scholarly journals Secondary succession of woody plants following sand mining in the Soesdyke-Linden area, Guyana: A Chronosequence study

2021 ◽  
Vol 17 (1) ◽  
pp. 067-081
Author(s):  
Sherilyn Jeanette Inniss
Keyword(s):  
Species Diversity ◽  
Woody Plants ◽  
Secondary Succession ◽  
Limited Resources ◽  
Sand Mining ◽  
Importance Value Index ◽  
Importance Value ◽  
Ecological Disturbance ◽  
The Family ◽  
Undisturbed Site

Sandy soils comprise a large proportion of low productivity areas of Guyana on the Soesdyke-Linden Highway, where there is ecological disturbance and evidence of secondary succession after sand mining activities. This study investigated secondary succession of woody plants on abandoned sand mining locations. Secondary succession was studied inferentially by comparing sites in a homogeneous zone that was abandoned at different times post disturbance due to sand mining. Species diversity and community composition at five (5) sites which included an undisturbed area and areas at 3, 5, 10, and 15 years after the disturbance of sand mining were studied. Fifteen 10m x 10m plots were sampled for woody plants with a DBH of more than 2.5cm, and 1m x 1m sub-plots were randomly selected and sampled for seedlings with a DBH less than 2.5cm. A total of 241 plants were recorded, encompassing 22 species across 16 Families. Tapiria marchandii of the family Anacardiaceae dominated the chronosequences of 5, 10, and 15 years and recorded the highest Importance Value Index (IVI) of 112.88, 154.51, and 215.42, respectively. Dimorphandra conjugata of the family Fabaceae also adapted well to conditions post sand mining in the latter chronosequences of 10 and 15 years with IVIs of 54.17 and 38.83, respectively. The youngest site of three years exhibited the highest species diversity post the disturbance of sand mining; however, the undisturbed site possessed the highest overall species diversity. Species diversity of chronosequences decreased with age as competition for limited resources increased and the dominant species proliferated.

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

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

scholarly journals The Species Diversity and Structure of The Limited Production Forest in Arui Watershed of Manokwari District of West Papua, Indonesia

2019 ◽  
Vol 11 (2) ◽  
pp. 279-288
Author(s):  
Mahmud Mahmud ◽  
Ambar Kusumandari ◽  
Sudarmadji Sudarmadji ◽  
Nunuk Supriyatno
Keyword(s):  
Species Diversity ◽  
Wiener Index ◽  
Systematic Sampling ◽  
Forest Conversion ◽  
Vegetation Analysis ◽  
Importance Value Index ◽  
Importance Value ◽  
Forestry Sector ◽  
West Papua ◽  
Chisocheton Ceramicus

The detailed causal factors of flood have not been established, whether because of the damage of upper watershed, sedimentation resulting in shallow river, forest conversion, the decrease in abundance and structure or high rainfall. The study aimed at finding out the species diversity and structure of the limited production forest (LPF) from the seedling to the tree stage of Arui watershed in Manokwari district. The species diversity was determined based on Shannon-Wiener index, while vegetation structure was determined based on Importance Value Index. There were totally 92 plots of samples drawn using systematic sampling. The results of vegetation analysis showed that there were 174 species of 43 families with the species diversity of 1.5-1.8 that was categorized as moderate. The four dominant species that were always found in seedling, sapling, pole and tree stages included: Pometia pinnata, Teijsmanniodendron bogoriense, Chisocheton ceramicus, and Horsfieldia irya. The conversion of the LPF into non-forestry sector for the purpose of accelerating development must be reviewed by considering hydrology, land, biodiversity, and social and regional aspects in order to prevent and to reduce flood in the coming days.

scholarly journals Quantitative analysis, distributional pattern and species diversity of woody plant species of Lamberi Forest Range, Rajouri, J&K, India

2018 ◽  
Vol 10 (1) ◽  
pp. 522-527
Author(s):  
Jyoti Sharma ◽  
Anil K. Raina
Keyword(s):  
Quantitative Analysis ◽  
Species Diversity ◽  
Plant Species ◽  
Woody Plant ◽  
Diversity Indices ◽  
Distributional Pattern ◽  
Importance Value Index ◽  
Importance Value ◽  
Pinus Roxburghii ◽  
Woody Plant Species

