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ISSN : 2287-8327

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Vol.42 No.4
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Vegetation and water characteristics of floating mat in a coastal lagoon as the habitat for endangered plant species

Journal of Ecology and Environment / Journal of Ecology and Environment, (P)2287-8327; (E)2288-1220
2018, v.42 no.4, pp.220-227
https://doi.org/10.1186/s41610-018-0090-3



& (2018). Vegetation and water characteristics of floating mat in a coastal lagoon as the habitat for endangered plant species. Journal of Ecology and Environment, 42(4), 220-227, https://doi.org/10.1186/s41610-018-0090-3
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Abstract

Background: To understand the ecological characteristics of floating mat in which endangered species of Iris laevigata and Menyanthes trifoliata inhabit, we surveyed the vegetation and water environments of a floating mat wetland and examined the relations between ecological characteristics of the mat. Results: Although Phragmites australis and Zizania latifolia were found at all experimental quadrats (n = 61) as the major vegetational components of the floating mat wetland, they showed relatively poor growth performances in terms of shoot height (< 2 m) and biomass production (< 300 g/m2) compared with those in soil-based wetlands because of oligotrophic water condition. The competitiveness and distribution of P. australis and Z. latifolia seemed to be determined by water level difference by micro-topography rather than water chemistry. Conclusion: P. australis and endangered plant species mainly occurred in the area of relatively shallow water, whereas Z. latifolia and deep-water species such as Scirpus fluviatilis mostly inhabit in the area of deep water on the floating mat. Continuously maintained water level and oligotrophic water condition in the floating mat appeared to be important environments for endangered species such as I. laevigata and M. trifoliata.

keywords
Floating mat wetland, Iris laevigata, Micro-environment, Menyanthes trifoliata, Phragmites australis, Zizania latifolia

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