Biological phosphorus cycling in dryland regions
The relatively few studies done on phosphorus (P) cycling in arid and semiarid lands (drylands) show many factors that distinguish P cycling in drylands from that in more mesic regions. In drylands, most biologically relevant P inputs and losses are from the deposition and loss of dust. Horizontal and vertical redistribution of P is an important process. P is concentrated at the soil surface and thus vulnerable to loss via erosion. High pH and CaCO3 limit P bioavailability, and low rainfall limits microbe and plant ability to free abiotically bound P via exudates, thus making it available for uptake. Many invasive plants are able to access recalcitrant P more effectively than are native plants. As P availability depends on soil moisture and temperature, climate change is expected to have large impacts on P cycling.
Citation Information
Publication Year | 2011 |
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Title | Biological phosphorus cycling in dryland regions |
DOI | 10.1007/978-3-642-15271-9_15 |
Authors | Jayne Belnap |
Publication Type | Book Chapter |
Publication Subtype | Book Chapter |
Index ID | 70156446 |
Record Source | USGS Publications Warehouse |
USGS Organization | Southwest Biological Science Center |