scholarly journals STRUKTUR KOMUNITAS MAKROALGA SEBAGAI INDIKATOR EKOLOGI EKOSISTEM PERAIRAN PADA KAWASAN KONSERVASI LAUT DAERAH DI GILI SULAT LOMBOK TIMUR

2020 ◽  
Vol 20 (1) ◽  
pp. 132
Author(s):  
Susanty Ariani ◽  
Agil Al Idrus ◽  
Lalu Japa ◽  
Didik Santoso
Keyword(s):  
Species Diversity ◽  
Diversity Index ◽  
Economic Value ◽  
Wiener Index ◽  
Marine Conservation ◽  
Ecological Indicator ◽  
Conservation Areas ◽  
Species Diversity Index ◽  
Conservation Area ◽  
Calculation Results

Abstrak: Makroalga adalah salah satu sumber daya alam yang memiliki nilai ekonomis tinggi. Keragaman makroalga kawasan daerah tropis sangat tinggi, tidak terkecuali di daerah intertidal Gili Sulat. Keberadaan komuditas ini di Gili Sulat belum banyak diketahui. Penelitian ini bertujuan mendiskripsikan keragaman spesies makroalga sebagai indikator ekologi ekosistem perairan di kawasan konservasi laut daerah Gili Sulat Lombok Timur. Pengumpulan data penelitian makroalga dengan metode kuadrat (1 x 1 m) yang disebar pada tiga stasiun pengamatan. Analisis data untuk indeks keanekaragaman spesies menggunakan indeks Shannon-Wiener, indeks keseragaman spesies menggunakan indeks Evennes, indeks dominansi menggunakan indeks Simpson dan analisis hubungan makroalga dengan faktor lingkungan menggunakan uji Korelasi Product Moment. Hasil penelitian menemukan 11 spesies makroalga, dan 7 spesies dari kelas Chlorophyceae dan 4 spesies dari kelas Phaeophyceae. Selain itu, spesies yang memiliki nilai kepadatan tertinggi adalah Halimeda opuntia sebesar 18.519 rumpun/ha. Sementara itu, hasil analisis indkes keanekaragaman spesies dari semua spesies yang temukan berada dalam kategori sedang dengan nilai pada stasiun I adalah 1,00, stasiun II adalah  1,36; dan stasiun III adalah 1,59. Selanjutnya, nilai keseragaman spesies berdasarkan hasil perhitungan diperoleh pada stasiun I adalah 0,53, stasiun II adalah 0,65 dan Stasiun III adalah 0,85. Oleh karena itu, spesies makroalga pada stasiun III memiliki tingkat keseregaman yang paling tinggi dibandingkan dua stasiun lain (I dan II) di lokasi studi. Kesimpulan dari penelitian adalah makroalga dapat  menjadi indikator ekologi untuk menilai perubahan ekosistem pada kawasan konservasi laut daerah di Gili Sulat Lombok Timur Nusa Tenggara Barat.Kata kunci: Makroalga, Keanekaragaman dan Gili Sulat.Abstract: Macroalgae is one of the natural resources that has high economic value. The diversity of macroalgae in the tropics is very high, not least in the intertidal area of Gili Sulat. The existence of this community in Gili Sulat is not well known. This study aims to describe the diversity of macroalgae species as an indicator of the ecology of aquatic ecosystems in regional marine conservation areas in Gili Sulat, East Lombok. Research data collection for macroalgae using the quadratic method (1 x 1 m) spread across three observation stations. Data analysis for the species diversity index uses the Shannon-Wiener index, the species uniformity index uses the Evennes index, the dominance index uses the Simpson index and the analysis of the relationship of macroalgae with environmental factors using the Product Moment Correlation test. The results found 11 species of macroalgae, and 7 species of the class Chlorophyceae and 4 species of the class Phaeophyceae. In addition, the species that has the highest density value is Halimeda opuntia of 18,519 clumps / ha. Meanwhile, the results of the analysis of the species diversity index of all species found were in the medium category with the value at station I being 1.00, station II being 1.36; and station III is 1.59. Furthermore, the species uniformity value based on the calculation results obtained at station I is o, 53, station II is 0.65 and Station III is 0.85. Therefore, the macroalgae species at station III have the highest level of uniformity compared to the other two stations (I and II) at the study location. The conclusion from the study is that macroalgae can be an ecological indicator to assess ecosystem changes in the marine conservation area in Gili Sulat, East Lombok, West Nusa Tenggara.Keywords: Macroalgae, Diversity and Gili Sulat

