Trees, Forests and People最新文献

{"title":"After-effects of Hurricane Dorian on Grand Bahama Pine Forest: Impacts on Pinus caribaea var. bahamensis (Bahamian pine) attributes revealed through in situ study and statistical predictive insights","authors":"Zeko McKenzie","doi":"10.1016/j.tfp.2024.100615","DOIUrl":"https://doi.org/10.1016/j.tfp.2024.100615","url":null,"abstract":"<div><p>On Grand Bahama, powerful hurricanes (tropical cyclones) of Category 3 and above have destroyed large sections of the pine vegetation across the island. As global mean temperatures and sea levels continue gradually increasing, more catastrophic hurricanes will likely affect Grand Bahama Island. This study incorporates in situ data and predictive modeling to investigate the impact of Hurricane Dorian, a Category 5 tropical cyclone, on the pine forest of Grand Bahama Island. Statistical results revealed significant predictors of hurricane damage were diameter at breast height (DBH), height, impact location, and elevation. Height was the most important predictor in all damage categories. Across all damaged categories, pine tree age, DBH, height, and elevation statistically differed. Dead short-older pine trees with larger DBH were more likely to be in the downed dead/uprooted damaged category, while pine trees with smaller DBH and slender stem were more likely to snap. Standing dead pine trees were common in lower elevation areas, whereas uprooted and snapped dead pine trees were prevalent at slightly higher elevations. These findings offer novel insights to help address the research gaps concerning the impact of powerful hurricanes on the pine forest structure in Grand Bahama. More pressingly, the literature on the impact of major hurricanes on the Bahamian pine forest is scarce. The International Union for Conservation of Nature (IUCN) highlights the need to update the habitat and ecology status of the Bahamian pine, noting gaps in the current literature.</p></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666719324001225/pdfft?md5=d0640681eb11bdc261df65279205c138&pid=1-s2.0-S2666719324001225-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141606525","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":"Assessing water storage capacity and wettability of plants and woody fragments in post-fire environments: A case study in Los Guájares, SE Spain","authors":"Anna Klamerus-Iwan ,&nbsp;Laura Cambronero Ruiz ,&nbsp;Casandra Muñoz Gómez ,&nbsp;Agata Warczyk ,&nbsp;Pranav Dev Singh ,&nbsp;Muhammad Owais Khan ,&nbsp;Andrés Caballero-Calvo","doi":"10.1016/j.tfp.2024.100607","DOIUrl":"https://doi.org/10.1016/j.tfp.2024.100607","url":null,"abstract":"<div><p>Wildfires pose significant threats to ecosystems, impacting soil properties and hydrological dynamics. This study investigates the water storage capacity and wettability of ecosystem elements, especially plants and woody fragments in post-fire areas of Los Guájares (Granada, SE Spain). Wildfires alter soil acidity, water storage, and nutrient concentration, affecting the hydrological properties of the forest floor. Understanding the water cycle is crucial for preserving and harnessing ecosystem capabilities. Plant wettability, a key parameter reflecting the ability to retain water on surfaces, is integral to the hydrological and ecological functioning of ecosystems. This research employs contact angle measurements and water storage capacity assessments to explore the relationship between leaves and wood wettability in areas affected by last year's fire (B) compared to adjacent unburned areas (U). The research was conducted in Los Guájares, characterized by steep slopes and Mediterranean climate, and utilized photography and angle measurements in graphic software for the wetting contact angle measurements and a weighing method for the plant surface water storage determination. Results reveal that average water capacity (S) decreases with increasing contact angle (CA) on both burned and unburned surfaces. Woody fragments, such as dry but unburned mango branches, exhibit the highest water capacity after 24 h of water immersion (S24), 1.10 [g^-1] of water, emphasizing the role of dead wood as a water reservoir. Burnt pine wood and fresh mango branches show lower water retention, indicating the impact of fire on water storage. Findings suggest that while the water capacity of leaves in new plants is similar between burned and unburned areas, wettability differs. This research provides insights into species selection for landscape conservation, informs hillslope restoration planning, and identifies areas resilient to droughts.