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
50 - Comparative water budgets of a lower and an upper montane cloud forest in the Wet Tropics of northern Australia
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
This chapter presents a comparison of the water budgets of a lower and an upper montane cloud forest in Australia's Wet Tropics region based on field measurements of rainfall, throughfall (TF), stemflow (SF), transpiration, and cloud water interception (CWI). The proportions of total precipitation measured as TF and SF varied between the two sites. At the lower montane cloud forest site (Upper Barron), SF was 7% while TF was just 64%. The upper montane cloud forest site (Bellenden Ker) showed higher SF at 10% while TF was also high at 83%. CWI at the two sites was quantified using a wet-canopy water balance methodology and was found to contribute up to 65% of the monthly water input during dry season months. At Upper Barron, CWI was 19% of average annual precipitation while at Bellenden Ker it was as much as 29%. These measurements resulted in an overall canopy interception evaporation loss of 29% at Upper Barron and just 7% at Bellenden Ker. About 20% of total precipitation was lost through transpiration at Upper Barron and just 5% at Bellenden Ker. Transpiration losses were less than water losses through wet-canopy evaporation at both sites. Both sites have a large annual net surplus of water to sustain streamflow and groundwater recharge. Total evaporation losses at Upper Barron accounted for about 50% of total precipitation input, leaving 50% for runoff and groundwater recharge. […]
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- Information
- Tropical Montane Cloud ForestsScience for Conservation and Management, pp. 479 - 490Publisher: Cambridge University PressPrint publication year: 2011
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