scholarly journals Floristic structure and ecological role of Rourea afzelii stand in three savannah ecosystems from Cameroon

2021 ◽  
Vol 8 (1) ◽  
pp. 5-11
Author(s):  
Awé Djongmo Victor ◽  
Noiha Noumi Valery ◽  
Zapfack Louis
Keyword(s):  
Diversity Index ◽  
Basal Area ◽  
Carbon Price ◽  
Shannon Index ◽  
Ecological Role ◽  
Importance Value Index ◽  
Importance Value ◽  
Voluntary Market ◽  
Floristic Structure

The present study investigated the floristic structure and ecological role of Rourea afzelii stands insavannah, forest galleries and swampy areas to Cameroon. An 80 m x 50 m transect method wasundertaken to measure floristic diversity using Shannon index, Pielou equitability, Simpson’s indexand the importance value index. The structure of Rourea afzelii stands is determined by density,basal area and biovolume. The results of this study show that Rourea afzelii stands are morediversified in savannah with a Shannon diversity index (ISH =4 ± 0.03bit). The highest log stabilityof Rourea afzelii stands is observed in the savannah (EQ=0.75 ± 0.008). The Simpson index of theRourea afzelii stands is larger in the forest gallery (D=0.088 ± 0.0022). Rourea afzelii Stands aredenser in savannah (113 ± 2.54 individuals/ha). The basal area and biovolume of Rourea afzeliistands are very high in swamp area (St=15.75 ± 0.02 m2/ha, Biov=9.08 ± 0.12 m3/ha). The diametricstructure has an asymmetrical “L” shaped appearance, indicating a strong regeneration of Roureaafzelii Stands in the three sites studied. Rourea afzelii Stands in forest galleries sequestered morecarbon (26.41 ± 0.0015 ton C/ha) than those in savannahs and swampy areas. This valuecorresponds to sequestration of carbon dioxide of 96.92 ± 0.82 ton CO2/ha. Economically, thiscorresponds to the CDM carbon price (290.77± 3.332 Euros/ha), a Voluntary Market Carbon Priceof 455.54 ± 1.908 Euros/ha, a REDD + carbon price of 9692 ± 8.152 Euros/ha. In conclusion, theresults of this study can be used in the context of protection and conservation as well as thedomestication of such a species.

scholarly journals Floristic composition, diversity and structure of Khaya senegalensis stands in Benue Department, Cameroon

2021 ◽  
Vol 8 (1) ◽  
pp. 60-68
Author(s):  
Awé Djongmo Victor ◽  
Noiha Noumi Valery Valery ◽  
Madou Chantal Chantal ◽  
Zapfack Louis
Keyword(s):  
Species Richness ◽  
Diversity Index ◽  
Basal Area ◽  
Shannon Index ◽  
Simpson Index ◽  
Importance Value Index ◽  
Importance Value ◽  
Acacia Senegal ◽  
Significant Difference ◽  
Khaya Senegalensis

The present work has been done to provide basic data for a better conservation and valorization ofKhaya senegalensis stands in Sudano-Sahelian zone of Cameroon. A 100 m x 50 m transectmethod was undertaken to measure floristic diversity through the use of species richness,Shannon index, Pielou equitability, Simpson index, importance value index and importance valuefamily. The vegetation structure is determined by density, basal area and biovolume. Theinventory included trees with a dbh ?10 cm on an area of 1 ha per plot. A total of 6743individuals distributed in 24 families, 33 genera and 54 species were inventoried in all Khayasenegalensis stands studied. Statistical analysis showed significant differences, Shannon index,Simpson index, Pielou equitability, density, basal area, biovolume, species richness, heights class,diameters class, circumferences class but does not certify a significant difference of importancevalue index among in the villages. The undergrowth of Khaya senegalensis stands is more diverseat Bamé with a Shannon diversity index (ISH=5.87 ± 0.12 bit). The greatest of Pielou equitabilityis observed at Bamé (EQ=0.80 ± 0.01). The largest of Simpson index is recorded at Bamé(D=0.098 ± 0.001). Khaya senegalensis Stands are denser at Bamé (194 ± 3.12 individuals/ha).The basal area and biovolume of Khaya senegalensis stands are very high at Bamé (BA=25.87 ±0.06 m2/ha and Biovolume =15.32 ± 0.012 m3/ha). The species importance value is maximal in allthe studied villages (SIV=300 ± 71.45). The importance value index of species revealed a cleardominance in the undergrowth of Khaya senegalensis stands are Combretum adenogonium;Acacia senegal; Terminalia laxiflora; Guiera senegalensis; Acacia nilotica; Entada Africana.The vertical structure has three aspects, like the L (Dbh), asymmetric (height) and dissymmetrical(circumference) structures attesting to a strong regeneration of the understory ligneous woods ofKhaya senegalensis stands studied.

