PERAN REFUGIA SEBAGAI MEDIA KONSERVASI ARTHROPODA DI LAHAN PADI DESA DELIKSUMBER

Rice is basic neet for Indonesia people. East Java experienced decrease rice production 2% in 2014, the problem was insect pest. Insecticides are dangerous that replaced use refugia attracting biological agens. Purpose of the research to discover the role of refugia as conservation medium in suppressing pets attacks and increasing the diversity arthropod populations in rice fields. This study uses a direct insect sampling method and uses traps such as sweep nets, yellow traps, pitfall traps and light traps. Identification of insects using an introduction to the study insect and iNaturalist. Analysis of the observational data quantitatively by calculating the species diversity index (H’), evenness index (E), Richness index (R) and dominance index (C) then tabulated using excel. observations indicate the number of insects found on land A (rice with refugia) was 5661 individuals consisting of 12 ordo, 61 family and 94 species. Meanwhile on land B (rice without refugia) was 3,198 individuals consisting of 11 ordo, 43 family and 56 species. Refugia affected the population of biological agens more on land A was 2707 individuals than on land B was 1215 individuals. While the pest population on land A much less as 364 individuals than on land B as 763 individuals. Tabulation from the calculation of the species diversity index as 0.142 and 0.118, the species evenness index as 0.030 and 0.025, the dominance index of 0.0004 and 0.0013 is classified as low, while the species richness index of 10.76 and 6.82 is classified as high.

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Study on the community structure of macrozoobenthos in Kobok and Kao estuaries, Kao Bay, North Halmahera

AQUATIC SCIENCE & MANAGEMENT ◽

10.35800/jasm.0.0.2014.7309 ◽

2014 ◽

pp. 62

Author(s):

Najib Hi Talib ◽

Lawrence J.L Lumingas ◽

Markus T Lasut

Keyword(s):

Community Structure ◽

Species Diversity ◽

Diversity Index ◽

Factorial Correspondence Analysis ◽

Species Diversity Index ◽

Dominance Index ◽

Sediment Types ◽

As Species ◽

Evenness Index ◽

Community Variables

This study aims to assess the community structure of macrozoobenthos in the estuary of Kobok and Kao rivers, Kao Gulf waters. Sampling was carried out in October 2014 at 10 sampling stations in both estuaries. Variables examined in this study were community variables, such as species composition and abundance, including species diversity index Shannon-Wiener (H '), species richness (SR) index, evenness index (J'), Berger-Parker dominance index (d) and 'assemblage' (group) of the macrozoobenthos using multivariate analysis such as classification and analysis of factorial correspondence analysis (AFK). This study obtained a total of 757 individuals of 61 species. Diversity Index (H ') ranged from 1.62 to 3.96, Evenness index (J ') from 0.63 to 1.26., richness (SR) index ranged from 2.83 to 4.45 and dominance index (d) 0.16 to 0.47. Classification analysis separated 4 interconnecting groups at the station or resident species that were in the similar sediment types. Correspondence Factorial Analysis for the station variables mostly responsible for the axial formation was stations mostly contributing to the formation of axes as the characteristic station of the axes, because it had relatively high contribution. Penelitian ini bertujuan untuk menilai struktur komunitas makrozoobentos di muara Sungai Kobok dan muara Sungai Kao perairan Teluk Kao. Pengambilan sampel dilaksanakan pada bulan oktober 2014 pada 10 stasiun sampling di kedua muara. Variabel yang dikaji dalam penelitian ini adalah variabel komunitas seperti komposisi dan kelimpahan spesies termasuk indeks keanekaragaman spesies Shannon-Wiener (H’), indeks kekayaan spesies (SR), indeks kemerataan spesies (J’), indeks dominasi Berger-Parker (d) serta ‘assemblage’ (grup) makrozoobentos dengan menggunakan analisis multivariate seperti analisis klasifikasi maupun analisis faktorial koresponden (AFK). Penelitian ini diperoleh total 757 individu yang termasuk dalam 61 spesies. Nilai Indeks Keanekaragaman (H’), berkisar dari 1.62-3,96. Nilai Indeks Kemerataan Spesies (J’), berkisar dari 0,63-1,26. Nilai Indeks kekayaan spesies (SR), berkisar dari 2,83-4,45 dan Nilai indeks dominasi (d), berkisar dari 0,16-0,47. Analisis klasifikasi telah memisahkan 4 grup yang saling berhubungan pada stasiun maupun spesies penghuni yang memiliki kemiripan dalam tipe sedimen. Sedangkan Analisis Faktorial Koresponden untuk variabel stasiun yang paling bertanggungjawab terhadap pembentukan sumbu-sumbu adalah (kontribusi absolut). Stasiun-stasiun yang paling berkontribusi dalam pembentukan sumbu juga sebagai stasiun karakteristik sumbu tersebut, karena memiliki kontribusi relatif yang juga tinggi.

