Trees, Forests and People最新文献

{"title":"Disentangling research on oak decline factors in Mediterranean-type climate regions: A systematic review","authors":"Marco Marques,&nbsp;Miguel N. Bugalho,&nbsp;Vanda Acácio,&nbsp;Filipe X. Catry","doi":"10.1016/j.tfp.2025.100803","DOIUrl":"10.1016/j.tfp.2025.100803","url":null,"abstract":"<div><div>The genus <em>Quercus</em> holds significant ecological and economic value in the Northern Hemisphere Mediterranean-type climate (MTC) regions. However, <em>Quercus</em> species and ecosystems are threatened by decline. Despite the importance of this genus, a comprehensive analysis of the causes of oak decline across these regions is still lacking. This study maps and analyzes research on oak decline in MTC regions, examining causal factors and <em>Quercus</em> species studied, while identifying knowledge gaps and future research priorities. We systematically reviewed 241 peer-reviewed articles on oak decline in MTC regions up to 2022, retrieved from the Web of Science and Scopus databases.</div><div>Our findings show that scientific articles on oak decline began to be published in 1981 and peaked in 2021. Most studies focused on the Mediterranean Basin, with disparities between Northern Africa and Southern Europe. The most frequently studied species were <em>Quercus suber</em> L. and <em>Quercus ilex</em> L. in the Mediterranean Basin, and <em>Quercus agrifolia</em> Née and <em>Quercus kelloggii</em> Newb. in California, comprising 53% of all species mentioned. Pathogens (48%) and climate factors (17%) were identified as the most researched causes of oak decline. Additionally, multiple interactions between factors were identified, confirming that these combinations potentially exacerbate oak decline. Climate factors were the most frequently found in combination with others. Conversely, pathogens were mostly studied in isolation, reflecting their widely recognized role in oak decline.</div><div>The study highlights the potential risk of pathogen and pest transference between MTC regions and the critical role of management practices in influencing oak decline in interaction with biotic and abiotic factors.</div></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":"19 ","pages":"Article 100803"},"PeriodicalIF":2.7,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Jatropha for Galapagos: Targeted approaches to promoting bioenergy are needed given the different practices and objectives of smallholder farmers","authors":"Diana Rade-Loor ,&nbsp;Marianna Siegmund-Schultze ,&nbsp;Francisco Javier Oñate Mancero ,&nbsp;Jhonatan Paul Gamboa-Trujillo ,&nbsp;Álvaro Cañadas-López ,&nbsp;Christian Wehenkel","doi":"10.1016/j.tfp.2025.100801","DOIUrl":"10.1016/j.tfp.2025.100801","url":null,"abstract":"<div><div>The government of Ecuador intends to meet the projected renewable energy needs of the Galapagos Islands with oil from Jatropha. However, the yield of dry seeds from the existing Jatropha plantations appears to be too low to meet this demand. We hypothesize that the local Jatropha production system is not yet sufficiently understood. Knowledge of the smallholders’ agronomic management of Jatropha is fundamental to the development of pro-poor bioenergy. Therefore, the objective was to evaluate the agronomic practices and perspectives of Jatropha producers to provide a baseline for initiating a change in the Jatropha production system. A total of 400 small-scale Jatropha producers of Manabí province were surveyed. The following factors were examined: canton, planting distance, propagation method, harvesting time, harvesting frequency, diseases, other uses, soil type and area available for Jatropha production. Jatropha smallholders have different levels of knowledge and expectations regarding the expansion of plantations. Currently, they mainly use Jatropha as live fences, but productivity is limited by the lack of high-yielding varieties and agronomic knowledge. A significant increase in yield is needed to commercialize the biodiesel obtained. Despite its potential profitability, farmers have been hesitant to expand their plantations due to the uncertainties of the sector. It is essential to develop comprehensive strategies that address these issues and provide incentives and technical support for sustainable expansion. This would not only boost the biodiesel industry, but also contribute to climate change mitigation, and the economic development of agricultural communities, in line with the Galapagos energy transition plan.