@Article{BroedelTomaCândVonR:2017:DiNoYe,
author = "Broedel, Elis{\^a}ngela and Tomasella, Javier and C{\^a}ndido,
Luiz Ant{\^o}nio and Von Randow, Celso",
affiliation = "{Instituto Nacional de Pesquisas da Amaz{\^o}nia (INPA)} and
{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas da Amaz{\^o}nia (INPA)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)}",
title = "Deep soil water dynamics in an undisturbed primary forest
incentral Amazonia: differences between normal years and the2005
drought",
journal = "Hydrological Processes",
year = "2017",
volume = "31",
number = "Apr.",
pages = "1749--1759",
keywords = "central Amazonia, deep root water uptake, evapotranspiration, soil
moisture.",
abstract = "Understanding how Amazonian rainforests deal with extended
droughts is critical in the face of changing climate. This
research analyze the physical properties and the soil water
dynamics of a deep soil profile in an area of primary forest in
central Amazonia to elucidate these processes under drought and
nondrought conditions. Physical soil properties derived from soil
cores exhibited a distinctive layer between 480 and 880cm deep,
characterized by higher microporosity and low plant water
availability. In situ soil moisture measurements collected during
the period from January 2003 through February 2006 and for depths
ranging from 10 to 1,430cm suggest that, in the study site, the
top 480cm of the soil profile satisfied most of the
transpirational demands in normal climatological years. However,
during exceptionally dry periods, such as the 2005 drought, root
uptake occurs below 480cm. As concluded by previous studies, most
of the uptake is concentrated in the first meter of the soil
profile: More than 40% of the total demand for transpiration is
supplied by the top meter of soil. Because deep root uptake
occurred at greater depths than normal during the 2005 drought,
our results suggest that this is a fundamental mechanism to cope
with prolonged droughts.",
doi = "10.1002/hyp.11143",
url = "http://dx.doi.org/10.1002/hyp.11143",
issn = "0885-6087",
language = "en",
targetfile = "broedel_deep.pdf",
urlaccessdate = "27 abr. 2024"
}