Forest Ecology and Management最新文献

{"title":"Tree retention levels and prescribed burning effects on ectomycorrhizal fungal communities in a boreal Scots pine forest","authors":"Delphine Lariviere ,&nbsp;Line Djupström ,&nbsp;Björn D. Lindahl ,&nbsp;Anders Dahlberg","doi":"10.1016/j.foreco.2025.123186","DOIUrl":"10.1016/j.foreco.2025.123186","url":null,"abstract":"<div><div>Ectomycorrhizal fungi (EMF) form essential symbiotic relationships with trees, supporting nutrient cycling and forest health. However, forestry practices such as clear-cutting disrupt this association, threatening EMF survival. This study investigated the effects of tree retention levels and prescribed burning on EMF abundance, species richness, and community composition in old Scots pine forests 4.5 years after logging. Soil samples were analyzed using DNA sequencing, with stand-level replication. Higher retention levels were associated with increased EMF abundance and diversity, while proximity and size of retention trees significantly influenced outcomes. Species richness declined sharply beyond 5–10 m from retained trees. The greatest declines occurred under minimal retention (3 %) and when prescribed burning was combined with a 50 % harvest. Prescribed burning with 50 % tree removal exacerbated EMF losses in the short-term, likely due to the combined effects of harvesting and fire severity, highlighting the need for careful integration of fire management into forestry practices. Community composition shifted noticeably, with disturbance-tolerant taxa replacing dominant species from older forests. Rare species were disproportionately affected by substantial tree removal, while common species persisted. These findings highlight the importance of retaining higher tree densities and strategically placing retention trees. Sustainable management of old boreal Scots pine forests requires tailored retention strategies and cautious planning of harvesting and prescribed burning to balance biodiversity conservation with forestry objectives.</div></div>","PeriodicalId":12350,"journal":{"name":"Forest Ecology and Management","volume":"598 ","pages":"Article 123186"},"PeriodicalIF":3.7,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Native forest cover, fragmentation, and seasonality shape functional diversity in forest bird communities","authors":"Roberto F. Thomson ,&nbsp;Andrew G. Gosler","doi":"10.1016/j.foreco.2025.123201","DOIUrl":"10.1016/j.foreco.2025.123201","url":null,"abstract":"<div><div>Biodiversity encompasses genetic, species, and ecosystem diversity, all of which are threatened by habitat loss and fragmentation driven by human activities. We evaluated how the replacement of native Maulino forest by pine (<em>Pinus radiata</em>) plantations affects forest bird communities, focusing on functional diversity and landscape configuration. The study was conducted in South Central Chile across 22 landscape units (4 km² each), where bird surveys were conducted during both the breeding and non-breeding seasons. Functional diversity was assessed using functional richness (FRic), functional evenness (FEve), and functional dispersion (FDis). We recorded 26 forest bird species. Species richness was higher in native forests, where large tree users (LTU) dominated, whereas pine plantations favored shrub and vertical profile generalists. During the breeding season, FRic increased with native cover but declined with higher patch density, indicating that fragmentation constrains the functional breadth of communities. FEve and FDis showed weaker associations with landscape metrics, although fragmented forests tended to support more even but less functionally diverse assemblages. Seasonal patterns were evident, with of landscape structure being stronger in the breeding season. These results highlight the combined roles of habitat amount, configuration, and seasonal dynamics in shaping functional diversity. Conservation strategies should prioritize the retention of large tracts of native forest, limit further fragmentation, and maintain structural features such as mature trees to sustain key ecological functions.