Diversity of mollusks (bivalves and gastropods) in degraded mangrove ecosystems of Kolaka District, Southeast Sulawesi, Indonesia

Abstract. Hasidu LOAF, Jamili, Kharisma GN, Prasetya A, Maharani, Riska, Rudia LOAP, Ibrahim AF, Mubarak AA, Muhasafaat LO, Anzani L. 2020. Diversity of mollusks (bivalves and gastropods) in degraded mangrove ecosystems of Kolaka District, Southeast Sulawesi, Indonesia. Biodiversitas 21: 5884-5892. Mollusks are one of the mangrove organisms whose classes are bivalves and gastropods. It plays an important role in mangrove and marine ecosystems as filter feeders, predators, and herbivores. This study aims to knows the diversity and abundance of mollusks (bivalves and gastropods) in several mangrove ecosystems in the Kolaka coastline as well as the similarity of these locations. This study was conducted in mangrove ecosystems of Induha Village, Mangolo Village, Tahoa Village, and Towua Village of Kolaka District, Southeast Sulawesi, Indonesia, from July to August 2019. This is a transect method stretched along a 100 m line perpendicularly from the seaward. The size of the mollusks subplot was 1 m2 and placed along the line transect. Each line transect comprises 10 subplots. To analyze the diversity index, evenness index, and its abundance, Kaleida Graph 4.0 version was used. This research indicates that the mollusks consist of 4 families of bivalves with 6 species and 10 families of gastropods with 182 species. It also found out 23 species of mollusks scattered to each location. The molluscan species which spread in all four mangrove ecosystems were Terebralia sulcata, Nerita planospira, and Batillaria multiformis. In Induha, the mollusks species were Anadara notabilis and Drupella margariticola. Meanwhile, Saccostrea cucullata, Pirenella incisa, Clithon oualaniensis, and Clithon pulchellum were only found in Towua. The diversity index of bivalves in each location was categorized as low diversity index category, as well as gastropods were categorized as medium diversity index. The highest diversity index of gastropods was in Induha (H' = 1.96). It was supported by the good mangrove ecosystem for mollusks' habitat. The lowest diversity index of gastropods was in Towua (1.41). This research depicts that three kinds of species with high abundance rate whose rates were >1 ind/m2are located in two different locations namely; P. incisa (3.9 ind/m2) and S. cucullata (3.2 ind/m2) in Towua and followed by B. multiformis (2 ind/m2) and Isognomon ephippium (1.2 ind/m2) in Mangolo.

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KEANEKARAGAMAN DAN KELIMPAHAN MAKROZOOBENTHOS PADA EKOSISTEM MANGROVE DESA DARUBA PANTAI KABUPATEN PULAU MOROTAI

JURNAL ENGGANO ◽

10.31186/jenggano.5.1.64-77 ◽

2020 ◽

Vol 5 (1) ◽

pp. 64-77

Author(s):

Djainudin Alwi ◽

Sandra Hi. Muhammad ◽

Henderson Herat

Keyword(s):

