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1

Distribution of Macro Debris in Savu Sea Marine National Park (Kupang, Rote, and Ndana Beaches), East Nusa Tenggara, Indonesia

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Purba N. P., Ihsan Y. N., Faizal I., Handyman D. I. W., Widiastuti K. S., Mulyani P. G., Tefa M. F., Hilmi M.

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vol. 21

64-76

EN

Marine debris has emerged as a global issue that poses risk to environment systems. This study aimed to investigate the distribution of marine debris in Savu Sea Marine National Park, particularly in Kupang City, Rote Island, and Ndana Island (which are transboundary islands in the Australian and the Indian Ocean). Six beaches were assessed on this study, which comprised of total 12 transects. Debris collected from sampling sites weighed 52.14 kg, with abundance 4.447 ± 1.131 kg/m2 and 215.417 ± 35.609 item/m2. Most debris pieces were accumulated on high tide line and the area that many residents passed through. In terms of type, food wrapper and plastic bag dominated the debris composition due to their occurrence in every transect. It is strongly suggested that beached debris in Kupang and Rote was sourced from the population activities, whereas in Ndana was transported from other places via ocean currents.

2

The Relationship between Benthic Macrofauna Community Structure and Density of Mangrove Vegetation in Mempawah Mangrove Park, West Kalimantan, Indonesia

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Noviatri S. E., Zahidah Z., Herawati H., Dewanti L. P.

World News of Natural Sciences

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2020

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vol. 33

38-47

EN

This research was conducted in Mempawah Mangrove Park, West Kalimantan on July – August 2018. The research aims to map the benthic macrofauna community structure and its relationship with the structure of mangrove vegetation. The research method was a survey and use purposive sampling data method in observation stations based on different stages of mangrove vegetation. The observation stations consists of Avicennia marina and Rhizophora stylosa as the species of mangroves. Station 1 consists of mangroves in seedling size, station 2 consists of mangroves in pole size, and station 3 consists of mangrove trees. The benthic macrofauna consist of 8 species from 3 different classes, merostomata, malacostraca, and gastropods. The highest abundance value (155 ind/m2), diversity index (1,875) and similarity index (0,668) is in station 2. The relationship between benthic macrofauna abundance and mangrove density has -0,356 as the correlation coefficient which indicates that an increase of benthic macrofauna abundance is in line with the decrease of mangrove density. High density value in research shows that the mangrove is in seedling size, and vice versa a low density value indicates the mangrove trees. The coefficient of determination (0,1272) indicating that the abundance of benthic macrofauna is affected by the mangrove density as 12,72% and 87,28% affected by other factors.

3

Seasonal Variations of Sea Surface Temperature and Sea Current in the Celebes Sea

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Hapsari S. N., Syamsuddin M. L., Riyantini I., Sunarto S.

World News of Natural Sciences

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2021

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vol. 35

135-143

EN

The waters of the Celebes Sea are an area that has quite complex dynamics because it is influenced by several factors, either regionally or globally. This influence certainly has an impact on variations in oceanographic conditions in waters such as Sea Surface Temperature (SST) and sea currents. Currently, there are many observations of oceanographic data, one of which is by using remote sensing methods. The purpose of this study was to determine the seasonal variations in sea surface temperature and sea surface currents in the Celebes Sea using a remote sensing system in a time series for 5 years (2014-2018). The results of this study indicate data on seasonal variation of SST and sea surface currents have an average maximum SST value for 5 years occurring in the eastern season and the second transitional season (May, June, July) with an average value range of 30.6 °C - 31.1 °C and the average maximum sea current velocity for 5 years occurs in the western monsoon with a value range of 0.72 m/s - 0.77 m/s. The high SST value and sea current velocity are caused by the influence of the season which causes variations in the ongoing rainfall, also presumably due to the opposite direction between the monsoon wind and the direction of the main current flowing in the Celebes Sea.

4

Analysis of Shoreline Changes in the Coastal Area of Kuala Terengganu, Malaysia

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Subiyanto S., Ahmad A., Mamat M., Ihsan Y. N., Afrianto E., Hidayat Y., Supian S.

World News of Natural Sciences

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2020

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vol. 28

24-33

EN

The analysis of shoreline change trends is fundamental to a broad range of investigations undertaken by coastal scientists, coastal engineers, and coastal managers, as well as the government, in this case, the coastal development policy-maker. In order to know the changing of shoreline position around the coastal area of Kuala Terengganu, an analysis and then simulation of shoreline change was performed over, respectively, 2 years, 3 years and 4 years. In this simulation, the longshore distance was divided into 87 cells of length 34 m. Shoreline positions from satellite imagery in 2010 were used in this simulation as the initial condition. Based on the numerical result, both erosion (north side) and accretion (south side) occurred around the Sultan Mahmud Airport, Kuala Terengganu. The average erosion and accretion during the 4 year period is 42.93 m and 40.89 m, respectively.

5

Seasonal Distribution of Benthic Foraminifera in Pangandaran Waters, Indonesia

100%

Yuliadi L. P. S., Nurruhwati I., Astuty S.