scholarly journals Composition & Ecological Role of Soil Macrofauna in Selorejo and Punten Citrus Farming, Malang - East Java

2021 ◽  
Vol 9 (1) ◽  
pp. 10-18
Author(s):  
Fitria Karinasari ◽  
Zulfaidah Penata Gama ◽  
Amin Setyo Leksono
Keyword(s):  
Diversity Index ◽  
Agricultural System ◽  
Abiotic Factor ◽  
Ecological Role ◽  
Importance Value Index ◽  
Importance Value ◽  
Soil Macrofauna ◽  
Wiener Diversity Index ◽  
Citrus Farming

Conventional Citrus crops farming is an Citrus farming system that uses Citrus cultivation techniques with maximum use of chemicals and organics material and there is to support a sustainable agricultural system. Indicators of environmental quality can be known from the composition and ecological role of fauna, one of which is soil macrofauna. This research aims to investigate the diversity and community structure of the soil macrofauna and to identification its role in the Citrus farming at Selorejo, Dau and Punten Villages, Bumiaji, Malang Regency.This study is a descriptive exploratory study in order to study on soil macrofauna capturing at each location for three times. The observation method of soil macrofauna used pitfall traps and handshorter methods. All data was tabulated used Microsoft Excel. Abiotic factor measurements for two locations have no different value in each sampling plot. The composition of soil macrofauna is obtained from the important value index (IVI) and the Shannon-Wiener diversity index (H'). Soil macrofauna was obtained from two locations as many as 28 families with the highest importance value index (IVI), namely Formicidae. The results showed that Selorejo Citrus farming consists of Predator 46%, Herbivorous 25%, Decomposer 11%, Scavenger 7%, and others 11%, while in Punten Citrus farming consists of 55% Predator, 10% Herbivorous,15% Decomposer,5% Scavenger, and others 15%.

scholarly journals Structure, composition and tree diversity in a temperate forest under management

2019 ◽  
pp. 29-35
Author(s):  
Antonio Mora-Santacruz ◽  
María Leonor Román-Miranda ◽  
Omar Nungaray-Villalobos ◽  
Gerardo Alberto González-Cueva
Keyword(s):  
Temperate Forest ◽  
Cloud Forest ◽  
Basal Area ◽  
Diversity Indices ◽  
Shannon Index ◽  
Importance Value Index ◽  
Importance Value ◽  
A Value ◽  
Normal Diameter ◽  
Area And Volume

In order to study both diversity indices and structure of forests, which are an essential tool for decision-making in forest management, which show natural successional processes and effects for its management. So the objetive of this study was to evaluate structure and diversity of arboral species in a temperate forest of southern Jalisco state. Five permanent forestry research sites 50 x 50 (2.500 m2) were established, and a census of all tree species was carried out, with normal diameter greater than 7.5 cm. Each individual was measured: height and normal diameter, placing an aluminum plate for identification. We obtained the importance value index (IVI), indices of diversity, richness, and dasometric parameters. There were 17 species, 9 genera and 9 botanical families; the Fagaceae was dominant. Pinus douglasiana presented the highest IVI (57.93%); The Shannon index had a value of 2.0; the index of Margalef was 2.4; the forest has a density of 688 trees ha-1, being the most abundant Styrax ramirezii; Pinus herrerae obtained the highest values in basal area and volume with 30.77 m2 ha-1 and 357,325 m3 ha-1 respectively. The values of diversity are influenced by elements of the cloud forest

