The role of phenotypic plasticity for plant functional traits in tropical forests

15865 7 87326 2 248061 document 87326 EGU2019-2402-Hofhansl.pdf application/pdf 12c15a1ed89f92292d79634dba2acd15 MD5 25172757 2019-04-18 06:52:35 https://pure.iiasa.ac.at/id/eprint/15865/1/EGU2019-2402-Hofhansl.pdf 15865 1 1 application/pdf text en public cc_by_nc_4

EGU2019-2402-Hofhansl.pdf

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http://eprints.org/relation/isVersionOf https://pure.iiasa.ac.at/id/document/87326 http://eprints.org/relation/isVolatileVersionOf https://pure.iiasa.ac.at/id/document/87326 http://eprints.org/relation/issmallThumbnailVersionOf https://pure.iiasa.ac.at/id/document/87326 archive 353 disk0/00/01/58/65 2019-04-18 06:56:27 2021-08-27 17:31:40 2019-04-18 06:56:27 conference_item show 1 Hofhansl F. 2222 0000-0003-0073-0946 Chacón-Madrigal E. Brännström Å. 8085 Dieckmann U. 1668 0000-0001-7089-0393 Franklin O. 1791 0000-0002-0376-4140 The role of phenotypic plasticity for plant functional traits in tropical forests pub prog_eep prog_esm Tropical tree communities comprise high species richness and functional diversity in highly heterogeneous environments. Phenotypic plasticity is the main mechanism by which trees adjust their functional traits in response to environmental variation and climate change. However, the degree of plasticity is not well known for most plant functional traits. We compiled a dataset based on 345 individuals from 35 tropical tree species investigating the role of phenotypic plasticity versus non-plastic variation among key plant functional traits, (i.e. wood density, total height, SLA, leaf N content). We hypothesized that trait variation due to plastic components are driven by environmental variability independently of geographic distance, whereas the non-plastic component increases with geographic distance due to local adaption of the population to different environments. Based on this hypothesis we partitioned total observed trait variation into phenotypic plasticity and non-plastic components and quantified how functional trait variation is related to environmental heterogeneity and geographic distance among tropical forest stands. We found that overall trait variation was strongly related to spatial factors, thus often masking phenotypic plasticity in response to environmental cues. However, respective environmental controlling factors differed among functional traits, such that leaf traits varied in strong association with edaphic factors, whereas wood traits were more significantly affected by topography and light regime. We further show that the identified pattern of phenotypic plasticity versus non-plastic trait variation increased with the range size of congeneric tree species. Hence, this might indicate less plastic responses of endemic tree species compared to their widespread congeners, which thus could be more vulnerable to environmental changes under future scenarios. 2019-04-08 published https://www.egu2019.eu/ 3022 39 66 95 public paper European Geosciences Union (EGU) General Assembly 2019 Vienna, Austria 7–12 April 2019 conference FALSE FALSE no info:eu-repo/semantics/conferenceObject