摘要:

Lake Corlo is a dammed reservoir for hydro-electrical purposes in Northern Italy. Weekly samplings were made from May to August 1985 in the euphotic layer. Two major categories, flagellates and diatoms, alternatively dominated the algal community. Flagellates prevailed with stratified conditions. The strong influence of hydraulic conditions on phytoplakton succession is emphasized.

ISSN:0017-0070    

DOI:10.1080/11263509209430300

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

We propose a study of the main species belonging to the genusQuercusin Italy, characterized and identified by means of leaf surface observation, with special attention devoted to waxes, trichomes and stomata. Comparing our results with the classification proposed by SCHWARZ (1984), we find that species belonging to Schwarz's subgenusQuercusare recognizable because their waxes are structured in vertical scales; the two other subgenera (SclerophyllodrysandCerris) present smooth wax structures, their distinctive feature being the shape of the stomatal rima, which is roundish inSclerophyllodrysand elliptical inCerris. The study characterizesQuercus pubescensWilld. andQuercus petraeaLiebl. by analyzing some morphometric traits; but the authors feel that further research is needed on these critical taxonomic entities. Lastly, the study examines forms of was degeneration correlated to the phenomenon known as oak decline.

ISSN:0017-0070    

DOI:10.1080/11263509209430301

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

Vegetation in shelters frequented by wild ungulata, on Northern Monte Baldo. - On Monte Altissimo di Nago (northern Monte Baldo) a rare vegetation type was found. This vegetation type, occourring under shelters visited by wild Ungulata, has been assigned to theLappulo-AsperuginetumBRAUN-BLANQUET & SUTTER 1983. This association is reported for the first time for Italy. The peculiar interest ofLappulo-Asperuginetumdepends on the rare plant species, that characterize it. Among these species,Arabis novaVill.,Chenopodium foliosumAsch. andAsperugo procumbensL. are to be mentioned.

ISSN:0017-0070    

DOI:10.1080/11263509209430302

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

Morphological and ecological observations on four fleshy crustose algae collected in the eulittoral and upper sublittoral zone of the Island of Gorgona:Myrionema liechtensteniiHauck,Hildenbrandia canariensisBørgesen,Peyssonnelia armorica(P. et H. Crouan) Weber-van Bosse in Børgesen andCruoria cruoriaeformis(P. et H. Crouan) Denizot are reported. For each species, information on some aspects of their ecology, geographical distribution and notes on their vegetative and reproductive morphology are given.

ISSN:0017-0070    

DOI:10.1080/11263509209430303

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

Phytoplankton distribution in a brackish area of North-Eastern Sicily-The abundance and taxonomic composition of the phytoplankton have been studied in relation to temperature, salinity and dissolved oxygen in the brackish pools of Oliveri-Tindari, a very restricted area on the Tyrrhenian coast of Sicily (Italy). The phytoplankton distribution in these pools has been subject to relatively few investigations. Although this area is not influenced by sewage and industrial effluents, some pools showed episodical high densities of phytoplankton, due to the influence of organic inputs (streams and water-bearings), and anoxic conditions.

ISSN:0017-0070    

DOI:10.1080/11263509209430304

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

Benthic marine flora of Tuscan Archipelago has been studied. Several samples were collected along five islands and some rocks. This paper is a compendium of new and already published data, in which 267 species, varieties, forms and stadia of algae and seagrasses are listed: 5 Bangiophyceae, 182 Florideophyceae, 45 Phaeophyceae, 6 Chlorophyceae, 28 Bryopsidophyceae, 1 Angiospermae.

ISSN:0017-0070    

DOI:10.1080/11263509209430305

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue

ISSN:0017-0070    

DOI:10.1080/11263509209430299

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor