scholarly journals Main trends in the dynamics of forest plantations in the buffer zone of the Novopolotsk Refinery Complex (based on the results of a 25-year research)

2020 ◽  
Vol 65 (1) ◽  
pp. 30-42
Author(s):  
I. P. Voznyachuk ◽  
A. A. Molozhavski ◽  
A. V. Sudnik ◽  
N. L. Voznyachuk
Keyword(s):  
Buffer Zone ◽  
Primary Forest ◽  
Leeward Side ◽  
Forest Fragments ◽  
Initial State ◽  
Plant Groups ◽  
Structure Of Communities ◽  
Composition And Structure ◽  
Ability To Regenerate ◽  
Spruce Stands

The unique results of the 25-year monitoring of forest vegetation of the buffer zone at the Novopolotsk Refinery Complex (NIRC) were summarized. The analysis of quantitative and qualitative changes in the buffer zone, which occurred during the period 1990–2015 years of operation of NRC’s enterprises, is given. Detailed analysis of vegetation organization has shown that the most transformed forest areas are directly adjacent to the enterprises from the leeward side. During the 25-year period of research, the area of primary forest fragments in the 500-meter zone of NRC impact has decreased by 2.6 times. Derivatives of small-leaved communities formed at the place of dead coniferous stands immediately after the commissioning of the plants are presented here. The technogenic press reduction in the 1990s resulted in the active demutation transformations of vegetation. Recently, there has also been a dominance of restoration processes, but the change of the main pine and spruce stands to derivatives continues, which is reflected in the prolonged decomposition of fragments of previously disturbed stands. The direction and rates of change of some plant groups by others depend on the initial state of plants, species and age structure of communities, conditions of their growth and environmental factors. In general, it is noted that forest ecosystems of the region have retained the ability to regenerate the composition and structure.

scholarly journals The distribution and density of Tapanuli orangutans (Pongo tapanuliensis) at potential corridor locations between forest fragments in Batang Toru, North Sumatra, Indonesia

2020 ◽  
Vol 21 (11) ◽  
Author(s):  
ARFAH NASUTION ◽  
DYAH PERWITASARI-FARAJALLAH ◽  
S. SUCI UTAMI-ATMOKO
Keyword(s):  
Buffer Zone ◽  
Primary Forest ◽  
Line Transect ◽  
Forest Fragments ◽  
Infrastructure Development ◽  
Buffer Zones ◽  
Population Number ◽  
Term Survival ◽  
Undisturbed Forest ◽  
North Sumatra

Abstract. Nasution A, Perwitasari-Farajallah D, Utami-Atmoko SS. 2020. The distribution and density of Tapanuli orangutans (Pongo tapanuliensis) at potential corridor locations between forest fragments in Batang Toru, North Sumatra, Indonesia. Biodiversitas 21: 5382-5388. The newly discovered Tapanuli orangutan (Pongo tapanuliensis) is in danger of being lost in a few decades due to their small population number in fragmented forest of Batang Toru. The major threats faced by this critically endangered ape, including: hunting, habitat loss, and fragmentation due to large infrastructure development and other developments in the key corridor area. The establishment of corridor and buffer zone is one such effort to maintain their population and bring them from the brink of extinction. Data on the population and distribution are needed to assess and provide baseline information for investigating the habitat condition of potential corridors and buffer zones. This study aimed to analyze population and distribution of Tapanui orangutan (Pongo tapanuliensis) in buffer zone and potential corridor of Batang Toru. Our study provides an initial dataset prior to the development of the hydrodam, which is important to understand the future post-development impact. The study was carried out in disturbed (Hutaimbaru and Bulu Mario) and undisturbed forest (Sitandiang and Hopong) of Batang Toru from June 2015 until February 2016. Orangutan nest, fig (Ficus spp.), and trees bearing fruit were recorded using a line transect method. This research showed that population and distribution of orangutan were influenced by forest conditions, threat level, and fruit availability. There were fewer nests per km2 in disturbed forest than in undisturbed forest, resulting in an orangutan density estimation to be 0.24 ind/km2, 0.14 ind/ km2 (Hutaimbaru and Bulu Mario) and 0.74 ind/km2, 0.36 ind/km2 (Sitandiang and Hopong). Number of nest in transects was influenced by the availability of fig class I and class II, but not fruit tree. The APL forest of Sitandiang is key area to connect the three populations of Tapanuli orangutan: east Batang Toru, west Batang Toru, and Sibualbuali. Furthermore, orangutan’s nests were encountered both in protected and non-protected forest, thus protection of such areas, especially areas including primary forest that harbor orangutan is essential for their long term survival. The conservation measures and action Tapanuli orangutan is alarming, thus we recommend all remaining habitat should be officially and strictly protected and collaboration work with multi-stakeholder is essential to establish the corridor as well as the strategic management plan of Tapanuli orangutan.

