Effects of changing riparian topography on the decline of ecological indicators along the drawdown zones of long rivers in China

Frontiers in Forests and Global Change, Год журнала: 2024, Номер 7

Опубликована: Янв. 19, 2024

Riparian topographical features can drive a suite of ecological indicators (EIs) that shape the river ecosystem. The mechanisms EIs reflect provide several ecosystem services. We know little about responses (indicators plant cover, regeneration, exotics, habitat, erosion, and stressors) to changing stream-channel width, riparian elevation lengthy drawdown zones (upstream, midstream, downstream) long rivers. have discovered characteristics affect buffer areas differently by using rapid field-based method with 297 transects in inundated regions along Yangtze River other 36 linked tributaries China. Changing widths was most effective on downstream least at midstream. exotic parameters were affected (with range −0.36 < r 0.401) widths, as determined Pearson correlation ( p 0.05). In contrast, width had uppermost impact upstream lowermost downstream; significant habitat ≤ 0.787). followed pattern negatively associated exotics −0.645 −0.594) positively correlated regeneration 0.569). These results reaffirm imperative need for studies regionally dependent maintained under same management strategies regardless their features. Future policies should be formulated enhance service provision, promoting sustainable use extensive ecosystems while considering EIs. Additionally, these future acknowledge zone factors within network. Furthermore, additional measures are conserve prevent further destruction.

Язык: Английский

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Patterns and drivers of plant carbon, nitrogen, and phosphorus stoichiometry in a novel riparian ecosystem

Frontiers in Plant Science, Год журнала: 2024, Номер 15

Опубликована: Апрель 8, 2024

Carbon (C), nitrogen (N), and phosphorus (P) stoichiometry serve as valuable indices for plant nutrient utilization biogeochemical cycling within ecosystems. However, the allocation of these nutrients among different organs underlying drivers in dynamic riparian ecosystems remain inadequately understood. In this study, we gathered samples from diverse life forms (annuals perennials) (leaves, stems, roots) zone Three Gorges Reservoir Region (TGRR) China—a novel ecosystem subject to winter flooding. We used random forest analysis structural equation modeling find out how flooding, forms, communities, soil variables affect C, N, P levels. Results showed that mean concentrations TGRR were 386.65, 19.31, 5.27 mg/g leaves respectively, 404.02, 11.23, 4.81 stems 388.22, 9.32, 3.27 roots respectively. The C:N, C:P N:P ratios 16.15, 191.7 5.56 respectively; 26.98, 273.72 4.6 16.63, 223.06 4.77 Riparian plants exhibited limitation, with weak carbon sequestration, low efficiency, a high capacity uptake. Plant C:N:P was significantly across organs, higher N than roots, annuals perennials. While flooding stress triggered distinct responses annual perennial plants, they maintained similar stoichiometric along gradients. Furthermore, our investigation identified properties more influential factors communities shaping variations organs. Flooding indirectly impacts primarily through alterations community composition factors. This study underscores potential hydrologic changes influence dynamics, further alter ecological strategies

Язык: Английский

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Examining the stoichiometry of C:N:P:K in the dynamics of foliar-litter-soil within dominant tree species across different altitudes in southern China

Global Ecology and Conservation, Год журнала: 2024, Номер 51, С. e02885 - e02885

Опубликована: Март 5, 2024

Ecological stoichiometry assessment provides insight into the interactions between foliar-litter-soil dynamics among dominant tree species and facilitates their conservation. However, little research has been carried out on such trends within mixed forest ecosystems in national nature reserves globally. The present study fills this knowledge gap by examining ecological of at various altitudes desirable southern China. This concentrates six representative plant communities, each pivotal maintaining carbon (C), nitrogen (N), phosphorus (P), potassium (K) balances, along with energy flows. selected communities encompass two plantations comprising Cunninghamia lanceolata Phyllostachys edulis four natural forests, including evergreen broad-leaved (Manglietia conifera), deciduous (Daphniphyllum macropodum Acer davidii), consisting Fagus longipetiolata, coniferous (Tsuga chinensis). Furthermore, involved measurement C, N, P, K contents foliage, litter, soil. outcomes revealed significant variations foliar, soil stoichiometric attributes across communities. Correlation analysis highlighted substantial positive associations N P foliar litter components, while exhibited insignificance. Broad-leaved forests generally displayed higher leaf compared to forests. exceptions observed content M. conifera D. F. longipetiolata. high-altitude T. chinensis one highest ratios. Notably, demonstrated richness but deficiency K, impacting growth limiting availability. Additionally, low hindered decomposition. nutrient ratios other nutrients remained relatively stable except for C: which were consistent homeostasis theory. These findings provide scientific evidence cycle regulation, ecosystem protection, valuable insights complex relationships

Язык: Английский

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Evolutionary analysis of ecological-production-living space-carrying capacity in tourism-centric traditional villages in Guangxi, China

Journal of Environmental Management, Год журнала: 2025, Номер 375, С. 124182 - 124182

Опубликована: Янв. 22, 2025

Язык: Английский

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Assessing the conjunction of environmental sustainability and tourism development along Chinese waterways

