0027296 - BÚ 2006 RIV US eng J - Článek v odborném periodiku
Münzbergová, Zuzana - Mildén, M. - Ehrlén, J. - Herben, Tomáš
Population viability and reintroduction strategies: a spatially explicit landscape-level approach.
[Vitalita populací a strategie reintrodukcí.]
Ecological Applications. Roč. 15, č. 4 (2005), s. 1377-1386. ISSN 1051-0761. E-ISSN 1939-5582
Grant CEP: GA ČR(CZ) GD206/03/H137; GA ČR(CZ) GA206/02/0590
Výzkumný záměr: CEZ:AV0Z60050516
Klíčová slova: extinction threshold * habitat fragmentation * metapopulation capacity
Kód oboru RIV: EF - Botanika
Impakt faktor: 3.804, rok: 2005

Approaches to estimate the effect of habitat destruction on prospect of species survival are often based on the assumption that the current distribution of a species among habitat fragments is in equilibrium between colonization and extinctions. This may be feasible in short-lived highly dispersible organisms, but is surely far from reality in sessile long-lived species, such as most plants. Here we use an alternative approach, a realistic dynamic landscape-level model that does not rely on this assumption. It enables estimation of the effect of habitat destruction using field data on the biology of a species and real landscape structure. Because the approach relies on direct comparisons of changes in population size and survival probability due to habitat changes, it can be easily extended to other conservation questions, such as assessing the effects of local population destruction or identifying optimal reintroduction strategies. We apply this method to a perennial herb Succisa pratensis that is a typical representative of fragmented low-productive grasslands. We used detailed data on local dynamics of the species and landscape structure a modeled species dynamics in the landscape under different scenarios. The results show that habitat destruction alone has little effect on regional survival. However, the effect of habitat destruction increases when combined with population destruction that is expected to play a significant role in the study system. Using the same approach we were also able to design optimal reintroduction strategy for the species, assuming the species was extinct from the landscape. Here we demonstrate the effect of number of propagules available on the selection of the optimal reintroduction strategy. Given the biology of our species, we argue that only a dynamical model makes it fully possible to evaluate the prospect of its survival in fragmented landscapes and design appropriate reintroduction strategies.

Vitalita populací a strategie reintrodukcí
Trvalý link: http://hdl.handle.net/11104/0117410