Rhizopora Apiculata Research Articles

PLANTING OF RHIZOPORA TYPES IN MANGROVE FORESTS PERCUT SEI TUAN NORTH SUMATERA

Mangrove forest is a tropical beach vegetation community dominated by several tree species that can grow and develop in tidal and muddy beaches. Some mangrove areas recently have been damaged due to illegal activities carried out by various parties, one of which is the East Coast of Sumatra in the Sub District Percut Sei Tuan, Deli Serdang District, Province of North Sumatra. The purpose of the activities is to focus on replanting mangrove lands that have been damaged by local species. The growned in Tanjung Rejo Village Percut Sei Tuan buds are like Rhizopora stylosa, Rhizopora apiculata and Avicennia marina type. Percentage of growing plants were R. stylosa (92.37%), R. apiculata (90%), mixed propagules of R. stylosa and R. apiculata (90%) and A. marina (56%) respectively. Overall the rehabilitation of mangrove forest is categorized as successful, but only one species of the smallest growing with percentage is A. marina (56%) this is because the location of planting is adjacent to the sea where the plants can not stand the tidal currents.

The Effect On Mangrove Density With Sediment Rate in Coastal Pasar Banggi Of Rembang Regency

The existence of mangrove ecosystems in coastal Pasar Banggi serves to protect the shoreline and wildlife habitat as fishing for spawning, nursery, and feeding ground. In addition, mangrove ecosystems can also grab sediments through the root system forming new land. The formation of the new land can eventually be utilized for mangrove growth media either naturally or through the planting activities to support the sustainability of mangrove ecosystems. The method used is vegetation analysis and sediment trap. The results showed that the dominant mangrove species in Coastal Pasar Banggi Rembang were Rhizopora apiculata. The results showed the average value of the highest sedimentation rate at station A 291,479 gr/cm2/day with the lowest average mangrove density of 57822 ind/ha. The lowest average sedimentation rate at station B was 171,095 gr/cm2/day with the highest average mangrove density of 105311 ind/ha, mean medium sedimentation rate at station C was 219,461 gr/cm2/ day with average medium mangrove density of 888089 ind/ha. This research is expected to be an information material about the rate of sedimentation which will be expected as a mangrove conservation management. Based on the results of the research, the relationship between mangrove density and sedimentation rate resulted in negative correlation (-1) meaning that the lower of mangrove density, the higher the sedimentation rate and the higher the mangrove density, the lower the sedimentation rate

Composition and Structure of Tiwoho Mangrove Vegetation at Bunaken National Parkional Park (Komposisi Dan Struktur Vegetasi Mangrove Tiwoho di Kawasan Taman Nasional Bunaken)

Tiwoho mangrove forest islocated in north coast of North Sulawesi province.This area functions as life buffer system for community and sustainability of Bunaken National Park. Due to the important and strategic roles of mangrove in protection and ecological functions, therefore, it is needed to know scientific information about mangrove population dynamics. This research aims to know the vegetation composition and structure vegetation of Tiwoho mangrove forest. Data collection used 20x20 m sample plots that were sistematically laid from the sea to the land side up to the highest tidal line. Distance between plots along 25 m. Results showed that at tree level Sonneratia alba had the highest Important Value Index (IVI) of 206,88 % and Brugueira sp of 46,06 %. Although Rhizopora apiculata value is lower than Brugueira sp. But the values of relative frequency of these species are almost similar. It means that both species are frequently found in observation plots. Rhizophora apiculata dominate at pole and sapling levels, but frequency of occurance this species is lower than Brugueira sp in pole level.

