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Rational eucalypt logging site management patterns enhance soil phosphorus bioavailability and reshape phoD-harboring bacterial community structure
IF 3.7 2区 农林科学
Forest Ecology and Management Pub Date : 2024-11-30 DOI: 10.1016/j.foreco.2024.122434
Yuxing Xu, Chao Li, Zhichao Wang, Runxia Huang, Apeng Du, Wankuan Zhu
{"title":"Rational eucalypt logging site management patterns enhance soil phosphorus bioavailability and reshape phoD-harboring bacterial community structure","authors":"Yuxing Xu,&nbsp;Chao Li,&nbsp;Zhichao Wang,&nbsp;Runxia Huang,&nbsp;Apeng Du,&nbsp;Wankuan Zhu","doi":"10.1016/j.foreco.2024.122434","DOIUrl":"10.1016/j.foreco.2024.122434","url":null,"abstract":"<div><div>Continuous planting of eucalypt plantations negatively affects soil nutrient effectiveness, especially soil phosphorus (P) availability. Therefore, exploring the response characteristics of soil P-mineralising microbial communities and the distribution mechanism of soil P fractions under different transformation patterns on eucalypts logging sites holds great practical significance for improving soil nutrient effectiveness in plantations. This experiment investigated the effects and correlations between four different transformation patterns on soil phoD-harboring bacterial communities, alkaline phosphatase (ALP) activity, and P fractions. Management patterns mainly included non-forest area formed upon eucalypt stump germination suppression after two generations of <em>Eucalyptus</em> afforestation (TWE), the third generation of pure plantation planting (THE), mixing of <em>Eucalyptus</em> with <em>Manglietia glauca</em> (EM), and rotation of pure <em>M. glauca</em> plantation (MM), with previous mixed coniferous and broadleaf forest (CK) as the control. The results showed that, TWE and THE significantly reduced soil (0–10 cm and 10–20 cm) organic carbon (SOC), total nitrogen (TN), bioavailable P, and labile Po, and increased the occluded P and ALP activity compared to CK; however, SOC, TN, bioavailable P, and labile Po indices improved in plantations of EM or MM compared to TWE and THE. Meanwhile, the four management patterns on the logging site caused significant differences in phoD gene community structure and diversity. TWE and THE significantly increased the relative abundances (RAs) of Pseudomonadaceae and Comamonadaceae, which correlated negatively with soil bioavailable P and HCl-P and positively with ALP activity, suggesting a positive effect on Po mineralization and insoluble P mobilization. In contrast, Streptomycetaceae and Oxalobacteraceae were significantly enriched in EM or MM, implying that not all microorganisms carrying phoD genes play important roles in synthesizing ALP. The structure equation model showed that TN, resin-Pi, NaHCO<sub>3</sub>-Pi, and HCl-P had indirect effects on ALP through phoD-harbouring bacterial diversity and community composition. These findings provide a basis for understanding the soil P cycling mechanism after eucalypt plantations logging site transformation.</div></div>","PeriodicalId":12350,"journal":{"name":"Forest Ecology and Management","volume":"578 ","pages":"Article 122434"},"PeriodicalIF":3.7,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745887","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}
引用次数: 0
Long-term impacts of nurse plants on evergreen and deciduous oak saplings in Northern California
IF 3.7 2区 农林科学
Forest Ecology and Management Pub Date : 2024-11-30 DOI: 10.1016/j.foreco.2024.122426
Chrysanthe Frangos , Rodolfo Dirzo , Marta Peláez
{"title":"Long-term impacts of nurse plants on evergreen and deciduous oak saplings in Northern California","authors":"Chrysanthe Frangos ,&nbsp;Rodolfo Dirzo ,&nbsp;Marta Peláez","doi":"10.1016/j.foreco.2024.122426","DOIUrl":"10.1016/j.foreco.2024.122426","url":null,"abstract":"<div><div>Throughout California, oak savannas exhibit poor recruitment of saplings in natural populations. To prevent the decline of California oak (<em>Quercus</em> spp.) populations, management practices need to elucidate the drivers of recruitment limitations. Previous research suggests that nurse plants enhance the establishment of oaks by buffering them from stressors such as insolation and herbivory. However, their long-term effects on sapling performance remain poorly known. Here we explore the differential impacts of nurse plants on the growth and distribution of sympatric evergreen and deciduous oak species. We compared all naturally occurring saplings found underneath and around nurse plants in two environments with contrasting densities of herbivorous mule deer (<em>Odocoileus hemionus</em>) in 