</div></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":"20 ","pages":"Article 100801"},"PeriodicalIF":2.7,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Local Livelihoods and Determinants of Peatland Protection in Indonesia","authors":"Mohammad Yunus ,&nbsp;Adcharaporn Pagdee ,&nbsp;Himlal Baral","doi":"10.1016/j.tfp.2025.100800","DOIUrl":"10.1016/j.tfp.2025.100800","url":null,"abstract":"<div><div>Peatlands are vital ecosystems for environmental regulation but also support the livelihoods of local people. However, anthropogenic activities are leading to peatland degradation and reduction of ecosystem services. Understanding this complex relationship between people and peatlands is key for effective management. This study investigated how socio-economic conditions influenced local knowledge and practices of peatland protection in the Sungai Kiyap-Sungai Kampar Kiri Peatland Hydrological Unit, Riau Province, Indonesia. Twelve socio-economic factors including demographics, livelihood strategies, and resource accessibility were obtained from local people using a semi-structured questionnaire during May – June 2023. Household knowledge and practices, including valuation of peatland importance, threats, and community participation in protection schemes were measured. Findings showed moderate to high levels of knowledge of peatland characteristics and importance, but a distinct gap between knowledge and practice, especially on sustainable agriculture. Age, education, and training/workshop attendance determined knowledge levels, whereas length of residence and household income influenced peatland protection. Key recommendations to bridge the knowledge-practice gap included dissemination of best management practices, diversifying local-initiative livelihood options, scaling up successful sustainable agriculture, and providing financial incentives. Finally, mutual collaboration and long-term commitment among community groups were essential for information exchange and developing innovative approaches to sustain connectivity between peatlands and people.</div></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":"19 ","pages":"Article 100800"},"PeriodicalIF":2.7,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143436891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The economics of forest restoration: A cost-effectiveness analysis of the leasehold forestry programme in Nepal","authors":"Sony Baral ,&nbsp;Santosh Paudel ,&nbsp;Bijendra Basnyat ,&nbsp;Rajesh K Rai","doi":"10.1016/j.tfp.2025.100785","DOIUrl":"10.1016/j.tfp.2025.100785","url":null,"abstract":"<div><div>In recent decades, Nepal's forest cover has increased significantly, primarily attributable to the community-based forest management approach. The Leasehold Forestry Programme (LFP) has been in place for three decades to reduce poverty. Given that the dynamics of forest ecosystems and socio-economic conditions evolve over time, it becomes imperative to evaluate not just whether the program achieves its original goals, but also whether it contributes to deliver ecological benefits and restoration outcomes in a cost-effective manner. However, the existing literature on cost effectiveness predominantly centres around community forestry. Therefore, this research comprehensively examined the cost-effectiveness of the LFP using a cost benefit analysis, focusing on case studies from Nepal's Gorkha, Tanahun and Nawalpur districts in the Chitwan Annapurna Landscape. For this study, 64 user groups were selected from 921 leasehold forests, using a three-stage cluster sampling technique. A household-level semi-structured questionnaire interview (<em>n</em> = 154 for control forest users and <em>n</em> = 320 for leasehold forest users) was conducted to ascertain the costs and benefits for the beneficiary households. Except for the carbon benefit, which was determined through a field-based biomass survey, we employed the benefit transfer approach for regulatory forest ecosystem services. The results indicate that leasehold forests perform better economically and contribute to the enhancement of user livelihoods compared to control forests. Emphasizing the leasehold programme's goal of ensuring fair access to and distribution of resources, this study underscores the importance of tenure certainty as a crucial factor in attracting prospective tenants and offering security for funding land restoration projects. However, recent modifications of the leasehold forestry tenure limit may impact the programme's future effectiveness.</div></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":"19 ","pages":"Article 100785"},"PeriodicalIF":2.7,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Soil organic carbon drivers in a high-stock forested region","authors":"Mónica Toro-Manríquez ,&nbsp;Alejandro Huertas Herrera ,&nbsp;Soraya Villagrán Chacón ,&nbsp;Anaïs Pourtoy ,&nbsp;Samuel Planté ,&nbsp;Sabina Miguel Maluenda ,&nbsp;Guillermo Martínez Pastur ,&nbsp;Giovanni Daneri","doi":"10.1016/j.tfp.2025.100798","DOIUrl":"10.1016/j.tfp.2025.100798","url":null,"abstract":"<div><div>Forests are pivotal in stocking Soil Organic Carbon (SOC). This study investigated the drivers influencing SOC stock in Chilean Patagonia, a region known for its extensive carbon reserves. We analysed the SOC stock (tons ha⁻¹ at 30 cm depth) as the target variable, considering