CONTRIBUTION OF AGROFORESTS IN ADAPTATION OF CLIMATE CHANGE EFFECTS: ESTIMATING THE PHYTODIVERSITY AND C SEQUESTRATION POTENTIAL IN 8-, 16- AND 24-YEAR-OLD OF PINUS SYLVESTRIS AGROFORESTS IN NORTHERN CAMEROON (TROPICAL AFRICA)

2021 ◽  
pp. 2050010
Author(s):  
V. NOIHA NOUMI ◽  
P. KOUAM KAMNING ◽  
C. KAMDOUM DEMGUIA ◽  
L. ZAPFACK
Keyword(s):  
Aboveground Biomass ◽  
Basal Area ◽  
Allometric Equation ◽  
Shannon Index ◽  
Nondestructive Method ◽  
Total Carbon ◽  
Total Biomass ◽  
Importance Value Index ◽  
Importance Value ◽  
Sequestration Potential

The study aims at assessing the agrobiodiversity and carbon stocks by the pine agroforests in the Sudano-Guinean zone of Cameroon. Five [Formula: see text][Formula: see text]m sampling transects were established in each chronosequence, it was undertaken to assess the growth characteristics and biomass. Estimates of stocks of carbon in aboveground biomass, belowground biomass (BGB), total biomass (TB) and CO2 equivalent stock were incorporated in allometric equation based on nondestructive method. A total of 24 species from 23 genera and 17 families were inventoried. Annona senegalensis, Syzygium guineensis and Hymenocardia acida contributed the most to the importance value index (IVI). Density ranged between [Formula: see text]–[Formula: see text] stems/ha; basal area between [Formula: see text]–[Formula: see text][Formula: see text]m2/ha; Shannon index between [Formula: see text]–[Formula: see text] with the highest value for 8-year-old stands; Pielou’s evenness between [Formula: see text]–[Formula: see text] with the lowest value in 24-year-old stands. Aboveground biomass ranged between [Formula: see text]–[Formula: see text] Mg C/ha with the highest value in 16-year-old stands; belowground carbon from [Formula: see text] Mg C/ha to [Formula: see text] Mg C/ha and total carbon from [Formula: see text] Mg C/ha to [Formula: see text] Mg C/ha. The sequestration potential ranged from [Formula: see text] Mg CO[Formula: see text]/ha to [Formula: see text] Mg CO[Formula: see text]/ha. The sequestration rates were 84.77, 49.7 and 28.6 Mg CO[Formula: see text].ha[Formula: see text]yr[Formula: see text] in 8-, 16- and 24-year-old stands, respectively. Although our data reported that pine stands hosted a few number of species; they are true carbon sinks and useful to the REED[Formula: see text] community.

scholarly journals Composição florística e estrutural de um componente arbóreo em área de cerrado, Paranã-TO

2015 ◽  
Vol 10 (5) ◽  
pp. 108
Author(s):  
A. B. M. L. Rêgo ◽  
P. B. Souza ◽  
R. R. Silva ◽  
P. L. Rêgo
Keyword(s):  
Diversity Index ◽  
Basal Area ◽  
Floristic Composition ◽  
Sensu Stricto ◽  
Importance Value Index ◽  
Importance Value ◽  
Closed Area ◽  
Absolute Density ◽  
Density Values ◽  
Individual Trees

