scholarly journals The composition and diversity of plant species in pasak bumi’s (Eurycoma longifolia) habitat in Batang Lubu Sutam forest, North Sumatra, Indonesia

2019 ◽  
Vol 20 (2) ◽  
pp. 413-418 ◽  
Author(s):  
ARIDA SUSILOWATI ◽  
HENTI HENDALASTUTI RACHMAT ◽  
DENI ELFIATI ◽  
M. HABIBI HASIBUAN

Susilowati A, Rachmat HH, Elfiati D, Hasibuan MH. 2019. The composition and diversity of plant species in pasak bumi’s (Eurycoma longifolia) habitat in Batang Lubu Sutam forest, North Sumatra, Indonesia. Biodiversitas 20: 413-418. Pasak bumi (Eurycoma longifolia Jack) is one of the most popular medicinal plants in Indonesia. Currently, E. longifolia is being over-exploited due to its potential and popularity as herbal medicine and its high value in the market. Therefore, the study on the population structure of the species and habitat characterization is required to ensure successfulness of conservation of this species. The study was carried out in lowland forest, located in Limited Production Forest within the Register Number 40, situated administratively in Papaso Village, Sub-District of Batang Lubu Sutam-Padang Lawas, North Sumatra, Indonesia. Batang Lubu Sutam forest is known as a source of pasak bumi material in North Sumatra. Every year tons of pasak bumi are collected from this forest and exported to Malaysia and surrounding countries. Due to illegal harvesting for its roots, pasak bumi has been seriously depleted in some areas in Batang Lubu Sutam forest. Therefore, current data on its population are needed for conservation effort of Batang Lubu Sutam's pasak bumi. The objectives of this study were to assess the structure of forest where pasak bumi grows and to determine the correct management for sustainability the future stocks. Vegetation analysis was carried out purposively in four transect belts, each consisting of five quadrats or plots. The results showed that the Importance Value Index of pasak bumi at seedling, sapling, pole and tree stages was 21.26%, 9.147%, 0, and 0 respectively. The Shannon Diversity Index (H) ranged between 3.050 and 3.220 and was inside its common value distribution. The evenness index was high, more than 0.85, at all stages of plant growth. The disappearance of pasak bumi at pole and tree stages indicates threatening condition for the sustainability of pasak bumi in the study sites because of excessive harvesting.

2019 ◽  
Vol 20 (4) ◽  
pp. 1215-1221
Author(s):  
ERNIK YULIANA ◽  
YUNI TRI HEWINDATI ◽  
ADI WINATA ◽  
WIBOWO A DJATMIKO ◽  
ATI RAHADIATI

Abstract. Yuliana E, Hewindati YT, Winata A, Djatmiko WA, Rahadiati A. 2019. Diversity and characteristics of mangrove vegetation in Pulau Rimau Protection Forest, Banyuasin District, South Sumatra, Indonesia. Biodiversitas 20: 1215-1221. The purpose of the study was to analyze the flora diversity and characteristics of mangrove vegetation in Pulau Rimau Protection Forest, Banyuasin District, South Sumatra. Data collected were the number and girth diameter of mangrove tree species, and aquatic ecology parameters using transect method. The sample plots size were 2m×2 m; 5m×5 m; 10m×10 m; for seedling, sapling, and tree, respectively. The observation plots were arranged in a row of 120 m length on two sides of the forest edge, namely Calik Riverbank and Banyuasin Riverbank. Data were analyzed using importance value index (IVI), Simpson’s diversity index and Sørensen’s community similarity. The study revealed that there were differences in mangrove characteristics in two study sites. There were 57 plant species identified inside and outside sample plots, but only 15 species (26.32%) among them were categorized as true mangrove species. Inside the sample plots, there were 11 and 10 mangrove tree species recorded on the Calik Riverbank and Banyuasin Riverbank, respectively, but only 7 species among them were found in both sites. The mangroves on Calik Riverbank were dominated by Nypa (IVI 53.59%) and Bruguiera (51.12%), while those on Banyuasin Riverbank were dominated by Sonneratia (66.91%) and Avicennia (51.73%). The Simpson’s diversity index for Calik Riverbank and Banyuasin Riverbank was 0.82 and 0.78, respectively, whereas the Sørensen’s coefficient of community between the two sites was 0.67.


