Species persistence decreases with habitat fragmentation: an analysis in periodic stochastic environments

Autor: Lionel Roques, Radu S. Stoica
Přispěvatelé: Biostatistique et Processus Spatiaux (BioSP), Institut National de la Recherche Agronomique (INRA)
Jazyk: angličtina
Rok vydání: 2007
Předmět:
Stochastic modelling
Population Dynamics
STOCHASTIC MODEL
SPECIES CONSERVATION
Extinction
Biological
01 natural sciences
Models
Biological
03 medical and health sciences
GIBBS MEASURES
Reaction–diffusion system
Statistics
Quantitative Biology::Populations and Evolution
Computer Simulation
[INFO]Computer Science [cs]
Statistical physics
0101 mathematics
[MATH]Mathematics [math]
Ecosystem
030304 developmental biology
Mathematics
0303 health sciences
Stochastic Processes
Habitat fragmentation
LANDSCAPE
Stochastic process
Applied Mathematics
010102 general mathematics
Fragmentation (computing)
15. Life on land
Agricultural and Biological Sciences (miscellaneous)
MODELISATION
Habitat
Population model
Nonlinear Dynamics
Modeling and Simulation
CONSERVATION DES ESPECES
Persistence (discontinuity)
Algorithms
Zdroj: Journal of Mathematical Biology
Journal of Mathematical Biology, Springer Verlag (Germany), 2007, 55 (2), pp.189-205. ⟨10.1007/s00285-007-0076-8⟩
ISSN: 0303-6812
1432-1416
DOI: 10.1007/s00285-007-0076-8⟩
Popis: International audience; This paper presents a study of a nonlinear reaction–diffusion population model in fragmented environments. The model is set on RN, with periodic heterogeneous coefficients obtained using stochastic processes. Using a criterion of species persistence based on the notion of principal eigenvalue of an elliptic operator, we provided a precise numerical analysis of the interactions between habitat fragmentation and species persistence. The obtained results clearly indicated that species persistence strongly tends to decrease with habitat fragmentation. Moreover, comparing two stochastic models of landscape pattern generation, we observed that in addition to local fragmentation, amore global effect of the position of the habitat patches also influenced species persistence.
Databáze: OpenAIRE
Externí odkaz: