Journal of Vegetation Science最新文献

{"title":"Controls on use efficiency of plant nutrients along subtropical to alpine gradients on the Tibetan Plateau","authors":"Ying Guo,&nbsp;Lin Zhang,&nbsp;Wei Shen,&nbsp;Yanhong Tang,&nbsp;Tianxiang Luo","doi":"10.1111/jvs.13245","DOIUrl":"https://doi.org/10.1111/jvs.13245","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Question</h3>\u0000 \u0000 <p>Knowledge of how nutrient use strategies differ between forest trees and alpine shrubs/grasses is important to understand the mechanisms of vegetation changes from montane forests to alpine shrubs/grasslands along altitudinal gradients. We tested the hypothesis that, to maximize the nitrogen use efficiency (NUE) of canopy production, forest trees tend to have a higher mean residence time (MRT) of nitrogen in the plants through increased leaf life span, whereas alpine shrublands and grasslands tend to have higher nitrogen productivity through increased below-ground biomass fraction. We further tested whether similar patterns are found in phosphorus use efficiency (PUE).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Twenty-one sampling sites along Tibetan Alpine Vegetation Transects (TAVT) at altitudes from 1900 m to 4900 m.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We measured the maximum biomass of new canopy leaves and twigs and the concentrations of their nutrients N and P and associated ecosystem variables along the TAVT. NUE (PUE) was calculated as the product of nutrient productivity (dry matter production per unit N or P in new canopy leaves and twigs) and MRT (the ratio of foliage nutrient pool to annual nutrient uptake).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>With increasing altitude, leaf life span increased in forest trees but decreased in shrublands and grasslands, while below-ground fraction increased when vegetation changed from montane forests to alpine shrubs/grasslands. In forest trees, higher N-MRT and P-MRT and lower P productivity were associated with longer leaf life span and lower below-ground fraction, while N productivity varied little. In alpine shrublands and grasslands, N-MRT, P-MRT and P productivity varied little with leaf life span and below-ground fraction, while N productivity was positively correlated with below-ground fraction.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>Our data supported the hypothesis, suggesting that NUE of canopy production would be a measure of changes in ecosystem functioning from montane forests to alpine shrublands and grasslands along altitudinal gradients. The findings provide an insight into the linkage between biogeochemistry and phytogeographic processes across ecosystems.</p>\u0000 </section>\u0000 </div>","PeriodicalId":49965,"journal":{"name":"Journal of Vegetation Science","volume":"35 2","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140031926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Seedling recruitment in response to stand composition, interannual climate variability, and soil disturbance in the boreal mixed woods of Canada","authors":"Kobra Maleki,&nbsp;Philippe Marchand,&nbsp;Danielle Charron,&nbsp;Yves Bergeron","doi":"10.1111/jvs.13237","DOIUrl":"https://doi.org/10.1111/jvs.13237","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>Seedling recruitment is a vital process for forest regeneration and is influenced by various factors such as stand composition, climate, and soil disturbance. We conducted a long-term field experiment (18 years) to study the effects of these factors and their interactions on seedling recruitment.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Our study focused on five main species in boreal mixed woods of eastern Canada: trembling aspen (<i>Populus tremuloides</i>), paper birch (<i>Betula papyrifera</i>), white spruce (<i>Picea glauca</i>), balsam fir (<i>Abies balsamea</i>), and white cedar (<i>Thuja occidentalis</i>).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>Sixteen 1-m² seedling monitoring subplots were set up in each of seven stands originating from different wildfires (fire years ranging from 1760 to 1944), with a soil scarification treatment applied to every other subplot. Annual new seedling counts were related to growing-season climate (mean temperature, growing degree days and drought code), scarification, and stand effects via a Bayesian generalized linear mixed model.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Soil scarification had a large positive effect on seedling recruitment for three species (aspen, birch and spruce). As expected, high mean temperatures during the seed production period (two years prior to seedling emergence) increased seedling recruitment for all species but aspen. Contrary to other studies, we did not find a positive effect of dry conditions during the seed production period. Furthermore, high values of growing degree days suppressed conifer seedling recruitment. Except for white cedar, basal area was weakly correlated with seedling abundance, suggesting a small number of reproductive individuals is sufficient to saturate seedling recruitment.