</p></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666719324001146/pdfft?md5=015381550a046f9d77665047cdd7f6be&pid=1-s2.0-S2666719324001146-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141479912","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":"Judicial Mafia and ecological in-justice: Obstacles to policy enforcement in Indonesian forest management and protection","authors":"Atikah Mardhiya Rohmy,&nbsp;Hartiwiningsih,&nbsp;I Gusti Ayu Ketut Rachmi Handayani","doi":"10.1016/j.tfp.2024.100613","DOIUrl":"https://doi.org/10.1016/j.tfp.2024.100613","url":null,"abstract":"<div><p>Indonesia is among the eight nations with the greatest forests area in the world. One of the most powerful tools fighting global climate change is forest conservation. Appropriate, prudent, and practical regulations and policies are needed for the protection and preservation of forests. Therefore, Ecological justice-based environmental management is a concern for all nations in the world. To achieve this, regulations and policies must take into account the needs of both people and other forest ecosystem components. This article covers a range of Indonesian laws and policies of crimes related to forest destruction. It identifies three key challenges in achieving ecological justice. The first is the government's intervention and judicial mafia's involvement. The second is ineffective criminal penalties. Punishment for environmental destruction should employ an ecological perspective and a criminal system that promotes corrective justice, restorative justice, and rehabilitative justice. The final challenge is the dominance of political power and government intervention. Political interests influence the bureaucracy's changing tasks and responsibilities and cause the conflict of power.</p></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666719324001201/pdfft?md5=2a8ca9881651f15146e8162fdd633af6&pid=1-s2.0-S2666719324001201-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141541432","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":"Restoring a dry tropical forest through assisted natural regeneration: enhancing tree diversity, structure, and carbon stock","authors":"Rajive Rajapakshe ,&nbsp;Jeyavanan Karthigesu ,&nbsp;Sivananthawerl Thavananthan ,&nbsp;Sivamathy Sivachandiran ,&nbsp;Venukopan Navaneetham ,&nbsp;Sritharan Sinnamani","doi":"10.1016/j.tfp.2024.100616","DOIUrl":"https://doi.org/10.1016/j.tfp.2024.100616","url":null,"abstract":"<div><p>Deforestation is a key factor in global climate change, severely impacting ecosystem services. Effective implementation of reducing emissions from deforestation and forest degradation (REDD+) initiatives is essential for mitigating this change. Reforestation is a sustainable way to mitigate deforestation effects. We studied the impact of assisted natural regeneration (ANR) on restoring dry forest land, increasing biodiversity, structure, and carbon stock. Reforestation units were established at a multiple row planting system in a dry tropic region. We selected 63 plots, each 20 m × 20 m, categorized into multiple row–mixed plantation (MRMP) and multiple row–unmixed plantation (MRUP). We measured tree height and diameter at breast height (DBH) and evaluated biodiversity indices, including the Shannon–Weiner Index (SWI), species richness, evenness, and Important Value Index (IVI). Carbon stock was estimated using allometric equations. We identified 931 individual trees representing 27 species, 24 genera, and 14 families. MRMP showed significantly higher biodiversity, species richness, and evenness than MRUP. <em>Terminalia arjuna</em> was the most dominant species (IVI=124.45), followed by <em>Khaya senegalensis</em> (53.84). Survival rates exceeded 90 % for <em>T. arjuna, K. senegalensis, Madhuca longifolia</em>, and <em>Pongamia pinnata</em> (p&lt;0.001). No significant differences were observed in tree DBH, tree height, tree density, basal area, and carbon stock among the plantation categories. The species <em>Albizia saman</em> exhibited a high diameter increment rate (4.07 ± 1.55 cm/year), followed by <em>K. senegalensis</em> (3.83 ± 0.43 cm/year). A mean value of 5.63 ± 1.13 MgC/ha of carbon stock was stored, while 20.66 ± 4.13 Mg/ha of atmospheric CO₂ was sequestered. The results highlight that promoting mixed tree species in multiple rows to enhance biodiversity and optimize carbon regulation. This technique should be popularized to restore the dry forest landscape across the region.</p></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666719324001237/pdfft?md5=5dba259e742fbc7164af76272fa7fbdc&pid=1-s2.0-S2666719324001237-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141595198","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":"Hoping the best, expecting the worst: Forecasting forest fire risk in Algeria using fuzzy logic and GIS","authors":"Louiza Soualah ,&nbsp;Abdelhafid Bouzekri ,&nbsp;Haroun Chenchouni","doi":"10.1016/j.tfp.2024.100614","DOIUrl":"https://doi.org/10.1016/j.tfp.2024.100614","url":null,"abstract":"<div><p>Forest fires pose severe threats to ecosystems and communities globally, especially in vulnerable semi-arid regions like North Africa. Understanding the key factors influencing forest fire dynamics is essential for effective management and mitigation. This study aims to comprehensively analyze forest fire risk patterns in Djebel El Ouahch's massif (Algeria), focusing on integrating bioclimatic, fuel, geomorphological, and human factors through advanced fuzzy logic and geographic information system (GIS) techniques. Climatic station data, satellite imagery, and GIS were employed to map bioclimatic parameters, land cover, and geomorphological features. Fuzzy logic systems were applied to integrate these factors, assigning appropriate weights based on their