共查询到20条相似文献，搜索用时 15 毫秒
1.
2.
3.
Krunica Hruška 《Folia Geobotanica》1985,20(3):225-243
A survey of the nitrophilous fringe communities of the region Marche (Central Italy) allows the individualization of five associations well characterized floristically and ecologically. These are:Urtico-Aegopodietum, Anthriscetum sylvestris, Chaerophylletum aurei, Alliario-Chaerophylletum temuli, andAnthriscetum nemorosae. The first three associations are ranged, from the phytosociological point of view, in the allianceAegopodion podagrariae, while the last two belong to the allianceGalio-Alliarion. 相似文献
4.
5.
6.
7.
8.
9.
Résumé analytique Dans la région de Yangambi-Stanleyville, les pentes sableuses ou gréseuses sèches ensoleillées (falaises, talus, déblais) sont colonisées par l'association à Dicranopteris linearis (Gleichenietum linearis ass. nov.) se décomposant en une phase initiale à dominance de bryophytes et d'algues et une phase optimale à dominance de ptéridophytes dans laquelle abonde Dicranopteris linearis accompagné d'espèces pionnières des groupements forestiers de terre ferme.
Reçu par la rédaction le 12.XII.1953. 相似文献
Summary In the region of Yangambi-Stanleyville, the sandy dry and sunny slopes (cliff, digging) are colonized by the Dicranopteris linearis association (Gleichenietum linearis ass. nov.) which falls into two phases: an initial with bryophytes and algae and an optimal one with predominance of pteridophytes, chiefly Dicranopteris linearis accompanied by various pioneer forest species.
Reçu par la rédaction le 12.XII.1953. 相似文献
10.
《Geobios》1988,21(1):49-63
enTwo sections have been analysed: San Onofrequarry and Pliocene deposits from Tarragona E2 hole which is biostratigraphically subdivided according to planktonic foraminifera. A latitudinal floristic differentiation is evidenced for South-Western European Lower Pliocene. The increasing open vegetation in the coastal plain is to be related to high xericity. 相似文献
11.
《Comptes rendus de l'Académie des sciences. Série III, Sciences de la vie》1999,322(8):651-655
We have found a relationship between the net absorption of carbon at time t divided by the net absorption of carbon in 24 h (AN(t)/AN(24)) and the incubation duration after sunrise, in surface waters of the western Mediterranean sea. This ratio is quite similar whatever the sample location, the sample depth and the 24-h net-absorption level. Considering this result, we have established a correction factor which may be used to convert primary production rates obtained from incubation durations ≤ 24 h to daily rates (24 h dawn-to-dawn). 相似文献
12.
13.
14.
15.
16.
17.
18.
19.