scholarly journals Population and Distribution Pattern of Egretta alba in Lampung Mangrove Center

2018 ◽  
Vol 6 (3) ◽  
pp. 73
Author(s):  
Puja Anggriana ◽  
Bainah Sari Dewi ◽  
Gunardi Djoko Winarno
Keyword(s):  
Distribution Pattern ◽  
Mangrove Forest ◽  
Random Distribution ◽  
Total Population ◽  
Line Transect ◽  
Morisita Index ◽  
Index Value ◽  
Bird Distribution ◽  
Population Prediction ◽  
Research Analysis

Lampung Mangrove Center (LMC) is a location model as a dedication Lampung University in mangrove forest management that can be used for “Tridarma Perguruan Tinggi”, including research on greater egret (Egretta alba). Research conducted by large birds (E. alba) is important to do, as one of the conservation efforts in LMC. The purpose of this study was to determine the population and the distribution pattern of Greater egret (E. Alba). The methods used in the three locations are Line Transect method, GIS method, and Literature method. The research analysis using population prediction, total population and bird distribution pattern with Morisita Index. Results of the study with a total of 1620 minute studies found greater egret (E. Alba) on field locations 64 frequency, at pond location 66 frequency and at mangrove forest 8 frequency, so the total encounter of greater egret (E. Alba) are 138 frequency. The distribution pattern of Greater egret (E. Alba) life in LMC is the random distribution with a Morisita Index value is 0,27 and Hernowo population prediction of large egrets value is 8 individuals/ha and Nurhasanah total population is 12-13 individuals/ha. Keywords: greater egret bird, distribution pattern, population

scholarly journals POLA SEBARAN, INDIKATOR KUALITAS LINGKUNGAN DAN EKOLOGI KOMUNITAS MANGROVE PULAU TUNDA(Distribution Pattern, Environmental And Ecological Quality Indicators Of Mangrove Forest Community Pulau Tunda)

2018 ◽  
Vol 14 (1) ◽  
pp. 43
Author(s):  
Syahrial Syahrial ◽  
Yudi Sastriawan
Keyword(s):  
Distribution Pattern ◽  
Quality Indicators ◽  
Environmental Quality ◽  
Mangrove Forest ◽  
Diversity Index ◽  
Reference Points ◽  
Forest Community ◽  
Tree Cover ◽  
Line Transect

Ekosistem mangrove terdapat di seluruh pantai maupun pulau-pulau kecil Indonesia yang terpengaruh oleh pasang surut. Kajian pola sebaran, indikator kualitas lingkungan dan ekologi komunitas mangrove Pulau Tunda dilakukan pada bulan Januari 2014 dengan tujuan untuk mengetahui pola sebaran, indikator kualitas lingkungan dan ekologi komunitas mangrovenya. Sampel mangrove diambil menggunakan transek garis dan plot yang ditarik dari titik acuan (tegakan mangrove terluar) serta tegak lurus garis pantai sampai ke daratan. Kemudian transek garis tersebut dibuat petak-petak contoh (plot) yang berukuran 10 x 10 m2 untuk kategori pohon dan di dalam ukuran 10 x 10 m2 dibuat plot berukuran 1 x 1 m2 untuk kategori semai. Pola penyebaran mangrove Pulau Tunda dianalisis berdasarkan indeks Morisita. Sementara kualitas lingkungan hutan mangrove dianalisis menggunakan tutupan pohon, tutupan semai dan jumlah jenis semai yang ditemukan. Kemudian ekologi komunitas mangrove Pulau Tunda dianalisis berdasarkan indeks keanekaragaman, dominansi dan keseragaman. Hasil penelitian menunjukan bahwa pola penyebaran mangrove Pulau Tunda tergolong beraturan (regular), dimana terjadi interaksi negatif antar individu dalam memperebutkan ruang, unsur hara maupun cahaya matahari. Selain itu, kondisi hutan mangrove Pulau Tunda masih tergolong baik dengan tingkat kualitas lingkungan vegetasi mangrove 73.74%, keanekaragaman dan dominansi mangrovenya tergolong rendah (1.20 dan 0.52) dan keseragamannya tergolong labil (0.60). Mangrove ecosystems are found throughout the coast and small islands of Indonesia which are affected by tides. Distribution pattern studies, environmental quality indicators and the ecological mangrove community of Tunda Island were carried out in January 2014 with the aim to determine distribution patterns, indicators of environmental quality and ecology of the mangroves community. Mangrove samples were taken using line transects and plots drawn from reference points (outer mangrove stands) and perpendicular to the coastline to the mainland. The line transect is made of plots of sample size 10 x 10 m2 for the category of trees and in a size of 10 x 10 m2 a plot of 1 x 1 m2 is made in the seedling category. The pattern of distribution of mangroves of Tunda Island was analyzed based on the Morisita index. While the environmental quality of mangrove forests was analyzed using tree cover, seedling cover and number of seedlings found. The ecology of the Tunda Island mangrove forest community was analyzed based on the diversity index, dominance and uniformity. The results showed that the pattern of mangrove distribution of Tunda Island was regular, where there was a negative interaction between individuals in fighting over space, nutrients and sunlight. In addition, the condition of the Tunda Island mangrove forest is still relatively good with the level of environmental quality of mangrove vegetation 73.74%, the diversity and dominance of mangroves are relatively low (1.20 and 0.52) and uniformity is classified as unstable (0.60). 

