Understanding which species can recover from drought, under what conditions and the mechanistic processes involved, will help researchers predict plant mortality in response to global climate change.
In response to drought, some species die because of embolism-induced hydraulic failure, while others recover, following rehydration. Several tree species have even evolved strategies to avoid embolism, while others tolerate high embolism rates and recover their hydraulic functioning upon drought relief.
This research focuses on structures and processes that might allow some plants to recover from drought stress via embolism reversal.
Water lost from the land surface directly into the atmosphere is a key part of the global water cycle. This transfer can come in the form of evaporation and transpiration, the loss of water through the stomates in the leaves of plants.
To grow, plants open their stomates to capture carbon dioxide, whilst simultaneously losing water through the process of transpiration.
Previous work has shown that observations of this carbon for water exchange at the leaf scale, are inconsistent with measurements at the ecosystem scale (> kilometres). This paper explores six possible mechanisms for these discrepancies and adds to the growing body of research focused on plant water-use efficiency – the key metric that links the carbon and water cycles in land models.
This paper, A census of atmospheric variability from seconds to decades, synthesises and summarises atmospheric variability on time scales from seconds to decades through a phenomenological census. It focuses mainly on unforced variability in the troposphere, stratosphere, and mesosphere.
Transpiration – the evaporation of water from plants – is one of the dominant forces in the Earth’s water cycle. To get a sense of how it will change in response to rising CO2 concentrations, we need to better understand the role played by plant stomata in regulating this flux.