Resultado da Busca
17 de jan. de 2022 · We propose that the typically understudied shallow WT forests are more resilient to drought than other forests, and generally represent hydrologic refugia from drought (sensu McLaughlin et al., 2017), due to critical differences in underlying soil water regimes (Fig. 1b).
- 35
- 237, Issue3
- 17 January 2022
13 de out. de 2020 · This figure highlights: major drought periods in 2009–2010 and 2015–2016 and major wet periods in 2005, 2011 and 2014; and four episodes (2005, 2006, 2008 and 2009) of droughts preceded by wet extremes, leading to the positive interaction effect on tree demographic rates.
- Erick J. L. Esteban, Carolina V. Castilho, Karina L. Melgaço, Flávia R. C. Costa
- 47
- 2021
- 13 October 2020
Yet, extreme wet episodes, which are becoming as severe and frequent as droughts, are overlooked and their impacts remain poorly understood. Moreover, drought reports are mostly based on forests over a deep water table (DWT), which may be particularly sensitive to dry conditions.
Based on demographic responses of 30 abundant tree species over the past two decades, in this study we analyzed the impacts of severe droughts but also of concurrent extreme wet periods, and how topographic affiliation (to shallow - SWTs - or deep - DWTs - water tables), together with species functional traits, mediated climate effects on trees.
- Erick J. L. Esteban, Carolina V. Castilho, Karina L. Melgaço, Flávia R. C. Costa
- 2021
The other side of droughts: wet extremes and topography as buffers of negative drought effects in an Amazonian forest. Erick J. L. Esteban1* , Carolina V. Castilho2, Karina L. Melgac ̧o3and Fl ́avia R. C. Costa4*.
Our evidence supports the hypothesis of neglected shallow WT forests being resilient to moderate drought, challenging the prevailing view of widespread negative effects of climate change on Amazonian forests that ignores WT gradients, but predicts they could collapse under very strong droughts.
There is a consensus about negative impacts of droughts in Amazonia. Yet, extreme wet episodes, which are becoming as severe and frequent as droughts, are overlooked and their impacts remain poorly understood.
