Ecological Archives M071-003-A1

J. C. Randolph and Guy N. Cameron. 2001. Consequences of diet choice by a small generalist herbivore. Ecological Monographs 71: 117-136.

Appendix A. Mean biomass (g dry mass m-2; SE in parentheses) of major foods (as defined by Randolph et al. 1991) during four seasons in three patch types occupied by cotton rats. Values are for foods only, not total plant biomass. Abbreviations are: MO = monocot, MI = mixed, DI = dicot patches types; lgs = lower green stems, ugs = upper green stems, uds = upper dry stems, lds = lower dry stems, gl = green leaves, and f = fruits.

Food

Spring

Summer

Autumn

Winter
Plant Species Plant Part MO MI DI MO MI DI MO MI DI MO MI DI
Schizachyrium scoparium lgs 302.7 62.8 33.9 142.2 57.1 26.7 75.8 38.9 7.6 8.1 3.1 0.3
(21.7) (12.2) (9.2) (20.4) (10.1) (7.4) (7.6) (7.1) (1.6) (0.7) (0.7) (0.1)
ugs 218.4 45.3 24.5 146.8 58.9 27.5 28.7 14.8 2.9 7.8 3.3 0.4
(15.6) (8.8) (16.6) (21.1) (10.4) (7.6) (2.9) (2.7) (0.6) (0.3) (0.8) (0.1)
lds 86.0 44.5 8.7 302.5 117.6 12.4
(8.7) (8.1) (1.8) (25.0) (24.6) (3.9)
uds 41.6 21.5 4.2 304.2 116.2 11.8
(4.2) (3.9) (10.7) (24.0) (22.8) (3.7)
Spartina spartinae lgs 3.8 1.3 7.2 4.7 6.1 19.2 8.4 1.9
(3.2) (0.6) (4.5) (1.9) (4.1) (11.9) (4.3) (1.1)
ugs 2.3 0.8 7.6 4.9 4.9 19.6 8.6 1.9
(1.9) (0.4) (4.8) (2.1) (3.3) (12.2) (4.4) (1.1)
Tripsacum dactyloides lgs 3.7 116.7 82.1 3.5
(2.1) (26.9) (27.2) (1.4)
ugs 3.0 0.3 0.1 143.8 42.9 4.2
(1.6) (0.3) (0.1) (33.2) (14.2) (1.7)
lds 17.3
(7.1)
Ampelopsis arborea gl 0.2 0.3 0.7
(0.2) (0.3) (0.5)
f 0.6 1.1
(0.6) (0.7)
Eupatorium coelestinum gl 0.2 0.7 0.1
(0.1) (0.4) (0.1)
Eupatorium rugosum gl 0.2 3.3 3.2 0.3 1.0 1.5
(0.1) (1.7) (1.5) (0.3) (0.5) (0.8)
Ligustrum sinense f 0.4 0.3
(0.1) (0.1)
Phyla incisa gl 0.1
(0.1)
Rubus trivalis gl 16.4 10.3 4.8 5.2 0.1 8.9 6.3 3.0 1.6
(2.6) (1.4) (0.7) (1.1) (0.1) (1.9) (9.3) (0.7) (0.3)
f 1.9 0.7
(0.5) (0.2)
Solidago sp. gl 0.7 24.2 46.3 0.3 32.2 92.0 3.9 36.3 77.9 1.0
(0.6) (4.1) (5.8) (0.3) (7.0) (8.6) (0.5) (3.9) (10.9) (0.3)
Solidago sempervirens gl 3.1 0.4 1.3 0.3 0.2 0.4 11.3
(1.5) (0.2) (1.0) (0.3) (0.2) (0.2) (3.0)
Verbena rigida gl 0.9 0.1 6.5 8.9 1.9 4.6 2.4 3.4 0.1 1.7
(0.6) (0.1) (2.9) (5.5) (0.8) (2.7) (0.8) (2.6) (0.1) (0.8)
TOTAL 535.5 156.4 122.3 573.5 167.4 159.6 366.3 177.8 112.7 689.8 261.3 43.6


Literature Cited

Randolph, J.C., G.N. Cameron, and J.A. Wrazen. 1991. Dietary choice of a generalist grassland herbivore, Sigmodon hispidus. Journal of Mammalogy 76: 113-1126.


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