KOMPOSISI DAN STRUKTUR HUTAN RIPARIAN  SEBAGAI PENAHAN GELOMBANG DI DESA SEMAYANG KABUPATEN KUTAI KARTANEGARA

AbstractThis study aimed to determine the composition and structure of Semayang forest and the Importance Value Index (IVI) of riparian forest in its role of reducing the wave rate. The method used is multilevel plot method of 20x20 m for sampling of tree level, 5x5 m for sapling level and 2x2 m for seedling level. The result showed that the highest Importance Value Index at tree level was dominated by 3 species, they were L. javanicum (101,663), M. speciosa (76,201) and G. renghas (65,962). At sapling level dominated by P. indica (102,990). At seedling level dominated by M. pigra (95,004)andP. brevistipitata (70,109). In addition, Semayang riparian forest has an ecological function as a wave retaining. It can be seen based on the vegetation density and horizontal structure of species that make up the forest. Vegetation density is predicted to reduce the rate of Semayang lake waves that occur during flood season. Keywords: Composition and Structure, Riparian Forest, Semayang Lake.

Download Full-text

KEANEKARAGAMAN JENIS VEGETASI MANGROVE DI DESA DUSUN BESAR KECAMATAN PULAU MAYA KABUPATEN KAYONG UTARA

JURNAL HUTAN LESTARI ◽

10.26418/jhl.v8i2.40074 ◽

2020 ◽

Vol 8 (2) ◽

Author(s):

Cici Khairunnisa ◽

Eddy Thamrin ◽

Hari Prayogo

Keyword(s):

Species Diversity ◽

Mangrove Forest ◽

Avicennia Marina ◽

Forest Vegetation ◽

Forest Area ◽

Tree Level ◽

Importance Value Index ◽

Importance Value ◽

Mangrove Vegetation ◽

Vegetation Species

The diversity of mangrove vegetation is a community that has different characteristics from other communities. Diversity is an important component in mangrove management, but so far the availability of data related to mangroves is still very minimal, including those related to the species diversity of mangrove forest vegetation in the region. This study aims to obtain data on species diversity of vegetation found in the mangrove forest area of Dusun Besar Village, Pulau Maya District, Kayong Utara Regency. Method used was a combination of path and plot method, and the determination of the location and research path location were carried out using purposive sampling. The results of observation and data analysis showed that the dominant vegetation species with the highest importance value index (INP) for seedlings, saplings and trees was the Avicennia marina, namely the INP value of seedlings 37.04%, the INP values of sapling 65.24%, and the value of INP a tree rate of 65. Based on the results of the most dominant analysis found the species of Avicennia marina with a value of C = 0.03430 for seedling, C = 0.04729 for sapling, and C = 0.04736 for tree level. The diversity of mangrove forest vegetation species in Dusun Besar Village for seedlings, saplings and trees is low because it has an H 'value <1, and the abundance of mangrove vegetation species was not evenly distributed in each forest area because it only has an e value <1.Keywords: Dusun Besar Village, Mangrove Forest, Species Diversity

Download Full-text

Fuel beds variation of coastal tropical freshwater forested wetlands in three disturbance regimes at La Encrucijada, Biosphere Reserve, Mexico

10.21203/rs.3.rs-42037/v1 ◽

2020 ◽

Author(s):

Romeo de Jesús Barrios Calderón ◽

Dulce Infante Mata ◽

José Germán Flores Garnica ◽

Jony Ramiro Torres Velázquez ◽

Zulia Mayari Sánchez-Mejía ◽

...

