scholarly journals Diversity and distribution of microalgae in coastal areas of East Java, Indonesia

2020 ◽  
Vol 21 (3) ◽  
Author(s):  
UMI ZAKIYAH ◽  
MULYANTO ◽  
LUCIA TRI SUWANTI ◽  
MOCHAMAD DONNY KOERNIAWAN ◽  
EKO AGUS SUYONO ◽  
...  
Keyword(s):  
Human Activities ◽  
Diversity Index ◽  
Renewable Energy Sources ◽  
Biodiversity Loss ◽  
Coastal Areas ◽  
South Coast ◽  
North Coast ◽  
The North ◽  
Anthropogenic Development ◽  
North And South

Abstract. Zakiyah U, Mulyanto, Suwanti LT, Koerniawan MD, Suyono EA, Budiman A, Siregar UJ. 2020. Diversity and distribution of microalgae in coastal areas of East Java, Indonesia. Biodiversitas 21: 1149-1159. Indonesia is well known as one of hotspot for biodiversity, including marine resources. However, Indonesia biodiversity has declined rapidly due to the changes in the aquatic environmental quality as the consequence of human activities. Biodiversity loss has been well studied in larger organisms, however, less is known for microorganisms, such as microalgae. Microalgae have received much attention recently due to its potential as renewable energy sources. This study aimed at describing biodiversity and distribution of microalgae in coastal areas of East Java and Madura, Indonesia. Six sites, i.e. Trenggalek and Sendangbiru representing south coast, Banyuwangi and Situbondo representing north coast of East Java, Pasongsongan and Pamekasan representing Madura north and south coast, respectively were sampled, which representing different background of anthropogenic development in these areas. Results showed that seawater condition in all sites is still good, with average pH 8.0 despite intense human activities, such as ecotourism, fishing and boat harbor, as well as residential area that has the potential to produce a lot of waste. Totally, there were 35 genera from all locations with varying abundance in each location and diversity index ranging from 1.105-3.312. Although most genera belonged to Bacyllariophyta, domination indices showed that there was not any single specific domination in all locations. Morisita indices showed that most distribution gave positive values indicating clumped dispersion of microalgae in all locations. Higher Shannon-Weaver indices characterized the south coast of East Java and Madura compared to the north coast of East Java area, which corresponded with lower dominancy indices.

scholarly journals Analysis of Variance and Correlation Study of Chlorophyll-a in North and South Coast of Lombok Island Using Aqua MODIS Image Data

2020 ◽  
Vol 9 (2) ◽  
pp. 102-110
Author(s):  
Hendrata Wibisana ◽  
Siti Zainab ◽  
Zetta Rasullia Kamandang ◽  
Muhammad Rusdi
Keyword(s):  
Chlorophyll A ◽  
Analysis Of Variance ◽  
Coastal Region ◽  
Image Data ◽  
South Coast ◽  
North Coast ◽  
The North ◽  
Modis Image ◽  
North And South ◽  
Lombok Island

Chlorophyll-a mapping is widely used in the coastal environment. The mapping results can be utilized as guidance for fishing activities. The presence of chlorophyll-a in phytoplankton is much investigated concerning the existence of fish as a source of livelihood for fishermen around the globe.  One method extensively developed is the use of satellite imagery to map the chlorophyll-content in the coastal region from a small area to a global scale, such as Aqua MODIS image data. This study aims to monitor the distribution of chlorophyll-a on the north coast and south coast of Lombok island.  Analysis of variance and parametric statistical tests with t-distribution was utilized to examine the correlation between the two types of chlorophyll-a distribution of the coast area, Lombok Island. The result shows that the distribution of chlorophyll-a concentrations on the north coast and the south of the coast is not the same abundance; the south coast of Lombok island has smaller variances, with the concentration distribution is relatively the same. It differs from the north part; the distribution shows less diversity. This result indicates that a reasonably wide interval wherein some coordinates has a relatively diffuse chlorophyll-a concentration with a sufficiently high distribution level. Analysis of variance result also shows that both the north and south coasts have different fertility levels for their coastal waters, which are characterized by the growth rate of chlorophyll-a on the surface water along the coastal region examined

scholarly journals PEMBERDAYAAN PENGOLAH IKAN SKALA RUMAH TANGGA DI PROVINSI JAWA BARAT

2017 ◽  
Vol 12 (2) ◽  
pp. 189
Author(s):  
Yaya Hudaya ◽  
Aida Vitayala Hubeis ◽  
Basita Sugihen ◽  
Anna Fatchiya
Keyword(s):  
South Coast ◽  
North Coast ◽  
Small Scale ◽  
Fish Processing ◽  
The South ◽  
The West ◽  
West Java ◽  
The North ◽  
Significant Difference ◽  
North And South

