The Fescue Grassland in Saskatchewan

Coupland, R. T.; Brayshaw, T. C.

doi:10.2307/1930904

Cited by 91 publications

(45 citation statements)

References 9 publications

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“…Since 1986 various parts of the prairie have been burned by prescribed fires, and the impacts of these fires on the vegetation have been described in Redmann et al (1993), Romo et al (1993), Romo (1994, 1995), Archibold et al (1998) and Ripley and Archibold (1999 Pylypec (1986). Climate in this area has been described by Walter andLieth (1960-1967) (Coupland and Brayshaw 1953) and also of Northern Mixed Prairie (Coupland 1950), and were adjacent to similar controls where no fire has been recorded for the past eight decades.…”

Section: Study Sitesupporting

confidence: 65%

Long-term effects of burning Festuca and Stipa-Agropyron grasslands

Pylypec¹,

Romo²

2003

REM

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The effects of early spring burning on current year standing crop, litter, and total standing crop (current year standing crop plus litter) were examined in Festuca-and Stipa-Agropyron-dominated communities in central Saskatchewan over an 11-year period in a paired design with burned sites compared to adjacent control sites that were not burned. In Festuca communities current year standing crop was reduced in the first and third years (P = 0.010) after burning. Burning Stipa-Agropyron-communities tended to reduce current year standing crop, but the differences were not significant (P < 0.050) compared to control. Increasing precipitation stimulated current year standing crop after burning Festuca (P < 0.001, r2 = 0.33) and Stipa-Agropyron (P < 0.001, r2 = 0.55) communities. Litter and current year standing crop were correlated (R2 = 0.24, P = 0.002) for Festuca indicating beneficial and detrimental effects of litter on production at low and high amounts, respectively. Litter and current year standing crop were not correlated (P = 0.964) for Stipa-Agropyron. In both communities total standing crop increased until about the eighth year after burning while the mass of litter appeared to reach a plateau around 11 years. Litter alters the microenvironment of grasslands and affects productivity (Willms 1988, Facelli andPickett 1991). Whereas excessive litter reduces productivity in Tallgrass Prairie (Vogl 1974, Boemer 1982, litter has positive effects on herbage production apparently by reducing evaporation and making more Manuscript accepted 11 Mar. 03. ResumenSe examinaron los efectos de la quema a inicios de primavera sobre la cosecha en pie actual, mantillo y cosecha en pie total (cosecha en pie del ano actual + mantillo) de comunidades de Festuca y comunidades dominadas por Stipa-Agropyron situadas en la region central de Saskatchewan. El estudio se llevo a cabo en un periodo de 11 anos en un diseno apareado con sitios quemados adyacentes a sitios control que no fueron quemados. En las comunidades de Festuca la cosecha en pie actual se redujo en el primer y tercer anos (P = 0.010) despues de la quema. La quema de comunidades de Stipa-Agropyron tendio a reducir la cosecha en pie del ano actual, pero las diferencias no fueron significativas (P < 0.050) en comparacion con el control. El aumento en la precipitacion estimulo la cosecha en pie del presente ano despues de la quema en las comunidades de Festuca (P < 0.001, r2 = 0.33) y Stipa-Agropyron (P < 0.001, r2=0.55). El mantillo y la cosecha en pie actual estuvieron correlacionadas (R2 = 0.24, P = 0.002) en la comunidad de Festuca, indicando efectos beneficos y detrimentales del mantillo en la production en cantidades bajas y altas respectivamente. El mantillo y la cosecha en pie actual no estuvieron correlacionadas (P = 0.964) en la comunidad de StipaAgropyron. En ambas comunidades la cosecha en pie total se incremento hasta aproximadamente el octavo ano despues de la quema mientras que la masa de mantillo parecio alcanzar su maximo nivel alrededor de los ...

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Section: Study Sitesupporting

confidence: 65%

Long-term effects of burning Festuca and Stipa-Agropyron grasslands

Pylypec¹,

Romo²

2003

REM

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“…All of these species, with the exception of F. scabrella, are common rough fescue grassland species (Coupland and Brayshaw 1953). F. scabrella is closely related to the Festuca hallii found in rough fescue grasslands.…”

Section: Methodsmentioning

confidence: 95%

Effects of plant species richness and evenness on soil microbial community diversity and function

2010

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Understanding the links between plant diversity and soil communities is critical to disentangling the mechanisms by which plant communities modulate ecosystem function. Experimental plant communities varying in species richness, evenness, and density were established using a response surface design and soil community properties including bacterial and archaeal abundance, richness, and evenness were measured. The potential to perform a representative soil ecosystem function, oxidation of ammonium to nitrite, was measured via archaeal and bacterial amoA genes. Structural equation modeling was used to explore the direct and indirect effects of the plant community on soil diversity and potential function. Plant communities influenced archaea and bacteria via different pathways. Species richness and evenness had significant direct effects on soil microbial community structure, but the mechanisms driving these effects did not include either root biomass or the pools of carbon and nitrogen available to the soil microbial community. Species richness had direct positive effects on archaeal amoA prevalence, but only indirect impacts on bacterial communities through modulation of plant evenness. Increased plant evenness increased bacterial abundance which in turn increased bacterial amoA abundance. These results suggest that plant community evenness may have a strong impact on some aspects of soil ecosystem function. We show that a more even plant community increased bacterial abundance, which then increased the potential for bacterial nitrification. A more even plant community also increased total dissolved nitrogen in the soil, which decreased the potential for archaeal nitrification. The role of plant evenness in structuring the soil community suggests mechanisms including complementarity in root exudate profiles or root foraging patterns.

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“…The topography is undulating, varying in elevation from 1280 m to 1420 m above sea level. The vegetation is fescue grassland, as described by Coupland and Brayshaw (1953). Rough fescue is the dominant species in the climax community but Parry Oat grass (Danthonia parryl Scribn.)…”

Section: Methodsmentioning

confidence: 99%

Responses of herbage and cattle tail switch hair δ¹⁵N value to long-term stocking rates on a rough fescue grassland

Hao

Willms

et al. 2012

Soil Science and Plant Nutrition

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The Fescue Grassland in Saskatchewan

Cited by 91 publications

References 9 publications

Long-term effects of burning Festuca and Stipa-Agropyron grasslands

Long-term effects of burning Festuca and Stipa-Agropyron grasslands

Effects of plant species richness and evenness on soil microbial community diversity and function

Responses of herbage and cattle tail switch hair δ¹⁵N value to long-term stocking rates on a rough fescue grassland

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The Fescue Grassland in Saskatchewan

Cited by 91 publications

References 9 publications

Long-term effects of burning Festuca and Stipa-Agropyron grasslands

Long-term effects of burning Festuca and Stipa-Agropyron grasslands

Effects of plant species richness and evenness on soil microbial community diversity and function

Responses of herbage and cattle tail switch hair δ15N value to long-term stocking rates on a rough fescue grassland

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Responses of herbage and cattle tail switch hair δ¹⁵N value to long-term stocking rates on a rough fescue grassland