Keyword(s):

Forest Fires ◽

Biosphere Reserve ◽

Basal Area ◽

Forested Wetlands ◽

Material Surface ◽

Importance Value Index ◽

Importance Value ◽

High Accumulation ◽

Horizontal Structure ◽

Tropical Freshwater

Abstract Background: Tropical freshwater forested wetlands in coastal regions are rapidly disappearing, one of the causes is forest fires. This is caused by high accumulation of fuel beds that can vary in origin and type. Therefore, the objective of this study was to characterize the fuel beds in tropical freshwater forested wetlands with three different level of disturbance at El Castaño, La Encrucijada Biosphere Reserve.Methods: Seventeen sampling units were used to described the strates of forest fuel beds (canopy, sub-canopy and understory) in both the vertical and horizontal stratum. Quantity and quality of dead (fallen woody material, surface litterfall and fermented litterfall) fuels were characterized using the planars intersections technique.Results: A total of eight tree species, two shrubs, five lianas and two herbaceous species were found in tropical freshwater forested wetlands. The vertical structure concentrates the highest proportion of trees between 2 and 12 m high, including the first two defined height classes. The horizontal structure denotes a higher percentage of trees with a normal diameter between 2.5 to 7.5 cm (61.4%) of the total. The sites none disturbance presented the highest arboreal density (2,686 ind. ha− 1), however the highest basal area was found in the sites with medium disturbance (39.41 m2 ha− 1). The richness and diversity of species shows that the Fisher, Margalef, Shannon and Simpson α indices were higher in the sites undisturbed, while the Berger-Parker index shows greater dominance in the sites high disturbance. Pachira aquatica Aubl. was the species with the highest importance value index, and contributes the most to the fuel beds. The average accumulation of dead fuel beds was higher in sites with high disturbance (222.18 ± 33.62 t ha− 1), with the largest accumulations of woody fuels occurring in the 1 h, 10 h and 1000 h classes, the latter in a state of fermentation.Conclusions: It’s important to consider the probability of occurrence of surface fires is high. In these tropical freshwater forested wetlands, independent of disturbance, underground fires have the same probability and the intensity will depend on the depth of the organic matter layer. This study contributes define fire-prone areas in these ecosystems. The results are of great importance to design fire prevention strategies.

Download Full-text

SPACE PATTERN OF FOREST SPECIES AND ITS RELATIONSHIP WITH AGRICULTURAL FACTORS AGROFLORESTAL SYSTEM

FLORESTA ◽

10.5380/rf.v49i2.58207 ◽

2019 ◽

Vol 49 (2) ◽

pp. 335 ◽

Cited By ~ 1

Author(s):

Emanuel José Gomes de Araújo ◽

Dayane Oliveira Lima ◽

Rafaella De Angeli Curto ◽

Eduardo Vinícius Silva ◽

José Carlos Arthur Júnior

Keyword(s):

Spatial Pattern ◽

Spatial Relationship ◽

Gliricidia Sepium ◽

Agroforestry System ◽

Edaphic Factors ◽

Soil Factors ◽

Importance Value Index ◽

Importance Value ◽

Horizontal Structure ◽

Space Pattern

The objective of this work was to describe the spatial distribution pattern of the arboreal and regenerating forest stratum and its relationship with edaphic factors in a multistratified agroforestry system without management. The data were obtained by means of a census of the arboreal and regenerating plants, in which the variables diameter were measured at 1.30m of the soil and total height, besides the botanical identification. The plants of the arboreal stratum were grouped in diameter and height classes and the regenerating plants in height classes. In both strata, the horizontal structure indicators were estimated and the species of higher Importance Value Index (IVI) were selected to perform the spatial analysis. The K Ripley function was applied in the univariate case to test the hypothesis of complete randomness in the groups and in the arboreal and regenerating species of higher IVI. In the bivariate case, the Ripley K function was applied to test the hypothesis of complete spatial independence between groups or aggregate pattern species, with edaphic attributes. The results indicated random spatial pattern for most of the tested groups, with only the species Gliricidia sepium and Archontophoenix alexandrae with aggregate spatial pattern, up to 30m distance, in the arboreal and regenerating strata, respectively. However, no spatial relationship was observed between the pattern of distribution of the species and the soil factors of agroforestry system (SAF). In general, it is concluded that edaphic factors were fundamental in the development of plants, but not for the formation of aggregates

Download Full-text

Does the severity of a forest fire modify the composition, diversity and structure of temperate forests in Jalisco?