Pemberdayaan pengolah ikan di Provinsi Jawa Barat dilakukan dengan tujuan untuk meningkatkan kesejahteraan pelaku usaha, menjamin keamanan pangan produk yang dihasilkan, dan ikut menjaga kelestarian sumber daya ikan yang ada. Tujuan penelitian ini adalah untuk menganalisis kinerja pemberdayaan pengolah ikan skala rumah tangga dan dampaknya di Provinsi Jawa Barat. Metode analisis menggunakan uji beda Man Whitney U. Hipotesis penelitian ini adalah ada perbedaan nyata proses pemberdayaan pengolah ikan dan dampaknya di pesisir utara Kabupaten Cirebon dan selatan Kabupaten Sukabumi, Provinsi Jawa Barat. Hasil penelitian menunjukkan tidak ada perbedaan nyata proses pemberdayaan pengolah ikan dan dampaknya baik di pesisir utara Kabupaten Cirebon maupun di pesisir selatan Kabupaten Sukabumi. Kebijakan pemberdayaan pengolahan ikan skala rumah tangga di Provinsi Jawa Barat baik di pesisir utara maupun selatan tidak perlu dibedakan. Namun, intensitas pemberdayaan terutama penyuluhan perikanan, bantuan peralatan dan modal usaha perlu ditingkatkan lagi. Title: The Empowerment of Small Scale Fish Processorsin West Java Province Empowerment of fish processors in West Java Province was carried out in order to improve wellbeing of the fish processors, ensuring food security of the product, and maintaining sustainability of the fish resource. The purpose of this study was to analyze performance of the empowerment of small scale fish processors and its related impact in the West Java Province. The analytical method used different test Man Whitney U. Hypothesis of this research was that there was a significant difference between the process of fish processing empowerment and its related impact in the north coast of Cirebon District and in the south coast of Sukabumi district of West Java Province. The results indicated that there was no significant difference between the process of fish processing empowerment and its impact both in the north coast of Cirebon and in the south coast of Sukabumi. Hence, policy on empowerment small scale fish processing household in both north and south coast districts of West Java Province can be treated the same. However, the intensity of empowerment, especially in terms of fisheries extension, equipment and business capital assistance need to be improved.

scholarly journals Women and Organizational Capabilities in Seaweed Production in North Gorontalo

2018 ◽  
Vol 34 (1) ◽  
pp. 1-10
Author(s):  
Sukarman Kamuli ◽  
Basri Amin
Keyword(s):  
Coastal Areas ◽  
Government Support ◽  
Organizational Capabilities ◽  
North Coast ◽  
Research Approach ◽  
Women's Associations ◽  
The North ◽  
Seaweed Production ◽  
The Government ◽  
Organizational Patterns

Despite the government support for economic development in some coastal areas in Indonesia, the paradigm about women’s agency remains almost the same. This is because women are still marginalized. This paper focuses on looking at agency of women in managing their resources. This study proves that women are active agents in coastal areas of North Gorontalo. Specifically, in the seaweed production, empirical evidences show significantly that women's associations succeeded in gaining economic advantages, participatory leadership, and had adaptability towards changes in technology and seaweed market. Applying a qualitative research approach, this study illustrates a number of policy subjects, organizational patterns, regional opportunity, and actors that support the centrality of women’s organizational capabilities in the field of seaweed production in the north coast of Gorontalo. This study justifies the tendency in Gorontalo, and perhaps in other areas in Indonesia, that women groups have an economic reputation in the seaweed production because they are fully involved in all production processes.

scholarly journals POTENSI DAYA DARI SOLAR CELL TERPASANG SESUAI DENGAN POLA ATAP RUMAH BERBASIS ARSITEKTUR BALI

2019 ◽  
Vol 6 (1) ◽  
pp. 21
Author(s):  
I Nyoman Apriana Arta Putra ◽  
Wayan Arta Wijaya ◽  
I.G.N Janardana
Keyword(s):  
Renewable Energy ◽  
Solar Cell ◽  
Renewable Energy Sources ◽  
Average Power ◽  
Solar Panels ◽  
The North ◽  
Southern Side ◽  
Maximum Warming ◽  
North And South

