scholarly journals Thành phần loài và phân bố của mối từ Quảng Bình đến Huế

2017 ◽  
Vol 33 (1S) ◽  
Author(s):  
Nguyen Minh Duc ◽  
Bui Thi Lo ◽  
Do Thi Ngoc Anh ◽  
Nguyen Thi My ◽  
Nguyen Van Quang ◽  
...  
Keyword(s):  
Secondary Forest ◽  
Species Number ◽  
Primary Forest ◽  
Forest Habitat ◽  
Termite Species ◽  
Number Of Species ◽  
Central Vietnam ◽  
Study Results ◽  
Total Species ◽  
Comprehensive Study

The result on termite survey from Quang Binh to Thua Thien Hue provinces identified 84 species belonging to 22 genera, 8 subfamilies and 3 families. In comparison with the previous study results, our study newly recorded 27 species and 3 genera in Quang Binh province, two genera in Quang Tri province and six species in Thua Thien Hue province. When we analysed the contribution of termites in different habitats and altitudinal bands, the results showed that the secondary forest habitat has the highest number of species (62 species, accounting for 73.81% of total species number of the studied area), followed by primary forest habitat (41 species, accounting for 48,81%), plantation habitat (34 species, accounting for 40.48%) and resident area with the lowest number of species (23 species, accounting for 27.38%); the number of termite species in the altitudinal band 300-700m is the highest (52 species, accounting for 61.90% of total species number of the studied area), by that in the altitudinal band <300m (41 species, 48.81%), in the altitudinal band 701-1000m (38 species, accounting for 45.23%) and the least is in the altitudinal band > 1000m (21 species, accounting for 25.00%). This is the firstly comprehensive study on composition and distribution of termites in three provinces of Central Vietnam.  

Effect of Temperature on Butterfly Community (lepidoptera) at Gunung Meja Recreational Forest Area, Manokwari, Papua Barat

2016 ◽  
Vol 1 (1) ◽  
Author(s):  
Rawati Panjaitan
Keyword(s):  
Secondary Forest ◽  
Environmental Parameters ◽  
Forest Area ◽  
Effect Of Temperature ◽  
Species Number ◽  
Primary Forest ◽  
Residential Areas ◽  
Number Of Species ◽  
Butterfly Community ◽  
The Impact

<p>Gunung Meja is one of the forest areas in Manokwari, West Papua province. It has been designated as a recreational forest since 1980. Gunung Meja covers 460.25 ha and is located at 75–175 m a.s.l. Gunung Meja is directly adjacent to residential areas, therefore the community activities, such as felling trees and gardening, was conducted in the area frequently. These can interfered the existence of flora and fauna in the area, included butterflies. To reveal the impact of intrusive human activities on the forest area, it was necessary to obtain basic information about what flora and fauna are present there. This study was aim to record the butterfly community in the area. Observations of butterflies were done by scan sampling on primary forest, secondary forest, gardens and settlements. Sampling and measurement of environmental parameters were performed in the morning and afternoon for seven weeks. This study recorded 113 species and 4.049 individuals of butterflies. There were 75 species in primary forest, 77 species in secondary forest, and 63 species in gardens and settlements. The number of species found was still increasing until the last day of the observation. Shannon-Wiener index (H’) calculation showed that diversity in primary and secondary forests were 3.48 and 3.50, respectively, thus classified as high (H’ &gt; 3). Sorensen index calculation (C<em><sub>N</sub></em>) showed high value reaching 0.5 quantitatively. The numbers of butterflies both species number and individual number, observed in the morning were higher than those in the afternoon. There was significant effect (P &lt; 0.05) of temperature on the number of individual butterflies. The result of PCA analysis showed that the environmental parameters in primary forest, secondary forest, gardens and settlements influenced the number of species and number of individuals.</p>

scholarly journals Sampling principles for biodiversity study

2013 ◽  
Author(s):  
Xubin Pan
Keyword(s):  
Mathematical Expectation ◽  
Specific Area ◽  
Species Number ◽  
Basic Principles ◽  
Number Of Species ◽  
Individual Number ◽  
Species Area ◽  
Biodiversity Study ◽  
Number Of Individuals ◽  
Total Species

