Island plant functional syndromes and competition with invasive species DOI
Kasey E. Barton, Claire Fortunel

Journal of Biogeography, Journal Year: 2023, Volume and Issue: 50(4), P. 641 - 653

Published: Jan. 27, 2023

Abstract Island floras are diverse with exceptionally high rates of endemicity, and they also severely threatened. Invasive plants widespread on islands, but whether islands particularly susceptible to invasion or island species more vulnerable displacement, both, remains unclear. As part the “island plant syndrome,” it has been predicted that have convergently evolved conservative resource use, slow growth rates, weak competitive abilities in response moderate climates presumed absence competition communities relatively low richness. Yet, functional trait approaches provided mixed evidence support this prediction, direct tests as neighbour effects performance lacking. Considering extensive environmental heterogeneity exists within among seems likely strategies, spanning acquisitive, plants. Furthermore, assessing syndrome predictions through comparisons invasive species, which nonrandom subsets continental plants, is a flawed approach. Future studies compare strategies native versus for between local scale at occurs, consider non‐additivities other simultaneous global threats, urgently needed conserve these biodiversity hotspots.

Language: Английский

Warm springs alter timing but not total growth of temperate deciduous trees DOI
Cameron Dow, Albert Y. Kim, Loïc D’Orangeville

et al.

Nature, Journal Year: 2022, Volume and Issue: 608(7923), P. 552 - 557

Published: Aug. 10, 2022

Language: Английский

Citations

75
Latitudinal patterns in stabilizing density dependence of forest communities DOI Creative Commons
Lisa Hülsmann, Ryan A. Chisholm, Liza S. Comita

et al.

Nature, Journal Year: 2024, Volume and Issue: 627(8004), P. 564 - 571

Published: Feb. 28, 2024

Abstract Numerous studies have shown reduced performance in plants that are surrounded by neighbours of the same species 1,2 , a phenomenon known as conspecific negative density dependence (CNDD) 3 . A long-held ecological hypothesis posits CNDD is more pronounced tropical than temperate forests 4,5 which increases community stabilization, coexistence and diversity local tree 6,7 Previous analyses supporting such latitudinal gradient 8,9 suffered from methodological limitations related to use static data 10–12 Here we present comprehensive assessment patterns using dynamic mortality estimate species-site-specific across 23 sites. Averaged species, found stabilizing was at all except one site, but average not stronger toward tropics. However, communities, rare intermediate abundant experienced did common species. This pattern absent forests, suggests influences abundances strongly it does ones 13 We also interspecific variation CNDD, might attenuate its effect on 14,15 high significantly different latitudes. Although consequences these for gradients difficult evaluate, speculate effective regulation population could translate into greater stabilization communities thus contribute forests.

Language: Английский

Citations

19
Putting seedlings on the map: Trade‐offs in demographic rates between ontogenetic size classes in five tropical forests DOI Creative Commons
Stephan Kambach, Helge Bruelheide, Liza S. Comita

et al.

Ecology, Journal Year: 2025, Volume and Issue: 106(1)

Published: Jan. 1, 2025

Abstract All species must partition resources among the processes that underly growth, survival, and reproduction. The resulting demographic trade‐offs constrain range of viable life‐history strategies are hypothesized to promote local coexistence. Tropical forests pose ideal systems study as they have a high diversity coexisting tree whose tend align along two orthogonal axes variation: growth–survival trade‐off separates with fast growth from survival stature–recruitment achieve large stature recruitment. As these typically been explored for trees ≥1 cm dbh, it is unclear how species' during earliest seedling stages related dbh. Here, we used principal components correlation analyses (1) determine main seed‐to‐seedling transition rates overstory size classes 1188 large‐scale forest dynamics plots in Panama, Puerto Rico, Ecuador, Taiwan, Malaysia (2) quantify predictive power maximum wood density, seed mass, specific leaf area position gradients. In four out five forests, was most important encompassed both seedlings second separated relatively at stage relationship between aces differed sites. traits were significant predictors gradients, albeit varying importance. We concluded that, after accounting trade‐off, trade off later life stages. This ontogenetic offers mechanistic explanation constitutes an additional dimension variation species‐rich ecosystems.