REVISTA CHAPINGO SERIE CIENCIAS FORESTALES Y DEL AMBIENTE ◽

10.5154/r.rchscfa.2020.12.076 ◽

2021 ◽

Vol 28 (1) ◽

pp. 3-20

Author(s):

Daniel A. Cadena-Zamudio ◽

◽

José G. Flores-Garnica ◽

Mónica E. Lomelí-Zavala ◽

Ana G. Flores-Rodríguez ◽

...

Keyword(s):

Forest Fire ◽

Forest Fires ◽

Temperate Forest ◽

Temperate Forests ◽

Diameter Class ◽

Importance Value Index ◽

Importance Value ◽

Horizontal Structure ◽

Moderate Severity ◽

Composition Structure

Introduction: Forest fires are natural disturbances that influence structure, dynamics, performance, composition and diversity of species. Objective: To compare composition, structure and diversity of temperate forest vegetation affected by different levels of severity of a forest fire in Jalisco. Materials and methods: Composition, horizontal structure, importance value index (IVI), diameter class, diversity indexes of Shannon, Simpson, Margalef richness and Bray-Curtis similarity were evaluated in three regions (Bosque La Primavera and Sierra de Tapalpa and Sierra de Quila) of temperate forest with three levels of severity (no fire, moderate and extreme). Results: Twelve species from six families were recorded. Pinaceae and Fagaceae were the most dominant. Dominance ranged from 0.2 to 50 m2∙ha-1 in moderate and extreme severity sites. Pinus devoniana recorded the highest IVI (71 %) in Sierra de Tapalpa. The highest number of trees was recorded in diameter class ≤30 cm. Diversity and richness indices showed significant differences (P < 0.05) for Sierra de Tapalpa and Sierra de Quila and among fire levels; the highest indices were recorded in sites of moderate severity. Tree composition similarity between regions was low (<33 %). Conclusions: Moderate severity of forest fire favored composition, structure and diversity of vegetation in temperate forests of Jalisco, indicating that the level of severity influences resilience of forest ecosystem communities.

Download Full-text

STRUKTUR VEGETASI SEKITAR JENIS POHON TANDUI (Mangifera rufocustata KOSTREM.) DI HULU SUNGAI SELATAN

Jurnal Hutan Tropis ◽

10.20527/jht.v9i2.11298 ◽

2021 ◽

Vol 9 (2) ◽

pp. 464

Author(s):

Adistina Fitriani ◽

Eva Prihatiningtyas

Keyword(s):

Hevea Brasiliensis ◽

Cocos Nucifera ◽

In Situ Conservation ◽

Analysis Data ◽

Ex Situ ◽

Tree Level ◽

Importance Value Index ◽

Importance Value ◽

Nephelium Lappaceum

This research aims to analyze the vegetation that grow around the tandui plants/ This research done to support for the ex situ and in situ conservation of natural resources,The data collected in this research used proposive sampling methodd with 15 observation plots starting from seedlings, saplings, poles and trees. The analysis data was used the Importance Value Index (INP). The results showed that the seedling rate was dominated by Jambu Air (Syzygium aqueum) 114.65%, Karet (Hevea brasiliensis) 63.38%, Ramania (Bouea macrophylla) 47.92%, sapling rate was dominated by Karet (Hevea brasiliensis) 60.5%, Jambu Biji (Syzygium aqueum) 48.19%, Jingah (Gluta renghas) 41.77%, the pole level was dominated by Karet (Hevea brasiliensis) 175.60%, Rambutan (Nephelium lappaceum) 148.62% , Sungkai (Peronema canescens) 126.64% and the tree level is dominated by Rubber (Hevea brasiliensis) 191.82%, Kelapa (Cocos nucifera) 108.78% and Langsat (Lansium domesticum) 84.60%

Download Full-text

KAJIAN EKOLOGI, KEANEKARAGAMAN JENIS DAN POTENSI POHON DI PEKARANGAN (STUDI KASUS DI DESA KEBAK, JUMANTONO, KARANGANYAR)

Caraka Tani Journal of Sustainable Agriculture ◽

10.20961/carakatani.v30i1.11846 ◽

2015 ◽

Vol 30 (1) ◽

pp. 33

Author(s):

Arief Susanto ◽

Endang Setya Muliawati ◽

Djoko Purnomo

Keyword(s):