</div></div>","PeriodicalId":12350,"journal":{"name":"Forest Ecology and Management","volume":"598 ","pages":"Article 123201"},"PeriodicalIF":3.7,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Native forest cover, fragmentation, and seasonality shape functional diversity in forest bird communities","authors":"Roberto F. Thomson ,&nbsp;Andrew G. Gosler","doi":"10.1016/j.foreco.2025.123201","DOIUrl":"10.1016/j.foreco.2025.123201","url":null,"abstract":"<div><div>Biodiversity encompasses genetic, species, and ecosystem diversity, all of which are threatened by habitat loss and fragmentation driven by human activities. We evaluated how the replacement of native Maulino forest by pine (<em>Pinus radiata</em>) plantations affects forest bird communities, focusing on functional diversity and landscape configuration. The study was conducted in South Central Chile across 22 landscape units (4 km² each), where bird surveys were conducted during both the breeding and non-breeding seasons. Functional diversity was assessed using functional richness (FRic), functional evenness (FEve), and functional dispersion (FDis). We recorded 26 forest bird species. Species richness was higher in native forests, where large tree users (LTU) dominated, whereas pine plantations favored shrub and vertical profile generalists. During the breeding season, FRic increased with native cover but declined with higher patch density, indicating that fragmentation constrains the functional breadth of communities. FEve and FDis showed weaker associations with landscape metrics, although fragmented forests tended to support more even but less functionally diverse assemblages. Seasonal patterns were evident, with of landscape structure being stronger in the breeding season. These results highlight the combined roles of habitat amount, configuration, and seasonal dynamics in shaping functional diversity. Conservation strategies should prioritize the retention of large tracts of native forest, limit further fragmentation, and maintain structural features such as mature trees to sustain key ecological functions.</div></div>","PeriodicalId":12350,"journal":{"name":"Forest Ecology and Management","volume":"598 ","pages":"Article 123201"},"PeriodicalIF":3.7,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tree retention levels and prescribed burning effects on ectomycorrhizal fungal communities in a boreal Scots pine forest","authors":"Delphine Lariviere ,&nbsp;Line Djupström ,&nbsp;Björn D. Lindahl ,&nbsp;Anders Dahlberg","doi":"10.1016/j.foreco.2025.123186","DOIUrl":"10.1016/j.foreco.2025.123186","url":null,"abstract":"<div><div>Ectomycorrhizal fungi (EMF) form essential symbiotic relationships with trees, supporting nutrient cycling and forest health. However, forestry practices such as clear-cutting disrupt this association, threatening EMF survival. This study investigated the effects of tree retention levels and prescribed burning on EMF abundance, species richness, and community composition in old Scots pine forests 4.5 years after logging. Soil samples were analyzed using DNA sequencing, with stand-level replication. Higher retention levels were associated with increased EMF abundance and diversity, while proximity and size of retention trees significantly influenced outcomes. Species richness declined sharply beyond 5–10 m from retained trees. The greatest declines occurred under minimal retention (3 %) and when prescribed burning was combined with a 50 % harvest. Prescribed burning with 50 % tree removal exacerbated EMF losses in the short-term, likely due to the combined effects of harvesting and fire severity, highlighting the need for careful integration of fire management into forestry practices. Community composition shifted noticeably, with disturbance-tolerant taxa replacing dominant species from older forests. Rare species were disproportionately affected by substantial tree removal, while common species persisted. These findings highlight the importance of retaining higher tree densities and strategically placing retention trees. Sustainable management of old boreal Scots pine forests requires tailored retention strategies and cautious planning of harvesting and prescribed burning to balance biodiversity conservation with forestry objectives.