2019 ◽  
Vol 20 (6) ◽  
Author(s):  
RUDIANTO AMIRTA ◽  
MUHAMMAD TAUFIQ HAQIQI ◽  
SAPARWADI SAPARWADI ◽  
ELIS SEPTIA ◽  
DEWI MUJIASIH ◽  
...  

Abstract. Amirta R, Haqiqi MT, Saparwadi, Septia E, Mujiasih D, Setiawan KA, Sekedang MA, Yuliansyah, Wijaya A, Setiyono B, Suwinarti W. 2019. Searching for potential wood biomass for green energy feedstock: A study in tropical swamp-peat forest of Kutai Kertanegara, Indonesia. Biodiversitas 20: 1516-1523. Recently, much attention has been focused on finding suitable plant species, from different forest ecosystems, having the potential to be used as sources of renewable energy. Most of such information was reported from the lowland forest area and only limited information is available regarding swamp-peat forest species, including their energy potency. Therefore, in this paper, plant diversity and energy potency of swamp-peat forest wood biomass were studied to reveal their potential as green energy feedstock. Physico-chemical characterization of wood biomass was performed using the American Society for Testing and Material (ASTM) protocols. Twenty-seven species of plants, consisting of 23 trees and 4 shrubs, belonging to 19 families were identified, amongst which Shorea balangeran had the highest importance value index (87.72%). The results showed that T. obovata exhibit the highest suitability to be used as energy feedstock indicated by the highest energy production of 4.60 MWh per ton of dry biomass, followed by L. indica (4.56 MWh/ton), D. excelsa (5.52 MWh/ton), F. rukam (4.20 MWh/ton), P. galeata (3.66 MWh/ton), S. caudatilimbum (3.61 MWh/ton), A. elmeri (3.59 MWh/ton), G. nervosa (3.49 MWh/ton) and G. bancana (3.42 MWh/ton). The high density of wood species correlated with the high value of energy potency. In contrast, the fast-growing tree and shrub species, such as K. hospita (1.76 MWh/ton), C. odorata (1.36 MWh/ton) and O. sumatrana (1.17 MWh/ton), showed lower energy potency. The most dominant plant species, S. balangeran gave only 2.96 MWh energy per ton of dry biomass and it was classified in the middle group of plant species suitable as green energy feedstock, along with other species, such as C. brachiata, C. rotundatus, P. javanicum, V. umbonata, L. speciosa, V. pinnata, and A. longifolius. Due to suitable energy properties, growth rate and also adaptability of this woody biomass, they can be exploited to support sustainable supply of biomass feedstock for the green electricity program in the study area.


2019 ◽  
Vol 7 (1) ◽  
pp. 309
Author(s):  
Rusdiyanto Husuna ◽  
Adnan S. Wantasen ◽  
Ari B. Rondonuwu