Sampling is a fundamental tool in ecology and critical for biodiversity measurement. However, basic principles of biodiversity sampling have been overlooked for many years. In this paper, I proposed and explored five principles of sampling for a specific area and biodiversity study. The first principle of sampling, species increasing with area, is that the number of species increases with the area. The second principle of sampling, individuals increasing with area, is that the number of individuals increases with the area. The third principle of sampling, sum of species number, is that the sum of species number in one area and species number in another area is no less than the total species number in the two areas. The fourth principle of sampling, individual complement, is that the sum of the mathematical expectation of individual number of one or several species in the area a and that of the same one or several species in the area A-a is the total individual number N of the same one or several species in the total area A. The fifth principle of sampling, species-area theory, is that the sum of the mathematical expectation of number of species in the area a and that of number of species lost if area A-a is cleared is the total species number M in the total area A.

scholarly journals Diversity, structure and composition of pteridophyte in varying habitats in Karimun Besar Island, Riau Islands Province, Indonesia

2021 ◽  
Vol 22 (11) ◽  
Author(s):  
Nery Sofiyanti ◽  
Dyah Iriani ◽  
Ikhwan Taufiq ◽  
Maya Sari ◽  
Andre Irawan ◽  
...  
Keyword(s):  
Coastal Area ◽  
Secondary Forest ◽  
Small Island ◽  
Primary Forest ◽  
Tropical Region ◽  
Rubber Plantation ◽  
Small Islands ◽  
Number Of Species ◽  
Study Sites ◽  
Diversity Structure

Abstract. Sofiyanti N, Iriani D, Taufik I, Sari M, Irawan A, Syauqi FM. 2021. Diversity, structure and composition of pteridophyte in varying habitats in Karimun Besar Island, Riau Islands Province, Indonesia. Biodiversitas 22: 4847-4856. Biodiversity of small islands, particularly in tropical region, always encourages scientific curiosity. Such curiosity is much greater when the small island of interest has been through various land use changes, such as in Karimun Besar Island. This island is one of thousand islands in Riau Islands Province, Indonesia and poses different land uses. However, studies on the biodiversity of flora in this island have not been recorded, including for pteridophyte or fern members. This study aimed to examine the diversity, floristic structure and composition of pteridophyte at six different study sites in Karimun Besar Island representing varying habitat conditions (i.e., primary forest, secondary forest, rubber plantation, road side, coastal area and mined land. The sampling was collected by using transect method to measure density, dominance and frequency. A total of 32 species of pteridophytes were recorded from the six study sites that belong to two divisions, Polypodiophyta (31 species) and Lycophyta (1 species). The number of species of pteridophyte varied across the six habitats. The highest number of species (21) was found in primary forest, while the lowest (9 species) was found in rubber plantation. The dominant species for each study site were Taenitis blechnoides (Pteridaceae) (rubber plantation), Dicranopteris linearis (Gleicheniaceae) (secondary forest), Sticherus truncates (Gleicheniaceae) (primary forest), Pteridium caudatum (Dennstaedtiaceae) (road side), Achrosticum aureum (Pteridaceae) (coastal area) and Nephrolepis hirsutula (Nephrolepidaceae) (mined land). The result of this study provides the first data of fern in Karimun Besar Island that support pivotal information on the biodiversity of small islands in tropical region.

Detection Probability and Site Occupancy of the Granular Spiny Frog (Quasipaa verrucospinosa) in the Tropical Rain Forests of Bach Ma National Park, Central Vietnam

2020 ◽  
Vol 27 (1) ◽  
pp. 26-32
Author(s):  
Binh Van Ngo ◽  
Ya-Fu Lee ◽  
Chung D. Ngo
Keyword(s):  
National Park ◽  
Large Scale ◽  
Secondary Forest ◽  
Site Occupancy ◽  
Weather Conditions ◽  
Primary Forest ◽  
Occupancy Models ◽  
Tropical Rain Forests ◽  
Amphibian Species ◽  
Central Vietnam

Amphibian species are rarely detected with perfect accuracy, regardless of the method employed. A large-scale assessment for Quasipaa verrucospinosa occupancy was conducted at 35 sites in the primary forest and 42 sites in the secondary forest of Bach Ma National Park, central Vietnam. Based on the detection data for each site, the distribution of Q. verrucospinosa was estimated in different habitat types using occupancy models. From the best model among all performed models, we estimated a site occupancy probability of 0.576 that was higher than the naive occupancy estimate of 0.403 and a 43.1% increase over the site proportion at which Q. verrucospinosa was actually observed. The site covariate of the primary forest was an important determinant of site occupancy, which was not associated with the variable of secondary forest. In a combined AIC model weight: the p(temperature), p(humidity), and p(precipitation) models have 47.3, 67.1, and 90.9% of the total, respectively; providing evidence that aforementioned environmental conditions were important sample covariates in modelling detection probabilities of Q. verrucospinosa. Our results substantiate the importance of incorporating detection and occupancy probabilities into studies of habitat relationships and suggest that the primary forests associated with weather conditions influence the site occupancy of Q. verrucospinosa in Bach Ma National Park, central Vietnam.

