scholarly journals Short Communication: Growth patterns of Shorea leprosula and Dryobalanops lanceolata in Borneo’s forest managed with Selective Cutting with Line Replanting System

2019 ◽  
Vol 20 (4) ◽  
pp. 1160-1165
Author(s):  
MOHAMAD TAUFAN TIRKAAMIANA ◽  
RUHYAT PARTASASMITA ◽  
LEGOWO KAMARUBAYANA
Keyword(s):  
Line Width ◽  
National Parks ◽  
Growth Patterns ◽  
Selective Logging ◽  
Conservation Area ◽  
Selective Cutting ◽  
Permanent Sample Plots ◽  
Diameter Increment ◽  
Dryobalanops Lanceolata ◽  
Shorea Leprosula

Abstract. Tirkaamiana MT, Partasasmita R. Kamarubayana L. 2019. Growth patterns of Shorea leprosula and Dryobalanops lanceolata in Borneo’s forest managed with Selective Cutting with Line Replanting System. Biodiversitas 20: 1160-1165. Dryobalanops lanceolata is a species of plant in the family Dipterocarpaceae, which indigenous of Borneo. It is found in at least five protected areas (Kabilli-Sepilok Forest Reserve, Danum Valley Conservation Area, Ulu Temburong, Lambir, and Gunung Mulu National Parks), but is threatened elsewhere due to habitat loss. The demand for its timber is very high, so it requires conservation efforts while at the same time maintaining its productivity to meet the timber demand. One of the efforts to increase productivity of production forest in Indonesia is implementing Selective Logging with Line Replanting System (TPTJ). In this system superior species are planted in the planting lines. This study aimed to determine the growth of Shorea leprosula and Dryobalanops lanceolata planted in different planting line widths. Data of diameter increment of S. leprosula and D. lanceolata were obtained by observing 4 permanent sample plots (PUP) at concession areas of PT Balikpapan Forest Industries in Penajam Paser Utara, East Kalimantan, Indonesia. The results showed that the average diameter increment of S. leprosula and D. lanceolata at the planting line width of 3 meters was 1.47cm/yr and 0.74 cm/yr respectively, and at the planting line width of 6 meters was 2.08 cm/yr and 1.14 cm/yr respectively. The differences in planting line width had very significant effect on the growth and diameter increment of S. leprosula, presumably due to the increase of light intensity to optimal level which accelerates stomata opening and transpiration rate, thus affecting the rate of photosynthesis.

Forest land-use in Sabah, Malaysia: an introduction to Danum Valley

1992 ◽  
Vol 335 (1275) ◽  
pp. 331-339 ◽  
Keyword(s):  
National Parks ◽  
Forest Ecology ◽  
Forest Disturbance ◽  
Research Programme ◽  
The State ◽  
Selective Logging ◽  
Primary Forest ◽  
Lowland Forest ◽  
Conservation Area ◽  
Leading Role

The Malaysian state of Sabah occupies an area of 73 371 km 2 which is about 10% of the island of Borneo. A bout 60% of the land area is forested and 48% is gazetted as Permanent Forest Reserve or State or National Parks. The largest agent of forest disturbance is the timber industry, which plays a leading role in the state economy. A statutory body, the Sabah Foundation, holds a 100-year timber concession of 973 000 ha (9730 km 2 ) in the southeast of the state. Of this concession 9.7% has been reserved for conservation, including 43 800 ha (438 km 2 ) of uninhabited, mostly lowland forest in an area called Danum Valley. Since 1986, this has been the site of a field centre and a collaborative research programme devoted to comparative study of primary forest ecology and the impacts of selective logging. The paper includes a summary account of the ecology of the Danum Valley Conservation Area.

scholarly journals Estimating population sizes of lions Panthera leo and spotted hyaenas Crocuta crocuta in Uganda's savannah parks, using lure count methods

