Drought responses of flood-tolerant trees in Amazonian floodplains

Parolin, Pia; Lucas, Christine; Piedade, Maria Teresa Fernandez; Wittmann, Florian

doi:10.1093/aob/mcp258

Cited by 163 publications

(94 citation statements)

References 70 publications

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“…2). For example, trees of the Amazon and other tropical floodplains endure several months of partial to complete submergence followed by months of moderate to severe water deficit (Parolin et al, 2010). Annual and perennial species native to riparian flood zones are adapted to flooding events of varying amplitude and duration.…”

Section: Floods and Flooding Survival Mechanismsmentioning

confidence: 99%

Waterproofing Crops: Effective Flooding Survival Strategies

2012

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Section: Floods and Flooding Survival Mechanismsmentioning

confidence: 99%

Waterproofing Crops: Effective Flooding Survival Strategies

2012

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“…The falling of leaves during the period of reduced rainfall is considered a defense mechanism in order to reduce water loss due to evapotranspiration (Parolin et al, 2010;Ourique et al, 2016).…”

Section: Litter Production and Meteorological Variablesmentioning

confidence: 99%

Litter production in a natural stand of Brazil nut trees (Bertholletia excelsa Bonpl.)

Guerreiro¹,

JÃonior²,

Ruivo³

et al. 2018

Afr. J. Agric. Res.

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This research estimated litter production and analyzed its relation to environmental variables such as maximum temperature, insolation, and rainfall. The study was conducted on a 300 × 300 m experiment as part of the project titled mapping of native Brazil nut stands and socio-environmental and economic characterization of Brazil nut production systems (MapCast), in the Tapajós National Forest (FLONA Tapajós). Every 30 days for one full year (August 2015 to July 2016), litterfall was collected and stored in a laboratory. After drying, the material was separated into leaves, wood, flowers and fruits, and miscellaneous and weighed. Statistical tests conducted were Shapiro-Wilk (5%), Principal coordinate analysis, t-test, Pearson's linear correlation, cross-correlation, and canonical redundancy analysis. Rainfall and temperature data were inferior and superior, respectively, to normal climate conditions in the region, and data for solar insolation had an abnormal pattern compared to normal climate conditions. Leaf production varied between 169.9 and 965.6 kg ha . The greatest leaf production was measured during the months with the lowest amount of rainfall and highest temperatures, and variation in leaf production and total litterfall was partially explained by temperature and insolation.

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“…The rapid drying of the soil will affect seed germination, seedling recruitment and photosynthetic activity, and thus decrease productivity and alter species composition (Parolin et al, 2010). Moreover, prolonged drought might also increase the risk of forest fires, thus causing losses of species at local and regional scales (Fearnside, 2008a;Malhi et al, 2009).…”

Section: The Reduced In Rainfall Scenariomentioning

confidence: 99%

Possible impacts of climate change on wetlands and its biota in the Brazilian Amazon

Barros

Albernaz

2014

Braz. J. Biol.

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Wetlands cover approximately 6% of the Earth´s surface. They are frequently found at the interface between terrestrial and aquatic ecosystems and are strongly dependent on the water cycle. For this reason, wetlands are extremely vulnerable to the effects of climate change. Mangroves and floodplain ecosystems are some of the most important environments for the Amazonian population, as a source of proteins and income, and are thus the types of wetlands chosen for this review. Some of the main consequences that can be predicted from climate change for wetlands are modifications in hydrological regimes, which can cause intense droughts or inundations. A possible reduction in rainfall can cause a decrease of the areas of mangroves and floodplains, with a consequent decline in their species numbers. Conversely, an increase in rainfall would probably cause the substitution of plant species, which would not be able to survive under new conditions for a long period. An elevation in water temperature on the floodplains would cause an increase in frequency and duration of hypoxic or anoxic episodes, which might further lead to a reduction in growth rates or the reproductive success of many species. In mangroves, an increase in water temperature would influence the sea level, causing losses of these environments through coastal erosion processes. Therefore, climate change will likely cause the loss of, or reduction in, Amazonian wetlands and will challenge the adaptability of species, composition and distribution, which will probably have consequences for the human population that depend on them.Keywords: global warming, wetlands, mangrove, floodplains, Amazonia. Possíveis impactos das mudanças climáticas em áreas úmidase sua biota na Amazônia brasileira ResumoAs áreas úmidas cobrem aproximadamente 6% da superfície da terra e são frequentemente encontradas na interface entre ecossistemas terrestres e aquáticos e fortemente dependentes do ciclo da água. Por esta razão são extremamente vulneráveis aos efeitos das alterações do clima. Os ecossistemas de manguezais e várzeas são muito importantes para os seres humanos da Amazônia, porque são de onde eles extraem algumas das principais fontes de proteínas e renda, e, por isso, foram os dois tipos de áreas úmidas escolhidos para esse estudo. Entre as principais consequências das mudanças climáticas previstas para esses ambientes estão as alterações nos regimes hidrológicos, que podem causar grandes secas ou inundações. A possível redução das chuvas pode causar a diminuição das áreas de mangue e várzea, provocando um rápido declínio de suas espécies. Por outro lado, o aumento das chuvas teria como provável consequência a substituição de espécies de plantas, que não seriam capazes de sobreviver sob as novas condições por um longo período de tempo. As principais consequências do aumento da temperatura da água entre as áreas úmidas seria que nas várzeas este parâmetro aumentaria a frequência ou duração dos episódios hipóxicos e/ou anóxicos, podendo causar a redução da taxa de...

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Drought responses of flood-tolerant trees in Amazonian floodplains

Cited by 163 publications

References 70 publications

Waterproofing Crops: Effective Flooding Survival Strategies

Waterproofing Crops: Effective Flooding Survival Strategies

Litter production in a natural stand of Brazil nut trees (Bertholletia excelsa Bonpl.)

Possible impacts of climate change on wetlands and its biota in the Brazilian Amazon

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