Deer browsing effects on temperate forest soil nitrogen cycling shift from positive to negative across fertility gradients
| Autor: | Knute J. Nadelhoffer, Jacqueline Mechtilde Antoinette Popma |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Global and Planetary Change Nutrient cycle Biogeochemical cycle Herbivore Ecology media_common.quotation_subject Soil nitrogen Temperate forest Forestry Fertility 010603 evolutionary biology 01 natural sciences 010601 ecology Nutrient Environmental science Cycling media_common |
| Zdroj: | Canadian Journal of Forest Research. 50:1281-1288 |
| ISSN: | 1208-6037 0045-5067 |
| Popis: | Herbivores impact soil biogeochemical processes, often increasing nutrient cycling rates under high nutrient availability and decreasing nutrient cycling rates under low nutrient availability. These patterns are far from universal, and interactions between habitat fertility and herbivore effects are under continuing investigation. By sampling inside and outside a network of deer exclosures, we determined deer browsing effects on temperate forest soil nitrogen (N) and carbon (C) cycling along a gradient of soil and litter C–N ratios across our network of sites. Deer browsing increased net N mineralization rates in high nutrient environments and decreased N mineralization rates in low nutrient environments, whereas browsing decreased CO2 respiration rates in high nutrient environments and increased CO2 respiration rates in low nutrient environments. Differences in deer browsing effects on soil processes could be explained by plant responses to herbivory across gradients of resource availability. To our knowledge, our study is one of the first to show that deer browsing can have significant effects on net N mineralization and C respiration in temperate forest soils and that the direction and magnitude of deer browsing effects on soil N and C cycling vary across fertility gradients. |
| Databáze: | OpenAIRE |
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