scholarly journals Experimental nitrogen and phosphorus additions increase rates of stream ecosystem respiration and carbon loss

2017 ◽  
Vol 63 (1) ◽  
pp. 22-36 ◽  
Author(s):  
John S. Kominoski ◽  
Amy D. Rosemond ◽  
Jonathan P. Benstead ◽  
Vlad Gulis ◽  
David W. P. Manning
Keyword(s):  
Ecosystem Respiration ◽  
Carbon Loss ◽  
Nitrogen And Phosphorus ◽  
Stream Ecosystem

Energy and nutrients

2019 ◽  
pp. 161-176
Author(s):  
Richard T. Corlett
Keyword(s):  
Primary Production ◽  
Forest Ecology ◽  
Net Primary Production ◽  
Ecosystem Respiration ◽  
Gross Primary Production ◽  
Nitrogen And Phosphorus ◽  
New Information ◽  
Tropical Forest Ecology ◽  
Toxic Concentrations

This chapter deals with the ecology of Tropical East Asia from the perspective of water, energy, and matter flows through ecosystems, particularly forests. Data from the network of eddy flux covariance towers is revealing general patterns in gross primary production, ecosystem respiration, and net ecosystem production, and exchange. There is also new information on the patterns of net primary production and biomass within the region. In contrast, our understanding of the role of soil nutrients in tropical forest ecology still relies mostly on work done in the Neotropics, with just enough data from Asia to suggest that the major patterns may be pantropical. Nitrogen and phosphorus have received most attention regionally, followed by calcium, potassium, and magnesium, and there has been very little study of the role of micronutrients and potentially toxic concentrations of aluminium, manganese, and hydrogen ions. Animal nutrition has also been neglected.

scholarly journals Carbon exchange over four growing seasons for a subarctic sedge fen in northern Manitoba, Canada

2015 ◽  
Vol 1 (2) ◽  
pp. 27-44 ◽  
Author(s):  
Krista L. Hanis ◽  
Brian D. Amiro ◽  
Mario Tenuta ◽  
Tim Papakyriakou ◽  
Kyle A. Swystun
Keyword(s):  
Ecosystem Respiration ◽  
Net Ecosystem Exchange ◽  
Methane Flux ◽  
Carbon Gain ◽  
Carbon Loss ◽  
Growing Seasons ◽  
Water Tables ◽  
Flux Measurements ◽  
Peat Surface ◽  
Measurement Period

Net ecosystem exchange of carbon was measured using eddy covariance for four growing seasons at a subarctic hummocky fen in northern Manitoba, Canada. Over a 115 day measurement period each year, cumulative net ecosystem exchange of carbon ranged from a gain of 49 g C m−2to a loss of 16 g C m−2with a mean loss of 6 g C m−2from the fen, with an uncertainty of about ±34 g C m−2. Ecosystem respiration decreased with higher water tables (r2= 0.3), especially in one summer when flooding occurred to 0.12 m above the peat surface. Additional methane emissions previously documented for the site of 4–5.7 g C m−2year−1added to the carbon loss. Carbon loss was measured from this same fen in the 1990s and it is likely that the carbon gain (peat accumulation) during past centuries has not continued in recent decades. Scaling to annual greenhouse gas emissions as a 100 year global warming potential showed that this fen is currently a source of 192–490 g CO2-equivalents m−2year−1based on both carbon dioxide and methane flux measurements, indicating that peat is decomposing.

scholarly journals Warming homogenizes apparent temperature sensitivity of ecosystem respiration

2021 ◽  
Vol 7 (15) ◽  
pp. eabc7358
Author(s):  
Ben Niu ◽  
Xianzhou Zhang ◽  
Shilong Piao ◽  
Ivan A. Janssens ◽  
Gang Fu ◽  
...  
Keyword(s):  
Temperature Sensitivity ◽  
Ecosystem Respiration ◽  
Meta Analysis ◽  
Spatial Relationship ◽  
Terrestrial Ecosystem ◽  
Apparent Temperature ◽  
Carbon Loss ◽  
High Emission ◽  
Higher Temperature ◽  
Warming World

Warming-induced carbon loss through terrestrial ecosystem respiration (Re) is likely getting stronger in high latitudes and cold regions because of the more rapid warming and higher temperature sensitivity of Re (Q10). However, it is not known whether the spatial relationship between Q10 and temperature also holds temporally under a future warmer climate. Here, we analyzed apparent Q10 values derived from multiyear observations at 74 FLUXNET sites spanning diverse climates and biomes. We found warming-induced decline in Q10 is stronger at colder regions than other locations, which is consistent with a meta-analysis of 54 field warming experiments across the globe. We predict future warming will shrink the global variability of Q10 values to an average of 1.44 across the globe under a high emission trajectory (RCP 8.5) by the end of the century. Therefore, warming-induced carbon loss may be less than previously assumed because of Q10 homogenization in a warming world.

In-Situ CO2 Partitioning Measurements in a Phragmites australis Wetland: Understanding Carbon Loss through Ecosystem Respiration

Wetlands ◽  
2020 ◽  
Vol 40 (4) ◽  
pp. 901-914
Author(s):  
Xueyang Yu ◽  
Siyuan Ye ◽  
Linda Olsson ◽  
Mengjie Wei ◽  
Hans Brix
Keyword(s):  
Phragmites Australis ◽  
Ecosystem Respiration ◽  
Carbon Loss

scholarly journals Woody debris is related to reach-scale hotspots of lowland stream ecosystem respiration under baseflow conditions

Ecohydrology ◽  
2018 ◽  
Vol 11 (5) ◽  
pp. e1952 ◽  
Author(s):  
P.J. Blaen ◽  
M.J. Kurz ◽  
J.D. Drummond ◽  
J.L.A. Knapp ◽  
C. Mendoza-Lera ◽  
...  
Keyword(s):  
Ecosystem Respiration ◽  
Woody Debris ◽  
Stream Ecosystem ◽  
Lowland Stream

A 3-Year In-Situ Measurement of CO2 Efflux in Coastal Wetlands: Understanding Carbon Loss through Ecosystem Respiration and its Partitioning

Wetlands ◽  
2019 ◽  
Vol 40 (3) ◽  
pp. 551-562
Author(s):  
Xueyang Yu ◽  
Siyuan Ye ◽  
Linda Olsson ◽  
Mengjie Wei ◽  
Ken W. Krauss ◽  
...  
Keyword(s):  
Coastal Wetlands ◽  
Ecosystem Respiration ◽  
In Situ Measurement ◽  
Co2 Efflux ◽  
Carbon Loss

scholarly journals Using Stable Carbon Isotopes of Seasonal Ecosystem Respiration to Determine Permafrost Carbon Loss

2019 ◽  
Vol 124 (1) ◽  
pp. 46-60
Author(s):  
M. Mauritz ◽  
G. Celis ◽  
C. Ebert ◽  
J. Hutchings ◽  
J. Ledman ◽  
...  
Keyword(s):  
Carbon Isotopes ◽  
Stable Carbon Isotopes ◽  
Ecosystem Respiration ◽  
Stable Carbon ◽  
Carbon Loss
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