The dynamics of bacterial communities during leaf decomposition of various species combinations in riparian forest buffers in China

Forest Ecology and Management, Journal Year: 2025, Volume and Issue: 584, P. 122607 - 122607

Published: March 2, 2025

Language: Английский

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Understory Vegetation Regulated the Soil Stoichiometry in Cold-Temperate Larch Forests

Plants, Journal Year: 2025, Volume and Issue: 14(7), P. 1088 - 1088

Published: April 1, 2025

Carbon (C), nitrogen (N), and phosphorus (P) are vital nutrients in the soil, exerting a profound influence on primary productivity of ecosystems. However, our understanding how understory influences soil their stoichiometry remains limited, especially cold-temperate forests where plays crucial role mediating nutrient cycling. To elucidate effect vegetation nutrients, three typical larch forests, namely Sphagnum-Bryum-Rhododendron tomentosum-Larix gmelinii forest (SLL), Rhododendron dauricum-Larix (RL), (LL), were selected region northeast China to determine organic carbon (SOC), total (TN), (TP) contents, stoichiometric characteristics 0-100 cm depth. The results revealed following: (1) Significant differences its existed among different types (p < 0.001), with SLL displaying highest mean SOC, TN, TP as well C:N, C:P, N:P ratios, whereas RL exhibited lowest values 0.05). (2) Across profile, content showed decreasing trends depth, significant layers. (3) Variations significantly correlated bulk density, pH, temperature, water content, porosity, capillary porosity This study underscores necessity further consideration impact future research

Language: Английский

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Altitudinal patterns of soil and microbial C:N:P stoichiometry in subtropical forests in Daming Mountain, South China

Frontiers in Earth Science, Journal Year: 2025, Volume and Issue: 13

Published: April 7, 2025

Introduction Altitude-induced variations in hydrothermal conditions and vegetation affect the carbon (C), nitrogen (N), phosphorus (P) contents both soil microbial biomass. However, specific patterns of changes these nutrients their stoichiometry response to altitudinal remain unclear. Methods In this study, we analyzed biomass C:N:P across three layers (0–20, 20–40, 40–60 cm) subtropical mountain ecosystems on Daming Mountain, South China. Results Our results revealed that C content C:N ratio 0–20 cm layer initially increased then decreased with increasing altitude. Meanwhile, P decreased. Soil altitude all layers, whereas C:P N:P ratios exhibited opposite trends. For along gradient, growth was mainly restricted by P, limitation being more pronounced at mid-to-low altitudes. C, N, were positively correlated ratios, available N (AN), (AP), water (SWC), but negatively bulk density, pH temperature. contrast, stoichiometric or non-significant relationships factors. Notably, AN, AP, SWC dominant factors affecting stoichiometry. Discussion These findings contribute understanding nutrient responses environmental ecosystems.

Language: Английский

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High nutrient utilization and resorption efficiency promote bamboo expansion and invasion

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 362, P. 121370 - 121370

Published: June 1, 2024

Language: Английский

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Ecological-economic assessment of forest land degradation neutrality in the Indus River Basin of Pakistan

Environment Development and Sustainability, Journal Year: 2024, Volume and Issue: unknown

Published: July 10, 2024

Language: Английский

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Leaf functional traits of Daphniphyllum macropodum across different altitudes in Mao’er Mountain in Southern China

Frontiers in Forests and Global Change, Journal Year: 2024, Volume and Issue: 7

Published: July 17, 2024

Investigating functional traits among mountain species with differing altitude requirements is integral to effective conservation practices. Our study aims investigate the structural and chemical characteristics of Daphniphyllum macropodum leaves at three altitudes (1100 m, 1300 1500 m) across southern China provide insight into changes in leaf (LFT) as well plant adaptations response changing environmental conditions. Leaf include thickness (LT), area (LA), specific (SLA), tissue density (LD), respectively, while properties carbon-nitrogen-phosphorus (C:N:P) contents ratios, such C/N, C/P, N/P. findings demonstrated significant effect on both (LT, SLA, LD) aspects (N, N/P) LFT. In particular, 1100 m differed greatly, having lower SLA values than m. Observable trends included an initial increase followed by a decline rose. Notable them were LT, LD, N, N/P locations. Traits significantly higher m; C/N displayed inverse trend, their lowest occurring Furthermore, this research various degrees variation LFT, exhibiting greater fluctuation traits. Robust correlations observed certain traits, SLA. interdependency relationships between N P interconnectedness. Redundancy analysis indicated that soil factors, specifically content, exerted strongest impact At D. employed acquisition strategies; however, strategies emerged, showing shift from conservative ones.

