scholarly journals Preliminary data on centipedes (Chilopoda: Scolopendromorpha and Scutigeromorpha) in Ta Xua natural reserve, Son La Province, Vietnam

2018 ◽  
Vol 40 (1) ◽  
pp. 100-107
Author(s):  
Tran Thi Thanh Binh ◽  
Nguyen Duc Hung ◽  
Ha Kieu Loan ◽  
Vu Thi Ha
Keyword(s):  
Species Composition ◽  
New Records ◽  
Diversity Index ◽  
Mixed Forest ◽  
Natural Forest ◽  
Northwestern Part ◽  
Bamboo Forest ◽  
Natural Forests ◽  
Natural Reserve ◽  
Study Results

 Study on centipedes was conducted in Muong Thai commune, Ta Xua Natural Reserve, Son La in May and November 2017. Samples were collected in four typical habitats: natural forests, bamboo mixed forests, bamboo forests and agro-residental areas. As a result, a total of 17 species and subspecies in two orders (Scolopendromorpha and Scutigeromorpha) was recorded in that region. Of which, the order Scolopendromorpha has 15 recorded species and subspecies belonging to 7 genera, 3 families (Cryptopidae, Scolopendridae, Scolopocryptopidae). The other order, Scutigeromorpha, has only one species in one family (Scutigeridae). The study results also contributed new records of 13 species in 7 genera to the centipede fauna of the northwestern part of Vietnam, and 1 genus, Thereuonema, to the Vietnamese fauna.Among four habitats, natural and bamboo forests have highest similarity on species composition, but agro-residental area and bamboo forest have lowest value on species composition. The diversity index (H’) is highest in bamboo forests (2,98), decreases in mixed forest (2,31), natural forest (1,67) and agro-residental area (0,74). In contrast, centipede density is highest in natural forest (0,60 ind./m2), reduces in bamboo forest (0,47 ind./m2) and mixed forest (0,20 ind./m2).

scholarly journals Community Structure of Dragonfly (Ordo: Odonata) in Natural Forest and Tourist Sites Petungkriyono Forest, Central Java, Indonesia

2021 ◽  
Vol 6 (3) ◽  
pp. 67328
Author(s):  
Nur Apriatun Nafisah ◽  
R.C.Hidayat Soesilohadi
Keyword(s):  
Community Structure ◽  
Tropical Rainforest ◽  
Diversity Index ◽  
Natural Forest ◽  
Natural Forests ◽  
Community Based ◽  
Central Java ◽  
Wiener Diversity Index ◽  
Index Value ◽  
Total Species

Petungkriyono forest is a tropical rainforest with high biodiversity. The increasing tourism activities in Petungkriyono lead to land conversion. Dragonfly (order Odonata) is a good bioindicator for aquatic and terrestrial. This study aimed to compare the community structure of Odonata in natural forests and tourist sites. The method of collecting imago Odonata was done by direct searching, samples were captured using sweep netting. The results showed that the dragonflies found in all locations consisted of the same family, 2 families (Gomphidae and Libellulidae) from the suborder Anisoptera and 6 families (Calopterygidae, Chlorocyphidae, Coenagrionidae, Euphaidae Platycnemididae, and Platystictidae) from the suborder Zygoptera. The total species of dragonflies found in Sokokembang were 15 species with a total of 293 individuals, Tirta Muncar 13 species of 287 individuals, Karanggondang 17 species of 276 individuals, and Curug Lawe 14 species of 242 individuals. The highest relative abundance of individuals was in the natural forest of Sokokembang is Drepanosticta spatulifera (26.28%) and in Karanggondang Vestalis luctuosa (24.64%), while in the tourist forests of Tirta Muncar and Curug Lawe were Euphaea variegata (34.84% and 28.51 %). The structure of the Odonata community is based on the Shannon-Wiener diversity index in the natural forests of Sokokembang (2.18) and Karanggondang (2.21) at the tourist sites of Tirta Muncar (1.84) and Curug Lawe (2.11). The results showed that the structure of the Odonata community based on the level of the diversity index value, evenness index, and dominance index in natural forests and tourist sites in Petungkriyono forest was not significantly different. 