scholarly journals KEANEKARAGAMAN JENIS ANGGREK ALAM (Orchidaceae) BERDASARKAN KETINGGIAN TEMPAT DI GUNUNG POTENG CAGAR ALAM RAYA PASI KOTA SINGKAWANG PROVINSI KALIMANTAN BARAT

2020 ◽  
Vol 8 (3) ◽  
Author(s):  
Novita Putri Sesar ◽  
Iskandar A M ◽  
Togar Fernando Manurung
Keyword(s):  
Species Diversity ◽  
Environmental Factors ◽  
Nature Reserve ◽  
Diversity Index ◽  
Economic Value ◽  
Survey Method ◽  
Species Diversity Index ◽  
Orchid Species ◽  
West Kalimantan ◽  
Medium Range

Natural orchids are one of the flora in Mount Poteng which is included of Raya Pasi Nature Reserve located at Singkawang City, West Kalimantan Province. Orchids have economic value for source of income and be beneficial to ecology that needs to be protected. The altitudes and environmental factors strongly affected the presence of orchid species.The research aims to record the diversity of natural orchids species based on the altitudes place in Mount Poteng. The research was conducted on February 28 until March 28, 2020. This research uses survey method. The research sample was taken using double plots method and to determine sample plots locations is conducted by purposive. The total number of the sample plots is 16 plots and each plot measure 20 by 50 meters. Based on the result of research found 19 species of natural orchids that consist of 348 individuals. The results analysis of the diversity index of orchid species in whole of altitudes at Mount Poteng is 1,338 that is included medium range. The highest species diversity index of 1,300 occurred at altitude of 400-500 m asl and the lowest species diversity index at altitude of 700-725 m asl that is 0,594. Orchid species which found in whole of altitudes is Dendrobium crumenatum. Furthermor, there were found the orchid species on certain heights are Cleisostoma scortechinii, Cordiglottis filiformis, Ludisia discolor, and Phalaenopsis pantherina at altitude of 400-500 m asl and species of Bromheadia finlaysoniana and Pomatocalpa latifolia found at altitude of 700-725 m asl.Keywords: altitudes, mount poteng, orchids, species diversity

scholarly journals Fluktuasi Fitoplankton pada Kawasan Konservasi Rajungan Perairan Betahwalang Demak

2019 ◽  
Vol 22 (2) ◽  
pp. 191
Author(s):  
Elsa Lusia Agus ◽  
Rudhi Pribadi ◽  
Subagiyo Subagiyo
Keyword(s):  
Water Quality ◽  
Species Diversity ◽  
Diversity Index ◽  
Phytoplankton Abundance ◽  
Species Diversity Index ◽  
Dominance Index ◽  
Conservation Area ◽  
Factors Affecting ◽  
Protection Zone ◽  
Water Conditions

