Photosynthesis and Fluctuating Asymmetry as Indicators of Plant Response to Soil Disturbance in the Fall‐Line Sandhills of Georgia: A Case Study Using Rhus copallinum and Ipomoea pandurata

2004 ◽  
Vol 165 (5) ◽  
pp. 805-816 ◽  
Author(s):  
D. Carl Freeman ◽  
Michelle L. Brown ◽  
Jeffrey J. Duda ◽  
John H. Graham ◽  
John M. Emlen ◽  
...  
Keyword(s):  
Fluctuating Asymmetry ◽  
Soil Disturbance ◽  
Plant Response ◽  
Rhus Copallinum ◽  
Fall Line

Leaf fluctuating asymmetry, soil disturbance and plant stress: a multiple year comparison using two herbs, Ipomoea pandurata and Cnidoscolus stimulosus

2005 ◽  
Vol 5 (2) ◽  
pp. 85-95 ◽  
Author(s):  
D. Carl Freeman ◽  
Michelle L. Brown ◽  
Jeffrey J. Duda ◽  
John H. Graraham ◽  
John M. Emlen ◽  
...  
Keyword(s):  
Fluctuating Asymmetry ◽  
Plant Stress ◽  
Soil Disturbance

scholarly journals A Case Study on TBM Cutterhead Temperature Monitoring and Mud Cake Formation Discrimination Method

2021 ◽  
Author(s):  
Jie Fu ◽  
Yimin Xia ◽  
Hao Lan ◽  
Dun Wu ◽  
Laikuang lin
Keyword(s):  
Temperature Variation ◽  
Tunnel Boring Machine ◽  
Soil Disturbance ◽  
Tunnel Boring ◽  
Mud Cake ◽  
Cake Formation ◽  
Slurry Shield ◽  
Construction Efficiency ◽  
Discrimination Method

Abstract The mud cake is easily formed during the tunnel boring machine (TBM) excavation in clay soils or rocks containing clay minerals. Mud cake will lead to soil disturbance, clogging cutterhead and even affect the construction efficiency and personnel safety. In this study, a mud cake formation discrimination method based on cutterhead temperature was proposed. An online monitoring system was designed and installed on the slurry shield TBM. The results show that: (a) the cutterhead temperature data can be reliably detected and transmitted by the system; (b) in a tunneling ring, the temperature at some positions of the cutterhead will increase first and then decrease; (c) during the field test, the temperature variation is around 2.5℃ under the normal condition, but the temperature variation will increase more than 50℃ due to the mud cake or geological change; (d) compared with the cooling rate, mud cake formation can be accurately discriminated.

Plant Response Following Soil Disturbance in a Longleaf Pine Ecosystem

2001 ◽  
Vol 128 (3) ◽  
pp. 208 ◽  
Author(s):  
Samuel M. Simkin ◽  
William K. Michener ◽  
Robert Wyatt
Keyword(s):  
Longleaf Pine ◽  
Soil Disturbance ◽  
Plant Response

scholarly journals A case study on TBM cutterhead temperature monitoring and mud cake formation discrimination method

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jie Fu ◽  
Yimin Xia ◽  
Hao Lan ◽  
Dun Wu ◽  
Laikuang Lin
Keyword(s):  
Temperature Variation ◽  
Tunnel Boring Machine ◽  
Soil Disturbance ◽  
Tunnel Face ◽  
Tunnel Boring ◽  
Mud Cake ◽  
Cake Formation ◽  
Construction Efficiency ◽  
Discrimination Method

AbstractThe mud cake is easily formed during the tunnel boring machine (TBM) excavation in clay soils or rocks containing clay minerals. Mud cake will lead to soil disturbance of tunnel face, clogging cutterhead and even affect the construction efficiency and personnel safety. In this study, a discrimination method of mud cake formation based on cutterhead temperature was proposed. An online monitoring system was designed and installed on the slurry balance TBM. The results show that: (a) the cutterhead temperature data can be reliably detected and transmitted by the system; (b) in a tunneling cycle, the temperature at some positions of the cutterhead will increase first and then decrease; (c) during the field test, the temperature variation is around 2.5 °C under the normal condition, but the temperature variation will increase more than 50 °C due to the mud cake or geological change; (d) compared with the cooling rate, mud cake formation can be accurately discriminated.

The application of fluctuating asymmetry in the monitoring of animal populations

1994 ◽  
Vol 1 (2) ◽  
pp. 118 ◽  
Author(s):  
Stephen Sarre ◽  
John M. Dearn ◽  
Arthur Georges
Keyword(s):  
Fluctuating Asymmetry ◽  
Morphological Characters ◽  
Directional Asymmetry ◽  
Management Tool ◽  
Inexpensive Method ◽  
Animal Populations ◽  
Considerable Length ◽  
Relationship Of ◽  
The Relationship

The maintenance of fitness levels is an important part of the management of animal populations. Unfortunately, measuring fitness and determining the relative contributions of genetic and environmental components to that fitness represent considerable problems for management. The simple and inexpensive method of measuring non directional asymmetry (fluctuating asymmetry) in bilateral morphological characters may provide a useful contribution to this problem. The relationship of levels of fluctuating asymmetry to fitness has been explored at considerable length in the scientific literature but this knowledge has yet to be used effectively by wildlife managers. We examine the potential of fluctuating asymmetry as a management tool and show by use of a case study of island and mainland populations of lizards, how it may be used as a comparative tool in which to determine populations that require management priority.

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