significance. The resulting forest fire prediction model was defuzzified to generate predictive maps indicating varying vulnerability levels within the study area. Predictive maps delineated areas of low to high forest fire risk. Low-risk zones were characterized by sparse vegetation, while high-risk regions featured densely vegetated slopes near human settlements. The study identified critical factors influencing vulnerability, emphasizing the impact of climate, terrain, and human activities. Urgent attention was directed toward high-risk areas, necessitating tailored fire prevention measures and strategic urban planning to minimize human-induced risks. The results underscored the complex interaction of natural and anthropogenic factors in shaping forest fire susceptibility. Understanding these dynamics facilitates evidence-based policymaking, enhancing forest fire preparedness, biodiversity preservation, and community safety. Additionally, the study emphasized the need for continuous research incorporating real-time climate data and socio-economic factors to refine predictive models. This research provided valuable insights into forest fire risk patterns in Djebel El Ouahch, serving as a foundation for targeted fire management strategies. By bridging the gap between theoretical knowledge and practical application, this study contributes significantly to sustainable forest management and disaster mitigation efforts globally, emphasizing the importance of proactive measures in safeguarding vulnerable ecosystems and communities.</p></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666719324001213/pdfft?md5=7b3b5f4900c7ea9c5f3bdd5dc7691bc1&pid=1-s2.0-S2666719324001213-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141479893","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":"Tree species distributions in the United States and Canada under climate from 20,000 years ago to year 2100","authors":"Brice B. Hanberry","doi":"10.1016/j.tfp.2024.100612","DOIUrl":"https://doi.org/10.1016/j.tfp.2024.100612","url":null,"abstract":"<div><p>Current locations of species may not be suited to future climate, resulting in ranges that shift to higher latitudes, with potential for range expansion or contraction in extent. To identify potential shifts in distributions of 119 tree species centered in the United States and Canada, I modeled species occurrences under current climate and then predicted to past (20, 10, and 6 thousand years ago) and future climates (six projections during 2071–2100 for North American warming of 4.3 °C to 8.8 °C), with a singular focus on the climate space of tree species, or bioclimatic envelope models. Mean accuracies of withheld samples for models, based on climate of 1900 to 1990, were 0.97, with an average of 6.2 variables per model; annual temperature and temperature of the warmest quarter generally were the most important variables. Based on model predictions under past and future climate, centers of species distributions shifted an average of 565 km latitudinally since climate 20,000 years ago and 440 km to 1065 km shifts were expected in response to end-of-century climates. Overall, 64 tree species may gain more area than lose area that matches current climate space under future climate, whereas 36 species may lose potential climate space, with relative stability for 19 species. Canada and the mountainous western U.S., and National Forests in the mountainous western U.S., were likely to gain climate space appropriate for these species, particularly species of the eastern U.S. Conversely, greatest number of species were predicted to be lost from most of the eastern half of the U.S.; National Forests in the southeastern U.S., particularly in Alabama, Mississippi, and Texas, may lose 25 to 50 of these tree species. Isolation of potential dynamics for tree species already native to northern North America demonstrated that a large pool of diverse species from the southeastern U.S. was predicted to have suitable climate space in Canada and the western U.S. It may be beneficial for managers to become familiar with tree species south or east of their regions, particularly climate-tolerant pine and oak species, to determine which ones are desirable to manage for the future.</p></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666719324001195/pdfft?md5=951f26f68b03d01dee555d60332cba71&pid=1-s2.0-S2666719324001195-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141480046","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":"Factors influencing private woodland owners’ land management decisions on Lyme disease mitigation in Maine","authors":"Andres M. Urcuqui-Bustamante ,&nbsp;Katherine C. Perry ,&nbsp;Jessica Leahy ,&nbsp;Allison Gardner ,&nbsp;Carly Sponarski","doi":"10.1016/j.tfp.2024.100603","DOIUrl":"10.1016/j.tfp.2024.100603","url":null,"abstract":"<div><p>Tick-borne diseases (TBDs), including Lyme disease (LD), have become of great concern in the United States due to their impacts on individuals, communities, local businesses, and the national economy. Methods to mitigate the impact of TBDs often target tick habitat and wildlife hosts, yet the effectiveness of these methods is contingent on large-scale adoption by private