</div></div>","PeriodicalId":12350,"journal":{"name":"Forest Ecology and Management","volume":"598 ","pages":"Article 123186"},"PeriodicalIF":3.7,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Root exudate-driven mycorrhizal suppression underlies Indocalamus tessellatus invasion: Evidence from field and pot experiments","authors":"Zhuangzhuang Qian ,&nbsp;Guorui Xie ,&nbsp;Qinglai Dang ,&nbsp;Lu Qiu ,&nbsp;Gang Lei ,&nbsp;Bo Deng","doi":"10.1016/j.foreco.2025.123189","DOIUrl":"10.1016/j.foreco.2025.123189","url":null,"abstract":"<div><div>Bamboo invasion into adjacent native forests poses significant threats to aboveground biodiversity and disrupts belowground soil processes. However, the ecological mechanisms driving <em>Indocalamus tessellatus</em> invasion are complex and remain poorly understood. This study combined field and controlled-environment experiments to investigate the effects of <em>I. tessellatus</em> invasion on plant communities, soil properties, and rhizosphere interactions. Field observations revealed that bamboo invasion significantly reduced shrub-layer diversity (Simpson and Pielou indices) in mixed coniferous-broadleaf forests, while arborous and herbaceous layers remained unaffected. Mycorrhizal colonization rates declined in five native species (<em>Pinus massoniana, Pteridium aquilinum, Eurya japonica, Symplocos stellaris</em>, and <em>Loropetalum chinense</em>), correlating with population declines in four species (<em>P. massoniana</em> excluded). Invasion also intensified soil acidification and altered nitrogen cycling, leading to decreased ammonium and nitrate levels. To examine potential allelopathic effects, we performed a pot experiment with <em>L. chinense</em> seedlings under simulated litter addition, root exudate addition, and combined treatments. Laboratory experiments demonstrated that <em>I. tessellatus</em> root exudates induced pronounced soil acidification, reducing <em>L. chinense</em> height gain by 25.40 % and mycorrhizal colonization by 48.73 %, whereas litter-mediated effects were less substantial. Although microbial α-diversity remained stable, root exudates reshaped bacterial and fungal community composition. Structural equation modeling identified root exudates as key drivers of growth inhibition via mycorrhizal suppression. These findings highlight the critical role of belowground mechanisms—root exudate-mediated soil acidification, mycorrhizal suppression, and microbial restructuring—in bamboo invasion. Understanding these processes provides actionable insights for managing invasive species and conserving biodiversity.</div></div>","PeriodicalId":12350,"journal":{"name":"Forest Ecology and Management","volume":"598 ","pages":"Article 123189"},"PeriodicalIF":3.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Root exudate-driven mycorrhizal suppression underlies Indocalamus tessellatus invasion: Evidence from field and pot experiments","authors":"Zhuangzhuang Qian ,&nbsp;Guorui Xie ,&nbsp;Qinglai Dang ,&nbsp;Lu Qiu ,&nbsp;Gang Lei ,&nbsp;Bo Deng","doi":"10.1016/j.foreco.2025.123189","DOIUrl":"10.1016/j.foreco.2025.123189","url":null,"abstract":"<div><div>Bamboo invasion into adjacent native forests poses significant threats to aboveground biodiversity and disrupts belowground soil processes. However, the ecological mechanisms driving <em>Indocalamus tessellatus</em> invasion are complex and remain poorly understood. This study combined field and controlled-environment experiments to investigate the effects of <em>I. tessellatus</em> invasion on plant communities, soil properties, and rhizosphere interactions. Field observations revealed that bamboo invasion significantly reduced shrub-layer diversity (Simpson and Pielou indices) in mixed coniferous-broadleaf forests, while arborous and herbaceous layers remained unaffected. Mycorrhizal colonization rates declined in five native species (<em>Pinus massoniana, Pteridium aquilinum, Eurya japonica, Symplocos stellaris</em>, and <em>Loropetalum chinense</em>), correlating with population declines in four species (<em>P. massoniana</em> excluded). Invasion also intensified soil acidification and altered nitrogen cycling, leading to decreased ammonium and nitrate levels. To examine potential allelopathic effects, we performed a pot experiment with <em>L. chinense</em> seedlings under simulated litter addition, root exudate addition, and combined treatments. Laboratory experiments demonstrated that <em>I. tessellatus</em> root exudates induced pronounced soil acidification, reducing <em>L. chinense</em> height gain by 25.40 % and mycorrhizal colonization by 48.73 %, whereas litter-mediated effects were less substantial. Although microbial α-diversity remained stable, root exudates reshaped bacterial and fungal community composition. Structural equation modeling identified root exudates as key drivers of growth inhibition via mycorrhizal suppression. These findings highlight the critical role of belowground mechanisms—root exudate-mediated soil acidification, mycorrhizal suppression, and microbial restructuring—in bamboo invasion. Understanding these processes provides actionable insights for managing invasive species and conserving biodiversity.