2015 and 2023. The nurse plants and oaks observed in 2015 were located and evaluated after eight years, along with all new oak saplings recruited between 2015 and 2023. We uncovered that beneficiary oaks protected by nurse plants had greater height growth compared to those exposed in the open. Additionally, increased herbivory stress is associated with a shift in the distribution of beneficiaries underneath the nurse plant, favoring recruitment closer to the nurse plant’s center. We conclude that nurse plants are only beneficial to the long-term growth of oak saplings under high herbivory scenarios. As nurse plants are not as effective facilitators for deciduous species compared to evergreen ones, further research devoted to management solutions for deciduous oak species is warranted.</div></div>","PeriodicalId":12350,"journal":{"name":"Forest Ecology and Management","volume":"577 ","pages":"Article 122426"},"PeriodicalIF":3.7,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743874","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}
引用次数: 0
Contrasting responses of bats and macro-moths to structural complexity in forest borders
IF 3.7 2区 农林科学
Forest Ecology and Management Pub Date : 2024-11-30 DOI: 10.1016/j.foreco.2024.122416
Heather Wood , Adam Kimberley , Sara A.O. Cousins
{"title":"Contrasting responses of bats and macro-moths to structural complexity in forest borders","authors":"Heather Wood ,&nbsp;Adam Kimberley ,&nbsp;Sara A.O. Cousins","doi":"10.1016/j.foreco.2024.122416","DOIUrl":"10.1016/j.foreco.2024.122416","url":null,"abstract":"<div><div>Habitat fragmentation increases the proportion of forest borders in the landscape and many forest borders lose their structural complexity due to modern forestry practices. However, remnants of structurally complex deciduous forests can remain as ecotones between plantations and agricultural fields. In this study we used terrestrial laser scanning to measure structural complexity of different forest borders, measured microclimate, and surveyed bats and macro-moths to understand how these taxa are affected. Our aim is to disentangle the main drivers, direct or indirect, that influence bat and moth assemblages. We studied 79 forest borders, and surrounding landscapes and compared them with adjacent agricultural fields and coniferous plantations. Overall, we found less bat activity and lower macro-moth diversity in simple compared to complex borders. Using structural equation modelling, we show the contrasting responses of forest-specialist bats and moths to structural complexity; with bats responding positively and moths negatively. We found similar divergent results in relation to understorey openness; with increasing forest-specialist bat activity but a lower diversity of forest-specialist moths in more open borders. Understorey vegetation also appears to regulate microclimate with more open borders being warmer and less humid. This has a potential knock-on effect for bats as they favoured borders that were warmer and more humid. Surrounding land-cover was more important than structural complexity for generalist species; with increasing generalist bat activity due to a higher proportion of local deciduous forest cover and increasing generalist moth diversity in landscapes with more forest borders. Overall, these complex relationships between forest structure, microclimate and landscape factors, coupled with divergent responses of both taxa highlight their diverse ecological needs. Therefore, we highlight the importance of managing forest borders to retain complexity and connectivity within multifunctional landscapes.</div></div>","PeriodicalId":12350,"journal":{"name":"Forest Ecology and Management","volume":"578 ","pages":"Article 122416"},"PeriodicalIF":3.7,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multi-scale forest heterogeneity promotes occupancy of dusky-footed woodrats in the Sierra Nevada
IF 3.7 2区 农林科学
Forest Ecology and Management Pub Date : 2024-11-30 DOI: 10.1016/j.foreco.2024.122412
Corbin C. Kuntze , Jonathan N. Pauli , John J. Keane , Kevin N. Roberts , Brian P. Dotters , H. Anu Kramer , M. Zachariah Peery