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KEANEKARAGAMAN JENIS IKAN DI SUNGAI DIGOEL DISTRIK EDERA KABUPATEN MAPPI

Musamus Fisheries and Marine Journal ◽

10.35724/mfmj.v1i1.1503 ◽

2018 ◽

pp. 1-14

Author(s):

Robert S. Buhdy ◽

Norce Mote ◽

Edy HP. Melmambessy

Keyword(s):

Species Diversity ◽

Relative Abundance ◽

Fish Species ◽

Diversity Index ◽

Survey Method ◽

Fishing Gear ◽

Species Diversity Index ◽

Dominance Index ◽

Abundance Index ◽

Evenness Index

Fisheries production in the mainland waters of Mappi Regency is larger (27.48%) compared to marine fisheries (8.53%). Edera District is one of the districts in Mappi District which contributes to the potential of fisheries specifically for mainland waters. This study aims to determine the diversity of fish species in the Digoel River, Edera District, Mappi Regency. The fishing gear used is gill nets, stocking nets, fixed lines, fishing rods and spoon nets (tanggo). The study was conducted in August - October 2017 using the survey method. The variables analyzed were the species diversity index, evenness index, dominance index and relative abundance index. The results of the study obtained 28 species of fish which were divided into 8 orders of 20 families and 28 species. The value of the diversity of fish species is moderate, the Evenness value is relatively stable and evenly distributed, the type of dominance in Di shows that there is no dominance of species and the relative abundance of Kr is medium. Keywords: Digoel River; Diversity; Evenness; Dominance and Relative Abundance.

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KEANEKARAGAMAN DAN KOMPOSISI IKAN PADA KONDISI PASANG DAN SURUT DI MUARA SUNGAI KELAY KABUPATEN BERAU KALIMANTAN TIMUR

Jurnal Pendidikan Matematika dan IPA ◽

10.26418/jpmipa.v10i2.25868 ◽

2019 ◽

Vol 10 (2) ◽

pp. 11

Author(s):

Yudistira Yudistira ◽

Jusmaldi Jusmaldi ◽

Medi Hendra

Keyword(s):

Species Diversity ◽

Fish Species ◽

Sampling Method ◽

Diversity Index ◽

High Tide ◽

Similarity Index ◽

Wiener Index ◽

Dominance Index ◽

East Kalimantan ◽

Evenness Index

Research on diversity and composition of fish at low tide and high tide condition in downstream Kelay River, District Berau, East Kalimantan is not yet know. The purpose of this research was to determine diversity and composition of fish that present at low tide and high tide condition in downstream Kelay River. In research using purposive sampling method and various sizes gill nets used. Results of this research shows that fish were collected at three locations sampling in downstream Kelay River consist of 14 species, 9 families, and 953 individuals. Based on the number of species, diversity Shannon-Wiener index and dominance index has stable of communities, with high value of diversity index (H'=1.975), high evenness index (E=0.749), and low value of dominance index (D= 0.173). The number of fish species found at low tide were 11 species and at high tide were 12 species. The similarity index of fish species at low tide and high tide condition were 64.3%.

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PEMANFAATAN TANAMAN REFUGIA MENGENDALIKAN HAMA PADI (Oryza nivara L) DI SOPORARU TAPANULI UTARA

AGRIFOR ◽

10.31293/agrifor.v20i2.5744 ◽

2021 ◽

Vol 20 (2) ◽

pp. 299

Author(s):

Ameilia Zuliyanti Siregar ◽

Sampe Lesnida

Keyword(s):