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>Our findings underscore the importance of considering multiple factors, such as soil disturbance, climate, and stand composition, as well as their effects on different life stages when developing effective forest management strategies to promote regeneration in boreal mixed-wood ecosystems.</p>\u0000 </section>\u0000 </div>","PeriodicalId":49965,"journal":{"name":"Journal of Vegetation Science","volume":"35 2","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140031918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reduced plant species diversity and soil carbon and nitrogen contents driven by vegetation patchiness in alpine meadows","authors":"Shougang Xi,&nbsp;Tinghua Hu,&nbsp;Xiaoming Mou,&nbsp;Xiaoxue Kou,&nbsp;Xianzhi Wang,&nbsp;Yingwen Yu","doi":"10.1111/jvs.13238","DOIUrl":"https://doi.org/10.1111/jvs.13238","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Question</h3>\u0000 \u0000 <p>Patchiness of herbaceous species is a common feature of degraded alpine grasslands on the Qinghai–Tibet Plateau; however, the impact of this phenomenon on vegetation, soil seed bank (SSB), and soil carbon (C) and nitrogen (N) is largely unknown. We asked how different herbaceous patches affect above-ground vegetation, the SSB and soil organic C (SOC) and total N (TN) contents in alpine meadows.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>An alpine meadow on the Qinghai–Tibetan Plateau, China.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We used field and greenhouse experiments to evaluate above-ground vegetation parameters, the SSB composition, and SOC and TN contents of four commonly distributed herbaceous patches (<i>Leymus secalinus</i>, <i>Kobresia humilis</i>, <i>Leontopodium nanum</i> and <i>Pedicularis kansuensis</i>) and non-patch vegetation (control).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>There were significant differences in the species composition of above-ground vegetation, with the plant species richness, Shannon–Wiener index, Simpson index, and Pielou evenness index reduced in the four patches compared to the control. In addition, patches had increased above-ground biomass (AGB) and a lower below-ground biomass to above-ground biomass ratio (BGB:AGB); while the species diversity indices did not change considerably among the patches. The species composition of the SSB in the four patches differed from that in the control and the seed density increased markedly, but the species richness and diversity of the SSB remained unaltered. Moreover, the contents of SOC, total C, TN, microbial biomass C, and microbial biomass N in the four patches were markedly lower than in the control.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>These findings suggest that patchiness of herbaceous species can alter the flora composition of alpine meadows and reduce plant species diversity, as well as the SOC and TN contents, which will adversely impact grassland biodiversity conservation and soil C sequestration, and then may intensify the degradation of alpine meadows on the Qinghai–Tibet Plateau.</p>\u0000 </section>\u0000 </div>","PeriodicalId":49965,"journal":{"name":"Journal of Vegetation Science","volume":"35 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139987376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nutrient-demanding and thermophilous plants dominate urban forest-edge vegetation across temperate Europe","authors":"Karen De Pauw,&nbsp;Leen Depauw,&nbsp;Kim Calders,&nbsp;Sara A. O. Cousins,&nbsp;Guillaume Decocq,&nbsp;Emiel De Lombaerde,&nbsp;Martin Diekmann,&nbsp;David Frey,&nbsp;Jonathan Lenoir,&nbsp;Camille Meeussen,&nbsp;Anna Orczewska,&nbsp;Jan Plue,&nbsp;Fabien Spicher,&nbsp;Florian Zellweger,&nbsp;Pieter Vangansbeke,&nbsp;Kris Verheyen,&nbsp;Pieter De Frenne","doi":"10.1111/jvs.13236","DOIUrl":"https://doi.org/10.1111/jvs.13236","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Questions</h3>\u0000 \u0000 <p>Forests are highly fragmented across the globe. For urban forests in particular, fragmentation increases the exposure to local warming caused by the urban heat island (UHI) effect. We here aim to quantify edge effects on herbaceous understorey vegetation in urban forests, and test whether these effects interact with forest structural complexity.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>We set up a pan-European study at the continental scale including six urban forests in Zurich, Paris, Katowice, Brussels, Bremen, and Stockholm.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We recorded understorey plant communities from the edge towards the interior of urban forests. Within each urban forest, we studied edge-to-interior gradients in paired stands with differing forest structural complexity. Community composition was analysed based on species specialism, life form, light, nutrient, acidity and disturbance indicator values and species' thermal niches.