scholarly journals Gastropods In Mangrove Forest Of Tongkeina Village, Bunaken Sub-District, City Of Manado

2019 ◽  
Vol 10 (1) ◽  
pp. 1
Author(s):  
Dewanti Y Talumingan ◽  
Ferdinand F. Tilaar ◽  
Jety K. Rangan ◽  
Maartinus M Baroleh ◽  
Victor N. R. Watung ◽  
...  
Keyword(s):  
Distribution Pattern ◽  
Mangrove Forest ◽  
Distribution Patterns ◽  
Common Species ◽  
Line Transect ◽  
Sampling Point ◽  
Mangrove Forests ◽  
Mangrove Species ◽  
Long Line ◽  
Made In

This research aims to determine the types or species of gastropod and its distribution in mangrove forests in Tongkeina village and to know the species of mangrove in Tongkeina village. The Research was conducted on one sampling point with one 100 meters long line transect which was is laid perpendicular to the outer direction of the mangrove.  To collect gastropod samples, three quadrates with a size of 10x10meters with a distance between the quadrate 5 meters were made. In the quadrate, 15 subquadrates sized 1x1meters were also made. Based on the results, there were 6 species of gastropods and two distribution patterns of i.e., Cluster the species of the Littoraria scabra, Angustassiminea castanea, Terebralia sulcate. The uniform distribution pattern is Ischinocerithium rostratum, Caliostoma jujubinum, and Nerita senegalensis. There are ten mangrove species found and  the most common species is Soneratia alba with a total of 27 individuals.Keywords: Gastropods, forest, Mangrove, Tongkeina village ABSTRAKPenelitian ini bertujuan untuk mengetahui Jenis-jenis gastropoda serta persebaran pada hutan mangrove di Kelurahan Tongkeina dan untuk mengetahui Jenis-jenis mangrove di Kelurahan Tongkeina. Penelitian hanya di lakukan satu titik pengambilan sampel dimana dibuat 1 line transek dengan Panjang 100meter yang di tarik tegak lurus dari arah terluar mangrove kemudian dibuat 3 kuadrat dengan ukuran 10x10meter dengan jarak antara kuadrat 5 meter, dan di dalam kuadrat dibuat 15 subkuadrat berukuran 1x1 meter. Berdasarkan penelitian hasil ditemukan ada 6 spesies gastopoda dan dua pola persebaran Gastropoda yaitu mengelompok dan seragam, spesies mengelompok yaitu Littoraria scabra, Angustassiminea castanea, Terebralia sulcate. Pola persebaran seragam yaitu Ischinocerithium rostratum, Caliostoma jujubinum, Nerita senegalensis. Mangrove ditemukan 10 Spesies yang terbanyak adalah Soneratia alba dengan jumlah 27 individu.Kata kunci: Gastropoda, Hutan, Mangrove, Kelurahan Tongkeina.