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.

scholarly journals Keanekaragaman Coccinellidae Predator Pada Beberapa Ekosistem Perkebunan di Kabupaten Dharmasraya

2019 ◽  
Vol 10 (2) ◽  
pp. 157-168
Author(s):  
Siska Chiko Efendi ◽  
Yaherwandi Yaherwandi ◽  
Ade Noferta ◽  
Aditya Muhammad
Keyword(s):  
Species Diversity ◽  
Dominant Species ◽  
Wiener Index ◽  
Simpson Index ◽  
Importance Value Index ◽  
Importance Value ◽  
Important Value Index ◽  
Sweep Net ◽  
Species Importance

The objectives of this research were to study the species diversity and to determine the dominant species of lady bird beetle predators in high land plantation ecosystem in West Sumatera. The samples were taken by hand collection and sweep net. The data of species diversity were analyzed using Shannon-Wiener index, evenness of species were analyzed by Simpson index, and  dominant species using important value index. The results showed that there were 91 individuals predator found which consisted of 7 species. The highest  species diversity (1.74) and evenness (0.89) were found in Pulau Punjung. The lowest diversity and evennes (1,40) and (0,75) was found in Koto Besar. The highest  species importance value index was 1,00, that was Menochillus sexmaculatus.

scholarly journals Komposisi Jenis, Struktur Komunitas, dan Keanekaragaman Mangrove Asosiasi Langge Kabupaten Gorontalo Utara-Provinsi Gorontalo

2019 ◽  
Vol 17 (1) ◽  
pp. 181
Author(s):  
Sukirman Rahim ◽  
Dewi Wahyuni K Baderan
Keyword(s):  
Community Structure ◽  
Species Diversity ◽  
Relative Density ◽  
Relative Frequency ◽  
Diversity Index ◽  
Mangrove Forests ◽  
Chromolaena Odorata ◽  
Importance Value Index ◽  
Importance Value ◽  
Nypa Fruticans

