Trees, Forests and People最新文献

{"title":"Distance to canopy edge and tree trunk proximity affect understory temperature and humidity in urban tree stands","authors":"Ignacio C. Fernández ,&nbsp;Joaquín Merino ,&nbsp;Thomas Koplow-Villavicencio","doi":"10.1016/j.tfp.2025.100826","DOIUrl":"10.1016/j.tfp.2025.100826","url":null,"abstract":"<div><div>Climate change is increasing extreme temperatures in urban areas, degrading environmental quality and threatening the health of vulnerable human populations. Planting trees has become a key strategy for regulating urban temperatures, particularly for reducing heat extremes during hot weather. Trees provide shade and increase moisture, lowering below-canopy temperatures. This cooling effect could be enhanced by planting trees in groups. However, information on how the spatial arrangement of trees within tree stands influences below-canopy microclimatic conditions in urban areas is scarce. In this study, we evaluate how below-canopy temperature and relative humidity are affected by the spatial arrangement of trees within urban tree stands, specifically testing the impact of distances to the canopy edge and tree trunks on these microclimatic variables. We assessed these relationships by collecting empirical data from five even-aged tree stands, located in an urban park in Santiago, Chile. A 10 × 10 m grid of 25 sensors was used to measure below-canopy climatic variables, and the distance from each sensor to the edge of the canopy and to the closest tree trunks was recorded. Data was collected on three different days for each stand on warm, sunny days, and linear mixed models were applied to test the relationships. Our results show that all tree stands reduce below-canopy temperatures compared to surrounding areas. Additionally, we identified distance-dependent effects of tree canopy and trunks on below-canopy temperatures and relative humidity, with a relatively larger effect of distance to the canopy cover. However, these results varied significantly between stands, with some stands showing no effects. Increasing our understanding of how the spatial arrangement of trees influences their cooling capacity is crucial for planning urban vegetation to mitigate rising temperatures in urban areas.</div></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":"20 ","pages":"Article 100826"},"PeriodicalIF":2.7,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143600581","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":"Reconciling different interests in the Hutan Harapan rainforest ecosystem restoration management in Sumatra, Indonesia","authors":"Mangarah Silalahi ,&nbsp;Dodik R. Nurrochmat ,&nbsp;Rhett D. Harrison ,&nbsp;Irdika Mansur ,&nbsp;Thomas A. Walsh ,&nbsp;Habibi","doi":"10.1016/j.tfp.2025.100823","DOIUrl":"10.1016/j.tfp.2025.100823","url":null,"abstract":"<div><div>The Hutan Harapan is the last remaining lowland tropical rainforest in Sumatra, with an area of ca. 100,000 ha (hectares). It was granted by the Ministry of Forestry to a private company (PT REKI) with an Ecosystem Restoration Concession (ERC) license to carry out forest restoration. ERC is a new market-oriented policy option in Indonesia that promotes private investment in restoring and managing production forests to reverse deforestation and contribute to ambitious global restoration targets. Despite being a logged-over area, Hutan Harapan is still rich in biodiversity, home to the Batin Sembilan indigenous people and the Malay tribe, as well as many migrants. However, Hutan Harapan has become a forest island surrounded by oil palm plantations, monoculture industrial timber estates, and agricultural lands. As a result, Hutan Harapan has become highly accessible and exposed to threats such as encroachment, illegal logging, poaching, and forest fires. This study presents lessons from PT REKI's experience in the forest in addressing complex issues and threats with different management approaches. Stakeholder analysis, participation and social capital theory, and ladder participation theory are used to analyze the forest management approach taken by PT REKI. This company has implemented stakeholder engagement strategies in its operations, used social capital in conflict resolution and law enforcement, conducted tiered participation, and promoted multipurpose forest management to address threats, deforestation, encroachment, forest fires, and other illegal activities. Using these approaches, PT REKI has delivered a remarkably positive outcome, as evidenced by declining rates of deforestation and illegal activities, effective conflict resolution, prevention of forest and land fires, and garnering support from surrounding concessionaires and other stakeholders. It has resulted in land use stabilization, reduced social costs, a positive corporate image, and broader stakeholder support, instilling hope for the future of forest management. PT REKI, however, still faces many challenges due to heightened social pressures, wildlife poaching, and land clearing for oil palm development.