Abstract. Baderan DWK, Hamidun MS, Utina R, Rahim S, Dali R. 2019. The abundance and diversity of Mollusks in mangrove ecosystem at coastal area of North Sulawesi, Indonesia. Biodiversitas 20: 987-993. The study reported in this paper sought to analyze the abundance and diversity of Mollusks species in the coastal mangrove areas of Panango in North Sulawesi, Indonesia. Data collected in the study lent support to policy making in reducing the loss of marine biotic species in the coastal mangrove areas. Data collection used stratified-random sampling method (plot size was 10 m x 10 m) with three plots at each research station was used. Data analyzed by Odum formula for abundance, Shannon Wiener index for diversity and evenness index for evenness. The samples were collected from 2 research station covering 15 sampling sites. This research found 14 families of mollusks comprised of 11 gastropod families (21 species) and bivalve families (3 types). The highest of the relative density was found in Terebralia sp (24,24%), and the lowest relative density was obtained (1,52%) in the following species: Spondylus violaceus, Conus sp., Semiricinula turbinoides, and Faunus ater. The diversity index of mollusks species (Gastropoda and Bivalvia) at the observation station was classified as a high category, indicating by H’ >3,32 (Station I H’= 2,19 and Station II H’= 2,12). The evenness value in range 0,4<e<0,6. This indicates that the Mollusks species found in the research site had a medium amount. This study suggests a need to regulate mangrove areas of Panango for sustainable mangrove ecosystems management.

Bivalvia dan Polyplacophora menjadi salah satu dari beragam sumber daya hayati yang dimanfaatkan oleh sebagian besar masyarakat Indonesia baik secara lokal maupun dalam skala besar sejak dulu. Meskipun demikian, data dasar terkait pola distribusi maupun keanekaragaman Bivalvia dan Polyplacophora masih sangat terbatas, bahkan jika dibuat perbandingan dengan Kelas Gastropoda yang kerabat dekatnya.. Tujuan penelitian ini: 1) untuk mengetahui komposisi jenis Bivalvia dan Polyplacophora; 2) mengetahui nilai Indeks Keanekaragaman, Kemerataan dan kekayaan Jenis; dan 3) nilai kepadatan. Metode yang digunakan adalah metode jelajah. Penelitian ini menemukan enam spesies Bivalvia dan Polyplacophora yakni Hippopus hippopus, Mactra cuneata, Anadara antiquata, Tucetona pectunculus, Pinctada margaritifera dan Achantopleura gemmata. Tingkat keanekaragaman tertinggi berada pada stasiun I dengan nilai H'=1,641. Indeks kemerataan (E) Bivalvia dan Polyplacophora secara berurut pada stasiun I, II, dan III yakni 0,916; 0,821; 0,9. Indeks kekayaan jenis Bivalvia dan Polyplacophora dimana stasiun I berjumlah 1,3294, stasiun II berjumlah 1,6981 dan stasiun III berjumlah 1,5533. Nilai kepadatan tertinggi dimiliki oleh spesies Hippopus hippopus pada stasiun I yakni 0,0008 Ind/m2. Spesies dengan nilai kepadatan terendah yakni tiga spesies (Anadara antquata, Tucetona penctuculus dan Achantopleura gemmate) pada stasiun II, dan  spesies Tucetona penctuculus pada stasiun III dengan nilai kepadatan masing-masing sebesar 0,00004 Ind/m2.

Abstract. Baderan DWK, Aydalina RV, Hamidun MS. 2023. Morphological characteristics and biodiversity of mudskipper fish (Periophthalmus: Gobiidae) in mangrove ecosystem of coastal Bay of Tomini, Gorontalo Province, Indonesia. Biodiversitas 24: 498-507. The southern sea area of Gorontalo Province is part of Tomini bay, the biggest bay in Indonesia. This area has a unique biodiversity and is Sulawesi endemic. The mangrove forest in the coastal bay of Tomini Boalemo is one of the habitats for flora and fauna, a place for spawning, nurturing, and food hunting for fish. The mudskipper is a fish that lives in the mangrove area. This study aims to reveal the morphological characteristics and biodiversity of mudskipper (Periophthalmus: Gobiidae) in the ecosystem of Tomini Boalemo coastal bay of Gorontalo Province. This study employed a quantitative descriptive that also implemented purposive sampling as the sampling method in three ecosystem stations of Tomini Boalemo coastal bay (Dulupi, Bajo, and East Pentadu mangrove). The mudskippers were collected manually when the water was receding using a fish net. The sample which had been collected were then identified based on 22 morphological, 24 morphometric, and seven meristic characteristics. The identification results were then compared with the identification key. The mudskippers' species were then analyzed to determine the species' biodiversity (diversity, evenness, species richness, and dominance indexes). The research result revealed five species from Periophthalmus Genus: Periophthalmus argentilineatus, Periophthalmus kalolo, Periophthalmus malaccensis, Periophthalmus minutus, Periophthalmus variabilis, with total individuals 561. The score of H?: 1.09 showed that the diversity of mudskipper fish was categorized as medium. The evenness index was 0.99 obtained from 3 observation stations, while the lowest dominance index was on station II with a score of 0.34, and the score of R1 in each station was respectively (0.19); (0.36); and (0.2). The results of this study could be used as a database for the sustainable management of Tomini Bay to tackle the threats of species extinction through aquatic life protection and preservation to arrange the natural balance and support the availability of the coastal resource for future generations.

