关键词: 好氧甲烷氧化反硝化, 厌氧甲烷氧化反硝化, 微生物机理, 影响因素

Abstract: Studies on the structure and heterogeneity of urban vegetation landscape i11 Shenyang city showed that the most vegetation patches were in the street corner，accounted for more than 50％ of the total vegetation patch。and their
area was only 4．45％ of the total vegetation area．In terms of the size of the patches．the average area of shelter vegetation and park vegetation was 66．97 hm and 59．3 1 hm ，respectively。while that of street com er vegetation
and garden vegetation was 0．71 hm and 0．38 hm 。respectively．Street corner vegetation had the highest index of landscape diversity，while park vegetation had the lowest one． In the seven districts of Shenyang city，all types
of vegetation had a small landscape dom inance and e、，enness．but patch vegetation had a more than 10 times of landscape dominance than corridor vegetation，indicating that there was somewhat imbalance in the allocation of
different vegetation patch types ．It’S suggested that the quantity of patch vegetation should be increased，and the public vegetation should be distributed evenly．Increasing vegetation corridor iS also im portant because it can link
the downtown area tO the suburb natural vegetation ecosystems． For example．the South Canal Belt Park of Shenyang is a good vegetation corridor。which can beautify Shenyang city，discharge sewage，drain flo d，and improve microclimate．

Key words: aerobic methane oxidation coupled to denitrification (AME-D), anaerobic methane oxidation coupled to denitrification (ANME-D), microbial mechanism, affecting factor.