Drivers of spatial structure in thinned forests

Forest Ecosystems, Год журнала: 2024, Номер 11, С. 100182 - 100182

Опубликована: Янв. 1, 2024

As is widely known, an increasing number of forest areas were managed to preserve and enhance the health ecosystems. However, previous research on management has often overlooked importance structure-based. Our objectives define direction structure-based management. Subsequently, we investigated relationships between structure regeneration, growth, mortality trees under different thinning treatments. Ultimately, drivers structural change explored. On basis 92 sites selected from northeastern China, with recovery time (from 1 15 years) intensities (0–59.9%) since last thinning. Principal component analysis (PCA) identified among factors determining spatial structure. The equation model (SEM) was used analyze driving behind changes in after Light (0–20% removed) promoted heavy (over 35% facilitated growth. only moderate (20–35% created a reasonable While dead clustered, they hardly affected by intensity. Additionally, intensity, time, altitude indirectly improve influencing breast height (DBH) canopy area. Creating larger DBH area through will promote formation complex structures, which cultivate healthy stable forests.

Язык: Английский

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Effects of forest thinning on soil microbial biomass and enzyme activity

CATENA, Год журнала: 2024, Номер 239, С. 107938 - 107938

Опубликована: Март 1, 2024

Язык: Английский

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Thinning alters nitrogen transformation processes in subtropical forest soil: Key roles of physicochemical properties

The Science of The Total Environment, Год журнала: 2024, Номер 949, С. 175086 - 175086

Опубликована: Июль 27, 2024

Thinning-a widely used forest management practice-can significantly influence soil nitrogen (N) cycling processes in subtropical forests. However, the effects of different thinning intensities on nitrification, denitrification, and their relationships with properties microbial communities remain poorly understood. Here, we conducted a study China applied three treatments, i.e., no (0 %), intermediate (10-15 heavy (20-25 investigated intensity potential nitrification rate (PNR), denitrification (PDR), communities. Moreover, explored among physicochemical properties, community structure, transformation rates under intensities. Our results showed that increased PNR by 87 % 61 decreased PDR 31 50 compared to control, respectively. Although bacterial structure was markedly influenced thinning, fungal remained stable. Importantly, changes composition diversity had minimal impacts processes, whereas such as pH, organic carbon content, forms, were identified primary drivers. These findings highlight critical role managing regulate transformations soils. Effective should focus precisely adjusting enhance conditions, thereby promoting more efficient improving ecosystem health regions.

Язык: Английский

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Fertilization Induced Soil Microbial Shifts Show Minor Effects on Sapindus mukorossi Yield

Microorganisms, Год журнала: 2025, Номер 13(1), С. 173 - 173

Опубликована: Янв. 15, 2025

Fertilization can improve soil nutrition and increase the yield of Sapindus mukorossi, but response microbial communities to fertilization treatments their correlation with mukorossi are unclear. In order investigate characteristics physicochemical qualities bacterial community, we carried out a field experiment comparing various quantities nitrogen (N), phosphorus (P), potassium (K) fertilizers unfertilized control in raw material forests different applications try clarify interrelation among three. Results showed that (1) there significant differences effects on properties forests. The application rates or significantly reduced pH value. (2) Compared control, α-diversity was lower N3P2K2 N1P1K2 treatments. Among dominant groups bacteria at phylum level, relative abundance Chloroflexi an then decrease trend N application. Firmicutes, Bacteroidota, Fusobacteriota positively correlated P K fertilizers, while Acidobacteriota Verrucomicrobiota decreased fertilizers. (3) N2P2K2 treatment produced highest sapindus (1464.58 kg/ha), which increased by 258.67% above control. (4) Redundancy analysis (RDA) primary determinants community structure were pH, total K, effective concentration. (5) Structural equation modeling (SEM) nutrient content main direct factor driving whereas attributes (e.g., diversity structure) had minor yield. summary, rational use formulated change structure, diversity, content, latter exerting effect improvement mukorossi.

Язык: Английский

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Thinning Intensity Enhances Soil Multifunctionality and Microbial Residue Contributions to Organic Carbon Sequestration in Chinese Fir Plantations

Plants, Год журнала: 2025, Номер 14(4), С. 579 - 579

Опубликована: Фев. 14, 2025

Soil multifunctionality is essential for the enhancement of soil carbon sequestration, but disturbances such as thinning practices can influence microbial activity and cycling. Microbial residues, particularly residue (MRC), are important contributors to organic (SOC), effects intensity on MRC accumulation remain poorly understood. This study evaluated impact four treatments-control (CK, 0%), light-intensity (LIT, 20%), medium-intensity (MIT, 30%), high-intensity (HIT, 45%)-on in Chinese fir plantations five years after thinning. nutrient provision, biomass, enzyme activity, were assessed. The results showed that significantly affected provision with MIT HIT showing higher levels than CK LIT. Specifically, MIT's HIT's total increased by 0.04 0.15 compared CK. Enzyme was highest LIT (+0.89), followed (+0.07), a decline (-0.84). including bacterial PLFAs (B-PLFAs), fungal (F-PLFAs), biomass (MBC), nitrogen (MBN), MIT, lowest HIT, 0.13 increase (MRC) positively correlated (TN), available (AN), easily oxidized (EOC). content 0-20 cm layer observed (10.46 11.66 g/kg, respectively), while lower, reduced 24% 12%, respectively. These findings highlight significant role Medium-intensity 30%) identified most effective approach promoting enhancing cycling forest soils, making it an optimal management aimed at increasing sequestration.