<p>O Cerrado Brasileiro apresenta uma enorme diversidade de fitofisionomias divididas em formações florestais, savânicas e campestres. Com o objetivo de estudar a composição florística e estrutural de um fragmento de cerrado <em>sensu stricto</em>, a fim de fornecer subsídios para conservação e manejo adequado de áreas similares. Foram instaladas sistematicamente quatro parcelas de 25x100m, sendo que as mesmas foram distanciadas 25 m entre si, perfazendo um total de 1,0 hectare de área amostral. No interior das parcelas, foram amostrados todos os indivíduos arbustivo-arbóreos, com circunferência a 1,30m do solo (CAP) maior ou igual a 15 cm. Para obtenção dos parâmetros fitossociológicos densidade relativa (DR), densidade absoluta (DA), dominância absoluta (DoA), dominância relativa (DoR), frequência absoluta (FA), frequência relativa (FR), índice de valor de importância (IVI), índice de valor de cobertura (IVC), índice de diversidade de Shannon (H’) e Pielou (J). Foram amostrados 245 indivíduos, distribuídos em 29 espécies, 29 gêneros pertencentes a 20 famílias, o que corresponde a uma área basal total de 1,94 m².ha<sup>-1</sup> e densidade absoluta estimada de 327 ind.ha<sup>-1</sup>. As espécies que apresentaram maiores valores de (IVI) foram <em>Qualea parviflora</em> (38,45%), <em>Curatella americana</em> (34,53%), <em>Byrsonima verbascifolia</em> (32,20%), <em>Psidium incanescens</em> (31,89%), <em>Pterodon emarginatus </em>(18,62%) e <em>Anachardium humile</em> (18,34%). <em>Qualea parviflora</em> foi a espécie mais representativa dentro do componente arbóreo o que se conclui aos altos valores de densidade e dominância nos estratos.</p><p align="center"><strong><em>Floristic composition and structural components of a tree in closed area in the municipality of Parana-Tocantins </em></strong></p><p><strong>Abstract</strong><strong>: </strong>The Brazilian Cerrado presents a huge diversity of vegetation types divided into forests, savannas and country. In order to study the floristic and structural composition of a cerrado fragment in order to provide subsidies for conservation and proper management of similar areas. Systematically they were installed four installments of 25x100 m, being that they were spaced 25 m apart, totaling 1.0 hectare sample area. Inside the plots were sampled every shrub and individual trees with circumference at 1.30 m soil (CAP) greater than or equal to 15 cm. To obtain the Phytosociological relative density parameters (DR), absolute density (DA), absolute dominance (DoA), relative dominance (DoR), absolute frequency (AF), relative frequency (RF), importance value index (IVI) Coverage value index (CVI), Shannon diversity index (H ') and Pielou (J). We sampled 245 individuals belonging to 29 species, 29 genera belonging to 20 families, which corresponds to a basal area of 1.94 m².ha<sup>-1</sup> and estimated absolute density of 327 ind.ha<sup>-1</sup>. The species showing higher values of (IVI) were <em>Qualea parviflora</em> (38.45%), <em>American Curatella</em> (34.53%), <em>Byrsonima verbascifolia</em> (32.20%), <em>Psidium incanescens</em> (31.89%), <em>Pterodon emarginatus</em> (18.62%) and <em>Anachardium humile</em> (18.34%). <em>Qualea parviflora</em> was the most representative species within the arboreal component which is concluded to high density values and dominance in the strata.</p>

scholarly journals VEGETASI POHON DAN PERSEBARANNYA DI TAMAN WISATA ALAM GUNUNG TUNAK DAN HUTAN KERAMAT, MANDALIKA, LOMBOK TENGAH, PROVINSI NUSA TENGGARA BARAT

2020 ◽  
Vol 19 (2) ◽  
Author(s):  
Muhammad Mansur
Keyword(s):  
Tree Species ◽  
Co2 Sequestration ◽  
Carbon Stock ◽  
Diversity Index ◽  
Similarity Index ◽  
Basal Area ◽  
Importance Value Index ◽  
Importance Value ◽  
Trunk Diameter ◽  
Plot Area

