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Providing evidence to improve practice

Individual study: Summer irrigation, grazing and seed addition differentially influence community composition in an invaded serpentine grassland

Published source details

Funk J.L., Hoffacker M.K. & Matzek V. (2015) Summer irrigation, grazing and seed addition differentially influence community composition in an invaded serpentine grassland. Restoration Ecology, 23, 122-130


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Soil: Exclude grazers Mediterranean Farmland

A replicated, controlled study in 2012–2013 in grasslands in central California, USA, found less soil nitrogen in plots with cattle excluded, compared to grazed plots. Nutrients: Less soil nitrogen was found in ungrazed plots, compared to grazed plots (14–16 vs 17–24 mg NH4 and NO3 combined). Methods: Sixty 1 x 1 m plots were established in summer 2012: half in an area grazed at 0.25 cow-calf pairs/ha, and half in an area fenced in 2012 to exclude cattle. Soil cores (5 cm diameter, 0–10 cm depth) were collected in April 2013.

 

Other biodiversity: Exclude grazers Mediterranean Farmland

A replicated controlled study in 2012–2013 in grasslands in central California, USA, found fewer species but higher cover of native plants in plots not grazed by cattle, compared to grazed plots. Cover of invasive species and the emergence of native seedlings did not differ between grazed and ungrazed plots. Plants: Fewer species of native plants were found in plots from which cattle were excluded, compared to grazed plots (8.5–8.8 vs 10.2 species/m2). The same number of native seedlings emerged in grazed and ungrazed plots (0–1.1 seedlings/m2). Cover of native plants was higher in plots from which cattle were excluded, compared to grazed plots (72–83% vs 55–65% cover). Cover of invasive species did not differ between grazed and ungrazed plots (18–29% cover). Methods: Sixty 1 x 1 m plots were established in summer 2012: half in an area grazed at 0.25 cow-calf pairs/ha and half in an area fenced in 2012 to exclude cattle. Plant species and cover was assessed once in 2013.