</div></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":"20 ","pages":"Article 100823"},"PeriodicalIF":2.7,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682720","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":"Assessment of Gayo agroforestry coffee characteristics and carbon stock potential in Mumuger social forestry area, Central Aceh Regency","authors":"Rahmat Pramulya ,&nbsp;Dahlan Dahlan ,&nbsp;Rahmat Asy'Ari ,&nbsp;Ardya Hwardaya Gustawan ,&nbsp;Ali Dzulfigar ,&nbsp;Elida Novita ,&nbsp;Adi Sutrisno ,&nbsp;Devi Maulida Rahmah","doi":"10.1016/j.tfp.2025.100818","DOIUrl":"10.1016/j.tfp.2025.100818","url":null,"abstract":"<div><div>Coffee agroforestry has become a nature-based solution for controlling climate change impacts while, providing access to sustainable forest utilization for rural farmers, especially for the governance of social forestry policies in Indonesia. Ecosystem services established in coffee agroforestry provide high-carbon stocks that can reduce greenhouse gas emissions to the atmosphere. Statistical and spatial information on carbon stocks in coffee agroforestry in the Sumatran tropical forest region, especially above ground carbon (AGC), is still very limited. Therefore, this study aims to assess the available carbon stocks in Gayo coffee agroforestry in Mumuger Social Forestry Area, Central Aceh Regency, with the help of combining multi-source data (Landsat-Sentinel-NICFI imagery) and involving machine learning algorithms in estimation modelling. The agroforestry carbon stock distributed in the study area has 72.31 ± 48.46 Mg C ha^-1, which is dominated by the Leucaena-coffee agroforestry combination. There are 13 species at the overstory level that contribute carbon stock values up to 198 Mg C ha^-1. Based on modelling tests of carbon stock estimation using 37 predictors, the two best machine-learning algorithms were RF and SVM, with R² reaching 0.83 and 0.85. Carbon stock quantification information and remote sensing machine learning approaches play a strategic role in studying the impacts of agroforestry systems and as a policy evaluation in social forestry governance that can contribute to climate change mitigation.</div></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":"20 ","pages":"Article 100818"},"PeriodicalIF":2.7,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593330","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 COVID-19 on visitor attitude and management strategies at Komodo National Park: Insights for enhancing park adaptive experience","authors":"Ari Rahman ,&nbsp;Sapta Suhardono ,&nbsp;Evi Siti Sofiyah ,&nbsp;Imelda Masni Juniaty Sianipar ,&nbsp;Chun-Hung Lee ,&nbsp;I Wayan Koko Suryawan","doi":"10.1016/j.tfp.2025.100825","DOIUrl":"10.1016/j.tfp.2025.100825","url":null,"abstract":"<div><div>The COVID-19 pandemic significantly impacted the dynamics of visitor behavior and management strategies at national parks, particularly at Komodo National Park, situated within a critical forest ecosystem. This study deployed Structural Equation Modeling (SEM) to assess how changes induced by the pandemic affected visitor intentions to revisit the park. Key findings include the influence of perceived behavioral control and adaptive experiences on revisitation intentions. Specifically, Hypothesis 1 highlighted that visitor attitudes moderately influence social norms. Hypothesis 2 found no significant effect of perceived behavioral control on social norms. Hypothesis 3 and Hypothesis 4 demonstrated strong relationships between visitor attitudes and adaptive experiences, and between social norms and adaptive experiences, respectively. Hypothesis 5 showed that perceived behavioral control does not significantly impact adaptive experiences, while Hypothesis 6 and Hypothesis 7 revealed that both perceived behavioral control and adaptive experiences significantly influence the intention to revisit. These insights underscore the need for adaptive management strategies that enhance safety, engagement, and education, facilitating sustainable tourism and conservation in the post-pandemic landscape within the forested areas of the park. The study's recommendations aim to improve visitor experiences and park resilience, aligning with global efforts to adapt to evolving tourist expectations and environmental concerns.