scholarly journals Agroforestry system as a buffer zone in a Brazilian Atlantic Forest conservation unit: an artificial nest predation perspective

2018 ◽  
Vol 18 (1) ◽  
Author(s):  
Camila André Galvão ◽  
Mercival Roberto Francisco ◽  
Marcelo Nivert Schlindwein
Keyword(s):  
Atlantic Forest ◽  
Nest Predation ◽  
Buffer Zone ◽  
Agroforestry System ◽  
Camera Traps ◽  
Primary Forest ◽  
Forest Fragments ◽  
Artificial Nest ◽  
Buffer Zones ◽  
Predator Species

Abstract Here we inferred about the effectiveness of a buffer zone composed by an Agroforestry System (AS) for providing reproductive conditions for Atlantic Forest birds by comparing artificial nest predation rates between a buffer zone, a primary forest area, and a set of small and isolated Atlantic Forest fragments. We have used 237 nests throughout the three areas, of which 100 (42.2%) were depredated. Predation frequencies were 28.6% in the continuous forest, 100% in the AS, and 51.9% in the fragments, differing significantly. We could detect nest predators in 48 of the 100 depredated nests (48%) using camera traps. Differences between areas may be attributed to changes in nest predator species. We support previous evidences that the conservation of bird communities may not rely on buffer zones as an extension of their breeding habitats.

Litter thickness and soil pH influence the diversity of saprotrophic fungi in primary forest fragments in the Amazon

Pedobiologia ◽  
2021 ◽  
pp. 150771
Author(s):  
Maria Elisa Ferreira de Queiroz ◽  
Josiane Santana Monteiro ◽  
Arleu B. Viana-Junior ◽  
Catarina de Lurdes Bezerra Praxedes ◽  
Patrick Lavelle ◽  
...  
Keyword(s):  
Soil Ph ◽  
Primary Forest ◽  
Forest Fragments ◽  
Saprotrophic Fungi ◽  
Ph Influence

scholarly journals A research on magnetic properties of magnetic nanodispersed lubricants

2019 ◽  
Vol 298 ◽  
pp. 00015 ◽  
Author(s):  
Alexander Bolotov ◽  
Vladislav Novikov ◽  
Olga Novikova
Keyword(s):  
Magnetic Properties ◽  
Experimental Studies ◽  
Operating Conditions ◽  
Oil Composition ◽  
Initial State ◽  
Optimal Operating ◽  
Composition And Structure ◽  
Friction Mode ◽  
Hall Sensors ◽  
Lubricating Properties

The paper presents the results of theoretical and experimental studies of the magnetic properties of magnetic lubricating oils. It shows oil magnetization curves in the initial state and after tests in the boundary friction mode. Oil properties were measured by an original magnetometer with Hall sensors. It has been established that triboeffects change oil composition and structure and decrease its magnetization. The results will help determine the optimal operating conditions of magnetic oils while maintaining their magnetic and lubricating properties.

Distance effect from cloud forest fragments on plant community structure in abandoned pastures in Veracruz, Mexico

2006 ◽  
Vol 22 (4) ◽  
pp. 431-440 ◽  
Author(s):  
Miguel Angel Muñiz-Castro ◽  
Guadalupe Williams-Linera ◽  
José María Rey Benayas
Keyword(s):  
Species Richness ◽  
Vegetation Structure ◽  
Forest Restoration ◽  
Cloud Forest ◽  
Distance Effect ◽  
Basal Area ◽  
Woody Species ◽  
Primary Forest ◽  
Forest Fragments ◽  
Forest Region