scholarly journals Microclimate determines community composition but not richness of epiphytic understory bryophytes of rainforest and cacao agroforests in Indonesia

2009 ◽  
Vol 36 (2) ◽  
pp. 171 ◽  
Author(s):  
S. Goda Sporn ◽  
Merijn M. Bos ◽  
Monika Hoffstätter-Müncheberg ◽  
Michael Kessler ◽  
S. Robbert Gradstein
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Community Composition ◽  
Natural Forest ◽  
Native Forest ◽  
Shade Trees ◽  
Natural Forests ◽  
High Turnover ◽  
Forest Flora ◽  
Understory Trees

Management intensification in cultivated, tropical forests drives changes in the microclimate that can threaten native forest flora and fauna. In this study, we use epiphytic bryophytes, known to be sensitive to microclimatic changes due to their lack of a protective cuticle and the exposed habitat, to investigate the predictive power of microclimate for changes in species richness and composition. Bryophytes were sampled from understory trees in natural forest and cacao (Theobroma cacao L.) trees in two types of cacao agroforests (natural shade trees and planted shade trees) in Central Sulawesi, Indonesia. The microclimate in the agroforests was characterised by low air humidity and high air temperature during the afternoon. Bryophyte species richness did not differ between habitat types but species composition changed markedly from the natural forest to the cacao agroforests. Although no correlation between species richness and microclimate values could be found, a series of matrix-based analyses revealed a significantly positive relationship between similarities in species composition and in maximum values for temperature and minimum values for humidity, which suggests that microclimatic changes are a good predictor for high turnover of bryophyte community composition from natural forests to cacao agroforests.

scholarly journals Dampak Jangka Pendek Penjarangan Hutan Campuran terhadap Keanekaragaman Serangga Terbang di KPH Banten (Short-Term Impact of Thinning of Mixed Forest on the Diversity of Flying Insects in Forest Management Unit of Banten)

2021 ◽  
Vol 9 (1) ◽  
pp. 138
Author(s):  
Ahmad Budiaman ◽  
Noor Farikhah Haneda ◽  
Sarah Nova Irene Lumbantobing
Keyword(s):  
Species Composition ◽  
Diversity Index ◽  
Mixed Forest ◽  
Similarity Index ◽  
Forest Environment ◽  
Forest Thinning ◽  
Flying Insects ◽  
Evenness Index ◽  
The Impact ◽  
Richness Index

Forest thinning is a sylvicultural practice that aims to provide better growth space for increasing tree growth and stand quality. Forest thinning is a form of forest disturbance that has an impact on the forest environment, including flying insects. This study aimed to assess the impact of thinning of mixed forest stands on the diversity of flying insects. Eight circular plots of 0.1 ha were laid out systematically on thinning plots of 15.3 ha. Parameters observed in the plot included environment factors (stand composition, temperature, humidity, and canopy cover), abundance, species composition, and biodiversity index of flying insects (diversity index, species richness index, evenness index, and similarity index).  The sweep net was used to collect the flying insects. Mann-Whitney test was used to compare the index of biodiversity of flying insects before and after forest thinning. Forest thinning caused a decrease in abundance, species composition, diversity index, richness index, and evenness index of flying insects. Forest thinning led to a decrease in the abundance of herbivorous flying insects and an increase in the abundance of predatory flying insects. Flying insect species found before thinning was not identical to those after thinning.Keywords: diversity index, flying insect, forest ecosystem, forest tending

scholarly journals Komposisi Jenis dan Populasi Burung Cendrawasih di Kampung Malagufuk Distrik Klayili Kabupaten Sorong Provinsi Papua Barat

2020 ◽  
Vol 7 (2) ◽  
pp. 151-162
Author(s):  
MAYA PATTIWAEL ◽  
AMATUS TUROT
Keyword(s):  
Species Composition ◽  
Bird Species ◽  
Line Length ◽  
Natural Forest ◽  
Line Transect ◽  
Natural Forests ◽  
Diverse Species ◽  
West Papua ◽  
Line Transect Method ◽  
Papua Barat

