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

Actions

This study is summarised as evidence for the following.

Action Category

Soil: Exclude grazers

Action Link
Mediterranean Farmland

Other biodiversity: Exclude grazers

Action Link
Mediterranean Farmland
  1. Soil: Exclude grazers

    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.

     

  2. Other biodiversity: Exclude grazers

    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.

     

Output references

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