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>We found that herbaceous communities at urban forest edges supported more generalists and forbs but fewer ferns than in forests' interiors. A buffered summer microclimate proved crucial for the presence of fern species. The edge communities contained more thermophilous, disturbance-tolerant, nutrient-demanding and basiphilous plant species, a pattern strongly confirmed by corresponding edge-to-interior gradients in microclimate, soil and light conditions in the understorey. Additionally, plots with a lower canopy cover and higher light availability supported higher numbers of both generalists and forest specialists. Even though no significant interactions were found between the edge distance and forest structural complexity, opposing additive effects indicated that a dense canopy can be used to buffer negative edge effects.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>The urban environment poses a multifaceted filter on understorey plant communities which contributes to significant differences in community composition between urban forest edges and interiors. For urban biodiversity conservation and the buffering of edge effects, it will be key to maintain dense canopies near urban forest edges.</p>\u0000 </section>\u0000 </div>","PeriodicalId":49965,"journal":{"name":"Journal of Vegetation Science","volume":"35 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jvs.13236","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139915727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of local environmental gradients on ecological strategies of herbaceous communities in riverine side channels","authors":"Corentin Gaudichet,&nbsp;Sabine Greulich,&nbsp;Séraphine Grellier,&nbsp;Philippe Janssen,&nbsp;Stéphane Rodrigues","doi":"10.1111/jvs.13227","DOIUrl":"https://doi.org/10.1111/jvs.13227","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Questions</h3>\u0000 \u0000 <p>In riverine side channels (secondary and former arms), the alternation of lotic, lentic and dry phases produces disturbance and resource gradients that filter species and community strategies. To better understand the impact of this alternation of functioning on plant communities at a fine spatial scale, we tested for the effects of elevation (linked to water level), slope, longitudinal position, light availability and sediment grain size on (i) taxonomic composition and (ii) competition, stress tolerance, and ruderal strategies (C, S and R strategies) at the community level. We hypothesized that fewer resources would increase the stress-tolerant prevalence (i.e., community-weighted mean value), while topographic gradients would affect ruderal prevalence. In addition, we hypothesized that strong and directional environmental filtering should reduce the co-occurrence of species with different CSR strategy values (i.e., low C, S and R functional dispersion).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Fourteen side channels on the lower reach of the Loire river (France).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Taxonomic composition of the herb layer and environmental variables were assessed on 474 plots. The relations between species composition and environmental gradients were investigated by a constrained analysis of principal coordinates. The effects of environmental gradients on community CSR strategies were assessed using mixed-effects models and a model-averaging procedure.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Taxonomic community composition was shaped mainly by light availability, topographic elevation and sediment grain size. Slope and the interaction between light and elevation influenced the community-weighted mean and functional dispersion values of S and R strategies. Among other interactions, those involving sediment grain size shaped the dispersion values for C and R strategies.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>The study identified shading and fine sediment grain size as key drivers of biotic homogenization in the riverscape. Increasing the disturbance frequency and magnitude would limit the progression of the ecological succession and favor the co-occurrence of taxonomically and functionally diverse communities within the side channels.