Contrasting patterns of community-weighted mean traits and functional diversity in driving grassland productivity changes under N and P addition DOI Creative Commons
Yuting Yang, Zhifei Chen, Bingcheng Xu

et al.

Frontiers in Plant Science, Journal Year: 2023, Volume and Issue: 14

Published: Aug. 15, 2023

Fertilization could influence ecosystem structure and functioning through species turnover (ST) intraspecific trait variation (ITV), especially in nutrient limited ecosystems. To quantify the relative importance of ITV ST driving community functional productivity changes under nitrogen (N) phosphorous (P) addition semiarid grasslands. In this regard, we conducted a four-year fertilizer experiment grassland on Loess Plateau, China. We examined how fertilization affects species-level leaf root plasticity to evaluate ability plants manifest different levels traits response N P addition. Also, assessed or dominated community-weighted mean (CWM) diversity variations evaluated their effects productivity. The results showed that patterns varied greatly among plant species, coordinated following fertilization. Increasing level increased CWM_specific area (CWM_SLA), CWM_leaf concentration (CWM_LN) CWM_maximum height (CWM_H max ) predominate these CWM variations. As results, CWM_H , CWM_LN CWM_SLA positively influenced contrast, divergence decreased with increasing negative relationships Our emphasized contrastingly drive

Language: Английский

Performance of Johnsongrass and switchgrass from seeds and rhizome fragments in a mature switchgrass stand DOI
Susanne Schwinning, Philip A. Fay, H. Wayne Polley

et al.

Plant Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: March 10, 2025

Language: Английский

Citations

0
Effects of Disturbance and Fertilisation on Plant Community Synchrony, Biodiversity and Stability Through Succession DOI
Janette L. Davidson, Kaitlyn R. McKnight, Megan Szojka

et al.

Ecology Letters, Journal Year: 2025, Volume and Issue: 28(4)

Published: April 1, 2025

Global change drivers alter multiple components of community composition, with cascading impacts on ecosystem stability. However, it remains largely unknown how interactions among global will synchrony, especially across successional timescales. We analysed a 22-year time series grassland data from Cedar Creek, USA, to examine the joint effects pulse soil disturbance and press nitrogen addition richness, evenness stability during transient post-transient periods succession. Using regression structural equation modelling, we found that decreased both synchrony stability, thereby weakening negative synchrony-stability relationship. evidence portfolio effect transience, but once communities settled restructured state post-transience, diversity no longer influenced Differences between underscore need for long-term inform management under ongoing change.

Language: Английский

Citations

0
Nothing lasts forever: Dominant species decline under rapid environmental change in global grasslands DOI Creative Commons
Peter A. Wilfahrt, Eric W. Seabloom, Jonathan D. Bakker

et al.

Journal of Ecology, Journal Year: 2023, Volume and Issue: 111(11), P. 2472 - 2482

Published: Sept. 23, 2023

Abstract Dominance often indicates one or a few species being best suited for resource capture and retention in given environment. Press perturbations that change availability of limiting resources can restructure competitive hierarchies, allowing new to retain leaving once dominant fated decline. However, may maintain high abundances even when their environments no longer favour them due stochastic processes associated with abundance, impeding deterministic would otherwise diminish them. Here, we quantify the persistence dominance by tracking rate decline at 90 globally distributed grassland sites under experimentally elevated soil nutrient supply reduced vertebrate consumer pressure. We found chronic experimental addition exclusion caused certain subsets lose more quickly than control plots. In plots, perennial initial cover maintained annual those low respectively. fertilized similar rates while lower lost faster controls. High increased estimated time loss strongly plots exclosures Vertebrate slight decrease perennials, fertilization brought perennials' line annuals. Annual regardless treatments. Synthesis. Collectively, these results point strong role species' historical abundance maintaining following environmental perturbations. Because play an outsized driving ecosystem processes, ability remain dominant—regardless conditions—is critical anticipating expected structure function grasslands. Species competitively favoured press result community compositions do not maximize capture, key process system responses global change.

Language: Английский

Citations

9
Grazing exclusion is more effective for vegetation restoration and nutrient transfer in the heavily degraded desert steppe DOI Creative Commons
Dongjie Hou, Jiayue Liu, Nan Li

et al.

BMC Plant Biology, Journal Year: 2024, Volume and Issue: 24(1)

Published: May 17, 2024

Abstract Background Grazing exclusion is an efficient practice to restore degraded grassland ecosystems by eliminating external disturbances and improving ecosystems’ self-healing capacities, which affects the ecological processes of soil-plant systems. Grassland degradation levels play a critical role in regulating these processes. However, effects vegetation soil states at different stages on ecosystem restoration are not fully understood. To better understand this, desert steppe three (light, moderate, heavy degradation) was fenced for 6 years Inner Mongolia, China. Community characteristics were investigated, nutrient concentrations (0–10 cm depth) dominant plants measured. Results We found that grazing increased shoots’ carbon (C) concentrations, C/N, C/P, but significantly decreased nitrogen (N) phosphorus (P) Stipa breviflora Cleistogenes songorica . Interestingly, there no significant differences two species among steppes after exclusion. After exclusion, annual accumulation rates aboveground C, N, P pools heavily area highest, lowest grasslands. Similarly, recovery community height, cover, biomass highest These results indicate more effective steppe. The total carbon, nitrogen, phosphorus, available moderately six whereas changes lightly Structural equation model analysis showed level mainly altered pool, driving decrease accelerating transfer from plant community, especially grassland. Conclusions Our study emphasizes importance provides theoretical guidance scientific formulation containment policies.

