Deep soil water dynamics in an undisturbed primary forest in central Amazonia: Differences between normal years and the 2005 drought
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 drough...
| Autor principal: | Broedel, Elisângela |
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| Outros Autores: | Tomasella, J., Cândido, Luiz Antônio, Von Randow, Celso |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Hydrological Processes
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/17124 |
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oai:repositorio:1-17124 |
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oai:repositorio:1-17124 Deep soil water dynamics in an undisturbed primary forest in central Amazonia: Differences between normal years and the 2005 drought Broedel, Elisângela Tomasella, J. Cândido, Luiz Antônio Von Randow, Celso Drought Evapotranspiration Forestry Moisture Soil Moisture Soil Testing Soils Amazonia Amazonian Rainforest Deep Roots Distinctive Layers Fundamental Mechanisms Physical Soil Properties Situ Soil Moistures Soil Water Dynamics Soil Surveys Drought Evapotranspiration Physical Property Soil Moisture Soil Profile Soil Water Water Uptake Amazonia 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 880 cm 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 1,430 cm suggest that, in the study site, the top 480 cm 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 480 cm. 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. Copyright © 2017 John Wiley & Sons, Ltd. 2020-06-15T21:39:07Z 2020-06-15T21:39:07Z 2017 Artigo https://repositorio.inpa.gov.br/handle/1/17124 10.1002/hyp.11143 en Volume 31, Número 9, Pags. 1749-1759 Restrito Hydrological Processes |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Drought Evapotranspiration Forestry Moisture Soil Moisture Soil Testing Soils Amazonia Amazonian Rainforest Deep Roots Distinctive Layers Fundamental Mechanisms Physical Soil Properties Situ Soil Moistures Soil Water Dynamics Soil Surveys Drought Evapotranspiration Physical Property Soil Moisture Soil Profile Soil Water Water Uptake Amazonia |
| spellingShingle |
Drought Evapotranspiration Forestry Moisture Soil Moisture Soil Testing Soils Amazonia Amazonian Rainforest Deep Roots Distinctive Layers Fundamental Mechanisms Physical Soil Properties Situ Soil Moistures Soil Water Dynamics Soil Surveys Drought Evapotranspiration Physical Property Soil Moisture Soil Profile Soil Water Water Uptake Amazonia Broedel, Elisângela Deep soil water dynamics in an undisturbed primary forest in central Amazonia: Differences between normal years and the 2005 drought |
| topic_facet |
Drought Evapotranspiration Forestry Moisture Soil Moisture Soil Testing Soils Amazonia Amazonian Rainforest Deep Roots Distinctive Layers Fundamental Mechanisms Physical Soil Properties Situ Soil Moistures Soil Water Dynamics Soil Surveys Drought Evapotranspiration Physical Property Soil Moisture Soil Profile Soil Water Water Uptake Amazonia |
| description |
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 880 cm 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 1,430 cm suggest that, in the study site, the top 480 cm 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 480 cm. 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. Copyright © 2017 John Wiley & Sons, Ltd. |
| format |
Artigo |
| author |
Broedel, Elisângela |
| author2 |
Tomasella, J. Cândido, Luiz Antônio Von Randow, Celso |
| author2Str |
Tomasella, J. Cândido, Luiz Antônio Von Randow, Celso |
| title |
Deep soil water dynamics in an undisturbed primary forest in central Amazonia: Differences between normal years and the 2005 drought |
| title_short |
Deep soil water dynamics in an undisturbed primary forest in central Amazonia: Differences between normal years and the 2005 drought |
| title_full |
Deep soil water dynamics in an undisturbed primary forest in central Amazonia: Differences between normal years and the 2005 drought |
| title_fullStr |
Deep soil water dynamics in an undisturbed primary forest in central Amazonia: Differences between normal years and the 2005 drought |
| title_full_unstemmed |
Deep soil water dynamics in an undisturbed primary forest in central Amazonia: Differences between normal years and the 2005 drought |
| title_sort |
deep soil water dynamics in an undisturbed primary forest in central amazonia: differences between normal years and the 2005 drought |
| publisher |
Hydrological Processes |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/17124 |
| _version_ |
1787145270242312192 |
| score |
11.653393 |