The impact of invertebrates to four aquatic macrophytes: Potamogeton nodosus, P. illinoensis, Vallisneria americana and Nymphaea mexicana. Page: 23
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51 Rhodamine 48 3 0.20 1.00 0.80 0.60 0.60
52 Control 16 1 0.30 0.20 0.30 0.20 0.30
52 Control 16 2 0.20 0.30 0.30 0.20 0.30
52 Control 16 3 0.30 0.30 0.30 0.20 0.30
52 Control 32 1 0.30 0.30 0.40 0.20 0.30
52 Control 32 2 0.30 0.30 0.40 0.20 0.30
52 Control 32 3 0.40 0.30 0.40 0.20 0.30
52 Control 48 1 0.40 0.40 0.40 0.20 0.30
52 Control 48 2 0.40 0.30 0.30 0.30 0.30
52 Control 48 3 0.30 0.30 0.30 0.30 0.30
52 Rhodamine 16 1 1.00 1.60 0.80 0.80 0.70
52 Rhodamine 16 2 3.50 1.20 0.80 0.80 0.70
52 Rhodamine 16 3 0.50 0.90 0.90 0.80 0.70
52 Rhodamine 32 1 2.50 2.00 0.80 0.70 0.70
52 Rhodamine 32 2 2.60 1.00 0.80 0.80 0.70
52 Rhodamine 32 3 3.00 2.00 0.90 0.80 0.70
52 Rhodamine 48 1 3.20 1.80 0.90 0.80 0.70
52 Rhodamine 48 2 3.00 1.80 0.90 0.80 0.70
52 Rhodamine 48 3 3.50 1.60 0.90 0.80 0.70
Invertebrate Collections
Harvest and Treatment Effects
Ephemeropterans displayed statistically significant population reductions due to
treatment only (Table 2 & Figure 8a). Power analysis determined that a sample size of
51 replicates would be required to achieve statistically significant results for harvest at a
power of 0.95. Statistical significance was not attained for harvest differences, yet
general trends were noted. Collections from treated areas averaged close to zero
larvae per sample for the entire study. Mayfly collections from non-treated areas, while
also low, peaked at a mean of about 4 larvae per sample at harvest Ill (Figure 8b).23
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Nachtrieb, Julie Graham. The impact of invertebrates to four aquatic macrophytes: Potamogeton nodosus, P. illinoensis, Vallisneria americana and Nymphaea mexicana., thesis, August 2008; Denton, Texas. (https://digital.library.unt.edu/ark:/67531/metadc9058/m1/31/: accessed May 1, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; .