{"title":"Multi-scale forest heterogeneity promotes occupancy of dusky-footed woodrats in the Sierra Nevada","authors":"Corbin C. Kuntze ,&nbsp;Jonathan N. Pauli ,&nbsp;John J. Keane ,&nbsp;Kevin N. Roberts ,&nbsp;Brian P. Dotters ,&nbsp;H. Anu Kramer ,&nbsp;M. Zachariah Peery","doi":"10.1016/j.foreco.2024.122412","DOIUrl":"10.1016/j.foreco.2024.122412","url":null,"abstract":"<div><div>Forested landscapes are naturally heterogeneous, with the distribution of resources influencing animal habitat selection at multiple spatial scales. However, anthropogenic activities and changing disturbance regimes have reorganized how forests are structured from fine- to landscape-scales, generally with unknown consequences for forest-associated wildlife. For instance, fire suppression and selective logging in the western US has led to more homogeneous forests with fewer small patches of early-successional vegetation. As forest management aims to improve forest resilience to extreme fire and drought by restoring historical disturbance regimes and modifying forest structure through fuel management, there is a need for studies that evaluate how animals respond to forest heterogeneity at multiple scales. Here, we estimated occupancy for the dusky-footed woodrat (<em>Neotoma fuscipes</em>), an important prey species for many forest predators including the California spotted owl (<em>Strix occidentalis occidentalis</em>), relative to forest structure and composition at site-, patch-, and landscape-scales within landscapes where forest heterogeneity was created by even-aged timber management. Woodrats were more likely to occupy sites with greater canopy cover, understory cover, and hardwoods – particularly tanoak (<em>Notholithocarpus densiflorus</em>) – and smaller patches of young forest. Woodrats were also more likely to occupy mature forests in close proximity to younger forests, suggesting that young forest patches with more favorable local conditions can produce populations that recruit into adjacent, lower-quality mature forests. Our results suggest that creating small (∼2 ha) patches of high-quality woodrat habitat (i.e., young forests with dense understory and hardwoods) could provide “fishing holes” for spotted owls and other predators by supporting higher woodrat densities in surrounding mature forests managed for fuels – thus helping to meet both spotted owl conservation and forest resilience objectives. More broadly, we highlight the benefits of multi-scale studies and demonstrate that restoring landscape heterogeneity, including the creation of small early-successional forests, may benefit species conservation without compromising efforts to improve resilience in forest ecosystems globally.</div></div>","PeriodicalId":12350,"journal":{"name":"Forest Ecology and Management","volume":"578 ","pages":"Article 122412"},"PeriodicalIF":3.7,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745964","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}
引用次数: 0
Consistent growth responses of silver fir (Abies alba Mill.) and European beech (Fagus sylvatica L.) to drought in mixed and monospecific forests: Insights from Central European forests
IF 3.7 2区 农林科学
Forest Ecology and Management Pub Date : 2024-11-29 DOI: 10.1016/j.foreco.2024.122415
Piotr Gbur , Piotr Wrzesiński , Marcin Klisz , Jernej Jevšenak , Marzena Niemczyk , Stanisław Drozdowski
{"title":"Consistent growth responses of silver fir (Abies alba Mill.) and European beech (Fagus sylvatica L.) to drought in mixed and monospecific forests: Insights from Central European forests","authors":"Piotr Gbur ,&nbsp;Piotr Wrzesiński ,&nbsp;Marcin Klisz ,&nbsp;Jernej Jevšenak ,&nbsp;Marzena Niemczyk ,&nbsp;Stanisław Drozdowski","doi":"10.1016/j.foreco.2024.122415","DOIUrl":"10.1016/j.foreco.2024.122415","url":null,"abstract":"<div><div>Ongoing climate change, characterized by an increased frequency of extreme weather events, including severe droughts, negatively impacts forest ecosystems. However, tree responses differ across tree species and stand composition (mixtures vs. pure stands), which may serve as an important management strategy for forest adaptation to climate change. To investigate the effect of stand composition on drought resilience, we conducted research on forest ecosystems in the Polish Outer Carpathians at the eastern edge of the distribution range of two important European tree species, silver fir (<em>Abies alba</em>) and European beech (<em>Fagus sylvatica</em>). The aim of our study was to identify climatic factors influencing the growth of these species and to examine their drought sensitivity and productivity. For this purpose, we sampled 100 fir and 100 beech trees from both mixed and monospecific stands. We applied a dendroclimatological approach to determine temporal stability of climate–growth relationships. Lloret’s resilience indices were used to quantify the response of tree growth to episodic drought stress, while to derive differences in productivity, we applied the generalized additive mixed models (GAMMs). Our results showed species specific climate sensitivity which remain consistent regardless of mixture only for fir. Fir responded positively to higher