</div></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":"20 ","pages":"Article 100825"},"PeriodicalIF":2.7,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620952","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":"Growth of young Melia azedarach trees in abandoned farmlands as planting sites in western Japan","authors":"Nobuhiko Kasuya ,&nbsp;Akihiro Sumida ,&nbsp;Norio Ikeda ,&nbsp;Yasushi Ueno ,&nbsp;Hisashi Miyafuji","doi":"10.1016/j.tfp.2025.100822","DOIUrl":"10.1016/j.tfp.2025.100822","url":null,"abstract":"<div><div><em>Melia azedarach</em> is a fast-growing broad-leaved deciduous species native to Japan, and in recent years it has been regarded as a promising silvicultural tree species. The objective of this study was to clarify the factors controlling the growth of the target species in the field. Thirty-three research sites were established in western Japan, where stem diameter at ground level (D0) and at 1.2 m in height (D) and tree height (H) were measured every year, to compare the annual growth rates of individual trees. The stand age ranged from 1 to 8 years at the end of 2021. The mortality rate of each study site in 3 years after planting was higher when the mean temperature in the coldest month, January, was low. When this temperature is below 0 °C, the rate is higher than approximately 0.3. Analysis using general linear mixed models revealed that fertilizer application and the type of planted area (abandoned farmland) positively affected the annual growth rates of D0, D and H (ΔD0, ΔD and ΔH, respectively). The presence of an animal barrier positively affected ΔD0 and ΔH. Temperature in August and precipitation between July and August had a positive and negative effect on ΔD, respectively, whereas temperature in June had positive effect on ΔH. These findings can help to promote efficient silviculture by identifying good planting sites and management plans. Abandoned farmland is considered to be a prospective planting site, compared with forest.</div></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":"20 ","pages":"Article 100822"},"PeriodicalIF":2.7,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143579212","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":"Characterizing draft animal logging operations in the southeastern United States","authors":"Lucas P. Hales ,&nbsp;Justin L. Hart ,&nbsp;Patrick Hiesl ,&nbsp;Matthew C. LaFevor ,&nbsp;Ian M. Snider","doi":"10.1016/j.tfp.2025.100824","DOIUrl":"10.1016/j.tfp.2025.100824","url":null,"abstract":"<div><div>Conventional forest management has become largely inaccessible for most family forest landowners in the southeastern United States because of growing incongruencies between the small tract sizes of family forests and the tract size requirements of mechanized logging firms. Compared to conventional mechanized logging, draft animal logging has relatively minimal costs and ecological impacts, making it an appealing candidate to fill the small-parcel ecological forest management niche. However, little is known about the current status of the practice in the southeastern US. We investigated the prevalence of draft animal logging in eight Southeastern states and elucidated demographic and operational characteristics of its practitioners with a survey, evaluating the ability of the current network of draft animal loggers to meet forest management needs. Findings indicate that the practice has potential as a small-parcel forest management option, but current opportunities are limited by the small number of draft animal loggers operating in the region.</div></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":"20 ","pages":"Article 100824"},"PeriodicalIF":2.7,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563142","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":"Evaluation of tree diversity of native species in silvopastoral systems in the northwestern Amazon region","authors":"Manuel Oliva-Cruz,&nbsp;Damaris Leiva-Tafur,&nbsp;Lily Juarez-Contreras,&nbsp;Jorge Luis Maicelo Quintana,&nbsp;Elí Pariente,&nbsp;Lorenzo Culqui","doi":"10.1016/j.tfp.2025.100821","DOIUrl":"10.1016/j.tfp.2025.100821","url":null,"abstract":"<div><div>In the Peruvian Amazon, 70 % of deforested forests are used for grazing, where inadequate management leads to overgrazing, soil compaction, and degradation. Silvopastoral systems (SPS) represent a sustainable alternative by integrating native trees with livestock production, promoting biodiversity and ecological stability. This study evaluated the diversity and ecology of native species in SPS in the Amazon region through a systematic sampling in 10 points. The importance value index (IVI), diversity (index Shannon, index Simpson, index Dominance, and Margalef´s index), and floristic similarity (Sørensen's index) were analyzed. Twenty-eight species belonging to 23 families were identified, with <em>Nectandra</em> sp. and <em>Myrsine coriacea</em> standing out for their abundance and distribution. Most individuals present diameters between 10 and 20 cm, indicating a community in its juvenile stage. In addition, <em>Myrcianthes</em> sp. and <em>Podocarpus glomeratus</em> favor phosphorus fixation, <em>Ficus</em> sp. improves potassium availability, and <em>Alnus acuminata</em> and <em>Inga adenophylla</em> contribute to soil alkalinization. These findings highlight the role of SPS in ecological resilience and biodiversity conservation, promoting their integration into sustainable livestock strategies that optimize productivity without compromising ecosystem stability.