Hutan mangrove Langge yang terdapat di Kecamatan Anggrek Kabupaten Gorontalo Utara memiliki keunikan dari pola zonasi dan keanekaragaman jenis. Hal ini yang menjadikan hutan mangrove di kawasan tersebut sebagai objek wisata tracking mangrove yang dikenal dengan nama “mangrove in love. Hutan mangrove memiliki berbagai fungsi ekologis yang sangat kompleks yakni sebagai daerah pemijahan  (spawing ground), tempat asuhan (nursery ground), dan tempat mencari makan (feeding ground) biota laut yang beraneka jenis dan memiliki fungsi ekonomis diantaranya buah mangrove dapat diolah menjadi berbagai produk kue dan sumber pangan alternatif pengganti beras. Penelitian ini bertujuan untuk : 1) untuk mengetahui komposisi jenis mangrove asosiasi; 2) untuk mengetahui struktur komunitas dari hutan mangrove Langge; dan 3) nilai Indeks Keanekaragaman. Adapun metode yang digunakan dalam penelitian ini adalah metode jalur berpetak (kombinasi plot dan transek). Jumlah spesies yang ditemukan akan dilihat untuk menjadi dasar penentuan komposisi jenis. Untuk pengkuran struktur komunitas mangrove dengan melakukan perhitungan terhadap Kerapatan Relatif (KR) dan Frekuensi Relatif (FR). Selanjutnya data yang didapatkan ditabulasikan untuk memperoleh nilai Indeks Nilai Penting (INP). Perhitungan keanekaragaman jenis menggunakan rumus (Sannon-wienner). Hasil penelitian menemukan 12 spesies tumbuhan mangrove asosiasi yakni Acanthus spinosus, Chromolaena odorata, Crassocephalum sp, Calotropis gigantean, Ipomea pes-caprae, Ricinus communis Excoecaria agallocha, Scaevola taccada, Spinifex littoreus, Terminalia catappa, Derris trifoliate dan Nypa fruticans. Struktur komunitas menunjukkan Chromolaena odorata memiliki nilai INP sebesar 33,2%, Kerapatan Relatif sebesar 24,91%, dan Frekuensi Relatif sebesar 8,33%.  Spesies dengan nilai INP terendah dimiliki oleh Nypa fruticans yaitu sebesar 9,14%, Kerapatan Relatif sebesar 0,81%, dan Frekuensi Relatif sebesar 8,33%. Nilai Indeks Keanekaragaman (H’) mangrove asosiasi sebesar 2,175 dan termasuk dalam kriteria tingkat keanekaragaman sedang. Data yang diperoleh ini dapat digunakan dalam pengelolaan hutan mangrove di Gorontalo Utara serta dapat menjadi database dalam usaha konservasi mangrove guna mengurangi efek pemanasan global.Langge mangrove forest located in the District of North Gorontalo District Orchid has a uniqueness of zoning patterns and keanekragaman types. This is what makes the mangrove forests in the region as a tourist attraction tracking mangrove known as the "mangrove in love. Mangrove forests have a variety of ecological functions is very complex which is a spawning area (spawing ground), point of care (nursery grounds), and foraging (feeding ground) various types of marine life and has the economic function of which pieces of mangrove can be processed into various products cake and alternative food sources instead of rice. This study aims to: 1) to determine the association of mangrove species composition; 2) to determine the community structure of mangrove forests Langge; and 3) the value of diversity index. The method used in this study is a terraced path method (combination of plots and transects). The composition of the types of views based on the number of species found. For sizing mangrove community structure by calculating the Relative Density (KR) and Relative Frequency (FR). Then the data obtained are tabulated to get the value of Importance Value Index (IVI). Calculation of species diversity using the formula (Sannon-wienner). The study found an association of twelve species of mangrove plants and the relative dominance (DR), then the data obtained are tabulated to get the value of Importance Value Index (IVI). Calculation of species diversity using the formula (Sannon-wienner). The study found an association of eight species of mangrove plants and the relative dominance (DR), then the data obtained are tabulated to get the value of Importance Value Index (IVI). Calculation of species diversity using the formula (Sannon-wienner). The study found an association of twelve species of mangrove plantsnamely Acanthus spinosus, Chromolaena odorata, Crassocephalum sp, Calotropis gigantean, Ipomea pes-caprae, Ricinus communis Excoecaria agallocha, Scaevola taccada, Spinifex littoreus, Terminalia catappa, Derris trifoliate dan Nypa fruticans. Community structure showed Chromolaena odorata has a value of IVI of 33,2%, amounting to 24,91% Relative Density and Relative Frequency of 8,33%. The species with the lowest IVI owned by Nypa fruticans that is equal to 9,14%, 0,81% Relative Density and Relative Frequency of 8,33%. Values Diversity Index (H ') at 2.175 and mangrove associates included in the criteria for a medium level of diversity. The data obtained can be used in the management of mangrove forests in North Gorontalo and can be a database of mangrove conservation efforts to reduce the effects of global warming.

scholarly journals Species diversity, composition, and heterospecific associations of trees in three altitudinal gradients in Bird's Head Peninsula, Papua, Indonesia

2020 ◽  
Vol 21 (8) ◽  
Author(s):  
Sepus Marten Fatem ◽  
Dony Aristone Djitmau ◽  
Antoni Ungirwalu ◽  
Alfredo Ottow Wanma ◽  
Victor Immanuel Simbiak ◽  
...  
Keyword(s):  
Species Diversity ◽  
Floristic Composition ◽  
Taxonomic Diversity ◽  
Importance Value Index ◽  
Importance Value ◽  
Mountain Areas ◽  
Vegetation Diversity ◽  
Elevation Gradients ◽  
Altitudinal Gradients ◽  
Bird's Head

