A Comparison of Frugivory and Scatter-Hoarding Seed-Dispersal Syndromes

Author: Vander Wall, Stephen B.; Beck, Maurie J. Description: Frugivory (animals ingest all or part of fleshy-fruits and defecate or regurgitate seeds) and scatter-hoarding (animals store seeds in small caches in soil) are two important vertebrate-mediated seed dispersal syndromes. In both instances, there is an exchange of food for seed transport, but there are many important differences. For example, the seeds of frugivore-dispersed plants are often clumped in feces or under roosts and the microsite of depostion is often unsuitable for seedling establishment. However, frugivores can transport seeds long distances…

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Predicting species’ maximum dispersal distances from simple plant traits

Author: Tamme, R; Gotzenberger, L; Zobel, M; Bullock, JM; Hooftman, DA; Kaasik, A; Partel, M Description: Many studies have shown plant species’ dispersal distances to be strongly related to life-history traits, but how well different traits can predict dispersal distances is not yet known. We used cross-validation techniques and a global data set (576 plant species) to measure the predictive power of simple plant traits to estimate species’ maximum dispersal distances. Including dispersal syndrome (wind, animal, ant, ballistic, and no special syndrome), growth form (tree, shrub, herb), seed mass, seed…

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Effect of fire on hard-coated Cistaceae seed banks and its influence on techniques for quantifying seed banks

Author: Ferrandis, Pablo; Herranz, Jose M.; Martinez-Sanchez, Juan J. Description: The impact of fire on hard-coated Cistaceae (Halimium ocymoides, Cistus ladanifer, and C. salvifolius) soil seed banks in a Mediterranean ‘maquis’ shrubland, and its effect on seed germinability were studied. The study also contrasts the effectiveness of two widely used techniques for quantifying seed banks, the seedling emergence and the physical separation methods, in relation to fire. The null hypothesis that a massive enhancement of physically-dormant Cistaceae seed germination by fire would make use of the time-consuming physical separation technique…

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