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How much seed remains in the soil after a fire?
Soil seed banks that persist after a fire are important in fire-prone habitats as they minimise the risk of decline or local extinction in plants, should the fire-free interval be less than the…
Temperature thresholds of physically dormant seeds and plant functional response to fire: variation among species and relative impact of climate change
- M. Ooi, A. J. Denham, V. M. Santana, T. Auld
- Environmental ScienceEcology and evolution
- 12 February 2014
Evidence from this study supports including dormancy-breaking temperature thresholds as an attribute for identifying functional types in trait frameworks, and predicts that species in the facultative group are most at risk to increased seed bank decay resulting from elevated soil temperatures under projected climate change.
Very Low Fruit : Flower Ratios in Grevillea (Proteaceae) are Independent of Breeding System
The correlation between SI and FR: FL ratios was non-significant, indicating that compatibility has a minimal effect on fruit set in the Grevillea species studied, and that these data, together with other data on proteaceous species do not support trends observed in Sutherland’s survey.
Climate change and bet‐hedging: interactions between increased soil temperatures and seed bank persistence
In order to predict the long‐term consequences of climate change, it is necessary to link future environmental changes to mechanisms that control plant population processes. This information can then…
Projected soil temperature increase and seed dormancy response along an altitudinal gradient: implications for seed bank persistence under climate change
It is suggested that parental climate is the key selective force determining dormancy-breaking threshold temperatures, ensuring inter-fire seed bank persistence and producing conditions that provide a mechanism for seed bank compromise.
The role of ants and mammals in dispersal and post-dispersal seed predation of the shrubs Grevillea (Proteaceae)
Ants may reduce the overall levels of seed predation where seeds moved by Removalist ant species escape predation and are deposited in safe sites, hence allowing more seeds to reach the persistent soil seedbank.
Effects of soil temperature regimes after fire on seed dormancy and germination in six Australian Fabaceae species
- V. M. Santana, R. Bradstock, M. Ooi, A. J. Denham, T. Auld, M. J. Baeza
- Environmental Science
- 17 November 2010
Simulation of temperature regimes after a summer fire showed that simulated temperature regimes break seed dormancy, and the highest germination rates reached after the longest duration and highest temperatures, however, the germination response varied among species.
Survival and recruitment of seedlings and suckers of trees and shrubs of the Australian arid zone following habitat management and the outbreak of Rabbit Calicivirus Disease (RCD)
Survition of suckers of some species was slightly greater than pre-RCD estimates, but in general, a pattern of little or nil recruitment is likely in suckers exposed to rabbits or to all grazing mammals.
Local and regional ecological morphology of dung beetle assemblages across four biogeographic regions
It is considered whether local-scale processes leave a signature in regional patterns of functional diversity in dung beetle assemblages, and the correlation between total exploited ecomorphological space and density of species packing with increased species richness is investigated.