scholarly journals Gastropods In Mangrove Forest Of Tongkeina Village, Bunaken Sub-District, City Of Manado

2019 ◽  
Vol 10 (1) ◽  
pp. 1
Author(s):  
Dewanti Y Talumingan ◽  
Ferdinand F. Tilaar ◽  
Jety K. Rangan ◽  
Maartinus Baroleh ◽  
Victor N. R. Watung ◽  
...  
Keyword(s):  
Distribution Pattern ◽  
Mangrove Forest ◽  
Distribution Patterns ◽  
Common Species ◽  
Line Transect ◽  
Sampling Point ◽  
Mangrove Forests ◽  
Mangrove Species ◽  
Long Line ◽  
Made In

This research aims to determine the types or species of gastropod and its distribution in mangrove forests in Tongkeina village and to know the species of mangrove in Tongkeina village. The Research was conducted on one sampling point with one 100 meters long line transect which was is laid perpendicular to the outer direction of the mangrove.  To collect gastropod samples, three quadrates with a size of 10x10meters with a distance between the quadrate 5 meters were made. In the quadrate, 15 subquadrates sized 1x1meters were also made. Based on the results, there were 6 species of gastropods and two distribution patterns of i.e., Cluster the species of the Littoraria scabra, Angustassiminea castanea, Terebralia sulcate. The uniform distribution pattern is Ischinocerithium rostratum, Caliostoma jujubinum, and Nerita senegalensis. There are ten mangrove species found and  the most common species is Soneratia alba with a total of 27 individuals.Keywords: Gastropods, forest, Mangrove, Tongkeina village ABSTRAKPenelitian ini bertujuan untuk mengetahui Jenis-jenis gastropoda serta persebaran pada hutan mangrove di Kelurahan Tongkeina dan untuk mengetahui Jenis-jenis mangrove di Kelurahan Tongkeina. Penelitian hanya di lakukan satu titik pengambilan sampel dimana dibuat 1 line transek dengan Panjang 100meter yang di tarik tegak lurus dari arah terluar mangrove kemudian dibuat 3 kuadrat dengan ukuran 10x10meter dengan jarak antara kuadrat 5 meter, dan di dalam kuadrat dibuat 15 subkuadrat berukuran 1x1 meter. Berdasarkan penelitian hasil ditemukan ada 6 spesies gastopoda dan dua pola persebaran Gastropoda yaitu mengelompok dan seragam, spesies mengelompok yaitu Littoraria scabra, Angustassiminea castanea, Terebralia sulcate. Pola persebaran seragam yaitu Ischinocerithium rostratum, Caliostoma jujubinum, Nerita senegalensis. Mangrove ditemukan 10 Spesies yang terbanyak adalah Soneratia alba dengan jumlah 27 individu.Kata kunci: Gastropoda, Hutan, Mangrove, Kelurahan Tongkeina.

scholarly journals KEANEKARAGAMAN DAN POLA DISTRIBUSI GASTROPODA MANGROVE DI TELUK PANGPANG BLOK JATI PAPAK TN ALAS PURWO BANYUWANGI

2021 ◽  
Vol 4 (01) ◽  
pp. 33-46
Author(s):  
Lina Susanti ◽  
Fuad Ardiyansayh ◽  
Hasyim As'ari
Keyword(s):  
Distribution Pattern ◽  
Trophic Level ◽  
Mangrove Forest ◽  
National Park ◽  
Sampling Method ◽  
Random Distribution ◽  
Distribution Patterns ◽  
Purposive Sampling

