|
|
|
|
|
| During, H.J.. |
| The distribution of male, female and sporulating plants of Thamnobryum alopecurum( Hedw.) Nieuwl. [= Thamnium alopecurum (Hedw.) Schimp.] in the Netherlands is given in an attempt to clarify the problem, of why this species sporulates so seldom and in which environment sporophytes are formed most frequently. In places with air with a constantly high humidity the plants bear the largest numbers of inflorescences and in such places female and male plants also grow more strongly intermingled. In places with (periodically) drier air the plants remain mostly sterile or nearly so and develop into large sprouting systems with little contact between each other; even „moss balls” can occur then. Another important point is that in some localities only males or only... |
| Tipo: Article / Letter to the editor |
|
| Ano: 1978 |
URL: http://www.repository.naturalis.nl/record/534908 |
| |
|
| |
|
|
| During, H.J.. |
| The distribution of male, female and sporulating plants of Thamnobryum alopecurum (Hedw.) Nieuwl. [= Thamnium alopecurum (Hedw.) Schimp.] in the Netherlands is given in an attempt to clarify the problem, of why this species sporulates so seldom and in which environment sporophytes are formed most frequently. In places with air with a constantly high humidity the plants bear the largest numbers of inflorescences and in such places female and male plants also grow more strongly intermingled. In places with (periodically) drier air the plants remain mostly sterile or nearly so and develop into large sprouting systems with little contact between each other; even „moss balls” can occur then. Another important point is that in some localities only males or only... |
| Tipo: Article / Letter to the editor |
|
| Ano: 1978 |
URL: http://www.repository.naturalis.nl/record/527459 |
| |
|
| |
|
|
| During, H.J.. |
| Nanocyperion communities (s.l.) are considered here as “warp-and-woof” communities; the Nanocyperion components are described separately as synusiae. On the Netherlands Frisian Islands, four main synusiae have been recognized. Raunkiaer life form spectra show few differences between the communities. Life strategy spectra of the Nanocyperion synusiae, based on systems for phanerogams (modified after Bakker 1966) and bryophytes, yield the clearest patterns. A comparison of the ecology of the communities and an interpretation of the spectra in terms of avoidance of stress or competition suggest that inundations and standing crop of the communities are the main factors determining the distribution of the synusiae. Winter inundations overrule the influence of... |
| Tipo: Article / Letter to the editor |
|
| Ano: 1980 |
URL: http://www.repository.naturalis.nl/record/535155 |
| |
|
|
| Melick, H. van; During, H.J.. |
| Some details are given on the bryophyte vegetation in an old clay pit near Venlo. Due to burrowing activities, the bottom of the pit has a very broken surface, and in the upper soil layer sand, sandy clay and pure clay (from the Tiglien formation) replace each other. On some places water comes out of the soil. Some locally important bryophyte unions (in the sense of Barkman 1973) are described. An impoverished form of the Haplomitrium- Fossombronia incurva union occurs on moist sandy ground. On a steep, south-exposed, dry clay edge a fragment of the Aloinetum rigidae was found. The wet clayey parts are occupied by a vegetation mainly consisting of Leiocolea badensis and Anisothecium varium, for which a new union is proposed, the Leiocolea badensis-... |
| Tipo: Article / Letter to the editor |
|
| Ano: 1976 |
URL: http://www.repository.naturalis.nl/record/534734 |
| |
|
|
|
