| Titre : | Biological Conservation 135(3) - MAR 2007 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Asko Lohmus, Auteur ;
Piret Lohmus, Auteur ;
Kai Vellak, Auteur
Though the habitats and substrata of bryophytes and lichens overlap, their diversity has not been comparatively explored at large scales. We studied lichens and bryophytes on 30 random 2-km transects in a forest landscape in Estonia. For each ve[...]
Article
Bjorn Norden, Auteur ;
Heidi Paltto, Auteur ;
Frank Gotmark, Auteur ;
Kjell Wallin, Auteur
In the Nordic countries, sets of Indicator (Signal) species, predominantly cryptogams, have been used as one measure to find forest stands which may harbour Red List species. Such data could potentially also be used to prioritise among stands fo[...]
Article
Kai Vellak, Auteur ;
Ain Vellak, Auteur ;
Nele Ingerpuu, Auteur
The causes of moss rarity were analysed in three neighbouring countries. Estonia, Latvia and Lithuania, situated along the coast of the Baltic Sea, cover together 175,000 km(2). They belong to the same vegetation zone, and have similar economic [...]
Article
Henrik Hedenas, Auteur ;
Per Hedstrom, Auteur
In the boreal forest landscape, aspen has been effectively selected against in favour of conifers. The decrease in aspen is of particular concern since it has more host-specific species associated with it than any other boreal tree species. Rece[...]
Article
Lars Soderstrom, Auteur ;
Ana Seneca, Auteur ;
Mariana Santos, Auteur
Rarity along two of the three parameters of rarity of Rabinowitz (habitat specificity and distribution range) is investigated for the members of the Lophoziaceae/Scapaniaceae complex occurring north of the Tropic of Cancer (174 species). Using a[...]
Article
Modelling bryophyte distribution based on ecological information for extent of occurrence assessment
Cecilia Sergio, Auteur ;
Rui Figueira, Auteur ;
David Draper, Auteur ;
Rui Menezes, Auteur ;
Antonio Jorge Sousa, Auteur
For some groups such as bryophytes, the IUCN distribution criteria are of critical importance to evaluate threat status, since other parameters cannot be determined readily In this study, we propose the use of ecological niche modelling methods [...]
Article
The cryptogams constitute a very species-rich group. However, only a few taxa are well-studied and we thus know very little about the majority of the species. Moreover, cryptogams are usually small and hard to identify without training. The lack[...]
Article
Lars Olof Bjorn, Auteur
The stratospheric ozone layer, which protects the biosphere from biologically active (mostly harmful) ultraviolet-B (UV-B) solar radiation, thinned during the latter half of the 20th century. In this paper some of the effects of UV-B radiation o[...]
Article
Emma J. Pharo, Auteur ;
Charles E. Zartman, Auteur
Testing the myriad predictions associated with the community, demographic and genetic impacts of habitat fragmentation remains a high conservation priority. Many bryophyte taxa are ideal model systems for experimentally testing such metapopulati[...]
Article
Kristoffer Hylander, Auteur ;
Bengt Gunnar Jonsson, Auteur
Article
Urban Gunnarsson, Auteur ;
Lars Soderstrom, Auteur
Species can become regionally rare when limited by the availability of suitable habitats or by limited dispersal ability. We tested if the presence of a rare bryophyte species (Sphagnum angermanicum) was dispersal or habitat limited and at the s[...]
Article
Kalle Malson, Auteur ;
Hakan Rydin, Auteur
Biodiversity in wetland habitats is strongly affected by drainage. In Sweden, rich fens (alkaline fens) have been particularly affected by drainage campaigns for forestry and conversion to agricultural land. Fragmentation of the landscape, invas[...]
Article
Tana Stechova, Auteur ;
Jan Kucera, Auteur
Hamatocaulis vernicosus, a rare moss, has been investigated in detail for its habitat preferences, ecology and population dynamics in the Czech Republic. At all its known sites plant species composition was described and relationships with envir[...]
Article
Mats Dynesius, Auteur ;
Kristoffer Hylander, Auteur
We asked if short-term changes in bryophyte communities in response to clear-cutting of boreal stream-side forests are persistent and whether species with low resilience may survive in narrow riparian buffer strips. To assess short-term changes [...]
Article
Risto Virtanen, Auteur ;
Jari Oksanen, Auteur
We investigated the effects of habitat patch size and connectivity on cryptogam richness on 288 calcareous boulders. The studied boulders were found to be a particularly suitable 'metacommunity model system' and allowed comparison of species ric[...]
Article
Christopher J. Ellis, Auteur ;
Brian J. Coppins, Auteur ;
Terence P. Dawson, Auteur
Studies in the response of vegetation to predicted future climate change have focussed on vascular plants and are therefore largely unrepresentative of wider botanical diversity (i.e. comprising cryptogams; algae, mosses, liverworts and fungi in[...]
Article
Henrik Hedenas, Auteur ;
Patrik Blomberg, Auteur ;
Lars Ericson, Auteur
In the boreal forest landscape, aspen has been effectively selected against in favour of conifers. The decrease in aspen is of particular concern, since it has more host-specific species associated with it than any other boreal tree species. Rec[...]