Secondary succession was studied in a Mexican cloud forest region along a chronosequence of 15 abandoned pastures (0.25–80 y). Our objective was to determine the effects of distance from the forest border on successional vegetation structure and woody species richness along the chronosequence. Vegetation structure similar to that of mature forests recovered over 40–50 y, both close to (0–10 m) and away from (40–50 m) the border. Total woody species richness was similar for both distances but species composition differed significantly. When primary forest species were analysed separately, basal area, height, abundance and richness were all significantly higher close to the forest border. Primary species such as Quercus spp. (barochorous-synzoochorous) and Carpinus caroliniana (anemochorous) had lower basal area, density and height away from the border than close to it. Secondary species such as Lippia myriocephala (anemochorous) and Myrsine coriacea (endozoochorous) did not differ in their rate of colonization between distances. The limitation of seed dispersal and establishment for primary woody species away from forest borders suggests that propagules need to be introduced to accelerate forest restoration.

scholarly journals Very small relict populations suggest high extinction debt of gingers in primary forest fragments of a tropical city

2016 ◽  
Vol 104 (1) ◽  
pp. 182-189 ◽  
Author(s):  
Matti A. Niissalo ◽  
Jana Leong-Škorničková ◽  
Gillian S. Khew ◽  
Edward L. Webb
Keyword(s):  
Primary Forest ◽  
Forest Fragments ◽  
Extinction Debt ◽  
Relict Populations

Changes in seed rain during secondary succession in a tropical montane cloud forest region in Oaxaca, Mexico

2008 ◽  
Vol 24 (4) ◽  
pp. 433-444 ◽  
Author(s):  
R. F. del Castillo ◽  
M. A. Pérez Ríos
Keyword(s):  
Seed Dispersal ◽  
Secondary Succession ◽  
Cloud Forest ◽  
Seed Rain ◽  
Stand Age ◽  
Primary Forest ◽  
Forest Fragments ◽  
Long Distance ◽  
Southern Mexico ◽  
Tropical Montane Cloud Forests

AbstractSeed dispersal is the first stage of colonization, and potentially affects recruitment. This process deserves more attention in tropical montane cloud forests (TMCF), since secondary succession is common owing to episodic disturbances. We studied annual seed rain in 10 nearby forest stands, ≈7 to ≈100 y following shifting agriculture, and one primary forest stand in southern Mexico to test the hypothesis that seed rain is limited at the scale of neighbouring fragments and that such limitation differs among species with different dispersal modes and successional origin. Annual seed rain was heterogeneous among forest fragments probably due to the prevalence of local seed dispersal, differences in stand age and the proportion of zoochory, and may help explain the patchy distribution of species observed in TMCF. Seed rain abundance and species diversity per unit trap area increased with the age of the stand. Biotically dispersed seeds increased towards older stands relative to abiotically dispersed seeds. Late-successional seeds were rarer in early successional stands than pioneer seeds in late-successional stands, suggesting that long-distance dispersal is generally more common for pioneer plants. Seed dispersal appears to constrain forest regeneration and to influence fragment species composition as a function of the distance from the source forests.

scholarly journals Orchid Flora of Laos: findings from a survey of limestone karst vegetation in Vang Vieng, Vientiane Province, Laos

2016 ◽  
Vol 8 (12) ◽  
pp. 9397 ◽  
Author(s):  
Pankaj Kumar Sahani ◽  
Stephan W. Gale ◽  
André Schuiteman ◽  
Somsanith Bouamanivong ◽  
Gunter A. Fischer
Keyword(s):  
Monsoon Season ◽  
Lao Pdr ◽  
Primary Forest ◽  
Conservation Priorities ◽  
Herbarium Specimens ◽  
Forest Fragments ◽  
Northeast Monsoon ◽  
Botanic Garden ◽  
The Family ◽  
Major Project

A major project to study the phytodiversity of the Indo-Burma Biodiversity Hotspot was initiated by Kadoorie Farm and Botanic Garden, Hong Kong, in 2011, with the aim of surveying primary forest fragments and identifying conservation priorities within this expansive but highly threatened ecoregion. The Vang Vieng area of Vientiane Province, northern Laos, was chosen as a focus for a pilot expedition, since it features an extensive karst landscape that has barely been explored. Together with officials from the Ministry of Science and Technology, Government of Lao PDR, surveys of three sites were conducted in April 2012, at the end of the dry northeast monsoon season. A total of 283 herbarium specimens were collected. These collections comprised nearly 180 specimens from the family Orchidaceae, of which approximately 136 were unique taxa. At least one of these is a species new to science and a further nine represent new distributional records for Laos. A list of the species encountered during the study is presented and the significance of the findings is discussed. Major threats to the natural environment in northern Laos are highlighted.