</div></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":"20 ","pages":"Article 100821"},"PeriodicalIF":2.7,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143547828","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":"Estimation of aboveground biomass of savanna trees using quantitative structure models and close-range photogrammetry","authors":"Finagnon Gabin Laly,&nbsp;Gilbert Atindogbe,&nbsp;Hospice Afouda Akpo,&nbsp;Noël Houédougbé Fonton","doi":"10.1016/j.tfp.2025.100791","DOIUrl":"10.1016/j.tfp.2025.100791","url":null,"abstract":"<div><div>In efforts to mitigate climate change and optimize resource management, the demand for accurate aboveground biomass (AGB) estimates has significantly increased. Traditional AGB estimation methods rely on allometric models, which have inherent limitations. Recent advancements in remote sensing technologies present new opportunities for obtaining precise and nondestructive AGB data. This study evaluated the accuracy of AGB estimates derived from close-range photogrammetry (CRP), comparing it with destructive sampling and allometric equations. Thirty trees from five Sudanian savanna species, spanning six diameter classes, were photographed with a handheld camera. Images were processed to reconstruct 3D models of the trees, from which tree volume was calculated using quantitative structure models (QSM) and converted to AGB with species-specific wood density. Agreement between reference and estimated AGB was assessed using coefficient of variation of root mean square error (RMSE%), mean absolute bias (MAB) and concordance correlation coefficient (CCC). CRP-derived AGB closely matched with reference data (RMSE% = 23.4%, CCC = 0.98, MAB = 241 kg) and outperformed pantropical (RMSE% = 81.6%, CCC = 0.62, MAB = 694 kg) and regional (RMSE% = 74.3%, CCC = 0.70, MAB = 640 kg) allometric models. Accuracy varied by tree size, with CRP performing best for trees with DBH ≥ 30 cm. These results demonstrate CRP's effectiveness in AGB estimation for Sudanian savanna trees and its potential for timely, accurate, and scalable assessments across diverse ecosystems.</div></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":"19 ","pages":"Article 100791"},"PeriodicalIF":2.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510296","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":"Forest canopy height mapping using ICESat-2 data to aid forest management in a Canadian Arctic community: A case study of Kluane First Nation, Yukon, Canada","authors":"Ravi Darwin Sankar ,&nbsp;Finella Pescott ,&nbsp;Kate Hicks ,&nbsp;Maribeth S. Murray","doi":"10.1016/j.tfp.2024.100760","DOIUrl":"10.1016/j.tfp.2024.100760","url":null,"abstract":"<div><div>As an essential indicator of a forest's growth capacity and rate, the increased accuracy, ease of access, processing and visualization of canopy height information can facilitate a targeted range of strategies for sustainable forest management, especially among citizen scientists and community members. Here, forest canopy height is estimated for several land parcel segments in a subarctic locale using ground-based measurements as well as photon and elevation data obtained from NASA's Ice, Cloud, and land Elevation satellite (ICESat-2). ICESat-2 offers a comprehensive view of vegetation structure and provides a unique opportunity to quantify forest canopy height changes, productivity and distribution in remote locations where it is often arduous and cost prohibitive to acquire ground data. Average canopy heights returned from ICESat-2 data compared with field measurements of above-ground biomass yielded a <em>R</em>² of 0.53, and root mean square error of 1.45 m, amplifying the use and potential value of this dataset and novel platform for multiple user groups interested in forestry mapping and ongoing monitoring of forest canopy height with increasing frequency to facilitate community-led decision making. This study demonstrates the utility and benefit of integrating remotely sensed data and field-based survey measurements to generate complementary information related to forest structure and diversity in this region.</div></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":"19 ","pages":"Article 100760"},"PeriodicalIF":2.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510297","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":"Forests and Food: Challenges and Opportunities","authors":"Mi Sun Park ,&nbsp;Terry C.H. Sunderland","doi":"10.1016/j.tfp.2025.100799","DOIUrl":"10.1016/j.tfp.2025.100799","url":null,"abstract":"","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":"19 ","pages":"Article 100799"},"PeriodicalIF":2.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510298","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}