woodland owners (PWOs) and agencies. As research has shown, adaptive land management methods may have a significative impact on LD mitigation in forest landscapes. Therefore, understanding how PWOs’ current and future decisions on land management methods may contribute to reducing human exposure to TBDs is critical. In this paper we characterize the factors influencing PWOs’ land management decisions and develop an improved understanding of their perception of LD as it relates to land management. We synthesize this information by identifying opportunities for and barriers against the adoption of adaptive land management methods among PWOs. We applied a quantitative survey to 355 PWOs from the state of Maine in fall of 2019 and spring of 2020. Our analysis sought to explore the relationships between PWOs’ individual characteristics and histories, and their knowledge, experience, perceptions, attitudes and sources of information regarding ticks and LD. Our findings show that the diversity of PWOs’ attitudes, perceptions of, and land management objectives requires to be approached in tandem. PWOs’ orientations toward LD management methods are significantly associated with several socio-demographic and land-ownership characteristics, such as gender, education background, size of woodlot and frequency of engagement in land management, supporting the inclusion of demographic data in future PWO behavior research. In this paper we discuss how sociodemographic characteristics alongside PWOs’ attitudes, perceptions of and land management objectives can be considered by agencies interested in promoting land management methods through targeted outreach and educational campaigns.</p></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666719324001109/pdfft?md5=604d4f68aebc45e0a0c462b90317377a&pid=1-s2.0-S2666719324001109-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141953557","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":"Management and biodiversity conservation in Central European forests","authors":"Robert Jandl ,&nbsp;Elena Haeler ,&nbsp;Georg Kindermann ,&nbsp;Katharina Lapin ,&nbsp;Janine Oettel ,&nbsp;Silvio Schüler","doi":"10.1016/j.tfp.2024.100601","DOIUrl":"https://doi.org/10.1016/j.tfp.2024.100601","url":null,"abstract":"<div><p>Active forest management and maintenance or restoration of biodiversity are intertwined. We describe several Central European forest types through typical management cycles and identify synergies and trade-offs with biodiversity conservation. Synergies emerge when the maintenance of forest structures supporting recognized human needs for biomass production create diverse habitats. On the stand level, relevant are tending interventions during stand development, the length of the production cycle, and the choice of tree species. Thinning promotes forest productivity, enhances structural heterogeneity, and the habitat diversity for many species groups. The vertical and horizontal diversity on the stand level is high in uneven-aged multi-species forests. The choice of the rotation period is controversial, because no balance between forest productivity, stand stability, and habitat quality is yet negotiated. On the landscape level heterogeneity arises when many actors implement a range of silvicultural concepts and management intensities. Deadwood of different dimensions provides multiple habitats and enhances biodiversity, but causes challenges for forest protection in some forest types. A possible compromise is setting aside unmanaged interconnected units with veteran trees (stepping-stone habitats). Damage caused by wildlife is an un-resolved issue in Central European forests. High ungulate populations are reducing the potentially emerging diversity of tree species by selective browsing. A controversial topic is the introduction of non-native tree species, potentially filling in where native tree species cannot cope with expected future site conditions. Their introduction may lead into uncharted territory with respect to biotic threats. In conclusion, the knowledge-based discourse between nature conservation and forest management needs to be continued to further develop the successful concept of multiple-use forestry.</p></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666719324001080/pdfft?md5=f13cd27a777549000d5525ca83bc23ed&pid=1-s2.0-S2666719324001080-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141433861","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":"Eucalyptus pellita harvest residue management in sandy tropical soils – nutrient content, decomposition and potential emissions from burning","authors":"Liubov Volkova ,&nbsp;Freddy Jontara Hutapea ,&nbsp;Josh R. Mitchell ,&nbsp;Daniel S. Mendham ,&nbsp;Christopher J. Weston","doi":"10.1016/j.tfp.2024.100611","DOIUrl":"https://doi.org/10.1016/j.tfp.2024.100611","url":null,"abstract":"<div><p>Plantation forestry on sandy, nutrient poor soils has been developed over the last few decades in seasonally dry tropical monsoon environments. Despite the known benefits of harvest residue conservation between rotations in temperate climes, there are very few studies around the world on <em>Eucalyptus</em> harvest residue management in tropical areas. In Northern Australia on Melville Island 30,000-hectares of <em>Acacia mangium</em> is planned to be converted to <em>Eucalyptus pellita. E. pellita</em> harvest residues comprise high loads of stringy bark, leaves and twigs, posing a fire risk throughout the annual 6-to-8-month dry season in Australia's monsoonal tropics. In this environment, quantifying and demonstrating the anticipated benefits of residue retention is important for determining appropriate responses to fire risk.