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Anita Costanci Christine Tengker
Universitas Negeri Manado
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Identification of Mangrove Zonation in Sondaken Village, Bunaken National Park Area Michellia Pamela Sanggor; Mercy Maggy Franky Rampengan; Helen Joan Lawalata; Anita Costanci Christine Tengker; Rievo Handry Djarang
Advances in Tropical Biodiversity and Environmental Sciences Vol. 8 No. 1 (2024): February 2024: Pages 1-57
Publisher : Institute for Research and Community Services Udayana University (LP2M Universitas Udayana)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/ATBES.2024.v08.i01.p02

Abstract

Sondaken Village has three mangrove zones, each with its own type of plant. The first zone, facing directly towards the sea, is dominated by Avicennia sp. The second zone, in the middle, is characterized by Rizophora sp. The third zone, closer to the land, is predominantly Bruguiera sp. Mangroves have different levels of growth, including seedling level, stake level, pole level, and tree level. The purpose of this study was to determine the types and growth levels of mangroves within its zonation in Sondaken Village, which is part of Bunaken National Park Area. This was done using exploratory and descriptive survey methods, by creating 3 plots in each zone from the edge to the center, with sizes of 10x10 m2, 5x5 m2, and 2x2 m2. The research found that mangrove in Sondaken Village consist of Avicennia sp, Rizophora sp, and Bruguiera sp, with the number of individuals per species being 124, 133, and 113 individuals respectively. Each type of mangrove has different growth levels and numbers.
CHARACTERISTICS OF TURTLE NESTING HABITAT ON POPARENG BEACH, TATAPAAN DISTRICT, SOUTH MINAHASA REGENCY, BUNAKEN NATIONAL PARK AREA Mukuan, Randi; Lawalata, Helen; Tengker, Anita; Setyawati, Iriani; Mege, Revolson Alexius
Indonesian Biodiversity Journal Vol. 6 No. 2 (2025): August 2025
Publisher : Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/mbaj0069

Abstract

Turtles They are among the world's protected animals and one of the rare, almost extinct species. The preservation of their habitat and knowledge of the traits of turtle-friendly habitats are two ways that the rescue and protection of these turtles must go on. For rescue operations, turtle sustainability, and sustainable coastal management, research is being conducted on the features of the turtle nesting habitats on Popareng Beach. This research aims to determine the characteristics of turtle nesting habitats and identify the parameters that hinder turtles from nesting at Popareng Beach, Tatapaan District, South Minahasa Regency. The method used in this research is the descriptive-exploratory method. With characteristic parameters consisting of beach width measurement, beach slope, sand temperature, sand humidity, sand texture, beach vegetation, and the presence of predators. From the research results, it shows that station 1 and station 2 have results that are suitable for turtle nesting habitats, with values obtained at station 1 being 88.33% and station 2 being 92%. Meanwhile, at station 3, with an evaluation score of 72%, it is considered fairly suitable and the station has tolerable limitations.
CHARACTERISTICS OF TURTLE NESTING HABITAT ON POPARENG BEACH, TATAPAAN DISTRICT, SOUTH MINAHASA REGENCY, BUNAKEN NATIONAL PARK AREA Mukuan, Randi; Lawalata, Helen; Tengker, Anita; Setyawati, Iriani; Mege, Revolson Alexius
Indonesian Biodiversity Journal Vol. 6 No. 2 (2025): August 2025
Publisher : Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/mbaj0069

Abstract

Turtles They are among the world's protected animals and one of the rare, almost extinct species. The preservation of their habitat and knowledge of the traits of turtle-friendly habitats are two ways that the rescue and protection of these turtles must go on. For rescue operations, turtle sustainability, and sustainable coastal management, research is being conducted on the features of the turtle nesting habitats on Popareng Beach. This research aims to determine the characteristics of turtle nesting habitats and identify the parameters that hinder turtles from nesting at Popareng Beach, Tatapaan District, South Minahasa Regency. The method used in this research is the descriptive-exploratory method. With characteristic parameters consisting of beach width measurement, beach slope, sand temperature, sand humidity, sand texture, beach vegetation, and the presence of predators. From the research results, it shows that station 1 and station 2 have results that are suitable for turtle nesting habitats, with values obtained at station 1 being 88.33% and station 2 being 92%. Meanwhile, at station 3, with an evaluation score of 72%, it is considered fairly suitable and the station has tolerable limitations.
Identification of Endophytic Bacteria from Water Hyacinth (Eichhornia crassipes) in Lake Tondano as Potential Agents for Lead Bioremediation Worang, Margi; Lawalata, Helen J.; Tengker, Anita; Roring, Verawati; Posumah, Dany; Rampengan, Mercy
Advances in Tropical Biodiversity and Environmental Sciences Vol. 10 No. 1 (2026): February 2026 (in progress)
Publisher : Institute for Research and Community Services Udayana University (LP2M Universitas Udayana)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/ATBES.2026.v10.i01.p04

Abstract

Water hyacinth (Eichhornia crassipes) is a herbaceous plant known to accumulate heavy metals from polluted waters. In Lake Tondano, this plant grows abundantly and helps reduce lead (Pb) levels through bioremediation. This study aimed to identify the genera of endophytic bacteria from water hyacinth (E. crassipes) that have potential as bioremediation agents for lead. This study employed an exploratory, descriptive, quantitative laboratory approach. Samples were collected from E. crassipes plants found in Lake Tondano at three different locations. The isolation method used was direct plating. The research stages included bacterial isolation, lead resistance testing at 50 ppm, lead reduction testing at 10, 20, and 30 ppm, lead concentration analysis, and bacterial identification using morphological and biochemical tests. Three isolates (EG.A1.5, EG.A2.4, and EG.D3.4) were found to be resistant and capable of reducing lead levels. The reduction percentages reached 35.9%, 72.2%, and 55.5%, respectively. Based on morphological and biochemical characteristics, the bacterial genera of three isolates were identified as Salmonella, Enterobacter, and Bacillus.
Co-Authors Christny Ferdina Evie Rompas Dany Posumah Debby Jacqualine Jochebed Rayer Dina Munawaroh Dino Rahardiyan Emma M Moko Femmy Nurul Akbar Ferni Margo Tumbel Helen Joan Lawalata Hentje H. Umbunan Herry Maurits Sumampouw Iriani Setyawati Jacklin Stella Salome Manoppo Jantje Ngangi Kyrie Eleison Ruata Lady Grace Jane Giroth Lawalata, Helen Lawalata, Helen J. Livana Dethris Rawung Maiko Polandos Mamuaya, Tripena Maradesa, Sartika Marchelle Nhatanael Walangitan Marsanda Tandiapa Mercy Maggy Franky Rampengan Michellia Pamela Sanggor Mokosuli Yermia Samuel Mukuan, Randi Nivensia Geby Maramis Orbanus Naharia Pai'pin, Rati Yani Pelealu, Irna W. Posumah, Danny Rampengan, Mercy Rampengan, Mercy Maggy Franky Revolson Mege Rievo Handry Djarang Roring, Verawati Rotty, Viktory Nicodemus Joufree Runtunuwu, Yudistira Deyvan Sakul, Ernest Hanny Tiersa Reinie Undap Verawati I.Y. Roring Wiesye Nangoy Willem, Alfiani Worang, Margi