scholarly journals Gastropod Density and Diversity in the Intertidal Zone of Malalayang Beach, Manado

2020 ◽  
Vol 10 (3) ◽  
pp. 121
Author(s):  
Sheyrel Tongkeles ◽  
Fransine B. Manginsela ◽  
Jety K. Rangan ◽  
Alex D. Kambey
Keyword(s):  
Intertidal Zone ◽  
Diversity Index ◽  
Line Transect ◽  
Random Numbers ◽  
Total Density ◽  
Gastropod Species ◽  
Transect Line ◽  
Line Transects ◽  
High Diversity

This study held in Malalayang Beach Manado, aims to determine  the density and diversity of Gastropods on the Malalayang coast of Manado. So the research objective is to find out the density and diversity of  Gastropods in Malalayang Beach, Manado. The study using the line transect technique with 50 cm x 50 cm sized. The transect line is placed perpendicular to the coastline. The distance between the line transects is 20 meters. On each transect line 5 squares are placed. The distance between squares is determined using random numbers. Gastropod species found in Malalayang Beach Manado consist of  31 species and 17 genus, each consisting of the Archaeogastropoda that consists of 3 species, Mesogastropoda consists of  9 species, and the Order of the Neogastropoda of 19 species. The total density of Gastropods in Malalayang Beach in Manado is 6.27 individuals / m2 with diversity of 3.07, according to the criteria for diversity index of Malalayang coast having high diversity. Based on this, it is suggested that Manado Malalayang Beach can be maintained and carried out management that considers the feasibility of the environment as one of the requirements for sustainable development.Keywords: Gastropods, Density, Species DiversityABSTRAK Penelitian ini dilakukan di Pantai Malalayang Manado,berkaitan dengan permasalahan yang dikemukakan bagaimanakah kepadatan dan keanekaragaman Gastropoda di pantai Malalayang Manado. Maka tujuan penelitian adalah Mengetahui kepadatan dan keanekaragaman Gastropoda di Pantai Malalayang Manado. Pengumpulan data dengan pendekatan Teknik line transect menggunakan kuadrat berukuran 50cm x 50cm. Line transect diletakkan tegak lurus dengan garis pantai. Jarak antara line transect sebesar 20 meter. Pada masing- masing line transect diletakkan 5 kuadrat. Jarak antar kuadrat ditentukan dengan menggunakan angka acak. Spesies Gastropoda yang ditemukan di Pantai Malalayang Manado terdiri dari 31 spesies dan 17 genera yang masing-masing terdiri dari Ordo Archaeogastropoda 3 spesies, Ordo Mesogastropoda 9 spesies, dan Ordo Neogastropoda 19 spesies. Kepadatan total Gastropoda di Pantai Malalayang Manado 6.27 individu/m2 dengan keanekaragaman 3,07, Menurut kriteria indeks keanekaragaman pantai Malalayang memiliki keanekaragaman yang tinggi. Berdasarkan hal tersebut, maka disarankan agar Pantai Malalayang Manado dapat dijaga dan dilakukan pengelolaan yang mempertimbangkan sskelayakan lingkungan sebagai salah satu syarat pembangunan berkelanjutan.Kata kunci: Gastropoda, Kepadatan, Keanekaragaman Jenis

scholarly journals KEANEKARAGAMAN JENIS BURUNG RANGKONG (Bucerotidae) DI STASIUN PENELITIAN WAY CANGUK TAMAN NASIONAL BUKIT BARISAN SELATAN

2021 ◽  
Vol 4 (2) ◽  
pp. 153
Author(s):  
Muhammad Sarpin Pratama ◽  
Agus Setiawan ◽  
Sugeng Prayitno Harianto ◽  
Nuning Nurcahyani
Keyword(s):  
National Park ◽  
Diversity Index ◽  
Descriptive Analysis ◽  
Index Formula ◽  
Research Station ◽  
Species Diversity Index ◽  
Transect Line ◽  
Line Transects ◽  
Index Value ◽  
Almost All

The rise of hornbill hunting and deforestation that occurred in Indonesia, especially the island of Sumatra lately, threatening the preservation of these birds in nature. The purpose of this study was to determine thediversity of hornbill species in the Way Canguk Research Station, Bukit Barisan Selatan National Park. The method used in this study is a transect line with a total of 18 line transects. The data obtained was processed using the Shanon wienners diversity index formula, then translated with descriptive analysis. A total of 5 types of hornbills found in these locations are rhinoceros hornbills (Buceros rhinoceros), helmeted hornbills (Rhinoplax vigil), wreathed hornbill (Rhyticeros undulatus), bushy crested hornbill (Anorrhinus galeritus) and white crowned hornbill (Berenicornis comatus), with a species diversity index value of 1.00 included in the low category and the evenness of the species is a stable with an evenness index value of 0.62. The highest abundance of hornbills is (Anorrhinus galeritus) a beside that hornbills can be found in almost all transect lines.

