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Species diversity of bryophytes and ferns of lampenflora in Grotta Gigante (NE Italy)
Full text linkLampenflora consists of phototrophic organisms which grow
near artificial light. In caves with artificial lighting, a vegetation
of aerophytic cyanobacteria and algae, bryophytes and
ferns can be found around lamps; these communities represent
an alteration of the underground environment and may cause
damages both to speleothems and cave fauna. The development
of lampenflora is a typical problem for show cave management.
A floristic research of bryophytes and ferns (land plants) of
lampenflora was carried out in 2012 in Grotta Gigante, a very
well-known show cave of the Trieste Karst (NE Italy), in order
to compile a species inventory. 26 sites near artificial lights of
different kinds were sampled in the dark zone of the show cave.
16 moss species and 2 ferns were found; no liverworts were observed.
The most common species are the mosses Eucladium
verticillatum, Fissidens bryoides, Oxyrrhynchium schleicheri,
Rhynchostegiella tenella and the fern Asplenium trichomanes; 7
moss species were found only in one to two sites. Some moss
species belong to the flora of natural cave entrances of the Italian
Karst, while other are typical of disturbed, open habitats.
Various moss species and A. trichomanes are colonizing areas
around LEDs and fluorescent lamps installed in 2009 along
the cave’s pathways for safety lighting. Species richness of
bryophytes and ferns of lampenflora in Grotta Gigante is the
highest compared to other recently investigated show caves
in the neighbouring Slovenia. Lampenflora of Grotta Gigante
conforms to that found in other Slovenian show caves studied
starting from the ’40. The main ecological factors affecting
lampenflora identified in this work are: light intensity, water
availability, type of substrate, morphological features of surfaces,
presence of clay. Aspects of species ecology and distribution
in the cave are discussed
Studi lichenologici in Italia Nord-orientale. VIII: La diversita' lichenica nell'area periurbana del M. valerio (Trieste, Friuli-Venezia Giulia).
No full textStudi lichenologici in Italia Nord-orientale. VII. Effetti dell'inquinamento atmosferico sulle comunità licheniche epifite nella Provincia di Trieste.
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A comparison between two moss species used as transplants for airborne trace element biomonitoring in NE Italy.
No full textTransplants of the mosses Hypnum cupressiforme
and Pseudoscleropodium purum used as
active biomonitors of airborne trace elements were
compared in a survey carried out at Trieste (NE Italy).
Twelve elements were considered: Al, As, Cd, Cr, Cu,
Fe, Hg, Mn, Pb, Ti, V, Zn. Water-washed materials of
H. cupressiforme and P. purum, collected in a remote
area to prepare transplants, showed comparable
content of all elements, excluding Pb. Transplants of
P. purum showed a significantly higher accumulation
of Al, Fe, Pb and Ti; higher levels of Cu and V were
accumulated in H. cupressiforme. Losses of some
elements occurred in some samples of both species;
the most consistent losses regarded Cr and Mn.
Accumulation data of Al, As, Cd, Hg, Zn found in
the two transplanted sets were not correlated. Differences
in element uptake in the two mosses are likely
to depend mainly on morphology, and probably on
the different forms of emission and deposition types
of the elements. The two mosses showed an overall
accordance in discriminating sites highly and scarcely
affected by trace element depositions, although they
accumulated some elements, in particular Hg and Zn,
in different ways. P. purum proved to be a better
accumulator than H. cupressiforme, showing similar
or higher accumulation and lower loss of almost all
elements, especially those related to particulate, dry
depositions; H. cupressiforme could be effective in
detecting large-scale patterns, related to wet depositions.
These results indicate that these mosses cannot
be used interchangeably for monitoring particular
elements, and are able to provide complementary
information on different, local and long-range deposition
patterns
Monitoring of airborne metal pollution by moss bags: a methodological study.
Full text linkThe use of moss transplants for monitoring heavy metals deposition is briefly reviewed. The methodological study concerns the effects of different types of pre-treatment on data variability. Epiphytic samples of Hypnum cupressiforme were collected from an unpolluted area, treated in different ways, and the resulting bags were exposed in two sites in the province of Trieste (NE ltaly) with widely different pollution: a natural woodland far from urban and industrial centers, and a site near an iron smelting industry in the industrial area of Trieste. The
content of eight heavy metals (Al, Cd, Cr, Cu, Fe, Mn, Ni, Pb) was measured in 80 moss samples by atomic absorption spectrophotometry. The results, which represent a contribution to the standardization of the moss bags technique, concern: a) variability of metal conteni in mosses from natural areas: this is influenced by soil contamination; it is advisable to collect epiphytic samples, avoiding those growing near the base of the trunks; b) effects of different washing treatments on metal contents: compared to distilled water, washing with an acid solution
is particularly efficient in removing metal ions associateci with the cell wall, but produces more variable data; c) uptake capacity of exposed moss bags: this is not influenced by the type of washing, and even short periods of exposure were sufficient to reveal differences in metal depositions between the two sites
Dianthus superbus L. ssp. superbus (Caryophyllaceae). In: Martini F. (ed.), Aggiornamenti alla flora del Friuli Venezia Giulia (Italia Nord-orientale). Nuova Serie. I (1-40).
No full textNell’ambito del nuovo progetto per la cartografia al quadrante della flora vascolare del Friuli Venezia Giulia,
si rendono noti 40 ritrovamenti di particolare interesse riferiti a specie, sottospecie e ibridi nuovi o rari per la flora regionale.
Taxa autoctoni: Aconitum lycoctonum ssp. vulparia, A. lycoctonum nssp. spetaianum, Alchemilla alpinula, A. decumbens, A.
glabra, A. glomerulans, A. hirtipes, A. impexa, A. leptoclada, A. lineata, A. reniformis, A. strigosula, A. tirolensis, A. versipila,
Astragalus depressus ssp. depressus, Cardamine bellidifolia ssp. alpina, Crocus biflorus ssp. biflorus, Dianthus superbus ssp. superbus,
Erigeron glabratus ssp. glabratus, Gagea spathacea, Galium aristatum, Gaudinia fragilis, Festuca pulchella ssp. jurana,
Ludwigia palustris, Pulmonaria vallarsae, Seseli tommasinii, Trisetum flavescens ssp. purpurascens. Taxa alloctoni: Aurinia
sinuata, Brachypodium distachyon, Cephalaria transsylvanica, Cycloloma atriplicifolium, Dracunculus vulgaris, Elodea nuttallii,
Eragrostis barrelieri, Galanthus elwesii, Galium murale, Muhlenbergia schreberi, Ribes uva-crispa ssp. uva-crispa, Solanum
carolinense, Umbilicus horizontalis
Lichens of the Terra Nova Bay area, northern Victoria Land
No full text57 lichen species are reported from the Terra Nova Bay area (Northern Victoria Land, continental Antarctica), on the basis of collections from the Italian Antarctic Expeditions 1987-1996. 51 of them were identified to species level. A key for their identification is provided. Morpho-anatomical descriptions and
nomenclatural, taxonomic and phytogeographical remarks are given for each taxon. Blastenia viridans Js. Murray is reduced to synonymy with Caloplaca athallina Darb
Monitoraggio della qualità dell'aria mediante licheni: esperienze sul bioaccumulo e la bioindicazione in Italia.
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