</p>\u0000 </section>\u0000 </div>","PeriodicalId":49965,"journal":{"name":"Journal of Vegetation Science","volume":"35 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jvs.13227","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139682843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Contribution of soil seed banks to vegetation resilience in coastal freshwater wetlands of subtropical Australia","authors":"Rebekah Grieger,&nbsp;Samantha J. Capon,&nbsp;Wade L. Hadwen,&nbsp;Brendan Mackey","doi":"10.1111/jvs.13234","DOIUrl":"https://doi.org/10.1111/jvs.13234","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Questions</h3>\u0000 \u0000 <p>What role do soil seed banks play in the resilience of coastal freshwater wetland vegetation communities? How might soil seed bank composition and similarity to standing vegetation drive changes in vegetation expression, particularly given projected changes in climate?</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Sixty wooded coastal freshwater wetlands in southeast Queensland, Australia.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We surveyed standing vegetation and investigated soil seed bank composition through an 8-month-long emergence experiment.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Soil seed bank assemblages were dominated by forb and sedge species (23% exotic), but composition varied throughout the study region. Spatial (north–south) and land-use (urban–rural) gradients explained some variation in soil seed bank composition. Soil moisture and groundwater dependence also influenced species distributions, particularly for freshwater wetland species. The similarity of soil seed banks to standing vegetation was low. Species present in both extant and soil seed bank assemblages were commonly native wetland taxa, including one salt marsh species (<i>Juncus kraussii</i>).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>Projected climatic changes will likely drive changes in coastal freshwater wetland vegetation communities through increases in the frequency and intensity of disturbances (e.g., storm surge). Our results suggest that regeneration from soil seed banks could promote four potential scenarios: (1) expansion of weed communities, (2) expansion of salt marsh communities, (3) maintenance and expansion of wetland/terrestrial species, and (4) transformation to an unvegetated open water zone because of reduced regeneration success under changing conditions. These diverse vegetation futures highlight the vulnerability of wooded coastal freshwater wetlands and the need for research and management interventions to maintain their biodiversity and ecosystem services.</p>\u0000 </section>\u0000 </div>","PeriodicalId":49965,"journal":{"name":"Journal of Vegetation Science","volume":"35 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jvs.13234","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139655481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Foredune-forming grass and plant diversity shows contrasting responses along the southeastern United States coast after hurricane disturbance","authors":"Davide De Battisti,&nbsp;Christine Angelini,&nbsp;Matthew Joyce,&nbsp;Sinead Crotty,&nbsp;Tom Phillip Fairchild,&nbsp;Hallie Samantha Fischman,&nbsp;John Nicholas Griffin","doi":"10.1111/jvs.13230","DOIUrl":"https://doi.org/10.1111/jvs.13230","url":null,"abstract":"&lt;div&gt;\u0000 \u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Aims&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;Latitudinal gradients in plant communities are well studied, yet how these fundamental ecological patterns influence ecosystem recovery after extreme weather events remains largely unknown. In coastal foredunes, we investigated how the cover of a key dune-building grass (&lt;i&gt;Uniola paniculata&lt;/i&gt;), vegetation diversity and vegetation cover vary along a short latitudinal gradient during recovery from hurricane disturbance.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Location&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;Southeastern USA.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Methods&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;We surveyed 24 sites, from central Florida to north Georgia (&gt;400 km), four times over 18 months. General linear mixed-effect models were used to unravel patterns of vegetation responses across latitude.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Results&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;Vegetation properties showed countervailing patterns across the latitudinal gradient. While vegetation richness, functional diversity and total cover generally declined, &lt;i&gt;Uniola&lt;/i&gt; cover increased with increasing latitude. Further, the latitude–-richness relationship strengthened while the latitude–functional diversity relationship was invariant with increasing time since the hurricane disturbance. Meanwhile, the latitude–&lt;i&gt;Uniola&lt;/i&gt; association was seasonally dependent and strongest in the summer. Latitude also influenced diversity–cover relationships: vegetation cover was positively related to species richness at lower latitudes, while it was positively associated with functional diversity only at northern sites. We found no relationship between species richness or functional diversity and increases in cover between time steps; however, recruitment of new species and functional groups was associated with increases in vegetation cover between time steps at northern sites.