scholarly journals KEANEKARAGAMAN GASTROPODA PADA ZONA INTERTIDAL TENGAH (MIDLE INTERTIDAL ZONE) DAN ZONA INTERTIDAL BAWAH (LOWER INTERTIDAL ZONE) DAERAH PADANG LAMUN DESA WAAI

2014 ◽  
Vol 1 (1) ◽  
pp. 8-12
Author(s):  
Sriyanti Salmanu
Keyword(s):  
Coastal Waters ◽  
Intertidal Zone ◽  
Diversity Index ◽  
Index Formula ◽  
Observation Station ◽  
Gastropod Species ◽  
The People ◽  
Lower Intertidal Zone ◽  
Zonation Patterns ◽  
Index Of Diversity

Background: Seagrass grows and spreads in nearly all parts of the intertidal zone. Waai village has characteristic sloping coastal water and have different patterns of zonation of seagrass in the intertidal zone's third-impact on the presence of seagrass and the organisms in it. Methods: The study was conducted in coastal waters Waai village, in the middle of the intertidal zone (middle intertidal zone) and the lower intertidal zone (lower zone intertidal). The samples in this study are all kinds of gastropods found in each plot observation station of 100 plots. Gastropod species diversity using diversity index formula Shannon - Wiener referred to under Ludwig and Reynolds. Results: From the results of the study found 8 species of gastropods and has a diversity index that is currently in the middle intertidal zone, the average diversity index of 1.76, while in the lower intertidal zone, the average gastropod diversity index was 1.45. Conclusion: diversity index indicates the middle intertidal zone, the average diversity index of 1.76, while in the lower intertidal zone, the average index of diversity of gastropods is 1.45, this is caused by the different seagrass zonation patterns and habits of the people who frequently uses seagrass area for commercial purposes.

scholarly journals Struktur, Komposisi Jenis Pohon dan Nilai Ekologi Vegetasi Kawasan Hutan di Kampung Sewan Distrik Sarmi, Kabupaten Sarmi

2018 ◽  
Vol 1 (2) ◽  
pp. 72-80
Author(s):  
Floriana Kabelen ◽  
Maklon Warpur
Keyword(s):  
Diversity Index ◽  
Buffer Zone ◽  
Tree Level ◽  
Line Transect ◽  
Ecological Value ◽  
Lowland Forest ◽  
Tropical Lowland ◽  
Tropical Lowland Forest ◽  
Vegetation Species ◽  
High Diversity

This study was to obtain the description of tropical lowland forest of Papua in Sewan village, Sarmi District, Jayapura region. The main objective was to investigate the structure, species composition and ecological value of the forest vegetation. Research methods included line transect, documentation, interview and literature review. Index Shannon Wiener was used to determine the level of species diversity. The results revealed that 27 tree species that grouped into 17 families inhabited the study area. The density of trees was 209 individuals/ha. A number of saplings were identified into 17 species and grouped into 15 families with the density 104 individuals/ha. At the tree level, species with the high important value (IV) index. important value (IV) index were Pometia pinnata Forst. (54.31%), Macaranga gigantea M.A. (45.33%), Knema sp. (27.37%), Nauclea orientalis L. (20.69%), Intsia palembanica Miq. (13.86%), and the other species had lower INP. At the saplings level species that had high INP were Pometia pinnata Forst. (84.05%), Horsfieldia sylvestris Warb. (34.87%), Knema sp (25.92%), Celtis nerifolia (22.54%), and Pterocarpus indicus Willd. (18.12%). Diversity index at tree level and saplings level were 2.73 and 1.91 respectively, and this showed the high diversity of the trees compared to that of the saplings. The ecological value of the forest in Sewan village included the function as watershed area, buffer zone for the wildlife and as habitat for several fauna especially birds and bats. Key words: analysis of vegetation, species of trees, Sewan village, Sarmi.

