THE DIURNAL DYNAMIC PATTERNS OF SOIL RESPIRATION FOR DIFFERENT PLANT COMMUNITIES IN THE AGRO-PASTORAL ECOTONE WITH REFERENCE TO DIFFERENT MEASURING METHODS

2004 ◽  
Vol 28 (3) ◽  
pp. 318-325
Author(s):  
YANG Jing ◽  
HUANG Jian-Hui ◽  
ZHAN Xue-Ming ◽  
LI Xin ◽  
DU Li-Hua ◽  
...  
Keyword(s):  
Soil Respiration ◽  
Plant Communities ◽  
Measuring Methods ◽  
Dynamic Patterns ◽  
Diurnal Dynamic

Carbon dioxide exchange by native Great Plains grasses

1971 ◽  
Vol 49 (8) ◽  
pp. 1341-1345 ◽  
Author(s):  
Robert E. Redmann
Keyword(s):  
Carbon Dioxide ◽  
Soil Respiration ◽  
Water Potential ◽  
Plant Communities ◽  
Great Plains ◽  
Net Photosynthesis ◽  
Moisture Stress ◽  
Bouteloua Gracilis ◽  
Carbon Dioxide Exchange ◽  
Western North Dakota

Carbon dioxide exchange in relation to light and moisture stress was determined for dominants of three grassland plant communities of western North Dakota. These range from Bouteloua gracilis on very dry sites to Stipa viridula on less dry positions to Sporobolus heterolepis in moist ravines. Maximum net photosynthesis of sod transplants ranged from 10 to 12 mg CO2 g−1 h−1 (6 × 104 lx), corrected for soil respiration of about 3 mg CO2 dm−1 h−1. In B. gracilis and S. viridula, net photosynthesis declined steadily to 25% of maximum when moisture stress was increased to −30 bars soil matric water potential. Net photosynthesis declined less rapidly in S. heterolepis when moisture stress increased to −10 bars, but decreased to zero when stress reached −30 bars. The implications regarding distribution of the species are discussed.

STUDIES ON THE VEGETATION OF THE GASPÉ PENINSULA: II. THE SOIL RESPIRATION OF SOME PLANT COMMUNITIES

1962 ◽  
Vol 40 (1) ◽  
pp. 127-140 ◽  
Author(s):  
Helmut Lieth ◽  
Robert Ouellette
Keyword(s):  
Soil Respiration ◽  
Boreal Forest ◽  
Lower Limit ◽  
Plant Communities ◽  
Absorption Method ◽  
Forest Region ◽  
Middle Europe ◽  
Gaspe Peninsula ◽  
Boreal Forest Region ◽  
Gaspé Peninsula

The present study was undertaken to investigate the soil respiration of different communities of the boreal forest region in the Gaspé Peninsula. The measurements were done with an absorption method which is described in detail. Productivity of the vegetation in the Gaspé Peninsula is obviously very low. Consequently soil respiration is also very low. Compared with the data obtained with the same method in the temperate zone of middle Europe, our data lie near the lower limit of these values.

scholarly journals Plant community composition, not diversity, regulates soil respiration in grasslands

2008 ◽  
Vol 4 (4) ◽  
pp. 345-348 ◽  
Author(s):  
David Johnson ◽  
Gareth K Phoenix ◽  
J. Philip Grime
Keyword(s):  
Soil Respiration ◽  
Community Composition ◽  
Plant Community ◽  
Plant Communities ◽  
Functional Group ◽  
Plant Biomass ◽  
Terrestrial Ecosystems ◽  
Plant Species Richness ◽  
Plant Community Composition ◽  
Respiration Rates

Soil respiration is responsible for recycling considerable quantities of carbon from terrestrial ecosystems to the atmosphere. There is a growing body of evidence that suggests that the richness of plants in a community can have significant impacts on ecosystem functioning, but the specific influences of plant species richness (SR), plant functional-type richness and plant community composition on soil respiration rates are unknown. Here we use 10-year-old model plant communities, comprising mature plants transplanted into natural non-sterile soil, to determine how the diversity and composition of plant communities influence soil respiration rates. Our analysis revealed that soil respiration was driven by plant community composition and that there was no significant effect of biodiversity at the three levels tested (SR, functional group and species per functional group). Above-ground plant biomass and root density were included in the analysis as covariates and found to have no effect on soil respiration. This finding is important, because it suggests that loss of particular species will have the greatest impact on soil respiration, rather than changes in biodiversity per se .

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