scholarly journals Keanekaragaman Makroalga di Perairan Teluk Kendari dan Sekitarnya, Sulawesi Tenggara

2021 ◽  
Vol 6 (1) ◽  
pp. 55
Author(s):  
Tri Handayani
Keyword(s):  
Water Quality ◽  
Regression Analysis ◽  
Environmental Changes ◽  
Similarity Index ◽  
Marine Resources ◽  
Species Evenness ◽  
Dominance Index ◽  
Species Dominance ◽  
Seagrass Cover ◽  
Coastal Area Management

<strong>Macroalgae Diversity in Kendari Bay Waters and Surroundings, Southeast Sulawesi. </strong>Human activities around Kendari Bay cause environmental changes. It has an impact on fisheries and marine resources. Macroalgae was also affected by environmental changes, so management of macroalgae was required. The diversity of macroalgae can be used as baseline data for coastal area management. The aims of the study were to find out the diversity of macroalgae, biological indices of macroalgae and the factors that influence the diversity and abundance of macroalgae in Kendari Bay and surroundings. The study was conducted in September 2016, in eight locations, namely Lara Island, Lalow Aru, Tanjung Tiram, Baungkutoko, Watuw Atu, Bokori Island, Tapulaga, and Tenunggeu. Macroalgae samples were collected by the quadratic transect method. The data analyzed were Bray-Curtis similarity, diversity, richness, evenness, and dominance index. The correlation between water quality and abundance or diversity of macroalgae was analyzed by multiple regression analysis. A total of 38 species of macroalgae were identified consisting of three Phyllum: 15 species of Chlorophyta, 10 species of Ochrophyta, and 13 species of Rhodophyta. Tanjung Tiram and Lalow Aru have the highest similarity index of 0.93. Macroalgae in Kendari Bay have the low to moderate category of species diversity, low category of species richness, the medium to high category of species evenness, and the low to moderate category of species dominance. There was a gradient pattern of macroalgae diversity in Kendari Bay and surroundings. Seagrass cover and water quality have more influence on macroalgae diversity than macroalgae abundance in Kendari Bay and surroundings.

scholarly journals STUDI KEANEKARAGAMAN DAN STRUKTUR KOMUNITAS PERIFITON DI PERAIRAN SUNGAI COBAN RONDO MALANG

2020 ◽  
Vol 1 (2) ◽  
pp. 93-97
Author(s):  
Zainal Abidin
Keyword(s):  
Water Quality ◽  
Cluster Analysis ◽  
Community Structure ◽  
Environmental Changes ◽  
Aquatic Organisms ◽  
Dominance Index ◽  
Periphyton Community ◽  
Similarity Indices ◽  
And Cluster Analysis ◽  
Index Value

Periphyton is a community of microorganisms that live attached to or adjacent to a substrate sink. For aquatic organisms, periphyton habitats have a relatively fixed. With it is so, the changes of water quality and substrate greatly affects the composition of his life and abundance. Periphyton composition and abundance depends on the tolerance or sensitivity to environmental changes. This study aims to determine each periphyton community in responding to changes in habitat quality by way of adjustment in community structure. The methodology used in this prektikum involves taking data from four stations along the river Coban Rondo, in each station there are 3 replicates. And take measurements of factors such environments as supportive data turbidity, flow rate, pH, and depth. Analyzed using Simpson's Dominance Index to determine the type of periphyton dominance, as well as morisita similarity indices and cluster analysis. The results showed that the diversity in each station belonging to the category of high (H more than 3.32) because the obtained value of the index H' between 3.2 to 3.48. Species that dominate from the four stations is Pinularia with an average Index Value Important (IVI) 31,5.

scholarly journals Community Structure of Cucumber (Holothuroidea) in Kakara Island Village Beach Subdistrict Tobelo

