Abstract：Time and space are two attributes of discourse, and discourse temporal-spatial dynamics has become more complex thanks to the rapid development of information technology. Drawing on theories of Systemic Functional Linguistics (SFL) and postulating that language constructs re¬ality, ecological analysis of discourse examines discourse to uncover the impact of language on ecology and environment. Based on the evolutionary typology of systems from SFL and via con¬crete case analysis, this paper defines discourse as an eco system of meaning and adopts an evo¬lutionary approach to the analysis of temporal-spatial dynamic discourse. Such an approach can help us better understand the pattern of change in discourse in quantitative terms and expand the linguistic functions of ecological analysis of discourse.
Key words: discourse analysis; meaning eco system; discourse temporal-spatial dynamic; evolu¬tionary thinking