One of the animals that are easy to find is a bird. Based on data about the increase in the number of bird species, it can be ascertained that these animals can be found in every region in Indonesia, with diverse species and even species that are endemic to a certain area. West Papua is one of the regions in Indonesia which is rich in various species of birds, including Cendrawasih which can also be found in the Natural Forest of Malagufuk Village, Klayili District, Sorong Regency. Based on information from the surrounding community, several types of Cendrawasih are often seen in the natural forests of Malagufuk Village, but their diversity and population are not known with certainty. This study aims to determine the diversity of species and population of Cendrawasih birds in the natural forest of Malagufuk Village, Klayili District, Sorong Regency, West Papua. Thus, the results of this study are expected to be a source of data in the context of preserving and protecting the existing Cendrawasih species. Data collection on the species composition and population of Cendrawasih was carried out using the Line Transect method by making 10 observation lines with a line length of 500 m each and a distance between lines of 100 m. The results showed that there were found 3 spesies of Cendrawasih with estimated populations and densities as follows: Cendrawasih Kuning Kecil (Paradisaea minor) had an estimated population of 7.48 individuals with a density of 2.93 individuals / ha; Cendrawasih Raja (Cicinnurus regius) has an estimated population of 5 individuals with a density of 1.67 individuals / ha; and Toowa Cemerlang (Ptiloris magnificus) had an estimated population of 2.22 individuals with a density of 0.74 individuals / ha. When the research was carried out, it was seen that the three types of Cendrawasih used several types of trees as places for activities (playing or dancing), namely Matoa (Pometia coreacea), Merbau (Intsia bijuga), Damar (Agathis dammara). Beringin (Ficus benjamina), and Pala hutan (Myristica sp) with tree heights above 20 m.

scholarly journals Comparison of humus form state in the beech and spruce parts of the Žákova hora National Nature Reserve

2019 ◽  
Vol 51 (Special Issue) ◽  
pp. 29-37 ◽  
Author(s):  
V. Podrázský
Keyword(s):  
Spatial Structure ◽  
Species Composition ◽  
Tree Species ◽  
Nature Reserve ◽  
Soil Layer ◽  
Natural Forest ◽  
Natural Forests ◽  
Tree Species Composition ◽  
Humus Forms ◽  
National Nature Reserve

The paper summarises main ideas concerning the structure of natural forest ecosystems at middle altitudes and documents the changes of humus forms and their chemistry in the natural forest of Žákova hora National Nature Reserve, in typical selected parts with different tree species composition: European beech – Norway spruce. The species composition, age and spatial structure are discussed and analysis of the uppermost soil layer is done in particular parts of the natural forest regeneration cycle, of different stages respectively. We compared the amount and layer composition of surface humus and basic pedochemical characteristics of holorganic and upper mineral horizons. The results document changes in the character of humus forms as a consequence of the tree species change. On the contrary, a high portion of uncertainty as for the species, age and spatial structure follows from discussion about the structure of natural forests at middle altitudes.

scholarly journals Comparative phytosociological assessment of three terrestrial ecosystems of Wayanad Wildlife Sanctuary, Kerala, India

2020 ◽  
Vol 12 (5) ◽  
pp. 15631-15645
Author(s):  
M. Vishnu Chandran ◽  
S. Gopakumar ◽  
Anoopa Mathews
Keyword(s):  
Dominant Species ◽  
Diversity Index ◽  
Vegetation Type ◽  
Terrestrial Ecosystems ◽  
Natural Forest ◽  
Vegetation Types ◽  
Mimosa Pudica ◽  
Natural Forests ◽  
Chromolaena Odorata ◽  
Wildlife Sanctuary

