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. 2022 Jan 21;17(1):e0250136. doi: 10.1371/journal.pone.0250136

Table 3. Plant species richness (S), species diversity (H’ and exp H’), similarity (CS), wetland species prevalence indices (WPI), and dominant species and cover (%) for paired exclosed (ungrazed) and grazed stream reaches in northeastern Oregon.

Site S H’ exp H’ CS WPI Dominant species (% cover)
Bear
Exclosed 40 3.10 22.10 0.62 2.82 Poa pratensis (10), Fragaria virginiana (10), Carex pellita (9)
Grazed 41 3.02 20.54 3.00 Equisetum arvense (19), Trifolium repens (16), Poa pratensis (15)
Camas
Exclosed 45 3.17 23.83 0.55 2.73 Poa pratensis (19), Carex pellita (7), Juncus balticus (5)
Grazed 45 3.11 22.42 2.89 Poa pratensis (15), Trifolium repens (7), Phleum pratense (7)
Chesnimnus
Exclosed 45 2.80 16.48 0.41 2.60 Equisetum arvense (30), Poa pratensis (22), Salix fragilis (18)
Grazed 36 2.61 13.54 3.28 Poa pratensis (27), Pseudotsuga menziesii (11), Trifolium repens (11)
Devils
Exclosed 45 2.90 18.09 0.35 2.68 Myosotis scorpiodes (32), Agrostis stolonifera (15), Alnus incana (10)
Grazed 28 2.17 8.76 3.57 Poa pratensis (37), Trifolium repens (19), Phleum pratense (17)
Lower Swamp
Exclosed 36 2.74 15.50 0.34 2.50 Agrostis stolonifera (25), Carex utriculata (20), Alnus incana (18)
Grazed 34 2.02 7.50 3.04 Alnus incana (52), Poa pratensis (49), Agrostis stolonifera (10)
Upper Swamp
Exclosed 35 2.92 18.46 0.42 2.46 Agrostis stolonifera (18), Erigeron philadelphicus (15), Alnus incana (13)
Grazed 30 2.67 14.37 2.53 Juncus balticus (13), Poa pratensis (9), Trifolium repens (9)
Mid Fk J. Day
Exclosed 32 2.68 14.62 0.34 2.11 Carex pellita (30), Solidago lepida (15), Deschampsia cespitosa (15)
Grazed 23 1.55 4.71 3.71 Poa pratensis (64), Solidago lepida (11), Carex pellita (10)
Murderers
Exclosed 32 2.54 12.70 0.59 1.86 Juncus balticus (44), Poa pratensis (23), Carex utriculata (21)
Grazed 21 1.74 5.45 1.63 Juncus balticus (67), Carex nebrascensis (27), Poa pratensis (24)
Summit
Exclosed 37 2.88 17.74 0.38 1.95 Carex nebrascensis (19), Carex pellita (16), Carex utriculata (14)
Grazed 29 2.21 9.12 3.32 Trifolium longipes (31), Poa pratensis (10), Carex pellita (9)
Tex
Exclosed 36 2.63 13.86 0.73 2.76 Alnus incana (54), Poa pratensis (16), Symphyotrichum foliaceus (11)
Grazed 39 2.53 12.59 2.92 Alnus incana (40), Poa pratensis (14), Equisetum arvense (8)
Camp
Exclosed 51 3.01 20.21 0.63 2.86 Poa pratensis (34), Alnus incana (30), Juncus balticus (24)
Grazed 41 2.80 16.50 3.15 Poa pratensis (51), Trifolium longipes (26), Juncus balticus (16)
p-value 0.08 0.002 0.004 0.01