| 1. Identity statement | |
| Reference Type | Conference Poster (Conference Proceedings) |
| Site | mtc-m16d.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identifier | 8JMKD3MGP7W/389BR62 |
| Repository | sid.inpe.br/mtc-m19/2010/09.16.18.54 |
| Last Update | 2010:10.07.17.56.52 (UTC) administrator |
| Metadata Repository | sid.inpe.br/mtc-m19/2010/09.16.18.54.46 |
| Metadata Last Update | 2020:04.28.18.34.20 (UTC) administrator |
| Secondary Key | INPE--PRE/ |
| Citation Key | VonRandowAVTHBLMM:2010:DoSeFo |
| Title | Does secondary forest compensate the low evapotranspiration caused by conversion of forest to pasture?  |
| Year | 2010 |
| Access Date | 2024, May 16 |
| Secondary Type | PRE CI |
| Number of Files | 1 |
| Size | 624 KiB |
| 2. Context | |
| Author | 1 Von Randow, Rita de Cássia 2 Araujo, Alessandro 3 Von Randow, Celso 4 Tomasella, Javier 5 Hutjes, R W 6 Brasil, M T 7 Leal, L 8 Magina, Flavio Carvalho 9 Manzi, Antonio Ocimar |
| Resume Identifier | 1 2 3 4 8JMKD3MGP5W/3C9JHE3 |
| Group | 1 CST-CST-INPE-MCT-BR 2 3 CST-CST-INPE-MCT-BR 4 CST-CST-INPE-MCT-BR 5 6 7 8 CST-CST-INPE-MCT-BR |
| Affiliation | 1 Instituto Nacional de Pesquisas Espaciais (INPE) 2 LBA, Instituto Nacional de Pesquisas da Amazonia, Manaus, Brazil 3 Instituto Nacional de Pesquisas Espaciais (INPE) 4 Instituto Nacional de Pesquisas Espaciais (INPE) 5 ESS-CC, Wageningen University, Guaratingueta, Netherlands 6 LBA, Instituto Nacional de Pesquisas da Amazonia, Manaus, Brazil 7 LBA, Instituto Nacional de Pesquisas da Amazonia, Manaus, Brazil 8 Instituto Nacional de Pesquisas Espaciais (INPE) 9 LBA, Instituto Nacional de Pesquisas da Amazonia, Manaus, Brazil |
| Author e-Mail Address | 1 rita.vonrandow@gmail.com AF: ESS-CC, Wageningen University, Guaratingueta, Netherlands 2 alessandro.araujo@gmail.com 3 celso.vonrandow@cptec.inpe.br 4 javier.tomasella@cptec.inpe.br 5 ronald.hutjes@wur.nl 6 moniquetaiane@gmail.com 7 leilaleal2008@gmail.com 8 flaviomagina@uol.com.br 9 manzi@inpa.gov.br |
| Conference Name | The Meeting of the Americas. |
| Conference Location | Foz do Iguaçu, BR |
| Date | 8-12 aug 2010 |
| Book Title | Pôsteres |
| Tertiary Type | Poster Session |
| History (UTC) | 2010-10-07 17:56:52 :: valdirene -> administrator :: 2010 2020-04-28 18:34:20 :: administrator -> simone :: 2010 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| Content Type | External Contribution |
| Keywords | biosphere atmosphere interactions evapotranspiration land |
| Abstract | Forest to pasture conversion can lead to a decrease of precipitation induced by the decrease of evapotranspiration starting a positive feedback in the climate system. The accelerated deforestation rate suffered by Amazonian region is of global concern due to the importance of the Amazonia to the climate. Improve the understanding of the impact of deforestation in the hydrological cycle is of the highest importance. Nowadays, Amazonian landscape is no longer a homogeneous surface of pristine primary forest, but an heterogeneous irregular patches of pasture and agriculture plots of various sizes. Besides this, those patches were many times abandoned, creating opportunities for the regrowth of original vegetation (secondary forests). Impacts of fragmentation, and more specifically natural regrowth, on regional climate and hydrology are not well known. Previous studies pointed that the conversion of primary forest to pasture or agricultural crops affect the precipitation and runoff, and consequently evapotranspiration at micro scales, but this effect is not always detected at larger temporal and spatial scales. Few works suggested that the evaporative fraction of the secondary forest increases with the age of the forest in comparison with mature primary forests. Therefore, the objective of this study was to compare the evapotranspiration of one site of primary forest with one site of ~20 years old secondary forest in Central Amazonia, and to evaluate whether the secondary forest has a role on the resilience of the Amazon system compensating the effects of the deforestation on the water cycle. The latent heat flux of the secondary forest during the dry season was 29% higher than in the primary forest. During the wet season the secondary forest also presented 17% higher latent heat flux than in primary forest. The values of evapotranspiration were 4.28 mm day-1 for secondary forest against 3.32 mm day-1 for primary forest during the dry season, which represents a difference of around 1 mm day-1. During the wet season, the evapotranspiration for secondary forest was 3.99 mm day-1 against 3.42 mm.day-1 for primary forest, resulting in a difference of around 0.57 mm day-1. The evaporative fraction during the dry season in the secondary forest was around 0.80 and in the primary forest was 0.70. During the wet season this difference was lower, 0.89 for secondary forest and around 0.82 for primary forest. These results show that the difference on energy available for evapotranspiration is not the only cause of the higher evapotranspiration of the secondary forest in comparison with the primary forest in both dry and wet seasons. In conclusion, our study demonstrate that the secondary forest may play a relevant role in the Amazonia system, and confirm the urgent need of a better understanding of the role of this type of vegetation on a basin wide water and energy balance. Additionally, improvement of the representation of secondary vegetation on atmospheric models and in the analysis of soil-water-atmosphere interaction studies at regional and global scales. |
| Area | CST |
| Arrangement | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > COCST > Does secondary forest... |
| doc Directory Content | access |
| source Directory Content | there are no files |
| agreement Directory Content | there are no files |
| 4. Conditions of access and use | |
| data URL | http://urlib.net/ibi/8JMKD3MGP7W/389BR62 |
| zipped data URL | http://urlib.net/zip/8JMKD3MGP7W/389BR62 |
| Language | en |
| Target File | RitavonRandow_does.pdf |
| User Group | administrator valdirene |
| Reader Group | administrator valdirene |
| Visibility | shown |
| Read Permission | allow from all |
| Update Permission | not transferred |
| 5. Allied materials | |
| Mirror Repository | sid.inpe.br/mtc-m19@80/2009/08.21.17.02.53 |
| Next Higher Units | 8JMKD3MGPCW/3F3T29H |
| Citing Item List | sid.inpe.br/mtc-m21/2012/07.13.14.50.34 1 |
| Host Collection | sid.inpe.br/mtc-m19@80/2009/08.21.17.02 |
| 6. Notes | |
| Empty Fields | archivingpolicy archivist callnumber copyholder copyright creatorhistory descriptionlevel dissemination doi e-mailaddress edition editor format isbn issn label lineage mark nextedition notes numberofvolumes orcid organization pages parameterlist parentrepositories previousedition previouslowerunit progress project publisher publisheraddress rightsholder schedulinginformation secondarydate secondarymark serieseditor session shorttitle sponsor subject tertiarymark type url versiontype volume |
| 7. Description control | |
| e-Mail (login) | simone |
| update | |