Forest Ecosystems最新文献_第10页

Mitigating drought stress in European beech and pedunculate oak: The role of competition reduction 减轻欧洲山毛榉和有梗橡树的干旱压力：减少竞争的作用

IF 3.8 1区农林科学 Q1 FORESTRY

Forest Ecosystems

Pub Date : 2025-08-01 Epub Date: 2025-02-08 DOI: 10.1016/j.fecs.2025.100303

Sanne Verdonck , Anneleen Geussens , Roman Zweifel , Arno Thomaes , Koenraad Van Meerbeek , Bart Muys

Droughts pose significant threats to forest ecosystems globally. Effective forest management strategies, adapted to local conditions, are needed to mitigate negative drought impacts. One proposed strategy is competition reduction to increase water availability and, as a result, alleviate drought stress. This study investigates the effect of competition intensity on drought stress and tree growth in European beech (Fagus sylvatica) and pedunculate oak (Quercus robur). We deployed 72 point dendrometers, placed along a competition intensity gradient, in National Park Brabantse Wouden (Belgium), to measure daily minimum tree water deficit (TWD_min) as a drought stress proxy and daily radial growth at tree level. Our results revealed species-dependent effects of competition intensity (CI). For European beech, competition reductions positively influenced growth and alleviated (1 < CI < 2) or aggravated (CI < 0.5) drought stress. For pedunculate oak, competition intensity did not affect drought stress or growth along the investigated gradient. Environmental variables consistently affected TWD_min and growth of both species. Precipitation reduced TWD_min and increased growth, while vapor pressure deficit led to opposite trends. Thus, environmental conditions and competition can play a critical role in forest dynamics, especially in light of climate change. However, reducing competition through increased management efforts does not seem to be a one-size-fits-all solution to alleviating drought stress. Additionally, there seems to be a trade-off between reducing drought stress and improving tree growth in European beech: tree growth continuously benefited from competition reductions, while under low competition (CI < 0.5) drought stress increased. Revisiting or reviving long-term thinning intensity trials encompassing various regions, species, and soil types will be needed to gain comprehensive insights into mitigating drought stress through management interventions under different local stand conditions.

干旱对全球森林生态系统构成重大威胁。需要适应当地条件的有效森林管理战略来减轻干旱的负面影响。一项提议的战略是减少竞争以增加水的可用性，从而减轻干旱压力。研究了竞争强度对欧洲山毛榉（Fagus sylvatica）和有花序栎（Quercus robur）干旱胁迫和树木生长的影响。我们在Brabantse Wouden国家公园（比利时）沿竞争强度梯度放置了72个点树木计，以测量树木的日最小水分亏缺（TWDmin）作为干旱胁迫的代理和树木水平的日径向生长。我们的研究结果揭示了竞争强度（CI）的物种依赖效应。对于欧洲山毛榉，竞争减少对生长有积极影响，并缓解了(1 <；CI & lt;2)或加重(CI <；0.5)干旱胁迫。对有花序栎来说，竞争强度对干旱胁迫和生长没有影响。环境变量始终影响两种物种的TWDmin和生长。降水减少TWDmin，增加生长，而蒸汽压亏缺导致相反的趋势。因此，环境条件和竞争可以在森林动态中发挥关键作用，特别是在气候变化的情况下。然而，通过加强管理努力来减少竞争似乎并不是缓解干旱压力的一刀切的解决办法。此外，减少干旱胁迫和改善欧洲山毛榉树木生长之间似乎存在一种权衡关系：树木生长持续受益于竞争减少，而在低竞争(CI <；0.5)干旱胁迫加重。重新审视或恢复包括不同地区、物种和土壤类型的长期间伐强度试验，将需要获得通过不同当地林分条件下的管理干预来缓解干旱压力的全面见解。

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引用次数: 0

Nonlinear multilevel seemingly unrelated height-diameter and crown length mixed-effects models for the southern Transylvanian forests, Romania 罗马尼亚南部特兰西瓦尼亚森林的非线性多层看似无关的高径和冠长混合效应模型

