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| Web URL(s): | http://www.nrcresearchpress.com/doi/pdf/10.1139/b01-080
Last checked: 09/30/2015
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Naumberg, Elke;
DeWald, Laura E.;
Kolb, Thomas E. |
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| Author Affiliation: | School of Forestry, Northern Arizona University, Flagstaff, AZ |
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| Title: | Shade responses of five grasses native to southwestern U.S. Pinus ponderosa forests |
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| Source: | Canadian Journal of Botany. Vol. 79, No. 9, September 2001, p. 1001-1009. |
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| Publishing Information: | Vancouver, British Columbia: The National Research Council of Canada. |
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| # of Pages: | 9 |
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| Related Web URL: | http://www.nrcresearchpress.com/doi/abs/10.1139/b01-080
Last checked: 09/30/2015
Notes: English abstract only |
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| Keywords: | TIC Keywords: Shade; Native grasses; Trees; Light penetration; Gas exchange; Biomass; Reproductive fertility; Blepharoneuron tricholepis; Koeleria macrantha; Festuca arizonica; Muhlenbergia montana; Elymus elymoides; Canopy; Overshading; Geographical distribution
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| Geographic Terms: | Southwestern United States |
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| Abstract/Contents: | "Recent increases in Pinus ponderosa Dougl. ex Laws, forest density in the southwestern United States have severely reduced understory herbaceous biomass and altered understory species composition. To examine whether changes in graminoid species composition are caused by increased shading, we studied the effects of shade on leaf grass exchange, biomass, and reproductive characteristics of five grass species native to Arizona P. ponderosa forests in a greenhouse study. Blepharoneuron tricholepis (Nash) Torr., Koeleria cristata (L.) Pers., Festuca arizonica Vasey, Muhlenbergia montana (Nutt.) Hitche., and Sitanion hystrix (Nutt.) J.G. Smith were grown under the three light levels representative of photosynthetic photon flux densities and red/far-red ratios that occue beneath P. ponderosa canopies. In general, all species grew better under unshaded conditions, but all survived and flowered even under the dense shade treatment. Reduction of net assimilation rate by shading was the strongest during early reproductive shoot growth for all species except K. cristata, whose assimilation rate was unaffected by shading. Biomass allocation and reproductive responses to shading variedamong species. Biomass of S. hystrix was the least affected by shading of all species, and it showed no response in biomass allocation to reproduction but increased height and weight of individual flower stalks under shade. Overall, S. hystrix and K. cristana, species that occur in dense P. ponderosa stands, were least affected by environmental shading, which suggests that shade is a contributing factor to the distribution of grass species in Arizona P. ponderosa forests." |
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| Language: | English |
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| References: | 66 |
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| Note: | Abstract also appears in French
Tables
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Naumberg, E., L. E. DeWald, and T. E. Kolb. 2001. Shade responses of five grasses native to southwestern U.S. Pinus ponderosa forests. Can. J. Bot. 79(9):p. 1001-1009. |
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| Web URL(s):
http://www.nrcresearchpress.com/doi/pdf/10.1139/b01-080
Last checked: 09/30/2015
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: QK 1 .C3 |
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