship. Among the ISSR primers, UBC-808, UBC-812, and ISSR-6 exhibited high PIC and RP values, confirming their reliability in genetic diversity analysis. These results underscore the utility of ISSR markers as a robust tool for genetic diversity assessment, offering valuable insights for breeding programs and germplasm conservation in C. ternatea.
EXISTING CONDITION OF GASTROPODS COMMUNITY IN COASTAL AREAS AFFECTED BY NICKEL OVERBURDEN IN POMALAA DISTRICT, SOUTHEAST SULAWESI PROVINCE, INDONESIA Purnama, Muhammad; Prayitno, Slamet Budi; Muskananfola, Max Rudolf; Suryanti, Suryanti
BIOTROPIA Vol. 32 No. 1 (2025): BIOTROPIA Vol. 32 No. 1 April 2025
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2025.32.1.2416

Abstract

ARTICLE HIGHLIGHT             The present investigation provides substantiated empirical evidence demonstrating that nickel extraction operations have exerted considerable detrimental effects on the ecological integrity of the Pomalaa coastal region in Southeast Sulawesi. Environmental degradation and disruption of ecological equilibrium have been observed as direct consequences of persistent overburden waste disposal. The introduction of mining overburden into the Pomalaa coastal ecosystem has resulted in the extirpation of critical gastropod taxa and significant population reductions among persisting species when compared with control sites featuring undisturbed substrate conditions. The documented diminished gastropod population densities within nickel mining-affected zones serve as biological indicators of profound environmental deterioration attributable to these industrial activities. ABSTRACT Pomalaa District is the largest existing nickel mining center in Southeast Sulawesi Province, Indonesia. Pollutants from various anthropogenic activities, especially nickel mining overburden, end up in the Pomalaa coastal area. This research aimed to determine the structure of the gastropods community in the impacted area and reference site. This research was carried out in the Pomalaa coastal area, Kolaka Regency, from June to October 2023. Research stations were determined using purposive sampling method and simple random sampling techniques. On-site collecting gastropods samples were carried out manually (handpicking method). Impacted area and reference site showed significant differences in the number of species (16 and 21 species), presence, and density of gastropods, even though their respective ecological index categories were relatively the same (H' = 1.92 & 2.72; R =  2.93 & 3.41; E  = 0.55 & 0.78; C = 0.001 & 0.04). In the impacted area, the density of gastropods was very low (1 - 3 ind./m2), whereas at the reference site, the density reached 10 - 30 ind./m2. Gastropods inhabiting rocks or hard substrates, were relatively unaffected by the overburden, proven by stable population with a high density of 45 - 115 ind./m2. Nickel overburden input flowing to the Pomalaa coastal area greatly influenced the gastropods community in terms of species composition and density. On the other hand, the habitat (substrate) of gastropods as benthic organisms was covered and degraded by overburden piles up to 15 - 30 cm deep, which  was still increasing over time. On the other hand, in the reference site area, the condition was inversely proportional.
BIOREFINERY OF MICROALGAE: THE WORLD’S GREEN GEM FOR THE FUTURE SUSTAINABLE DEVELOPMENT Puja Asiandu, Angga; Sari, Widya; Saefun Naser, Ahmad; Rahmani Akmal, Wulan; Setyawan, Dedy; Aulia Yulyanita, Dita
BIOTROPIA Vol. 32 No. 1 (2025): BIOTROPIA Vol. 32 No. 1 April 2025
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2025.32.1.2421

Abstract

Article Highlights:- Integrated biorefinery provides economic and environmental benefits- Microalgae produce higher lipid content than plants- Generally, microalgae produce higher carbohydrate contents essential for bioethanol- Biohydrogen produced by microalgae is a future energy source- As a biofertilizer, microalgae promotes plant growth Abstract:Industrial and household activities leading to many pollutants have been reduced by the presence of microalgae in the phycoremediation. Microalgae transform pollutants into many forms of biorefinery, such as biofuel, biojet, bioethanol, biohydrogen, and biofertilizer. The chemical residue resulted from household and industrial activities has abundant elements (N, P, C) for microalgal cell growth. The contents of a microalgal cell, like lipid and carbohydrates, depend on the nutrition in the medium, the cultivation system, the microorganism-mediator, and the applied technology. Chlorella vulgaris, Botryococcus braunii, Spirulina platensis, Chlorella sp., Chlamydomonas sp., and Chlorococcum sp., are potential lipid-producing microalgae and are applied in biofuel and biojet. The carbohydrate of Cyanobacteria synechoccus sp., Nannochloropsis oculata, and Arthospira platensis is the main content to be utilized in bioethanol. Meanwhile, for the application of biohydrogen, H2 gas is converted from Scenedesmus obliquus fermentation. However, the process of bioethanol and biohydrogen needs bacteria as a mediator of fermentation. Spirulina and Scenedesmus are examples of microalgae supporting soil fertility as biofertilizers. Extraction of microalgae can increase growth promotors for plants, like amino acids, peptides, and proteins, and also antibacterial and antifungal. Optimizing excellent microalgae content in bioenergy will face several challenges, for example, imbalances of organic waste. However, the phycoremediation of microalgae is a sustainable and futuristic solution to fulfill the need for energy stock.
FATTY ACID PROFILES OF MICROALGAE ISOLATES FROM THE WATERS OF ITS DORMITORY POND IN SURABAYA, INDONESIA Mawardani, Alfiyyana Nurrahma; Ermavitalini, Dini; Saputro, Triono Bagus; Muzaki, Farid Kamal; Purnomo, Adi Setyo; Purnobasuki, Hery
BIOTROPIA Vol. 32 No. 1 (2025): BIOTROPIA Vol. 32 No. 1 April 2025
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2025.32.1.2428

