Table 1.
Classification of included articles by micro-environmental factors covered
| Micro-environmental factors (n, %) | Detailed factor | Effect | Description |
|---|---|---|---|
| Water environment (32a, 24.1%) | |||
| Water level (25, 18.8%) | – | Curve relationship | An optimal range exists |
| Water quality (7, 5.3%) | Transparency (1) | Positive effects | Oncomelania hupensis were more likely to survive in water with high transparency |
| Chemical properties (6) | Need further research | Results from literatures conflict | |
| Soil environment (37a, 27.8%) | |||
| Soil properties (31, 23.3%) | Soil humidity, temperature (18) | Curve relationship | An optimal range exists |
| Soil pH value (7) | Curve relationship | An optimal range exists | |
| Soil fertility indexes (8b) organic compounds, total N, total P, total K, etc | Need further research | Results from literatures conflict | |
| Soil microorganisms (6, 4.5%) | Aspergillus fumigatus SL-30, Streptomyces violaceoruber, Xanthobacter autotrophicus, etc | Negative effects | These microorganisms have molluscicidal activity |
| Vegetation (72a, 54.1%) | |||
| Plant extracts (34, 25.6%) | Root, stem, and leaf extracts | Negative effects | These plant extracts have molluscicidal activity |
| Land cover vegetation characteristics (23, 17.3%) | Vegetation height, coverage (12) | Curve relationship | An optimal range exists |
|
Plant species (11) Cynodon dactylon, Alternanthera philoxeroides, Pterocarya stenoptera community and Nerium indicum community, Liquidambar formosana, Sapium sebiferum, etc |
Negative effects | O. hupensis are less distributed in areas with these vegetation types | |
| Snail control and schistosomiasis prevention forest (14, 10.5%) | – | Negative effects | The implementation of snail control and schistosomiasis prevention forest reduces the density of O. hupensis |
| Plant microorganisms (1, 0.8%) | Endophyte JJ18 of Pseudolarix amabilis | Negative effects | These microorganisms have molluscicidal activity |
| Predator (4a, 3.0%) | |||
| Procambarus clarkia, Ophiocephalus argus (4, 3.0%) | Negative effects | Predation reduces the density of O. hupensis | |
In the second column, the numbers in brackets represent the number of articles on related factors
aSome of the articles discussed more than one influencing factors
bTwo articles specified the subspecies O. hupensis quadrasi and showed that organic compounds had a positive impact on the snail survival