Relative Abundance ◽

Diversity Index ◽

Mangrove Ecosystem ◽

Natural Food ◽

Ecological Diversity ◽

Ecological Index ◽

Quadrat Sampling ◽

Index Analysis ◽

Mangrove Ecosystems ◽

Secondary Consumers

Ekosistem mangrove berperan sebagai habitat berbagai jenis satwa, salah satunya yaitu makrozoobenthos. Makrozoobenthos berperan sebagai konsumen primer dan ada pula yang berperan sebagai konsumen sekunder atau konsumen yang menempati tempat yang lebih tinggi. Pada umumnya, Makrozoobenthos merupakan makanan alami bagi berbagai satwa perairan yang berukuran besar. Penelitian ini bertujuan menganalisis kelimpahan makrozoobenthos dan menganalisis struktur komunitas makrozoobenthos di kawasan ekosistem mangrove Daruba Pantai. Penelitian ini dilaksanakan pada bulan November sampai Desember 2019 yang berlokasi di kawasan Mangrove Desa Daruba Pantai. Pengambilan data menggunakan metode sampel kuadrat (Quadrat Sampling) dengan ukuran plot 1x1 m2. Metode analisis data menggunakan analisis indeks ekologi seperti kelimpahan individu, kelimpahan relatif, keanekaragaman jenis, keseragaman dan dominasi. Hasil penelitian menunjukan kelimpahan individu makrozoobenthos tertinggi berada pada stasiun ke I yaitu 33,333 (Ind/m2) dan terendah berada di stasiun I dan II yaitu Polymesoda bengalensis 1,111 (Ind/m2). Sedangkan Kelimpahan Relatif tertinggi ada di stasiun II yaitu Episesarma (0,200 %) dan terendah ada di stasiun I dan II yaitu Polymesoda bengalensis (0,007 %). Hasil analisis indeks ekologi Keanekragaman (H’) stasiun I yaitu (2,146), stasiun II (2,158) dan stasiun III (2,131) termasuk dalam kategori sedang. Indeks Keseragaman (E) pada stasiun I berkisar (0,895), stasiun II (0,900), sedangkan pada stasiun III (0,925) termasuk dalam kategori tinggi. Indeks Dominasi pada stasiun I yaitu (0,132), stasiun II (0,132) dan pada stasiun III yaitu (0,130) termasuk dalam kategori rendah.THE DIVERSITY AND ABUNDANCE OF MACROZOOBENTHOS IN MANGROVE ECOSYSTEMS AT DARUBA VILLAGE COASTAL PULAU MOROTAI REGENCY. Mangrove ecosystems play a role as a habitat for various species of animals, one of which is macrozoobenthos. Macrozoobenthos acts as the primary consumer and some have a role as secondary consumers or consumers who occupy a higher place. In general, Macrozoobenthos is a natural food for a variety of large aquatic animals. This research aims to analyze the abundance of macrozoobenthos and analyze the structure of the macrozoos community in the area of the Daruba Coastal mangrove ecosystem. This research was conducted from November to December 2019 located in the Mangrove area of Daruba Pantai Village. Retrieval of data using the method of quadratic sampling (Quadrat Sampling) with a plot size of 1x1 m2. Data analysis methods use ecological index analysis such as individual abundance, relative abundance, species diversity, uniformity, and dominance. The results showed the highest abundance of macrozoobenthos individuals were at a station I which was 33,333 (Ind / m2) and the lowest was at stations I and II namely Polymesoda bengalensis 1.111 (Ind / m2). While the highest relative abundance in at station II, Episesarma (0.200%) and the lowest are at a station I and II, Polymesoda bengalensis (0.007%). The results of the analysis of the Ecological diversity index (H ') of Station I, namely (2,146), Station II (2,158) and Station III (2,131) are included in the medium category. The Uniformity Index (E) at a station I ranges (0.895), station II (0.900), while at station III (0.925) is included in the high category. The Domination Index at a station I (0.132), station II (0.132) and at station III (0.130) are in a low category.

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ASSOCIATION OF LOKAN SHELL Geloina erosa, SOLANDER 1786 AND MANGROVE AT KAHYAPU COASTAL AREA OF ENGGANO ISLAND, BENGKULU PROVINCE

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.29244/jitkt.v8i2.15828 ◽

2017 ◽

Vol 8 (2) ◽

pp. 613-624

Author(s):

Nella Tri Agustini ◽

Dietriech G. Bengen ◽

Tri Prartono

Keyword(s):

Coastal Area ◽

Organic Materials ◽

Mangrove Ecosystem ◽

Line Transect ◽

Mangrove Ecosystems ◽

Mangrove Vegetation

Lokan shell Geloina erosa closely related to mangrove ecosystem in Enggano island. Mangrove is one supplier of organic materials required by Lokan shell. The research conducted in September 2015 - January 2016 at mangrove ecosystems in Kahyapu coastal area, aims to analyse lokan shells Geloina erosa conditions and its association with mangrove ecosystems. Sampling of mangrove vegetation was taken using line transect and lokan shell sampling using plot in mangrove ecosystem. The results show that mangrove condition of the Kahyapu coastal area was in healthy condition for the growth of lokan shell. Lokan shell are significantly assosiated with mangrove in Kahyapu coastal area of Enggano Island.

