Sago Pondweed (Potamogeton pectinatus L.): A Literature Review
Table 2
Table 2. Density and yield (dry wt)a of sago pondweed (Potamogeton
pectinatus L.) propagules under various conditions.
Turions Drupelets
Density Yield Density Yield
(no./m2) (g/m2) (no./m2) (g/m2) Conditions Reference
387 1,960 After dewatering and
carp removal 1
1,033 21.5 Waterfowl and carp present 2
4,909 102 Waterfowl and carp excluded 2
92 4.0 Clay loam substrates 2
59 1.2 Silt substrates 2
12 0.2 Sand substrates 2
1,615 2.9 Salinity 0.84-1.9 g/L 2
few Salinity 7.2-8.25 g/L 2
2,180 4.0 Depth 41-46 cm 2
403 0.73 Depth <8 cm 2
464 Open to waterfowl 3
688 Waterfowl excluded 3
2,390 450 Open to waterfowl 4
192 Mesotrophic 5
100 Eutrophic 5
48 Eutrophic, polluted 5
52 Eutrophic, unpolluted 5
8 Hypereutrophic 5
115 181 Exposed sands 6
45 455 Sheltered muds 6
6.4 0.85 Carp excluded 7
few 7.2 Turbid, carp present 8
103 Waterfowl excluded 9
44 Open to waterfowl 9
629 60 302 1.2 Sheltered, brackish 10
337 22 0.04 Exposed, brackish 10
440 11 20 0.11 Exposed, fresh 10
888 37 0.07 Exposed, fresh-slightly brackish, 10
open to waterfowl
1,784 110 363 5.3 Exposed, fresh-slightly brackish 10
closed to waterfowl
759 13 0 0 Fresh running water 10
750 7 0 0 Fresh running water 10
69 Fresh running water 11
3,975 200 651 2.9 Oligosaline, rising summer water 10
levels, sheltered
1,330 86 806 3.4 Oligosaline, falling summer water 10
levels, sheltered
467 28 1,019 5.8 Oligosaline, 30-45 cm depth, 10
much wave action
495 22 3,707 20.4 Oligosaline, 40-70 cm depth, 10
moderate wave action
aFresh (wet) weight yields were multiplied by 0.13 to obtain dry
weight; data from Van Wijk (1988) were used to convert ash-free dry weight yields
for turions and drupelets to dry weight by multiplying by 1.12 and 1.16, respectively.
b1 = Lutz 1960; 2 = Craner 1964; 3 = Jupp and Spence 1977b; 4 = Jarvis
et al. 1985; 5 = 0zimek et al. 1986; 6 = Kautsky 1987; 7 = Sterlin~ 1970; 8
= Rich 1966; 9 = Anderson and Low 1976; 10 = Van Wijk 1988; 11 = Madsen 1986.
Previous Section-- Table 1
Return to Contents
Next Section-- Table 3