Species Diversity ◽

Agricultural Land ◽

Diversity Index ◽

Survey Methods ◽

Vegetation Density ◽

Importance Value Index ◽

Importance Value ◽

Trunk Diameter ◽

Biological Variables ◽

Canopy Area

Homegarden is one alternative that multipurpose agricultural land to cope with reduced land resources. This study aimed to determine the characteristics of the ecology, species diversity and potential of trees in the homegarden that is useful in further development. The research had been conducted in June to August 2011 in the Kebak Village, Jumantono District, Karanganyar Regency with a altitude of 330 meters above sea level and soil type alvisol. This experiment used survey methods with observation unit is divided into three categories based on the size of the homegarden: narrow (<700 m2), medium (700-900 m2) and large (> 900 m2). Observed variables include three aspects: biological variables (type and number of trees, tree height, trunk diameter and canopy area), physical variables (analysis of soil, microclimate homegarden, macroclimate and physiographic land) and analysis of the vegetation (density, frequency, dominance, relative density, relative frequency, relative dominance, importance value index and the index of species diversity). Kebak village had been 40 species of trees are divided into fruit trees, timber, vegetable producers, growers and others. The results showed indicate that the type of fruit tree had the largest of 20 species by the reached 142 tree to rambutan tree. Spacious homegarden area had the highest type and number of trees as well as the highest species diversity index.

Download Full-text

Plant diversity in logged over forest in Mahakam Ulu, East Kalimantan, Indonesia

Biodiversitas Journal of Biological Diversity ◽

10.13057/biodiv/d221115 ◽

2021 ◽

Vol 22 (11) ◽

Author(s):

Adhy widya Setiawan ◽

ALBERTUS TJIU ◽

ARI MEIDIDIT ◽

ISWINANTO ISWINANTO ◽

AMMAR GINANJAR ◽

...

Keyword(s):

Plant Diversity ◽

Diversity Index ◽

Similarity Index ◽

Iucn Red List ◽

Tree Level ◽

Line Transect ◽

Importance Value Index ◽

Importance Value ◽

East Kalimantan ◽

Wiener Diversity Index

Abstract. Setiawan AW, Tjiu A, Meididit A, Iswinanto, Ginanjar A, Atut Y, Agusti R. 2021. Plant diversity in logged over forest in Mahakam Ulu, East Kalimantan, Indonesia. Biodiversitas 22: 4829-4838. A study of flora was conducted in the Ratah Timber concession area. Objectives of this study was to calculate the Importance Value Index (IVI) and identify species diversity in Mahakam Ulu, East Kalimantan. A survey was carried out in 128 plots within 13 transects placed purposively. Vegetation sampling was conducted using line transect and a quadrat method. As many as 530 species belonging to 79 families were found. Of these species, 420 species were found in observation plots with 374 of the species being tree. The most dominant tree species were Endertia spectabilis, Shorea pinanga and Shorea leprosula with IVI of 10.24%, 8.25%, and 6.96%, respectively. In total, 114 species or 21.5% are endemic species of Borneo. The Shannon-Wiener diversity index at tree level was 5.51 and at seedling level was 4.95. The highest Similarity Index was found between transects 23 and 21, meanwhile the lowest was between transects 05 and 15. This study found 61 species which are classified on the International Union for Conservation of Nature (IUCN) Red List (2020-1) as critically endangered (16), endangered (11), and vulnerable (34) species.

Download Full-text

Analisis Struktur dan Komposisi Vegetasi Tumbuhan Di Taman Hutan Raya Raden Soerjo Prigen Pasuruan

ULIN Jurnal Hutan Tropis ◽

10.32522/ujht.v5i2.5336 ◽

2021 ◽

Vol 5 (2) ◽

pp. 114

Author(s):

Nia Sylviana Sari ◽

Samsun Hadi ◽

Rr. Eko Susetyarini

Keyword(s):