Phytoplankton is an organism that had an effect on life waters and can be used as the parameters in monitoring water quality. Distribution of phytoplankton in the waters can be for biomonitoring which can be used to make protection zone. This study will examine the distribution and composition of phytoplankton in The crab conservation area in Betahwalang Waters, Demak. This research divided into three stations in estuaries and the sea s. Each sampling was done once a month. Samples were taken using a plankton net. The results found three classes of phytoplankton, namely Bacillariophyceae class, Cyanophyceae class and Dinophyceae class. The number of genera found in the river area (37 genera), at the estuary station as much (38 genera) and the sea station as much (31 genera). Fluctuation in phytoplankton abundance at each station is quite varied. The abundance of phytoplankton in January was 1.030.400 cells/L, in February it was 936.800  cells/L, and in March it was 643.600 cells/L. The highest abundance occurs in the estuary area, then the river and the lowest in the sea. The value of species diversity index (H ') is in the range of 2.57-3.03. Uniformity index values range from 0.86 to 0.94. The dominance index from 0.06 to 0.14. Factors affecting the abundance and dominance of phytoplankton are water conditions and the rainy season. Fitoplankton merupakan organisme yang mempunyai pengaruh besar terhadap kehidupan di suatu perairan baik langsung maupun tidak langsung dan dijadikan sebagai salah satu parameter dalam pemantauan kualitas perairan.Fitoplankton di perairan dapat dijadikan suatu ukuran bahwa Kawasan tersebut dapat dijadikan sebagai zona perlindungan biota.Penelitian ini mengkaji fluktuasi fitolankton pada Kawasan konservasi rajungan di Perairan Betahwalang, Demak. Penelitian ini dilakukan pada 3 stasiun yang terletak disungai, muara sungai, dan laut. Pengambilan sampel dilakukan setiap bulan selama tiga bulan  menggunakan planktonnet. Hasil penelitian ditemukan 3 kelas yaitu kelas Bacillariophyceae, Cyanophyceae dan Dinophyceae.Jumlah genus yang ditemukan pada area sungai, muara sungai dan laut berturut-turut 37 genus, 38 genus dan 31 genus. Fluktuasi kelimpahan fitoplankton di setiap stasiun cukup bervariasi.Kelimpahan fitoplankton pada bulan Januari sebesar 1.030.400 sel/L, pada bulan Februari sebesar 936.800 sel/L, dan pada bulan Maret sebesar 643.600 sel/L. Kelimpahan tertinggi terjadi pada daerah muara, kemudian sungai dan terendah di laut. Sedangkan nilai indeks keanekaragaman jenis (H’) berada pada kisaran 2,57-3,03. Nilai indeks keseragaman berkisar 0,86-0,94. Sedangkan indeks dominasi berkisar 0,06-0,14. Faktor yang mempengaruhi kelimpahan dan dominasi fitoplankton adalah kondisi perairan dan musim hujan.

scholarly journals Carbon stocks of homestead forests have a mitigation potential to climate change in Bangladesh

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Tarit Kumar Baul ◽  
Tajkera Akhter Peuly ◽  
Rajasree Nandi ◽  
Lars Holger Schmidt ◽  
Shyamal Karmakar
Keyword(s):  
Species Diversity ◽  
Stand Structure ◽  
Diversity Index ◽  
Carbon Stocks ◽  
Small Scale ◽  
Species Diversity Index ◽  
C Stocks ◽  
Homestead Forests ◽  
C Stock ◽  
Low Altitude

AbstractA total of 176 homestead forests at three altitudes in the Chittagong Hill Tracts, Bangladesh were randomly surveyed to estimate carbon (C) stocks and how stand structure affects the biomass C. All woody vegetations were measured, and litter and soil (0–30 cm depth) were sampled. The tree biomass C stock in the top two altitude forests was up to 37–48% higher than in low altitude, owing to significantly higher tree density and species diversity. An increase in species diversity index by one unit increased the biomass stock by 23 Mg C ha−1. The C stock of litterfall in low altitude forests was 22–28% higher than in the top two altitude due to the deposition of litters downslope and deliberate use of mulch for soil improvement and conservation, resulting in up to 5% higher total soil C. The topsoil C was 10–25% higher than the deeper soil, depending on the altitude. The forest stored 89 Mg C ha−1, indicating a potential for C sequestration in trees outside forest. This study would help policymakers to strengthen the recognition of small-scale forests for mitigation in REDD + (reducing emissions from deforestation and forest degradation, the role of conservation, sustainable management of forests, and enhancement of forest carbon stocks) and support owners through C credits from sustainably managed forests.