Language: Английский

Citations

2
Persistence and extinction of a reaction–diffusion vegetation-water system with time–space white noise DOI

Zixiao Xiong,

Jing Hu, Ming Ye

et al.

Chaos Solitons & Fractals, Journal Year: 2024, Volume and Issue: 185, P. 115112 - 115112

Published: June 8, 2024

Language: Английский

Citations

1
Biodiversity in changing environments: An external‐driver internal‐topology framework to guide intervention DOI
Katharine N. Suding, Courtney G. Collins, Lauren M. Hallett

et al.

Ecology, Journal Year: 2024, Volume and Issue: 105(8)

Published: July 16, 2024

Accompanying the climate crisis is more enigmatic biodiversity crisis. Rapid reorganization of due to global environmental change has defied prediction and tested basic tenets conservation restoration. Conceptual practical innovation needed support decision making in face these unprecedented shifts. Critical questions include: How can we generalize at community level? When are systems able reorganize maintain integrity, when does abiotic result collapse or restructuring? this understanding provide a template guide how intervene restoration? To end, frame changes organization as modulation external drivers on internal topology species interactions, using plant-plant interactions terrestrial communities starting point. We then explore framing help translate available data abundance trait distributions corresponding decisions management. Given expectation that response highly complex, external-driver internal-topology (EDIT) framework offers way capture general patterns resilience adaptation changing environments.

Language: Английский

Citations

1
Local nutrient addition drives plant biodiversity losses but not biotic homogenization in global grasslands DOI Creative Commons
Qingqing Chen, Shane A. Blowes, W. Stanley Harpole

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: March 29, 2024

Abstract Nutrient enrichment typically causes local plant diversity decline. A common but untested expectation is that it reduces variation in nutrient conditions among localities and selects for a smaller pool of species, causing greater declines at larger scales biotic homogenization. We apply topology linking changes species richness across characterizes the numbers spatially restricted widespread to standardized experiment adding nutrients 72 grasslands on six continents. Overall, we found similar proportional loss scales, no homogenization after 4 years up 14 treatment. These patterns were generally consistent groups (e.g., native graminoids legume species). Thus, poses threats includes are often critical ecosystem functions.

Language: Английский

Citations

0
Variation in precipitation drives differences in interactions and short-term transient instability between grassland functional groups: a stage-structured community approach DOI Creative Commons

Aryaman Gupta,

Samuel J. L. Gascoigne, György Barabás

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 11, 2024

Abstract Climate change is expected to increase the frequency and severity of precipitation extremes, causing droughts flooding. Consequently, grassland communities are forecasted become increasingly unstable. To predict responses, we need empirical information together with models that reliably extrapolate community dynamics from those observations. However, such prediction challenging because typically simulate long-term (asymptotic) performance, thus potentially neglect their short-term (transient) performance. Here, use data a experiment performed over eight years model both short- responses three functional groups – grasses, legumes, non-leguminous forbs extremes. We multi-functional-group Integral Projection Models pseudospectral theory, track dynamics. show percentage-cover-stage-structure shapes transient instability, inter-functional-group interactions competitive under increased but facilitative decreased precipitation. IPMs pseudospectra enable forecasting how functional-group-stage-structure drives climatic

Language: Английский

Citations

0
Contrasting patterns of community-weighted mean traits and functional diversity in driving grassland productivity changes under N and P addition DOI Creative Commons
Yuting Yang, Zhifei Chen, Bingcheng Xu

et al.

Frontiers in Plant Science, Journal Year: 2023, Volume and Issue: 14

Published: Aug. 15, 2023

Fertilization could influence ecosystem structure and functioning through species turnover (ST) intraspecific trait variation (ITV), especially in nutrient limited ecosystems. To quantify the relative importance of ITV ST driving community functional productivity changes under nitrogen (N) phosphorous (P) addition semiarid grasslands. In this regard, we conducted a four-year fertilizer experiment grassland on Loess Plateau, China. We examined how fertilization affects species-level leaf root plasticity to evaluate ability plants manifest different levels traits response N P addition. Also, assessed or dominated community-weighted mean (CWM) diversity variations evaluated their effects productivity. The results showed that patterns varied greatly among plant species, coordinated following fertilization. Increasing level increased CWM_specific area (CWM_SLA), CWM_leaf concentration (CWM_LN) CWM_maximum height (CWM_H max ) predominate these CWM variations. As results, CWM_H , CWM_LN CWM_SLA positively influenced contrast, divergence decreased with increasing negative relationships Our emphasized contrastingly drive

Language: Английский

Citations

0