Diversity Index ◽

Environmental Parameters ◽

Sampling Technique ◽

Wealth Index ◽

Tree Level ◽

Importance Value Index ◽

Importance Value ◽

Dominance Index ◽

Vegetation Diversity ◽

Forest Park

Long drought and uncontrolled human activities resulted in R. Soerjo Prigen Pasuruan Grand Forest Park experiencing fire. Adverse impacts on vegetation can result in vegetation death. Damage caused by fire to vegetation can lead to succession which can be seen from the composition and structure of forest vegetation. The purpose of this study was to determine the effect of environmental parameters, structure and composition of plant vegetation in Tahura R. Soerjo, which were used as a learning resource for biology. This study used a purposive sampling technique. The method used is a combination of paths and checkered lines. The data analysis technique used is the Importance Value Index (INP), the dominance index, the diversity index, the wealth index, and the evenness index. The results showed that the identification of plant vegetation diversity was found as many as 33 species from 17 families that came from 3 divisions. The highest INP was found at the seedling level. The value of the dominance index is less than 1. The results show that the value of the density index is low, because it has a value of <3.5. The evenness value is at a high value, except at the tree level.

Download Full-text

Struktur dan Komposisi Hutan Mangrove di Kampung Sakartemin Distrik Fakfak Tengah, Kabupaten Fakfak, Papua Barat

JURNAL BIOLOGI PAPUA ◽

10.31957/jbp.1108 ◽

2021 ◽

Vol 13 (1) ◽

pp. 74-81

Author(s):

Gail Watofa ◽

Ning S. Astuti ◽

Amadion Andika Wanaputra

Keyword(s):

Mangrove Forest ◽

Mangrove Ecosystem ◽

Tree Level ◽

Survey Method ◽

Importance Value Index ◽

Importance Value ◽

Mangrove Species ◽

Rhizophora Stylosa ◽

Mangrove Vegetation ◽

The Government

Sakartemin is one of the village Fakfak Regency which has naturally growing mangrove forest. However, due to the economic development, the government should build up some infrastructures near by those mangrove forest. The disturbance nearby mangrove ecosystem cause changes in structure and composition of mangrove vegetation. This study aims to identify the types of mangrove vegetation and to find out the structure and composition of mangrove forest in Sakartemin Village, Central Fakfak District, Fakfak Regency. The method that used in this study is vegetation survey method combining path and checkered line method. The result shown that mangrove species in the sakartemin village consist of 5 families, namely: Rhizophoraceae, Meliaceae, Soneratiaceae, Pandanaceae, and Myrsinaceae which consists of 7 species namely: Rhizophora stylosa, R. apiculata, Xylocarpus granatum, Soneratia alba, Bruguiera gymnhoriza, Pandanus sp., and Aegiceras corniculatum. At the seedling level found 1002 individuals, sapling level found 404 individuals, and tree level found 319 individuals. The highest importance value index (IVI) at seedling level was R. stylosa 55.41% and the lowest was A. corniculatum 9.49%. The highest IVI at sapling level was R. apiculata 57.72% and the lowest was Pandanus 5.49%. The highest IVI at the tree level was R. apiculata 88.62% and the lowest was B. gymnhoriza 42.45%.Key words: Sakartemin village; mangrove; structure; composition; Fakfak.

Download Full-text

Berücksichtigung neuer parameter in der strukturanalyse von tropischen urwäldern

Silva Gandavensis ◽

10.21825/sg.v26i0.995 ◽

1971 ◽

Vol 26 ◽

Author(s):

H. Finol

Keyword(s):

Present Article ◽

Tropical Forests ◽

Natural Regeneration ◽

Relative Frequency ◽

Vertical Structure ◽

Forest Type ◽

Ecological Value ◽

Importance Value Index ◽

Importance Value ◽

Horizontal Structure

Consideration of new parameters in the analysis of the structure of tropical virgin forests - Till now in the analysis of the structure of tropical forests only parameters of the horizontal structure have been taken in consideration, when calculating the importance value index on base of relative frequency, abundancy and dominance. However in many cases the importance value index did not result to be a correct ecological value for the species componing the forests. In the present article it is proposed to take into account the vertical structure also, based on the new parameters "sociological position", and "natural regeneration". As the mentioned example shows (table 3), the ecological value of each species seems more correctly represented in the investigated forest type in this case as by the importance value index only.

Download Full-text