2014 ◽  
Vol 1 (4) ◽  
pp. 187 ◽  
Author(s):  
Herni Gasango ◽  
Gaspar D Manu ◽  
Jan FWS Tamanampo
Keyword(s):  
Community Structure ◽  
Diversity Index ◽  
Research Work ◽  
Marine Resources ◽  
Interspecific Association ◽  
Dominance Index ◽  
Species Dominance ◽  
Holothuria Atra ◽  
Equity Index ◽  
Stichopus Horrens

Sea cucumbers are marine resources that have economically important value and one potential sufficient resources to serve nutritious meals so that the exploitation of this resource will continue to increase for food need. This can lead to changes in community structure. Sampling was done at night while the lowest ebb on August 20, 2013. The objective of this research work was to identity the species, the species to determine composition, and the population density and to know the species dominance, species diversity, and determine the form of interspecific association. Based on the results of research conducted in the District Tobelo Beach Island District Kakara Tobelo sea cucumber species found were 8 species, Holothuria atra, Actinopygia lecanora, Stichopus horrens, Bohadschia argus, Holothuria hilla, Actinopygia achinites, Holothuria pardalis, and Bohadschia marmorata. The diversity index H '= 1.9463, equity index or harmony e = 0.9359, and dominance index C = 0.1592. In addition, among 8 species associations if formed 9 pairs of positive associations and 19 pairs of negative associations.   Keywords : Structure communities, Holothuroidea, Tobelo

The planktonic ciliate community and its relationship with the environmental conditions and water quality in two bays of the Beagle Channel, Argentina

2013 ◽  
Vol 93 (7) ◽  
pp. 1753-1760 ◽  
Author(s):  
M.S. Barría de Cao ◽  
M.C. López Abbate ◽  
R.E. Pettigrosso ◽  
M.S. Hoffmeyer
Keyword(s):  
Water Quality ◽  
Environmental Conditions ◽  
Environmental Changes ◽  
Similarity Index ◽  
Beagle Channel ◽  
Transitional Area ◽  
Ciliate Community ◽  
Diverse Community ◽  
Planktonic Ciliate ◽  
The Relationship

The relationship between the ciliate community and the environmental variables in Ushuaia and Golondrina bays (54°79′S 68°22′W and 54°85′S 68°36′W, respectively) in the Beagle Channel, Argentina was investigated. The study was performed in three zones within the bays, previously delimited on the basis of their water quality. The most perturbed sites were located inshore. In order to analyse the contribution of each species to the similarity or dissimilarity between zones, similarity percentages analysis was undertaken using the Bray–Curtis similarity index. The variations in species composition and dominance in the selected zones were examined by the abundance–biomass comparison plot. We also studied the relationship between environmental and ciliates variability. The ciliate community comprised a total of 43 species belonging to 15 genera. Ciliate abundance and biomass varied temporally and spatially. A more diverse community dominated by small and opportunistic species tolerant to environmental changes was found in the most perturbed zone, while in the less stressed zone the community comprised bigger species, probably adapted to more stable environmental conditions. A community comprising species from both zones was found in a transitional area. We conclude that the structure of the community varied closely with environmental conditions.

STRUKTUR KOMUNITAS BURUNG DI TAMAN SITULEMBANG, TAMAN SUROPATI , DAN TAMAN MENTENG, JAKARTA PUSAT

Jurnal BIOMA ◽  
2017 ◽  
Vol 12 (1) ◽  
pp. 32
Author(s):  
Juliadi Nugroho
Keyword(s):  
Life Support ◽  
Bird Species ◽  
Similarity Index ◽  
Bird Communities ◽  
Bird Diversity ◽  
Species Evenness ◽  
Dominance Index ◽  
Point Count ◽  
Descriptive Method ◽  
City Park

Birds are one of the animals that can be encountered utilizing City Park as a habitat. The existence of birds in a habitat influenced by factors such as life support shelter and feed availability. Situlembang Park, Suropati Park, and Menteng Park has a different characteristic. The purpose of this research was to observe differences in the structure of bird communities in the three parks. This study was conducted in January-March 2015 using descriptive method with point count technique. Results of the research the highest abundance of species in the Situlembang park is Pycnonoctus aurigaster, while bird species in Menteng Park and Suropati Park is Passer mountanus. The highest levels of bird diversity found in Situlembang park is 2,37 then Suropati Park (2.18), and Lowest Menteng Park (2.17). Bird species evenness index in the three parks is high (0.80 to 0.81) and and the dominance index is low (0.13 to 0.15) .The level in similarity index of bird species in the three parks is high (0,80- 0.88).

