Structure and taxonomic composition of free-living nematode and macrofaunal assemblages in a eutrophic subtropical harbour, Hong Kong.
The spatial and seasonal taxonomic composition patterns of macrofauna and nematodes in a eutrophic subtropical harbour, previously suffered from sewage pollution, were studied in relation to a number of sediment parameters. In the polluted, inner-harbour area, levels of organic contents and heavy metals were high, whereas species number, abundance and diversity of nematodes and macrofauna were the lowest in comparison to the cleaner, outer-harbour area. Different taxonomic composition patterns of nematodes and macrofaunal assemblages were found between inner-harbour and outer-harbour area, which was highly correlated with sediment nutrient levels. Different responses of macrofaunal and nematode communities to sewage pollution suggested that macrofauna might be more tolerant than nematodes to eutrophic conditions due to their ability to modify the sediment. The present findings indicated the usefulness of studying both nematode and macrofaunal communities, in order to reveal different aspects of the benthic ecosystems in response to organic enrichment.
Department of Biology and Chemistry, City University of Hong Kong, Hong Kong.
W Z
WZ
Xu
Department of Biology and Chemistry, City University of Hong Kong, Hong Kong; State Key Laboratory in Marine Pollution, City University of Hong Kong, Hong Kong.
S G
SG
Cheung
Department of Biology and Chemistry, City University of Hong Kong, Hong Kong; State Key Laboratory in Marine Pollution, City University of Hong Kong, Hong Kong. Electronic address: bhpshin@cityu.edu.hk.
Paul K S
PK
Shin
D000818:Animals; D058448:Biota; D002244:Carbon / Q000737:chemistry; D017753:Ecosystem; D004784:Environmental Monitoring / Q000379:methods; D005843:Geography; D019015:Geologic Sediments / Q000737:chemistry; D006723:Hong Kong; D019216:Metals, Heavy; D009348:Nematoda / Q000145:classification / Q000502:physiology*; D009930:Organic Chemicals; D025341:Principal Component Analysis; D012722:Sewage; D014873:Water Pollutants / Q000032:analysis
D019216:Metals, Heavy; D009930:Organic Chemicals; D012722:Sewage; D014873:Water Pollutants; D002244:Carbon
Diversity; Macrofauna; Nematodes; Organic enrichment; Recovery; Subtropics