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Book chapter
Effects of nitrogen deposition on soil nitrogen transformations in forest ecosystems
Atmospheric Nitrogen Deposition to Global Forests, pp.119-131
Academic Press
2024
Abstract
Nitrogen (N) deposition can alter N availability, soil pH, and microbial activity and composition in soils, which directly and indirectly affects soil N transformations and influences forest ecosystem processes and functions. Understanding the effects of N deposition on soil N transformations in forest ecosystems has important implications for the ecological and environmental impacts of N deposition. In this chapter, the effects of N deposition on net and gross soil N transformations are synthesized based on the published literature. Results show that N deposition increases both net and gross soil N mineralization and nitrification rates, but do not affect gross NH4+ immobilization rates and gross NO3− immobilization rates. Responses of soil N transformations to N deposition varied depending on climate (such as mean annual precipitation, mean annual temperature, climate region), environmental factors (especially ambient atmospheric N deposition rate), soil properties (soil C:N, soil pH, soil horizon), and experimental N addition (e.g., chemical form of N, N addition duration). The duration of N addition plays an important role affecting the responses of soil N transformations to such additions. Thus, the temporal changes in the effects of N deposition are specifically reviewed based on several case studies. In future research, the observations under long-term time scales are needed to clarify the effects of N deposition on soil N transformations in forest ecosystems. In addition, the role of microbes in the responses of soil N transformations to N deposition also should be investigated.
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Details
- Title
- Effects of nitrogen deposition on soil nitrogen transformations in forest ecosystems
- Publication Details
- Atmospheric Nitrogen Deposition to Global Forests, pp.119-131
- Resource Type
- Book chapter
- Publisher
- Academic Press
- Copyright
- © Academic Press
- Identifiers
- 99380473897206600
- Academic Unit
- Biology; Hal Marcus College of Science and Engineering
- Language
- English