Book contents
- Frontmatter
- Contents
- List of contributors
- Preface
- Introduction
- 1 Large herbivores across biomes
- 2 Living in a seasonal environment
- 3 Linking functional responses and foraging behaviour to population dynamics
- 4 Impacts of large herbivores on plant community structure and dynamics
- 5 Long‐term effects of herbivory on plant diversity and functional types in arid ecosystems
- 6 The influence of large herbivores on tree recruitment and forest dynamics
- 7 Large herbivores: missing partners of western European light‐demanding tree and shrub species?
- 8 Frugivory in large mammalian herbivores
- 9 Large herbivores as sources of disturbance in ecosystems
- 10 The roles of large herbivores in ecosystem nutrient cycles
- 11 Large herbivores in heterogeneous grassland ecosystems
- 12 Modelling of large herbivore–vegetation interactions in a landscape context
- 13 Effects of large herbivores on other fauna
- 14 The future role of large carnivores in terrestrial trophic interactions: the northern temperate view
- 15 Restoring the functions of grazed ecosystems
- 16 Themes and future directions in herbivore‐ecosystem interactions and conservation
- Index
- References
2 - Living in a seasonal environment
Published online by Cambridge University Press: 16 November 2009
- Frontmatter
- Contents
- List of contributors
- Preface
- Introduction
- 1 Large herbivores across biomes
- 2 Living in a seasonal environment
- 3 Linking functional responses and foraging behaviour to population dynamics
- 4 Impacts of large herbivores on plant community structure and dynamics
- 5 Long‐term effects of herbivory on plant diversity and functional types in arid ecosystems
- 6 The influence of large herbivores on tree recruitment and forest dynamics
- 7 Large herbivores: missing partners of western European light‐demanding tree and shrub species?
- 8 Frugivory in large mammalian herbivores
- 9 Large herbivores as sources of disturbance in ecosystems
- 10 The roles of large herbivores in ecosystem nutrient cycles
- 11 Large herbivores in heterogeneous grassland ecosystems
- 12 Modelling of large herbivore–vegetation interactions in a landscape context
- 13 Effects of large herbivores on other fauna
- 14 The future role of large carnivores in terrestrial trophic interactions: the northern temperate view
- 15 Restoring the functions of grazed ecosystems
- 16 Themes and future directions in herbivore‐ecosystem interactions and conservation
- Index
- References
Summary
INTRODUCTION
Accentuated seasons are a common phenomenon in large parts of the globe. This typically involves a pulse of plant growth during the favourable season, and an extended unfavourable season with no plant growth, which may be due to temperature variations in high latitudes or water limitations in arid environments. The consequences for large herbivores will be one season with abundant food resources and another season with very low food resources. This is especially pronounced in northern high latitudes where the favourable season can be as short as a month or less.
Polar areas receive less solar radiation than other parts of the globe on an annual basis, and this radiation is also to a large part lost to space due to reflection by clouds, snow and ice. This radiation imbalance gives low temperatures and low annual primary productivity. However, solar radiation levels vary greatly between seasons; in the summer the poles receive higher levels of radiation than any other place on Earth, whereas there may be a total lack of incoming solar radiation during winter. As plants experience 24 hours of daylight during summer, productivity on a daily basis may be very high in areas where the geology and topography are favourable for weathering and the transport of nutrients. Thus the pulsed plant growth may be of short duration but very strong.
The large annual variation in plant growth imposes constraints on herbivores as life history tactics must be adjusted to fit the seasonal pattern of the system.
- Type
- Chapter
- Information
- Publisher: Cambridge University PressPrint publication year: 2006
References
- 15
- Cited by