Complex edge effects on soil moisture and microclimate in central Amazonian forest
We investigated the influence of a four-year-old forest edge near Manaus, Brazil, on soil moisture and vertical profiles of air vapour pressure deficit (VPD) within the forest. Soil moisture was measured (with a neutron probe) 0, 5, 10, 20, 40, 60, 80, 100, 150 and 200 m into the forest from the edg...
| Autor principal: | Camargo, José Luís Campana |
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| Outros Autores: | Kapos, Valerie |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Journal of Tropical Ecology
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/19446 |
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oai:repositorio:1-19446 |
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oai:repositorio:1-19446 Complex edge effects on soil moisture and microclimate in central Amazonian forest Camargo, José Luís Campana Kapos, Valerie Air Vapour Pressure Deforestation Edge Effect Microclimate Soil Moisture Tropical Forest Vegetation Brazil, Amazonia, Manaus We investigated the influence of a four-year-old forest edge near Manaus, Brazil, on soil moisture and vertical profiles of air vapour pressure deficit (VPD) within the forest. Soil moisture was measured (with a neutron probe) 0, 5, 10, 20, 40, 60, 80, 100, 150 and 200 m into the forest from the edge, in undisturbed control areas, and in the pasture. Control soil moisture was better explained by rainfall in the previous 2 or 10 days than by longer-term totals. Soil water potentials > — 1.5 MPa occurred at some forest locations during the driest period. The variation in soil moisture with distance from the forest edge was complex, with higher values just inside the edge and depleted zones at the edge and 40–80 m inside it. At a given height, VPD (standardized relative to measurements in the open) was not related to distance from the edge, but VPD increased more with height near the edge than in control areas. The complexity of the edge's influence and the contrast with earlier data from the same edge can be explained by the changing vegetation structure near the edge. Regrowth ‘seals’ the edge with more leaves that transpire and deplete soil moisture, while protecting the understorey just inside the edge from desiccating conditions. A mosaic of gaps of differing ages develops behind the edge, increasing the variation in microclimatic conditions near the ground and consequently in evapotranspiration and soil moisture. © 1995, Cambridge University Press. All rights reserved. 2020-06-15T22:08:43Z 2020-06-15T22:08:43Z 1995 Artigo https://repositorio.inpa.gov.br/handle/1/19446 10.1017/S026646740000866X en Volume 11, Número 2, Pags. 205-221 Restrito Journal of Tropical Ecology |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Air Vapour Pressure Deforestation Edge Effect Microclimate Soil Moisture Tropical Forest Vegetation Brazil, Amazonia, Manaus |
| spellingShingle |
Air Vapour Pressure Deforestation Edge Effect Microclimate Soil Moisture Tropical Forest Vegetation Brazil, Amazonia, Manaus Camargo, José Luís Campana Complex edge effects on soil moisture and microclimate in central Amazonian forest |
| topic_facet |
Air Vapour Pressure Deforestation Edge Effect Microclimate Soil Moisture Tropical Forest Vegetation Brazil, Amazonia, Manaus |
| description |
We investigated the influence of a four-year-old forest edge near Manaus, Brazil, on soil moisture and vertical profiles of air vapour pressure deficit (VPD) within the forest. Soil moisture was measured (with a neutron probe) 0, 5, 10, 20, 40, 60, 80, 100, 150 and 200 m into the forest from the edge, in undisturbed control areas, and in the pasture. Control soil moisture was better explained by rainfall in the previous 2 or 10 days than by longer-term totals. Soil water potentials > — 1.5 MPa occurred at some forest locations during the driest period. The variation in soil moisture with distance from the forest edge was complex, with higher values just inside the edge and depleted zones at the edge and 40–80 m inside it. At a given height, VPD (standardized relative to measurements in the open) was not related to distance from the edge, but VPD increased more with height near the edge than in control areas. The complexity of the edge's influence and the contrast with earlier data from the same edge can be explained by the changing vegetation structure near the edge. Regrowth ‘seals’ the edge with more leaves that transpire and deplete soil moisture, while protecting the understorey just inside the edge from desiccating conditions. A mosaic of gaps of differing ages develops behind the edge, increasing the variation in microclimatic conditions near the ground and consequently in evapotranspiration and soil moisture. © 1995, Cambridge University Press. All rights reserved. |
| format |
Artigo |
| author |
Camargo, José Luís Campana |
| author2 |
Kapos, Valerie |
| author2Str |
Kapos, Valerie |
| title |
Complex edge effects on soil moisture and microclimate in central Amazonian forest |
| title_short |
Complex edge effects on soil moisture and microclimate in central Amazonian forest |
| title_full |
Complex edge effects on soil moisture and microclimate in central Amazonian forest |
| title_fullStr |
Complex edge effects on soil moisture and microclimate in central Amazonian forest |
| title_full_unstemmed |
Complex edge effects on soil moisture and microclimate in central Amazonian forest |
| title_sort |
complex edge effects on soil moisture and microclimate in central amazonian forest |
| publisher |
Journal of Tropical Ecology |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/19446 |
| _version_ |
1787143568008151040 |
| score |
11.675608 |