Skip to Main Content
Facilitation and interference of seedling establishment by a native legume before and after wildfireAuthor(s): Erin Goergen; Jeanne C. Chambers
Source: Oecologia. doi: 10.1007/s00442-011-2075-0.
Publication Series: Miscellaneous Publication
View PDF (549.36 KB)
DescriptionIn semi-arid ecosystems, heterogeneous resources can lead to variable seedling recruitment. Existing vegetation can influence seedling establishment by modifying the resource and physical environment. We asked how a native legume, Lupinus argenteus, modifies microenvironments in unburned and burned sagebrush steppe, and if L. argenteus presence facilitates seedling establishment of native species and the non-native annual grass, Bromus tectorum. Field treatments examined mechanisms by which L. argenteus likely influences establishment: (1) live L. argenteus; (2) dead L. argenteus; (3) no L. argenteus; (4) no L. argenteus with L. argenteus litter; (5) no L. argenteus with inert litter; and (6) mock L. argenteus. Response variables included soil nitrogen, moisture, temperature, solar radiation, and seedling establishment of the natives Elymus multisetus and Eriogonum umbellatum, and non-native B. tectorum. In both unburned and burned communities, there was higher spring soil moisture, increased shade and reduced maximum temperatures under L. argenteus canopies. Adult L. argenteus resulted in greater amounts of soil nitrogen (N) only in burned sagebrush steppe, but L. argenteus litter increased soil N under both unburned and burned conditions. Although L. argenteus negatively affected emergence and survival of B. tectorum overall, its presence increased B. tectorum biomass and reproduction in unburned plots. However, L. argenteus had positive facilitative effects on size and survival of E. multisetus in both unburned and burned plots. Our study indicates that L. argenteus can facilitate seedling establishment in semi-arid systems, but net effects depend on the species examined, traits measured, and level of abiotic stress.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationGoergen, Erin; Chambers, Jeanne C. 2011. Facilitation and interference of seedling establishment by a native legume before and after wildfire. Oecologia. doi: 10.1007/s00442-011-2075-0.
KeywordsBromus tectorum, invasion, Lupinus argenteus, nitrogen, sagebrush steppe
- Effects of spring prescribed fire in expanding pinyon-juniper woodlands on seedling establishment of sagebrush species
- Prescribed fire, soil, and plants: burn effects and interactions in the central Great Basin
- Influence of a native legume on soil N and plant response following prescribed fire in sagebrush steppe
XML: View XML