temperatures, especially during spring, but required more precipitation, particularly in summer. Beech exhibited lower sensitivity to climate in mixed than in monospecific stands and exhibited higher resistance than fir. Importantly, species responses to droughts were driven by the duration of specific drought event and the timing in which it occurred. Furthermore, our results revealed that mixed stands were more resistant to extreme drought events. Fir showed higher resistance to extreme drought events in mixed stands than in pure stands. Overall, silver fir exhibited higher productivity than European beech. Especially in younger cohorts, it was higher for pure stands, but fir from mixed stands exhibited increasing productivity with age and delayed culmination. Our findings indicate that both species can form resilient stands in the studied region, making them viable for forest management in the face of climate change. Mixtures of fir and beech are particularly valid option to promote forest sustainability and productivity in mountain regions. Managed mixed stands of <em>Abies alba</em> and <em>Fagus sylvatica</em> demonstrated advantages in productivity and stability under extreme drought conditions. However, varying intensities of management interventions and structural differences between stands and among studies complicate direct comparisons, highlighting the need for more standardized approaches to analyzing species responses and management strategies in the future.</div></div>","PeriodicalId":12350,"journal":{"name":"Forest Ecology and Management","volume":"577 ","pages":"Article 122415"},"PeriodicalIF":3.7,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743876","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}
引用次数: 0
Root rot increases the vulnerability of Norway spruce trees to Ips typographus infestation 根腐病使挪威云杉更容易受到 Ips typographus 的侵袭
IF 3.7 2区 农林科学
Forest Ecology and Management Pub Date : 2024-11-27 DOI: 10.1016/j.foreco.2024.122409
W. Wahlman , R. Kasanen , L. Lappalainen , J. Honkaniemi
{"title":"Root rot increases the vulnerability of Norway spruce trees to Ips typographus infestation","authors":"W. Wahlman ,&nbsp;R. Kasanen ,&nbsp;L. Lappalainen ,&nbsp;J. Honkaniemi","doi":"10.1016/j.foreco.2024.122409","DOIUrl":"10.1016/j.foreco.2024.122409","url":null,"abstract":"<div><div>Norway spruce (<em>Picea abies</em>) is one of the most economically important tree species in Northern and Central Europe. Root rot caused by <em>Heterobasidion annosum</em> s.l. and the European spruce bark beetle (<em>Ips typographus</em>) are major disturbance agents of Norway spruce and are expected to increasingly affect spruce-dominated forests as the climate warms. This study investigated the direct interaction between root rot and <em>I. typographus</em>, with the aim of examining whether root rot and the stress it causes to a tree increases the risk of subsequent bark beetle attack.</div><div>In total, 442 Norway spruce trees from nine different mature, even-aged forest stands were studied. First, symptoms caused by <em>I. typographus</em> were evaluated before final felling from each tree based on visual assessments of crown and stem conditions. After the felling, the sample plots were relocated from the clearcut areas, and the stumps of sampled trees were reassessed for root rot. Exploratory analysis and binomial Generalized Linear Mixed Model (GLMM) were used to analyze relationships between explanatory variables and their effect to <em>I. typographus</em> infestation.</div><div>The best predictors for <em>I. typographus</em> infestation at individual tree level were presence of root rot and to a lesser extent, tree diameter at breast height. Seventy-five percent of root rot-infected trees were also infested with <em>I. typographus</em>, and most of those trees were either dead or severely infested. Results suggest that root rot weakens trees, making them more vulnerable to subsequent <em>I. typographus</em> infestation, especially early in outbreaks when bark beetle population densities are low.</div></div>","PeriodicalId":12350,"journal":{"name":"Forest Ecology and Management","volume":"577 ","pages":"Article 122409"},"PeriodicalIF":3.7,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142721542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tree size and site environment affects sessile oak growth and intrinsic water-use efficiency response to wet-dry years 树木大小和地点环境影响无梗栎树的生长和对干湿年的内在用水效率反应
IF 3.7 2区 农林科学
Forest Ecology and Management Pub Date : 2024-11-26 DOI: 10.1016/j.foreco.2024.122413
Kathiravan Meeran , Michael Grabner , Katharina Schott , Elisabeth Wächter , Marcela van Loo , Andrea Watzinger