scholarly journals STUDI KEANEKARAGAMAN JENIS BURUNG DI KAWASAN HUTAN KOTA DESA KUWIL KABUPATEN MINAHASA UTARA

PHARMACON ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 725
Author(s):  
Rio P. Saibi ◽  
Saroyo Saroyo ◽  
Hanny H. Pontororing
Keyword(s):  
Species Diversity ◽  
Data Collection ◽  
Natural Regeneration ◽  
Urban Forest ◽  
Diversity Index ◽  
Survey Methods ◽  
Bird Species ◽  
Line Transect ◽  
Natural Habitats ◽  
Line Transects

ABSTRACT Birds are one of the forest's ecosystem components which able to help in the forest's natural regeneration, with one of the bird's natural habitats being urban forests. This study aims to analyze the diversity and describe the bird's species in the Urban Forest habitat of the Kuwil Village of North Minahasa Regency. Data collection used survey methods with plots in form of 2 rectangular line transects with a length of 2000 m each and 20 m wide. Data collection is done 5 times. Based on the research, there were 10 species of birds with a diversity index of bird species as 1.98 which was in the medium category. The species found were Halcyon chloris, Corvus enca, Pycnonotus aurigaster, Oriolus chinensis, Gerygone sulphurea, Galliralus torquatus, Phaenicophaeus calyorhynchus, Eudynamys melanorhyncus, Geopelia striata, and Ducula aenea. Key words: Species Diversity, Urban Forest, Bird ABSTRAK Burung merupakan salah satu komponen ekosistem hutan dengan fungsinya membantu regenerasi  hutan secara alami, dengan salah satu habitat alami burung adalah hutan kota. Penelitian ini bertujuan untuk menganalisis keanekaragaman jenis burung pada habitat Hutan Kota Desa Kuwil Kabupaten Minahasa Utara dan mendeskripsikan jenis-jenisnya. Pengambilan data menggunakan metode survei dengan plot berbentuk 2 garis transek (line transect) persegi panjang dengan panjang masing-masing transek 2000 m dan lebar 20 m. Pengambilan data dilakukan sebanyak 5 kali. Berdasarkan penelitian didapatkan 10 jenis burung dengan nilai indeks keanekaragaman jenis burung sebesar 1,98 yang termasuk kategori sedang. Adapun jenis-jenis burung yang ditemukan adalah sebagai berikut  Halcyon chloris, Corvus enca, Pycnonotus aurigaster, Oriolus chinensis, Gerygone sulphurea, Galliralus torquatus, Phaenicophaeus calyorhynchus, Eudynamys melanorhyncus, Geopelia striata dan Ducula aenea. Kata kunci: Keanekaragaman Jenis, Hutan Kota, Burung

The diet and vegetation composition of Egyptian tortoise habitat in North Sinai, Egypt

2021 ◽  
pp. 1-12
Author(s):  
Omar Attum ◽  
Basem Rabia ◽  
Magdy El-Bana ◽  
Sherif Baha El Din
Keyword(s):  
Vegetation Cover ◽  
Diversity Index ◽  
Food Preferences ◽  
Arid Environment ◽  
Vegetation Composition ◽  
Vegetation Survey ◽  
Direct Observations ◽  
High Species Richness ◽  
Line Transects ◽  
North Sinai

Abstract We studied the diet and vegetation composition of Egyptian tortoise, Testudo kleinmanni, habitat in North Sinai, Egypt. Dietary data was recorded through direct observations and the vegetation composition was recorded through the use of quadrats and line transects in 66 sampling points (33 in tortoise areas and 33 in non-tortoise areas). Our results showed that vegetation of Egyptian tortoise habitat had high species richness, Simpson’s diversity index, and vegetation cover in contrast to areas without Egyptian tortoises. These tortoises ate thirty four species of plants, a majority of these being perennials, with most feeding observations occurring in spring and winter. The consumption of perennials may enable Egyptian tortoises to find and consume food in an arid environment with low, variable and unpredictable rainfall. The plants most consumed were rare in our vegetation survey, suggesting food preferences. Our study suggests that Egyptian tortoises, which rely on vegetation for food and refugia, may suffer if vegetation cover and richness decrease.

scholarly journals The influence of animal mobility on the assumption of uniform distances in aerial line-transect surveys

2008 ◽  
Vol 35 (4) ◽  
pp. 275 ◽  
Author(s):  
Rachel M. Fewster ◽  
Colin Southwell ◽  
David L. Borchers ◽  
Stephen T. Buckland ◽  
Anthony R. Pople
Keyword(s):  
Survey Design ◽  
Distance Sampling ◽  
High Mobility ◽  
Line Transect ◽  
Transect Line ◽  
Aerial Surveys ◽  
Pack Ice ◽  
Capture Recapture ◽  
Distance Data ◽  
Crabeater Seals

