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| Diversity and Productivity of Trees in the context of Climate Change | |
| 项目编号 | ANR-16-CE32-0003 |
| Monsieur Hervé JACTEL | |
| 项目主持机构 | INRA - UMR Biodiversité Gènes et Communauté |
| 开始日期 | 2016-10-01 |
| 结束日期 | 2020-10-01 |
| 英文摘要 | Forests are major terrestrial ecosystems providing a wealth of ecosystem services, including climate change mitigation through carbon sequestration and fossil fuel substitution. However forests are increasingly affected by climate-driven disturbances like droughts and pest outbreaks. To meet with the increasing demand for wood products, there is therefore an urgent need to design new forest types and managements that allow forests to be both more productive and less vulnerable, i.e. combining mitigation and adaptation objectives. One of the main options is to favour species diverse forests because positive relationships between tree diversity and forest productivity have been found. However, little is known about the capacity of mixed forests to sustain biomass production under climate change. The main objective of the project is therefore to quantify the effect of tree species diversity on the temporal stability of forest productivity, tackling the resistance and resilience of mixed forests to extreme climate events. Another major goal is to provide a better understanding of ecological mechanisms at work, addressing linkages between tree growth and above and below ground ecosystem processes, such as light interception, water use, litter decomposition, nutrient uptake and resistance to herbivory. To achieve those targets the project will rely on two existing experimental platforms where tree species diversity and microclimate conditions (temperature and drought) are both controlled. In the ORPHEE experiment (Aquitaine), 25,600 trees belonging to five native species have been planted to provide eight replicates of the 31 possible combinations of 1 to 5 species. Four out of the eight blocks are nightly sprayed with water during the growing season, thus avoiding any soil drought. The BIOPROFOR experiment consists of six elevational gradients in the Alps where beech, fir and oak, both in pure and mixed stands, are present at three elevation steps. Four teams of expert scientists in forest ecology, ecophysiology, biogeochemistry and entomology will work together in both experimental biodiversity platforms using the same methodological approaches and a common sampling scheme. Empirical data obtained in field studies will be used as inputs to structural equation models. They will be developed to disentangle the causal relationships between tree diversity and the stability of mixed forest productivity through the ecosystem processes that are both affected by climate constraints and involved in tree growth. The outcomes of these analyses will be used to improve a process-based model of forest dynamics (ForCEEPS) which can deal with mixed forests and take climate variables into account. Long term simulations will be run to better quantify resistance and resilience of productivity in pure vs. mixed forests under contrasting climate change scenarios. This will allow testing for more combinations of tree species assemblages and thus ensures generic outputs from this project. These outputs will be then challenged against forest stakeholders’ expectations so that the project can ultimately help forest managers to develop innovations in mixed plantation forestry along the lines of sustainable forest management and ecological intensification. |
| 资助机构 | FR-ANR |
| 项目经费 | 647393 |
| 项目类型 | (DS0102) 2016 |
| URL | http://www.agence-nationale-recherche.fr/en/anr-funded-project/?solr=run&tx_lwmsuivibilan_pi2%5BCODE%5D=ANR-16-CE32-0003 |
| 国家 | FR |
| 语种 | 英语 |
| 文献类型 | 项目 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/69581 |
| 推荐引用方式 GB/T 7714 | Monsieur Hervé JACTEL.Diversity and Productivity of Trees in the context of Climate Change.2016. |
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