This study was conducted to determine the potential power obtained at home with the Balinese roof pattern when developed with renewable energy sources. Solar energy as a source of renewable energy has enormous potential, especially in Indonesia. Balinese architecture-based roof pattern has 4 fields, the north and south side are trapezoidal and the east and west sides are triangular with 350 roof inclination angle. One of Bali's traditional buildings is Bale Sari, which is a case study with an area of ??32.64 m2, length 6.40m and width 5.10m. Bale Sari's roof has a pyramid pattern, each side having the same length and width. Methods performed in this study with manual calculations to find the potential maximum power. The total number of solar panels used is 234 pieces. With this amount, obtained the best potential results on the southern side, with an average power gained of 667.67 Watt. The results are obtained when the sun is at a maximum warming point or precisely when the weather is sunny. The result of the average power potential analysis obtained by solar cell installed on the roof of the Balinese architecture house is 1,935.49 Watt.

scholarly journals Coastal Geoindicators and anomalous precipitation patterns associated with variations in the SAM and the ENSO

2017 ◽  
Vol 10 (5) ◽  
pp. 1419
Author(s):  
Venisse Schossler ◽  
Jefferson Cardia Simões ◽  
Francisco Eliseu Aquino ◽  
Catherine Fitzpatrick
Keyword(s):  
Remote Sensing ◽  
Southern Oscillation ◽  
Southern Annular Mode ◽  
South Coast ◽  
North Coast ◽  
The North ◽  
Lower Volume ◽  
Sedimentary Dynamics ◽  
Precipitation Anomalies ◽  
Sedimentary Budget

TThe interaction between ocean, continent and atmosphere submits the beaches to intense sedimentary dynamics. All processes of transport, erosion and sedimentary deposition are under direct influence of the climate and its variability. This papper expound variations in geoindicators by remote sensing in three different sectors of the Rio Grande do Sul Coastal Plain during periods of precipitation anomalies (PP) associated with the Southern Annular Mode (SAM) and El Niño - Southern Oscillation (ENSO), by the MEI index. Data from the satellite TRMM were used between 1998 and 2013, correlated to the two indexes by classification matrices and t student test. Geoindicators were compared between periods of precipitation above and below average. The results show a negative correlation between PP anomalies on the central and south coast and the SAM, and a positive correlation between PP anomalies on the south coast and the MEI. No similar correlations are found between the north coast and either of the two indexes. The majority of events are PP (78%) and can be simultaneously related to a SAM+ and a MEI- or only MEI+. All PP+ events were concomitant with MEI+. The geoindicators presented observable variations by remote sensing between the below and above average rainfall periods. The greater number of PP events in the areas of the geoindicators studied may represent a lower volume of sediments transported from the backshore to the shoreline changing the sedimentary budget. Wind can transport dry sands from dune fields and fill lakes and lagoons of the study area, unbalancing the ecosystem. 

scholarly journals Numerical study of sediment transport in Thu-Bon estuary and coastal areas of Hoi-An City

2022 ◽  
Vol 964 (1) ◽  
pp. 012001
Author(s):  
Nguyen Thong ◽  
Ho Tuan Duc ◽  
Phan Quang Hung ◽  
Tran Hai Yen
Keyword(s):  
Sediment Transport ◽  
Numerical Study ◽  
Monsoon Season ◽  
Sand Dunes ◽  
Coastal Areas ◽  
Main Trend ◽  
North Coast ◽  
Northeast Monsoon ◽  
The North ◽  
Depth Study

Abstract The area of Cua-Dai estuary and the coastal areas of Hoi-An City have experienced complicated erosion and sedimentation in recent years. Along the coast of Hoi-An, erosion often occurs, whereas in the area of Cua-Dai River, there is an accretion phenomenon that obstructs the waterway navigation from Cua-Dai to Cu-Lao-Cham. Occurrence of sand dunes in the offshore location of Cua-Dai has been recorded at a number of times in recent years. Studying the process of bed morphological change due to the sediment transport in the Thu-Bon river and the influence of monsoons in the area allows to explain the above phenomenon thus an in-depth study to propose appropriate solutions. This study used the numerical model Telemac which combines the hydro-morphodynamic and wave modules. The simulation results show that the main trend of coastal currents caused by tides and waves tends to go southward, leading to coastal erosion especially in the northeast monsoon season as well as sedimentation in the estuarine area. In addition, the model also shows the crucial role of waves in shoreline erosion, with the degree of erosion in the north coast near Cua-Dai being more severe than the southern coast, through the formation of local eddy flow on the north coast.