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Study on Ecological Economic Benefits of Mangrove in Sauk Village, Lolak Sub-district, Bolaang Mongondow District

JURNAL ILMIAH PLATAX ◽

10.35800/jip.5.2.2017.15911 ◽

2017 ◽

Vol 5 (2) ◽

pp. 170

Author(s):

Muhammad Yusran Boynauw ◽

Ridwan Lasabuda ◽

Unstain N. W. J. Rembet

Keyword(s):

Diversity Index ◽

Economic Value ◽

Mangrove Ecosystem ◽

Economic Benefits ◽

Ecological Condition ◽

Indirect Benefit ◽

Ecological Value ◽

Sonneratia Alba ◽

Low Diversity ◽

Total Economic Value

This study was carried out in Sauk village, Lolak district, Bolaang Mongondow regency on June 10th – August 11th, 2016, around mangrove ecosystem at the geographic position of 00 50’ 10’’ N and 1230 56’ 40’’E. It was aimed to a) assess the ecological condition of the mangrove ecosystem of Sauk village based upon the community structure and (b) estimate the economic value of the mangrove ecosystem from direct and indirect benefit. Results found that the ecological value of the mangrove ecosystem was categorized as “rare” (<1000 trees/Ha), with low diversity index (< 2), and Sonneratia alba had very important role with the highest IVI. Total economic value was IDR. 1,116,830,000 per year based upon the benefit value.Keywords : economic benefit, ecology, mangrove ecosystem, Sauk village. ABSTRAKPenelitian ini dilakukan di Desa Sauk Kec, Lolak Kab. Bolaang Mongondow pada tanggal 10 juni–11 Agustus 2016, di sekitaran kawasan ekosistem mangrove Desa Sauk yang terletak pada posisi geografis N 00 50’ 10’’ dan E 1230 56’ 40’’. Tujuan penelitian ini adalah : (a) Menilai kondisi ekologi ekosistem mangrove di Desa Sauk berdasarkan struktur komunitas. (b) Menghitung nilai ekonomi ekosistem mangrove berdasarkan nilai guna langsung dan tidak langsung. Nilai ekologi ekosistem mangrove di Desa Sauk dikategorikan “jarang” (<1000 pohon per Ha), dengan indeks keanekaragaman rendah (< 2) dan jenis yang yang sangat berperan adalah Sonneratia alba yang memliki INP tertinggi. Sedangkan nilai ekonomi total berdasarkan nilai manfaat sebesar Rp.1.116.830.000 per tahun.Kata Kunci : Manfaat ekonomi, ekologi ekosistem mangrove Desa Sauk

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Kajian Perubahan Bioekologi pada Restorasi Ekosistem Mangrove di Segara Anakan Cilacap

Biosfera ◽

10.20884/1.mib.2015.32.1.291 ◽

2015 ◽

Vol 32 (1) ◽

pp. 19 ◽

Cited By ~ 1

Author(s):

Erwin Riyanto Ardli ◽

Ani Widyastuti ◽

Edy Yani

Keyword(s):

