NATURAL REGENERATION AND ARTIFICIAL THINNING FOR EARLY FOREST RESTORATION ON A PERMANENTLY CLOSED SKI SLOPE

2021 ◽  
Vol 20 (82) ◽  
Author(s):  
Tetsuoh Shirota
Keyword(s):  
Natural Regeneration ◽  
Forest Restoration

scholarly journals Natural Regeneration After Gold Mining in the Peruvian Amazon: Implications for Restoration of Tropical Forests

2021 ◽  
Vol 4 ◽  
Author(s):  
Roger Chambi-Legoas ◽  
Daigard Ricardo Ortega Rodriguez ◽  
Francisco de Marques de Figueiredo ◽  
Joel Peña Valdeiglesias ◽  
Percy Amílcar Zevallos Pollito ◽  
...  
Keyword(s):  
Tropical Forests ◽  
Natural Regeneration ◽  
Forest Restoration ◽  
Gold Mining ◽  
Forest Recovery ◽  
Regeneration Process ◽  
Peruvian Amazon ◽  
Secondary Species ◽  
Number Of Species ◽  
Madre De Dios

Context: Gold mining is the most destructive activity in the natural forests of the Madre de Dios region in the southeastern Peruvian Amazon. Understanding the natural regeneration process of these degraded areas is necessary to develop forest restoration projects in such conditions.Aims: We aimed to evaluate forest recovery and identify the successional and structure patterns of vegetation governing natural regeneration over time.Methods: Structure, composition, richness, diversity, and successional status were evaluated in abandoned artisanal gold mine areas in Madre de Dios, southeastern Peru. Vegetation data were recorded in 61 plots of 250 m2 established in five sites varying from 1 to 19 years of abandonment. Vegetation in abandoned areas was compared with six undisturbed forests evaluated in previous inventories.Results: In the mining lands, tree density and basal area recovered quickly, while species richness and composition were slow. Forest recovery is an initial stage of transition from pioneer to early secondary species until at least 19 years after abandonment. The most abundant and frequent species were the fast-growing species Ochroma pyramidale and Cecropia engleriana. These species could be considered potential candidates to promote restoration plans. Pioneer species represented 63% of the number of species in plots of 1–4 years, 57% in plots of 5–7 years, and 50% in plots of 8–19 years. Early and late secondary species represented 34 and 16%, respectively, of the number of species in plots of 8–19 years. Abandoned mining and reference plots present less than 5% of species in common.Conclusion: Our results highlight a slow natural regeneration process in areas for up to 19 years after gold mining. Species from different successional statuses were identified as potential candidates for recovering vegetation in such areas. Our findings may have important implications for further research focusing on the ecological restoration in tropical forests severely degraded by gold mining.

scholarly journals Demographic costs and benefits of natural regeneration during tropical forest restoration

2018 ◽  
Vol 22 (1) ◽  
pp. 34-44 ◽  
Author(s):  
T. Trevor Caughlin ◽  
Marinés Peña‐Domene ◽  
Cristina Martínez‐Garza
Keyword(s):  
Tropical Forest ◽  
Natural Regeneration ◽  
Forest Restoration ◽  
Costs And Benefits ◽  
Tropical Forest Restoration

scholarly journals USING BARE-ROOT AND ROOTSTOCK SEEDLINGS FROM NATURAL REGENERATION OF CEDRELA FISSILIS

CERNE ◽  
2016 ◽  
Vol 22 (3) ◽  
pp. 309-316
Author(s):  
Thomas Schroder ◽  
Anna Paula Lora Zimmermann ◽  
Lílian Daniel Pereira ◽  
Noé dos Santos Ananias Hofiço ◽  
Dilson Sousa Rocha Júnior ◽  
...  
Keyword(s):  
Survival Probability ◽  
Natural Regeneration ◽  
Forest Restoration ◽  
Linear Models ◽  
Water Stress Tolerance ◽  
Cheap Alternative ◽  
Collar Diameter ◽  
Survival And Growth ◽  
Bare Root ◽  
One Year

ABSTRACT The success of forest creation relies on seedling availability and quality. The aim of this research is to assess the possible use of rootstock and bare-root seedlings of Cedrela fissilis obtained from natural regeneration for direct field planting. We used Generalized Linear models to assess survival and Hierarchical Models to assess height growth over one year after planting. Initial root-collar diameter (RCD) and treatment (rootstock or bare-root) affected survival and growth. Rootstock and larger seedlings presented higher levels of survival and growth. Higher seedling quality in the rootstock treatment is due to higher water stress tolerance. Rootstock seedlings with more than 1 cm of initial RCD had over 80% of survival probability, while small bare-root seedlings had mean survival probability as low as 20%. Rootstock seedlings grew as much as fourfold more than bare-root. Using natural regeneration of C. fissilis as a source of rootstock seedlings may be a cheap alternative for forest restoration and enrichment planting projects.

