Chin J Plant Ecol ›› 2007, Vol. 31 ›› Issue (2): 252-261.DOI: 10.17521/cjpe.2007.0029

• Research Articles • Previous Articles     Next Articles

SOIL MICROBIAL FEEDBACKS TO CLIMATE WARMING AND ATMOSPHERIC N DEPOSITION

ZHANG Nai-Li1, GUO Ji-Xun2, WANG Xiao-Yu2, MA Ke-Ping1,*()   

  1. 1Laboratory of Quantitative Vegetation Ecology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
    2Northeast Normal University, Changchun 130024, China
  • Received:2006-06-28 Accepted:2007-01-22 Online:2007-06-28 Published:2007-03-30
  • Contact: MA Ke-Ping

Abstract:

Global warming, resulted from rising atmospheric greenhouse gases, has increased the Earth's surface temperature by 0.6 ℃ in the 20th century and will continue to increase it by approximately 1.4-5.8 ℃ in this century. The delivery of reactive forms of nitrogen to the environment through the sum of agricultural and industrial activities also exceeds that from natural processes. The ecological consequences arising from global warming and atmospheric N deposition have also become the very important issues of global change research. These changes not only impact the growth of aboveground vegetation and plant community structure, but also change belowground soil environment, and thus indirectly influence the microbial processes. Recent researches suggest that soil microbial responses to climate warming and atmospheric N deposition play an important role in the feedbacks of terrestrial ecosystems to climate change. Better understanding on the microbial responses to increasing temperature and N deposition is critical to predict the changes in terrestrial ecosystem C, N dynamics in the future.

From the viewpoints of microbial biomass, microbial activities and structure, litter decomposition, nutrient use and cycling, sequestration, retention and loss of nutrients, this article reviews recent advances research on microbial responses to climate warming and atmospheric N deposition. Consequence, taken from most of researches, shows that soil microbial community structure is more sensitive than soil microbial biomass and microbial activities to reflect global climatic change. Although much progress in research on impacts of climate warming and atmospheric N deposition on microbe has achieved, yet there are some questions unresolved: 1) amounts of short-term research cannot be used to predict the long-term influence of these global change drivers on microbe; 2) few researches on microbial turnover and interaction in nutrient cycling; 3) interactive effects among different global change drivers to soil microbe. Therefore, more efforts should be taken to study the long-term influence of these global change drivers on microbe and analyze the change in microbial process with soil environmental changes, and more attention should be paid to the microbial responses to global change drivers in natural ecosystems in future researches. In the near future, consequence of soil microbial response on global change will still be the key question that we should answer urgently.

Key words: climate warming, atmospheric N deposition, soil microbial biomass, soil microbial activity, soil microbial community structure