Plant Disease ◽

Sampling Method ◽

Diversity Index ◽

Red Rice ◽

Rice Pests ◽

Evenness Index ◽

Yellow Traps ◽

Richness Index ◽

North Sumatra ◽

Land Using

The refugia plant is one of the flowers that can be used as a shelter for natural enemies and as a feed sources for insects. The purpose of this study was to compare the use of refugia and without refugia plants in controlling environmentally friendly red rice pests in Soporaru Hamlet, Sigotom JuluVilalge, Pangaribuan District, North of Tapanuli Regency, North of Sumatra Province. This study uses a purposive sampling method with 3 types of traps, namely: yellow traps, fall traps and net traps. The samples was identified in the Plant Disease Laboratory, Faculty of Agriculture, University of North Sumatra in July 2020 until February 2021. The results showed that 8 orders of refugia were caught on land using refugia, 23 families, and 1,952 individuals, while on land without refugia there were 8 orders, 22 families and 1,807 individuals. On land using refugia (r) compared to land without refugia (k) it is known that the Species Richness Index (R) (Rr=2.9 and Rk=2.8), Diversity Index (H) (Hr=2.67 and Hk= 2.19), and Evenness Index (E) (Er=0.85 and Ek=0.71). Function status identified on land using refugia and without refugia as many as 5 species, namely herbivores, pollinators, predators, parasitoids and scavengers.

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Abundance and Diversity of Diatom Class Bacillariophyceae in the Waters of Tanjung Luar Fish Landing Based

JURNAL BIOLOGI TROPIS ◽

10.29303/jbt.v21i2.2699 ◽

2021 ◽

Vol 21 (2) ◽

pp. 448

Author(s):

Niswatul Audah ◽

Lalu Japa ◽

M. Yamin

Keyword(s):

Species Diversity ◽

Sampling Method ◽

Diversity Index ◽

Species Abundance ◽

Wide Distribution ◽

Species Diversity Index ◽

Dominance Index ◽

Systematic Random Sampling ◽

Species Dominance ◽

Abundance And Diversity

Diatom class Bacillariophyceae are world wide distribution and commonly dominated the phytoplankton community. The community of diatom class Bacillariophyceae of the waters Tanjung Luar Fish Landing Based (FLB) has never been reported. This study aims to determine the abundance and diversity of diatom class Bacillariophyceae. The sampling sites were determined by using a systematic random sampling method. Data of diatom class Bacillariophyceae were analyzed for species abundance, species diversity index and species dominance index calculations. The results showed, that the abundance of diatom class Bacillariophyceae species were 322.000 ind/L (low category), the species diversity index of diatom class Bacillariophyceae was 2.162 (moderate category), and the species dominance index was 0.138 (none of species dominance).

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TIPE KOMUNITAS HUTAN LAHAN KERING DI HUTAN LINDUNG SENTAJO, KABUPATEN KUANTAN SINGINGI, RIAU Community Types of Dryland Forest Within The Sentajo Protected Forest, Kuantan Singingi Regency, Riau Province

Journal of Tropical Silviculture ◽

10.29244/j-siltrop.8.2.103-109 ◽

2017 ◽

Vol 8 (2) ◽

pp. 103-109

Author(s):

Pebriandi . ◽

Omo Rusdiana ◽

Muhammad Buce Saleh

Keyword(s):

Species Diversity ◽

Diversity Index ◽

Similarity Index ◽

Systematic Sampling ◽

Importance Value Index ◽

Species Diversity Index ◽

Dominance Index ◽

Coverage Area ◽

Vegetation Diversity ◽

Evenness Index

Sentajo Protected Forest located in Kuantan Singingi Regency, Riau Province. There is no information about vegetation diversity in this location. Therefore this study was conducted. This study aimed to determine the diversity of vegetation, structure, and composition of each community in Sentajo Protected Forest. The study was conducted in April-September 2016. A sampling design was determined using systematic sampling with random start. The sampling intensity used was 5%. The parameters measured in this study were the importance value index, similarity index between communities, species diversity index, evenness index, dominance index, regeneration, as well as horizontal and vertical structures. Based on the type of soil, elevation, and slope, 6 communities were grouped from the dense coverage area (forested). The results showed that the Sentajo Protected Forest had 424 flora consisted of 254 species, and 102 families. Sentajo Protected Forest had similarity index between 18 - 64%, species diversity index of 2.62 - 4.15, evenness index of 0.59 - 0.86, dominance index of 0.02 - 0.08. The larger the diameter of the tree, the smaller the number of individuals. The stratification of the canopy had 5 layers of canopy. Sentajo Protected Forest regeneration was relatively good as the number of seedlings> saplings> mature trees.Key words: community, composition and structure, diversity, Sentajo Protected Forest.