IF 3.8 1区农林科学 Q1 FORESTRY

Forest Ecosystems

Pub Date : 2025-08-01 Epub Date: 2025-03-11 DOI: 10.1016/j.fecs.2025.100322

Albert Ciceu , Ştefan Leca , Ovidiu Badea , Lauri Mehtätalo

In this study, we used an extensive sampling network established in central Romania to develop tree height and crown length models. Our analysis included more than 18,000 tree measurements from five different species. Instead of building univariate models for each response variable, we employed a multivariate approach using seemingly unrelated mixed-effects models. These models incorporated variables related to species mixture, tree and stand size, competition, and stand structure. With the inclusion of additional variables in the multivariate seemingly unrelated mixed-effects models, the accuracy of the height prediction models improved by over 10% for all species, whereas the improvement in the crown length models was considerably smaller. Our findings indicate that trees in mixed stands tend to have shorter heights but longer crowns than those in pure stands. We also observed that trees in homogeneous stand structures have shorter crown lengths than those in heterogeneous stands. By employing a multivariate mixed-effects modelling framework, we were able to perform cross-model random-effect predictions, leading to a significant increase in accuracy when both responses were used to calibrate the model. In contrast, the improvement in accuracy was marginal when only height was used for calibration. We demonstrate how multivariate mixed-effects models can be effectively used to develop multi-response allometric models that can be easily calibrated with a limited number of observations while simultaneously achieving better-aligned projections.

在这项研究中，我们使用在罗马尼亚中部建立的广泛采样网络来开发树高和树冠长度模型。我们的分析包括来自五个不同物种的18000多棵树的测量数据。我们没有为每个响应变量建立单变量模型，而是采用了一种使用看似不相关的混合效应模型的多变量方法。这些模型纳入了与物种混合、树和林分大小、竞争和林分结构有关的变量。在多变量混合效应模型中加入其他变量后，所有树种的高度预测精度提高了10%以上，而冠长模型的精度提高幅度较小。结果表明，混交林的树冠比纯林分的树冠长，树高短。同质林分结构的树冠长度比异质林分的树冠长度短。通过采用多变量混合效应建模框架，我们能够进行跨模型随机效应预测，从而在使用两种反应来校准模型时显著提高准确性。相比之下，当仅使用高度进行校准时，精度的提高是微不足道的。我们展示了多元混合效应模型如何有效地用于开发多响应异速生长模型，该模型可以轻松地用有限数量的观测进行校准，同时获得更好的对齐预测。

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引用次数: 0

Enhancing stem volume estimation for savanna species using variable-exponent taper equation and close-range photogrammetry 利用变指数锥度方程和近景摄影测量加强热带稀树草原物种茎体积估算

IF 3.8 1区农林科学 Q1 FORESTRY

Forest Ecosystems

Pub Date : 2025-08-01 Epub Date: 2025-04-11 DOI: 10.1016/j.fecs.2025.100331

Finagnon Gabin Laly, Gilbert Atindogbe, Gbèdonou Michée Amos Sohou, Hospice Afouda Akpo, Noël Houédougbé Fonton

Stem volume estimation is crucial in forest ecology and management, particularly for timber harvesting strategies and carbon stock assessments. This study aimed to develop a variable-exponent taper equation specifically tailored to savanna tree species using close-range photogrammetry (CRP) data and to evaluate its performance against conventional volume equations for stem volume estimation. A dataset of 30 trees across five dominant savanna species was used to fit the taper model, which was validated using a separate dataset of 322 trees from 14 species. The results demonstrated significant improvements in volume estimation accuracy when using the taper equation. At the tree level, the root mean square error (RMSE) decreased by 47%, from 598 to 319 dm³, and the mean absolute bias (MAB) by 48%, from 328 to 172 dm³, compared to volume equations. Similarly, at the plot level, RMSE was reduced by 42% and MAB by 40%. The model performed well for species with regular forms. However, species with irregular tapers exhibited higher errors, reflecting the challenges of modeling stem forms of mixed species. The use of CRP proved valuable, providing high-resolution diameter measurements that improved model parameterization. This study underscores the importance of advanced data collection methods for enhancing taper model accuracy and suggests that further species-specific adjustments are needed to improve performance for species with irregular forms. The findings support the broader application of taper equations for improving stem volume estimates in savanna ecosystems, contributing to better forest management and resource monitoring practices.