The study was conducted on March 2018 in two locations study, i.e. Mount Tunak Nature Tourism Park (NTP) (6400 m2 plot area) and Keramat Forest (4800 m2 plot area), Central Lombok District, West Nusa Tenggara Province. The objective of the study was to find out the diversity of tree species and its distribution which can be used for forest area management by the local government and can support the establishment of a Special Economic Region in Mandalika as a place for conservation, research, education and scientific tourism. In the total plot of 1.12 hectare, we recorded 1560 individuals, representing 56 species,  47 genera  and 19 families. All stems ≥ 5 cm in diameter were measured and identified. In the plot of Mt. Tunak NTP, we recorded 992 individuals, representing 41 species, basal area was 11.4 m2, 31.7 m3of estimated bole volume, 78.3 tons biomass, 39.2 tons carbon stock and 143.7 tons CO2 sequestration. Five dominant tree species (trunk diameter ≥ 5 cm) recorded with the highest Importance Value Index (IVI) were Aglaia argentea (IVI= 34.3%), Schoutenia ovata (IVI= 33.3%), Drypetes neglecta (IVI= 25.4%), Glycosmis pentaphylla (IVI= 16.4%) and Grewia koordersiana (IVI= 14.9%). The level of diversity of tree species in the Mt. Tunak NTP was classified into a midle level with a Diversity Index (H')= 3.3, while in the Keramat Forest we recorded 568 individuals, representing 37 species, basal area was 19.9 m2, 51.1 m3 of estimated bole volume, 149.8 tons biomass, 74.9 tons carbon stock and 274.9 tons CO2 sequestration. Five dominant tree species were recorded; Dalbergia latifolia (IVI= 69.4%), Grewia koordersiana (IVI= 34.5%), Schoutenia ovata (IVI= 34.3%), Cupaniopsis macropetala (IVI= 18.2%) and Rhus succedanea (IVI= 14.2%). The level of diversity recorded (H')= 2.9 and classified as midle level. The composition of vegetation in Mt.Tunak NTP and Keramat Forest is different (Jaccard Similarity Index was 39.3%).    

Floristic Variation of Tree Communities and Their Association with Soil Properties in Pulau Jerejak, Penang, Peninsular Malaysia

2020 ◽  
Vol 14 (1) ◽  
pp. 34
Author(s):  
Faezah Pardi
Keyword(s):  
Tree Species ◽  
Diversity Index ◽  
Basal Area ◽  
Peninsular Malaysia ◽  
Importance Value ◽  
Conservation Action ◽  
Endangered Tree ◽  
Endangered Tree Species ◽  
Tree Communities ◽  
Floristic Variation

This study was conducted at Pulau Jerejak, Penang to determine the floristic variation of its tree communities. A 0.5-hectare study plot was established and divided into 11 subplots. A total of 587 trees with diameter at breast height (DBH) of 5 cm and above were measured, identified and recorded. The tree communities comprised of 84 species, 63 genera and 32 families. The Myrtaceae was the most speciose family with 10 recorded species while Syzgium glaucum (Myrtaceae) was the most frequent species. The Myrtaceae recorded the highest density of 306 individuals while Syzgium glaucum (Myrtaceae) had the highest species density of 182 individuals. Total tree basal area (BA) was 21.47 m2/ha and family with the highest BA was Myrtaceae with 5.81 m2/ha while at species level, Syzgium glaucum (Myrtaceae) was the species with the highest total BA in the plot with value of 4.95 m2/ha. The Shannon˗Weiner Diversity Index of tree communities showed a value of 3.60 (H'max = 4.43) and Evenness Index of 0.81 which indicates high uniformity of tree species. The Margalef Richness Index (R') revealed that the tree species richness was 13.02. Myrtaceae had the highest Importance Value of 20.4%. The Canonical Correspondence Analysis (CCA) showed that Diospyros buxifolia (Ebenaceae) and Pouteria malaccensis (Sapotaceae) were strongly correlated to low pH. Dysoxylum cauliflorum (Meliaceae) and Eriobotrya bengalensis (Rosaceae) were correlated to phosphorus (P) and calcium ion (Ca2+), respectively. Therefore, the trees species composition at Pulau Jerejak showed that the biodiversity is high and conservation action should be implemented to protect endangered tree species. Keywords: Floristic variation; Tree communities; Trees composition; Pulau Jerejak; Species diversity

scholarly journals TREE SPECIES DIVERSITY IN A PRISTINE MONTANE FOREST PREVIOUSLY UNTOUCHED BY HUMAN ACTIVITIES IN FOJA MOUNTAINS, PAPUA, INDONESIA

