|
|
|
|
|
| Abbink-Meijerink, Corry G.; Bruinsma, John H.P.; Odé, Baudewijn. |
| Callitriche palustris is very rare in the Netherlands. The last recent records were from 1953 and 1979. Therefore it is quite remarkable that in 1999 and 2000 C. palustris was found at several locations by independent observers: 1. Poached clay overlying sandy soils along the river Vecht which flooded during extremely high water; 2. Ditches in low-lying parts of a clay polder. The ditches are probably fed by a combination of precipitation and inflow from the river Rhine; 3. The dried up bank of an oxbow of the river IJssel, in riparian grassland under intensive agriculture; 4. Silt exposed after spring flooding on the edge of the IJsselmeer; 5. The sandy margin of a lake in the floodplain of the river Waal. The authors suggest that these recent records do... |
| Tipo: Article / Letter to the editor |
|
| Ano: 2001 |
URL: http://www.repository.naturalis.nl/record/527060 |
| |
|
|
| Bruinsma, John H.P.. |
| During the last two decades Potamogeton trichoides has increased considerably in the southern part of the Netherlands, on Pleistocene subsoils, in the middle and lower stretches of lowland streams and drains. It grows in eutrophic, neutral to alkaline water partly let in from large rivers, that is polluted by agriculture as well as by sewage purification installations. The streambed usally consists of sandy soil, often covered with thin sapropelium. Elsewhere in the Netherlands the species is usually found in less eutrophic environments, in polder ditches with stagnant water on clayey or loamy soil. It is often found on places with seepage water. Elsewhere, the species has been observed in streams in Belgium, Germany and in Hungary. Plants in flowing water... |
| Tipo: Article / Letter to the editor |
|
| Ano: 1996 |
URL: http://www.repository.naturalis.nl/record/527118 |
| |
|
|
|
