Book contents
- Frontmatter
- Contents
- List of contributors
- Foreword
- Preface
- Acknowledgements
- Part I General perspectives
- Part II Regional floristic and animal diversity
- Part III Hydrometeorology of tropical montane cloud forest
- Part IV Nutrient dynamics in tropical montane cloud forests
- Part V Cloud forest water use, photosynthesis, and effects of forest conversion
- 47 Transpiration and microclimate of a tropical montane rain forest, southern Ecuador
- 48 Physiological variation in Hawaiian Metrosideros polymorpha across a range of habitats: from dry forests to cloud forests
- 49 Environmental controls on photosynthetic rates of lower montane cloud forest vegetation in south-western Colombia
- 50 Comparative water budgets of a lower and an upper montane cloud forest in the Wet Tropics of northern Australia
- 51 Effects of forest disturbance and regeneration on net precipitation and soil water dynamics in tropical montane rain forest on Mount Kilimanjaro, Tanzania
- 52 Changes in soil physical properties after conversion of tropical montane cloud forest to pasture in northern Costa Rica
- 53 Hydrology and land-cover change in tropical montane environments: the impact of pattern on process
- Part VI Effects of climate variability and climate change
- Part VII Cloud forest conservation, restoration, and management issues
- References
52 - Changes in soil physical properties after conversion of tropical montane cloud forest to pasture in northern Costa Rica
from Part V - Cloud forest water use, photosynthesis, and effects of forest conversion
Published online by Cambridge University Press: 03 May 2011
Book contents
- Frontmatter
- Contents
- List of contributors
- Foreword
- Preface
- Acknowledgements
- Part I General perspectives
- Part II Regional floristic and animal diversity
- Part III Hydrometeorology of tropical montane cloud forest
- Part IV Nutrient dynamics in tropical montane cloud forests
- Part V Cloud forest water use, photosynthesis, and effects of forest conversion
- 47 Transpiration and microclimate of a tropical montane rain forest, southern Ecuador
- 48 Physiological variation in Hawaiian Metrosideros polymorpha across a range of habitats: from dry forests to cloud forests
- 49 Environmental controls on photosynthetic rates of lower montane cloud forest vegetation in south-western Colombia
- 50 Comparative water budgets of a lower and an upper montane cloud forest in the Wet Tropics of northern Australia
- 51 Effects of forest disturbance and regeneration on net precipitation and soil water dynamics in tropical montane rain forest on Mount Kilimanjaro, Tanzania
- 52 Changes in soil physical properties after conversion of tropical montane cloud forest to pasture in northern Costa Rica
- 53 Hydrology and land-cover change in tropical montane environments: the impact of pattern on process
- Part VI Effects of climate variability and climate change
- Part VII Cloud forest conservation, restoration, and management issues
- References
Summary
ABSTRACT
Within the framework of a larger project studying the hydrological impacts of converting tropical montane cloud forest to pasture in the Tilarán range of northern Costa Rica, physical and hydraulic properties of various volcanic soils were compared in two small watersheds covered with mature lower montane cloud forest and pasture, respectively. In situ and laboratory experiments were conducted to determine trends in soil texture, bulk density, porosity, water retention characteristics, infiltration, and (un)saturated hydraulic conductivities with depth under the two types of land cover. Despite their predominantly sandy texture, the soils were rich in organic matter and non-crystalline material such as allophane. Bulk densities were very low and similar between sites for corresponding soil horizons, except for the pasture top-soil which was more compacted, particularly on cow trails. Soil porosity was very high throughout the profile and dominated by macro- and mesopores, again with the exception of the pasture top-soil and the cow trails. Water retention at a suction of 1500 kPa (permanent wilting point) was very high, except in gravelly C-horizons which had low retention capacity. Amounts of plant-available water (i.e. held at suctions between 10 and 1500 kPa) were also high. Surface infiltration rates were relatively high and dominated by “bypass” flow via macropores in the gravelly horizon (at 20–30 cm depth). Spatial variability in infiltration rates was high in the pasture but less in the forest. Saturated hydraulic conductivity at the soil surface was high in general but considerably reduced in the pasture. […]
- Type
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- Information
- Tropical Montane Cloud ForestsScience for Conservation and Management, pp. 502 - 515Publisher: Cambridge University PressPrint publication year: 2011
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