Language: Английский

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Seasonal dynamics of soil ecosystems in the riparian zones of the Three Gorges Reservoir, China

Global Ecology and Conservation, Journal Year: 2024, Volume and Issue: 54, P. e03174 - e03174

Published: Sept. 2, 2024

Riparian soils, together with vegetation, play a crucial role in supporting biodiversity and driving biogeochemical processes within river ecosystems. Conservation of riparian soils artificial planting are essential for ecosystem recovery following land degradation. Researchers focus on examining soil nutrients, microbial biomass, organic acid metabolism the interactions between plants along riverbanks. However, seasonal responses to plantations have been infrequently reported existing literature. This study investigates influence variations conditions growth artificially planted species zones Three Gorges Dam Reservoir (TGDR) China. The sampled include Cynodon dactylon, Hemarthria altissima, Salix matsudana. These provide valuable insight into properties zones, assessing across different seasons: T1 (spring), T2 (summer), T3 (autumn). results demonstrated significant changes matter, ammonium nitrogen, nitrate other indicators T3. Apart from invertase activity H. altissima soil, enzyme peaked during T1. Dominant bacteria were examined using high-throughput 16S rDNA sequencing, revealing that available belong 62 phyla 211 classes. Among most abundant Proteobacteria Actinobacteria, averaging over 60% all samples. Principal component analyses accounted 62.81% (T1), 50.57% (T2), 54.08% (T3) variation observed study, indicating predominantly influenced by phases, assuming factors remained constant. Pearson correlation analysis (p < 0.05) identified strong positive correlations physical three plant (r ≤ 0.94), as well negative bacterial communities -1.00). findings suggest selected well-suited cultivation zone TGDR. enhances our understanding dynamics environments, offering practical insights their management.

Language: Английский

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Conservation Implications of Vegetation Characteristics and Soil Properties in Endangered Mangrove Scyphiphora hydrophyllacea on Hainan Island, China

Sustainability, Journal Year: 2024, Volume and Issue: 17(1), P. 191 - 191

Published: Dec. 30, 2024

Scyphiphora hydrophyllacea is an endangered mangrove species in China. Over-exploitation and coastal development have drastically reduced its distribution population, now limited to the Qingmei Port (Sanya) Qinglan (Wenchang). Despite critical status, research on ecological roles remains limited. This study examines characteristics of S. communities their relationship with soil properties. A total 17 from 11 families 14 genera were recorded. TWINSPAN classification identified two distinct community types: community. Significant biodiversity differences found only tree layer, no shrub or herbaceous layers. The importance value within arbor layer exhibited variability across communities, serving as associated a dominant community, suggesting potential barriers natural regeneration. Redundancy analysis (RDA) revealed that key factors influencing hydrophyllacea’s include electrical conductivity (EC), phosphorus (TP), nitrogen (TN), organic content (SOC), carbon/nitrogen ratio (C/N). We propose high salinity deficiency may act limiting regeneration hydrophyllacea.

Language: Английский

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Морфологічні особливості лісової підстилки старовікових лісів на природно-заповідних територіях Західних регіонів України

Scientific Bulletin of UNFU, Journal Year: 2024, Volume and Issue: 34(8)

Published: Dec. 23, 2024

Досліджено морфологічні особливості лісової підстилки корінних деревостанів стиглої та перестійної вікових груп (старовікові ліси), що відповідають природному типу лісорослинних умов. Дослідження виконано на території трьох національних природних парків "Сколівські Бескиди", "Бойківщина", Ківерцівського національного природного парку "Цуманська пуща" заповіднику "Розточчя". За результатами проведених досліджень встановлено, запаси у весняний період в листяних лісах за участі бука явора змінюються межах 16,16-18,16 т·га⁻¹ (НПП "Бойківщина"), грабово-дубовому лісостані – 12,0 (Ківерцівський НПП пуща"). У лісових екосистемах, сформованих ялицево-буково-ялиновомими деревостанами Бескиди"), є дещо вищими 24,2 т·га⁻¹, і дубово-буковому сосняку заповідника "Розточчя" від 31,5 т·га⁻¹. більшості досліджуваних підстилок старовікових лісів діагностуються три підгоризонти L, F H, рідше два ‒ L + H. запасах частка представлена свіжим опадом, становить 21-35 %. Дещо більшу частку займає підгоризонт 32-45 Цей горизонт формує напіврозкладене листя, хвоя, гілки плоди. Підгоризонт Н (28-47 %) детрит, який залежить складу деревних порід, висоти н.р.м. кількісного видового організмів-деструкторів, активно беруть участь розкладі підстилки. фракційному складі здебільшого переважає активна фракція (листя, детрит). Неактивну фракцію формують плоди, а їх 22-40 Зроблений детальніший аналіз фракційного підгоризонтами виявив, детриту відсутня, тоді як підгоризонті не облікуються фракції листя хвої. Зазвичай сформований детритом напіврозкладеними гілками плодами, переважно більших розмірів. З'ясовано, підстилках з незначною потужністю (менше 2 см) важко виокремити підгоризонти. більше 2-3 см добре Н.

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