The gastropods diversity have a role towards stability ecosystem in trophic level. The existence gastropods really take effect for other organism the trophic level higher than gastropods. The purpose of was to determine the value  of diverity and distribution patterns of gastropods in the mangrove forest, Jati Papak Block National Park Alas Purwo. The method used in this research is by using purposive sampling method. Sampling was divided into three stations with a range of 250 m from each station.Each station is 220 m of long and 96 m of wide with a plot measuring 2 × 2 m2. The result obtained 8 families of Gastropods with 13 genus and 19 species. Gastropods diversity ranges from H`=1.387-1.359 which indicates that the area has a moderate diversity value. The distribution pattern of gastropods between location has two distribution patterns, namely clustered and random distribution patterns

scholarly journals KEPADATAN DAN POLA PENYEBARAN PASAK BUMI (Eurycoma longifolia Jack) DI ZONA ALAMAN KUYANG, HUTAN LARANGAN ADAT KENEGARIAN RUMBIO

2016 ◽  
Vol 6 (1) ◽  
pp. 41 ◽  
Author(s):  
ZULFAHMI ZULFAHMI ◽  
NELAWATI NELAWATI ◽  
ROSMAINA ROSMAINA
Keyword(s):  
Distribution Pattern ◽  
Sampling Method ◽  
Forest Reserve ◽  
Purposive Sampling ◽  
Eurycoma Longifolia ◽  
Plot Size ◽  
Eurycoma Longifolia Jack ◽  
Morisita Index ◽  
Index Value ◽  
Made In

The objective of this research was to know the density and distribution pattern of E. longifolia in the Alaman Kuyang zone of the forest reserve of Kenegerian Rumbio. The research used purposive sampling method. The observation plot is made in square plot  which plot size was 20 x50 m.  Results of this study showed that density  of E. longifolia in Alaman Kuyang zone of forest reserve of Kenegarian Rumbio was 130 individual ha-1, which seedling phase is more dominance than  sapling and pole phases. The density of E.longifolia was low due to increasing the harvesting of this species from forest reserve of Kenegarian Rumbio, and addition poor of mother trees in area study. Distribution pattern of E. longifolia were clumped with Morisita Index value > 1, this could be explained since seed of E. longifolia dispersed and grew not far from mother trees.

scholarly journals Gastropods In Mangrove Forest Of Tongkeina Village, Bunaken Sub-District, City Of Manado

2019 ◽  
Vol 10 (1) ◽  
pp. 1
Author(s):  
Dewanti Y Talumingan ◽  
Ferdinand F. Tilaar ◽  
Jety K. Rangan ◽  
Maartinus Baroleh ◽  
Victor N. R. Watung ◽  
...  
Keyword(s):  
Distribution Pattern ◽  
Mangrove Forest ◽  
Distribution Patterns ◽  
Common Species ◽  
Line Transect ◽  
Sampling Point ◽  
Mangrove Forests ◽  
Mangrove Species ◽  
Long Line ◽  
Made In

This research aims to determine the types or species of gastropod and its distribution in mangrove forests in Tongkeina village and to know the species of mangrove in Tongkeina village. The Research was conducted on one sampling point with one 100 meters long line transect which was is laid perpendicular to the outer direction of the mangrove.  To collect gastropod samples, three quadrates with a size of 10x10meters with a distance between the quadrate 5 meters were made. In the quadrate, 15 subquadrates sized 1x1meters were also made. Based on the results, there were 6 species of gastropods and two distribution patterns of i.e., Cluster the species of the Littoraria scabra, Angustassiminea castanea, Terebralia sulcate. The uniform distribution pattern is Ischinocerithium rostratum, Caliostoma jujubinum, and Nerita senegalensis. There are ten mangrove species found and  the most common species is Soneratia alba with a total of 27 individuals.Keywords: Gastropods, forest, Mangrove, Tongkeina village ABSTRAKPenelitian ini bertujuan untuk mengetahui Jenis-jenis gastropoda serta persebaran pada hutan mangrove di Kelurahan Tongkeina dan untuk mengetahui Jenis-jenis mangrove di Kelurahan Tongkeina. Penelitian hanya di lakukan satu titik pengambilan sampel dimana dibuat 1 line transek dengan Panjang 100meter yang di tarik tegak lurus dari arah terluar mangrove kemudian dibuat 3 kuadrat dengan ukuran 10x10meter dengan jarak antara kuadrat 5 meter, dan di dalam kuadrat dibuat 15 subkuadrat berukuran 1x1 meter. Berdasarkan penelitian hasil ditemukan ada 6 spesies gastopoda dan dua pola persebaran Gastropoda yaitu mengelompok dan seragam, spesies mengelompok yaitu Littoraria scabra, Angustassiminea castanea, Terebralia sulcate. Pola persebaran seragam yaitu Ischinocerithium rostratum, Caliostoma jujubinum, Nerita senegalensis. Mangrove ditemukan 10 Spesies yang terbanyak adalah Soneratia alba dengan jumlah 27 individu.Kata kunci: Gastropoda, Hutan, Mangrove, Kelurahan Tongkeina.