Language: Английский

Citations

2
Calibration of GEDI footprint aboveground biomass models in Mediterranean forests with NFI plots: A comparison of approaches DOI Creative Commons
Adrián Pascual, Paul May, Aarón Cárdenas-Martínez

et al.

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 375, P. 124313 - 124313

Published: Jan. 31, 2025

Observations from the NASA Global Ecosystem Dynamics Investigation (GEDI) provide global information on forest structure and biomass. Footprint-level predictions of aboveground biomass density (AGBD) in GEDI mission are based training data sourced sparsely distributed field plots coincident with airborne laser scanning surveys. National Forest Inventories (NFI) rarely used to calibrate footprint models because their sampling positional accuracy prevent accurate colocation or ALS. This omission can limit harmonization jurisdictional estimates NFI's GEDI; however, there methods available improve NFI footprints. Focusing Mediterranean forests Spain, we compared different approaches collocation data: (i) simulated waveforms ALS; (ii) nearest-neighbor on-orbit waveforms; (iii) imputed plot locations using a novel geostatistical method. These potential solutions local performance address systematic deviations between estimates. We assess advantages limitations these locally quantify impact geolocation errors reference data. The new each method were predict level AGBD, which then gridded for province North-West Spain. It was found that imputation approach is not sensitive common geolocation, but it outperform ALS-based simulation some cases, highlighting benefit multiple footprints proximate improving predictions. research provides users benchmark techniques locally-calibrate models.

Language: Английский

Citations

2
Latitudinal scaling of aggregation with abundance and coexistence in forests DOI Creative Commons
Thorsten Wiegand, Xugao Wang, Samuel Fischer

et al.

Nature, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 26, 2025

The search for simple principles that underlie the spatial structure and dynamics of plant communities is a long-standing challenge in ecology1–6. In particular, relationship between species coexistence distribution plants challenging to resolve species-rich communities7–9. Here we present comprehensive analysis patterns 720 tree 21 large forest plots their consequences coexistence. We show with low abundance tend be more spatially aggregated than abundant species. Moreover, there latitudinal gradient strength this negative aggregation–abundance increases from tropical temperate forests. suggest, line recent work10, gradients animal seed dispersal11 mycorrhizal associations12–14 may jointly generate pattern. By integrating observed into population models8, derive conditions under which can invade terms patterns, demography, niche overlap immigration. Evaluation spatial-invasion condition analysed suggests forests both meet invasion criterion similar extent but through contrasting strategies conditioned by patterns. Our approach opens up new avenues integration ecological theory underscores need understand interaction among at neighbourhood scale multiple processes greater detail. A unified framework presented integrates individual trees novel theory.

Language: Английский

Citations

2
The Global Ecosystems Monitoring network: Monitoring ecosystem productivity and carbon cycling across the tropics DOI
Yadvinder Malhi, Cécile A. J. Girardin, Daniel B. Metcalfe

et al.

Biological Conservation, Journal Year: 2021, Volume and Issue: 253, P. 108889 - 108889

Published: Jan. 1, 2021

Language: Английский

Citations

87
Joint effects of climate, tree size, and year on annual tree growth derived from tree‐ring records of ten globally distributed forests DOI
Kristina J. Anderson‐Teixeira, Valentine Herrmann, Christine R. Rollinson

et al.

