Drought Sensitivity of the Amazon Rainforest
Records from multiple long-term monitoring plots across Amazonia are used to assess forest responses to the intense 2005 drought, a possible analog of future events that may accelerate climate change through carbon losses and changed surface energy balances.
Long-term decline of the Amazon carbon sink
Atmospheric carbon dioxide records indicate that the land surface has acted as a strong global carbon sink over recent decades, with a substantial fraction of this sink probably located in the…
Basin-wide variations in Amazon forest structure and function are mediated by both soils and climate
Abstract. Forest structure and dynamics vary across the Amazon Basin in an east-west gradient coincident with variations in soil fertility and geology. This has resulted in the hypothesis that soil…
Soils of Amazonia with particular reference to the RAINFOR sites
- C. Quesada, J. Lloyd, L. Anderson, N. Fyllas, M. Schwarz, C. Czimczik
- Environmental Science
- 8 April 2009
Abstract. The tropical forests of the Amazon Basin occur on a wide variety of different soil types reflecting a rich diversity of geologic origins and geomorphic processes. We here review the…
Basin-wide variations in foliar properties of Amazonian forest: phylogeny, soils and climate.
It is found that soil fertility to be the most important predictor, influencing all leaf nutrient concentrations and δ13C and reducing MA, and species that tend to occupy higher fertility soils are characterised by a lower MA and have a higher intrinsic [N], [P], [K], [Mg] and ε13C than their lower fertility counterparts.
Drought-mortality relationships for tropical forests.
It is indicated that repeated droughts would shift the functional composition of tropical forests toward smaller, denser-wooded trees, suggesting the existence of moisture stress thresholds beyond which some tropical forests would suffer catastrophic tree mortality.
Tree height integrated into pantropical forest biomass estimates
Abstract. Aboveground tropical tree biomass and carbon storage estimates commonly ignore tree height (H). We estimate the effect of incorporating H on tropics-wide forest biomass estimates in 327…
Changing paradigms in insect social evolution: insights from halictine and allodapine bees.
It has become apparent that forms of social organization, caste determination, and sex allocation are more labile and complex than previously thought, although the terminologies for describing them are still inadequate.
Inclusive fitness theory and eusociality
It is argued that inclusive fitness theory has been of little value in explained the natural world, and that it has led to negligible progress in explaining the evolution of eusociality, but these arguments are based upon a misunderstanding of evolutionary theory and a misrepresentation of the empirical literature.
Molecular phylogeny and historical biogeography of the large carpenter bees, genus Xylocopa (Hymenoptera: Apidae)
Historical biogeographical analyses of the genus Xylocopa Latreille are presented, showing that the major splits in the carpenter bee phylogeny occurred well after the final breakup of Gondwanaland, but before important Miocene fusion events.