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1. The GenTree Leaf Collection: Inter‐ and intraspecific leaf variation in seven forest tree species in Europe

Author

Jérémy Marchon, Alan Gray, Sebastian Richter, Christophe Plomion, René Graf, Francesca Bagnoli, Elisabet Martínez-Sancho, Volker Schneck, Frédéric Bernier, Vladimir L. Semerikov, Henry Bignalet, José Alberto Ramírez-Valiente, Ioannis Ganopoulos, Felix Gugerli, Agathe Hurel, Geir Ostreng, Sandro Morganti, Santiago C. González-Martínez, David López-Quiroga, Luc Puzos, William Brunetto, Raquel Benavides, Damien Bouic, Olivier Ambrosio, Filippos A. Aravanopoulos, Mirko Liesebach, Cristina C. Bastias, Veronique Jorge, Outi Savolainen, Stephen Cavers, Célia Michotey, Bernard Dokhelar, Mehdi Pringarbe, Enja Hollenbach, Camilla Avanzi, Silvio Schueler, José M. García del Barrio, Annie Raffin, Bruno Fady, Anna-Maria Farsakoglou, Olivier Gilg, Pascal Milesi, Sonja T. Kujala, Nicolas Mariotte, Florian Knutzen, Nicolas Cheval, F. J. Auñón, Céline Lalanne, Marc Villar, Catherine Bastien, Katri Kärkkäinen, Nicolas Poinot, Fernando Del Caño, Jan-Philipp Kappner, Florence Jean, Birte Pakull, Tanja Pyhäjärvi, Jørn Henrik Sønstebø, Rémi Dourthe, Ermioni Malliarou, Ivan Scotti, Timo Kumpula, Mariaceleste Labriola, Silvia Matesanz, Bernard Issehuth, Martin Lascoux, Jean Thevenet, Christian Rellstab, Marianne Correard, Ricardo Alía, Johannes Lambertz, Anne Eskild Nilsen, Eva Cremer, Christoph Hartleitner, Darius Danusevičius, Lars Opgenoorth, Fernando Valladares, Arnaud Jouineau, Ana M. Cabanillas‐Saldaña, José Climent, Audrey Albet, Jurata Buchovska, Benjamin Dauphin, Sergio San Segundo, Ilaria Spanu, Antonio Mas, Johan Westin, Eduardo Notivol, Juan J. Robledo-Arnuncio, Andrea Piotti, Evangelos Barbas, Robert Kesälahti, Andreas Fera, Mari Mette Tollefsrud, Helge Meischner, Grégoire Le Provost, Eduardo Ballesteros, Tor Myking, Bárbara Carvalho, Jean-Luc Denou, Katrin Heer, Giovanni G. Vendramin, Evangelia V. Avramidou, Norbert Turion, Patrick Fonti, Delphine Grivet, Department of Biogeography and Global Change, Museo Nacional de Ciencias Naturales [Madrid] (MNCN), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Université Paul-Valéry - Montpellier 3 (UPVM)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro - Montpellier SupAgro, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), UK Centre for Ecology & Hydrology, Natural Environment Research Council (NERC), Unité expérimentale Forêt Pierroton (UEFP), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Department of Forest Ecology and Genetics, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria = National Institute for Agricultural and Food Research and Technology (INIA), Ecologie des Forêts Méditerranéennes (URFM), Aristotle University of Thessaloniki, Istituto di Bioscienze e BioRisorse [Palermo] (IBBR), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Biologie intégrée pour la valorisation de la diversité des Arbres et de la Forêt (BioForA), Office national des forêts (ONF)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Vytautas Magnus University - Vytauto Didziojo Universitetas (VDU), Gobierno de Aragon, Centro de Investigación y Tecnología Agroalimentaria de Aragón (CITA), Unité Expérimentale Entomologie et Forêt Méditerranéenne (UEFM), Bavarian Office for Forest Seeding and Planting, Partenaires INRAE, Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Austrian Research Centre for Forests (BFW), Institute of Plant Breeding and Genetic Resources, Biodiversité, Gènes & Communautés (BioGeCo), Université de Bordeaux (UB)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), LIECO GmbH & Co KG, Philipps Universität Marburg = Philipps University of Marburg, Natural Resources Institute Finland (LUKE), University of Oulu, Department of Ecology and Genetics [Uppsala] (EBC), Uppsala University, Thunen Institute of Forest Ecosystems, Thünen Institute, Área de Biodiversidad y Conservación, Universidad Rey Juan Carlos, Universidad Rey Juan Carlos [Madrid] (URJC), Unité de Recherche Génomique Info (URGI), Norsk institutt for bioøkonomi=Norwegian Institute of Bioeconomy Research (NIBIO), Institute of Plant and Animal Ecology, Ural Branch of Russian Academy of Sciences (UB RAS), Skogforsk - Swedish Forestry Research Institute, Horizon 2020. Grant Numbers: 676876, 4540-143AP, 6, 0032 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES (Brazil), European Project: 676876,H2020,H2020-SFS-2015-2,GenTree(2016), European Commission, Ministerio de Ciencia, Innovación y Universidades (España), Comunidad de Madrid, State Secretariat for Education, Research and Innovation (Switzerland), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Brasil), Museo Nacional de Ciencias Naturales (CSIC), Université Paul-Valéry - Montpellier 3 (UPVM)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Consiglio Nazionale delle Ricerche (CNR), Office National des Forêts (ONF)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Centro de Investigacion Y Tecnologia Agroalimentaria de Aragon, Philipps Universität Marburg, Norwegian Institute of Bioeconomy Research (NIBIO), and Centro de Investigacion y Tecnologia Agroalimentaria de Aragon (CITA)