This study aims to know the community structure of mangrove and the environmental condition in South Tabulo coast. Mean temperature at station 1, 2, and 3 was 310C, and water salinity varied between 28-30 ‰. Water pH was averagely 7 in all stations. Substrate measurements were visually done and through touches. Stations 1 and 2 had sandy muddy substrates, while station 3 was muddy. Mangroves of tree criterion were found 122 individuals of 7 species, Avicennia lanata, A. marina, Rhizophora apiculata, R. mucronata, Sonneratia alba, Bruguiera gymnorrhiza, and Ceriops tagal. Field observations showed that the highest species density was recorded in R. mucronata. The highest species frequency was found in S. alba, R. apiculata, and R. mucronata, while the highest species cover and importance value index were recorded in S. alba and R. apiculata dan R. mucronata. Based on diversity index, it was found that only 7 species were found in the study sites and it belonged to good condition. It indicates that the study sites are still in good ecological condition.Abstrak Keywords : Mangrove, community, Boalemo, diversity, importance value. ABSTRAK Penelitian ini bertujuan untuk mengetahui struktur komunitas mangrove serta kondisi lingkungan di Pantai Tabulo Selatan. Berdasarkan hasil penelitian di Pantai Tabulo Selatan untuk pengukuran suhu pada stasiun 1, 2, dan 3 diperoleh hasil rata-rata 310C, dengan salinitas bervariasi antara 28-30 ‰. Pengukuran pH air pada semua stasiun pengamatan diperoleh hasil rata-rata 7. Pengamatan substrat dilakukan secara visual dengan cara meraba tekstur substrat pada setiap stasiun, dan substrat yang terdapat di lokasi penelitian pada stasiun 1 dan 2 adalah lumpur berpasir, pada stasiun 3 berlumpur. Hasil penelitian menunjukan bahwa pada semua stasiun dengan kriteria pohon telah ditemukan 122 individu dari 7 spesies yang ditemukan yaitu Avicennia lanata, Avicennia marina, Rhizophora apiculata, R. mucronata, Sonneratia alba, Bruguiera gymnorrhiza dan Ceriops tagal. Berdasarkan pengamatana lapangan, kerapatan spesies tertinggi dimiliki oleh spesies Rhizophora mucronata, frekuensi spesies tertinggi dimiliki spesies S. alba, R. apiculata dan Rhizophora mucronata, penutupan spesies dan indeks nilai penting didapati spesies Sonneratia alba, Rhizophora apiculata dan R. mucronata.. Berdasarkan indeks keanekaragaman dapat dilihat bahwa hanya ada 7 spesies yang didapatkan pada lokasi penelitian dan termasuk dalam kriteria keanekaragaman baik. Hal ini menunjukkan bahwa di lokasi penelitian masih dalam kondisi ekologis yang cukup baik.Kata kunci : Mangrove, komunitas, Boalemo, keanekaragaman, nilai penting.


2022 ◽  
Vol 14 (2) ◽  
pp. 887
Author(s):  
Ishfaq Ahmad Wani ◽  
Susheel Verma ◽  
Renu Gupta ◽  
Masood Majaz Ganaie ◽  
Gaurav Nigam ◽  
...  

The alpine grasslands of Kashmir Himalaya act as a treasure house of floristic biodiversity. They have remained largely unstudied because of their remoteness and inaccessibility. It is imperative to have quantitative studies of these areas to allow the long-term monitoring of flora in these fragile ecosystems. During the present study, nutrient analysis and species diversity of some alpine grasslands were investigated. Electroconductivity (EC) of the soils ranged between 0.12 and 0.33 (dSm−1). With an increase in altitude and precipitation and a decrease in temperature, soil pH and available macro-nutrients (OC, N, P, K) show a considerable decrease. Sixty-six plant species belonging to twenty-nine families and fifty-one genera were reported with members predominantly from the Asteraceae, Rosaceae and Plantaginaceae families. Seven species were common to all study areas and Renyi diversity profiles showed that Kongwattan was the most diverse followed by Poshpathri and Yousmarg. The results of the Sorensen β diversity index showed a relatively lower dissimilarity index among the three studied alpine sites. In the majority of the growth forms, growth initiation was recorded in April, whereas senescence occurred in September. The highest bloom was seen in June-July. The plant species exhibited a greater variability in their phenophases under different environmental conditions and altitudinal gradients. Plants were more vigorous at lower altitudes and showed rapid response to the prevailing conditions. Stoloniferous forbs and tussock forming graminoids such as Sibbaldia cuneata, Trifolium repens, Plantago major, Trifolium pratense, Poa compressa, Poa angustifolia, and Plantago lanceolata showed a greater importance value index (IVI). The sedentary system of livestock rearing at Yousmarg resulted in the decreased density of the palatable species. This study allowed us to conclude that direct knowledge of soil nutrient composition and species diversity in alpine ecosystems can enhance conservation and ensure better management practices over a period of time.


2020 ◽  
Vol 8 (3) ◽  
pp. 298
Author(s):  
Dina Naemah ◽  
Normela Rachmawati ◽  
Eny Dwi Pujawati

Differences in plant species are determined by genetic and environmental factors. Environmental factors are influenced by humans, so if environmental factors change, it can cause the diversity of growing species to change. Some of the characteristics of peat swamp forest are that it is always wet, has a layer of peat and has a more distinctive plant species because the soil is acidic. This research was conducted in peat swamp forest in Banjar district. This study aims to analyze the structure, composition and diversity index of undergrowth species in peat swamp forests.This research uses the compartmental path method, then analyzed by calculating the INP (Importance Value Index) based on the values of density, frequency and dominance. The study also calculates its diversity index. The results showed 24 species of undergrowth from 14 families. The highest Importance Value index was Papisangan (Ludwigia octovalis) from the Ongraceae family of 41.537%. The distribution value of the species is Banta (Megathyrsus sp) with the density value per hectare is 15.432%, the frequency value of Megathyrsus sp is 14.061% and the largest species dominance value is L. octovalis which is 14.513%. The diversity index for undergrowth was 2.79, meaning that the vegetation in the peat swamp forest had moderate diversity