scholarly journals Kelimpahan Populasi Capung Jarum (Zygoptera) di Kawasan Taman Nasional Bogani Nani Wartabone, Sulawesi Utara (Population Abundance of Damselfly (Zygoptera) in Bogani Nani Wartabone National Park, North Sulawesi)

2014 ◽  
Vol 2 (1) ◽  
Author(s):  
Wakhid Wakhid ◽  
Roni Koneri ◽  
Trina Tallei ◽  
Pience V Maabuat
Keyword(s):  
Random Sampling ◽  
National Park ◽  
Sampling Method ◽  
Secondary Forest ◽  
Primary Forest ◽  
Population Abundance ◽  
Number Of Species ◽  
Transect Line ◽  
North Sulawesi ◽  
Family Based

Abstrak Capung jarum (Zygoptera) berperan penting bagi keberlangsungan ekosistem.Pada suatu ekosistem, serangga ini berfungsi sebagai agen pengendali hayati dan bioindikator lingkungan.Penelitian ini bertujuan untuk menganalisis kelimpahan capung jarum yang ada pada tiga habitat di Kawasan Taman Nasional Bogani Nani Wartabone, Sulawesi Utara.Pengambilan sampel dilakukan secara purposive random sampling. Koleksi capung jarum  menggunakan teknik sweepingmengikuti garis transek sepanjang 500 m pada setiap tipe habitat. Jumlah transek pada setiap tipe habitat sebanyak 3 garis transek yang dibuat sepanjang aliran sungai.Hasil penelitian didapatkan sebanyak 13 spesies capung jarum yang terdiri dari 4 famili, yaitu Coenagrionidae, Chlorocypidae, Calopterygidae, dan Platycnemididae. Famili yang paling banyak ditemukan jumlah spesiesnya adalah Coenagrionidae, sedangkan yang paling sedikit Platycnemididae. Berdasarkan tipe habitat, jumlah spesies yang paling banyak ditemukan di hutan primer sedangkan yang paling sedikit di hutan sekunder.Kelimpahan capung jarum tertinggi terdapat pada lahan pertanian, sedangkan kelimpahan terendah pada habitat hutan primer Kata kunci : capung jarum, Taman Nasonal Bogani Nani Wartabone, Sulawesi Utara Abstract Damselfly (Zygoptera) plays important roles in the environment and this organism ia able to be used as biocontrol and bioindicator. This research was aimed to analyze the abundance of damselfly that werelocated at three different habitats in Bogani Nani Wartabone National Park, North Sulawesi. The purposive random sampling method was used to collect the samples. Damselflies were taken by using sweeping technique following 500 m transect line in each habitat. There were three transect lines in each habitat located along the river. The results showed that there were thirteen species from 4 families (Coenagrionidae, Chlorocypidae, Calopterygidae, and Platycnemididae) of damselfly. Most species were members of Coenagrionidae whereas the others werePlatycnemididae Family. Based on the types of habitat, the highest number of species was found in the primary forest, whereas the smallest number was in the secondary forest. Greatest the abundance of damselfly was the largest in the agricultural area and the smallest was in the primary forest. Keywords: damselfly, Bogani Nani Wartabone National Park, North Sulawesi

Spider diversity in the Bukit Timah Nature Reserve, Singapore

2019 ◽  
Vol 71 ((suppl.1)) ◽  
pp. 209-243
Author(s):  
J.K.H. Koh ◽  
D.J. Court
Keyword(s):  
Nature Reserve ◽  
New Records ◽  
Secondary Forest ◽  
Distinct Species ◽  
Primary Forest ◽  
Preliminary Results ◽  
Vegetation Zones ◽  
Comprehensive Survey ◽  
Quantitative Analyses ◽  
First Time

