Table 2.
Numbers of emergent seedlings observed in North Kimberley rock pools (in situ seedling survey), and recorded from field capacity sediments incubated at constant 35 °C and exposed to 12/12 h light/dark conditions (ex situ incubated sediments)
| Family | Species |
In situ seedling survey: seedlings per quadrat |
Ex situ incubated sediments: seedling emergence |
|||||
|---|---|---|---|---|---|---|---|---|
| % quadrats | Mean ± s.e. | Maximum | % samples | Total | Mean ± s.e. | Maximum | ||
| Centrolepidaceae | Centrolepis exserta (R.Br.) Roem. & Schult. | 4 ·3 | 1 ·4 ± 0 ·1 | 3 | 2 ·0 | 17 | 2 ·8 ± 0 ·8 | 6 |
| Eriocaulaceae | Eriocaulon scullionii G.J.Leach | 3 ·0 | 16 ·2 ± 2 ·4 | 64 | 3 ·7 | 447 | 20 ·3 ± 3 ·0 | 49 |
| Eriocaulon sp. Morgan River (A.T.Cross 62) | 70 ·9 | 218 ·1 ± 8 ·8 | 1363 | 82 ·8 | 95,566 | 203 ·8 ± 13 ·6 | 2317 | |
| Haloragaceae | Myriophyllum callitrichoides subsp. striatum Orchard | 13 ·7 | 159 ·4 ± 18 ·0 | 1102 | 7 ·6 | 5042 | 105 ·1 ± 28 ·2 | 831 |
| Myriophyllum sp. Harding Range (M.D.Barrett and R.L.Barrett MDB 1825) | 16 ·3 | 138 ·4 ± 12 ·9 | 906 | 7 ·3 | 3505 | 77 ·9 ± 21 ·1 | 593 | |
| Isoetaceae | Isoetes coromandelina subsp. macrotuberculata C.R.Marsden* | 0 ·5 | 1 ·2 ± 0 ·1 | 2 | 0 ·3 | 1 | 1 ·0 ± 1 ·0 | 1 |
| Phrymaceae | Microcarpaea minima (Retz.) Merr. | 1 ·5 | 470 ·7 ± 53 ·6 | 987 | 2 ·9 | 9319 | 776 ·6 ± 152 ·6 | 1703 |
| Poaceae | Micraira brevis subsp. Theda (M.D.Barrett 1505) | 2 ·5 | 0 ·0 ± 0 ·0 | 0 | 0 ·0 | 0 | 0 ·0 ± 0 ·0 | 0 |
| Micraira lazaridis L.G.Clark, Wendel & Craven | 7 ·0 | 0 ·0 ± 0 ·0 | 0 | 0 ·0 | 0 | 0 ·0 ± 0 ·0 | 0 | |
| Portulacaceae | Portulaca bicolor F.Muell. | 1 ·8 | 1 ·8 ± 0 ·1 | 3 | 2 ·1 | 241 | 12 ·0 ± 2 ·1 | 31 |
| Portulaca sp. rock pools (K.A.Menkhorst 310) | 6 ·0 | 14 ·8 ± 3 ·3 | 214 | 8 ·9 | 1323 | 11 ·6 ± 2 ·9 | 219 | |
In situ surveys involved placing five quadrats randomly along two perpendicular transects in each of 11 rock pools (total vegetated quadrats: n = 1066). Sediments from 27 randomly selected rock pools were tested in incubator trials, with ten replicates per pool (n = 270).
% quadrats, species occurrence in quadrats as a percentage of total quadrats; % samples, seedling emergence from incubated sediment replicates as a percentage of total replicates.
Mean ± s.e. and maximum values of seedling density in situ and seedling emergence from incubated sediments are presented.
*Seedling count indicates the number of sporophytes per quadrat for Isoetes coromandelina subsp. macrotuberculata.