scholarly journals Object, theories and methods of material cycling science

资源科学 ◽  
2021 ◽  
Vol 43 (3) ◽  
pp. 435-445
Author(s):  
Zengwei YUAN ◽  
Mingjin CHENG ◽  
Keyword(s):  
Material Cycling

scholarly journals MATERIAL CYCLING IN A MANGROVE AREA

2004 ◽  
pp. 193-208 ◽  
Author(s):  
Yoshihisa AKAMATSU ◽  
Syunsuke IKEDA
Keyword(s):  
Mangrove Area ◽  
Material Cycling

Retention and Removal Efficiency of Riparian Wetlands on Non-Point Source Pollutants

2012 ◽  
Vol 260-261 ◽  
pp. 841-845 ◽  
Author(s):  
Jin Xu ◽  
Li Gang Xu ◽  
Lei Dong
Keyword(s):  
Point Source ◽  
Removal Efficiency ◽  
Cost Effective ◽  
Terrestrial Ecosystems ◽  
Buffer Zone ◽  
Lake Basin ◽  
Riparian Wetlands ◽  
Nitrogen And Phosphorus ◽  
Riparian Wetland ◽  
Material Cycling

Riparian wetlands is a very important buffer and transition zone between terrestrial ecosystems and aquatic ecosystems in the lake basin system. Its edge effects played a crucial ecological role in energy flow and material cycling. Riparian wetlands have been widely used as the treatment of wastewaters, pollution control and environmental enhancement have been gainning increasing interest and application. In this paper, a typical riparian wetland was selected as case study for retention and removal efficiency on non-point source pollutants. The experimental results showed that there was certain removal efficiency for nitrogen and phosphorus. But slight effectiveness improvements took place after wetlands have been operated for a few years. So their restoration should be implemented also with the objectives of increasing the purification efficiency of pollutants. Results in this study were helpful in providing the basis for theoretical basis of designing cost-effective lakeside buffer zone and in revealing the removal mechanism of nitrogen and phosphorus in reparian wetlands.

scholarly journals Reading Nature- experienced teachers’ reflections on a teaching sequence in ecology: implications for future teacher training

2012 ◽  
Vol 2 (3) ◽  
pp. 67-81 ◽  
Author(s):  
Ola Magntorn ◽  
Gustav Helldén
Keyword(s):  
Teacher Training ◽  
Primary Schools ◽  
Primary Teachers ◽  
Natural World ◽  
Ecological Literacy ◽  
Cd Rom ◽  
The Everyday ◽  
Material Cycling ◽  
Everyday Classroom ◽  
Previous Learning

This article explores experienced primary teachers views on teaching for ‘reading nature’. The concept ‘reading nature’ has to do with an ability to recognise organisms and relate them to material cycling and energy flow in the specific habitat which is to be read. It has to do with the natural world that we face outside and the tools we have are our experiences from previous learning situations both in and out-of-doors. The teachers were asked to comment on the content of a CD-ROM with teaching sequences from a primary class studying a river ecosystem. Perceptions that teachers held were found to be supportive but complex and varied regarding the possibilities and advantages of implementing this type of teaching design in the everyday classroom. The paper finishes by identifying some implications for teacher training to support fieldwork and ecological literacy in primary schools in the future.

scholarly journals Mountain Pine Beetle Infestation: Cycling and Succession in Lodgepole Pine Forests

1987 ◽  
Vol 11 ◽  
pp. 172-174
Author(s):  
W. Romme ◽  
J. Yavitt ◽  
D. Knight ◽  
J. Fedders
Keyword(s):  
National Parks ◽  
Mountain Pine Beetle ◽  
Stand Structure ◽  
Forest Succession ◽  
Fire Risk ◽  
Stand Productivity ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Material Cycling ◽  
Rates Of Growth

This work began in 1980 with the objective of studying the effects of mountain pine beetle outbreaks in Yellowstone and Grand Teton National Parks and the surrounding area. The inmediate effects of outbreaks on stand structure have been documented (Roe and Amman 1970, Amman and Cole 1980), but little is known about long-term influences on ecosystem processes such as primary productivity, material cycling, and succession. Thus, our research deals with the effects of beetle outbreaks on (1) rates of growth in surviving trees and total stand productivity, (2) dead woody fuels and fire risk, (3) forest succession, and (4) nutrient cycling.

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