Ecological Indicators, Год журнала: 2024, Номер 166, С. 112281 - 112281

Опубликована: Июнь 25, 2024

The complex interplay between tourism expansion and environmental conservation responsibilities necessitates the adoption of sustainable practices in aquatic ecosystems around world. Still, existing scholarly investigations predominantly focus on dynamics individual rivers, resulting considerable gaps our comprehension large river network systems. To redress these gaps, this study examines potential effects development sustainability Yangtze River its tributaries China. Furthermore, it evaluates government support interventions aimed at strengthening while proposing specific improvements. In 2023, a comprehensive survey involving 982 stakeholders provided invaluable insights into multilayered nexus sustainability. We analyzed carefully gathered data from thoughtfully designed questionnaire using rigorous reliability assessments, correlation analyses, regression techniques. Cronbach's alpha coefficients ranging 0.83 to 0.95 results, indicating robust reliability. findings reveal positive correlations governmental sustainability, with visitor management showing strongest (r = 0.66**). analysis reveals that contribute both economic (R2 0.61 ∼ R2 0.77, ΔR2 16) 0.51 0.62, 11) Thus, highlights importance intervention achieving Therefore, advocates coordinated approach maximize policy formulation implementation benefits. This provides actionable for researchers, stakeholders, policymakers alike promote practices.

Язык: Английский

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Artificially remediated plants impact soil physiochemical properties along the riparian zones of the three gorges dam in China

Frontiers in Forests and Global Change, Год журнала: 2024, Номер 7

Опубликована: Фев. 2, 2024

River ecosystem biodiversity and biogeochemical processes are shaped largely by riverside vegetation soil. Moreover, river ecosystems provide ecological services influenced the surrounding soil interactions. However, mechanisms which artificially remediated plants (ARPs) riparian interact to these benefits still unclear among various ARPs. This study fills this gap examines impact of ARPs along zones Three Gorges Dam (TGD) in Chongqing City, China. We sampled four varieties from Ruxi Basin TGD. These included Cynodon dactylon , Hemarthria altissima Taxodium disticum Salix mastudana . Our results indicated substantial changes physicochemical parameters. Comparably, T. distigum contains significantly higher chemical contents. Interestingly, principal component analysis explained almost 100% variance for all plant species study. different types properties were positively correlated using Pearson correlation ( p < 0.05). Furthermore, exhibited strong negative correlations with physical characteristics (up r = −1.00). Specifically, explain interactions between areas Hence, may facilitate restoration land management degraded areas.

Язык: Английский

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Spatial and temporal divergence and driving mechanisms of carbon sinks in terrestrial ecosystems in the middle reaches of the Yangtze River urban agglomerations during 2008–2020

Ecological Indicators, Год журнала: 2024, Номер 165, С. 112205 - 112205

Опубликована: Июнь 4, 2024

Urban cluster carbon sinks are key parts of the terrestrial cycle, and play an important role in global climate change. Based on inversion results net ecosystem productivity (NEP) Middle Reaches Yangtze River Agglomeration (MRYRUA), this study considered influence both natural environmental socioeconomic factors NEP, investigated driving mechanism sink emphasizing spatial temporal heterogeneity by geographically temporally weighted regression model (GTWR). Results demonstrated that (1) During 2008–2020, annual average NEP was positive MRYRUA, effect increased. (2) In Precipitation DEM were positively correlated with sinks, opposite for temperature, percentage water areas population density. (3) period, factors, such as temperature precipitation grew gradually weaker, whereas The urbanization rate, night lights index industrial structure changed from negative to positive, while built-up area had increasing NEP. conclusions above, proposed differentiated policy implications, including improving vegetation hydrothermal environment, controlling urban expansion accelerating transformation. It would provide empirical inspiration attaining peak carbon, neutrality, sustainable development goals.

Язык: Английский

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Dam inundation reduces ecosystem multifunctionality following riparian afforestation in the Three Gorges Reservoir Region

Journal of Environmental Management, Год журнала: 2024, Номер 360, С. 121188 - 121188

Опубликована: Май 17, 2024

Язык: Английский

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How willing is the public to spread green behavior? Evidence from the voluntary provision experiment of public goods

Current Psychology, Год журнала: 2024, Номер unknown

Опубликована: Сен. 6, 2024

Язык: Английский

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Genetic variability and population divergence of Rhododendron platypodum Diels in China in the context of conservation

Frontiers in Forests and Global Change, Год журнала: 2024, Номер 7

Опубликована: Март 14, 2024

Genetic diversity in endangered species is of special significance the face escalating global climate change and alarming biodiversity declines. Rhododendron platypodum Diels, an endemic to China, distinguished by its restricted geographical range. This study aimed explore genetic differentiation among populations, gathering samples from all four distribution sites: Jinfo Mountain (JFM), Zhaoyun (ZYM), Baima (BMM), Mao’er (MEM). We employed 18 pairs Simple Sequence Repeat (SSR) primers ascertain structural characteristics these further utilized 19 phenotypic data points corroborate observed populations. These detected 52 alleles, with average number alleles ( Na ) being 2.89, effective Ne 2.12, heterozygosity Ho 0.57, expected He 0.50. array demonstrates efficacy reflecting R. ’s diversity. SSR-based analysis populations yielded , Shannon index I values ranging 0.47 0.65, 0.36 0.46, 0.53 0.69, respectively. Notably, ZYM population emerged as most genetically diverse. Further analysis, incorporating molecular variance, principal component UPGMA cluster structure highlighted significant between Chongqing (BMM, JFM, ZYM) Guangxi (MEM) Morphological corroborated findings. Additionally, marked morphological distinctions were evident three ZYM). suggests that, despite regional differentiation, overall relatively constrained compared other within genus. Consequently, conservation hinges critically on preserving protecting distinct

Язык: Английский

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