World News of Natural Sciences

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2020

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vol. 29

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issue 3

225-239

EN

The rapid development of tourism in Pangandaran causes various problems such as environmental degradation, environmental pollution and waste problems. Environmental changes can be detected using the foraminifera community. The reasearch aims to analyze seasonal distribution of foraminifera in Pangandaran waters. This research uses the survey method and descriptive data analysis. Ecological factors (salinity, temperature, sediment, depth, pH, DO, clarity, waves and currents) have affected their distribution. Temperature values ranged between 26 to 30 ºC. Salinity values ranged between 15.6 to 31 ‰. The pH ranged from 5.47 to 8.75. The DO concentration varied between 5.43 and 9.7 ppm. The average clarity of Pangandaran waters in the west season ranges from 56 to 104.5 cm. In Pangandaran waters, the abundance of the Rotaliina sub-order reaches between 75% to 86.5%, Miliolina 11.6% to 19%, and Textulariina 0.05% to 13.4%.

6

The condition of seagrass meadow in the waters of Kelapa Dua Island, Seribu Islands, Jakarta, Indonesia

100%

Harahap S. A., Prihadi D. J., Gussaoki R. A.

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vol. 44

215-230

EN

Seagrass is a higher-level plant that can live immersed in water in the aquatic environment near the coast. Seagrass colonies form a seagrass ecosystem that functions as a support in coastal waters which is strongly influenced by processes that occur in the sea and land. This ecosystem has a function as a primary producer, a recycler of nutrients, and a stabilizer of the bottom of the waters, as a habitat for biota, a place for spawning, a place for nurturing and foraging for various marine biota, and can protect the coast from the erosion process because it functions as a wave absorber and traps sediments. The field survey was conducted in April 2014 for seagrass observations and measurement of water condition parameters. The purpose of this study was to determine the types and conditions of seagrass on Kelapa Dua Island. The quadrant transect method was applied to seagrass observations carried out at 3 stations with each station consisting of 9 1m × 1m quadrant transect plots, then analyzed using a descriptive-quantitative approach. The results of the measurement of water quality parameters in the form of temperature ranged from 30.30 – 32.60 °C, the salinity of the waters in this study was in the range of 31.70 – 35.70‰. The pH value ranges from 7.40 – 7.75. DO levels ranged from 6.30 – 6.90 mg·L-1. The nutrients in the form of N and P were in the range of 1.19 - 1.79 mg·L-1 and 0.22 - 0.25 mgL-1, respectively. Meanwhile, seagrass observations found three types of seagrass, namely H. uninervis, T. hemperichii, and H. ovalis. The lowest percentage of seagrass cover was at station 1, which was 7.8% and the highest was at station 2, which was 36.11% with a diversity index ranging from zero to 0.94. The type of sediment at the research site has the characteristics of gravel sand.

7

Suitability Study for Tourism Sites in the Southern Coast of West Java

100%

Ramdhani F., Liyantono L., Pramono G., Faizal I.

World News of Natural Sciences

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2021

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vol. 34

127-143

EN

Diversity of tourist attraction of the regencies/cities in West Java provides an alternative for travellers. One of the potential activity that can be utilized is coastal tourism. The main objective of this research was to provide a suitable site for tourism sites which can be used as a guide for government, private and planners to decide for the development of coastal tourism. Furthermore, visitors can use this application to get information about the beach resources—primary data in tabular data form and secondary data in vector format and satellite imagery format. ArcGIS was used for spatial analysis of thematic. Simple Additive Weighting method was used in this research to rank the factors and to calculate the weight in each factor. This method was commonly used for resolving spatial decision-making problems. The decision-maker directly assigns a weight of relative importance to each factor. There were 32 beach sites visited in the survey with 20 sites of suitable category and 12 sites belonging to a very suitable category. Pangandaran Regency has the most beach site at ten beaches (32.5%), consisting of 7 sites of suitable category and three sites of very suitable category. They are followed by Sukabumi which has nine sites, consisting of 7 sites of suitable category and two sites of very suitable category. The least number of sites were found in Cianjur regency, which only has three sites, consisting of 1 suitable site and two very suitable sites. According to the result, it can be seen that tourism was more developed in Pangandaran and Sukabumi regency. Besides the infrastructure support, natural conditions also influence the development of coastal tourism in the area.

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Distribution of Macro Debris in Savu Sea Marine National Park (Kupang, Rote, and Ndana Beaches), East Nusa Tenggara, Indonesia

The Relationship between Benthic Macrofauna Community Structure and Density of Mangrove Vegetation in Mempawah Mangrove Park, West Kalimantan, Indonesia

Seasonal Variations of Sea Surface Temperature and Sea Current in the Celebes Sea

Analysis of Shoreline Changes in the Coastal Area of Kuala Terengganu, Malaysia

Seasonal Distribution of Benthic Foraminifera in Pangandaran Waters, Indonesia

The condition of seagrass meadow in the waters of Kelapa Dua Island, Seribu Islands, Jakarta, Indonesia

Suitability Study for Tourism Sites in the Southern Coast of West Java