REINWARDTIA ◽  
2018 ◽  
Vol 17 (2) ◽  
Author(s):  
Asep Sadili ◽  
Kuswata Kartawinata ◽  
Herwasono Soedjito ◽  
Edy Nasriadi Sambas
Keyword(s):  
Species Diversity ◽  
Tree Species ◽  
Human Activities ◽  
Diversity Index ◽  
Basal Area ◽  
Montane Forest ◽  
Tree Species Diversity ◽  
Importance Value ◽  
Montane Forests ◽  
Species Area

ADILI, A., KARTAWINATA, K., SOEDJITO, H. & SAMBAS, E. N. 2018. Tree species diversity in a pristine montane forest previously untouched by human activities in Foja Mountains, Papua, Indonesia. Reinwardtia 17(2): 133‒154. ‒‒ A study on structure and composition of the pristine montane forest previously untouched by human activities was conducted at the Foja Mountains in November 2008. We established a one-hectare plot divided into 100 subplots of 10 m × 10 m each. We enumerated all trees with DBH ≥ 10 cm which diameters were measured, heights were estimated and habitats were noted. We recorded 59 species, 42 genera and 27 families, comprising 693 trees with the total basal area (BA) of 41.35 m2/ha. The forest had lower species richness compared to those of lowland forests in Kalimantan, and Sumatra and montane forests in West Java. The Shannon-Wiener’s diversity index was 3.22. Nothofagus rubra (Importance Value, IV=47.89%) and Parinari corymbosa (IV=40.3%) were the dominant species, constituting the basis for designating the forest as the Nothofagus rubra - Parinari corymbosa association. To date, the dominance of N. rubra is unique to the Foja Mountains, as elsewhere in Papua the montane forests were dominated by N. pullei or other species. The species-area curve indicated a minimal area of 5000 m2. On the family level Fagaceae (IV=53.23%), Chrysobalanaceae (IV=40.53%) and Myristicaceae (IV=26.43%) were dominant. Verti-cally the forest consisted of four strata (A–D). In each stratum Nothofagus rubra, Platea latifolia, Parinari corymbosa and Myristica hollrungii were dominant. The diameter class distribution of Nothofagus rubra, Parinari corymbosa and Platea latifolia led us to assume that these species were regenerating well.

scholarly journals Tree diversity, stand structure and community composition in tropical forest of Rajaji tiger reserve, Northern India

2018 ◽  
Vol 10 (3) ◽  
pp. 945-953 ◽  
Author(s):  
Akash . ◽  
Navneet . ◽  
B.S. Bhandari
Keyword(s):  
Tropical Forest ◽  
Community Composition ◽  
Stand Structure ◽  
Diversity Index ◽  
Stand Density ◽  
Tree Diversity ◽  
Importance Value Index ◽  
Importance Value ◽  
Northern India ◽  
Tiger Reserve

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.

scholarly journals ANALISIS VEGETASI DAN KEANEKARAGAMAN TUMBUHAN DI KAWASAN MANIFESTASI GEOTERMAL IE SUUM KECAMATAN MESJID RAYA KABUPATEN ACEH BESAR

2018 ◽  
Vol 5 (2) ◽  
pp. 114
Author(s):  
Muslich Hidayat
Keyword(s):  
Hot Spring ◽  
Diversity Index ◽  
Geothermal Area ◽  
Importance Value Index ◽  
Importance Value ◽  
High Category ◽  
A Value ◽  
Higher Temperature ◽  
Chemical Conditions ◽  
Manifestation Area

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.

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