Phytosociological studies were conducted in three vegetation types in the WS II area of Wayanad Wildlife Sanctuary.  In each vegetation type, 85 quadrats (10 x 10 m) were laid to quantify the vegetation.  Natural forest showed comparatively higher species richness than plantation and vayal (swamps/low lying grassland).  In natural forest 96 plant species were present while it was 70 and 66 respectively in plantation and vayal.  Fabaceae was the dominant family in all the three vegetation types.  The natural forest was dominated by Chromolaena odorata, followed by Lantana camara, Mimosa pudica, Terminalia elliptica, Glycosmis pentaphylla.  In the plantations, Chromolaena odorata, Tectona grandis, Mimosa pudica and Glycosmis pentaphylla showed dominance.  The vayal was dominated by Arundinella leptochloa.  The second most dominant species in the vayal was Chromolaena odorata.  Other dominant species were Kyllinga nemoralis and Sporobolus tenuissimus.  Among the three, vayal recorded the highest Simpson Diversity Index.  The highest Berger-Parker Dominance Index value in plantation indicates the presence of dominant species. Natural forests recorded highest Margalef Richness Index and the least was in vayal.  The highest Pielou’s Wiener Equitability Index in vayal indicated all species are evenly distributed.  

scholarly journals Are plantations changing the tree species composition of New Brunswick's forest?

2002 ◽  
Vol 78 (6) ◽  
pp. 812-821 ◽  
Author(s):  
Thom Erdle ◽  
Jason Pollard
Keyword(s):  
Species Composition ◽  
Tree Species ◽  
Jack Pine ◽  
Natural Forest ◽  
Red Spruce ◽  
Natural Forests ◽  
Tree Species Composition ◽  
Forest Diversity ◽  
Species Dominance ◽  
Ecological Zones

Forest plantations are viewed by some as a means to meet the world's escalating demand for wood, and by others as a threat to forest diversity and ecological function. With the purpose of improving planting practices, we analysed recently available data on 15- to 30-year-old plantations on public land in New Brunswick to identify tree species composition differences between plantations and the natural forest they replaced. Presently, 9% of the public forests in the province has been planted; at current planting rates, this will increase to 17% by the year 2030. Plantations established between 1967 and 1982 differ little from the natural forest they replaced in terms of total softwood content, but differ markedly by having much higher jack pine and much lower red spruce contents. There is evidence of reduced diversity evenness in plantations at the landscape level, but at the stand level few plantations are true monocultures and the abundance of high single-species dominance in plantations is very similar to that of the natural forests they replaced. All species composition comparisons between plantations and replaced natural forest vary strongly by ecoregion. To reduce the degree of difference between plantations and the natural forest, planting practices and prescriptions should (a) broaden the mix of species used, and use less jack pine and more red spruce and cedar, (b) employ a mix of species at the stand level, and (c) consider more fully the site conditions and natural species composition of ecological zones. Key words: plantations, tree species composition, forest simplification, tree species diversity, forest management

Carabidae of Barnaul city parks: ecological characteristics and species composition

2018 ◽  
Vol 8 (2) ◽  
pp. 348-353
Author(s):  
E. A. Kuchina ◽  
N. D. Ovcharenko ◽  
L. D. Vasileva
Keyword(s):  
Species Composition ◽  
Diversity Index ◽  
Similarity Index ◽  
Life Forms ◽  
Ground Beetles ◽  
Forest Steppe ◽  
Ecological Groups ◽  
Dominant Group ◽  
Species Diversity Index ◽  
Steppe Species

<p>Anthropogenic impact on the population of ground beetles leads to a change in their numbers, structure of dominance, density, species composition, spectrum of life forms. This makes the beetles Carabidae a convenient and informative bioindicator of the ecological state of biocenoses. The material for this work was the Carabidae collections conducted in June-August 2016-2017 in the park zone of different regions of Barnaul, differing in location, area, hydrological regime, vegetation cover, purpose and anthropogenic load. When processing the material, the quantitative, species and generic composition of the carabidae was determined, calculations were made for such indicators as the Berger-Parker dominance index, the Shannon species diversity index (Hs), and the Jacquard species similarity index. The fauna (Coleoptera, Carabidae) of the park zone of Barnaul is represented by 55 species belonging to 20 genera. The dominant group is represented by species belonging to steppe, forest and polyzonal groups. Forest-steppe species of ground beetles as dominants have not been identified in any of the investigated territories. The greatest variety of ecological groups was noted on the territory of the Yubileyny рark, which is explained by the presence of zones with various microclimatic conditions, the presence of a birch grove that flows through the park with the Pivovarka River, and a wide log in the park. Registered species belong to eight groups of life forms belonging to two classes - zoophagous and myxophytophagous. On the numerical and species abundance, zoophages predominate. The spectrum of life forms corresponds to the zonal spectrum characteristic of the forest-steppe zone.</p><p> </p>

