1. 利用大型底栖无脊椎动物进行
河流生态系统健康评价
Assessing the River Health Using Benthic
Macroinvertebrate Assemblages
王备新
南京农业大学 昆虫系 水生昆虫与溪流生态实验室
Beixin Wang
Laboratory of aquatic insects and stream ecology
Department of Entomology, Nanjing Agricultural University
wangbeixin@njau.edu.cn
14. 2. Methods
2.1 Field work
64 sampling sites
( 15 reference
sites)
Five surber nets
each site
8 environmental
variables
including water
chemistry, habitat
variables,
watershed land
use upstream of
sampling sites
15. 2.2 Data analysis
Stepwise evaluating 36 candidate
metrics.
Crop, forest and urban land use in
upstream watershed of every site were
analyzed using satellite image and a
Digital Elevation Model.
Statistical analysis was performed by
SPSS 16.0.
16. 3. Results
B-IBI was composed of seven metrics:
Total taxa,
EPT taxa,
Coleoptera%,
Three dominant taxa,
(Hydropsychidae/Trichoptera) %,
Filterers%
Biotic Index (BI).
Fig.1 Box-plot of IBI in reference
sites (R) and stressed sites (S)
Table 1. Narrative interpretations and their numeric criteria (n=64)
Excellent Good Fair Poor
>4.64 3.15-4.64 2.34~3.15 <2.34
19. Sub-basin Riparian Local
entire drainage 200m buffer on each 200m buffer on
upstream from side of sample point each side of
sample point extending length of sample point
the drainage extending 1km
network upstream
Morley and Karr (2002)
20. Pearson’s coefficient=0.471, (p<0.001, n=101)
Pearson’s coefficient=-0.352, (p<0.001, n=101)
Fig. 2 the relationship among IBI and
the percentage of forest land use,
cropland use and urban land use at
the sub-basin scale.
Pearson’s coefficient=-0.421, (p<0.001, n=101)
21. Pearson’s coefficient=0.655, (p<0.001, n=100)
Pearson’s coefficient=-0.460, (p<0.001, n=100)
Fig. 3 the relationship among IBI and
the percentage of forest land use,
cropland use and urban land use at
the local scale.
Pearson’s coefficient=-0.444, (p<0.001, n=100)
22. Pearson’s coefficient=0.633, (p<0.001, n=100)
Pearson’s coefficient=-0.470, (p<0.001, n=100)
Fig. 4 the relationship among IBI and
the percentage of forest land use,
cropland use and urban land use at
the riparian scale.
Pearson’s coefficient=-0.397, (p<0.001, n=100)
37. Summary
1. Benthic macroinvertebrates have been used in
river health assessment in China.
2. Benthic Index of biological integrity (B-IBI) was
a sensitive indicator of stream health and had
close relationship with watershed land use
change and water nutrient enrichment in
Xitiaoxi watershed.
3. Predictive model might be a good alternative in
river health assessment in future.
4. More research on benthos-based assessment
is required to further enhance its important role
in the management of aquatic ecosystem.
38. Acknowledgements
All of my colleagues and students in our laboratory contributed to this study,
including Prof. Lianfang Yang, Dr. Changhai Su, Mr. Jie Zhang, Dr. Yong Zhang.
Many thanks to all my collaborators, including Dr. Yong Cao, Dr. Wei Liu, Dr.
Desuo Cai, Dr. Lizhu Wang, Dr. John C Morse, Dr. Richard Johnson, Dr. Robert
M. Hughes, Dr. Yangdong Pan, Dr. Susan K Jackson.
The studies were supported by NSFC and grants from MWR .