scholarly journals Keanekaragaman Pari Hasil Tangkapan Nelayan di TPI Karangantu Banten

2021 ◽  
Vol 9 (3) ◽  
pp. 257-266
Author(s):  
Erreull Isyhadu Putri ◽  
◽  
Dinda Rizqi ◽  
Fenia Alya ◽  
Tia Azizah
Keyword(s):  
Species Diversity ◽  
Literature Review ◽  
Diversity Index ◽  
Conservation Status ◽  
Habitat Characteristics ◽  
Species Diversity Index ◽  
Interview Method

This study aims to determine the diversity of rays caught by fishermen in TPI Karangantu Banten. This research uses interview method and literature review. The discussion of the observations includes classification, habitat, characteristics, and conservation status. The results of this study indicate that there is a diversity of rays, namely the results of the families obtained from the observations are Rhinopteridae, Dasyatidae, and Gymnuridae). From the results of the calculation of the species diversity index using the Shannon Wiener formula, it is included in the medium category. This diversity can be used as knowledge and inventory for biodiversity, especially the chondrichthyes class in TPI Karangantu, Serang, Banten.

scholarly journals Phytoplankton Community Investigation and Water Quality Assessment of M River in winter in Shijiazhuang City

2021 ◽  
Vol 267 ◽  
pp. 01035
Author(s):  
Ziqi Zhang ◽  
Lei Yang ◽  
Dongxu Han ◽  
Hongyan Shen
Keyword(s):  
Water Quality ◽  
Species Diversity ◽  
Water Body ◽  
Phytoplankton Community ◽  
Diversity Index ◽  
Water Quality Assessment ◽  
Species Diversity Index ◽  
Wiener Diversity Index ◽  
Eutrophic Water ◽  
Evenness Index

An investigation of phytoplankton community and water quality for M River was conducted in December 2019.The results showed that 38 species of phytoplankton belonging to 6 phyla and 26 genera were collected. Among them, Bacillariophyta is the richest species, which accounted for 34.21%, followed by Cyanophyta with 26.32% and Chlorophyta with 28.95%. The density of phytoplankton was 63.0*106 inds/L which indicated as eutrophic water body. The highest density was Bacillariophyta, accounting for 51.03%. The Shannon-Wiener diversity index (H’) varied from 1.34 to 2.24, the Margalef Species diversity index (d) varied from 2.71 to 3.85, and the Pielou evenness index (J) varied from 0.38 to 0.67. According to the integrative analysis results of H’, d and J, M River water quality belongs to oligo-polluted, but individual sites belong to meso-polluted.

Species structure in Zambian miombo woodland

1987 ◽  
Vol 3 (2) ◽  
pp. 109-118 ◽  
Author(s):  
E. N. Chidumayo
Keyword(s):  
Species Diversity ◽  
Biological Diversity ◽  
Diversity Index ◽  
Species Density ◽  
Species Structure ◽  
Miombo Woodland ◽  
Species Diversity Index ◽  
Old Growth ◽  
Number Of Species ◽  
The Mean

