| Titre : | Biological Conservation 129(1) - APR 2006 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
P. Janeckova, Auteur ;
K. Wotavova, Auteur ;
I. Schodelbauerova, Auteur ;
J. Jersakova, Auteur ;
P. Kindlmann, Auteur
For population viability analysis of endangered orchid populations, it is crucial to disentangle the effects of weather and management from intrinsic orchid dynamics. When doing this, typically several months' average temperatures and/or sums of[...]
Article
Y. Pillon, Auteur ;
M. F. Fay, Auteur ;
A. B. Shipunov, Auteur ;
M. W. Chase, Auteur
Setting conservation priorities in taxonomically complex groups such as the orchid genus Dactylorhiza is a difficult task. As an alternative to taxonomic diversity, we used here a molecular phylogenetic analysis and the result, of a genetic inve[...]
Article
D. F. Whigham, Auteur ;
J. P. O'Neill, Auteur ;
H. N. Rasmussen, Auteur ;
B. A. Caldwell, Auteur ;
M. K. McCormick, Auteur
Terrestrial orchids typically produce numerous small seeds that contain very small nutrient reserves. The seeds are structurally adapted for wind dispersal but little is known about their fate after dispersal. Some studies of seed viability in s[...]
Article
T. Kull, Auteur ;
P. Kindlmann, Auteur ;
M. J. Hutchings, Auteur ;
R. B. Primack, Auteur
Article
S. Cozzolino, Auteur ;
A. M. Nardella, Auteur ;
S. Impagliazzo, Auteur ;
A. Widmer, Auteur ;
C. Lexer, Auteur
Natural hybridization between plant species often occurs in disturbed habitats and it is generally considered a threat for rare and endangered species. A different situation occurs in Mediterranean food deceptive orchids, where hybridization is [...]
Article
K. M. Rodriguez-clark, Auteur ;
A. Sanchez-Mercado, Auteur
Populations of threatened taxa in captivity within their natural ranges can make important contributions to conservation, but these may be compromised by the inappropriate application of population management goals developed in other contexts. W[...]
Article
Article
S. M. Wiegmann, Auteur ;
D. M. Waller, Auteur
Resurveys of plant communities provide valuable information on changes in species composition over time and clues about how species respond to environmental change. We report results from resurveys of 62 upland forest stands in northern Wisconsi[...]
Article
G. Zotz, Auteur ;
G. Schmidt, Auteur
The population dynamics of the epiphytic orchid Aspasia principissa, growing in the moist tropical forest of Barro Colorado Island, Panama, were studied from 1997 until 2004. Using growth analysis, projection matrix analysis, elasticity analysis[...]
Article
M. A. Barrett, Auteur ;
P. Stiling, Auteur
Ungulate herbivory can have strong impacts on plant communities, but these impacts are rarely considered in recovery plans of endangered species. This study examined the effects of the endangered Key deer (Odocoileus virginianus clavium) on its [...]
Article
R. L. Tremblay, Auteur ;
E. Melendez-Ackerman, Auteur ;
D. Kapan, Auteur
Previous in situ studies of orchid population dynamics with conservation relevance have focused on one or a few populations in a limited area. Many species of orchids occur as hyperdispersed populations in ephemeral habitats (epiphytic, twig epi[...]
Article
T. Nagamitsu, Auteur ;
T. Kawahara, Auteur ;
A. Kanazashi, Auteur
An endemic dwarf birch, Betula apoiensis, is critically endangered, and two populations of this species are restricted to the ridges of Mt. Apoi in Hokkaido, Japan. We observed the flowering phenology, pollen dispersal, and viable seed productio[...]
Article
K. B. Gregg, Auteur ;
Marc Kéry, Auteur
Recent studies using capture-recapture modelling in terrestrial orchids have shown relationships among survival, life-state, climate and dormancy, but to date, there has been no rigorous study of the effects of size on demographic rates. Here we[...]
Article
F. Coates, Auteur ;
I. D. Lunt, Auteur ;
R. L. Tremblay, Auteur
Natural and anthropogenic disturbances can have dramatic consequences for population growth, particularly for small populations of threatened plants. We analysed census data for the largest population (124 individuals) of the critically endanger[...]
Article
T. Kull, Auteur ;
M. J. Hutchings, Auteur
National databases were interrogated to analyse and compare proportional alterations in the distribution ranges of orchid species between two surveys in the UK (surveys completed in 1969 and 1999) and in Estonia (surveys completed in 1970 and 20[...]