Line-transect distance sampling is a widely used method for estimating animal density from aerial surveys. Analysis of line-transect distance data usually relies on a requirement that the statistical distribution of distances of animal groups from the transect line is uniform. We show that this requirement is satisfied by the survey design if all other assumptions of distance sampling hold, but it can be violated by consistent survey problems such as responsive movement of the animals towards or away from the observer. We hypothesise that problems with the uniform requirement are unlikely to be encountered for immobile taxa, but might become substantial for species of high mobility. We test evidence for non-uniformity using double-observer distance data from two aerial surveys of five species with a spectrum of mobility capabilities and tendencies. No clear evidence against uniformity was found for crabeater seals or emperor penguins on the pack-ice in East Antarctica, while minor non-uniformity consistent with responsive movement up to 30 m was found for Adelie penguins. Strong evidence of either non-uniformity or a failure of the capture–recapture validating method was found for eastern grey kangaroos and red kangaroos in Queensland.

scholarly journals Birds species composition and abundance of a relativelly undisturbed vegetation at Mount Pati, Lokoja, Kogi State

2019 ◽  
Vol 6 (12) ◽  
pp. 271-282
Author(s):  
Dauda Tanko ◽  
Rita Chinweuba
Keyword(s):  
State Government ◽  
Diversity Index ◽  
Anthropogenic Activities ◽  
Bird Species ◽  
Activity Level ◽  
Line Transect ◽  
Biological Factors ◽  
Wet Season ◽  
Fuel Wood ◽  
Wiener Diversity Index

Avifauna of a relatively undisturbed vegetation at Mount Patti of Lokoja was surveyed from January to June, 2018. Line transect and point count techniques were used for data collection. This was done by weekly visits to the site between 6:00 h and 10:00 h of the day. Bird identification was done with the aid of a pair of binoculars, Field Guide of birds of western Africa and recorded bird calls. Monthly variation and season variation in bird composition and abundance were compared using Shannon-Wiener diversity index and equitability index. There were 39 species in 21 families encountered during the survey. The Family Nectarinidae had the highest number of 5 species, followed by Columbidae and Estrildidae with 4 species each. A total of 1,148 individuals were encountered during the six months survey with village weaver having the highest encountered rate of 107 while yellow-throated Long-claw had the least encountered rate of 4 individuals. Fluctuation was observed in the monthly encountered rate of the birds. Diversity and equitability indices had their highest values of 5.24 and 1.51 in January. More birds (696) were encountered in the wet season than the dry season (452). Four species were seen only in the wet season. Species effort curve showed that there are more species to be discover. The number of species encountered in this study revealed that the mountain is rich composition of bird species, even though the site seems to favour species that show preference to disturbed areas. The on-going anthropogenic activities probably paved way to these species to move in. Monthly and seasonal fluctuation of bird species diversity and abundance may be due to a combination of physical and biological factors. The physical and biological factors observed at the site which we speculate could be reasons for the observed fluctuations include slash and burnt system of farming, fuel-wood harvesting, intensive sporting activities creation of foot paths etc. High encountered rate indicate abundance and high activity level of the species. The village weaver was the most encountered species probably because they are known to be lousy, move in flocks and breed in colonies. In view of the rich composition and abundance of bird species on Mount Patti and the site being a suitable breeding site for the weavers. We recommend further study of the place as there are yet more species to be discovered as indicated by the species effort curve. There is need for conservation procedures to be initiated at the place and this study should serve as a baseline to initiate such programme by the state government.

scholarly journals Vegetation structure and floristic composition of tree species in the habitat of Scaphium macropodum in Gunung Leuser National Park, Sumatra, Indonesia

2020 ◽  
Vol 21 (7) ◽  
Author(s):  
ARIDA SUSILOWATI ◽  
DENI ELFIATI ◽  
HENTI HENDALSTUTI RACHMAT ◽  
KUSUMADEWI SRI YULITA ◽  
ADI NURUL HADI ◽  
...  
Keyword(s):  
Tree Species ◽  
Vegetation Structure ◽  
National Park ◽  
Diversity Index ◽  
Good Condition ◽  
Floristic Composition ◽  
Line Transect ◽  
Growth Stages ◽  
Limited Information ◽  
Wiener Diversity Index

