scholarly journals Study of recovery rates of natural forest stands after logging in East Kalimantan

2020 ◽  
Vol 533 ◽  
pp. 012015
Author(s):  
F H Susanty
Keyword(s):  
Natural Forest ◽  
Forest Stands ◽  
Recovery Rates ◽  
East Kalimantan

A Method to Measure Radial Incremenf in Tropical Trees

IAWA Journal ◽  
1989 ◽  
Vol 10 (2) ◽  
pp. 147-154 ◽  
Author(s):  
Takayoshi Shiokura
Keyword(s):  
Tropical Trees ◽  
Natural Forest ◽  
Radial Increment ◽  
Forest Trees ◽  
Breast Height ◽  
East Kalimantan ◽  
Iriomote Island ◽  
Mangrove Trees

Radial increment was studied in natural forest trees in East Kalimantan, Indonesia, and in mangrove trees in Thailand and on Iriomote Island (Japan). Nails were driven into the trunk at breast height. Barrier zones fonned in response were located after felling of the tree, and the amount of wood fonned subsequent to nailing was measured. Thanks to the distinctness of the cambial response to nailing, this method appears very effective for measuring radial increment in tropical trees. The following results were obtained:

Detection and Quantification of Coarse Woody Debris in Natural Forest Stands Using Airborne LiDAR

2021 ◽  
Author(s):  
Lukas R Jarron ◽  
Nicholas C Coops ◽  
William H MacKenzie ◽  
Pamela Dykstra
Keyword(s):  
Coarse Woody Debris ◽  
Laser Scanning ◽  
Stand Structure ◽  
Woody Debris ◽  
Large Diameter ◽  
Natural Forest ◽  
Wildlife Habitat ◽  
Airborne Lidar ◽  
Forest Stands ◽  
Linear Pattern

Abstract Coarse woody debris (CWD) is a meaningful contributor to forest carbon cycles, wildlife habitat, and biodiversity and can influence wildfire behavior. Using airborne laser scanning (ALS), we map CWD across a range of natural forest stand types in north-central British Columbia, Canada, providing forest managers with spatially detailed information on the presence and volume of ground-level woody biomass. We describe a novel methodology that isolates CWD returns from large diameter logs (>30cm) using a refined grounding algorithm, a mixture of height and pulse-based filters and linear pattern recognition, to transform ALS returns into measurable, vectorized shapes. We then assess the accuracy of CWD detection at the individual log level and predict CWD volume at the plot level. We detected 64% of CWD logs and 79% of CWD volume within our plots. Increased elevation of CWD significantly aided detection (P = 0.04), whereas advanced stages of decay hindered detection (P = 0.04). ALS-predicted CWD volume totals were compared against field-measured CWD and displayed a strong correlation (R = 0.81), allowing us to expand the methodology to map CWD over a larger region. The expanded CWD volume map compared ALS volume predictions between stands and suggests greater volume in stands with older and more heterogeneous stand structure. Study Implications A methodology is presented to extract returns associated with large diameter coarse woody debris (CWD) directly from an ALS point cloud. These returns are transformed into measurable shapes and their volume estimated based on the height of the returns. The procedure is implemented over a large forested area to produce a map of local CWD volume. Production of these maps can be used to generate inventory of CWD over a range of natural forest stands to support a more well-rounded understanding of carbon levels associated with downed trees, wildlife habitat attributes, and fuel loading in the terrestrial biosphere.

Study of varieties and diversity of walnut forms in Kyrgyzstan (reviewed paper)

2006 ◽  
Vol 157 (11) ◽  
pp. 499-506 ◽  
Author(s):  
Davlet Mamadjanov
Keyword(s):  
Juglans Regia ◽  
Natural Forest ◽  
Forest Stands ◽  
Seed Population

The peculiarity of Kyrgyzstan's walnut-fruit forests(Juglans regia L.) consists of a huge diversity of forms of walnut. The walnut selection has a long history in this country,and the selection out of natural seed population is still practiced. The author describes the selection goal, criteria and results of promising forms of walnut out of trial collection plots as well as in natural forest stands.

scholarly journals STRUKTUR DAN KOMPOSISI VEGETASI SEBAGAI DASAR RESTORASI DEGRADASI HUTAN DI KAWASAN PERLINDUNGAN BLOK SINTANG PT FINNANTARA INTIGA