ABSTRACTMiombo woodland in Zambia is divided into wetter and drier types by the 1100 mm mean rainfall isohyet. In the present study two wetter (Northern, Northwestern) and three drier (Central, Eastern, Western) miombo subtypes were recognized.A survey of the woody flora of 94 old-growth and 58 coppice stands in the five miombo subtypes revealed some significant differences in species diversity among them. The floristic differentiantion of miombo subtypes was best achieved by the use of the Shannon species diversity index (H′) and species density (number of species 0.1 ha−1 or 0.4 ha−1). H′ in miombo decreased from 2.247 in Northwestern to 2.136 in Northern, 2.052 in Eastern, 1.918 in Central and 1.824 in Western subtypes. Although species density was not significantly different between wetter miombo subtypes, this decreased in a similar fashion from 18.78 0.1 ha−1 in Northwestern to 18.30 in Northern, 16.65 in Eastern, 14.79 in Central and 12.29 in Western subtypes. The low species diversity in Western drier miombo was attributed to the combined effects of low soil fertility and rainfall.Although the mean number of species per 0.1 ha plot was higher in coppice samples, species richness (d) and index of diversity (H′) were lower than in old-growth samples. These results indicate lower species diversity in regenerating miombo. The dynamic aspects of species structure should therefore be considered in the future conservation of biological diversity in miombo woodland.

Fortran Program for Calculating Brillouin's Species Diversity Index

1980 ◽  
Vol 42 (3) ◽  
pp. 185-187 ◽  
Author(s):  
Jay R. Stauffer ◽  
Rodney L. Reish ◽  
W. Ford Calhoun
Keyword(s):  
Species Diversity ◽  
Diversity Index ◽  
Fortran Program ◽  
Species Diversity Index

scholarly journals THE DIVERSITY OF PHYTOPHAGE AND ENTOMOPHAGE INSECT SPECIES IN SUGARCANE PLANTATIONS PLANTED WITH FLOWERING PLANTS

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Saida Fitriani Azim ◽  
Chandra Irsan ◽  
Yulia Pujiastuti
Keyword(s):  
Species Diversity ◽  
Sugar Cane ◽  
Diversity Index ◽  
Flowering Plants ◽  
Insect Species ◽  
Species Diversity Index ◽  
Direct Capture ◽  
Index Value

This study aimed to know the influence of planting the flowering plants in sugarcane plantation on the index value of diversity, domination, and the eveness of phytophage and entomophage insect species in sugarcane plantation. This study was done on two-month and six-month sugarcane of PT.  Perkebunan Nusantara VII Cinta Manis District. The research location is located in Ketiau Village, Lubuk Keliat District, Ogan Ilir Regency, South Sumatra. The study was conducted from July to December 2018. Insects that came to flowering plants were collected by using fitfall traps, nets, and direct capture of insects that came. The results showed that the age of sugarcane affected the diversity of Entomophage and Phytophage insect species that came to the flowering plants. At 2-moth-old sugar cane plantations were found 42 species (388 individuals) and 6-month-old sugarcane plantations were found 41 species (284 individuals). The diversity of Phytophage and Entomophage species that came to flowering plants in  the 2-month-old sugarcane plantations was almost the same as in the 6-month-old sugarcane plantations. Phytopage species diversity index values were 2,826 and 2,548, while Entomophage were 2,564 and 2,867.

scholarly journals Diversity of Lepidoptera: Rhopalocera at Selorejo Waterfall Area, Ponorogo District, East Java, Indonesia

2021 ◽  
Vol 3 (2) ◽  
pp. 68-72
Author(s):  
Siti Zulaikha ◽  
Muhamad Azmi Dwi Susanto
Keyword(s):  
Species Diversity ◽  
Natural Environment ◽  
Host Plants ◽  
Nature Reserve ◽  
Diversity Index ◽  
Abiotic Factors ◽  
Species Diversity Index ◽  
Good Environment

Selorejo Waterfall is a natural tourist area that is directly adjacent to the Sigogor Mountain Nature Reserve and has a beautiful and natural environment. This makes the Selorejo Waterfall area has a good environment for the sustainability of various species of butterflies. This research aimed to find out the diversity and abundance of butterflies in the Selorejo Waterfall area. This research was conducted using the Visual Day Flaying method by following the trail in the Selorejo Waterfall area. This study found 26 species belongs 4 families with 109 individuals in total. The value of the species diversity index at the location of H'= 2.81 moderate category. The diversity of butterflies in the Selorejo Waterfall area was influenced by the availability of host plants and feed as well as abiotic factors.

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