scholarly journals TO THE PROBLEM OF LARCH WOODS SUSTAINABILITY IN THE CONDITIONS OF THE REPUBLIC OF TATARSTAN

2018 ◽  
Vol 13 (3) ◽  
pp. 60-64
Author(s):  
Шамиль Шайхразиев ◽  
Shamil Shaykhraziev ◽  
Айгуль Мухаметшина ◽  
Aygul' Muhametshina ◽  
Сергей Глушко ◽  
...  
Keyword(s):  
Natural Regeneration ◽  
Forest Restoration ◽  
Deciduous Forest ◽  
Eastern Region ◽  
Forest Zone ◽  
Broad Leaved Forest ◽  
Larch Forests ◽  
European Part Of Russia ◽  
The Republic ◽  
The Stability

On the territory of the Republic of Tatarstan grow larch forests of artificial origin. The area of larch stands in the forest fund of Tatarstan reached five thousand hectares. To assess the prospects for the introduction of larch forests in the region, the work on determining their sustainability began. The sustainability of forests is related to the success of their reforestation. The success of forest restoration depends to a large extent on the indicators of natural regeneration of the forest. The territory of the Republic of Tatarstan in the coniferous-broad-leaved forest zone contains fragments of taiga vegetation. In some areas, successful natural regeneration of larch has been identified here. Young larches, marked by us, allow us to establish the possibility of sustainable development of larch forests under the conditions of the northern part of the Republic of Tatarstan. An example of the location of larch forests in the Far Eastern region allows one to make an assumption about the high fragmentation of larch forests in the southern part of their range and the ability of this forest-forming species to grow in the coniferous-deciduous forest zone. For the European part of Russia, in the Republic of Tatarstan, fragments of taiga vegetation can be represented by stable conditionally native larch forests. It is proposed to take into account the stability of larch forests in the planning of larch cultivation in the Republic of Tatarstan.

scholarly journals Effects of forest restoration techniques on community diversity and aboveground biomass on area affected by mining tailings in Mariana, Southeastern Brazil

2021 ◽  
Vol 2 (4) ◽  
Author(s):  
Ítalo Favoreto Campanharo ◽  
Sebastião Venâncio Martins ◽  
Pedro Manuel Villa ◽  
Gabriel Correa Kruschewsky ◽  
Andreia Aparecida Dias ◽  
...  
Keyword(s):  
Aboveground Biomass ◽  
Natural Regeneration ◽  
Forest Restoration ◽  
Community Diversity ◽  
Southeastern Brazil ◽  
Tree Seedlings ◽  
Active Restoration ◽  
Substrate Properties ◽  
Restoration Method ◽  
Ecological Dominance

Currently there is an urgent and special attention in actions to restore tropical forests. In this study, we evaluated the effect of different restoration methods on aboveground biomass (AGB) stock, tree community diversity and structure, in areas affected by the Fundão tailings dam collapse in Mariana, Minas Gerais state, Brazil. We measured and compiled data of the AGB, community diversity and structure attributes in 36 plots distributed in six restoration treatments and six replicas: planting of native tree seedlings with fertilization and pH correction (PSf) and without fertilization and pH correction (PS); seeding of native trees with fertilization and pH correction (SDf) and without fertilization and pH correction (SD); natural regeneration with fertilization and pH correction (NRf) and without fertilization and pH correction (NR). No significant differences in substrate properties and AGB between treatments. Although biomass storage between treatments was not statistically different, there is a clear pattern showing higher values active restoration method. The Pielou index ranged from 0.520 (SDf) to 0.943 (NR), except for SDf all the others treatments had values higher than 0.76. This result suggests floristic heterogeneity, without ecological dominance in the plant community. Overall, active restoration had important implications for the forest restoration where natural regeneration is limited.

scholarly journals SURVIVAL AND NATURAL REGENERATION OF FOREST ESSENCES CULTIVATED IN ALTERED AREAS THIRTY-FIVE YEARS AFTER PLANTING

FLORESTA ◽  
2022 ◽  
Vol 52 (1) ◽  
pp. 168
Author(s):  
Harley Araújo da Silva ◽  
Thiago Augusto Da Cunha ◽  
Veronica Telma Da Rocha Passos
Keyword(s):  
Tree Species ◽  
Natural Regeneration ◽  
Forest Restoration ◽  
Mangifera Indica ◽  
Survival Rates ◽  
The State ◽  
High Survival ◽  
Syzygium Cumini ◽  
Forest Species ◽  
Survival Status