Abstract. Fatem SM, Djitmau DA, Ungirwalu A, Wanma AO, Simbiak VI, Benu NMH, Tambing J, Murdjoko A. 2020. Species diversity, composition, and heterospecific associations of trees in three altitudinal gradients in Bird's Head Peninsula, Papua, Indonesia. Biodiversitas 21: 3596-3605.  The region of Bird's Head Peninsula, West Papua, Indonesia has a high level of vegetation diversity distributed from coastal to mountain areas. Yet, the information regarding this diversity is limited. We studied species diversity, composition, and heterospecific association of trees in three altitudinal gradients in Bird's Head Peninsula to reveal the biotic phenomenon in the region. Systematic random sampling was applied during data collection in three locations representing lower, middle, and upper altitudes of natural tropical forest. We applied diversity indices to investigate taxonomic diversity, importance value index (IVI) to reveal floristic composition and canonical correspondence analysis (CCA) for heterospecific associations. In total, we recorded 30 families, 44 genera, and 66 species in the three locations. There were 20 families in lower area and each 15 families in middle and upper areas while the genera per site were 29 in lower, 20 in the middle, and 18 in the upper. The number of species found in lower, middle, and upper areas was 35 species, 24 species, and 27 species respectively. The research revealed that the taxonomic diversity of trees generally decreases as the elevation increases in terms of family, genera, and species level. The dominant species was also different across elevation gradients in which the dominant tree had a different pattern in the three locations between understory and upperstory. Moreover, the gradient of elevation has shaped the type of tree communities, suggesting interactions and associations among tree species. Of all species recorded, 26 species were listed in IUCN Red List with two species were under data deficient, 20 species were least concern, three species were near threatened, and one species was vulnerable.

scholarly journals Impact of Exclosure on Species Diversity, Population Structure and Regeneration Status of Woody Plants in Lowland Northern Tigray, Ethiopia

2019 ◽  
pp. 1-14
Author(s):  
Nuru Mohammed
Keyword(s):  
Population Structure ◽  
Species Diversity ◽  
Species Composition ◽  
Water Conservation ◽  
Woody Plants ◽  
Woody Plant ◽  
Basal Area ◽  
Northern Ethiopia ◽  
Importance Value Index ◽  
Regeneration Status

Aim: This study was conducted to assessing woody plant composition, population structure and regeneration status in lowland exclosure (EX) of Northern Ethiopia. Study Design: Investigation of parameters was undertaken from 71 plots with size of 20 m x 10 m laid systematically along transect lines for vegetation data. These 200 m2 plots were used for assessment of trees with DBH >5 cm. Small quadrats of 4 m*4 m (16 m2) nested within the bigger plots was laid at the four corners and center of each plots. These were used for measuring seedling and sapling individuals. To analyze species diversity, population structure and regeneration status of woody plants were by computing abundance, density, basal area, Importance value index (IVI) and using Shannon-Weiner diversity and evenness indices. Results: According to vegetation survey result, a total of 23, 17 and 26 woody species were recorded, at Kara, Erba and Shektekli exclosures (EXs), respectively. While 8, 7 and 5 species of woody plant were in open grazing land (OGL). The total mean densities of all woody plants were found to be 1530, 1480 and 2999 individual’s ha-1 at Kara, Erba and Shektekli in EXs. Conclusion: The study suggested that the regional government have to considering EXs as useful for restoration or rehabitation strategy in the region, the vegetation in all the EXs in the study sites have a higher species composition, diversity, density, increment of basal area and regeneration woody plants than OGL, as a result of management differences in EXs. However, there are also variation on species composition, diversity, density increment of basal area and regeneration woody plants among exclosures having similar age and altitude for instance the species recorded in Erba site is lower than with other of EXs, This could be due to among local site characteristic variation and high grazing happen before Ex establishment exists. Therefore, we need to apply soil and water conservation, enrichment planting with indigenous tree species and strengthen local management institution in effectively protect the exclosure.

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

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

<p><em>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 </em><em>had been </em><em>conducted </em><em>in </em><em>June</em><em> to August 2011 in the Kebak Village, Jumantono District, Karanganyar Regency</em><em> </em><em>with a </em><em>altitude of </em><em>330</em><em> meters above sea level and soil type alvisol. </em><em>This</em><em> experiment </em><em>used</em><em> survey methods with observation unit is divided into three categories based on the size of the homegarden: narrow (&lt;700 m<sup>2</sup>), medium (700-900 m<sup>2</sup>) and large (&gt; 900 m<sup>2</sup>). 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.</em></p><p> </p>

scholarly journals Analisis Vegetasi Pada Habitat Gajah Sumatera Di Suaka Margasatwa Padang Sugihan Provinsi Sumatera Selatan

