| 1. Identity statement | ||||
| Reference Type | Journal Article | |||
| Site | mtc-m21c.sid.inpe.br | |||
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S | |||
| Identifier | 8JMKD3MGP3W34R/3SCLPTH | |||
| Repository | sid.inpe.br/mtc-m21c/2018/12.13.15.16 (restricted access) | |||
| Last Update | 2018:12.13.15.16.36 (UTC) administrator | |||
| Metadata Repository | sid.inpe.br/mtc-m21c/2018/12.13.15.16.36 | |||
| Metadata Last Update | 2020:01.06.11.42.07 (UTC) administrator | |||
| DOI | 10.1111/1365-2745.13022 | |||
| ISSN | 0022-0477 | |||
| Citation Key | BrumVIASAPDABBPO:2019:HyNiSe | |||
| Title | Hydrological niche segregation defines forest structure and drought tolerance strategies in a seasonal Amazon forest  | |||
| Year | 2019 | |||
| Access Date | 2024, Apr. 23 | |||
| Type of Work | journal article | |||
| Secondary Type | PRE PI | |||
| Number of Files | 1 | |||
| Size | 1337 KiB | |||
| 2. Context | ||||
| Author | 1 Brum, Mauro 2 Valdeboncoeur, Matthew A. 3 Ivanov, Valeriy 4 Asbjornsen, Heidi 5 Saleska, Scott 6 Alves, Luciana F. 7 Penha, Deliane 8 Dias, Jadson D. 9 Aragão, Luiz Eduardo Oliveira e Cruz de 10 Barros, Fernanda 11 Bittencourt, Paulo 12 Pereira, Luciano 13 Oliveira, Rafael S. | |||
| Group | 1 2 3 4 5 6 7 8 9 DIDSR-CGOBT-INPE-MCTIC-GOV-BR | |||
| Affiliation | 1 Universidade Estadual de Campinas (UNICAMP) 2 University of New Hampshire 3 University of Michigan 4 University of New Hampshire 5 University of Arizona 6 University of California 7 Universidade Federal do Oeste do Pará (UFOPA) 8 Universidade de São Paulo (USP) 9 Instituto Nacional de Pesquisas Espaciais (INPE) 10 Universidade Estadual de Campinas (UNICAMP) 11 Universidade Estadual de Campinas (UNICAMP) 12 Universidade Estadual de Campinas (UNICAMP) 13 Universidade Estadual de Campinas (UNICAMP) | |||
| Author e-Mail Address | 1 2 3 4 5 6 7 8 9 luiz.aragao@inpe.br | |||
| Journal | Journal of Ecology | |||
| Volume | 107 | |||
| Pages | 318-333 | |||
| Secondary Mark | A1_INTERDISCIPLINAR A1_CIÊNCIAS_AGRÁRIAS_I A1_BIODIVERSIDADE C_CIÊNCIAS_BIOLÓGICAS_I | |||
| History (UTC) | 2018-12-13 15:19:01 :: simone :: 2018 -> 2019 2018-12-13 15:19:01 :: simone -> administrator :: 2019 2020-01-06 11:42:07 :: administrator -> simone :: 2019 | |||
| 3. Content and structure | ||||
| Is the master or a copy? | is the master | |||
| Content Stage | completed | |||
| Transferable | 1 | |||
| Content Type | External Contribution | |||
| Version Type | publisher | |||
| Keywords | 2015 ENSO Amazon functional diversity cavitation embolism resistance hydraulic traits root depth stable isotopes water potential | |||
| Abstract | 1. The relationship between rooting depth and above-ground hydraulic traits can potentially define drought resistance strategies that are important in determining species distribution and coexistence in seasonal tropical forests, and understanding this is important for predicting the effects of future climate change in these ecosystems. 2. We assessed the rooting depth of 12 dominant tree species (representing c. 42% of the forest basal area) in a seasonal Amazon forest using the stable isotope ratios (δ18O and δ2 H) of water collected from tree xylem and soils from a range of depths. We took advantage of a major ENSO-related drought in 2015/2016 that caused substantial evaporative isotope enrichment in the soil and revealed water use strategies of each species under extreme conditions. We measured the minimum dry season leaf water potential both in a normal year (2014; Ψnon-ENSO) and in an extreme drought year (2015; ΨENSO). Furthermore, we measured xylem hydraulic traits that indicate water potential thresholds trees tolerate without risking hydraulic failure (P50 and P88). 3. We demonstrate that coexisting trees are largely segregated along a single hydrological niche axis defined by root depth differences, access to light and tolerance of low water potential. These differences in rooting depth were strongly related to tree size; diameter at breast height (DBH) explained 72% of the variation in the δ18Oxylem. Additionally, δ18Oxylem explained 49% of the variation in P50 and 70% of P88, with shallow-rooted species more tolerant of low water potentials, while δ18O of xylem water explained 47% and 77% of the variation of minimum Ψnon-ENSO and ΨENSO. 4. We propose a new formulation to estimate an effective functional rooting depth, i.e. the likely soil depth from which roots can sustain water uptake for physiological functions, using DBH as predictor of root depth at this site. Based on these estimates, we conclude that rooting depth varies systematically across the most abundant families, genera and species at the Tapajós forest, and that understorey species in particular are limited to shallow rooting depths. 5. Our results support the theory of hydrological niche segregation and its underlying trade-off related to drought resistance, which also affect the dominance structure of trees in this seasonal eastern Amazon forest. 6. Synthesis. Our results support the theory of hydrological niche segregation and demonstrate its underlying trade-off related to drought resistance (access to deep water vs. tolerance of very low water potentials). We found that the single hydrological axis defining water use traits was strongly related to tree size, and infer that periodic extreme droughts influence community composition and the dominance structure of trees in this seasonal eastern Amazon forest. | |||
| Area | SRE | |||
| Arrangement | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDSR > Hydrological niche segregation... | |||
| doc Directory Content | access | |||
| source Directory Content | there are no files | |||
| agreement Directory Content |
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| 4. Conditions of access and use | ||||
| Language | en | |||
| Target File | brum_hydrological.pdf | |||
| User Group | simone | |||
| Visibility | shown | |||
| Read Permission | deny from all and allow from 150.163 | |||
| Update Permission | not transferred | |||
| 5. Allied materials | ||||
| Next Higher Units | 8JMKD3MGPCW/3ER446E | |||
| Host Collection | urlib.net/www/2017/11.22.19.04 | |||
| 6. Notes | ||||
| Empty Fields | alternatejournal archivingpolicy archivist callnumber copyholder copyright creatorhistory descriptionlevel dissemination e-mailaddress format isbn label lineage mark mirrorrepository month nextedition notes number orcid parameterlist parentrepositories previousedition previouslowerunit progress project readergroup resumeid rightsholder schedulinginformation secondarydate secondarykey session shorttitle sponsor subject tertiarymark tertiarytype url | |||
| 7. Description control | ||||
| e-Mail (login) | simone | |||
| update | ||||