The evaluation of the survival and natural regeneration of tree species in a 35-year-old plantation was carried out to identify the species established in the area, aiming at their recommendation in forest restoration plantations in the State of Acre. In the 1980s, 138 forest species were planted in two experimental units (EU), of 1.38 ha each, in the Zoobotanical Park (ZP) of the Federal University of Acre, Rio Branco campus. The main activities carried out in the area, prior to planting, were agriculture and cattle raising.  Survival status was measured through a census of all individuals planted at the time, who were still alive. In addition, all regenerating individuals from planted species were surveyed in the effective planting area of the experimental units. At the time of evaluation, living individuals of 41 and 46 species were found in experimental units 1 (EU-1) and 2 (EU-2), respectively. The species Syagrus sancona, Talisia esculenta, Acacia polyphylla, Couepia bracteosa, Mangifera indica, Syzygium cumini and Copaifera multijuga showed survival rates above 90% in at least one of the experimental units. Only Syagrus sancona and Handroanthus serratifolius presented high survival rates in both experimental. Regenerating individuals of the species Aspidosperma vargasii, Couepia bracteosa, Euterpe precatoria, Handroanthus serratifolius, Oenocarpus mapora, Onychopetalum periquino and Stryphnodendron pulcherrimum were found in the two EU.

scholarly journals Soil seed banks in two environments of forest restoration post bauxite mining: native tree plantation and natural regeneration

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Sebastião Venâncio Martins ◽  
Wesley da Silva Fonseca ◽  
Luiz Henrique Elias Cosimo ◽  
Diego Balestrin
Keyword(s):  
Natural Regeneration ◽  
Forest Restoration ◽  
Soil Seed Bank ◽  
High Similarity ◽  
Tree Plantation ◽  
Bauxite Mining ◽  
Soil Seed Banks ◽  
Three Samples ◽  
Minas Gerais State ◽  
Ecological Dominance

The objective of this study was to compare the soil seed bank of an area under natural regeneration (F1) and another reforested through seedling planting (F2), seven years after bauxite mining, in Minas Gerais State, Brazil. In each area, 10 sampling points were randomly distributed, using three samples of topsoil to represent each point. The samples were transported to a shade house and evaluated for six months, where emerging individuals were identified every two weeks. In F1, 2,114.94 propagules m-2 were registered, belonging to 51 species and 24 botanical families, H’=2.770 e J’=0.705. In F2, 1,168.62 propagules m-2 were registered, belonging to 42 species and 22 families, H’=2.618 and J’=0.700. The Jaccard index between F1 and F2 was 0.61, indicating a high similarity between the analyzed areas. The results showed high density of propagules, good diversity and absence of ecological dominance. The high similarity between forests is related to geographical proximity, the same topsoil origin (agricultural/pasture) and also to the role of the dispersing fauna. The high number of individuals and diversity of tree species with zoochoric dispersion found in the areas indicate that both natural regeneration and reforestation were efficient in the ecological restoration of bauxite mined areas. 

scholarly journals Effectiveness of two treatments to promote tree regeneration: implications for forest restoration in the Isla del Coco National Park, Costa Rica

2020 ◽  
Vol 68 (S1) ◽  
pp. S103-S114
Author(s):  
Luis Acosta-Vargas ◽  
Adriana E. Rovere ◽  
Jorge Camacho-Sandoval
Keyword(s):  
Tree Species ◽  
Natural Regeneration ◽  
Forest Restoration ◽  
National Park ◽  
Negative Impact ◽  
Forest Degradation ◽  
Tree Regeneration ◽  
Native Forest ◽  
Ecological Processes ◽  
Seed Dispersion

Introduction: Isla del Coco is the only island in the Eastern Tropical Pacific with humid tropical forests; 296 plant species are reported, of them, 22% are endemic. Their ecology is poorly understood. Deforestation and the introduction of rats, feral pigs and white-tailed deer are the primary agents of forest degradation. After more than 120 years, the deforested areas have never recovered the native forest. Objective: To analyse if the deforested area keeps its resilience, we evaluated the natural regeneration and ecological processes associated. Methods: From August 2016 to June 2018, we conducted a restoration experiment consisting of a randomized complete blocks design including vegetation cutting, vegetation uprooting and controls as treatments. Plots were protected with an exclusion fence to avoid herbivores. Results: There were no differences between plant cutting and uprooting in stimulating natural regeneration. We only recorded the seedlings of two tree species, 35 individuals of Cecropia pittieri and three of Sacoglottis holdridgei, both endemic. Their regeneration established during the first 15 months mainly. At the end of the experiment, the structure and composition of the vegetation changed from bushes dominated by Entada gigas (28%) and Clidemia strigillosa (12%) to grasses dominated by Paspalum conjugatum (39%). Entada gigas has a high recolonizing potential with a growing rate of 1.6±0.2m/month. Conclusions: As filters for restoration we determined herbivores, which pose a strong negative impact in the development of the forest; the exhausted seed bank of tree species and scarce or null seed dispersion.

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