TY  - JOUR
A1  - Caron, Maria Mercedes
A1  - De Frenne, Pieter
A1  - Brunet, Jörg
A1  - Chabrerie, Olivier
A1  - Cousins, Sara A. O.
A1  - Decocq, Guillaume
A1  - Diekmann, Martin
A1  - Graae, Bente Jessen
A1  - Heinken, Thilo
A1  - Kolb, Annette
A1  - Lenoir, Jonathan
A1  - Naaf, Tobias
A1  - Plue, Jan
A1  - Selvi, Federico
A1  - Wulf, Monika
A1  - Verheyen, Kris
T1  - Divergent regeneration responses of two closely related tree species to direct abiotic and indirect biotic effects of climate change
JF  - Forest ecology and management
N2  - Changing temperature and precipitation can strongly influence plant reproduction. However, also biotic interactions might indirectly affect the reproduction and recruitment success of plants in the context of climate change. Information about the interactive effects of changes in abiotic and biotic factors is essential, but still largely lacking, to better understand the potential effects of a changing climate on plant populations. Here we analyze the regeneration from seeds of Acer platanoides and Acer pseudoplatanus, two currently secondary forest tree species from seven regions along a 2200 km-wide latitudinal gradient in Europe. We assessed the germination, seedling survival and growth during two years in a common garden experiment where temperature, precipitation and competition with the understory vegetation were manipulated. A. platanoides was more sensitive to changes in biotic conditions while A. pseudoplatanus was affected by both abiotic and biotic changes. In general, competition reduced (in A. platanoides) and warming enhanced (in A. pseudoplatanus) germination and survival, respectively. Reduced competition strongly increased the growth of A. platanoides seedlings. Seedling responses were independent of the conditions experienced by the mother tree during seed production and maturation. Our results indicate that, due to the negative effects of competition on the regeneration of A. platanoides, it is likely that under stronger competition (projected under future climatic conditions) this species will be negatively affected in terms of germination, survival and seedling biomass. Climate-change experiments including both abiotic and biotic factors constitute a key step forward to better understand the response of tree species' regeneration to climate change. (C) 2015 Elsevier B.V. All rights reserved.
KW  - Acer
KW  - Regeneration
KW  - Latitudinal gradient
KW  - Temperature
KW  - Precipitation
KW  - Competition
Y1  - 2015
U6  - https://doi.org/10.1016/j.foreco.2015.01.003
SN  - 0378-1127
SN  - 1872-7042
VL  - 342
SP  - 21
EP  - 29
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Lemke, Isgard H.
A1  - Kolb, Annette
A1  - Graae, Bente J.
A1  - De Frenne, Pieter
A1  - Acharya, Kamal P.
A1  - Blandino, Cristina
A1  - Brunet, Jorg
A1  - Chabrerie, Olivier
A1  - Cousins, Sara A. O.
A1  - Decocq, Guillaume
A1  - Heinken, Thilo
A1  - Hermy, Martin
A1  - Liira, Jaan
A1  - Schmucki, Reto
A1  - Shevtsova, Anna
A1  - Verheyen, Kris
A1  - Diekmann, Martin
T1  - Patterns of phenotypic trait variation in two temperate forest herbs along a broad climatic gradient
JF  - Plant ecology : an international journal
N2  - Phenotypic trait variation plays a major role in the response of plants to global environmental change, particularly in species with low migration capabilities and recruitment success. However, little is known about the variation of functional traits within populations and about differences in this variation on larger spatial scales. In a first approach, we therefore related trait expression to climate and local environmental conditions, studying two temperate forest herbs, Milium effusum and Stachys sylvatica, along a similar to 1800-2500 km latitudinal gradient. Within each of 9-10 regions in six European countries, we collected data from six populations of each species and recorded several variables in each region (temperature, precipitation) and population (light availability, soil parameters). For each plant, we measured height, leaf area, specific leaf area, seed mass and the number of seeds and examined environmental effects on within-population trait variation as well as on trait means. Most importantly, trait variation differed both between and within populations. Species, however, differed in their response. Intrapopulation variation in Milium was consistently positively affected by higher mean temperatures and precipitation as well as by more fertile local soil conditions, suggesting that more productive conditions may select for larger phenotypic variation. In Stachys, particularly light availability positively influenced trait variation, whereas local soil conditions had no consistent effects. Generally, our study emphasises that intra-population variation may differ considerably across larger scales-due to phenotypic plasticity and/or underlying genetic diversity-possibly affecting species response to global environmental change.
KW  - Climate change
KW  - Global environmental change
KW  - Milium effusum
KW  - Phenotypic plasticity
KW  - Intraspecific variation
KW  - Stachys sylvatica
Y1  - 2015
U6  - https://doi.org/10.1007/s11258-015-0534-0
SN  - 1385-0237
SN  - 1573-5052
VL  - 216
IS  - 11
SP  - 1523
EP  - 1536
PB  - Springer
CY  - Dordrecht
ER  -