Langfristige Entwicklung von zwei Waldgesellschaften im Białowieża-Urwald

2008 ◽  
Vol 159 (4) ◽  
pp. 80-90 ◽  
Author(s):  
Bogdan Brzeziecki ◽  
Feliks Eugeniusz Bernadzki
Keyword(s):  
Species Composition ◽  
Tree Species ◽  
Stand Structure ◽  
Temporal Dynamics ◽  
Structural Parameters ◽  
Forest Communities ◽  
Natural Forests ◽  
Tree Species Composition ◽  
Strong Trend ◽  
Long Term Study

The results of a long-term study on the natural forest dynamics of two forest communities on one sample plot within the Białowieża National Park in Poland are presented. The two investigated forest communities consist of the Pino-Quercetum and the Tilio-Carpinetum type with the major tree species Pinus sylvestris, Picea abies, Betula sp., Quercus robur, Tilia cordata and Carpinus betulus. The results reveal strong temporal dynamics of both forest communities since 1936 in terms of tree species composition and of general stand structure. The four major tree species Scots pine, birch, English oak and Norway spruce, which were dominant until 1936, have gradually been replaced by lime and hornbeam. At the same time, the analysis of structural parameters indicates a strong trend towards a homogenization of the vertical stand structure. Possible causes for these dynamics may be changes in sylviculture, climate change and atmospheric deposition. Based on the altered tree species composition it can be concluded that a simple ≪copying≫ (mimicking) of the processes taking place in natural forests may not guarantee the conservation of the multifunctional character of the respective forests.

Carbon stock assessment through above-ground biomass of trees at different forest composition in Mt. Malindawag, Lubilan, Naawan, Misamis Oriental, Philippines

2021 ◽  
Vol 11 (01) ◽  
pp. 100-113
Author(s):  
M. G. Origenes ◽  
R. L. Lapitan
Keyword(s):  
Carbon Stock ◽  
Diversity Index ◽  
Stock Assessment ◽  
Mixed Forest ◽  
Forest Composition ◽  
Above Ground Biomass ◽  
Plantation Forest ◽  
Species Diversity Index ◽  
Ground Biomass ◽  
Number Of Individuals

It is documented that the amounts of carbon stored and its level of degradation in different forests compositions and different types of forest is mostly unknown, Philippines is no exemption as little was done in some places of this country. This study was conducted to assess carbon stock through above ground biomass of trees at different forest composition in Mt. Malindawag. There were three (3) 20m x 20m sample plots (quadrats) (400m2 equivalent to 0.04 ha) established as replicate plots provided with 50m intervals. Forest composition such as the Agroforestry area, mixed forest area and the Plantation forest were assessed in terms of the number of individuals, number of species, diameter, and height to calculate the biomass, tree biomass density as well as the carbon stock. Based on the results of the study conducted in different forest compositions of Mt. Malindawag, plantation forest has the highest carbon stocking rate. However, these results were not significantly different from the other forest composition. This was associated with a higher accumulated diameter, which resulted in higher biomass and eventually carbon stock. Species found in this forest composition are productive and have lesser number of individuals; therefore, there is lesser competition for resources such as light. Such a mechanism might contribute to the higher biomass and carbon stock. However, the result may not be right to other areas due to uncontrollable factors, anthropogenic and environmental factors. Hence, it is recommended to have further studies on areas where trees have similar age, species diversity index as well as stand development and site productivity for a more accurate and quantifiable carbon stock.

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