Abstract. Susilowati A, Elfiati D, Rachmat HH, Yulita KS, Hadi AN, Kusuma YS, Batu SAL. 2020. Vegetation structure and floristic composition of tree species in the habitat of Scaphium macropodum in Gunung Leuser National Park, Sumatra, Indonesia. Biodiversitas 21: 3025-3033. Scaphium macropodum (Miq.) Beumee Ex K Heyne is a member of Malvaceae tree species and globally recognized as malva nut and locally known as ‘kembang semangkok’, ‘tempayang’, ‘merpayang’ or ‘kepayang’. The nut of S. macropodum has many benefits for medicinal purposes, yet destructive extraction of this tree species has led them to extinction. Among its natural distribution in Indonesia, North Sumatra Province, Indonesia is known as its original range, but there is limited information about the existence of this species. This study aimed to determine the vegetation structure of some tree species in the habitat of S. macropodum in Sikundur, Gunung Leuser National Park, Sumatra, Indonesia. Purposive sampling technique was employed by creating line transect at some forest areas where the population of S. macropodum is known to grow naturally. Four line transects with each transect consisting of five plots with nested plots within were established to record data at four growth stages, resulting in 80 plots in total. The results showed that the Important Value Index (IVI) of S. macropodum within the floristic community at the studied area was 21.98, 13.85, 27.30, and 39.60 for tree, pole, sapling, and seedlings stages, respectively. The Shannon-Wiener Diversity Index (H) were 3.80, 3.70, 3.06 and 2.45, Index of evenness (E) are 0.94, 0.92, 0.86, 0.77 and the Index of Richness (R) are 11.76, 10.73, 6.59, 4.10 for tree, pole, sapling, and seedlings stages. This result suggests that the natural population of S. macropodum in Sikundur forest was still in good condition at all stages from tree to seedling.

scholarly journals Baseline Assessments of Wildlife Biodiversity Within Selected Areas of Central Visayas, Philippines

2021 ◽  
Vol 6 (2) ◽  
pp. 27-34
Author(s):  
RP Jose ◽  
WA Aureo ◽  
CI Narido ◽  
TD Reyes Jr ◽  
MB Sarnowski
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Diversity Index ◽  
Population Trends ◽  
Species Richness And Diversity ◽  
Natural Park ◽  
Biodiversity Inventories ◽  
Baseline Information ◽  
High Diversity ◽  
Areas Of Protection

A comprehensive inventory of faunal biodiversity was conducted within three Key Biodiversity Areas of Central Visayas. Mt. Bandilaan Natural Park (MBNP), Balinsasayao Twin Lakes Natural Park (BTLNP), and Rajah Sikatuna Protected Landscape (RSPL). Three primary wildlife groups were surveyed: bats, birds and amphibians. Species diversity and population trends were then analyzed to assess areas of biodiversity importance. RSPL generally had the highest species richness and diversity index while MBNP consistently had the lowest. When pooled. The surveyed areas resulted in a high diversity index and rate of endemicity showing the importance of multiple areas of protection. These findings can be utilized to prioritize habitat protection as well as to serve as a baseline information for future biodiversity inventories. J. Biodivers. Conserv. Bioresour. Manag. 2020, 6(2): 27-34

scholarly journals Analysis of Gastropod Diversity as a Bioindicator of Waters in Situ Ciburuy Padalarang, West Bandung Regency, West Java, Indonesia

2021 ◽  
pp. 10-19
Author(s):  
Erwin Theofilius ◽  
Zahidah Hasan ◽  
Asep Agus Handaka ◽  
Herman Hamndani
Keyword(s):  
Water Quality ◽  
Species Diversity ◽  
Sampling Method ◽  
Diversity Index ◽  
Research Area ◽  
Survey Method ◽  
Gastropod Species ◽  
Evenness Index

This study conducted to determine the water quality of Situ Ciburuy based on the structure of the gastropod community as a bioindicator. The survey method used in this study based on collecting data directly at the research area (purpose sampling method).  For instance, species and density of gastropods were descriptively analyzed, using diversity index and evenes index. For instance, The findings showed that level of water quality in  Situ Ciburuy based on gastropods bioindicators was lightly polluted. That is indicated by the low to moderate diversity of gastropods, which ranges from 1.31-1.98. The Shannon evenness index (0,73-0.95) revealed low gastropod species diversity in Situ Ciburuy, indicating low evenness of gastropod in Situ Ciburuy.

Sign in / Sign up

Export Citation Format

Share Document