DIVERSITY OF FISH LARVAE AROUND THE ESTUARY OF THE BANYUASIN RIVER, SOUTH SUMATERA PROVINCE

2020 ◽  
Vol 6 (2) ◽  
Author(s):  
Moh. Rasyid Ridho ◽  
Enggar Patriono ◽  
Sarno Sarno ◽  
Sahira Wirda
Keyword(s):  
Initial Phase ◽  
Sampling Method ◽  
Environmental Changes ◽  
Negative Impact ◽  
Fish Larvae ◽  
River Estuary ◽  
Sampling Technique ◽  
Critical Phase ◽  
Morisita Index ◽  
Index Value

The initial phase of the fish life cycle is a critical phase associated with high mortality due to sensitivity to predators, food availability, and also environmental changes that occur in nature. Disruption of the initial stages of fish life has a negative impact on fish populations. Until now there has been no information about fish larvae around the Banyuasin River Estuary. Therefore, research is needed on the diversity of fish larvae around the Banyuasin River Estuary, South Sumatra Province. This research were used purposive sampling method, sampling technique in the form of Cruise Track Design with continuous parallel survey trajectory. Based on the results of the study found as many as 10 families consisting of 1483 individuals of fish larvae in March and 1013 individuals of fish larvae in May consisting of Engraulidae 1,601 individuals of fish larvae, Mungiloidei as many as 109 individuals, Leiognathidae 50 individuals, Chanidae 453 individuals, Scatophagidae 20 individuals , Belonidae 39 individuals, Gobioididae 5 individuals, Chandidae 183 individuals, Syngnatihidae 6 individuals, and Gobiidae 30 individuals fish larvae. The index value of fish larvae diversity is classified as medium category (March 1.02 and May 1.12), Morisita index shows the distribution pattern of fish larvae classified as a group (March 0-14.17 and May 2.43-10.40 ), and the evenness index value is in the medium category (March 0.437 and May 0.521).

scholarly journals Carbon Stock Estimation of Mangrove Forest in Village Margasari Sub-District Labuhan Maringgai District East Lampung

2018 ◽  
Vol 6 (1) ◽  
pp. 66 ◽  
Author(s):  
Cahyaning Windarni ◽  
Agus Setiawan ◽  
Rusita Rusita
Keyword(s):  
Mangrove Forest ◽  
Carbon Stock ◽  
Dry Weight ◽  
Co2 Concentration ◽  
Line Transect ◽  
Mangrove Forests ◽  
First Line ◽  
Average Biomass ◽  
Stock Estimation ◽  
Total Dry Weight

Increasing CO2 in the atmosphere and decreasing amount of forest as absorb CO2are factors which was the underlying repercussion of climate change. One of solutions for decreasing CO2 concentration through the forest vegetation’s development and emendation. Mangrove forest estimated that effectively absorb carbon through photosynthesis. The purpose of the studyis to estimate the stand and litter carbon stock of mangrove forest. The research used line transectmethod. The first line and plot determined randomly then the next lineand plots was sistematically. The observation plots had measurement with amount of 20m x 20m with spacing between plot in line 20 m with total 20 plots. Each plot was measured diameter just  ≥ 5 cm. Each plot made observations litter sub plots with amount of 0,5 m x 0,5 m. Carbon estimation of stand biomass using allometric equations B = 0,1848D2.3624 and litter biomass using total dry weight. Carbon concentration of organic material typically contains around 46% thus multiplying the biomass by 46%. The average biomass of mangrove forests amounted to 431,78 tons/ha. Carbon estimated of mangrove stand was 197,36 ton/ha and litter carbon was 1,25 ton/ha, based on the research total of carbon mangrove forest was198,61 ton/ha. Keywords:carbon above ground,line transect, mangrove forest

