Book contents
- Frontmatter
- Contents
- List of contributors
- Foreword
- Preface
- Acknowledgements
- Part I General perspectives
- 1 Setting the stage
- 2 Modeling the tropics-wide extent and distribution of cloud forest and cloud forest loss, with implications for conservation priority
- 3 The climate of cloud forests
- 4 Changes in mist immersion
- 5 Ecology and ecophysiology of epiphytes in tropical montane cloud forests
- 6 Global and local variations in tropical montane cloud forest soils
- 7 Nutrient cycling and nutrient limitation in tropical montane cloud forests
- 8 What is the state of tropical montane cloud forest restoration?
- 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
- Part VI Effects of climate variability and climate change
- Part VII Cloud forest conservation, restoration, and management issues
- References
7 - Nutrient cycling and nutrient limitation in tropical montane cloud forests
from Part I - General perspectives
Published online by Cambridge University Press: 03 May 2011
- Frontmatter
- Contents
- List of contributors
- Foreword
- Preface
- Acknowledgements
- Part I General perspectives
- 1 Setting the stage
- 2 Modeling the tropics-wide extent and distribution of cloud forest and cloud forest loss, with implications for conservation priority
- 3 The climate of cloud forests
- 4 Changes in mist immersion
- 5 Ecology and ecophysiology of epiphytes in tropical montane cloud forests
- 6 Global and local variations in tropical montane cloud forest soils
- 7 Nutrient cycling and nutrient limitation in tropical montane cloud forests
- 8 What is the state of tropical montane cloud forest restoration?
- 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
- Part VI Effects of climate variability and climate change
- Part VII Cloud forest conservation, restoration, and management issues
- References
Summary
ABSTRACT
In this chapter, the role of nutrient supply and cycling with respect to the characteristically low productivity of tropical montane cloud forests is investigated. Studies of nutrient stocks, turnover rates, and foliar nutrients all suggest that nitrogen supply to vegetation is lower in montane tropical forests than in lowland forests, whereas forest fertilization studies indicate that nitrogen and often phosphorus consistently limit above-ground productivity. Slow rates of nitrogen cycling, rather than low nitrogen inputs, appear to be responsible for the depressed nitrogen supply, and the high soil water content of many cloud-immersed montane forests is likely to be an important ultimate cause of the decreased rates of nitrogen cycling. Hydrological losses of biologically unavailable forms of nitrogen (such as dissolved organic nitrogen) may sustain nitrogen limitation over longer timescales.
INTRODUCTION
Regardless of location, tropical montane cloud forests (TMCF) worldwide share the same basic differences from lowland tropical forests and montane forests not affected by regular fog: lower productivity and diversity, lower canopy heights, thicker leaves with lower nutrient concentrations (especially of nitrogen), and higher soil organic matter and water content. In this chapter, the importance of nutrient availability in controlling this suite of traits is revisited, summarizing recent information on nutrient distribution, availability, and limitation in TMCF. To the extent that low nutrient availability contributes to the TMCF “syndrome,” this chapter discusses whether it is an independent factor or a consequence of other factors that ultimately control the productivity of TMCF.
- Type
- Chapter
- Information
- Tropical Montane Cloud ForestsScience for Conservation and Management, pp. 90 - 100Publisher: Cambridge University PressPrint publication year: 2011
References
- 9
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