The dynamics of three shrub species in a fire - prone temperate savanna the interplay between the seed bank, seed rain and fire regime

A model was developed to assess how the seed rain and fire regime affect seed bank dynamics and seedling establishment of three native shrub species [Acanthostyles buniifolius, Baccharis pingraea and Baccharis dracunculifolia] with different regeneration strategies, in temperate South American savan...

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Detalles Bibliográficos
Otros Autores: Galíndez, Guadalupe, Ortega Baes, Pablo, Scopel, Ana Leonor, Hutchings, Michael J.
Formato: Artículo
Lenguaje:Inglés
Materias:
ASTERACEAE
OBLIGATE SEEDERS
PERSISTENT SEED BANK
SPROUTERS
TRANSIENT SEED BANK
GERMINATION
GRAZING
NATIVE SPECIES
OBLIGATE BEHAVIOR
POPULATION REGULATION
REGENERATION
SAVANNA
SEED BANK
SEED PRODUCTION
SEED RAIN
SEEDLING EMERGENCE
SHRUB
SURVIVORSHIP
TEMPERATE ENVIRONMENT
VEGETATION DYNAMICS
WILDFIRE
SOUTH AMERICA
BACCHARIS
BACCHARIS DRACUNCULIFOLIA
BACCHARIS PINGRAEA
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2013galindez.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
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245 1 0 |a The dynamics of three shrub species in a fire - prone temperate savanna   |b the interplay between the seed bank, seed rain and fire regime 
520 |a A model was developed to assess how the seed rain and fire regime affect seed bank dynamics and seedling establishment of three native shrub species [Acanthostyles buniifolius, Baccharis pingraea and Baccharis dracunculifolia] with different regeneration strategies, in temperate South American savanna. Seed bank and seed rain were quantified for each species under different fire regimes, and their relative roles in regeneration were evaluated. All species had short-term persistent seed banks and high annual variability in seed production. A high proportion of seeds deposited in the seed rain produced seedlings after fire; few entered the soil seed bank. Fire killed a high proportion of the seeds in the soil seed bank. Seedlings derived from the seed rain had a higher probability of surviving for 2 years than seedlings emerging from the soil seed bank. In the absence of fire, establishment depended on germination both from the seed rain and the soil seed bank, whereas with annual fire, establishment was primarily dependent on germination of seeds arriving in the annual seed rain, regardless of species' regeneration strategies. These results help to explain changes in the vegetation of South American temperate savannas as a result of changes in fire regime and grazing management during the last 50 years. By revealing the crucial roles of the soil seed bank and seed rain in regeneration, this study provides vital information for the development of appropriate management practices to control populations of shrub species with different regeneration strategies in South American temperate savannas.  
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653 0 |a OBLIGATE SEEDERS 
653 0 |a PERSISTENT SEED BANK 
653 0 |a SPROUTERS 
653 0 |a TRANSIENT SEED BANK 
653 0 |a GERMINATION 
653 0 |a GRAZING 
653 0 |a NATIVE SPECIES 
653 0 |a OBLIGATE BEHAVIOR 
653 0 |a POPULATION REGULATION 
653 0 |a REGENERATION 
653 0 |a SAVANNA 
653 0 |a SEED BANK 
653 0 |a SEED PRODUCTION 
653 0 |a SEED RAIN 
653 0 |a SEEDLING EMERGENCE 
653 0 |a SHRUB 
653 0 |a SURVIVORSHIP 
653 0 |a TEMPERATE ENVIRONMENT 
653 0 |a VEGETATION DYNAMICS 
653 0 |a WILDFIRE 
653 0 |a SOUTH AMERICA 
653 0 |a BACCHARIS 
653 0 |a BACCHARIS DRACUNCULIFOLIA 
653 0 |a BACCHARIS PINGRAEA 
700 1 |9 28573  |a Galíndez, Guadalupe 
700 1 |9 58205  |a Ortega Baes, Pablo  
700 1 |a Scopel, Ana Leonor  |9 711 
700 1 |a Hutchings, Michael J.  |9 72668 
773 |t Plant Ecology  |g vol.214, no.1 (2013), p.75-86 
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900 |a ^tThe dynamics of three shrub species in a fire-prone temperate savanna^sThe interplay between the seed bank, seed rain and fire regime 
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900 |a ^aOrtega-Baes^bP. 
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900 |a ^aGalíndez, G.^tBanco Base de Germoplasma, IRB-INTA, De los Reseros y N^tRepetto, 1686 Hurlingham, Argentina 
900 |a ^aOrtega-Baes, P.^tLaboratorio de Investigaciones Botánicas (LABIBO), Facultad de Ciencias Naturales, Universidad Nacional de Salta-CONICET, Av. Bolivia 5150, 4400 Salta, Argentina 
900 |a ^aScopel, A.L.^tLaboratorio Estación de Biología Sierras, FAUBA-CONICET, Hipólito Yrigoyen 354, 5174 Córdoba, Argentina 
900 |a ^aHutchings, M.J.^tSchool of Life Sciences, University of Sussex, Falmer, Brighton, Sussex, BN1 9QG, United Kingdom 
900 |a ^tPlant Ecology^cPlant Ecol. 
900 |a en 
900 |a 75 
900 |a ^i 
900 |a Vol. 214, no. 1 
900 |a 86 
900 |a ASTERACEAE 
900 |a OBLIGATE SEEDERS 
900 |a PERSISTENT SEED BANK 
900 |a SPROUTERS 
900 |a TRANSIENT SEED BANK 
900 |a GERMINATION 
900 |a GRAZING 
900 |a NATIVE SPECIES 
900 |a OBLIGATE BEHAVIOR 
900 |a POPULATION REGULATION 
900 |a REGENERATION 
900 |a SAVANNA 
900 |a SEED BANK 
900 |a SEED PRODUCTION 
900 |a SEED RAIN 
900 |a SEEDLING EMERGENCE 
900 |a SHRUB 
900 |a SURVIVORSHIP 
900 |a TEMPERATE ENVIRONMENT 
900 |a VEGETATION DYNAMICS 
900 |a WILDFIRE 
900 |a SOUTH AMERICA 
900 |a BACCHARIS 
900 |a BACCHARIS DRACUNCULIFOLIA 
900 |a BACCHARIS PINGRAEA 
900 |a A model was developed to assess how the seed rain and fire regime affect seed bank dynamics and seedling establishment of three native shrub species [Acanthostyles buniifolius, Baccharis pingraea and Baccharis dracunculifolia] with different regeneration strategies, in temperate South American savanna. Seed bank and seed rain were quantified for each species under different fire regimes, and their relative roles in regeneration were evaluated. All species had short-term persistent seed banks and high annual variability in seed production. A high proportion of seeds deposited in the seed rain produced seedlings after fire; few entered the soil seed bank. Fire killed a high proportion of the seeds in the soil seed bank. Seedlings derived from the seed rain had a higher probability of surviving for 2 years than seedlings emerging from the soil seed bank. In the absence of fire, establishment depended on germination both from the seed rain and the soil seed bank, whereas with annual fire, establishment was primarily dependent on germination of seeds arriving in the annual seed rain, regardless of species' regeneration strategies. These results help to explain changes in the vegetation of South American temperate savannas as a result of changes in fire regime and grazing management during the last 50 years. By revealing the crucial roles of the soil seed bank and seed rain in regeneration, this study provides vital information for the development of appropriate management practices to control populations of shrub species with different regeneration strategies in South American temperate savannas.  
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