scholarly journals Diversity and habitat characteristics of macrozoobenthos in the mangrove forest of Lubuk Kertang Village, North Sumatra, Indonesia

2018 ◽  
Vol 19 (1) ◽  
pp. 311-317 ◽  
Author(s):  
MOHAMMAD BASYUNI ◽  
KRISTIAN GULTOM ◽  
ANNISA FITRI ◽  
IPANNA ENGGAR SUSETYA ◽  
RIDHA WATI ◽  
...  
Keyword(s):  
Water Quality ◽  
Mangrove Forest ◽  
Diversity Index ◽  
Similarity Index ◽  
Principal Component ◽  
Habitat Characteristics ◽  
Mangrove Forests ◽  
Dominance Index ◽  
Plastic Bag ◽  
North Sumatra

asyuni M, Gultom K, Fitri A, Susetya EA, Wati R, Slamet B, Sulistiyono N, Yusriani E, Balke T, Bunting P. 2018. Diversity and habitat characteristics of macrozoobenthos in the mangrove forest of Lubuk Kertang Village, North Sumatra, Indonesia. Biodiversitas 19: 311-317. Mangrove plays an important role in coastal ecosystems including ecological, social, and economic aspects. This study aimed to determine the diversity of macrozoobenthos and water quality based on diversity index (H’), similarity Index (E), and dominance index (D) in the mangrove of Lubuk Kertang Village North Sumatra, Indonesia. The samples of macrozoobenthos (biological parameter) and water quality (physical and chemical parameters) were collected from fifteen plots in three different stations. Macrozoobenthos were collected in 1 m × 1 m transect in the mangrove forest. The biota was taken by using a shovel, inserted into a plastic bag, and identified. Results showed that eight species of macrozoobenthos were found and classified into three classes of Gastropod, Bivalvia, and Malacostraca. The highest diversity index (H′) of macrozoobenthos was found at Station II (2.39), the highest evenness index (E) was located at Station I (0.54), and the highest dominance index (D) was found at Station II (0.34). Principal component analysis (PCA) was used to determine the habitat characteristics of macrozoobenthos. PCA confirmed that station III was a habitat with suitable characteristics for the life of macrozoobenthos indicating the negative axis. The present study suggested four parameters namely salinity, clay temperature, and dissolved oxygen that should be preserved to support the survival of macrozoobenthos in the mangrove forests.

scholarly journals Surface Sediment Diatom as A Water Quality Indicator: Case Study: Cilalay and Cibuntu Ponds, Cibinong

2021 ◽  
Vol 1 (1) ◽  
pp. 38-46
Author(s):  
Aan Dianto ◽  
Taofik Jasalesmana ◽  
Luki Subehi ◽  
Ahmad Yusuf Afandi ◽  
Ardo Ramdhani
Keyword(s):  
Water Quality ◽  
Quality Indicator ◽  
Environmental Changes ◽  
Current Knowledge ◽  
Diversity Index ◽  
Botanical Garden ◽  
Lake Ecosystem ◽  
Species Evenness ◽  
Glass Coverslip ◽  
Water Quality Indicator