2021 ◽  
Vol 11 (2) ◽  
Author(s):  
Edi Rustadi Setiadharma ◽  
Burhanuddin Burhanuddin ◽  
M Sofwan Anwari
Keyword(s):  
Forest Restoration ◽  
Forest Ecosystems ◽  
Similarity Index ◽  
Natural Forest ◽  
Survey Method ◽  
Community Similarity ◽  
Forest Stands ◽  
Horizontal Structure ◽  
Purposive Sampling ◽  
Open Land

This study aims to examine the composition and structure of the vegetation in the protected forest area of PT Finnantara Intiga's Sintang block and determine the pattern of forest restoration and the types of vegetation that will be used for restoration of degraded forests. This research was conducted at PT Finnantara Intiga Sintang Block which is located in five land cover areas, of which three are reference secondary swamp forest (KPPN, KPSL and river border) and two areas are degraded forest (shrub and open land). This study uses a survey method with a line plot system. The sample was determined by means of purposive sampling. Based on the results of research data analysis, the number of species found at all levels at the KPSL location was nine species, at the KPPN location there were eleven species, at the River Border location there were eight species, at the Semak Belukar location there were seven species and at the Open Land location there were four species. In general, the horizontal structure of forest stands in damaged forest ecosystems is below the horizontal structure of natural forest stands as a reference. This shows that the level of vegetation density at the location of shrubs and open land has decreased so that forest restoration measures are needed to increase the density closer to natural forest ecosystems that have not been damaged. The pattern of forest restoration for scrub areas and open land referring to the Guidelines for Restoration in Conservation Areas (JICA, 2014) is natural succession. The pattern of forest restoration that will be implemented must take into account the physical conditions of the field and local socio-cultural considerations based on stakeholder considerations. The type of vegetation for enrichment and planting activities at the shrub location refers to the KPSL location as a reference because it tends to have similarities with the community similarity index of 52.03%. The type of vegetation for enrichment and planting activities on open land locations refers to the KPPN location as a reference because it tends to have similarities with the community similarity index of 52.17%. Keywords:  Composition, forest degradation, restoration, structureAbstrakPenelitian ini bertujuan untuk mengkaji komposisi dan struktur vegetasi di kawasan hutan perlindungan blok Sintang PT Finnantara Intiga serta menentukan pola pemulihan hutan dan jenis vegetasi yang akan digunakan untuk restorasi hutan terdegradasi. Penelitian ini dilaksanakan di PT Finnantara Intiga Blok Sintang yang terletak di lima areal tutupan lahan, dimana tiga areal sebagai hutan rawa sekunder referensi (KPPN, KPSL dan sempadan sungai) dan dua areal di hutan yang terdegradasi (semak belukar dan lahan terbuka). Penelitian ini menggunakan metode survey dengan cara jalur berpetak. Sampel ditentukan dengan cara Purposive Sampling. Berdasarkan hasil analisis data penelitian, Jumlah jenis yang ditemui di semua tingkatan di lokasi KPSL ada sembilan jenis, dilokasi KPPN ada sebelas jenis, di lokasi Sempadan Sungai ada delapan jenis, di lokasi Semak Belukar ada tujuh jenis dan di lokasi Lahan Terbuka ada empat jenis. Secara umum bentuk grafik struktur horizontal tegakan hutan pada ekosistem hutan yang mengalami kerusakan berada di bawah grafik struktur horizontal tegakan hutan alam yang menjadi referensi. Hal ini menunjukkan bahwa tingkat kerapatan vegetasi pada lokasi semak belukar dan lahan terbuka mengalami penurunan sehingga diperlukan tindakan pemulihan hutan untuk meningkatkan kerapatan mendekati ekosistem hutan alam yang belum mengalami kerusakan. Pola pemulihan hutan untuk areal semak belukar dan lahan terbuka merujuk pada Pedoman Tata Cara Restorasi di Kawasan Konservasi (JICA, 2014) adalah suksesi alami. Pola pemulihan hutan yang akan dilaksanakan harus mempertimbangkan kondisi fisik lapangan dan sosial budaya setempat berdasarkan pertimbangan stakeholder. Jenis vegetasi untuk kegiatan pengkayaan dan penanaman pada lokasi semak belukar mengacu pada lokasi KPSL sebagai referensi karena kecenderungan memiliki kemiripan dengan dengan indeks kesamaan komunitas sebesar 52,03%. Jenis vegetasi untuk kegiatan pengkayaan dan penanaman pada lokasi lahan terbuka mengacu pada lokasi KPPN sebagai referensi karena kecenderungan memiliki kemiripan dengan dengan indeks kesamaan komunitas sebesar 52,17%.Kata kunci: Degradasi hutan, komposisi, restorasi, struktur