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TIPE KOMUNITAS HUTAN LAHAN KERING DI HUTAN LINDUNG SENTAJO, KABUPATEN KUANTAN SINGINGI, RIAU

10.31227/osf.io/agxv8 ◽

2018 ◽

Author(s):

Pebriandi ◽

Omo Rusdiana ◽

Muhammad Buce Saleh

Keyword(s):

Species Diversity ◽

Diversity Index ◽

Similarity Index ◽

Systematic Sampling ◽

Importance Value Index ◽

Importance Value ◽

Species Diversity Index ◽

Dominance Index ◽

Coverage Area ◽

Evenness Index

Sentajo Protected Forest located in Kuantan Singingi Regency, Riau Province. There is no information aboutvegetation diversity in this location. Therefore this study was conducted. This study aimed to determine the diversity ofvegetation, structure, and composition of each community in Sentajo Protected Forest. The study was conducted in AprilSeptember2016. A sampling design was determined using systematic sampling with random start. The sampling intensityused was 5%. The parameters measured in this study were the importance value index, similarity index betweencommunities, species diversity index, evenness index, dominance index, regeneration, as well as horizontal and verticalstructures. Based on the type of soil, elevation, and slope, 6 communities were grouped from the dense coverage area(forested). The results showed that the Sentajo Protected Forest had 424 flora consisted of 254 species, and 102 families.Sentajo Protected Forest had similarity index between 18 - 64%, species diversity index of 2.62 - 4.15, evenness index of0.59 - 0.86, dominance index of 0.02 - 0.08. The larger the diameter of the tree, the smaller the number of individuals.The stratification of the canopy had 5 layers of canopy. Sentajo Protected Forest regeneration was relatively good as thenumber of seedlings> saplings> mature trees.

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Diversity of Molluscs (Gastropod And Bivalve) In Mangrove Ecosystem of Oransbari District, South Manokwari Regency, West Papua Province, Indonesia

Journal of Environmental Treatment Techniques ◽

10.47277/8(3)1224 ◽

2020 ◽

Vol 8 (3) ◽

pp. 1220-1224

Keyword(s):

Species Diversity ◽

Diversity Index ◽

Mangrove Ecosystem ◽

Species Evenness ◽

Species Diversity Index ◽

Dominance Index ◽

High Category ◽

West Papua ◽

Evenness Index

In the Oransbari mangrove ecosystem, 13 species of molluscs were identified with 1256 individuals consisting of 9 species of gastropod and 2 species of bivalve. Dominance index of the identified molluscswas 0.11, with species diversity index of 1.89 (medium category) and species evenness index of 0.76 (high category).

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Diversity and Abundance of Copepods in Taninthayi Coastal Waters, Myanmar

Journal of Marine Science ◽

10.30564/jms.v2i3.2437 ◽

2020 ◽

Vol 2 (3) ◽

Author(s):

Khin May Chit Maung ◽

Thaung Htut ◽

Ei Thal Phyu ◽

Zaw Myo Hein ◽

Nyo Nyo Tun

Keyword(s):

Species Richness ◽

Species Diversity ◽

Coastal Waters ◽

Correlation Matrix ◽

Diversity Index ◽

Species Number ◽

Species Diversity Index ◽

Evenness Index ◽

Richness Index ◽

Ecosystem Survey

Diversity and abundance of copepods occurring in Taninthayi coastal waters were studied and analyzed from the samples collected by R/V DR. FRIDTJOF NANSEN during the Myanmar ecosystem survey 2018. Seventy-nine copepods species belonging to calanoids (51 species), cyclopoids (21 species), and harpacticoids (7 species) were identified in the copepods community of Taninthayi coastal waters. Copepods species number and density were high at the nearshore stations (Sts 799, 842, 788) and low at the offshore stations (Sts 846, 802, 823). The resulted diversity index values of copepods were varied from 2.61 to 3.78 in species diversity index (H'), from 0.89 to 0.97 in the evenness index (E'), and from 2.51 to 7.50 in species richness index (D'). According to the correlation matrix, the abundance of copepods was positively correlated with temperature, chlorophyll a and fluorescence, and negatively correlated with salinity and oxygen.

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

Asian Journal of Fisheries and Aquatic Research ◽

10.9734/ajfar/2021/v15i530341 ◽

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.

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