Skip to main content
USGS - science for a changing world

Bromus tectorum Invasion Alters Nitrogen Dynamics in an Undisturbed Arid Grassland Ecosystem

Citation

L J Sperry, R David Evans, and Jayne Belnap, Bromus tectorum Invasion Alters Nitrogen Dynamics in an Undisturbed Arid Grassland Ecosystem: .

Summary

The nonnative annual grass Bromus tectorum has successfully replaced native vegetation in many arid and semiarid ecosystems. Initial introductions accompanied grazing and agriculture, making it difficult to separate the effects of invasion from physical disturbance. This study examined N dynamics in two recently invaded, undisturbed vegetation associations (C₃ and C₄). The response of these communities was compared to an invaded/disturbed grassland. The invaded/disturbed communities had higher surface NH₄� input in spring, whereas there were no differences for surface input of NO₃�. Soil inorganic N was dominated by NH₄�, but invaded sites had greater subsurface soil NO₃�. Invaded sites had greater total soil N [...]

Contacts

Attached Files

Click on title to download individual files attached to this item.

metadata.xml 4.03 KB

Communities

  • Upper Colorado River Basin

Tags

Provenance

From Source - Mendeley RIS export <br> On - Tue May 10 10:23:48 CDT 2011

Additional Information

Identifiers

Type Scheme Key
Title Citation Bromus tectorum Invasion Alters Nitrogen Dynamics in an Undisturbed Arid Grassland Ecosystem

Citation Extension

noteNotes
tableOfContentsTable of Contents
citationTypeMendeley

Item Actions

View Item as ...

Save Item as ...

View Item...