factors such as forest types (<em>Nothofagus pumilio</em> = NP, <em>N. antarctica</em> = NA, <em>N. dombeyi-N. betuloides</em> = ND-NB, evergreen = EV, and mixed broadleaved forests = MI), soil types (Andosols, Entisols, Inceptisols, and Spodosols), and human impacts (unmanaged = U, burned = B, harvesting = H, livestock = L, and harvesting + livestock = H + L). The analysis combined the SOC stock´s climatic, topographic, and above- and below-ground drivers. Data were evaluated using analyses of variance (ANOVAs), generalised linear models (GLMs), and principal component analyses (PCA). The results revealed significant differences (<em>p</em> &lt; 0.001) in SOC stocks in forest types, soil types, and human impacts. The SOC stocks were higher in EV, NP, and ND-NB forests (SOC &gt;119 tons ha⁻¹) compared to MI and NA forests (SOC ∼100 tons ha⁻¹). The highest SOC stocks were observed in U and H forests (SOC &gt;125 tons ha⁻¹), with Spodosols and Inceptisols showing the highest SOC levels among the soil types. The interaction between NP forests and harvesting presented a high SOC stock. PCAs identified two main groups influencing SOC variation: one related to climatic and topographic factors like seasonal temperatures and altitude and another associated with specific drivers such as pH, canopy cover, decaying wood, vascular plant cover, and lichen cover. We concluded that U and H forests in a region with high SOC stocks maintain equivalent SOC storage. However, special attention is needed for forest management practices involving integrated livestock in harvested forests.</div></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":"19 ","pages":"Article 100798"},"PeriodicalIF":2.7,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Oxygen isotope values of charred tree bark as an indicator of forest fire severity","authors":"Elizabeth McDonald ,&nbsp;Elizabeth A. Webb ,&nbsp;Jeffery P. Dech","doi":"10.1016/j.tfp.2025.100786","DOIUrl":"10.1016/j.tfp.2025.100786","url":null,"abstract":"<div><div>The objective of this study was to determine if oxygen isotope values of charred tree bark could be used to reconstruct fire severity. The study was completed north of River Valley, Ontario, Canada, where a wildfire burned approximately 2500 hectares of white pine (<em>Pinus strobus</em> L.) forest in 2018. We established a network of field plots, collected charred bark samples from standing white pine stems, and estimated burn severity based on a standard field assessment protocol known as the Composite Burn Index (CBI). We also analyzed pre- and post-fire Sentinel-2 imagery of the burn area to compute various Normalized Burn Ratio (NBR)-based change detection algorithms, which are known to produce reliable predictions of CBI. We developed simple linear regression models to predict CBI using either the <em>δ</em>¹⁸O values of charred bark or versions of the NBR. Models developed from the <em>δ</em>18O values of charred bark revealed a significant negative relationship between CBI and plot-level <em>δ</em>¹⁸O, with the strongest relationship being with maximum <em>δ</em>¹⁸O (r² = 0.179, RMSE = 0.565). There were significant positive relationships between all NBR indices and CBI, with better fit statistics than the <em>δ</em>¹⁸O models. The results demonstrate that <em>δ</em>¹⁸O can be used as a predictor of fire severity; however, the scale of measurement of fire severity is finer (tree-level) than the plot-level CBI and NBR indices. The advantage of using the <em>δ</em>¹⁸O method is that it can be used to reconstruct fire severity when satellite or field data are unavailable.</div></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":"20 ","pages":"Article 100786"},"PeriodicalIF":2.7,"publicationDate":"2025-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143547826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of forest fires on vegetation composition and soil properties of Pinus roxburghii forests in the Western Himalaya","authors":"Sneha Dobhal ,&nbsp;Anjali Negi ,&nbsp;Amol Vasishth ,&nbsp;Raj Kumar ,&nbsp;Shubham Thapliyal ,&nbsp;Anubhuti Rai ,&nbsp;Kanika Rana","doi":"10.1016/j.tfp.2025.100794","DOIUrl":"10.1016/j.tfp.2025.100794","url":null,"abstract":"<div><div>Fire is a commom phenomenon in the Western Himalaya, particularly in the <em>Pinus roxburghii</em> (Chir Pine) forests. The frequent incidence of devastating fire events in these forests can result in serious ecological consequences, such as loss of biodiversity, changes in vegetation composition, and alterations in soil properties. Therefore, the current investigation was conducted to assess the impact of wildfires on the composition, species richness, dominance, and diversity of vegetation, as well as soil properties, in the <em>P. roxburghii</em> forests of the Western Himalaya. The findings indicated that the fire led to an increase (p&lt;0.05) in the shrub species. On the contrary, the total number of