@InProceedings{BormaBBFBONGLL:2019:SoPoEx,
author = "Borma, Laura de Simone and Brum, Mauro and Barros, Fernanda de V.
and Fonseca, Let{\'{\i}}cia D'Agosto Miguel and Bittencourt,
Paulo and Oliveira, Rafael S. and Nascimento, Denis and Gentine,
Pierre and Lintner, Benjamin R. and Lee, Jung-Eun",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Universidade Estadual de Campinas (UNICAMP)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Universidade Estadual de Campinas
(UNICAMP)} and {Universidade Estadual de Campinas (UNICAMP)} and
{Instituto Nacional de Pesquisas da Amaz{\^o}nia (INPA)} and
{Columbia University} and Rutgers and {Brown University}",
title = "Soil porosity explains Amazon forest response to droughts?",
year = "2019",
organization = "AGU Fall Meeting",
abstract = "One of the most intriguing aspects of Amazon forest functioning is
its capacity to maintain elevated evapotranspiration (ET) and
photosynthetic capacity during the dry season and even during some
severe droughts. Until now, the principal mechanisms by which the
Amazon forests increase or maintain ET rates and photosynthetic
activity during dry periods have considered the soil as a
vertically homogeneous media which stores water during the wet
periods and releases it to plants as a function of the rooting
depth. However, the soil system is more complex. Small variations
in the soil porosity and animal roles (i.e. biopores) can favor
plant root developments. Our results show that, in the Central
Amazon, plant roots develop preferentially in layers with greater
macroporosity and lower silt contents (i.e. above 1m depth and at
around 2.4 m and 3.2 m). In turn, the soil properties in these
layers favor root development (e.g., through lower mechanical
resistance), and they increase rainfall infiltration through the
development of preferential flow, further helping photosynthesis
maintenance and plant growth. This soil-rooting feedback mechanism
may be a key mechanism for the maintenance of photosynthesis and
transpiration rates in dry periods.",
conference-location = "San Francisco, CA",
conference-year = "09-13 dec.",
language = "en",
targetfile = "borma_soil.pdf",
urlaccessdate = "23 abr. 2024"
}