This paper discusses the preliminary results of the first comprehensive survey of the spiders of the Bukit Timah Nature Reserve (BTNR) in Singapore. Two plots were established in each of the three zones of vegetation, viz., primary forest, old secondary forest, and maturing secondary forest. They were repeatedly sampled over an 18-month period. Sorting of the collection so far suggests that the three vegetation zones harbour rather different spider assemblages. Only ~9% of the total spider fauna recovered was shared by all three zones. The results have also yielded a preliminary picture of dominance, abundance and rarity. Although first intended to obtain a baseline for future quantitative analyses, the survey became a testing ground to modify and refine methodology so as to conduct future quantitative surveys with greater scientific rigour. Taxonomic work on the samples so far shows that the spiders in the BTNR span over 43 families, of which six families are listed for the first time in Singapore. The tally is summarised in an interim checklist of BTNR spiders. The checklist, with a total of 317 entries, shows that there are 158 described species of spiders in BTNR, of which 25 species are new records for Singapore. Another 159 morphospecies are provisionally recognised as distinct species, some of which may be new to science. Our observations during the survey have allowed us to provide a narrative of BTNR spider diversity against a backdrop of their microhabitat specialisation.

MANAJEMEN DATA SPASIAL: PENGGUNAAN TANAH WILAYAH PEDESAAN DI SUMATERA BARAT

2019 ◽  
Vol 5 (2) ◽  
pp. 48-53
Author(s):  
Afrital Rezki, S.Pd., M.Si ◽  
Erna Juita ◽  
Dasrizal Dasrizal ◽  
Arie Zella Putra Ulni
Keyword(s):  
Land Use ◽  
Paddy Field ◽  
Secondary Forest ◽  
Water Bodies ◽  
Primary Forest ◽  
Land Uses ◽  
Forest Land ◽  
Land Use Patterns ◽  
Crop Fields ◽  
Mixed Plantations

Perkembangan penggunaan tanah bergerak horisontal secara spasial ke arah wilayah yang mudah diusahakan. Penggunaan tanah juga bergerak secara vertikal dalam rangka menaikkan mutunya. Penelitian ini bertujuan untuk menganalisis pola penggunaan lahan, bagaimana manajemen penggunaan lahan di satu wilayah berdasarkan batas Nagari. Metode yang digunakan adalah analsisis spasial dengan interpretasi citra penginderaan jauh, survey lapangan, dan analisis deskriptif. Pertumbuhan pemukiman Nagari Sungai Sariak Kecamatan VII Koto Kabupaten Padang Pariaman mengakibatkan pemanfaatan ruang menjadi tumpang tindih. Diperlukan cara-cara pengelolaan dan managemen penggunaan tanah dalam rangka pembangunan berkelanjutan yang menaikkan taraf hidup masyarakat dan tidak menimbulkan kerugian lingkungan.Terdapat 9 jenis penggunaan lahan yang ada di Nagari Sungai Sariak. Penggunaan lahan tersebut adalah Primary Forest, Secondary Forest, Paddy Field, Settlement, Mixed Plantations, Crop Fields, Water Bodies, Bushes, dan Plantations. Penggunaan lahan yang paling luas di Nagari Sungai Sariak adalah jenis penggunaan lahan Primary Forest, sebesar 48% dari total luas wilayah Nagari Sungai Sariak. Pada tahun 2011 sampai tahun 2016, penggunaan lahan paling luas terjadi pada penggunaan lahan jenis Primary Forest yang kemudian menjadi Mixed Plantations. Land use Changes moved horizontally spatially towards areas that are easily cultivated. The land use also moves vertically in order to increase its quality. This study aims to analyze land use patterns, how land use management in one area is based on Nagari boundaries. The method used is spatial analysis with interpretation of remote sensing images, field surveys, and descriptive analysis. The growth of Nagari Sungai Sariak in Kecamatan VII Koto, Kabupaten Padang Pariaman resulted in overlapping use of space. Management methods are needed and management of land use in the framework of sustainable development that raises the standard of living of the community and does not cause environmental losses. There are 9 types of land use in the Nagari Sungai Sariak. The land uses are Primary Forest, Secondary Forest, Paddy Field, Settlement, Mixed Plantations, Crop Fields, Water Bodies, Bushes, and Plantations. The most extensive land use in Nagari Sungai Sariak is the type of Primary Forest land use, amounting to 48% of the total area of the Nagari Sungai Sariak. From 2011 to 2016, the most extensive land use occurred in Primary Forest land uses which later became Mixed Plantations.

scholarly journals Responses of Bat Communities (Mammalia: Chiroptera) to Forest Loss and Habitat Conversion in Southern Cameroon