茎体积估算对森林生态和管理至关重要，特别是对木材采伐战略和碳储量评估。本研究旨在利用近距离摄影测量（CRP）数据建立一个专门针对热带草原树种的变指数锥度方程，并评估其与传统体积方程的性能。研究人员使用了5个主要稀树草原物种的30棵树的数据集来拟合锥度模型，并使用了来自14个物种的322棵树的单独数据集来验证该模型。结果表明，当使用锥度方程时，体积估计精度显着提高。与体积方程相比，在树的水平上，均方根误差（RMSE）从598 dm3下降到319 dm3，降低了47%，平均绝对偏差（MAB）从328 dm3下降到172 dm3，降低了48%。同样，在地块水平上，RMSE降低42%，MAB降低40%。该模型对规则形态的物种表现良好。然而，具有不规则锥度的物种表现出更高的误差，反映了混合物种的茎形态建模的挑战。CRP的使用证明是有价值的，它提供了高分辨率的直径测量，改进了模型参数化。该研究强调了先进的数据收集方法对提高锥度模型准确性的重要性，并表明需要进一步的物种特异性调整来提高不规则形状物种的表现。研究结果支持更广泛地应用锥度方程来改善热带草原生态系统的茎体积估算，有助于改善森林管理和资源监测实践。

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引用次数: 0

Adaptive optimisation of the management of Korean pine plantation 红松人工林管理的适应性优化

IF 3.8 1区农林科学 Q1 FORESTRY

Forest Ecosystems

Pub Date : 2025-08-01 Epub Date: 2025-03-30 DOI: 10.1016/j.fecs.2025.100326

Qianping Tong , Xingji Jin , Timo Pukkala , Lihu Dong , Fengri Li

Forest management planning faces uncertainties regarding future timber prices, tree growth, and survival. Future seed production is an additional source of uncertainty in Korean pine stands managed for the joint production of timber and edible seeds. Modern forest planning uses optimisation to determine the best possible cutting schedule. Optimisation can accommodate uncertainty by using decision rules for adaptive forest management instead of optimising cutting years and intensities. In this study, we optimised two adaptive decision rules for managing Korean pine plantations for the joint production of timber and pinecones when timber prices, tree growth, and seed production are stochastic. The first rule indicated the minimum price to sell timber, i.e., the reservation price, as a function of the mean tree diameter and stand basal area. The second adaptive rule expressed the mean tree diameter at which cutting is optimal as a function of timber price and stand basal area. Both decision rules resulted in nearly the same mean net present value when the optimised rule was applied to 100 stochastic scenarios for future timber prices, tree growth, and seed production. The net present values were over 20% higher than those for the deterministically optimised cutting schedules under the same scenarios. Therefore, the expected economic gain from switching from deterministic to adaptive stochastic optimisation was at least 20%. The cutting years of the adaptive optima were frequently later than those indicated by the deterministic optima, and optimal adaptive harvesting often involved waiting for high timber prices. The minimum price or minimum mean diameter to sell timber was higher when the income from seeds was considered in the optimisation. The cuttings were later, and the rotations were longer in the joint production of timber and pinecones than in timber production alone.

森林管理规划面临着未来木材价格、树木生长和存活率方面的不确定性。未来的种子产量也是韩国松林管理中的一个不确定因素，因为韩国松林既要生产木材，又要生产可食用的种子。现代森林规划采用优化方法来确定最佳的砍伐计划。优化可以通过使用适应性森林管理的决策规则来适应不确定性，而不是优化砍伐年限和强度。在这项研究中，我们优化了两个适应性决策规则，用于管理韩国松树人工林，在木材价格、树木生长和种子生产都是随机的情况下，共同生产木材和松果。第一条规则表示出售木材的最低价格，即保留价，它是平均树径和林分基部面积的函数。第二种自适应规则将伐木最佳的平均树径表示为木材价格和林分基部面积的函数。将优化规则应用于未来木材价格、树木生长和种子产量的 100 种随机情景时，两种决策规则产生的平均净现值几乎相同。在相同情况下，净现值比确定性优化砍伐计划高出 20% 以上。因此，从确定性优化到自适应随机优化的预期经济收益至少为 20%。自适应优化的砍伐年份往往晚于确定性优化的砍伐年份，自适应优化砍伐往往需要等待高木材价格。在优化过程中考虑种子收入时，出售木材的最低价格或最小平均直径会更高。与单独生产木材相比，联合生产木材和松果的伐木时间更晚，轮伐期更长。