</p><p>A 4-hectare experimental trial of 12-year-old <em>E. pellita</em> was cut with trees moved intact to the coupe edge and processed for woodchips. The tree residues from the roadside chipper were pushed back over the site. A total of 35 Mg ha⁻¹ of harvest residue was left on the site, mainly comprised of bark (24.5 Mg ha⁻¹ or 60 % of the total residue mass). Although the leaf and branch residues contained higher concentrations of N, Ca, Cu, K, Mg, Mn, P, and Zn than bark, stem and woodchips, bark N (51.5 kg ha⁻¹) was twice foliage N (26.9 kg ha⁻¹), and contributed to more than 50 % of residue N.</p><p>Harvest residue bark, leaves and twigs were sampled for a litterbag decomposition study of mass loss on the harvested site. After 10 months about 80 % of bark original weight remained on site (20 % mass loss), compared to about 55 % of the leaves/twigs remaining (45 % mass loss).</p><p>The potential non-CO₂ emissions from the burning of <em>E. pellita</em> harvest residues were estimated at 12.3 Mg CO₂-eq ha⁻¹ or 3.35 Mg C ha⁻¹, with the majority of emission arising from the smoldering of bark residues. This study discusses the implications of either retaining or burning harvest residues – for plantation long-term sustainability on sandy tropical sites, and for greenhouse gas emissions.</p></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666719324001183/pdfft?md5=9142a5b1036f49ff689a3b26a8d6423c&pid=1-s2.0-S2666719324001183-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141479894","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":"Ecological partnership: Restoring Pinyon woodlands on the Navajo Nation, USA","authors":"Lionel Whitehair ,&nbsp;Benita Litson ,&nbsp;Bryan Neztsosie ,&nbsp;Demetra Skaltsas ,&nbsp;Jonathan Martin ,&nbsp;Jared Begay ,&nbsp;Leo O'Neill ,&nbsp;Peter Z. Fulé","doi":"10.1016/j.tfp.2024.100605","DOIUrl":"https://doi.org/10.1016/j.tfp.2024.100605","url":null,"abstract":"<div><p>Pinyon woodlands in the semi-arid southwestern United States developed in response to environmental factors and historical human interactions, providing sustenance and traditional ecological benefits to Native Nations, such as the Navajo (Diné). Historically, Diné communities practiced land stewardship through seasonal movements and resource management, ensuring ecosystem resilience. However, the constraints imposed by European colonization led to transformative changes in their livelihoods and environments. Encompassing 71,000 km², pinyon-juniper woodlands comprise 89 % of forested area on the Navajo Nation reservation, providing crucial ecosystem services and cultural resources. Since reservation establishment in 1868, increased tree density has diminished understory plant communities and elevated woodland susceptibility to wildfires, compromising overall forest health. Recognizing the imperative for ecological restoration, a collaborative effort between Diné College and Northern Arizona University (NAU) was established in 2018 to develop a pinyon woodland research site on the Diné College campus in Tsaile, Arizona, on the Navajo Nation reservation. We assessed the effectiveness of restoration thinning treatments in reinstating historical woodland structure, modifying fuels for fire mitigation, and engaging students in ecological practices. Thinning resulted in a 62 % reduction in tree density and a 25 % reduction in basal area, altering the woodland structure to reflect historical conditions more accurately. This alteration mitigated the risk of high-intensity wildfires while preserving the age structure of older trees (oldest dating back to 1435 C.E.). Forest floor fuels were low throughout the study, as thinned wood was removed, and activity fuels were immediately treated with chipping. The active participation of Diné College and NAU students, interns, and faculty throughout the study contributed to a cohesive approach in advancing our goals. The comprehensive training empowered students to contribute meaningfully to fieldwork and data collection, aligning with Diné College's mission to enhance post-secondary student learning and development for the benefit of the Diné. By integrating contemporary and culturally sensitive perspectives, our study sheds light on the effectiveness of restoration thinning treatments, emphasizing the delicate balance between ecological resilience and cultural preservation for the Navajo Nation.</p></div>","PeriodicalId":36104,"journal":{"name":"Trees, Forests and People","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666719324001122/pdfft?md5=9ab1b67d8c2b9ebc518c68a74b537d66&pid=1-s2.0-S2666719324001122-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141423839","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}