|Title:||Status and habitat preferences for endemic inhabitants of fiddler crab Uca formosensis in Hsiang-Shan wetland, Taiwan||Authors:||Liao, Shao Wei
CHANG, WEN LIAN
Lin, Shih Wei
|Keywords:||Canonical discriminant analysis | Sediment properties | Taiwan | Uca formosensis||Issue Date:||1-Aug-2008||Publisher:||SPRINGER||Journal Volume:||143||Journal Issue:||1-3||Start page/Pages:||203||Source:||Environmental Monitoring and Assessment||Abstract:||
This article reports on soil samples collected from Hsiang-Shan wetland, Taiwan. Canonical discriminant analysis (CDA) was applied to identify an existing habitat type's scheme by identifying the physico-chemical properties of sediment in Hsiang-Shan wetland. The three constructed discriminant functions (CDFs) showed a marked contribution by most of the discriminant variables, and the recognition capacities in these three CDFs were 49.5, 32.8 and 17.7%. Our study revealed that the most important latent factors in Hsiang-Shan wetland are soil texture-caused factor, ocean current-caused factor, nutrient-caused factor, and the redox reaction-caused factor. And the most sensitivity parameters in this habitat followed the descending order: OBD, EC, Eh, sand, TN, porosity, STP, silt, VCP and pH. And the inhabited sediment properties for U. formosensis in terms of soil texture are sand, silt, and clay (34.05, 29.72, and 32.35%, respectively): that is clay loam soil. We also found that U. formosensis preferred to inhabit the upper intertidal zone, spending 8.41% of the time submerged. Vegetation coverage on the ground was less than 2.20%, showing that it preferred to live in a bare intertidal habitat. Concerning nest choosing, excavating burrows is more difficult when a high soil penetration force is required, and in this study the soil penetration force for 20 cm was found to be is 45.98 N/ cm 2 . The results will be helpful in developing a methodology for use by the government in refining its management programs. © Springer Science+Business Media B.V. 2007.
|Appears in Collections:||生物環境系統工程學系|
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