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ecosystem
Increasing the impulsive period τ, the system undergoes a series of period-doubling bifurcation leading to chaos, which implies that the dynamical behaviors of the periodically pulsed ratio-dependent predator-prey ecosystem are very complex.
      
To optimize the spatial structure of an ecosystem, a forest landscape was selected as a research object.
      
Based on the methods of landscape ecology and ecological planning, this paper develops a zoning project of ecosystem functions suitable for various environments.
      
Fourth, efficient measures should be taken to stop human activities that are harmful to Metasequoia and to improve the environment of ONMMT in order to promote the protection of the ONMMT population and its ecosystem.
      
Relationship and its ecological significance between plant species diversity and ecosystem function of soil conservation in semi
      
The role of biodiversity in the ecosystem, such as its influence on sustainability, stability, and productivity, is still not understood.
      
Fine roots have enormous surface areas, growing and turning over quickly, which plays an important role in terms of substance cycling and energy flow in the forest ecosystem.
      
Ecosystem health is the object of water and soil conservation and ecological building in loess hilly areas under erosion environment.
      
Using principles of ecosystem health quantitative assessment and diagnosis index selection, 17 factors were considered from three aspects: resource and environmental capacity, social and economic impact, and ecological services.
      
An evaluation index system on ecosystem health was established for a small watershed under erosion conditions.
      
The health dynamics of the ecosystem in the small watershed under erosion conditions was analyzed.
      
Results show that the watershed ecosystem is relatively stable and has an increasing annual fluctuation (0.370 in 1985 to 0.573 in 2003) for the health index.
      
At the same time, obstacles and advantages to the watershed ecosystem health were studied by introducing the concepts of obstacle degree and advantage, and path analysis method, considering the real economic optimal level as the uppermost goal.
      
Finally, suggestions on ecological building were provided as a scientific basis for ecosystem rehabilitation in the small watershed.
      
The soil microbial biomass and nutrient status under the native broadleaved forest and Cunninghamia lanceolata plantations at the Huitong National Research Station of Forest Ecosystem (in Hunan Province, midland of China) were examined in this study.
      
Plant species diversity of wetland ecosystem in an arid and semi-arid region in northwest China
      
Chemical contents in precipitation change significantly when different kinds of external chemical materials are added, removed, translocated and transformed to or in the forest ecosystem along with precipitation.
      
Also, the information is useful for diagnosing the function of ecosystems and evaluating the impact of the environment on the ecosystem.
      
Role of canopy interception on water and nutrient cycling in Chinese fir plantation ecosystem
      
The role of canopy interception on nutrient cycling in Chinese fir plantation ecosystem was studied on the basis of the position data during four years.
      
 

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