Oryx ◽  
2013 ◽  
Vol 48 (3) ◽  
pp. 394-401 ◽  
Author(s):  
Edward Okot Omoya ◽  
Tutilo Mudumba ◽  
Stephen T. Buckland ◽  
Paul Mulondo ◽  
Andrew J. Plumptre
Keyword(s):  
National Parks ◽  
Protected Area ◽  
National Park ◽  
Crocuta Crocuta ◽  
Panthera Leo ◽  
Analysis Method ◽  
Conservation Areas ◽  
Conservation Area ◽  
Population Sizes

AbstractDespite > 60 years of conservation in Uganda's national parks the populations of lions and spotted hyaenas in these areas have never been estimated using a census method. Estimates for some sites have been extrapolated to other protected areas and educated guesses have been made but there has been nothing more definitive. We used a lure count analysis method of call-up counts to estimate populations of the lion Panthera leo and spotted hyaena Crocuta crocuta in the parks where reasonable numbers of these species exist: Queen Elizabeth Protected Area, Murchison Falls Conservation Area and Kidepo Valley National Park. We estimated a total of 408 lions and 324 hyaenas for these three conservation areas. It is unlikely that other conservation areas in Uganda host > 10 lions or > 40 hyaenas. The Queen Elizabeth Protected Area had the largest populations of lions and hyaenas: 140 and 211, respectively. It is estimated that lion numbers have declined by 30% in this protected area since the late 1990s and there are increasing concerns for the long-term viability of both species in Uganda.

scholarly journals Integrating Economic Value of Environmental Services and Carbon Stock: A Case Study from Bogani Nani Wartabone National Park

2021 ◽  
Vol 940 (1) ◽  
pp. 012065
Author(s):  
N S Lestari ◽  
G K Sari ◽  
Kusmayanti ◽  
W V Ponekke ◽  
F Saputra ◽  
...  
Keyword(s):  
National Parks ◽  
Forest Ecosystem ◽  
National Park ◽  
Carbon Stock ◽  
Economic Value ◽  
Dry Forest ◽  
Environmental Services ◽  
Conservation Area ◽  
North Sulawesi ◽  
Market Approach

Abstract As a conservation area, national parks play essential roles in environmental services provision and have the potential to support the REDD+ program. This study aims to estimate appropriate incentives for national parks based on carbon units by integrating the economic value of environmental services and carbon stock provided by the lowland dry forest ecosystem in Bogani Nani Wartabone National Park (BNWNP) consisted of North Sulawesi and Gorontalo areas. Carbon stock was estimated by establishing sample plots, including five carbon pools. While the economic valuation of environmental services includes biodiversity using the market approach, ecotourism using the zonal travel cost method, and water service using simulation water regulation services method and market approach. The total ecosystem carbon stock in BNWNP is estimated at 73.67 Mton. Meanwhile, the estimation of the economic value of environmental services is about IDR 70.57 trillion. Based on these results, the appropriate carbon values are IDR 683,308 and IDR 1,304,238 per ton carbon for the lowland dry forest ecosystem in Gorontalo and North Sulawesi areas. This result indicates that given its essential environmental services, the incentive for protecting national parks may exceed the carbon value used in result-based payment scheme in REDD+ initiatives that have been implemented.

scholarly journals Stand structure and species composition of merbau in logged-over forest in Papua, Indonesia

2018 ◽  
Vol 19 (1) ◽  
pp. 163-171
Author(s):  
PRIJANTO PAMOENGKAS ◽  
ISKANDAR Z. SIREGAR ◽  
AJI NURALAM DWISUTONO
Keyword(s):  
Species Composition ◽  
Stand Structure ◽  
Selective Logging ◽  
Primary Forest ◽  
Growth Stages ◽  
Timber Species ◽  
Natural Forests ◽  
Selective Cutting ◽  
Average Value ◽  
Reference Plot