The last glaciation of Marvin Peninsula, northern Ellesmere Island, High Arctic, Canada

1989 ◽  
Vol 26 (12) ◽  
pp. 2578-2590 ◽  
Author(s):  
Donald S. Lemmen
Keyword(s):  
High Arctic ◽  
Ellesmere Island ◽  
North Coast ◽  
Radiocarbon Dates ◽  
The North ◽  
Last Glaciation ◽  
Ice Retreat ◽  
Late Wisconsinan ◽  
Glaciomarine Sediments ◽  
North And South

The limit of the last glaciation on Marvin Peninsula, northernmost Ellesmere Island, is recorded by extensive ice-marginal landforms and early Holocene glaciomarine sediments. While glaciers occupied most valleys on the peninsula, other areas remained ice free, as did most of the adjacent fiords. Beyond the ice limit, sparse erratics and degraded meltwater channels within weathered bedrock are evidence of older, more extensive glaciation(s). Shorelines and marine shells 50 m above the limit of the Holocene sea along the north coast relate to these older glacial events.Thirty-four new radiocarbon dates provide a chronology of ice buildup and retreat. Glaciers reached their limit after 23 ka, and locally as late as 11 ka. This was achieved by both expansion of existing glaciers and accumulation on plateau and lowland sites, which are presently ice free. Late Wisconsinan climate was characterized by cold and extreme aridity. Five dates ranging from 11 to 31 ka BP on subfossil bryophytes suggest that ice-free areas were biologically productive throughout the last glaciation. Ice retreat and postglacial emergence had begun by 9.5 ka and was associated with a marked climatic amelioration. The deglacial chronology confirms a pronounced disparity in the timing of ice retreat on the north and south sides of the Grant Land Mountains.

Is the north side of the Strait of Gibraltar more diverse than the south side? A case study using the intertidal peracarids (Crustacea: Malacostraca) associated to the seaweed Corallina elongata

2009 ◽  
Vol 89 (2) ◽  
pp. 387-397 ◽  
Author(s):  
José M. Guerra-García ◽  
Pilar Cabezas ◽  
Elena Baeza-Rojano ◽  
Free Espinosa ◽  
J. Carlos García-Gómez
Keyword(s):  
Diversity Index ◽  
Common Species ◽  
Rocky Shores ◽  
Mediterranean Species ◽  
Strait Of Gibraltar ◽  
Human Pressure ◽  
The North ◽  
North Side ◽  
North And South

The objectives of this study were to describe the peracaridean fauna associated to the algae Corallina elongata from the Strait of Gibraltar, and explore possible biodiversity and biogeographical patterns of variation along the north–south and Atlantic–Mediterranean axes across the Strait of Gibraltar. Twenty-five stations were selected along the north and south coasts of the Strait to cover the broadest possible range of human pressure and environmental conditions, including both natural rocky shores and artificial breakwaters. The alga Corallina elongata was selected as substrate, and the peracaridean crustaceans were identified to species level and classified in geographical distribution groups. Univariate and multivariate analyses were conducted to explore and confirm patterns of variation. Forty peracarid species were collected, most of them with an Atlantic–Mediterranean distribution (67%) with only the gammarid Parhyale eburnea, being an endemic Mediterranean species. The most common species collected during the present study were the gammarids Hyale stebbingi, Jassa marmorata, Stenothoe monoculoides and Ampithoe spp., the caprellids Caprella grandimana and C. penantis, the isopod Ischyromene lacazei and the tanaid Tanais dulongi. The number of species per station and the diversity index were significantly higher in the stations located along the north side of the Strait of Gibraltar. However, the two-way ANOVA discarded differences between north and south due to the type of substrate (natural versus artificial) and degree of human pressure. Based on peracaridean assemblages, the Strait of Gibraltar behaves as a whole and homogeneous region, with a very similar faunal composition in all stations and there is not a clear gradient of species substitution from the Mediterranean to the Atlantic stations. Provided that we selected the same substrate in all stations, and that statistical analyses revealed that differences between north and south stations were not due to environmental factors such as anthropogenic stress or type of substrate, we should look to historical biogeographical reasons to explain the higher diversity in the north side of the Strait of Gibraltar.

A Radiocarbon Date from the Central Coast of Peru

1961 ◽  
Vol 26 (4) ◽  
pp. 548-550
Author(s):  
Louis M. Stumer
Keyword(s):  
South Coast ◽  
Radiocarbon Date ◽  
North Coast ◽  
The South ◽  
Central Coast ◽  
The North

AbstractA specimen from a bundle of rope found at Playa Grande in association with pottery of Playa Grande 1 style and the white-zoned and white-slipped varieties of the Baños de Boza style is dated at A.D. 570 ± 160 (L-384A). Since the Playa Grande ceramic style has good crossties with Late Mochica, Salinar, Puerto Moorin, Maranga, and Nazca styles, this date tends to substantiate the generally accepted but not clearly demonstrated contemporaneity of the Mochica 3, 4, 5 sequence on the North Coast with the Playa Grande, Maranga sequence on the Central Coast and the Nazca A, B, Y development on the South Coast.

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