Diatom is classified as algae within the Division of Bacillariophyta. They are unicellular eukaryotic organisms characterized by siliceous cell walls that can be long preserved in sediments. Therefore, diatom analysis in sediment records is a potential water quality indicator for present or paleo studies. The current knowledge on the distribution and diversity of diatoms in the sediment in the urban pond is poorly known. This study aimed to identify the distribution and diversity of diatoms from the sediments of the pond. We expect to obtain a primary database of a variety of diatoms. The sediment samples were taken from Cibuntu and Cilalay Ponds in Cibinong Botanical Garden. Sediments were digested using HCL and H2O2. The resulting diatom solution was dried and transferred onto glass coverslip, which subsequently mounted onto microscope slides using Naphrax (Refraction index 1.7). Diatom identification was examined using a light microscope at 1,000x magnification. Diatom communities in Cibuntu Pond were dominated by species Aulacoseria ambigua, Eunotia bilunaris, Cymbopleura sp, Discostella stelligera, and Rossithidium sp with diversity index of 2.4 and species evenness of 0.8. Whereas, species Fragilaria sp, Eunotia monodon, Navicymbula pusilla, Eunotia bilunaris, and Pinnularia viridis were predominant in Cilalay Pond with diversity index of 1.6 and species evenness of 0.5. Based on the diatom community, Cibuntu Pond is eutrophic indicated by the occurrence of Aulacoseria ambigua, whereas Cilalay Pond is meso-eutrophic indicated by the dominance of Fragillaria. This exploratory survey provides the first inventory of diatom assemblage in Cibuntu and Cilalay Ponds for roughly inferring the environmental changes in a shallow lake ecosystem.

scholarly journals Gastropod Community In The Intertidal Of Likupang Coast, Kampung Ambon, East Likupang District, North Minahasa Regency

2018 ◽  
Vol 6 (2) ◽  
pp. 58
Author(s):  
Evelina Hermanses ◽  
Jety K Rangan ◽  
Alex D Kambey
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Species Evenness ◽  
Dominance Index ◽  
Gastropod Species ◽  
Species Dominance ◽  
Coral Sand ◽  
Density Analysis ◽  
High Species Richness ◽  
Richness Index

This study was aimed at finding Gastropod species and studying the community structure in the coastal area of Kampung Ambon, Likupang, through species density, diversity, evenness and dominance analyses. It was carried out in August 2017. The study employed transect method with quadrats by placing the on the area covered with coral-sand mix substrates. Density analysis found total numbers of 168 individuals with mean density of 7 ind/m². Spesies of the highest indiviual numbers was Cypraea annulus with a total of 98 individuals. Species diversity (H’) was 0.632773. This value reflects that the species diversity is moderate. Species richness index was R ˃ 4 reflecting that there is high species richness. Species evenness index was ˃ 0,5 meaning that the gastropods in the area are sufficiently even. Dominance index ranged from 0.27 to 0.47 indicating no species dominance in the study site.Key Words : Gastropod,  density, diversity, evenness, dominance ABSTRAKTujuan dari penelitian ini adalah mempelajari jenis-jenis gastropoda apa saja yang ditemukan dan mempelajari struktur komunitas melalui analisis kepadatan, keanekaragaman, kekayaan, kemerataan, dan dominasi spesies di daerah intertidal perairan Kampung Ambong Likupang. Penelitian dilaksanakan pada bulan Agustus 2017.  menempatkan  pada  satu  macam   habitat   yaitu  kawasan   yang didominasi oleh substrat karang yang bercampur pasir. Hasil analisis kepadatan menunjukkan bahwa di ketiga transek pengamatan jumlah individu yang diperoleh berjumlah 168 individu dengan kepadatan rata-rata per kuadrat 7 ind/m². Spesies dengan individu yang terbanyak adalah Cypraea annulus dengan jumlah individu sebanyak 98 individu. Keanekaragaman spesies yang diperoleh yaitu H’ = 0.632773. Nilai ini tergolong pada tingkat keanekaragaman sedang. Indeks kekayaan diperoleh nilai R ˃ 4, kriteria ini tergolong pada indeks kekayaan yang tinggi. Indeks kemerataan spesies diperoleh nilai ˃ 0,5 yang berarti spesies yang ada cukup merata, dan indeks dominasi diperoleh pada kisaran 0,27 – 0,47 yang menunjukkan tidak ada dominansi spesies di lokasi penelitian.Kata Kunci : Gastropoda, kepadatan, keanekaragaman, kekayaan, dominasi

