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Multiple drivers of functional diversity in temperate forest understories: Climate, soil, and forest structure effects
Chelli , Stefano , Bricca , Alessandro , Tsakalos , James L. , Andreetta , Anna , Bonari , Gianmaria , Campetella , Giandiego , Carnicelli , Stefano , Cervellini , Marco , Puletti , Nicola , Wellstein , Camilla , Canullo , R.
climate change functional diversity bud bank forest management plant height seed mass specific leaf area
Mostra abstract
In macroecology, shifting from coarse- to local-scale explanatory factors is crucial for understanding how global change impacts functional diversity (FD). Plants possess diverse traits allowing them to differentially respond across a spectrum of environmental conditions. We aim to assess how macro- to microclimate, stand-scale measured soil properties, forest structure, and management type, influence forest understorey FD at the macroecological scale. Our study covers Italian forests, using thirteen predictors categorized into climate, soil, forest structure, and management. We analyzed five traits (i.e., specific leaf area, plant size, seed mass, belowground bud bank size, and clonal lateral spread) capturing independent functional dimensions to calculate the standardized effect size of functional diversity (SES-FD) for all traits (multi-trait) and for single traits. Multiple regression models were applied to assess the effect of predictors on SES-FD. We revealed that climate, soil, and forest structure significantly drive SES-FD of specific leaf area, plant size, seed mass, and bud bank. Forest management had a limited effect. However, differences emerged between herbaceous and woody growth forms of the understorey layer, with herbaceous species mainly responding to climate and soil features, while woody species were mainly affected by forest structure. Future warmer and more seasonal climate could reduce the diversity of resource economics, plant size, and persistence strategies of the forest understorey. Soil eutrophication and acidification may impact the diversity of regeneration strategies; canopy closure affects the diversity of above- and belowground traits, with a larger effect on woody species. Multifunctional approaches are vital to disentangle the effect of global changes on functional diversity since independent functional specialization axes are modulated by different drivers. © 2024 The Authors
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2024
Rivista
Science of the Total Environment
Dettagli
Vol. 916
DOI
Evolutionary ecology of masting: mechanisms, models, and climate change
Bogdziewicz , Michał , Kelly , Dave J. , Ascoli , Davide , Caignard , Thomas , Chianucci , Francesco , Crone , Elizabeth E. , Fleurot , Emilie , Foest , Jessie J. , Gratzer , Georg , Hagiwara , Tomika , Han , Qingmin , Journé , Valentin , Keurinck , Léa , Kondrat , Katarzyna , McClory , Ryan W. , LaMontagne , Jalene M. , Mundo , Ignacio A. , Nussbaumer , Anita , Oberklammer , Iris , Ohno , Misuzu , Pearse , Ian S. , Pesendorfer , Mario B. , Resente , Giulia , Satake , Akiko , Shibata , Mitsue , Snell , Rebecca S. , Szymkowiak , Jakub , Touzot , Laura , Zwolak , Rafał , Żywiec , Magdalena , Hacket-Pain , Andrew J.
climate change economies of scale environmental prediction plant demography plant reproduction
Mostra abstract
Many perennial plants show mast seeding, characterized by synchronous and highly variable reproduction across years. We propose a general model of masting, integrating proximate factors (environmental variation, weather cues, and resource budgets) with ultimate drivers (predator satiation and pollination efficiency). This general model shows how the relationships between masting and weather shape the diverse responses of species to climate warming, ranging from no change to lower interannual variation or reproductive failure. The role of environmental prediction as a masting driver is being reassessed; future studies need to estimate prediction accuracy and the benefits acquired. Since reproduction is central to plant adaptation to climate change, understanding how masting adapts to shifting environmental conditions is now a central question. © 2024 The Authors
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2024
Rivista
Trends in Ecology and Evolution
Dettagli
Vol. 39 (9) pp. 851 - 862
DOI
Widespread breakdown in masting in European beech due to rising summer temperatures
Foest , Jessie J. , Bogdziewicz , Michał , Pesendorfer , Mario B. , Ascoli , Davide , Cutini , Andrea , Nussbaumer , Anita , Verstraeten , Arne , Beudert , Burkhard , Chianucci , Francesco , Mezzavilla , Francesco , Gratzer , Georg , Kunstler , Georges , Meesenburg , H. , Wagner , Markus , Mund , Martina , Cools , Nathalie , Vacek , Stanislav , Schmidt , Wolfgang , Vacek , Zdeněk Ck , Hacket-Pain , Andrew J.
climate change fagus sylvatica seed production fecundity masting reproduction
Mostra abstract
Climate change effects on tree reproduction are poorly understood, even though the resilience of populations relies on sufficient regeneration to balance increasing rates of mortality. Forest-forming tree species often mast, i.e. reproduce through synchronised year-to-year variation in seed production, which improves pollination and reduces seed predation. Recent observations in European beech show, however, that current climate change can dampen interannual variation and synchrony of seed production and that this masting breakdown drastically reduces the viability of seed crops. Importantly, it is unclear under which conditions masting breakdown occurs and how widespread breakdown is in this pan-European species. Here, we analysed 50 long-term datasets of population-level seed production, sampled across the distribution of European beech, and identified increasing summer temperatures as the general driver of masting breakdown. Specifically, increases in site-specific mean maximum temperatures during June and July were observed across most of the species range, while the interannual variability of population-level seed production (CVp) decreased. The declines in CVp were greatest, where temperatures increased most rapidly. Additionally, the occurrence of crop failures and low seed years has decreased during the last four decades, signalling altered starvation effects of masting on seed predators. Notably, CVp did not vary among sites according to site mean summer temperature. Instead, masting breakdown occurs in response to warming local temperatures (i.e. increasing relative temperatures), such that the risk is not restricted to populations growing in warm average conditions. As lowered CVp can reduce viable seed production despite the overall increase in seed count, our results warn that a covert mechanism is underway that may hinder the regeneration potential of European beech under climate change, with great potential to alter forest functioning and community dynamics. © 2024 The Authors. Global Change Biology published by John Wiley & Sons Ltd.
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2024
Rivista
Global Change Biology
Dettagli
Vol. 30 (5)
DOI