Fine roots and mycorrhizal fungi accelerate leaf litter decomposition in a northern hardwood forest regardless of dominant tree mycorrhizal associations

2020 ◽  
Author(s):  
Ashley K. Lang ◽  
Fiona V. Jevon ◽  
Corinne R. Vietorisz ◽  
Matthew P. Ayres ◽  
Jaclyn Hatala Matthes
Keyword(s):  
Leaf Litter ◽  
Litter Decomposition ◽  
Mycorrhizal Fungi ◽  
Fine Roots ◽  
Leaf Litter Decomposition ◽  
Hardwood Forest ◽  
Northern Hardwood Forest ◽  
Northern Hardwood ◽  
Mycorrhizal Associations

Soil warming in a northern hardwood forest: trace gas fluxes and leaf litter decomposition

1998 ◽  
Vol 28 (9) ◽  
pp. 1365-1372 ◽  
Author(s):  
Patrick J McHale ◽  
Myron J Mitchell ◽  
Francis P Bowles
Keyword(s):  
Soil Temperature ◽  
Leaf Litter ◽  
Litter Decomposition ◽  
Hardwood Forest ◽  
Trace Gas ◽  
Northern Hardwood Forest ◽  
American Beech ◽  
Northern Hardwood ◽  
Gas Fluxes ◽  
Trace Gas Fluxes

The response of trace gas fluxes (CO2, CH4, and N2O) and litter decomposition to increased soil temperature was evaluated in a northern hardwood forest. Four experimental plots (10 × 10 m) had heating cables installed within the forest floor. Temperatures at 5 cm were increased 2.5, 5.0, or 7.5°C in individual heated plots during the field season in 1993 and 1994. The fourth plot was a cabled, nonheated reference. Trace gas fluxes were monitored using closed chambers. Soil moisture was monitored using tensiometers and time domain reflectometry. Changes in leaf litter decomposition were quantified using litter bags for American beech (Fagus grandifolia Ehrh.) and sugar maple (Acer saccharum Marsh.) litter. Fluxes of CO2 increased exponentially with increased soil temperatures within treatments and were higher in heated plots than in the reference plot. Temperature coefficients (Q10) and mass remaining of American beech leaf litter decreased with the level of heating, suggesting a nonlinear microbial response to elevated temperatures. Soil water content exhibited the most influence on CH4 and N2O flux in the second season. The experimental manipulations showed the importance of evaluating the influence of soil temperature coupled with effects of N and moisture availability.

Effects of Calcium on the Rate and Extent of Litter Decomposition in a Northern Hardwood Forest

Ecosystems ◽  
2015 ◽  
Vol 19 (1) ◽  
pp. 87-97 ◽  
Author(s):  
Gary M. Lovett ◽  
Mary A. Arthur ◽  
Katherine F. Crowley
Keyword(s):  
Litter Decomposition ◽  
Hardwood Forest ◽  
Northern Hardwood Forest ◽  
Northern Hardwood

Chronic experimental NO3− deposition reduces the retention of leaf litter DOC in a northern hardwood forest soil

2006 ◽  
Vol 38 (6) ◽  
pp. 1340-1347 ◽  
Author(s):  
Kurt A. Smemo ◽  
Donald R. Zak ◽  
Kurt S. Pregitzer
Keyword(s):  
Forest Soil ◽  
Leaf Litter ◽  
Hardwood Forest ◽  
Northern Hardwood Forest ◽  
Northern Hardwood

The Demography of Fine Roots in a Northern Hardwood Forest

Ecology ◽  
1992 ◽  
Vol 73 (3) ◽  
pp. 1094-1104 ◽  
Author(s):  
Ronald L. Hendrick ◽  
Kurt S. Pregitzer
Keyword(s):  
Fine Roots ◽  
Hardwood Forest ◽  
Northern Hardwood Forest ◽  
Northern Hardwood

Fine root turnover in a northern hardwood forest: a direct comparison of the radiocarbon and minirhizotron methods

2002 ◽  
Vol 32 (9) ◽  
pp. 1692-1697 ◽  
Author(s):  
Geraldine L Tierney ◽  
Timothy J Fahey
Keyword(s):  
Fine Roots ◽  
Fine Root ◽  
Age Distribution ◽  
Hardwood Forest ◽  
Root Turnover ◽  
Northern Hardwood Forest ◽  
Fine Root Turnover ◽  
Northern Hardwood ◽  
Root Age ◽  
Long Term Observation

We examined fine root turnover using both the minirhizotron and radiocarbon methods within the organic horizon of a northern hardwood forest to better understand discrepancies in turnover estimates obtained using these methods. The recently developed radiocarbon method estimates the mean age of organic matter by comparing its radiocarbon content to recorded atmospheric radiocarbon levels, which peaked in the 1960s as a result of thermonuclear weapons testing. The radiocarbon content of fine roots harvested from minirhizotron tubes did not differ from that of roots collected from the soil, suggesting these two methods sampled the same population of fine roots. However, long-term observation of fine root survivorship using minirhizotrons showed that root age distribution is positively skewed, causing systematic overestimation of fine root turnover by the minirhizotron method and underestimation by the radiocarbon method. We developed a parametric regression model of fine root survivorship. Our estimate of fine root turnover (about 30% per year) using this variation of the minirhizotron method was supported by radiocarbon data considered in conjunction with fine root age distribution.

Effects of Temperature and Light on Photosynthesis of Dominant Species of a Northern Hardwood Forest

1988 ◽  
Vol 149 (2) ◽  
pp. 203-208 ◽  
Author(s):  
Thomas W. Jurik ◽  
James A. Weber ◽  
David M. Gates
Keyword(s):  
Dominant Species ◽  
Hardwood Forest ◽  
Northern Hardwood Forest ◽  
Northern Hardwood ◽  
Effects Of Temperature
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