Environmental Factors ◽

Mangrove Ecosystem ◽

Survey Method ◽

First Year ◽

Shrub Species ◽

Mangrove Restoration ◽

Mangrove Ecosystems ◽

Low Diversity ◽

Biodiversity Analysis ◽

Cluster Random Sampling

Mangroves are coastal ecosystems that have a very large role for humans and ecosystems in the vicinity. Mangrove condition in Indonesia, including in Segara Chicks Cilacap experiencing enormous pressure resulting in damage to the mangrove ecosystem. Mangrove restoration is the process of return of mangrove ecosystems of the conditions are broken into previously conditioned as well. The general objective of this study was 1) determine the conditions and amendments BioEkologi mangrove ecosystem restoration in the area of results Segara Chicks. Specific objectives in the study the first year is to determine: 1) the community structure of mangrove ecosystems (vegetation and fauna associations) at a restoration site in the region Segara Chicks, 2) the spatial variation community mangrove ecosystem in the area of restoration, and 3) the condition of the environmental factors that support the mangrove restoration in the region Segara Chicks. The method used was survey method with the technique of sampling cluster random sampling. The data obtained were analyzed multivatiate covering biodiversity analysis, cluster analysis, multi-dimensional sclae (MDS), and Bio-env using PRIMER-E program. The study shows the restoration of mangrove vegetation in the region have relatively low diversity (H '<1), and in areas that have not been restored only dominated shrub species (Acanthus and Derris). Environmental factors generally favor mangrove Vegetasia life, and have the same tendency for each restoration location with a level of similarity> 95%.

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The Perceptions of Local Community's About Diversity of Mangrove Ecological Potential for Ecotourism Development in the South Coast of Lombok Island, Indonesia

JURNAL BIOLOGI TROPIS ◽

10.29303/jbt.v21i2.2741 ◽

2021 ◽

Vol 21 (2) ◽

pp. 480

Author(s):

Lalu Raftha Patech ◽

Kumala Ratna Dewi ◽

Zulhalifah Zulhalifah ◽

Abdul Syukur ◽

Jamaluddin Jamaluddin

Keyword(s):

Diversity Index ◽

Mangrove Ecosystem ◽

Marine Biota ◽

Ecological Data ◽

Mangrove Species ◽

Association Index ◽

Mangrove Ecosystems ◽

Bird Watching ◽

By Products ◽

Mangrove Conservation

The utilization of the coastal environment is still dominated by-products and has not yet switched to ecosystem service products, such as the use of mangrove ecosystems as ecotourism. This study aims to assess the local community's perception of the potential diversity that becomes an object for the community's economy. The research method uses surveys, observations, and interviews for social data, while the ecological data use transect and quadratic methods. Furthermore, data analysis used descriptive statistics. In addition, ecological data were analyzed using density (Ki), relative frequency (FR), diversity (H') of mangroves, and ecological indexes (Diversity (H'), Evenness (E), Dominance (D)). The results of the study found six mangrove species, ten echinoderm species, and thirteen bivalves. The highest diversity index (H') was in Poton Bako 1.80 and the Evenness index ranged from 0.80 – 0.98 with a stable category. Biota relative dominance the association index of echinoderms is high 0.79–0.11. Meanwhile, the bivalves Dominance index of 0.03-0.11 was low. In addition, local community's perception of mangrove conservation for ecotourism, 63% of the community stated, 7% is not possible and 30% is not. The feasible value of mangrove development is 62%, 17% is not feasible and 21% does not know. The priority developed by Eduwisata is 48%, Bird Watching is 20% and Tracking is 32%. The conclusion is that the choice of using mangrove ecosystem services can be developed as a policy in overcoming economic threats and the vulnerability of marine biota as well as solutions for local communities.