tree species seedlings and herb species remained unchanged after the fire event. Further, results showed that the two pre-existing shrub species disappeared, and the three new species of shrubs emerged after the fire. Likewise, fire led to the emergence of five new herb species, while five pre-existing herb species disappeared. The overall seedling density of shrubs, herbs, and trees exhibited an increasing (p&lt;0.05) trend in the post-fire scenario. Interestingly, the density and frequency of <em>P. roxburghii</em> trees were almost same both before and after the fire. The density and frequency of <em>Berberis asiatica, Lantana camara,</em> and <em>Rhus parviflora</em> shrubs increased following the fire, while <em>Rubus ellipticus</em> shrub exhibited a declining trend. Furthermore, in the post-fire conditions, the seedling density of <em>P. roxburghii</em> and <em>Myrica esculenta</em> trees increased (p&lt;0.05), while the density of <em>Quercus leucotrichophora</em> decreased (p&lt;0.05). Similarly, the density of <em>Rumex hastatus</em> and <em>Oxalis latifolia</em> herbs increased, while that of <em>Desmodium elegans</em> and <em>Parthenium hysterophorus</em> herbs decreased in the post-fire scenario. Among the different species, <em>P. roxburghii</em> (tree)<em>, L. camara</em> (shrub)<em>,</em> and <em>P. hysterophorus</em> (herb), were the most prevalent in both the pre- and post-fire scenarios. The diversity and abundance of tree seedlings decreased, shrubs increased, and the diversity of herbs remained unaffected in post-fire scenarios. The results further showed that the forest fire increased the soil pH, EC, and nitrogen levels, although organic carbon and potassium content decreased. Moreover, fire did not alter the levels of bulk density, phosphorus, and sulphur in the soil. Overall present study suggested that fire affects structure and composition of vegetation as well as alters soil properties in the <em>Pinus roxburghii</em> forests.</div></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":"20 ","pages":"Article 100794"},"PeriodicalIF":2.7,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coppice response of Khasru (Quercus semecarpifolia) under partial cuttings","authors":"Shrabya Timsina ,&nbsp;Nora G. Hardy ,&nbsp;Mark S. Ashton","doi":"10.1016/j.tfp.2025.100797","DOIUrl":"10.1016/j.tfp.2025.100797","url":null,"abstract":"<div><div>Appropriate coppice treatments could help establish regeneration and structural complexity in degraded forests dominated by Khasru (<em>Quercus semecarpifolia</em>) – the most prominent species among Himalayan oaks. However, the effect of varying cutting intensities on the response of coppiced Khasru stumps has not been fully explored. In a Khasru forest in Nepal, we performed two partial cutting treatments – High-intensity Coppice (HighCop) and Low-Intensity Coppice (LowCop), with mean residual canopy cover of 11 % and 40 %, respectively. After ten months, we measured and compared sprouting response between the two treatments and modelled the probability of stump-sprouting with a logistic regression, using treatment-type and stump dimensions as predictors. Eighty-five percent of stumps (<em>n</em> = 41) resprouted in the LowCop treatment, while only 48 % resprouted in HighCop (<em>n</em> = 42). LowCop had a significantly greater number of coppice shoots per stump, but the total basal area of shoots and height of tallest shoot per stump were not significantly different. Shoot heights across both treatments suggest that Khasru coppice can grow faster than reported previously. Treatment-type was the only significant predictor of stump-sprouting success. Holding their dimensions constant, stumps were five times more likely to resprout in LowCop than HighCop. Our results contradict prior studies for other species of oak that report that the probability of sprouting either increases with, or is unaffected by, the intensity of cuttings. We establish that partial cuttings can promote satisfactory coppice response in Khasru and demonstrate that wider experimentation into Khasru coppice management is justified.</div></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":"19 ","pages":"Article 100797"},"PeriodicalIF":2.7,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143387439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stand structure, regeneration potential and carbon storage across Moist Temperate Forest of Chopal forest division in Himachal Pradesh","authors":"Ankita Chauhan ,&nbsp;CL Thakur ,&nbsp;DR Bhardwaj ,&nbsp;Dhirender Kumar ,&nbsp;Inder Dev ,&nbsp;Rajender Kumar ,&nbsp;Sahil Chauhan","doi":"10.1016/j.tfp.2025.100796","DOIUrl":"10.1016/j.tfp.2025.100796","url":null,"abstract":"<div><div>Himalayan moist temperate forests are one of the versatile and essential ecosystems for studying the biodiversity and carbon storage potential in Indian Himalayas. Therefore, a comprehensive assessment across eight sub-forest