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引用次数: 0

Design strategy of advanced generation breeding population of Pinus tabuliformis based on genetic variation and inbreeding level 基于遗传变异和近交水平的油松高代繁殖群体设计策略

IF 3.8 1区农林科学 Q1 FORESTRY

Forest Ecosystems

Pub Date : 2025-08-01 Epub Date: 2025-03-01 DOI: 10.1016/j.fecs.2025.100320

Chengcheng Zhou , Fan Sun , Zhiyuan Jiao , Yousry A. El-Kassaby , Wei Li

The level of genetic variation within a breeding population affects the effectiveness of selection strategies for genetic improvement. The relationship between genetic variation level within Pinus tabuliformis breeding populations and selection strategies or selection effectiveness is not fully investigated. Here, we compared the selection effectiveness of combined and individual direct selection strategies using half- and full-sib families produced from advanced-generation P. tabuliformis seed orchard as our test populations. Our results revealed that, within half-sib families, average diameter at breast height (DBH), tree height, and volume growth of superior individuals selected by the direct selection strategy were higher by 7.72%, 18.56%, and 31.01%, respectively, than those selected by the combined selection strategy. Furthermore, significant differences (P < 0.01) were observed between the two strategies in terms of the expected genetic gains for average tree height and volume. In contrast, within full-sib families, the differences in tree average DBH, height, and volume between the two selection strategies were relatively minor with increase of 0.17%, 2.73%, and 2.21%, respectively, and no significant differences were found in the average expected genetic gains for the studied traits. Half-sib families exhibited greater phenotypic and genetic variation, resulting in improved selection efficiency with the direct selection strategy but also introduced a level of inbreeding risk. Based on genetic distance estimates using molecular markers, our comparative seed orchard design analysis showed that the Improved Adaptive Genetic Programming Algorithm (IAPGA) reduced the average inbreeding coefficient by 14.36% and 14.73% compared to sequential and random designs, respectively. In conclusion, the combination of the direct selection strategy with IAPGA seed orchard design aimed at minimizing inbreeding offered an efficient approach for establishing advanced-generation P. tabuliformis seed orchards.

育种群体内的遗传变异水平影响遗传改良选择策略的有效性。油松育种群体遗传变异水平与选择策略或选择效果之间的关系尚未得到充分研究。本研究以来自油油树种子园的半同胞和全同胞家庭作为试验群体，比较了组合和个体直接选择策略的选择效果。结果表明，在半同胞家系中，采用直接选择策略的优势个体胸径、树高和体长分别比采用联合选择策略的优势个体高7.72%、18.56%和31.01%。此外，显著差异(P <；在平均树高和平均树积的预期遗传增益方面，两种策略的差异均为0.01)。在全同胞家系中，两种选择策略在树平均胸径、树高和树体积上的差异相对较小，分别增加了0.17%、2.73%和2.21%，所研究性状的平均预期遗传增益无显著差异。半同胞家庭表现出更大的表型和遗传变异，从而提高了直接选择策略的选择效率，但也引入了一定程度的近交风险。基于分子标记的遗传距离估算结果表明，改进的自适应遗传规划算法（IAPGA）与随机设计相比，平均近交系系数分别降低了14.36%和14.73%。综上所述，将直接选择策略与以减少近亲繁殖为目标的IAPGA种子园设计相结合，是建立先进一代油油树种子园的有效途径。

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引用次数: 0

How to determine the leaf area index (LAI) of forests: A comparison of forest inventory versus satellite-driven estimates 如何确定森林的叶面积指数（LAI）：森林清查与卫星估算的比较