</div></div>","PeriodicalId":12350,"journal":{"name":"Forest Ecology and Management","volume":"598 ","pages":"Article 123189"},"PeriodicalIF":3.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Two decades of forest understory vegetation development in a 445-year chronosequence in the Siskiyou mountains of southwestern Oregon, USA","authors":"Molly B. Smith Metok ,&nbsp;Matthew J. Reilly ,&nbsp;Maureen J. Jules ,&nbsp;Erik S. Jules","doi":"10.1016/j.foreco.2025.123148","DOIUrl":"10.1016/j.foreco.2025.123148","url":null,"abstract":"<div><div>Conversion of natural forests to managed forests has reduced the amount of older, structurally diverse forests worldwide. In coniferous forests of the Pacific Northwest (USA), where understory plants represent 90 % of the species but only 1 % of forest biomass, the long-term impacts of timber harvesting remain unclear. We investigated these impacts by remeasuring a chronosequence of forests in the Siskiyou Mountains, Oregon, initially sampled in 2003. In 2021, we resurveyed 13 plots (2500 m² each), ranging from 25 to 445 years in age, to assess changes in the relationship between age, canopy cover, environmental attributes, and multiple measures of understory diversity in early-seral logged stands compared to mature and old-growth conditions. Over the 18-yr period, canopy cover increased in early-seral stands (20 %), which transitioned into canopy closure, leading to an average loss of 11 species per plot, declines in early-seral indicator species, and increased compositional similarity to mature stands. Beta diversity was highest in early-seral stands and declined with stand age, a pattern that remained consistent across sampling periods. In old-growth stands, increases in a few shade-tolerant species drove declines in evenness and diversity, a pattern that partially aligns with expectations of increased plant cover under rising temperatures and reduced precipitation. These findings offer insight into legacy effects of clearcut logging and potentially climate change on a critical component of forest biodiversity: plantations have entered a phase of canopy closure, low species richness, and reduced diversity, while species diversity and evenness have also declined in old-growth stands.</div></div>","PeriodicalId":12350,"journal":{"name":"Forest Ecology and Management","volume":"598 ","pages":"Article 123148"},"PeriodicalIF":3.7,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Two decades of forest understory vegetation development in a 445-year chronosequence in the Siskiyou mountains of southwestern Oregon, USA","authors":"Molly B. Smith Metok ,&nbsp;Matthew J. Reilly ,&nbsp;Maureen J. Jules ,&nbsp;Erik S. Jules","doi":"10.1016/j.foreco.2025.123148","DOIUrl":"10.1016/j.foreco.2025.123148","url":null,"abstract":"<div><div>Conversion of natural forests to managed forests has reduced the amount of older, structurally diverse forests worldwide. In coniferous forests of the Pacific Northwest (USA), where understory plants represent 90 % of the species but only 1 % of forest biomass, the long-term impacts of timber harvesting remain unclear. We investigated these impacts by remeasuring a chronosequence of forests in the Siskiyou Mountains, Oregon, initially sampled in 2003. In 2021, we resurveyed 13 plots (2500 m² each), ranging from 25 to 445 years in age, to assess changes in the relationship between age, canopy cover, environmental attributes, and multiple measures of understory diversity in early-seral logged stands compared to mature and old-growth conditions. Over the 18-yr period, canopy cover increased in early-seral stands (20 %), which transitioned into canopy closure, leading to an average loss of 11 species per plot, declines in early-seral indicator species, and increased compositional similarity to mature stands. Beta diversity was highest in early-seral stands and declined with stand age, a pattern that remained consistent across sampling periods. In old-growth stands, increases in a few shade-tolerant species drove declines in evenness and diversity, a pattern that partially aligns with expectations of increased plant cover under rising temperatures and reduced precipitation. These findings offer insight into legacy effects of clearcut logging and potentially climate change on a critical component of forest biodiversity: plantations have entered a phase of canopy closure, low species richness, and reduced diversity, while species diversity and evenness have also declined in old-growth stands.