2021 ◽  
Vol 14 ◽  
pp. 194008292110103
Author(s):  
Patrick Jules Atagana ◽  
Eric Moïse Bakwo Fils ◽  
Sevilor Kekeunou
Keyword(s):  
Secondary Forest ◽  
Biosphere Reserve ◽  
Abundant Species ◽  
Primary Forest ◽  
Habitat Types ◽  
Habitat Transformation ◽  
Significant Difference ◽  
Southern Cameroon ◽  
Habitat Conversion ◽  
Species Specific

We aimed to assess how bats are affected by habitat transformation by comparing bat assemblages in four habitat types: primary forest, secondary forest, cocoa plantations and human habitations in the Dja Biosphere Reserve of southern Cameroon. Bats were sampled in the four habitat types using mist nets. During 126 nights, a total of 413 bats were captured, belonging to four families, 16 genera and 24 species. Ninety three individuals (17 species) were captured in the primary forest, followed by plantations (105 individuals, 14 species), human habitations (159 individuals, 10 species), and secondary forest (55 individuals, eight species). Megaloglossus woermanni was recorded in all the four habitats, and was the most abundant species (105 individuals). The analysis of bat assemblage between habitat types showed a statistically significant difference in species composition. The distribution of the six most abundant species ( Epomops franqueti, Megaloglossus woermanni, Rousettus aegyptiacus, Dohyrina cyclops, Hipposideros cf. caffer and Hipposideros cf. ruber) was influenced by habitat types. Our results suggest that the decrease in species richness observed in disturbed habitats may be due to habitat perturbations of primary forest habitats. Therefore, it is important to examine the effects of habitat conversion at species level, as responses are often species-specific.

scholarly journals Composition and Distribution of Deep Water Macroalgae Species from the Continental Shelf of Sergipe State, Brazil

Phytotaxa ◽  
2014 ◽  
Vol 190 (1) ◽  
pp. 250 ◽  
Author(s):  
Sonia Maria Barreto Pereira ◽  
JULIANA TORRES ◽  
Lisia Monica de Souza Gestinari
Keyword(s):  
Continental Shelf ◽  
Deep Water ◽  
Number Of Species ◽  
Total Species ◽  
New Occurrences ◽  
Benthic Macroalgae

This study investigates the deep-water flora of the continental shelf in Sergipe State, Brazil located between 10º36’08’’ – 11º21’07’’S and 36º28’10’’ – 37º13’47’’W. The samples were collected by dragging at 18 sampling sites, between 10 to 30 m depth, from May 1999 to March 2000. A total of 91 taxa of marine benthic macroalgae were identified (56 Rhodophyta, 20 Heterokontophyta and 15 Chlorophyta). Forty-seven (47) of these are new occurrences for Sergipe flora. Rhodophyta dominated, accounting for 61% of the total species collected, with the order Ceramiales having the highest number of species present (39.55%), followed by Heterokontophyta (23%), mostly represented by Dictyotales (65%). Finally, 15 Chlorophyta taxa were found (16%), mainly composed of Bryopsidales (53%).

scholarly journals Status and distribution of the Pemba flying fox Pteropus voeltzkowi

Oryx ◽  
1997 ◽  
Vol 31 (2) ◽  
pp. 135-142 ◽  
Author(s):  
Abigail Entwistle ◽  
Nadia Corp
Keyword(s):  
Secondary Forest ◽  
Primary Forest ◽  
The West ◽  
Pregnant Females ◽  
Fruit Bat ◽  
Flying Fox

The Pemba flying fox Pteropus voeltzkowi is a fruit bat endemic to the island of Pemba, off Tanzania. A total of 41 reported roosting areas were visited in June and July 1995, and 19 occupied roosts were located, most of them in the west of the island, and on small islets off the west and south of Pemba. Roosts were situated in primary forest, secondary forest (overgrown clove plantations), traditional graveyards and mangrove areas. A range of sizes and species of trees were used as roosts. The minimum population of P. voeltzkowi was estimated to be between 4600 and 5500 individuals. In total 94 per cent of the population was located at 10 roost sites. Larger colonies were associated with roosts located in forests, which together supported 75 per cent of the total bat population. Colonies were of mixed sex, but no young or obviously pregnant females were observed. Major threats to this species appeared to be hunting and deforestation (both logging and clearing for agriculture) and P. voeltzkowi is considered to be endangered.

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