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Conclusions&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;Our study highlights the temporal dynamism and contrasting patterns along latitudinal gradients exhibited by key engineering species and overall plant diversity in foredunes — a crucial line of coastal protection — exposed to hurricane disturbances. These results suggest a need for greater integration of latitudinal and diversity effects into our understanding of coastal dune resilience. They also highlight the potential benefits of enhancing dune plant biodiversity, particularly in areas where the dune-building grasses that are classically employed in restoration (e.g., &lt;i&gt;Uniola&lt;/i&gt;) are unfavoured, to accelerate the","PeriodicalId":49965,"journal":{"name":"Journal of Vegetation Science","volume":"35 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jvs.13230","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139655536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Trait–growth relationships in Colombian tropical dry forests: Incorporating intraspecific variation and trait interactions","authors":"Slendy Rodríguez-Alarcón,&nbsp;Roy González-M,&nbsp;Carlos P. Carmona,&nbsp;Enrico Tordoni","doi":"10.1111/jvs.13233","DOIUrl":"10.1111/jvs.13233","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Question</h3>\u0000 \u0000 <p>Trait-based ecology is built on the notion that traits impact individual performance, but trait–growth relationships have rarely been tested considering the intraspecific variation, trait interactions, and potential nonlinearity in these relationships.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Seven tropical dry forests throughout Colombia.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We examined trait–growth relationships in 263 woody species of tropical dry forests in Colombia, including trait and growth information measured in the same individuals. We measured height, stem, and leaf traits related to growth and hydraulic safety–efficiency in 967 individuals in seven permanent plots (1 ha). We assessed trait–growth relationships using random forest models for each plot with different trait resolutions (individual, plot, area) and complexity of trait interactions (low, medium, high).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Trait–growth relationships were generally weak without significant differences among trait resolutions or levels of interactions between traits. However, when considering leaf phenology, the proportion of growth variation explained in deciduous species was almost three times higher than in evergreen species. Finally, we found that the effect of traits on growth was consistent across plots and phenological strategies, with both stem (vessel area and pit diameter aperture) and leaf (leaf area and specific leaf area) traits ranked as important predictors, the relevance of which depended on the species’ leaf phenology.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>Our findings indicate that growth is probably limited by different factors depending on the species’ physiology according to the leaf habit considered. However, other factors not included in the analysis, such as microenvironmental variability, might influence trait–growth relationships in tropical dry forests. Overall, our results suggest that a trait coordination approach at the whole-plant level is needed to better understand plants’ performance and demographic rates in this ecosystem. Further studies on the traits of regional flora and consideration of longer growth periods would help to elucidate the dynamics governing trait composition in these forests, which is essential for the design of adequate forest restoration and conservation practices.</p>\u0000 </section>\u0000 </div>","PeriodicalId":49965,"journal":{"name":"Journal of Vegetation Science","volume":"35 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139585807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of changing precipitation in different periods on precipitation use efficiency in a semi-arid grassland","authors":"Hongjiao Wang,&nbsp;Yuying He,&nbsp;Daiyu Qiao,&nbsp;Rui Xiao,&nbsp;Zhongling Yang","doi":"10.1111/jvs.13223","DOIUrl":"10.1111/jvs.13223","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Question</h3>\u0000 \u0000 <p>Climate change intensifies global and regional water cycles, leading to changes in both the magnitude and timing of precipitation. Precipitation use efficiency (PUE) plays a crucial role in measuring the response of above-ground net primary productivity (ANPP) to precipitation changes. However, little is known about how changes in precipitation during different periods affect PUE.