scholarly journals Complex Small-Holder Agriculture in Rainforest Buffer Zone, Sri Lanka, Supports Endemic Birds

2021 ◽  
Vol 9 ◽  
Author(s):  
Juliana Hanle ◽  
Balangoda M. P. Singhakumara ◽  
Mark S. Ashton
Keyword(s):  
Land Use ◽  
Species Richness ◽  
Sri Lanka ◽  
Buffer Zone ◽  
Small Scale ◽  
Forest Fragments ◽  
Buffer Zones ◽  
Bird Abundance ◽  
Point Counts ◽  
Zone Management

The Sinharaja rainforest in southwestern Sri Lanka is a protected forest in a largely agriculture-dominated landscape. In keeping with global UNESCO global biosphere reserves planning, the Sinharaja is surrounded by a buffer zone of regenerating forest and villages with small tea plots and multi-strata tree gardens (homegardens). Globally, however, conservation planning lacks standards on buffer zone management. We ask what relationships exist between village land use and bird assemblages, which are effective ecosystem indicators. Birds have been little studied across land use and vegetation structure in actively managed, large, protected forest buffer zones. To that end, we ran spatially- and temporally-replicated bird point counts across tree gardens, forest fragments, and tea plots within a Sinharaja village. Tree gardens held a greater abundance of birds across habitat association, conservation concern, diet, and endemic species than forest fragments or tea plots. Forest fragments and tree gardens hosted statistically similar numbers of birds in some subsets, but their species assemblages differed. In tea plots, greater shade tree species richness correlated with greater bird abundance and species richness. Our results support the argument for programs to support complex small-scale tree-based agroforestry embedded in buffer zone regenerating forest.

scholarly journals АГРОБІОЛОГІЧНА ХАРАКТЕРИСТИКА AMBROSIA ARTEMISIFOLIA L. В УМОВАХ ЛУГАНСЬКОЇ ОБЛАСТІ

2019 ◽  
pp. 15-20
Author(s):  
Ю. В. Гаврилюк
Keyword(s):  
Growing Season ◽  
Ambrosia Artemisiifolia ◽  
Current State ◽  
Plant Groups ◽  
Composition And Structure ◽  
Synanthropic Species ◽  
Quarantine Species ◽  
Asteraceae Family ◽  
Anthropic Pressure ◽  
Species Composition And Structure

Current state of the flora of Ukraine, which is under constantly growing anthropic pressure, is characterized by the change in species composition and structure of vegetation, a significant increase in its role as an anthropophilic element. Big economic activity creates the prerequisites for the conversion of native vegetation to impoverished and less valuable, partly or wholly formed of synanthropic species, many of which are quarantine weeds. Invasion and further active distribution, and in some cases the expansion of the species of adventive fraction of the flora, take place both naturally and anthropically. In Luhansk region, the emergence and spread of quarantine weeds poses a threat of an expansive nature, as an aggressive quarantine species such as Ambrosia artemisifolia L. grows in all types of crop phytocenoses and beyond, and every year its habitats increase. The article shows the results of multi-year researches, aimed at establishing the directions of distribution and expansion of plant groups by the quarantine species of the Asteraceae family (Ambrosia artemisiifolia L.).The study shows that the number of the researched species in the last ten years has increased two- or threefold in such plant groups as agrophytocenosis, sylvophytoculturcenosis, urbophytoculturcenosis, meadows and pastures. In result , we emphasize that Ambrosia artemisiifolia L. is no longer a quarantine species to which restricted species belong, as this weed is infinitely distributed and is already a cosmopolitan, whereas phytosanitary services are commonly called quarantine, but limited Unfortunately, no one can expand it. In our opinion, time is significantly lost, and one way to prevent the further spread of Ambrosia artemisiifolia L. is the total mowing of plants before flowering of all populations in all crop plant groups (where it is impossible to apply chemical tillage) 5-7 times per growing season, not to allow the growing season replenishment of a bank of seeds of this weed in soil.

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