Abstract

ARTICLE HIGHLIGHTS- Microalgae from ITS Dormitory Pond were identified using morphological analysis.- The study analyzed the fatty acid composition of four microalgae genera.- Dictyosphaerium had the highest total fatty acid content.- The findings suggest potential applications of these microalgae in biotechnology.- Further research is needed to improve fatty acid production. ABSTRACT Microalgae are a diverse group of autotrophic microorganisms classified into prokaryotic and eukaryotic groups. Their ability to thrive in various environmental conditions enables the identification of species with distinct fatty acid profiles. The absence of a microalgae culture collection at Sepuluh Nopember Institute of Technology (ITS) motivated the selection of the ITS Dormitory Pond as the research site. This study aimed to identify microalgae species present in the pond through morphological characterization and analyze their fatty acid profiles. Morphological identification was conducted using taxonomic references, while fatty acid composition was determined via GC-MS analysis. The results identified four genera: Dictyosphaerium, Vitreochlamys, Desmodesmus, and Chlorella. Their fatty acid profiles varied, comprising saturated (SFA), monounsaturated (MUFA), and polyunsaturated fatty acids (PUFA). Dictyosphaerium contained 17.57% SFA, 12.28% MUFA, and 0.33% PUFA, while Vitreochlamys had 10.83% SFA and 10.19% MUFA. Desmodesmus exhibited 14.19% SFA, 7.39% MUFA, and 4.14% PUFA, whereas Chlorella had 1.92% SFA and 2.67% PUFA. These findings highlight the potential of microalgae from ITS Dormitory Pond as a natural source of fatty acids. Further research is recommended to optimize culture conditions for enhancing commercially valuable fatty acid production.
EVALUATING HABITAT SUITABILITY AND ECOTOURISM POTENTIAL OF MANGROVE ECOSYSTEMS PROGO RIVER YOGYAKARTA Poedjirahajoe, Erny; Pahlevi, Muhammad Reza; Wardhani, Frita Kusuma; Satria, Ryan Adi; Saputra, Dimas Cahya Kurnia
BIOTROPIA Vol. 32 No. 1 (2025): BIOTROPIA Vol. 32 No. 1 April 2025
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2025.32.1.2433

Abstract

ARTICLE HIGHLIGHTS- The article introduces an evaluation of mangrove habitat suitability for ecotourism in the Progo River area, which has not been extensively studied in this region.- It employs nested and gridline sampling methods to measure habitat quality more comprehensively, leading to more accurate data on mangrove conditions.- The study examines the impact of physical and chemical factors such as temperature, salinity, and dissolved oxygen on mangrove growth and biodiversity.- It uses the Tourism Suitability Index to identify locations suitable for nature tourism activities around the Progo River.- The article stresses the need for improved management of mangrove ecotourism areas to preserve ecosystem sustainability and support the local economy. ABSTRACTMangrove forests are a transitional ecosystem located between land and sea. Habitat factors greatly influence the growth of mangrove plants. Habitat suitability is reflected in the suitability of the species that can grow in the habitat. Increased growth will ultimately increase water productivity, which can be seen from the presence of various types of biota and environmental improvements. The local community planted mangrove species (Sonneratia sp.) along the Progo River in an area of 75 h. This study aimed to: 1) assess the quality/characteristics of the Progo River waters that will be used for a water tourism center and 2) assess the suitability (IKW) of the Progo River waters for water tourism in Bleberan Hamlet. Data collection was carried out using nested sampling. Data analysis included the diversity of biota types using the Shannon Diversity Index and vegetation analysis. The results showed that the highest temperature occurred at station 3 plot 10, the highest mud thickness was observed at station 5 plot 9, the highest salinity was detected at station 3 plot 10, the highest water clarity was observed at station 2 plot 7, the highest pH was seen at station 1 plot 6 and 7, while the highest DO was spotted at station 3 plot 8. Some of the biota obtained included crustaceans, gastropods and actinopterygii. The habitat types of vegetation obtained were trees, shrubs, and some herbs. Based on the Tourism Suitability Index (IKW) value, there were 3 stations suitable for camping/outbound, 2 stations suitable for relaxing, and 2 stations suitable for river tracks.
The POTENTIAL OF Syzigium aromaticum L. TO CONTROL LEAF SPOT DISEASE (Cercospora capsici) IN CAYENNE PEPPER (Capsicum frutescens L.) Muliani, Yenny; Susanto, Dwi; Adviany, Ida; Nursinta, Neng Tita; Ustari, Debby
BIOTROPIA Vol. 32 No. 2 (2025): BIOTROPIA Vol. 32 No. 2 August 2025
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2025.32.2.2299

