Struktur Vegetasi Mangrove dan Produksi Serasah Mangrove Sonneratia alba di Telaga Wasti Kabupaten Manokwari, Papua Barat

Abstract

The productivity of mangrove litterfall is the most important part of the transfer of organic materials from mangrove vegetation into the waters and soils. This research was conducted in July-August 2021 in three stations on mangrove ecosystem at Wasti Lake, Manokwari Regency. The purpose of this study was to determine the mangrove vegetation, litterfall production of Sonneratia alba, relation of Diameter at Breast High with litterfall production, and physical chemistry of the environment. The quadrant transect was used to sample mangrove vegetation and the litter trap to measure litter production. The results showed 5 types of mangroves, namely Sonneratia alba, Rhizophora stylosa, Rhizophora apiculata, Bruguiera gymnorrhiza, and Bruguiera sexangua. The highest density values ​​at each station was Sonneratia alba, namely 360 ind/ha, 540 ind/ha and 520 ind/ha with important value indexes are 268.08%, 255.59%, and 247.96%. The total litterfall production of Sonneratia alba during a period of 28 days was 79.19 gr/m². The highest litter contribution components came from leaves (87.6%), twigs (8.1%), and flowers (4.3%). Correlation and regression analysis showed a very strong positive relationship between DBH and litter production. The environmental parameter values ​​for DO ranged from 6.2-8.4 mg/L, water temperature 28.7 – 35.6⁰C, pH ranged from 7.06 – 7.47, salinity 25 – 27.5, substrate pH 6.1 – 6.3, the air temperature is 29-32⁰C, and the humidity is 70-80%.

Zooplankton Sebagai Bioindikator Lingkungan Perairan: Studi Kasus Perairan Teluk Doreri Manokwari, Provinsi Papua Barat

“…Komponen dari ketiga kelompok biota tersebut banyak digunakan sebagai biondikator lingkungan perairan. Beberapa penelitian komponen biota tersebut yang telah dilakukan di teluk Doreri adalah tentang reduser (Tururaja & Mogea, 2010), produsen (Elungan et al, 2022;Warnetti et al, 2020;Alianto, et al, 2020) konsumen (Pattipelohy et al, 2020;Marani et al, 2022). Penelitian yang telah dilakukan tersebut masih merupakan penelitian kualitatif yang memberikan informasi jenis serta kelimpahan.…”

Pre-Treatments of Sonneratia Alba Fruit as The Potential Feed for Ruminant Using Aspergillus Niger at Different Fermentation Times: Tannin Concentration, Enzyme Activity and Total Colonies

“…Sonneratia alba is a mangrove plant found in coastal areas (Wintah et al 2021). This plant grows in confluence areas between rivers and estuaries or muddy bays that have total litterfall production about 79.19gm/m 2 in 28 days (Rusianti et al 2022). S. alba trees can produce fruit in two fruiting periods: April to June and September to November (Sahromi 2011).…”