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>Using a manipulation precipitation experiment in a semi-arid steppe, we simulated a 60% increase and decrease in precipitation during the early (April–June), late (July–September), and entire (April–September) growing seasons across 2015–2021 to examine the effects of changes in precipitation timing on PUE.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The results showed that: (1) decreased precipitation in the late growing season (DLP) and whole growing season (DWP) stimulated PUE by an average of 0.14 and 0.12 g m⁻² mm⁻¹ yr⁻¹ respectively, whereas increased precipitation in the late growing season (ILP) and whole growing season (IWP) suppressed PUE by an average of 0.11 and 0.09 g m⁻² mm⁻¹ yr⁻¹ respectively. By contrast, neither decreased nor increased precipitation in the early growing season affected PUE; (2) the increased PUE under DLP was primarily attributed to the increase of PUE in grass (GR) and annuals and biennials (AB), whereas the elevation of PUE under DWP was mainly due to an increase of PUE in AB. By contrast, the reduction of PUE under ILP was mainly caused by a decline of PUE in GR; (3) changes in evapotranspiration and leaf dry matter content (LDMC) explained the variation of PUE in AB while changes of PUE in GR was mainly due to the alteration of soil water content and LDMC.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>These results suggest that precipitation during the late growing season has a crucial influence on PUE, highlighting the importance of evapotranspiration and LDMC in regulating ecosystem productivity in the semi-arid steppe.</p>\u0000 </section>\u0000 </div>","PeriodicalId":49965,"journal":{"name":"Journal of Vegetation Science","volume":"35 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139556795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Independent biodiversity mechanisms regulate ecosystem multifunctionality and its temporal stability under resource enrichment in a mown grassland","authors":"Fengwei Xu,&nbsp;Jianjun Li,&nbsp;Liji Wu,&nbsp;Jishuai Su,&nbsp;Biao Zhu,&nbsp;Yang Wang,&nbsp;Dima Chen,&nbsp;Yongfei Bai","doi":"10.1111/jvs.13231","DOIUrl":"https://doi.org/10.1111/jvs.13231","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Questions</h3>\u0000 \u0000 <p>Although the relationships between biodiversity and individual ecosystem functions under resource enrichment have been extensively studied, there is limited understanding of how resource-induced changes affect ecosystem multifunctionality and its temporal stability, along with the underlying biological mechanisms.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Inner Mongolia, China.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We investigated the impact of biodiversity mechanisms on ecosystem multifunctionality and its temporal stability through a 3-year field experiment. This experiment involved augmenting growing season precipitation and nitrogen deposition, conducted in a typical steppe ecosystem of Inner Mongolia alongside regular mowing.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Our findings revealed that the addition of water (W) and nitrogen (N) had varying effects on ecosystem multifunctionality and its temporal stability. The combination of N and W additions enhanced ecosystem multifunctionality, whereas both W and N + W additions promoted the temporal stability of ecosystem multifunctionality. Structural equation modeling demonstrated that the community-weighted mean height, in response to nitrogen addition, played a key role in enhancing ecosystem multifunctionality. By contrast, increased species asynchrony because of water addition and greater functional diversity in terms of leaf area contributed to heightened temporal stability of ecosystem multifunctionality. Furthermore, the positive effects of community-weighted mean height on ecosystem multifunctionality exhibited a gradual increase with rising threshold levels.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>Our study provides the first evidence of the independent effects of selection, exemplified by community-weighted mean and complementarity, represented by factors such as species richness, functional diversity and species asynchrony on both ecosystem multifunctionality and its temporal stability. This underscores how global change factors can directly influence ecosystem multifunctionality and its temporal stability while also indirectly modulating biodiversity effects in the short term. Overall, our findings underscore the vital role of biodiversity conservation in enhancing grassland management and the delivery of ecosystem services in the context of global change, particularly in regions subject to extensive mowing.</p>\u0000 </section>\u0000 </div>","PeriodicalId":49965,"journal":{"name":"Journal of Vegetation Science","volume":"35 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139504615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}