منابع مشابه
Fire drives functional thresholds on the savanna-forest transition.
In tropical landscapes, vegetation patches with contrasting tree densities are distributed as mosaics. However, the locations of patches and densities of trees within them cannot be predicted by climate models alone. It has been proposed that plant-fire feedbacks drive functional thresholds at a landscape scale, thereby maintaining open (savanna) and closed (forest) communities as two distinct ...
متن کاملComparative fire ecology of tropical savanna and forest trees
1. Fire is important in the dynamics of savanna–forest boundaries, often maintaining a balance between forest advance and retreat. 2. We performed a comparative ecological study to understand how savanna and forest species differ in traits related to fire tolerance. We compared bark thickness, root and stem carbohydrates, and height of reproductive individuals within 10 congeneric pairs, each c...
متن کاملPost-fire reproduction of herbs at a savanna-gallery forest boundary in Distrito Federal, Brazil.
In Cerrado, studies of post-fire vegetation recovery show that some herbaceous species are able to flower shortly after fires. However, these were mainly short-term studies that focused on grasslands and savannas. Little is known about the effects of fire on ground layer of forests that border the savannas in Central Brazil. Thus, an accidental burning gave us the opportunity to describe the re...
متن کاملFire regime shift linked to increased forest density in a piñon-juniper savanna landscape
Piñon–juniper (PJ) fire regimes are generally characterised as infrequent high-severity. However, PJ ecosystems vary across a large geographic and bio-climatic range and little is known about one of the principal PJ functional types, PJ savannas. It is logical that (1) grass in PJ savannas could support frequent, low-severity fire and (2) exclusion of frequent fire could explain increased tree ...
متن کاملDifferences in growth patterns between co-occurring forest and savanna trees affect the forest–savanna boundary
1. Patterns of growth, activity and renewal of stems and branches are primary determinants of ecosystem function and strongly influence net primary productivity, water and energy balance. Here we compare patterns of leaf phenology, stem radial growth and branch growth of co-occurring savanna and forest trees in the Cerrado region of central Brazil to gain insight into the influence of these par...
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ژورنال
عنوان ژورنال: Science
سال: 2021
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.371.6527.359-c