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Struktur Komunitas Collembola pada Tiga Tipe Habitat Sepanjang Daerah Aliran Sungai Brantas Hulu Kota Batu

Bioedukasi Jurnal Pendidikan Biologi ◽

10.20961/bioedukasi-uns.v9i1.3886 ◽

2016 ◽

Vol 8 (2) ◽

pp. 45

Author(s):

HUSAMAH HUSAMAH ◽

FATCHUR ROHMAN ◽

HEDI SUTOMO

Keyword(s):

Community Structure ◽

Relative Abundance ◽

Diversity Index ◽

Soil Sampling ◽

Species Diversity Index ◽

Descriptive Research ◽

Study Results ◽

Evenness Index ◽

Low Diversity ◽

Biology Laboratory

Collembola is one of a group of animals that generally live in the soil. Collembola has an important role in the ecosystem due to its function as a subsystem of consumer and decomposition that can be used as bio-indicators. Changing in habitat in the upstream of Brantas River Basin is cause disruption for Collembola community. This is a descriptive research, aims to uncover the information of community structure, including the type found, diversity, evenness, and relative abundance of Collembola in three type habitats (forest, agricultural, and residential). Soil sampling conducted in each type of habitat using TBSF methods. Identification of Collembola samples conducted at the Biology Laboratory of University of Muhammadiyah Malang and verified at Basic Entomology Laboratory, Gadjah Mada University. This study results are; (1) the number of Collembola were found in forest were 21, agriculture were 5, and residential were 17. (2) There is difference in descriptive diversity of Collembola in forest, agricultural, and residential. Collembola species diversity index of forest higher (2.78) compared to agriculture (1.16) and residential (2.42). Forest and residential habitat have moderate diversity, while agriculture has a low diversity. (3) There is difference in descriptive evenness of Collembola in forest, agricultural, and residential. Evenness index Collembola in forest was higher (0.91) than agriculture (0.72) and residential (0.85). Evenness of Collembola in residential is higher than agriculture. All types of habitat, including having a high evenness. (4) There are differences in the relative abundance of descriptive Collembola in forest, agricultural, and residential. Relative abundance of forest, agricultural, and residential varied. The highest relative abundance in forest is Hypogastrura consanguinea, Ascocyrtus sp, and Homidia cingula. The highest relative abundance in agriculture is Pseudachorutes javanicus, Isotomurus palustris, and Ascocyrtus sp. The highest relative abundance in residential is Ascocyrtus sp., Cryptopygus thermophilus, and Isotomurus palustris.

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Keanekaragaman dan Pola Sebaran Moluska (Gastropoda dan Bivalvia) yang Berasosiasi Pada Ekosistem Mangrove di Pesisir Selatan Lombok Timur

Jurnal Sains Teknologi & Lingkungan ◽

10.29303/jstl.v0i0.274 ◽

2021 ◽

pp. 223-242

Author(s):

Wayan Pasek Eka Sedana Putra ◽

Abdul Syukur ◽

Didik Santoso

Keyword(s):

Diversity Index ◽

Pearson Correlation ◽

Mangrove Ecosystem ◽

Pearson Correlation Coefficient ◽

Mangrove Forests ◽

Southern Coast ◽

Mangrove Species ◽

Mangrove Ecosystems ◽

Independent Variable ◽

Mollusk Species

Mangrove ecosystems have an important role in coastal areas. Mangroves have a function as a shelter, foraging for food, and breeding various aquatic biota. Damage to mangrove forests can cause the service of mangrove ecosystems to decrease, especially for mollusk life. Mollusks are one of the associated biotas of mangroves whose life is influenced by mangrove forests. Therefore, the purpose of this study was to determine the diversity of mollusks and the relationship between mollusk density and mangrove density in the mangrove ecosystem of the southern coast of East Lombok. A sampling of mollusks used the quadrate sampling method by purposive sampling by taking into account the mangrove species contained in the observation plot. The collected data were analyzed by diversity index, distribution pattern, association, and Pearson correlation coefficient. Then a simple linear regression analysis was performed with the independent variable (x) mangrove density and the dependent variable (y) mollusk density. The results of this study were the discovery of 22 species of mollusks consisting of 17 species of gastropods and five species of bivalves. The density of mollusks in the mangrove ecosystem of the southern coast of East Lombok is 44.50±2.63 ind./m2. The diversity index at the study site was classified as moderate, with a value ranging from 1.99 to 2.46. The distribution pattern of mollusks at the research site is clustered with an Id value > 1. There are eight mollusk species associated with three mangrove species from 22 mollusk species found. The linear regression equation y = 0.084x – 0.2963 with a Pearson correlation coefficient (r) 0.95 describes a strong relationship between the independent variable (x) mangrove density and the dependent variable (y) mollusk density. This study concludes that there is a significant relationship between mangrove density and mollusk density as indicated by F-hit(41.01) > F-table (7.70) and P-value (0.003) < (0.05).