IF 3.8 1区农林科学 Q1 FORESTRY

Forest Ecosystems

Pub Date : 2025-08-01 Epub Date: 2025-04-11 DOI: 10.1016/j.fecs.2025.100332

Muhammed Sinan, Hubert Hasenauer

Leaf area index (LAI) is a key measure of forest stand physiology and biomass production, and is essential within ecosystem modeling. There are two common approaches to obtaining LAI: (i) terrestrial forest inventory-based “bottom–up”, and (ii) satellite-based “top–down” techniques. The purpose of this study is to compare terrestrial LAI from allometric functions applied to more than 30,000 trees of the Austrian National Forest Inventory (NFI) vs. satellite-based LAI estimates obtained from moderate resolution imaging spectroradiometer (MODIS) and Sentinel (Sentinel-3 TOC reflectance and PROBA-V) data across Austrian forests. We analyzed a satellite pixel-to-plot aggregation and obtained the full inventory data set for the LAI comparison. The results suggest that terrestrial vs. satellite (MODIS and Sentinel) driven LAI estimates are consistent, but (i) the variation of the terrestrial forest inventory LAI is larger vs. the pixel average LAI from satellite data, and (ii) any satellite LAI estimation needs a forest stand density correction if the crown competition factor (CCF), a measure for stand density, is < 250 to avoid an overestimation in LAI.

叶面积指数（LAI）是林分生理和生物量生产的重要指标，在生态系统建模中具有重要意义。获取LAI有两种常见方法：(i)基于陆地森林清查的“自下而上”技术和（ii）基于卫星的“自上而下”技术。本研究的目的是比较奥地利国家森林调查（NFI）中3万多棵树木的异速生长函数与奥地利森林中中分辨率成像光谱辐射计（MODIS）和Sentinel （Sentinel-3 TOC反射率和PROBA-V）数据获得的基于卫星的LAI估计值。我们分析了卫星像素到图的聚合，并获得了用于LAI比较的完整清单数据集。结果表明，陆地和卫星（MODIS和Sentinel）驱动的LAI估计值是一致的，但(i)陆地森林清盘LAI的变化大于卫星数据的像元平均LAI，（ii）任何卫星LAI估计值都需要对林分密度进行校正，如果测量林分密度的树冠竞争因子（CCF）为<；250，以避免LAI的高估。

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引用次数: 0

Recreational and aesthetic values of forest landscapes (RAFL): Quantifying management impacts and trade-offs with provisioning and regulatory ecosystem services 森林景观的娱乐和美学价值：量化管理影响和与供应和调节生态系统服务的权衡

IF 3.8 1区农林科学 Q1 FORESTRY

Forest Ecosystems

Pub Date : 2025-08-01 Epub Date: 2025-02-20 DOI: 10.1016/j.fecs.2025.100318

Dagm Abate , Brigite Botequim , Susete Marques , Constantino Lagoa , Juan Guerra Hernández , Geerten Hengeveld , Marjanke Hoogstra-Klein , José G. Borges

Cultural ecosystem services (CES), which encompass recreational and aesthetic values, contribute to human well-being and yet are often underrepresented in forest management planning due to challenges in quantifying these services. This study introduces the Recreational and Aesthetic Values of Forested Landscapes (RAFL) index, a novel framework combining six measurable recreational and aesthetic components: Stewardship, Naturalness, Complexity, Visual Scale, Historicity, and Ephemera. The RAFL index was integrated into a Linear Programming (LP) Resource Capability Model (RCM) to assess trade-offs between CES and other ecosystem services, including timber production, wildfire resistance, and biodiversity. The approach was applied in a case study in Northern Portugal, comparing two forest management scenarios: Business as Usual (BAU), dominated by eucalyptus plantations, and an Alternative Scenario (ALT), focused on the conversion to native species: cork oak, chestnut, and pedunculate oak. Results revealed that the ALT scenario consistently achieved higher RAFL values, reflecting its potential to enhance CES, while also supporting higher biodiversity and wildfire resilience compared to the BAU scenario. Results highlighted further that management may maintain steady timber production and wildfire regulatory services while addressing concerns with CES. This study provides a replicable methodology for quantifying CES and integrating them into forest management frameworks, offering actionable insights for decision-makers. The findings highlight the effectiveness of the approach in designing landscape mosaics that provide CES while addressing the need to supply provisioning and regulatory ecosystem services.