scholarly journals Composition of psocid taxocenoses (Insecta: Psocoptera) in dependence on the level of naturalness of forest ecosystems in the Žďárské vrchy hills

2012 ◽  
Vol 49 (No. 5) ◽  
pp. 208-219 ◽  
Author(s):  
P. Mückstein ◽  
O. Holuša
Keyword(s):  
Picea Abies ◽  
Fagus Sylvatica ◽  
Cultural Landscape ◽  
Forest Ecosystems ◽  
Abies Alba ◽  
Natural Forest ◽  
Acer Pseudoplatanus ◽  
Forest Stands ◽  
Different Types ◽  
Grazing Lands

In 1999–2000 in the Protected Landscape Area (PLA) Žďárské vrchy hills the occurrence of psocids (Psocoptera) was studied in different types of biotopes: natural forest ecosystems (stands of Fagus sylvatica with individual admixture of Abies alba, Acer pseudoplatanus, Picea abies), changed forest ecosystems (monoculture of Picea abies), young plantations in forest stands, disperse forest vegetation (solitary trees), and also non-forest ecosystems – agrocenoses, meadows and grazing lands. A total of 10,560 adults in 20 species were found. Three groups of biotopes with specific psocid taxocenosis were found out by computed cluster analysis – l. natural forest stands with dominance of Fagus sylvatica, 2. disperse tree vegetation and solitary trees in cultural landscape, and 3. forest stands remote to nature (monoculture of Picea abies). Occurrence of psocids was observed from the beginning of May to mid- November. Maximum of abundance was found in September.

scholarly journals Taxocenoses of psocids (Insecta: Psocoptera) in the forest ecosystems of Babia hora Mt. and Pilsko Mt. in the Oravské Beskydy Mts. (Slovakia)

2012 ◽  
Vol 60 (6) ◽  
pp. 117-128 ◽  
Author(s):  
Otakar Holuša
Keyword(s):  
Cluster Analysis ◽  
Forest Ecosystems ◽  
Natural Forest ◽  
Western Carpathians ◽  
Forest Stands ◽  
Vegetation Zones ◽  
Species Combination ◽  
Characteristic Species ◽  
Natural Reserves

In the Oravské Beskydy Mts. in the National Natural Reserves of Babia hora Mt. and Pilsko Mt. (northern Slovakia) are natural forest and near-natural forest stands in 8th (Piceeta s. lat. =Spruce) and in 9th (Pineta mugo s. lat. = dwarf pine) vegetation tiers (= altitudinal vegetation zones) (vegetation tiers according Plíva 1971, 1991, Holuša and Holuša 2008, 2010, 2011). During 1999–2000, psocids (Psocoptera) were studied from 6th to 9th vegetation tiers. In total, 1,113 adults and 42 larvae in 17 species were found. In 6th VT, 11 species were found (the following species were eudominant: Caecilius burmeisteri, Philotarsus picicornis and Caecilius flavidus), in 7th VT only 4 species (eudominant Philotarsus picicornis, Caecilius despaxi and Philotarsus picicornis), in 8th VT 10 species (eudominant Stenopsocus lachlani, Caecilius despaxi and C. burmeisteri) and in 9th VT 10 species (eudominant Caecilius burmeisteri, Lachesilla pedicularia and Stenopsocus lachlani). Taxocenoses of psocids in the Oravské Beskydy Mts. were evaluated by Detrend Corespondence analysis (DCA) and Divisive Cluster analysis (DvClA). Material was compared with other material from various vegetation tiers in the Western Carpathians Mts. Characteristic species combination of psocids of 9th VT was designated as follows: Lachesilla pedicularia – Caecilius despaxi – Stenopsocus lachlani.

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