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Dominansi dan Diversitas Lamun dan Makrozoobenthos pada Musim Pancaroba di Pantai Bama, Taman Nasional Baluran, Situbondo [Dominance and Diversity of Seagrass and Macrozoobenthos on Transition Season in Bama Beach, Baluran National Park, Situbondo]

Jurnal Ilmiah Perikanan dan Kelautan ◽

10.20473/jipk.v8i1.11191 ◽

2019 ◽

Vol 8 (1) ◽

pp. 36

Author(s):

Mohammad Faizal Ulkhaqa ◽

Sapto Andriyono ◽

Muhammad Hanif Azhara ◽

Hapsari Kenconojatia ◽

Daruti Dinda Nindarwi ◽

...

Keyword(s):

National Park ◽

Diversity Index ◽

Line Transect ◽

Dominance Index ◽

Transition Season ◽

A Value ◽

Low Diversity ◽

The One ◽

Index Value ◽

Dry And Rainy Seasons

AbstrakLamun merupakan tanaman berbiji terbuka yang mampu tumbuh dan beradaptasi dengan lingkungan bersalinitas tinggi serta dapat berasosiasi dengan benthos. Keberadaan lamun di perairan merupakan salah satu indikator tingkat kesuburan dan produktivitas perairan. Terdapat perbedaan dominansi antara musim hujan dan musim kemarau, sehingga enelitian ini bertujuan untuk mengidentifikasi dan menghitung dominansi dan keanekaragaman lamun dan makrozoobenthos pada musim pancaroba di Pantai Bama, TN Baluran, Situbondo. Metode penelitian yang digunakan yaitu line transect quadran dengan 5 line transek quadran yang masing-masingnya dipasang 5 plot transek. Ditemukan jenis lamun yang memiliki nilai kelimpahan tertinggi di Pantai Bama, TN Baluran pada musim pancaroba yaitu C. serrulata dengan nilai 48,90% , dan makrozoobenthos dari genus Holothuria dengan nilai 52,06%. Nilai Indeks dominansi (D) mengkategorikan Pantai Bama, TN Baluran dalam perairan dengan dominansi sedang. Sedangkan berdasarkan Indeks keanekaragaman (H’) mengkategorikan Pantai Bama, TN Baluran dalam perairan dengan keanekaragaman rendah. Musim peralihan berpengaruh terhadap jenis, kelimpahan relatif, indeks dominansi dan indeks keanekaragaman lamun dan makrozoobenthos di Pantai Bama, TN Baluran dibandingkan musim kemarau dan hujan. Perlu dilakukan survei secara berkala untuk mengetahui keanekaragaman organisme yang berkaitan dengan produktivitas perairan. AbstractSeagrass is the one of plants that can grow and adaptataion with high salinity environment and associated with benthos. Seagrass presence that indicate the productivity and prosperity in waters environtment. Found a different dominance between rainy season and dry season, so The aims of this study to identify and count dominance and diversity of seagrass and macrozoobenthos on the transition season in Bama Beach, TN Baluran, Situbondo. The method was used is line transect quadran with 5 quadran each of which installed 5 plot transect. Seagrass species was founded that have the highest abundance values in Bama Beach, TN Baluran the transitional season is C. serrulata with a value of 48.90%, and the macrozoobenthos that found from genus Holothuria with a value of 52.06%. Dominance index value (D) categorize Bama Beach, TN Baluran with moderate dominance. While based on the diversity index (H ') categorizes Bama Beach, TN Baluran with low diversity. Transitional seasons affect the type, relative abundance, dominance index and seagrass diversity index and macrozoobenthos in Bama Beach, TN Baluran than the dry and rainy seasons. Needed to investigate the diversity of organism that related to primary produktivity.