Abstract

Article Highlights: - In preliminary lab tests, clove leaf extract clearly slowed C. capsici growth.- Field trials assessed its potential to reduce leaf spot disease in cayenne pepper.- Applying concentrations above 15 g/L tended to lower the observed disease intensity.- The same concentration range was also linked to an increase in leaf number.- However, low field disease incidence limited detectable yield responses.Abstract:Cayenne pepper (Capsicum frutescens L.) is a spice plant that has good prospects for development in Indonesia because of its high market demand. There are several problems in increasing the production of this crop, one of which the plant diseases. One of the main diseases in cayenne pepper is leaf spot disease caused by the fungus Cercospora capsici (Heald & F.A. Wolf). Chemical pesticides can effectively control the disease but they have negative effects on the environments. Clove tree (Syzigium aromaticum L.) is usually cultivated for its dried clove buds that can be used for many other purposes. Besides, because of their contents, the leaves of clove tree have a potential to reduce the intensity of leaf spot disease. Therefore, the aims of the study were (1) to determine the effects of clove leaf extract on reducing the intensity of Cercospora capsici (Heald & F.A. Wolf) in cayenne pepper, and (2) to determine the effective concentration of the extract in reducing the intensity of the disease. The experiment used a randomized block design (RBD) with 5 treatments and 5 replications, namely: A = control (water only), B = 10 g clove leaf extract/L water, C = 15 g clove leaf extract/L water, D = 20 g clove leaf extract/L water, and E = 25 g clove leaf extract/L water. The results showed that the applications of leaf extract of Syzigium aromaticum L. could reduce the intensity of the leaf spot disease caused by Cercospora capsici, but the applications had no effect on the yield of the cayenne pepper. The ineffectiveness of treatments on the yield was deduced due to the lowness of the intensities of the disease in all treatments including the control.
INVASIVE ALIEN PLANT SPECIES IN THE RIPARIAN AREAS OF NORTHERN SAMAR, PHILIPPINES Abobo, Joey Liza; Esmabe, Joy; Baldoza, Marjurie; Cerbito, Princess; Garbo, John Mark; Bacayo, Ramon Philip; Tenedero, Chitlyn; Lameda, Maricar; Saavedra, Rica Joy; Turbanada, Cresil; Romeroso, Roanne
BIOTROPIA Vol. 32 No. 2 (2025): BIOTROPIA Vol. 32 No. 2 August 2025
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2025.32.2.2368

Abstract

ARTICLE HIGLIGHTS- A pioneering study of invasive alien plant species in the riparian areas of Northern Samar- Species composition, endemism, and conservation status of introduced species- Out of 65 introduced species, 32 were listed as invasiveABSTRACTRiparian areas are highly dynamic and naturally disturbed, making them particularly susceptible to invasion. Invasive Alien Plant Species (IAPS) are widely distributed in these areas due to the favorable environmental conditions that support their growth and persistence. This study is a pioneering effort to document the invasive alien plant species thriving in the riparian zones of Allen, Biri, Catarman, Gamay, Mapanas, Laoang, Lapinig, Las Navas, and Pambujan in Northern Samar. Sampling was conducted from March to December 2023. Six transect lines, each measuring two kilometers per site, were established in the riparian areas to identify existing invasive alien plants. In total, 60 transect lines were set up across all sampling areas. As a result, 65 introduced plant species belonging to 24 families and 56 genera were documented in the riparian areas of Northern Samar. The families with the highest number of species were Poaceae (13 spp.), Asteraceae (12 spp.), Cyperaceae, Fabaceae, and Lamiaceae (5 spp. each). The remaining families had fewer than five species each. The most common invasive plant species recorded was Psidium guajava L., which was present in all sampling areas. Based on life forms, the study identified two tree species, 17 shrubs, three vines, one epiphyte, and 42 herbs. Conservation status was determined using the latest IUCN and DENR listings (2017–11). One taxon was classified as Data Deficient, 32 as Least Concerned, and the remaining species as Not Evaluated. In contrast, no taxa were assessed in the DENR 2017–11 listing. Furthermore, of the 65 introduced plant species documented, 10 were recorded as invasive in the Global Invasive Species Database, while 22 were listed in the Global Register of Introduced and Invasive Species Database. Although invasive alien species have long been recognized as posing serious threats to human health, forestry, agriculture, fisheries, and natural biodiversity, no comprehensive assessment of their status, trends, causes, impacts, management, and governance issues has been conducted worldwide. Thus, this study aimed to supplement existing data on invasive plants and assist policymakers in developing policy frameworks for managing invasive alien plant species to mitigate their impacts on human health and the environment.

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