Subjects
0106 biological sciences, Specific leaf area, Population, Phenotypic variation, 010603 evolutionary biology, 01 natural sciences, Ecology and Environment, Leaf functional traits, tree species, Fagus sylvatica, leaf functional traits, Leaf economics spectrum, Leaf size, education, intraspecific variability, Ecology, Evolution, Behavior and Systematics, Global and Planetary Change, education.field_of_study, Ecology, biology, leaf economics spectrum, 010604 marine biology & hydrobiology, Intraspecific variability, Botany, phenotypic variation, Botanik, Interspecific competition, 15. Life on land, biology.organism_classification, Forest genetic resources, Quercus petraea, Sample collection, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, European forests, Tree species
Abstract

[Motivation] Trait variation within species can reveal plastic and/or genetic responses to environmental gradients, and may indicate where local adaptation has occurred. Here, we present a dataset of rangewide variation in leaf traits from seven of the most ecologically and economically important tree species in Europe. Sample collection and trait assessment are embedded in the GenTree project (EU-Horizon 2020), which aims at characterizing the genetic and phenotypic variability of forest tree species to optimize the management and sustainable use of forest genetic resources. Our dataset captures substantial intra- and interspecific leaf phenotypic variability, and provides valuable information for studying the relationship between ecosystem functioning and trait variability of individuals, and the response and resilience of species to environmental changes., [Main types of variable contained] We chose morphological and chemical characters linked to trade-offs between acquisition and conservation of resources and water use, namely specific leaf area, leaf size, carbon and nitrogen content and their ratio, and the isotopic signature of stable isotope 13C and 15N in leaves., [Spatial location and grain] We surveyed between 18 and 22 populations per species, 141 in total, across Europe., [Time period] Leaf sampling took place between 2016 and 2017., [Major taxa and level of measurement] We sampled at least 25 individuals in each population, 3,569 trees in total, and measured traits in 35,755 leaves from seven European tree species, i.e. the conifers Picea abies, Pinus pinaster and Pinus sylvestris, and the broadleaves Betula pendula, Fagus sylvatica, Populus nigra and Quercus petraea., [Software format] The data files are in ASCII text, tab delimited, not compressed., All authors acknowledge support from the European Union’s Horizon 2020 Research and Innovation Programme under grant agreement no. 676876 (Project GenTree). Laboratory work was also supported by other projects: COMEDIAS (CGL2017- 83170-R, Spanish Ministry of Science, Innovation and Universities), REMEDINAL IV (TE-CM S2018/EMT-4338, Project of the Autonomous Community of Madrid, Spain), SPONFOREST (BIODIVERSA-3, PCIN-2016-055), and International Laboratory of Global Change (LINCGlobal 4540-143AP). The Swiss contribution was supported by the Swiss Secretariat for Education, Research and Innovation (SERI) under contract no. 6.0032. BC was funded by a Scholarship from Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES (Brazil).