2019 ◽  
Vol 42 (1) ◽  
pp. 83-90
Author(s):  
Hari Shankar Lal ◽  
◽  
Sharmistha Ganguly ◽  
Kartik Pramanik ◽  
P.V. Prasanna ◽  
...  

The Sal (Shorea robusta) dominated forest vegetation of Dalma Wildlife Sanctuary, West Singhbhum, Jharkhand, India was explored to evaluate the diversity and vegetation structure through different phyto-sociological attributes. The knowledge of the structure and composition of the plant communities has enormous significance in conservation of managed forests, therefore, the plant species diversity, structure and importance value index (IVI) at various levels, viz., trees, shrubs and herbs were studied. A total of 153 plant species (66 trees, 30 shrubs and 57 herbs) belonging to 124 genera of 51 families were recorded from the 30 random plots marked for sampling within the sanctuary. The IVI was highest in Shorea robusta (40.87) and lowest in Syzygium salicifolium (1.08). Shannon-Weaver’s diversity index was recorded highest in herbaceous species (3.66) than in trees (3.08) and shrubs (2.66). Simpson’s index was highest in trees (0.106) than in shrubs (0.035) and herbs (0.028). Pielou’s index was found highest in herbs (0.064) than in shrubs (0.048) and trees (0.046) which was within the range reported for different Indian forests and also which indicates that the sanctuary exhibits species diverse forest. The result of plant species diversity and their quantitative features reveal that the overall community is heterogeneous.


2018 ◽  
Vol 10 (3) ◽  
pp. 945-953 ◽  
Author(s):  
Akash . ◽  
Navneet . ◽  
B.S. Bhandari

In present study, we present data on tree diversity, stand structures and community composition in six sites of tropical forest in Rajaji tiger reserve, Northern India. The enumeration of 72 plots results a total of 19,050 individuals, 47 species, 42 genera, 25 families in which Holoptelia integrifolea, Dalbergia sissoo, Shorea robusta, Cassia fistula and Trewia nudiflora were the species which showed higher importance value index (IVI) in the study area. The stand density of the six sites ranges from 149.99 - 397.91 hac-1 where as the total basal area of trees ranges from 3.612 - 46.813 m2/hac-1. The Shannon diversity index ranged from 1.35 to 2.51, Simpson index ranged from 0.097 - 0.446, Margalef index ranged 2.584 - 4.9, The Evenness index ranged from  0.551 - 0.852 in the study area. Further the studied area has showed ample evidences from indices in supporting the higher floristic diversity and stand structure after providing the present area as a status of tiger reserve.


2018 ◽  
Vol 5 (2) ◽  
pp. 114
Author(s):  
Muslich Hidayat

Ie Suum geothermal manifestation area is a hot sering resource in Ie Suum Village at Aceh Besar regency. Ie Suum hot spring is a stretch of Seulawah Agam mountain and is one of the most active volcanic mountains in Aceh. This area has higher temperature and soil pH compared to areas far from geothermal areas. Therefore, this study can be associated with the unique characteristics of vegetation of geothermal areas will be different from vegetation plants that exist in other vegetation types. This research was conducted by quadrat transect method by determining the location of the research by purposive sampling divided into four point (station) with size determined based on plant habitus that is: herb (1x1 m2), bush / shrub (2x2 m2), pole ( 5x5 m2), and trees (10x10 m2). Data analysis is done qualitatively and quantitatively. Quantitative analysis of data by using vegetation analysis are: density (Kr), Frequency (Fr), Dominance (Dr), and Diversity Index (Ĥ). The results of the study found 23 families consisting of 34 species with a total number of individuals as many as 534 scattered in 4 observation stations divided into herbaceous plants, shrubs, poles and trees. Important Value Index (INP) vegetation in geothermal manifestation area of Ie Suum in all stations was obtained by INP 225,86%. This value belongs to the high category. The species species that have the highest index of other species Axonopus compressus is 17.02%, while the lowest Importance Value Index is Clidemia hirta with a value of 1.32%. The high value of INP Axonopus compressus is due to this species living on dry soil moisture and high acidity. The biodiversity index (Ĥ) of geothermal area of Ies Suum of Mesjid Raya District of Aceh Besar is Ĥ = 3,508. Vegetation of plants in the geothermal area ie suum belong to the high category due to plants that can adapt to high environmental physical-chemical conditions.


