Does adaptive strategy for delayed seed dispersion affect extinction probability of a desert species? an assessment using the population viability analysis and glass house experiment



Título del documento: Does adaptive strategy for delayed seed dispersion affect extinction probability of a desert species? an assessment using the population viability analysis and glass house experiment
Revista: Brazilian archives of biology and technology
Base de datos: PERIÓDICA
Número de sistema: 000388249
ISSN: 1516-8913
Autors: 1
Institucions: 1Jai Narain Vyas University, Plant Ecology Laboratory, Jodhpur, Rajasthan. India
Any:
Període: Sep-Oct
Volum: 57
Número: 5
Paginació: 774-781
País: Brasil
Idioma: Inglés
Tipo de documento: Nota breve o noticia
Enfoque: Experimental
Resumen en inglés Canopy seed bank is an important adaptive evolutionary trait that provides various types of protection to the seeds. However, costing of such evolutionary trait on plant survival is largely unknown. Present investigation provided a new insight on the serotonious habit of Blepharis sindica associated with its endangerment status. Extinction probabilities of two available population of B. sindica were quantified using two types of census data, i.e., fruiting body number and actual population size. Population Viability Analysis (PVA) revealed that delayed seed release tendency (higher fruiting body number) was not synchronized with actual ground conditions (lower population size). PVA analysis based on actual population size indicated that both the available populations would vanish within 20 years. The mean time of extinction calculated from both type census data indicated its extinction within 48 years. For assessing the conservation criteria, a glass house experiment was carried out with different soil types and compositions. Pure sand and higher proportions of sand -silt were more suitable compared to clay; further, gravelly surface was the most unsuitable habitat for this species. Collection of the seeds from mature fruits/capsule and their sowing with moderate moisture availability with sandy soil could be recommended
Disciplines Biología
Paraules clau: Angiospermas,
Ecología,
Dispersión de semillas,
Estrategias adaptativas,
Serotinia,
Analisis de viabilidad poblacional,
Desiertos
Keyword: Biology,
Angiosperms,
Ecology,
Seed dispersal,
Adaptive strategies,
Serotiny,
Population viability analysis,
Deserts
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