Extreme Seasonal Climate Variations in the Amazon Basin: Droughts and Floods

2016 ◽  
pp. 55-76 ◽  
Author(s):  
José A. Marengo ◽  
Earle R. Williams ◽  
Lincloln M. Alves ◽  
Wagner R. Soares ◽  
Daniel A. Rodriguez
Keyword(s):  
Amazon Basin ◽  
Climate Variations ◽  
Seasonal Climate ◽  
Droughts And Floods

scholarly journals Seasonal Climate Variations Promote Bacterial α-Diversity in Soil

2021 ◽  
Author(s):  
Xin-Feng Zhao ◽  
Wen-Sheng Shu ◽  
Yi-Qi Hao
Keyword(s):  
Climate Variations ◽  
Seasonal Climate ◽  
Α Diversity

scholarly journals Seasonal climate variations promote bacterial α-diversity in soil

2020 ◽  
Author(s):  
Xin-Feng Zhao ◽  
Wen-Sheng Shu ◽  
Yi-Qi Hao
Keyword(s):  
Bacterial Community ◽  
Seasonal Variations ◽  
Structural Equation ◽  
Structural Equation Models ◽  
Soil Bacterial Community ◽  
Climate Variations ◽  
Seasonal Climate ◽  
Diversity Maintenance ◽  
Α Diversity ◽  
Soil Bacterial

Ecological theory suggests that temporal environmental fluctuations can contribute greatly to diversity maintenance. Given bacteria's short generation time and rapid responses to environmental change, seasonal climate fluctuations are very likely to play an important role in maintaining the extremely high α-diversity of soil bacterial community, which has been unfortunately neglected in previous studies. Here, with in-depth analyses of two previously published soil bacterial datasets at global scale, we found that soil bacterial α-diversity was positively correlated with both seasonal variations of temperature and precipitation. Furthermore, piecewise structural equation models showed that seasonal variations of temperature or precipitation directly promoted soil bacterial α-diversity in each dataset. However, it is noteworthy that the importance of seasonal climate variations might be underestimated in the above analyses, due to the high level of environmental variations irrelevant to climate seasonality among sampling sites and the lack of sampling across seasons. Supplementary analyses of a previously published wheat cropland dataset with samples collected in both summer and winter across North China Plain was conducted. Similarly, we found that bacterial α-diversity was positively correlated with seasonal climate variations, but much stronger, though the range of seasonal climate variations was much smaller compared to the two global datasets. Collectively, these findings implied that fluctuation-dependent mechanisms of diversity maintenance presumably operate in soil bacterial communities. Based on existing evidence, we speculated that the storage effect may be the main mechanism responsible for diversity maintenance in soil bacterial community, but rigorous experimental tests are needed in the future.

scholarly journals Seasonal-to-Decadal Predictability and Prediction of South American Climate

2006 ◽  
Vol 19 (23) ◽  
pp. 5988-6004 ◽  
Author(s):  
P. Nobre ◽  
J. A. Marengo ◽  
I. F. A. Cavalcanti ◽  
G. Obregon ◽  
V. Barros ◽  
...  
Keyword(s):  
South America ◽  
Global Climate ◽  
South Atlantic Convergence Zone ◽  
Southeastern Brazil ◽  
Limiting Factor ◽  
South American ◽  
Climate Variations ◽  
Seasonal Climate ◽  
Tropical Ssts ◽  
Decadal Climate

Abstract The dynamical basis for seasonal to decadal climate predictions and predictability over South America is reviewed. It is shown that, while global tropical SSTs affect both predictability and predictions over South America, the current lack of SST predictability over the tropical Atlantic represents a limiting factor to seasonal climate predictions over some parts of the continent. The model’s skill varies with the continental region: the highest skill is found in the “Nordeste” region and the lowest skill over southeastern Brazil. It is also suggested that current two-tier approaches to predict seasonal climate variations might represent a major limitation to forecast coupled ocean–atmosphere phenomena like the South Atlantic convergence zone. Also discussed are the possible effects of global climate change on regional predictability of seasonal climate.

scholarly journals Seasonal climate variations in the Baltic Sea during the Last Interglacial based on foraminiferal geochemistry

2021 ◽  
Vol 272 ◽  
pp. 107220
Author(s):  
S. Ni ◽  
N.B. Quintana Krupinski ◽  
J. Chonewicz ◽  
J. Groeneveld ◽  
K.L. Knudsen ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Climate Variations ◽  
Last Interglacial ◽  
The Baltic Sea ◽  
Seasonal Climate ◽  
The Baltic

scholarly journals Response to Qian et al. (2017): Daily and seasonal climate variations are both critical in the evolution of species’ elevational range size

2018 ◽  
Vol 45 (12) ◽  
pp. 2832-2836 ◽  
Author(s):  
Wei-Ping Chan ◽  
I-Ching Chen ◽  
Robert K. Colwell ◽  
Wei-Chung Liu ◽  
Cho-ying Huang ◽  
...  
Keyword(s):  
Range Size ◽  
Climate Variations ◽  
Seasonal Climate ◽  
Elevational Range
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