</div></div>","PeriodicalId":12350,"journal":{"name":"Forest Ecology and Management","volume":"598 ","pages":"Article 123148"},"PeriodicalIF":3.7,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing regeneration dynamics post-wildfire: The role of salvage logging and site conditions in southern interior British Columbia","authors":"Felix O. Oboite ,&nbsp;Sheena Spencer","doi":"10.1016/j.foreco.2025.123178","DOIUrl":"10.1016/j.foreco.2025.123178","url":null,"abstract":"<div><div>Salvage logging is widely used after wildfires to recover economic value and facilitate regeneration, yet its effects on post-fire recovery remain uncertain. The 2003 McLure fire in southern interior British Columbia burned a landscape with diverse pre-fire stand structures, resulting in variability that may influence regeneration trajectories. Understanding how site conditions and salvage logging shape recovery is critical for informing post-fire management strategies. We assessed regeneration dynamics across two Biogeoclimatic Ecosystem Classification (BEC) zones—Interior Douglas-fir dry-cool (IDFdk) and Montane Spruce dry-mild (MSdm)—comparing salvaged stands that were mature pre-fire to unsalvaged stands that were immature before the fire. Using linear mixed-effects models, we examined the influence of salvage logging, ecological conditions, average age of the natural regeneration, stand density and time since planting on key regeneration metrics, including natural regeneration density and height, as well as quadratic mean diameter and mean height of planted trees. Salvage logging significantly increased natural regeneration densities, likely due to greater seedbed exposure and residual seed sources in salvaged stands compared to unsalvaged areas. However, salvage logging did not enhance the growth of natural or planted trees. Regeneration and growth patterns varied notably between subzones, with MSdm supporting more vigorous development than IDFdk. These results underscore the importance of accounting for pre-fire stand structure and ecological conditions when developing post-fire silvicultural strategies.</div></div>","PeriodicalId":12350,"journal":{"name":"Forest Ecology and Management","volume":"598 ","pages":"Article 123178"},"PeriodicalIF":3.7,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing regeneration dynamics post-wildfire: The role of salvage logging and site conditions in southern interior British Columbia","authors":"Felix O. Oboite ,&nbsp;Sheena Spencer","doi":"10.1016/j.foreco.2025.123178","DOIUrl":"10.1016/j.foreco.2025.123178","url":null,"abstract":"<div><div>Salvage logging is widely used after wildfires to recover economic value and facilitate regeneration, yet its effects on post-fire recovery remain uncertain. The 2003 McLure fire in southern interior British Columbia burned a landscape with diverse pre-fire stand structures, resulting in variability that may influence regeneration trajectories. Understanding how site conditions and salvage logging shape recovery is critical for informing post-fire management strategies. We assessed regeneration dynamics across two Biogeoclimatic Ecosystem Classification (BEC) zones—Interior Douglas-fir dry-cool (IDFdk) and Montane Spruce dry-mild (MSdm)—comparing salvaged stands that were mature pre-fire to unsalvaged stands that were immature before the fire. Using linear mixed-effects models, we examined the influence of salvage logging, ecological conditions, average age of the natural regeneration, stand density and time since planting on key regeneration metrics, including natural regeneration density and height, as well as quadratic mean diameter and mean height of planted trees. Salvage logging significantly increased natural regeneration densities, likely due to greater seedbed exposure and residual seed sources in salvaged stands compared to unsalvaged areas. However, salvage logging did not enhance the growth of natural or planted trees. Regeneration and growth patterns varied notably between subzones, with MSdm supporting more vigorous development than IDFdk. These results underscore the importance of accounting for pre-fire stand structure and ecological conditions when developing post-fire silvicultural strategies.</div></div>","PeriodicalId":12350,"journal":{"name":"Forest Ecology and Management","volume":"598 ","pages":"Article 123178"},"PeriodicalIF":3.7,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}