Global Change Biology, Journal Year: 2021, Volume and Issue: 28(1), P. 245 - 266

Published: Oct. 20, 2021

Tree rings provide an invaluable long-term record for understanding how climate and other drivers shape tree growth forest productivity. However, conventional tree-ring analysis methods were not designed to simultaneously test effects of climate, size, on individual growth. This has limited the potential ecologically relevant hypotheses sensitivity environmental their interactions with size. Here, we develop apply a new method model nonlinear primary drivers, reconstructed diameter at breast height (DBH), calendar year in generalized least squares models that account temporal autocorrelation inherent each tree's We analyze data from 3811 trees representing 40 species 10 globally distributed sites, showing precipitation, temperature, DBH, have additively, often interactively, influenced annual over past 120 years. Growth responses predominantly positive precipitation (usually ≥3-month seasonal windows) negative temperature maximum ≤3-month windows), concave-down 63% relationships. Climate commonly varied DBH (45% cases tested), larger usually more sensitive. Trends ring width small linked light environment under which established, but basal area or biomass increments consistently reached maxima intermediate DBH. Accounting rate declined time 92% secondary disturbed stands, whereas trends mixed older forests. These largely attributable stand dynamics as cohorts stands age, remain challenging disentangle global change drivers. By providing parsimonious approach characterizing multiple interacting growth, our reveals complete picture factors influencing than previously been possible.

Language: Английский

Citations

80
Carbon cycling in mature and regrowth forests globally DOI Creative Commons
Kristina J. Anderson‐Teixeira, Valentine Herrmann,

Rebecca Banbury Morgan

et al.

Environmental Research Letters, Journal Year: 2021, Volume and Issue: 16(5), P. 053009 - 053009

Published: March 9, 2021

Abstract Forests are major components of the global carbon (C) cycle and thereby strongly influence atmospheric dioxide (CO 2 ) climate. However, efforts to incorporate forests into climate models CO accounting frameworks have been constrained by a lack accessible, global-scale synthesis on how C cycling varies across forest types stand ages. Here, we draw from Global Forest Carbon Database, ForC, provide macroscopic overview in world’s forests, giving special attention age-related variation. Specifically, use 11 923 ForC records for 34 variables 865 geographic locations characterize ensemble budgets four broad types—tropical broadleaf evergreen, temperate broadleaf, conifer, boreal. We calculate means standard deviations both mature regrowth (age < 100 years) quantify trends with age all sufficient data. rates generally decreased tropical boreal whereas stocks showed less directional Mature net ecosystem production did not differ significantly among biomes. The majority flux variables, together most live biomass pools, increased logarithm age. As change accelerates, understanding managing dynamics is critical forecasting, mitigation, adaptation. This comprehensive synthetic fluxes biomes ages contributes these efforts.

Language: Английский

Citations

73
Quantifying tropical forest structure through terrestrial and UAV laser scanning fusion in Australian rainforests DOI
Louise Terryn, Kim Calders, Harm Bartholomeus

et al.

Remote Sensing of Environment, Journal Year: 2022, Volume and Issue: 271, P. 112912 - 112912

Published: Jan. 29, 2022

Language: Английский

Citations

68
Distribution of biomass dynamics in relation to tree size in forests across the world DOI
Camille Piponiot, Kristina J. Anderson‐Teixeira, Stuart J. Davies

et al.

New Phytologist, Journal Year: 2022, Volume and Issue: 234(5), P. 1664 - 1677

Published: Feb. 24, 2022

Summary Tree size shapes forest carbon dynamics and determines how trees interact with their environment, including a changing climate. Here, we conduct the first global analysis of among‐site differences in aboveground biomass stocks fluxes are distributed tree size. We analyzed repeat censuses from 25 large‐scale (4–52 ha) plots spanning broad climatic range over five continents to characterize biomass, woody productivity, mortality vary diameter. examined median, dispersion, skewness these size‐related distributions mean annual temperature precipitation. In warmer forests, were more broadly respect wetter productivity right skewed, long tail towards large trees. Small (1–10 cm diameter) contributed than highlighting importance analyses dynamics. Our findings provide an improved characterization climate‐driven structure that as well refined benchmarks for capturing climate influences vegetation demographic models.

Language: Английский

Citations

52