2013 ◽  
Vol 15 (1) ◽  
pp. 1
Author(s):  
Agnes Indra Mahanani ◽  
Ign Budi Hendrarto ◽  
Tri Retnaningsih Soeprobowati
Keyword(s):  
Species Diversity ◽  
Cynodon Dactylon ◽  
Natural Habitat ◽  
Index Formula ◽  
Natural Food ◽  
Importance Value Index ◽  
Importance Value ◽  
Melaleuca Cajuputi ◽  
Panicum Repens ◽  
Wildlife Reserve

Padang Sugihan Wildlife Reserve covering 86,932 hectares is the natural habitat of elephants in South Sumatra, both wild and managed elephants at Elephant Training Center, Sub Padang Sugihan. This area was used to be production forest. To support life of wild elephants, the vegetation quantity and diversity of vegetation types of feed must be known. This study aimed to analyze the vegetation feed elephants in Padang Sugihan Wildlife Reserve. The method used sampling plots with a size of 1m x 1m and 5m x 5m in five study sites. Data were analyzed using analysis of vegetation to get the importance value index. Species diversity was calculated using the Shannon Wienner Index formula. It was also calculated the value of uniformity of plant based on Simpson formula. The results of importance value index showed that location I was dominated by Echinochloa colonum (L.) Link (76.55%), location II Panicum astagninum R (132.48%), location III  Panicum repens L (107.14%), location IV Axonopus caompressus ( 79.48%), location of V Panicum repens L and Cynodon dactylon (L.) Pers. (21.28%), location VI Melaleuca cajuputi (80.77%), and location VII Melaleuca cajuputi (84.08%). The value of the highest species diversity in the location of V at 2.53. The lowest value was in location II at 0.66. The highest uniformity index was 0.92. While the lowest value was 0.37 in the location II. Based on the above results it is necessary to enrich the vegetation species of elephant grass and natural food, especially at locations II and III.   Keyword: Padang Sugihan Wildlife Reserve, vegetation analysis, Elephas maximus sumateranus Temminck  

scholarly journals KEANEKARAGAMAN KANTONG SEMAR (Nepenthes spp) PADA SEMAK BELUKAR DAN AREAL TERBUKA DI KEBUN RAYA SAMBAS KABUPATEN SAMBAS KALIMANTAN BARAT

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Rinny Yuniarty ◽  
Iswan Dewantara ◽  
Ratna Herawatiningsih
Keyword(s):  
Species Diversity ◽  
Dominant Species ◽  
Morphological Analysis ◽  
Botanical Garden ◽  
Survey Method ◽  
Open Area ◽  
Importance Value Index ◽  
Importance Value ◽  
A Value ◽  
High Diversity

Sambas Botanical Garden is a conservation forest area that has a high diversity of flora and one of them is the Kantong Semar (Nepenthes spp). Research aims; (1) conducting a study of the species diversity of Kantong Semar (Nepenthes spp) in shrubs and open areas in the Sambas Botanical Garden, (2) Study to changes in the composition of Kantong Semar species (Nepenthes spp) in Sambas Botanical Garden, (3) determining species composition and dominant of kantong semar (Nepenthes spp) that grows in shrubs and open areas. This research was conducted by a survey method in which the laying of observation plots by purposive sampling. The results of the study showed that the species diversity of Kantong Semar (Nepenthes spp) in the Sambas Botanical Garden was a low category with a value of 0.254 in shrubs and an open area of 0.01756. There was a change in the composition of the Kantong Semar species after two years of previous research. The change occurred where two new species of N. xneglecta and N.gracilis Korth that grown in Sambas Botanical Garden. Based on the results of morphological analysis, we found as many as 5 species of Kantong Semar consisting of N. mirabilis (Lour) Druce, N.gracilis Korth, N.ampullaria Jack, N. xneglecta, N. xhookeriana, which grow in shrubs, and N. mirabilis (Lour) in open area. The results of the analysis of the Importance Value Index (INP) that dominant species are N.ampullaria Jack with a value of 107.02 and N. xhookeriana 33.32 where both species of Kantong Semar grown in the shrub area.Keywords: Kantong semar (Nepenthes spp), shrubs and open area, Species diversity.

Sign in / Sign up

Export Citation Format

Share Document