Pamoengkas P, Siregar IZ, Dwisutono AN. 2018. Stand structure and species composition of merbau in logged-over forest in Papua, Indonesia. Biodiversitas 19: 163-171. Single selective cutting is the most common form of timber extraction in natural forest in the tropics. Although, vast tracts natural forests are already logged-over, the effect of logging on the structure and species composition has been sparsely documented, especially for merbau (Intsia bijuga). Merbau is an excellent timber species and intensively harvested in Papua. The objective of this study was to analyze the structure and species composition of merbau in the several logged-over forests at different ages, i.e., 1, 5, 11, 16, 21 years old after selective logging and primary forest as the reference plot. The study was conducted in February 2016 at Sarmi District, Papua. The distributions of merbau in each plot varies but when they were compared with that in the primary forest that had reached 9.81%. Thus, the decrease of merbau trees in the plots of logged forest areas was not significant. Index of Diversity of all growth stages was high. In general, the number of merbau seedling regeneration in the study plots are above the average value standardized in Selective Cutting and Replanting System (TPTI) regulation. With regard to the condition of sapling regeneration, we concluded that selective logging might not provide enough growing space for regeneration of merbau. Providing appropriate growing space is one of the key factors to achieve adequate merbau natural regeneration.

scholarly journals An Individual-Tree Mortality Model for Complex Stands of Southeastern British Columbia

2005 ◽  
Vol 20 (2) ◽  
pp. 101-109 ◽  
Author(s):  
Hailemariam Temesgen ◽  
Stephen J. Mitchell
Keyword(s):  
British Columbia ◽  
Tree Species ◽  
Tree Mortality ◽  
Model Development ◽  
Mortality Rates ◽  
Average Deviation ◽  
Individual Tree ◽  
Permanent Sample Plots ◽  
Diameter Increment ◽  
Mortality Model

Abstract An individual-tree mortality model was developed for major tree species in complex stands (multi-cohort, multiaged, and mixed species) of southeastern British Columbia (BC), Canada. Data for 29,773 trees were obtained from permanent sample plots established in BC. Average annual diameter increment and mortality rates ranged from 0.08 to 0.17 cm/year and from 0.3 to 2.6%, respectively. Approximately 70% of the trees were used for model development and 30% for model evaluation. After evaluating the model, all 29,773 trees were used to fit the final model. A generalized logistic model was used to relate mortality to tree size, competition, and relative position of trees in a stand. The evaluation test demonstrated that the model appears to be well behaved and robust for the tree species considered in this study. For the eight tree species, the average deviation between observed and predicted annual mortality rates varied from −0.5 to 0.7% in the test data. West. J. Appl. For. 20(2):101–109.

scholarly journals Plant communities and landscapes of the Parque Nacional de Zinave, Mozambique

Koedoe ◽  
2010 ◽  
Vol 52 (1) ◽  
Author(s):  
Marc Stalmans ◽  
Mike Peel
Keyword(s):  
National Parks ◽  
Plant Communities ◽  
Visual Assessment ◽  
Management Plan ◽  
Individual Plant ◽  
Conservation Area ◽  
Illegal Hunting ◽  
Landsat Satellite ◽  
Recent Initiative ◽  
Landscape Map

The Parque Nacional de Zinave covers 400 000 ha in Mozambique to the south of the Save River. Until recently, this park had been characterised by neglect and illegal hunting that caused the demise of most of its large wildlife. A recent initiative has been launched that aims at rehabilitating the park within the scope of the Greater Limpopo Transfrontier Park (GLTP). A vegetation map was required as input to its management plan. The three primary objectives of the study were, firstly, to understand the environmental and biotic determinants of the vegetation, secondly, to identify and describe individual plant communities in terms of species composition and structure along the roads in the study area and, thirdly, to delineate landscapes in terms of their plant community make-up, environmental as well as biotic determinants and distribution. This is the third survey and description of the landscapes of the national parks located in the Mozambique part of the GLTP. A combination of feldwork and analysis of LANDSAT satellite imagery was used. A total of 75 sample plots were surveyed. A brief subjective visual assessment was undertaken for another 114 sample points. The accuracy of the landscape map was evaluated by means of 582 points assessed during an aerial game count. The ordination results clearly indicate the overriding importance of moisture availability in determining vegetation composition. Ten distinct plant communities were recognised. Different combinations of these plant communities can be grouped in six major landscapes, namely the Save River channel and river banks, Save riverine forest, Acacia nigrescens woodland landscape, mopane landscape, miombo landscape and sandveld landscape. The landscapes with their individual plant communities represent habitats that are highly suitable for the reintroduction of many game species that were lost during the latter part of the last century. Conservation implication: No formal description and mapping of the vegetation existed for Zinave. The landscape map is a vital input for the management plan. The reintroduction of wildlife species that were exterminated during the civil war requires a selection of suitable habitats for the placement of the ‘sanctuary’ that will be used to ensure the initial security of the introduced animals. The landscape map of Zinave fits into the broader mapping of the Great Limpopo Transfrontier Park and Conservation Area (GLTFCA) for conservation planning purposes.

