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Where Have the Native Grasses Gone?: What a Long-Term, Repeat Study Can Tell Us about California’s Native Prairie Landscapes Cover

Where Have the Native Grasses Gone?: What a Long-Term, Repeat Study Can Tell Us about California’s Native Prairie Landscapes

Open Access
|Feb 2021

Figures & Tables

Figure 1

Quad locations from the original LJV study by Gale (1983) and Goode (1981) overlaid on historic stands and point locations of relic native bunchgrasses recreated from Barry (1972).2

Figure 2

Location of La Jolla Valley in the Santa Monica Mountains.

Figure 3

Percent relative cover of grasses over time in LJV.

Figure 4

Changes in relative cover of native and exotic grasses, forbs, shrubs, and bare ground.

Table 1

Fisher’s Exact Test for Count Data for increase/decrease in cover of grasses and forbs by quadrat from 1981 to 2015.

Vegetation FormIncreaseDecrease
Grass114
Forbs141

[i] Fisher’s Exact Test.

P-value = 0.08008.

95% CI: 0.002183889 1.190995284.

odds ratio: 1151766.

Table 2

Fisher’s Exact Test for Count Data for increase/decrease in cover of grasses by quadrat from 1981 to 2015.

Vegetation FormIncreaseDecrease
Native Grass114
Non-Native Grass69

[i] Fisher’s Exact Test.

P-value = 0.0001157.

95% CI: 4.268043 2505.233273.

odds ratio: 45.18712.

Figure 5

Percent average cover by category for floor (a, b) and edge (c, d) quadrats 1981–2015.

DOI: https://doi.org/10.16993/rl.61 | Journal eISSN: 2002-0104
Language: English
Page range: 1 - 1
Submitted on: Mar 16, 2020
Accepted on: Jan 16, 2021
Published on: Feb 10, 2021
Published by: Stockholm University Press
In partnership with: Paradigm Publishing Services

© 2021 Paul Laris, Chelsea Seymour, Mystyn Mills, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.