types (i.e. Ban oak forest, Moru oak forest, Moist deodar forest, Western mixed coniferous forest, Moist temperate deciduous forest, Low level blue pine forest, Kharsu oak forest and Western Himalayan upper oak fir forest) of Himalayan moist temperate forest was carried out in Chopal forest division of Himachal Pradesh to examine the species diversity, stand structure, biomass, carbon storage, regeneration status and site characteristics. The study revealed the highest tree density in the Moist deodar forest (338.10 number ha^-1) followed by Western Himalayan upper oak fir forest whereas, the lowest was recorded in Moist temperate deciduous forest. The basal area was highest in the Ban oak forest (61.02 m² ha^-1). Among vegetation indices Shannon-Wiener index (H) was highest in Western Himalayan upper oak fir forest (1.36) and lowest was in Ban oak forest (0.56). The Simpson's dominance index (D) was highest in Ban oak forest (0.63) and lowest was in Kharsu oak forest (0.25). Margalef's species richness (D_mg) was highest in the Moist temperate deciduous forest (1.38) and lowest in the Ban oak forest (0.29). Further, the stand structure analysis in all the sub-forest types revealed the highest number of trees in the mid-diameter classed i.e. 30–40 cm and 40–50 cm except for Ban oak forest, which had a greater number of trees in 80–90 cm diameter class. The total biomass (570.84 Mg ha^-1) and total carbon density (354.91 C Mg ha^-1) were found highest in Moist deodar forest whereas, the lowest was found in Moist temperate forest. The soil carbon density was highest (90.74 Mg C ha^-1) in Western Himalayan upper oak fir forest and lowest in Western mixed coniferous forest. The Moist deodar forest showed the satisfactory regeneration status among differs forest types. The soil physio-chemical properties such as soil pH, electrical conductivity and bulk density were highest in Moist temperate deciduous forest whereas, the organic carbon, available nitrogen, phosphorus and potassium were highest in Western Himalayan upper oak fir forest. Among all forest types, the Moist deodar forest showed the highest carbon storage capacity, whereas tree diversity and soil carbon density were highest in the Western Himalayan upper oak fir forest. Therefore, considering the current scenario of climate change, these two sub-forest types showed greater potential, which further needs the implication of sustainable management plans for the conservation of biodiversity and livelihood security.</div></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":"19 ","pages":"Article 100796"},"PeriodicalIF":2.7,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of resin tapping on the radial growth and climate sensitivity of naturally- regenerated Pinus roxburghii (Chir pine) in Western Nepal","authors":"Bipin Bhattarai ,&nbsp;Narayan Prasad Gaire ,&nbsp;Tek Maraseni ,&nbsp;Bishnu Prasad Devkota ,&nbsp;Badri Bhattarai ,&nbsp;Shankar Tripathi ,&nbsp;Kamal Raj Aryal ,&nbsp;Hari Adhikari","doi":"10.1016/j.tfp.2025.100795","DOIUrl":"10.1016/j.tfp.2025.100795","url":null,"abstract":"<div><div>The study investigated the effect of resin tapping on radial growth and climate sensitivity of naturally regenerated <em>Pinus roxburghii</em> (chirpine) in Western Nepal. We collected core samples (dbh&gt;30cm) from the community forest in the Salyan district: 26 from tapped and 33 from untapped trees situated in similar climatic, topographic, and ecological conditions. A tree-ring width chronology spanning 52 years was developed for both tapped and untapped trees. Statistical analyses, such as Pearson correlation and <em>t</em>-test, were used. Results indicate the untapped trees exhibited significantly higher basal area increment (BAI: <em>p</em> &lt; 0.05) than those of tapped trees, indicating that resin tapping negatively impacts tree growth. Furthermore, both tapped and untapped trees exhibited a positive correlation between radial growth and temperatures in May, June, July and August suggesting critical role of temperature in influencing the growth of <em>Pinus roxburghii</em> trees whether they have been tapped for resin or not. The rainfall in January, February, March, April, August, October, and December positively influenced the radial growth of both tapped and untapped trees, with only the rainfall in January having a significant effect on growth. Radial growth is impacted by the resin tapping while decreasing its recovery strength after stress as well. This study highlights the need for alternative resin-tapping practices that minimize negative impacts on tree growth. It also emphasizes the importance of considering rainfall and temperature patterns when planning tapping activities to ensure sustained resin production and promote tree health.</div></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":"19 ","pages":"Article 100795"},"PeriodicalIF":2.7,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}