Ecological and environmental indicators of Brazil Nut Tree (Bertholletia excelsa Bonpl.) in Flona do Jamari, Rondônia

2020 ◽  
Vol 11 (7) ◽  
pp. 740-751
Author(s):  
Nilson Reinaldo Fernandes dos Santos Júnior ◽  
Diogo Martins Rosa ◽  
José Das Dores de Sá Rocha ◽  
Marta Silvana Volpato Sccoti ◽  
Scheila Cristina Biazatti ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Distribution Pattern ◽  
Geographic Location ◽  
Distribution Patterns ◽  
Environmental Indicators ◽  
Diameter Distribution ◽  
Brazil Nut ◽  
Productive Potential ◽  
Morisita Index ◽  
Individual Trees

Mapping Brazil nut trees in the Amazon is essential for indicating its distribution patterns within different ecosystems, while also being useful to estimate the species productive potential. This study aimed to evaluate the spatial distribution of Brazil nut trees in Flona do Jamari – RO, considering its environmental and topographic conditions. A census was performed for all individual trees sized ≥ 35 cm in diameter at 1.30 m breast height (DBH) above the ground of six Annual Production Units (APU) in Forest Management Unit III (FMU-III), a 11,011.2 ha area of Flona do Jamari, RO. DBH and geographic location (GPS) were collected for each tree. Structure and diameter distribution were evaluated by abundance, density, dominance, and frequency. The Morisita index was used to identify the spatial distribution pattern. The environment was defined by the local relative height found along the drainage network, by the digital model Height Above the Nearest Drainage (HAND). Most trees were among DBH intermediate classes (60 to 140 cm), and only a few were young trees (DBH < 50 cm). Brazil nut trees present a random spatial distribution and a predominant distribution pattern of 'terra-firme (solid ground)'. Such information on the species structural, spatial, and ecological patterns serve as key elements for further studies on production potential.

scholarly journals Determination of the 1,3- and 2-Positional Distribution of Fatty Acids in Olive Oil Triacylglycerols by 13C Nuclear Magnetic Resonance Spectroscopy

2006 ◽  
Vol 89 (4) ◽  
pp. 1071-1076 ◽  
Author(s):  
Giovanna Vlahov
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Fatty Acid ◽  
Nmr Spectroscopy ◽  
Magnetic Resonance ◽  
Olive Oil ◽  
Distribution Pattern ◽  
Random Distribution ◽  
Linear Models ◽  
13C Nuclear Magnetic Resonance ◽  
Nuclear Magnetic

Abstract Linear models were selected from a large data set acquired for Italian olive oil samples by quantitative 13C nuclear magnetic resonance (NMR) spectroscopy with distortionless enhancement by polarization transfer (DEPT). The models were used to determine the composition of the 2 fatty acid pools esterifying the 1,3- and 2-positions of triacylglycerols. The linear models selected proved that the 1,3- and 2-distribution of saturated, oleate, and linoleate chains in olive oil triacylglycerols deviated from the random distribution pattern to an extent that depended on the concentration of the fatty acid in the whole triacylglycerol. To calculate the fatty acid composition of the 1,3- and 2-positions of olive oil triacylglycerols, the equations of the selected linear models were applied to the fatty acid percentages determined by gas chromatography. These data were compared with the values predicted by the computer method (used to determine the theoretical amounts of triacylglycerols), which is based on the 1,3-random-2-random theory of the fatty acid distribution in triacylglycerols. The biggest differences were found in the linoleate chain, which is the chain that deviated the most from a random distribution pattern. The results confirmed that the 1,3-random-2-random distribution theory provides an approximate method for determining the structure of triacylglycerols; however, the linear models calculated by the direct method that applies 13C NMR spectroscopy represent a more precise measurement of the composition of the 2 fatty acid pools esterifying the 1,3- and 2-positions of triacylglycerols.

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