Composition and Structure of Tiwoho Mangrove Vegetation at Bunaken National Parkional Park

Tiwoho mangrove forest islocated in north coast of North Sulawesi province.This area functions as life buffer system for community and sustainability of Bunaken National Park. Due to the important and strategic roles of mangrove in protection and ecological functions, therefore, it is needed to know scientific information about mangrove population dynamics. This research aims to know the vegetation composition and structure vegetation of Tiwoho mangrove forest. Data collection used 20x20 m sample plots that were sistematically laid from the sea to the land side up to the highest tidal line. Distance between plots along 25 m. Results showed that at tree level Sonneratia alba had the highest Important Value Index (IVI) of 206,88 % and Brugueira sp of 46,06 %. Although Rhizopora apiculata value is lower than Brugueira sp. But the values of relative frequency of these species are almost similar. It means that both species are frequently found in observation plots. Rhizophora apiculata dominate at pole and sapling levels, but frequency of occurance this species is lower than Brugueira sp in pole level.

Acid corrosion inhibition of copper by mangrove tannin

PurposeThe purpose of this paper is to evaluate the corrosion inhibition potential of mangrove (Rhizopora apiculata) tannin in hydrochloric acid medium on copper with the view of developing a natural corrosion inhibitor.Design/methodology/approachThe mangrove tannin was extracted from the mangrove bark and its anticorrosion potential was studied by weight loss, electrochemical and scanning electron microscopy (SEM) analysis.FindingsIt has been found that the mangrove tannin effectively inhibits the corrosion on copper metal in hydrochloric acid solution. The results of the electrochemical and weight loss methods showed that the inhibition efficiency of mangrove tannin increases with increasing its concentration. Inhibition is achieved through the adsorption of tannin molecules onto the copper surface and the adsorption follows the Langmuir adsorption isotherm model. SEM study also supports the adsorption of the inhibitor molecules onto the copper surface.Originality/valueIn this paper, mangrove tannin has been studied for the first time as a potential copper corrosion inhibitor in hydrochloric acid medium. The anticorrosion effect of tannin has been proven by standard methods. This natural inhibitor could find use in industries where copper is used as a fabrication metal.

Metode Penyimpanan Semai Bakau (Rhizopora apiculata) dengan berbagai kondisi tempat dan Media simpan serat bahan penghambat pertumbuhan

Bakau (Rhizopora apiculata(, one of the species of mangrove, is well known for having true recalcitrat seeds, since they tend to have very short-life cycle. Hence they cannot be stored a long time. Developing improved methods for retarding seedling growth of tropical mangrove is necessary to successfully control growth rates during long-term storage. The aim of the research is to identify the influence of growth inhibitors used were paclobutrazol (250 ppm), NaCl (0,5 %) and aquadest (as a control). The condition for the storage consists of heavy (650 lux), moderate (8935 lux) and light (17593 lux) shadings. The media used including the mixture of sand. A completely randomized design was arranged in a factorial experiment. The results showed that the use of paclobutrazol (250 ppm) was very effective to suppress the growth height of the seedlings. The storage condition of light shading with the intensity of the day-light and the highest temperatur (L.I= ±17593 lux, T= ±35 0 C) could reduced the speed of seedling growth during storage for 6 months supported by the use of sand as media. Such conditions gave a seedling survival of 98,33%

PRODUKSI SERASAH (GUGURAN DAUN) PADA BERBAGAI JENIS MANGROVE DI BANGKALAN

This research was conducted on July to September 2009. Mangrove litterfall were trapped with 30 litter traps which were plotted under mangrove canopy 1.5 m above the ground, hence the traps were avoided from tide. In this research, we use Rhizopora mucronata, Rhizopora apiculata and Bruguera sp. 10 litter traps were used on each species. Litter traps were made from polyetilen with size of 1x1x0,5 m 3 . Mangrove litterfall were collected every two weeks for 3 months. The production rate of mangrove litterfall in Bangkalan were 4.08-18.38 g/tree/day. The fastest production rate of mangrove litterfall was found on Rhizopora mucronata with 64.56%, followed by Rhizopora apiculata and Brugueira sp with 24.32% and 11.12%, respectively. Key Words : mangrove litterfall, Bangkalan, Rhizopora