Язык: Английский

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The Effect of Balanced N, P and K Fertilization on Fine Root Traits and Soil Properties in Sapindus mukorossi

Forests, Год журнала: 2024, Номер 15(1), С. 94 - 94

Опубликована: Янв. 3, 2024

To uncover the relationship between fine root traits and soil properties of trees under different fertilization treatments is important for understanding nutrient acquisition strategies woody oilseed plants scientific management. An experiment randomized complete block design was conducted in a Sapindus mukoross plantation using combinations nitrogen (N), phosphorus (P) potassium (K) fertilizers at levels (Control: 0 kg·ha−2 N, P K; level 1: 300 250 P, 200 2: 600 500 400 3: 900 750 K). The response to application investigated by measuring indices. results showed that: (1) surface main location roots. In 0–20 cm layer, FRB, RLD, FSRL, RAD were significantly increased treatment compared with control. (2) SOC, TN, TP, TK, AP, AK AN soils higher than those control group treatments, except pH. (3) Correlation analysis that FRB RLD positively correlated while TP AP negatively FSRL RAD. RDA content factor which influenced mukoross. study revealed K fertilizers, provided theoretical support cultivation species, suggested rational management forests, species widely planted southern region China.

Язык: Английский

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Cascade effects of forest thinning on microbial composition and function of various tree species and multiple decomposition time series: Insights from deadwood decomposition in tropical forests

Forest Ecology and Management, Год журнала: 2024, Номер 560, С. 121817 - 121817

Опубликована: Март 18, 2024

Deadwood-inhabiting bacteria and fungi were crucial in understanding ecosystem functioning carbon turnover. The objectives of this study to investigate microbial succession deadwood analyze bacterial-fungal ratio, composition, diversity various tree species; it explored fungal traits during decomposition uncovered unique networks; thinning effects on composition over three years the roles nitrogen cycle energy metabolism assessed; analysis included carbohydrate-active enzyme gene families, examining bacterial contributions organic compound degradation; impacts degrees specific families also evaluated. Deadwood samples Machilus thunbergii Quercus pachyloma time series spanning 2017, 2018, 2019 under 0%, 20%, 40%, 60%, 80% analyzed using metagenomics. results reflected stages with changes function time. Furthermore, revealed dominance groups, including Proteobacteria Actinobacteria for Ascomycota Basidiomycota fungi. This prevalence wood saprotrophs mycoparasites. fostered more networks mutualistic relationships, while encouraged antagonistic interactions. sensitivity was primarily evident at lower taxonomic levels (such as family species). genes unveiled fungi, fixation lignin degradation. Thinning significantly impacted enzymes, especially second year, influencing resource requirements metabolic decomposition. In conclusion, findings provided insights into intricate dynamics their ecological implications tropical forests. Lastly, underscored importance actively managing sustainable forests promote desired roles, thus enhancing functioning.

Язык: Английский

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Effects of thinning and ground cover plants on soil bacterial community composition and diversity in Picea asperata plantations within giant panda habitats

Journal of Plant Ecology, Год журнала: 2024, Номер 17(6)

Опубликована: Июль 30, 2024

Abstract Forest thinning and ground cover plant management play crucial roles in habitat enhancement, yet their effects on soil microbiota remain poorly understood. This study examines impact properties bacterial communities artificial spruce forests (Picea asperata) within China’s Huangtuliang ecological corridor, a for giant pandas. Thinning significantly alters pH total phosphorus (TP) levels, with minimal changes observed nitrogen (TN), microbial biomass carbon (MBC) (MBN). The combined effect of presence increases organic (SOC) to 65.47 g/kg, contrasting its absence. enhances the abundance Proteobacteria, Acidobacteria Chloroflexi while reducing Actinobacteria. Conversely, removal decreases Proteobacteria Bacteroidetes but Chloroflexi, Verrucomicrobia Rokubacteria. These lead reduced community diversity, as indicated by lower Shannon diversity index distinct composition differences demonstrated through beta-diversity analysis. Soil pH, TP MBN are maintaining structure, exhibiting strongest correlations. Network analysis confirms significant influence genera across various phyla. reveals role stochastic processes high-elevation, low-temperature corridors (R2 = 0.817), thinning’s varying depending presence, thus enhancing post-removal dispersal limitation (migration rate, m 0.96). findings highlight implications sensitive ecosystems advance our understanding dynamics critical habitats.

Язык: Английский

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Effects of Thinning Practices on Soil Properties and Arbuscular Mycorrhizal Fungi in Natural Pure Oriental Beech Forests

Forests, Год журнала: 2024, Номер 15(9), С. 1643 - 1643

Опубликована: Сен. 18, 2024

Thinning intensities in Fagus orientalis Lipsky. stands may influence the soil properties, arbuscular mycorrhizal (AM) fungi symbiosis, and their interaction through quality enhancement. We aimed to investigate impact of four thinning intensities—control (no thinning); moderate (15%), moderately intense (35%), (55%)—implemented five years ago pure oriental beech forests. In this context, percentage indicates proportion trees removed by each intensity, based on total number before thinning. Our focus encompassed physical–chemical AM community composition, root colonization. At sites, organic carbon, nitrogen, available potassium, AMF spore density, colonization increased 209.7, 88.9, 115.8, 404.9, 448.5%, respectively, when compared control sites. This suggests a potential rise density colonization—a vital aspect for natural regeneration. These findings highlight importance considering management practices forest systems that can enhance system sustainable manner improve plant performance, fertility, symbiosis with fungi.

Язык: Английский

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Advances in molecular genetics have increased knowledge of Tuber species’ life cycle and population genetic structure, indicating ways to improve yield

Mycorrhiza, Год журнала: 2024, Номер 35(1)

Опубликована: Дек. 13, 2024

Язык: Английский

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