Abstrak. Baderan DWK, Hamidun MS, Lamangandjo C, Retnowati Y. 2015. Diversifikasi produk olahan buah mangrove sebagai sumber pangan alternatif masyarakat pesisir Toroseaje, Kabupaten Pohuwato,. Hutan mangrove di wilayah pesisir Toroseaje yang berfungsi sebagai daerah penyangga Teluk Tomini, saat ini terus mengalami tekanan akibat aktivitas manusia yang melampaui daya dukungnya. Hutan mangrove sangat penting karena secara ekologis berfungsi sebagai tempat mencari makan (feeding ground), tempat memijah (spawning ground), dan tempat berkembang biak (nursery ground) berbagai jenis ikan, udang, dan biota laut lainnya. Selain itu, hutan mangrove juga memiliki fungsi ekonomi karena buah mangrove dapat dijadikan sebagai sumber pangan alternatif pengganti beras. Beras merupakan komoditas utama bangsa Indonesia. Dipakainya beras sebagai indikator pangan utama telah mematikan posisi pangan lokal yang menghasilkan berbagai masakan Nusantara. Masyarakat pesisir Toroseaje belum mengetahui bahwa buah mangrove yang terbuang percuma ke lingkungan dapat diolah menjadi berbagai makanan pengganti beras. Dengan memanfaatkan buah mangrove tujuan yang ingin dicapai yakni merubah paradigma masyarakat pesisir Toroseaje yang menyatakan bahwa beras adalah satu-satunya makanan pokok. Metode yang digunakan yakni metode survey dengan pendekatan kualitatif. Data yang digunakan berupa data sekunder dan primer yang dapat diperoleh di lapangan dan studi literatur. Hasil penelitian ini menghasilkan enam produk unggulan, yakni pia apapi, dodol munto, stik manis munto, stik asin munto, kerupuk soneratia, tepung munto, dan tiga produk tambahan, yakni cake munto, kue agar-agar munto, dan kacang keong munto. Sembilan produk pangan bersumber dari tiga spesies mangrove, yakni spesies Avicennia alba (apapi), Bruguiera gymnorrhiza (munto), dan Sonneratia alba. Kata kunci: Diversifikasi, mangrove, pangan alternatif Abstract. Baderan DWK, Hamidun MS, Lamangandjo C, Retnowati Y. 2015. Diversification of mangrove fruit-based products as an alternative food source in Toroseaje coastal communities, Pohuwato District, Gorontalo. Pros Sem Nas Masy Biodiv Indon 1 (2): 347-351.Mangrove forests in the Toroseaje coastal area serving as a buffer zone of Tomini Bay is continuously pressured by anthropogenic activities beyond its carrying capacity. Mangrove forest is ecologically important, as it serves as foraging/feeding ground, spawning ground, and breeding/nursery grounds of fishes, shrimps and other marine organisms which many of them are economically important species. Human may also benefits from mangrove forests as it produces fruits that can be utilized as alternative food sources replacing rice. The nationally popular consumption rice has been overrunning potential use of local food resources, such mangrove fruits. Coastal communities in Toroseaje have not been aware that mangrove fruits can be processed into a variety of food. The development of mangrove fruit-based food is aimed to diversify food sources of Toroseaje communities, relieving the community from...

Keanekaragaman dapat terjadi karena adanya perbedaan warna, ukuran, bentuk, jumlah, tekstur dan penampilan. Penelitian ini bertujuan untuk mengetahui indeks keanekaragaman tumbuhan yang berada di kampus Universitas Negeri Gorontalo. Metode yang digunakan pada penelitian ini adalah survey eksplorasi dan teknik pengumpulan data menggunakan teknik jelajah. Hasil penelitian ditemukan sebanyak 35 spesies tumbuhan dimana jumlah individu terbanyak pada kategoti pohon adalah Swietenia mahagoni sebanyak 162 individui, kategori pancang Ilex opaca sebanyak 102 individu dan kategori tumbuhan bawah terbanyak adalah Cistopteris fragilis sebanyak 98 individu. Nilai indeks keanekaragaman keseluruhan tumbuhan adalah H’= 3.11 nilai ini termasuk dalam kategori tinggi.