Published
2021
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2. Intercropping N-fixing shrubs in pine plantation forestry as an ecologically sustainable management option

Author

David F. Vidal, Laurent Augusto, Florian Delerue, Luc Puzos, Pierre Trichet, Mark R. Bakker, Interactions Sol Plante Atmosphère (UMR ISPA), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro), Unité Expérimentale Forêt Pierroton (UEFP), Institut National de la Recherche Agronomique (INRA), and Institut Polytechnique de Bordeaux (Bordeaux INP)

Subjects
0106 biological sciences, [SDV]Life Sciences [q-bio], ved/biology.organism_classification_rank.species, Pinus pinaster, maritime pine, functional ecology, Management, Monitoring, Policy and Law, 010603 evolutionary biology, 01 natural sciences, Shrub, nitrogen, common gorse, biogeochemistry, Forest ecology, Ulex europaeus, Nature and Landscape Conservation, 2. Zero hunger, biology, ved/biology, food and beverages, Sowing, Forestry, 15. Life on land, leguminous species, biology.organism_classification, [SDE]Environmental Sciences, Soil fertility, Thicket, 010606 plant biology & botany, Woody plant
Abstract

International audience; We explored the ecological impact of a nitrogen-fixing shrub (Ulex europaeus, common gorse) cultivated as an intercrop species in the interlines of a young stand of maritime pine (Pinus pinaster). Nitrogen fixing species are well-known for their advantage of increasing the soil fertility in agriculture. Nevertheless, in forest ecosystems, their use is uncommon except in some associations in the tropics. The Landes de Gascogne forest range (SW France) has soil fertility issues and Ulex europaeus is a vigorous plant, native to this region. Therefore, an investigation of the association of this N-fixing species with trees is worthwhile. To this end, we compared a standard pine plantation management (control) with a treatment where gorse seeds were sown in the interlines at tree plantation (gorse sowing). This factor was combined with a phosphorus supply (control versus P-fertilisation), resulting in four treatments. The forestry practices evaluated here distinguish two main periods: a first period of six years after tree plantation when gorse individuals grew as an intercrop and formed dense vegetation, and a second period of three years after crushing this vegetation in the interlines. In the first period, pine mortality in the gorse sowing treatment was higher during the dry season than in the control treatment, suggesting competition for water. Pine diameter growth was reduced, but not height growth, indicating avoidance of light competition with gorse. In the presence of gorse, pine foliar-N was appreciably enhanced relative to the control, and natural pine pruning occurred, while pine browsing by animals was limited due to the protection of the thorny gorse thickets surrounding the trees. In the second period, soon after crushing the gorse vegetation in the interlines, enrichment of nitrogen in needles continued, suggesting a fertilising effect of the gorse remnants. Crushing also freed the pines from shrub competition and a “catch-up growth” was identified regarding diameter and stem volume growth. Two years after the gorse crushing, tree size and biomass were similar in the experimental treatments regardless of gorse sowing or not. Overall, during the first nine years after tree plantation, gorse introduction in the pine tree forests had various effects. On the one hand, gorse induced competition for light and water. On the other hand, it resulted in high inputs of nitrogen and organic matter into the ecosystem which could lead to sustained soil fertility and this might improve tree nutritional status. We recommend continuing the assessment of such pine-gorse forestry associations for longer observation periods and in very nutrient-poor sites in this forest range.

Published
2019
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3. Understorey-overstorey biotic and nutrient interactions are key factors for Pinus pinaster growth and development under oligotrophic conditions

Author

Mark R. Bakker, Luc Puzos, Pierre Trichet, David F. Vidal, Jean-Christophe Domec, and Laurent Augusto

Subjects
Nutrient, Key factors, biology, Ecology, Environmental science, Pinus pinaster, Forestry, Understory, biology.organism_classification
Abstract

The main objective of this study was to examine the interactive effects of nutrient availability and understorey plants, including a nitrogen(N)-fixing shrub, on growth, physiology and survival of commercial maritime pines (Pinus pinaster Ait.). Three experimental sites within the Landes de Gascogne forest were installed in two wet moorlands (one dominated by gorse, a leguminous shrub and one by a perennial grass), and in one dry moorland dominated by ericaceous plants. In dry moorland, the ericaceous understorey increased pine mortality and decreased pine growth, suggesting a competition for water, the most limiting resource of this ecosystem. In wet moorland, a decrease in pine growth suggested a strong competition for soil resources, with or without phosphorus addition. In the other wet moorland dominated by gorse, pines responded to competition for light through stem elongation and self-pruning, but not by reducing growth. The intercropped gorse improved pine N-nutrition and trees acclimated to shrubs by growing more fine roots. Gorse had a positive effect on stomatal conductance during spring, while pine water status decreased moderately with increasing shrub competition during summer. Our results provide new understanding of the feasibility of using gorse as an intercropping N-fixing plant in managed forests, and revealed the structural and physiological trade-offs that exist between increasing N-availability and competition for water and light.

Published
2021
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