文化生态系统服务（CES）包括娱乐和审美价值，有助于人类福祉，但由于在量化这些服务方面存在挑战，因此在森林管理规划中往往代表性不足。本文介绍了森林景观的娱乐和美学价值指数（RAFL），这是一个新的框架，结合了六个可测量的娱乐和美学成分：管理，自然性，复杂性，视觉规模，历史性和短暂性。将RAFL指数整合到线性规划（LP）资源能力模型（RCM）中，以评估CES与其他生态系统服务（包括木材生产、野火抗性和生物多样性）之间的权衡。该方法在葡萄牙北部的一个案例研究中得到应用，比较了两种森林管理情景：以桉树人工林为主的“一切照旧”（BAU）和侧重于向本地物种（栓皮栎、栗子和有柄橡树）转化的“替代情景”（ALT）。结果表明，与BAU情景相比，ALT情景持续获得更高的RAFL值，反映了其增强CES的潜力，同时也支持更高的生物多样性和野火恢复能力。结果进一步强调，管理部门可以在解决CES问题的同时保持稳定的木材生产和野火监管服务。本研究提供了一种可复制的方法，用于量化森林消费环境并将其纳入森林管理框架，为决策者提供可操作的见解。研究结果强调了该方法在设计景观马赛克时的有效性，该方法在解决供应和监管生态系统服务的需求的同时提供了CES。

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引用次数: 0

Utilizing quantile regressions to predict vertical distribution of branch size in Larix olgensis Henry: Capturing the differentiated responses of varying branch sizes to stand and tree factors 利用分位数回归预测长白落叶松枝长垂直分布：捕捉不同枝长对林分和乔木因子的差异响应

IF 3.8 1区农林科学 Q1 FORESTRY

Forest Ecosystems

Pub Date : 2025-08-01 Epub Date: 2025-01-28 DOI: 10.1016/j.fecs.2025.100300

Zheng Miao , Fengri Li , Xuehan Zhao , Yumeng Jiang , Lihu Dong

Branch size is a crucial characteristic, closely linked to both tree growth and wood quality. A review of existing branch size models reveals various approaches, but the ability to estimate branch diameter and length within the same whorl remains underexplored. In this study, a total of 77 trees were sampled from Northeast China to model the vertical distribution of branch diameter and length within each whorl along the crown. Several commonly used functions were taken as the alternative model forms, and the quantile regression method was employed and compared with the classical two-step modeling approach. The analysis incorporated stand, tree, and competition factors, with a particular focus on how these factors influence branches of varying sizes. The modified Weibull function was chosen as the optimal model, due to its excellent performance across all quantiles. Eight quantile regression curves (ranging from 0.20 to 0.85) were combined to predict branch diameter, while seven curves (ranging from 0.20 to 0.80) were used for branch length. The results showed that the quantile regression method outperformed the classical approach at model fitting and validation, likely due to its ability to estimate different rates of change across the entire branch size distribution. Lager branches in each whorl were more sensitive to changes in

DBH

, crown length (

CL

), crown ratio (

CR

) and dominant tree height (

H_{dom}

), while slenderness (

HDR

) more effectively influenced small and medium-sized branches. The effect of stand basal area (

BAS

) was relatively consistent across different branch sizes. The findings indicate that quantile regression is a good way not only a more accurate method for predicting branch size but also a valuable tool for understanding how branch growth responds to stand and tree factors. The models developed in this study are prepared to be further integrated into tree growth and yield simulation system, contributing to the assessment and promotion of wood quality.

树枝的大小是一个至关重要的特征，与树木生长和木材质量密切相关。对现有分支大小模型的回顾揭示了各种方法，但在同一螺纹内估计分支直径和长度的能力仍未得到充分探索。本研究以东北地区77棵乔木为研究对象，模拟了各轮内树枝直径和长度沿树冠的垂直分布。采用几种常用函数作为备选模型形式，采用分位数回归方法，并与经典的两步建模方法进行比较。分析包括林分、乔木和竞争因素，特别关注这些因素如何影响不同大小的树枝。由于改进的威布尔函数在所有分位数上都表现优异，因此选择其作为最优模型。8条分位数回归曲线（范围为0.20 ~ 0.85）用于预测枝径，7条分位数回归曲线（范围为0.20 ~ 0.80）用于预测枝长。结果表明，分位数回归方法在模型拟合和验证方面优于经典方法，可能是因为它能够估计整个分支大小分布的不同变化率。各轮大枝对胸径、冠长（CL）、冠比（CR）和优势树高（Hdom）的变化更为敏感，而细细度（HDR）对中小枝的影响更为有效。不同枝长对林分基面积的影响相对一致。结果表明，分位数回归不仅是一种准确预测树枝大小的方法，而且是了解树枝生长对林分和乔木因子响应的有价值的工具。本研究建立的模型可以进一步集成到树木生长和产量模拟系统中，为木材质量的评估和提升做出贡献。