{"title":"Tree size and site environment affects sessile oak growth and intrinsic water-use efficiency response to wet-dry years","authors":"Kathiravan Meeran ,&nbsp;Michael Grabner ,&nbsp;Katharina Schott ,&nbsp;Elisabeth Wächter ,&nbsp;Marcela van Loo ,&nbsp;Andrea Watzinger","doi":"10.1016/j.foreco.2024.122413","DOIUrl":"10.1016/j.foreco.2024.122413","url":null,"abstract":"<div><div>Drought is a significant global environmental stressor that impacts tree growth and survival, often causing substantial die-offs in temperate forests. Hence, contemporary forest management strategies increasingly aim to transition from spruce-dominated to mixed forest with more climate-resilient species such as oaks. Sessile oak (<em>Quercus petraea</em> (Matt.) Liebl.), a key forest tree species, is widespread across central Europe, but its response to climate extremes, especially individual intraspecific variability, remains poorly understood. In this study, we analysed tree-ring cores from 404 sessile oak trees in Thayatal National park, Austria. We assessed radial growth through tree-ring width and evaluated intrinsic water-use efficiency (iWUE) by analyzing δ<sup>13</sup>C in latewood from wet (1987) and dry (1994) years. Further, we investigated the effects of site conditions, specifically light and water status inferred from potential daylight duration and the topographic wetness index (TWI), on key tree characteristics such as diameter at breast height (DBH), height, and the height-to-diameter ratio (HDR). We then examined how these factors affected iWUE and radial growth under wet and dry years, assessing radial growth's resistance, resilience, and recovery. As expected, iWUE was increased and radial growth was decreased during the dry year compared to the wet year, but there was high intraspecific variability. Tree age and size influenced these responses; age positively affected growth during the dry year, followed by decreased drought recovery. Increased daylight duration improved iWUE and reduced growth during the dry year but supported drought recovery. During the dry year, iWUE positively affected growth and resistance to drought. The TWI correlated with increased tree height and DBH but did not affect iWUE and growth responses under extreme years. Our findings suggest promoting mixed-age stands could enhance forest resilience against drought. Moreover, forest management strategies should integrate specific environmental conditions, including light availability and water status, to effectively mitigate impact of climate extremes.</div></div>","PeriodicalId":12350,"journal":{"name":"Forest Ecology and Management","volume":"577 ","pages":"Article 122413"},"PeriodicalIF":3.7,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142721423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The influence of fire and termites on tree hollow development in an Australian tropical savanna 火灾和白蚁对澳大利亚热带稀树草原树洞发育的影响
IF 3.7 2区 农林科学
Forest Ecology and Management Pub Date : 2024-11-26 DOI: 10.1016/j.foreco.2024.122403
Ellen Rochelmeyer , Brett P. Murphy , Shaun R. Levick , Alyson M. Stobo-Wilson , Anna E. Richards
{"title":"The influence of fire and termites on tree hollow development in an Australian tropical savanna","authors":"Ellen Rochelmeyer ,&nbsp;Brett P. Murphy ,&nbsp;Shaun R. Levick ,&nbsp;Alyson M. Stobo-Wilson ,&nbsp;Anna E. Richards","doi":"10.1016/j.foreco.2024.122403","DOIUrl":"10.1016/j.foreco.2024.122403","url":null,"abstract":"<div><div>Tree hollows are important habitat resources for wildlife globally. In the tropical savannas of northern Australia, the abundance of tree hollows is influenced by both fire and termites. With the regular application of prescribed fire in these ecosystems, it is important to understand the implications of fire management on important habitat resources – especially when applied over the long-term. This study uses a long-term fire experiment (18 years of applied fire treatments) with targeted termite and tree hollow surveys to investigate how the proportion of stem hollowing and abundance of hollow entrances are affected by termites and different long-term fire regimes. We used sonic tomography in a novel application to non-destructively estimate tree stem hollowing. Trunk diameter was identified as the strongest predictor of both stem hollowing and hollow entrance abundance, with larger trees having a greater proportion of the stem hollowing and greater number of hollow entrances. The proportion of stem hollowing tended to be greater closer to the base of the tree, and the number of hollow entrances was greater in <em>Eucalyptus miniata</em> than <em>E. tetrodonta</em>. While the proportion of stem that was hollowed did not influence the number of hollow entrances, the presence of any hollowing at 1.3 m was associated with more hollow entrances. We did not detect an effect of fire activity on stem hollowing or the abundance of hollow entrances at the individual tree level, and it may be that these effects are only detectable at the stand level due to changes in tree demographics with varying fire regimes. As large trees tend to have more hollow entrances, management to promote habitat for wildlife should focus on fire regimes that avoid the loss of large trees in the landscape.