An individual tree diameter increment model for white spruce in Alberta

1995 ◽  
Vol 25 (9) ◽  
pp. 1455-1465 ◽  
Author(s):  
Shongming Huang ◽  
Stephen J. Titus
Keyword(s):  
White Spruce ◽  
Model Parameters ◽  
Data Set ◽  
Individual Tree ◽  
Error Structure ◽  
Permanent Sample Plots ◽  
Tree Diameter ◽  
Diameter Increment ◽  
Diameter Increment Model ◽  
Age Independent

Based on a data set from 164 permanent sample plots, an age-independent individual tree diameter increment model is presented for white spruce (Piceaglauca (Moench) Voss) grown in the boreal mixed-species stands in Alberta. The model is age independent in that it does not explicitly require tree or stand age as input variables. Periodic diameter increment is modelled as a function of tree diameter at breast height, total tree height, relative competitiveness of the tree in the stand, species composition, stand density, and site productivity. Because data from permanent sample plots are considered time series and cross sectional, diagnostic techniques were applied to identify the model's error structure. Appropriate fit based on the identified error structure was accomplished using weighted nonlinear least squares with a first-order autoregressive process. Results show that (1) all model parameters are significant at α = 0.05 level, and (2) the plot of studentized residuals against predicted diameter increment shows no consistent underestimate or overestimate for diameter increment. The model was also tested on an independent data set representing the population on which it is to be used. Results show that the average prediction biases are not significant at α = 0.05 level, indicating that the model appropriately describes the data and performs well when predictions are made.

scholarly journals OPPORTUNITIES AND CHALLENGES FOR TOURISM DEVELOPMENT IN THE NUSA TENGGARA TIMUR REGION (NTT)

2019 ◽  
Vol 15 (2) ◽  
pp. 155-162
Author(s):  
Luh Putu Sudini
Keyword(s):  
National Parks ◽  
Water Conservation ◽  
Marine Conservation ◽  
Environmental Conservation ◽  
Marine Waters ◽  
Conservation Areas ◽  
Conservation Area ◽  
Travel And Tourism ◽  
Tourism Sector ◽  
Tourism Potential

Besides the tourism sector can increase economic growth, it also does not damage the environment and even stimulates environmental conservation. The tourism sector has become a global trend in the past three decades. World Travel and Tourism Council (WTTC) in 1998. Problems: 1) What is the urgency of tourism in the NTT region? And 2) How do you deal with the challenges of developing tourism in the NTT region? This research is empirical legal research. The urgency of tourism in the NTT region, among others: paying attention to tourism in the province of East Nusa Tenggara (NTT), which has the character of an archipelago, most of which consists of marine waters and is still lagging behind, it seems that the urgency of tourism in NTT is dominated by sea tourism or nature, such as national parks, Marine Conservation Areas, and Nature Parks (TWA). This is evident through the existence of 8 (eight) marine waters conservation areas owned by NTT Province. In addition, NTT Province also has a lot of potential in the marine sector, such as marine resources for capture and aquaculture; the potential for seaweed cultivation; potential of salt resources; and the potential for pearl cultivation, all of the marine potential is very supportive and influences the urgency of tourism for the East Nusa Tenggara (NTT) Province. Efforts that can be made in order to deal with these challenges include: first, make improvements in the infrastructure sector, for example there is good coordination between the central and regional governments and cities in the NTT Province with regard to policies on water conservation area management or marine tourism in East Nusa Tenggara (NTT); second, maximizing the tourism potential in NTT through professional human resource de-velopment, improved tourism management facilities and third, online tourism publications optimized so that tourists are interested in traveling to the NTT Province; and in addition, supervise/control the applicable laws and regulations in ALKI that cross the sea waters, so that the existence of the ALKI does not interfere with the conservation of waters in the Sawu Sea.