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引用次数: 0

Trends in alpha diversity, community composition, and network complexity of rare, intermediate, and abundant bacterial taxa along a latitudinal gradient and their impact on ecosystem multifunctionality 稀有、中等和丰富细菌类群α多样性、群落组成和网络复杂性沿纬度梯度的变化趋势及其对生态系统多功能性的影响

IF 3.8 1区农林科学 Q1 FORESTRY

Forest Ecosystems

Pub Date : 2025-08-01 Epub Date: 2025-03-11 DOI: 10.1016/j.fecs.2025.100323

Rong Tang , Shuaifeng Li , Xiaobo Huang , Rui Zhang , Cong Li , Jianrong Su

Soil microbial communities are key factors in maintaining ecosystem multifunctionality (EMF). However, the distribution patterns of bacterial diversity and how the different bacterial taxa and their diversity dimensions affect EMF remain largely unknown. Here, we investigated variation in three measures of diversity (alpha diversity, community composition and network complexity) among rare, intermediate, and abundant taxa across a latitudinal gradient spanning five forest plots in Yunnan Province, China and examined their contributions on EMF. We aimed to characterize the diversity distributions of bacterial groups across latitudes and to assess the differences in the mechanisms underlying their contributions to EMF. We found that multifaceted diversity (i.e., diversity assessed by the three different metrics) of rare, intermediate, and abundant bacteria generally decreased with increasing latitude. More importantly, we found that rare bacterial taxa tended to be more diverse, but they contributed less to EMF than intermediate or abundant bacteria. Among the three dimensions of diversity we assessed, only community composition significantly affected EMF across all locations, while alpha diversity had a negative effect, and network complexity showed no significant impact. Our study further emphasizes the importance of intermediate and abundant bacterial taxa as well as community composition to EMF and provides a theoretical basis for investigating the mechanisms by which belowground microorganisms drive EMF along a latitudinal gradient.

土壤微生物群落是维持生态系统多功能性的关键因素。然而，细菌多样性的分布模式以及不同细菌分类群及其多样性维度如何影响EMF仍然是未知的。本文以云南省5个样地为研究对象，研究了稀有、中等和丰富类群的α多样性、群落组成和网络复杂性的变化，并分析了它们对EMF的影响。我们的目的是表征跨纬度细菌群的多样性分布，并评估它们对电磁场的贡献机制的差异。我们发现，稀有、中等和丰富细菌的多方面多样性（即通过三种不同指标评估的多样性）通常随着纬度的增加而降低。更重要的是，我们发现稀有细菌类群倾向于更加多样化，但它们对EMF的贡献小于中等或丰富的细菌。在我们评估的多样性的三个维度中，只有群落组成显著影响所有地点的EMF，而alpha多样性具有负向影响，网络复杂性没有显著影响。本研究进一步强调了中间和丰富的细菌类群及其群落组成对电磁场的重要性，并为研究地下微生物沿纬度梯度驱动电磁场的机制提供了理论基础。

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引用次数: 0

Corrigendum to “Topographic complexity drives trait composition as well as functional and phylogenetic diversity of understory plant communities in microrefugia: New insights for conservation” [Forest Ecosyst. 12 (2025) 100278] “地形复杂性驱动微保护区林下植物群落特征组成以及功能和系统发育多样性：保护的新见解”[森林生态系统，12 (2025)100278]

IF 3.8 1区农林科学 Q1 FORESTRY

Forest Ecosystems

Pub Date : 2025-08-01 Epub Date: 2025-02-26 DOI: 10.1016/j.fecs.2025.100307

Kata Frei , Anna E-Vojtkó , Csaba Tölgyesi , András Vojtkó , Tünde Farkas , László Erdős , Gábor Li , Ádám Lőrincz , Zoltán Bátori

引用次数: 0