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The Denser Canopy of Mangrove Drives the Structure of Insect Communities

Tropical Life Sciences Research ◽

10.21315/tlsr2020.31.3.6 ◽

2020 ◽

Vol 31 (3) ◽

pp. 77-90

Author(s):

Yendra Pratama Setyawan ◽

Wakhid Wakhid ◽

Suhadi Suhadi

Keyword(s):

Relative Abundance ◽

Diversity Index ◽

Canopy Cover ◽

Abundant Species ◽

Mangrove Ecosystem ◽

Shannon Diversity Index ◽

Shannon Diversity ◽

Evenness Index ◽

Age Variation ◽

Richness Index

Mangrove restoration in Trenggalek, East Java has resulted an age variation of mangrove ecosystem. Diverse species of insects predominantly found in mangroves were collected using yellow pan traps, swipe nets and by direct picking from three different sites. This research was conducted from April until August 2015. There are 9,181 individual insects associated with mangroves comprised of 42 species from 31 families and eight orders. The first site or the 15 years old mangrove (66.22% canopy cover) indicated the highest Shannon diversity index at 2.54, Evenness index of 0.32 and Margalef richness index of 4.84. The lowest diversity was recorded in the third site or the five years old mangrove (19.65% canopy cover), with the Shannon diversity index at 2.28, Evenness index at 0.26 and Margalef richness index at 4.59. The most abundant species located was the Eristena mangalis, with 1,724 individuals (relative abundance of 18.78%), followed by Monolepta sp. with 1,649 individuals (relative abundance of 17.96%). These are the phytophagous insects associated with mangrove leaves. This study concluded that the older mangrove ecosystem have a denser canopy that supports insect life.

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Community of Seaweeds on Cemara Beach East Lombok

JURNAL BIOLOGI TROPIS ◽

10.29303/jbt.v20i2.1926 ◽

2020 ◽

Vol 20 (2) ◽

pp. 290

Author(s):

Intan Mushlihah ◽

Lalu Japa ◽

I Gde Mertha ◽

Ahmad Raksun

Keyword(s):

Cluster Analysis ◽

Species Diversity ◽

Diversity Index ◽

Environmental Parameters ◽

Line Transect ◽

Species Evenness ◽

Species Diversity Index ◽

Seaweed Species ◽

Number Of Species ◽

Evenness Index

Seaweeds (macroalgae) are a marine biological resource that have an important role in aquatic ecosystems and for society. The aim of this research was to determine community of seaweeds in Cemara Beach, East Lombok Regency.Data were collected at four observation points using a method of combinationof the line transect and quadrat. Seaweeds community data were analyzed using density parameters, important values, species diversity index, and species evenness index. The similarity percentage between transects was determined based on the Bray-Curtis cluster analysis using biodiversity program-version 2. In Cemara Beach there were 24 species of macroalgae which memberof 3 divisions, 11 orders and 15 families. Chlorophyta was a division with highest number of species. The number of species for Chlorophyta was 14 species, Rhodophyta division was 7 species, and Phaeophyta division 3 species. The species with highest density is Enteromorpha sp.,25.1 clumps/m2. Ulva lactuca is the species with the highest important value (72.69%). Diversity and evenness index in Cemara Beach seaweed species were 1,868 (medium category) and 0,699 (almost evenly distributed).The results of cluster analysis based on environmental parameters, species similarity and number of clumps of seaweed species, diversity index, and species evenness index indicate that seaweed in Cemara Beach can generally be divided into 2 groups.

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