Table 1. Plant composition of a 2 x 2-meter plot in oldfield habitat of northern
ID: 252267 • Letter: T
Question
Table 1. Plant composition of a 2 x 2-meter plot in oldfield habitat of northern Illinois, sampled in the Fall. Status: N - native, 1 - introduced Species Ambrosia artemissifoli Asclepias syriaca Asclepias verticillata Aster ericoides Aster pilosus Bromus inermis Chrysanthemum leucanthemum Cirsium arevense Convolvulus arvensis Daucus carota Erigeron annus Medicago lupulina Melilotus alba Physalis virginiana Poa pratensis Rumex crispus No. individuals Ht. category"Status Type Forb Forb Forb Forb Forb Grass Forb 10 30 15 20 Forb Forb 25 12 Forb Forb Forb Grass Forb Grass Forb 20 Setaria pumila Solidago altissima Verbascum blattaria 20 Forb Verbascum thapsus Forb Ht. Category legend 0-5 cm 2 5-15 cm 3 15-30 cm 4 30-100 cm 5 100-300 cmExplanation / Answer
Oldfield habitat:
Total number of individuals = 187
Number individuals native species = 3+10+2+30+15+1+4+20+6+1 = 92
Number of individuals with introduced species = 1+5+25+12+1+5+5+1+20 = 95
Number of forbs individuals = 5+25+12+1+5+1+3+10+2+30+15+1+4+20+6+1 = 142
Number of grass individuals =20+5+20 = 45
Number of individuals with height catagory 1 = 1
Number of individuals with height catagory 2 = 37
Number of individuals with height catagory 3 = 62
Number of individuals with height catagory 4 = 66
Number of individuals with height catagory 5 = 21
REstored tallgrass prainie habitat:
Total number of individuals = 227
Number individuals native species = 216
Number of individuals with introduced species = 11
Number of forbs individuals = 121
Number of grass individuals =106
Number of individuals with height catagory 1 = 0
Number of individuals with height catagory 2 = 5
Number of individuals with height catagory 3 = 71
Number of individuals with height catagory 4 = 29
Number of individuals with height catagory 5 = 122
Proportion = Number of individuals / Total individual
10. Proportion of native species in Oldfield habitat = 92/187 = 0.492
Proportion of native species in restored tallgrass prainie habitat = 216/227 = 0.952
Proportion of introduced species in Oldfield habitat = 95/187 = 0.508
Proportion of introduced species in restored tallgrass prainie habitat = 11/227 = 0.048
For native species Oldfield < restored tallgrass prainie.
For Introduced species Oldfield > restored tallgrass prainie.
11. Proportion of forb species in Oldfield habitat = 142/187 = 0.759
Proportion of grass species in Oldfield habitat = 45/187 = 0.241
Proportion of forb species in restored tallgrass prainie habitat = 121/227= 0.533
Proportion of grass species in restored tallgrass prainie habitat = 106/227= 0.467
For forb species Oldfield > restored tallgrass prainie.
For grass species Oldfield < restored tallgrass prainie.
12) Proportion of height catogory in Oldfield habiat:
Proportion = No.of individuals in particular height catagory/Total no.individuals
Height catogory 1 = 1/187 = 0.005
Height catogory 2 = 37/187 = 0.198
Height catogory 3 = 62/187 = 0.332
Height catogory 4 = 66/187 = 0.353
Height catogory 5 = 21/187 = 0.112
Proportion of height catogory in tallgrass prainie habitat:
Proportion = No.of individuals in particular height catagory/Total no.individuals
Height catogory 1 = 0/227= 0
Height catogory 2 = 5/227= 0.022
Height catogory 3 = 71/227= 0.313
Height catogory 4 = 29/227= 0.128
Height catogory 5 = 122/227= 0.537
Height catogory 1: Oldfield > restored tallgrass prainie
Height catogory 2: Oldfield > restored tallgrass prainie
Height catogory 3: Oldfield > restored tallgrass prainie
Height catogory 4: Oldfield < restored tallgrass prainie
Height catogory 5: Oldfield < restored tallgrass prainie
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