Estimating tourism’s contribution to conservation area financing in Mozambique

2016 ◽  
Vol 17 (1) ◽  
pp. 24-33 ◽  
Author(s):  
Andrew Rylance
Keyword(s):  
National Parks ◽  
Developed Countries ◽  
Current Status ◽  
Area Network ◽  
Least Developed Countries ◽  
Conservation Areas ◽  
Conservation Area ◽  
Total Contribution ◽  
Revenue Generation ◽  
Area Management

Financial sustainability of conservation areas is one of the cornerstones for enabling effective conservation management. However, the current status of conservation area funding is widely detached from the need, and this disparity is intensified in developing countries. Therefore, identifying and valuing the revenue streams and finance needs of conservation areas is an important step in the process to become financial sustainable. This paper assesses the revenue potential of conservation areas in Mozambique national parks and reserves. The analysis describes the revenue generation of 93 conservation areas in Mozambique in 2013 to (i) the economy, (ii) the Government of Mozambique and conservation area management authorities, as well as (iii) respective communities bordering conservation areas. The analysis determined that the total annual revenue generation within the conservation area network was USD 24.4 million in 2013 from tourism-linked activities. The component of total revenue that accrued to either national Government of Mozambique or conservation area management was USD 3.33 million in 2013, and USD 606,500 of this accrued to communities surrounding conservation areas. The research has demonstrated that revenue generation of the conservation area network contributes approximately 10% to the tourism sector’s total contribution to the economy of Mozambique. In addition, this research highlights the difficulties of revenue generation from conservation areas in least developed countries and the effects of a lack of data on justifying the value of a conservation area network from an economic perspective.

scholarly journals Landscape Connectivity Analysis and Optimization of Qianjiangyuan National Park, Zhejiang Province, China

2021 ◽  
Vol 13 (11) ◽  
pp. 5944
Author(s):  
Yangjing Peng ◽  
Minghao Meng ◽  
Zhihao Huang ◽  
Ruifeng Wang ◽  
Guofa Cui
Keyword(s):  
Protected Areas ◽  
National Parks ◽  
National Park ◽  
Landscape Connectivity ◽  
Gravity Modeling ◽  
Natural Ecosystems ◽  
Conservation Area ◽  
Habitat Patches ◽  
Functional Zoning ◽  
Ecological Conservation

As natural ecosystems in most parts of the world come under increasing human influence, fragmentation is becoming the major driving factor of the global biodiversity crisis. Therefore, connectivity between habitat patches is becoming even more important. China began building national parks with the primary purpose of protecting nationally representative natural ecosystems and maintaining the integrity of their structure, processes and functions. Research is necessary to improve the internal connectivity of national parks and to propose suggestions for existing functional zoning and biological corridors. In this study, Qianjiangyuan National Park was selected as an example park, and landscape fragmentation was evaluated exponentially and simulated visually. The habitat characteristics of protected species in the region, morphological spatial pattern analysis and the delta of the probability of connectivity were used together to identify key habitat patches and their importance levels in the study area. Potential habitat corridors in the region were then obtained using least-cost path analysis and gravity modeling methods based on the distribution of key habitat and the migration costs of target species. The results of this study show that the disturbed landscape of the study area is dominated by tea plantations and drylands, with central roads being an important factor affecting the overall landscape connectivity. In terms of the distribution of key habitat patches, the mountains have a high value. In terms of area, their size is not directly proportional to their importance for maintaining landscape connectivity in the region, but large area patches are generally of higher importance. In terms of distance, key habitats that are closer to each other have a stronger correlation and a greater possibility for species migration. Combined with the functional zoning of Qianjiangyuan National Park, the setting of strictly protected areas and recreational areas is reasonable, and traditional use areas and ecological conservation areas could be appropriately adjusted according to the distribution of key habitats. The important corridor in the middle of the ecological conservation area is crucial for the overall connectivity of the national park, and the connectivity between strict protected areas will depend on successful protection of the ecological conservation area.

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