Seagrass Ecosystems of Andaman and Nicobar Islands: Status and Future Perspective

2020 ◽  
Vol 7 (4) ◽  
pp. 169-174
Author(s):  
Chatragadda Ramesh ◽  
Raju Mohanraju
Keyword(s):  
Water Quality ◽  
Primary Production ◽  
Environmental Changes ◽  
Future Perspective ◽  
Marine Biodiversity ◽  
Seagrass Beds ◽  
Seagrass Meadows ◽  
Seagrass Ecosystem ◽  
Seagrass Ecosystems ◽  
Nicobar Islands

Seagrasses are unique marine flowering plants that play an important ecological role by yielding primary production and carbon sequestration to the marine environment. Seagrass ecosystems are rich in organic matter, supporting the growth of bio-medically important epi and endophytic microorganisms and harbor rich marine biodiversity. They are an essential food source for endangered Andaman state animal Dugongs. Seagrasses are very sensitive to water quality changes, and therefore they serve as ecological bio-indicators for environmental changes. The benthic components in and around the seagrass beds support a significant food chain for other Micro and organisms apart from fishery resources. The epiphytic bacterial communities of the leaf blades support the sustenance against the diseases. Recent reports have shown that the loss of seagrass beds in tropical and temperate regions emphasizes the depletion of these resources, and proper management of seagrass is urgent. The decline of seagrass will impact primary production, biodiversity, and adjacent ecosystems, such as reefs. Therefore, restoring the seagrass meadows could be possible with effective implementing management programs, including seagrass meadows in marine protected areas, restoration projects, seagrass transplantation, implementation of legislative rules, monitoring coastal water quality and human activities in the coastal zone. Lacunas on the seagrass ecosystem management in Andaman & Nicobar Islands are addressed.

scholarly journals Phytoplankton community structure and it’s relationships with water quality in Bangka Island, Indonesia

2021 ◽  
Vol 26 (1) ◽  
pp. 37-44
Author(s):  
Muh Yusuf ◽  
Robin Robin ◽  
Wahyu Adi ◽  
Mu’alimah Hudatwi ◽  
Widianingsih Widianingsih ◽  
...  
Keyword(s):  
Water Quality ◽  
Phytoplankton Community ◽  
Environmental Changes ◽  
Total Suspended Solid ◽  
Mining Area ◽  
Suspended Solid ◽  
Test Analysis ◽  
Mining Site ◽  
Average Value ◽  
Primary Producer

Phytoplankton plays an important role in primary productivity in marine environment. Various environmental changes in coastal area will impact the water quality and their phytoplankton compositions. The purpose of this study is to examine the abundance of phytoplankton from two different sites, i.e Tanah Merah (close to mining site) and Semujur Island (away from mining site) in Bangka Island. Phytoplankton and water sample were collected on June- August 2018. Water quality was measured using water quality checker, whereas the phytoplankton was identified under the microscope with a magnification of 100x. Non-parametric Kruskal test and T-test analysis was performed to determine the abundance, diversity, uniform, and dominance of phytoplankton between Sites, respectively. Statistical analyses showed the abundance of phytoplankton at Semujur Island was significantly higher than that at Tanah Merah (p = 0.003). In additions the diversity, uniform, and dominance were also significantly different between sites (all p <0.05). In Semujur Island, Diatoms (Thalassiothrix, Chaetoceros and Thalassionema) were more dominants than the Dinophyceae group. However, in Tanah Merah, the genera Ceratium belong to class Dinophyceae was more dominant than the class Bacillariophyceae. These results performed that the phytoplankton in Tanah Merah and Semujur Island was affected by environment, in this case the mining area. The water quality in Semujur Island (non-mining Area) might have good quality than in Tanah Merah (mining area). The average value of turbidity and Total Suspended Solid in Tanah Merah Waters causes low abundance of phytoplankton. It can be concluded that tin mining can disrupt the abundance and composition of phytoplankton as a primary producer of waters.

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