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Climate change

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Ecology, Evolution and Organismal Biology Publications

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Full-Text Articles in Life Sciences

Temporal Variability Of Soil Respiration In Experimental Tree Plantations In Lowland Costa Rica, James W. Raich Jan 2017

Temporal Variability Of Soil Respiration In Experimental Tree Plantations In Lowland Costa Rica, James W. Raich

Ecology, Evolution and Organismal Biology Publications

The principal objective of this study was to determine if there is consistent temporal variability in soil respiration from different forest plantations in a lowland tropical rainforest environment. Soil respiration was measured regularly over 2004 to 2010 in replicated plantations of 15- to 20-year-old evergreen tropical trees in lowland Costa Rica. Statistically significant but small differences in soil respiration were observed among hours of the day; daytime measurements were suitable for determining mean fluxes in this study. Fluxes varied more substantially among months, with the highest average emissions (5.9 μmol·m−2·s−1) occurring in September and low ...


Interannual Water-Level Fluctuations And The Vegetation Of Prairie Potholes: Potential Impacts Of Climate Change, Arnold G. Van Der Valk, David M. Mushet Dec 2016

Interannual Water-Level Fluctuations And The Vegetation Of Prairie Potholes: Potential Impacts Of Climate Change, Arnold G. Van Der Valk, David M. Mushet

Ecology, Evolution and Organismal Biology Publications

Mean water depth and range of interannual water-level fluctuations over wet-dry cycles in precipitation are major drivers of vegetation zone formation in North American prairie potholes. We used harmonic hydrological models, which require only mean interannual water depth and amplitude of water-level fluctuations over a wet–dry cycle, to examine how the vegetation zones in a pothole would respond to small changes in water depth and/or amplitude of water-level fluctuations. Field data from wetlands in Saskatchewan, North Dakota, and South Dakota were used to parameterize harmonic models for four pothole classes. Six scenarios in which small negative or positive ...


Methane Emissions From Global Rice Fields: Magnitude, Spatiotemporal Patterns, And Environmental Controls, Bowen Zhang, Hanqin Tian, Wei Ren, Bo Tao, Chaoqun (Crystal) Lu, Jia Yang, Kamaljit Banger, Shufen Pan Aug 2016

Methane Emissions From Global Rice Fields: Magnitude, Spatiotemporal Patterns, And Environmental Controls, Bowen Zhang, Hanqin Tian, Wei Ren, Bo Tao, Chaoqun (Crystal) Lu, Jia Yang, Kamaljit Banger, Shufen Pan

Ecology, Evolution and Organismal Biology Publications

Given the importance of the potential positive feedback between methane (CH4) emissions and climate change, it is critical to accurately estimate the magnitude and spatiotemporal patterns of CH4 emissions from global rice fields and better understand the underlying determinants governing the emissions. Here we used a coupled biogeochemical model in combination with satellite‐derived contemporary inundation area to quantify the magnitude and spatiotemporal variation of CH4 emissions from global rice fields and attribute the environmental controls of CH4 emissions during 1901–2010. Our study estimated that CH4 emissions from global rice fields varied from 18.3 ± 0.1 Tg CH4 ...


Moving Forward In Global-Change Ecology: Capitalizing On Natural Variability, Inés Ibáñez, Elise S. Gornish, Lauren Buckley, Diane M. Debinski, Jessica Hellmann, Brian Helmuth, Janneke Hillerislambers, Andrew M. Latimer, Abraham J. Miller-Rushing, Maria Uriarte Jan 2013

Moving Forward In Global-Change Ecology: Capitalizing On Natural Variability, Inés Ibáñez, Elise S. Gornish, Lauren Buckley, Diane M. Debinski, Jessica Hellmann, Brian Helmuth, Janneke Hillerislambers, Andrew M. Latimer, Abraham J. Miller-Rushing, Maria Uriarte

Ecology, Evolution and Organismal Biology Publications

Natural resources managers are being asked to follow practices that accommodate for the impact of climate change on the ecosystems they manage, while global-ecosystems modelers aim to forecast future responses under different climate scenarios. However, the lack of scientific knowledge about short-term ecosystem responses to climate change has made it difficult to define set conservation practices or to realistically inform ecosystem models. Until recently, the main goal for ecologists was to study the composition and structure of communities and their implications for ecosystem function, but due to the probable magnitude and irreversibility of climate-change effects (species extinctions and loss of ...