Savanna vegetation-fire-climate relationships differ among continents

CER Lehmann, TM Anderson, M Sankaran, SI Higgins… - Science, 2014 - science.org
Ecologists have long sought to understand the factors controlling the structure of savanna
vegetation. Using data from 2154 sites in savannas across Africa, Australia, and South …

What Limits Trees in C4 Grasslands and Savannas?

WJ Bond - Annual review of ecology, evolution, and systematics, 2008 - annualreviews.org
Though the distribution of global vegetation can generally be predicted from climate,
grasslands are an exception. C4 grassy biomes cover vast areas that are warm enough and …

The global extent and determinants of savanna and forest as alternative biome states

AC Staver, S Archibald, SA Levin - science, 2011 - science.org
Theoretically, fire–tree cover feedbacks can maintain savanna and forest as alternative
stable states. However, the global extent of fire-driven discontinuities in tree cover is …

Global resilience of tropical forest and savanna to critical transitions

M Hirota, M Holmgren, EH Van Nes, M Scheffer - Science, 2011 - science.org
It has been suggested that tropical forest and savanna could represent alternative stable
states, implying critical transitions at tipping points in response to altered climate or other …

Woody encroachment decreases diversity across North American grasslands and savannas

Z Ratajczak, JB Nippert, SL Collins - Ecology, 2012 - Wiley Online Library
Woody encroachment is a widespread and acute phenomenon affecting grasslands and
savannas worldwide. We performed a meta‐analysis of 29 studies from 13 different …

A biogeographic model of fire regimes in Australia: current and future implications

RA Bradstock - Global Ecology and Biogeography, 2010 - Wiley Online Library
Aim Patterns of fire regimes across Australia exhibit biogeographic variation in response to
four processes. Variations in area burned and fire frequency result from differences in the …

Tree cover in sub‐Saharan Africa: rainfall and fire constrain forest and savanna as alternative stable states

AC Staver, S Archibald, S Levin - Ecology, 2011 - Wiley Online Library
Savannas are known as ecosystems with tree cover below climate‐defined equilibrium
values. However, a predictive framework for understanding constraints on tree cover is …

Woody cover in African savannas: the role of resources, fire and herbivory

M Sankaran, J Ratnam, N Hanan - Global ecology and …, 2008 - Wiley Online Library
Aim To determine the functional relationships between, and the relative importance of,
different driver variables (mean annual precipitation, soil properties, fire and herbivory) in …

Effects of fire protection on savanna structure in Central Brazil

AG Moreira - Journal of biogeography, 2000 - Wiley Online Library
Aim Fire protection gradually changes the density of woody plants in numerous savannas
around the world. In this study changes of structure in two tropical savanna areas with …

Conundrums in mixed woody–herbaceous plant systems

JI House, S Archer, DD Breshears… - Journal of …, 2003 - Wiley Online Library
Aims To identify approaches to improve our understanding of, and predictive capability for,
mixed tree–grass systems. Elucidation of the interactions, dynamics and determinants, and …