2021 ◽  
Vol 6 (3) ◽  
pp. 65241
Author(s):  
ASM Helal Siddiqui ◽  
Md. Masudur Rahman ◽  
Md. Najmus Sayadat Pitol ◽  
Md. Akramul Islam ◽  
Sk Md. Mehedi Hasan

The status of natural seedlings near localities in the Sundarbans Mangrove Forest was assessed through a stratified random sampling method  to observe seedling composition and diversity, importance value index, family importance value, and species evenness. A total of 63 sample plots of 3,990 m2 area were surveyed in three natural and anthropogenic influenced salinity zones of Sundarbans. A total of 16,166 seedlings of 15 species under 12 families were found. Family Euphorbiaceae showed the highest (59.59%) family relative density and Rhizophoraceae presented the highest (20%) family relative diversity Index (FRDI). The maximum family importance value (FIV) showed by Euphorbiaceae (66.26) and the maximum importance value index (IVI) of species has been observed in Excoecaria agallocha (114.74). Excoecaria agallocha showed the highest relative density (59.6%) and relative abundance (39.87%) where the highest relative frequency (15.27%) was observed by Heritiera fomes. The mean stem density and species diversity index in the whole survey area was 2701 stem ha-1 and 0.0009 correspondingly. The Shannon-Wienner's diversity index was 1.52 where the maximum Shannon-Wienner's diversity index was 2.708. The Simpson's diversity index and Dominance of Simpson index were 0.38 and 0.62 with Simpson's reciprocal index 2.632. The Species evenness index, Menhinick’s, and Margalef's indices were 0.561, 0.118, and 1.445 respectively. The Species diversity index of the three salinity zones were 0.0017, 0.0029, and 0.0035 respectively. The Shannon-Wienner's diversity index of Low Salinity Zone (LSZ), Moderate Salinity Zone (MSZ), and Strong Salinity Zone (SSZ) were 0.887, 1.369, and 1.845 correspondingly where LSZ (0.632) showed the highest Simpson's diversity index follow ed by MSZ (0.394) and SSZ (0.21). The Species evenness index for LSZ, MSZ, and SSZ were 0.346, 0.505, and 0.742 where Menhinick’s Index were 0.148, 0.210, and 0.207 respectively. The analysis showed poor diversity indices and the area was dominated by few species with few families. The status is also reduced with increasing salinity.


2018 ◽  
Vol 10 (1) ◽  
pp. 522-527
Author(s):  
Jyoti Sharma ◽  
Anil K. Raina

Quantitative analysis, distributional pattern and species diversity of woody plant species of Lamberi Range of Rajouri Forest division, J&K, has been carried out by laying 50 quadrats (10m X 10m size) for trees and 100 quadrats (5m X 5m size) for shrubs. Various phytosociological parameters like frequency, density, abundance, importance value index IVI and diversity indices for trees and shrubs has been used to reveal the plant community structure of the area. The abundance to frequency ratio (A/F) for different species was determined to assess the distribution pattern of the species (regular <0.025, random 0.025-0.05 and contagious >0.05) which indicated the contagious distribution for all the species. Survey of the area revealed presence of 63 woody plant species from the study area comprising of 43 trees and 20 shrubs. Pinus roxburghii (IVI 49.7, Abundance 81.1) and Carissa opaca (IVI 81.12 abundance 7.05) have been recorded as the dominant tree and shrub, respectively, of the area. The computation of diversity indices showed that species richness and evenness i.e Shannon- Weiner’s, Margalef’s and Menhinick’s remained high for trees and low for shrubs. Simpson’s index of dominance was also high for trees. Species which needs priorities for conservation and protection and also required to be monitored have also been highlighted.


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