</div></div>","PeriodicalId":12350,"journal":{"name":"Forest Ecology and Management","volume":"577 ","pages":"Article 122403"},"PeriodicalIF":3.7,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142721422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Determining the effects of reduced water availability on seed germination of five bottomland hardwood tree species 确定水分供应减少对五种底层硬木树种种子萌发的影响
IF 3.7 2区 农林科学
Forest Ecology and Management Pub Date : 2024-11-26 DOI: 10.1016/j.foreco.2024.122410
Charles J. Pell , Sammy L. King , Tracy Hawkins , Matt Symmank
{"title":"Determining the effects of reduced water availability on seed germination of five bottomland hardwood tree species","authors":"Charles J. Pell ,&nbsp;Sammy L. King ,&nbsp;Tracy Hawkins ,&nbsp;Matt Symmank","doi":"10.1016/j.foreco.2024.122410","DOIUrl":"10.1016/j.foreco.2024.122410","url":null,"abstract":"<div><div>Globally, floodplain forests are experiencing shifts in species composition associated with drier conditions and disruptions of flood pulse hydrology. The specific processes behind these shifts in composition are not fully understood, but differential effects of drought on regeneration processes such as seed germination may be partially responsible. To determine how reduced water availability impacts seed germination of different floodplain tree species, a lab-controlled germination experiment was conducted. Seeds from tree species common to floodplain forests of the southeastern and southcentral United States whose abundance have been altered by drier hydrogeomorphic conditions were examined. These seeds included desiccation resistant, or orthodox, seeds of sugarberry (<em>Celtis laevigata</em>) and green ash (<em>Fraxinus pennsylvanica</em>), and desiccation sensitive, or recalcitrant, acorns of overcup oak (<em>Quercus lyrata</em>), water oak (<em>Quercus nigra</em>), and willow oak (<em>Quercus phellos</em>). Seeds of each species were incubated with one of eight osmotically adjusted water solutions ranging in water potential from 0.0 MPa to −1.4 MPa. This reduction in water potential decreases the water available to the seeds for germination. After four weeks, seed germination of all species decreased with reduced water potential; however, desiccation tolerance did not correspond with the ability to germinate under lower water potential. Orthodox seeds only germinated in higher water potential treatments. Sugarberry reached 30 % germination in only the control 0.0 MPa treatment while green ash reached 30 % germination in treatments as low as −0.4 MPa. In contrast, recalcitrant acorns continued to germinate under lower water potentials. Water oak maintained 30 % or greater germination under all treatments and willow oak reached 30 % down to −0.8 MPa. Overcup oak was the only species to not respond to water potential treatment. With respect to maximum germination, sugarberry and green ash reached maximum germination an average of 9 days sooner than the oak species. The results of this study agree with others that demonstrate that seed germination success is sensitive to environmental water conditions and that species specific differences in germination traits are linked to broader life history strategies that are adaptive to common environmental conditions in their range.</div></div>","PeriodicalId":12350,"journal":{"name":"Forest Ecology and Management","volume":"577 ","pages":"Article 122410"},"PeriodicalIF":3.7,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142721424","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}
引用次数: 0
Towards the construction of a seed traits database for restoration of subtropical seasonally dry ecosystems: Effects of light, temperature and seed storage on germination 为恢复亚热带季节性干旱生态系统建立种子性状数据库:光照、温度和种子储藏对萌发的影响
IF 3.7 2区 农林科学
Forest Ecology and Management Pub Date : 2024-11-26 DOI: 10.1016/j.foreco.2024.122390
Ana E. Ferreras , Paula Venier , Paula I. Marcora , Paula A. Tecco , Guillermo Funes , Melisa A. Giorgis , Fernando A. Gallará , Sebastián R. Zeballos
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