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http://dx.doi.org/10.13047/KJEE.2016.30.6.939

Distributional Characteristics and Factors Related to the Population Persistence, an Endangered Plant Glaux maritima var. obtusifolia Fernald  

Kim, Young-Chul (Dept. of Biology, Gangneung-Wonju National Univ.)
Chae, Hyun-Hee (Dept. of Biology, Gangneung-Wonju National Univ.)
Oh, Hyun-Kyung (Plants Resource Division, Biological Resources Research Dept., National Institute of Biological Resource)
Lee, Kyu-Song (Dept. of Biology, Gangneung-Wonju National Univ.)
Publication Information
Korean Journal of Environment and Ecology / v.30, no.6, 2016 , pp. 939-961 More about this Journal
Abstract
For effective conservation of endangered wild plants, it is necessary to understand their interactions with environmental factors in each habitat together with life traits of target species. First, the characteristics of their distribution were investigated followed by their monitoring for 4 years focusing on the habitats in the lagoon. Also, their life traits were compared including production of hibernacles, fruits, and seeds by the soil fertilization and light intensities. Next, the information on the species was secured by germination experiment using the generated seeds from the cultivation experiment. The habitat of Glaux maritima var. obtusifolia Fernald in Korea was located in the rear edge of the worldwide distribution and its four habitats were isolated and distributed far away each other. Two of them were located in small salt-marsh and fine sand estuaries formed in the rocky area of the seashore, and the other two were inhabited with the sandy soil in the lagoon which was connected by river-mouth to the sea. Glaux maritima var. obtusifolia Fernald tends to be distributed in the sites where the establishment and growth of the competitor were inhibited by salinity, periodic flooding, and lower layer of the soil to extend a roots. It maintained its population by recruitments of hibernacles and seedling. The production of hibernacle was assumed to be affected by the particle consist of the sand together with organic matters in the soil. Seedling recruitment was observed only in the salt-marsh area located in the rear sites of sand ridge where was the shore of the lagoon. Glaux maritima var. obtusifolia Fernald was observed to have different threatening factors by each population. Its population in Pohang seemed the sedimentation of fine sand which affected the recruitment of hibernacles had been eroded due to the construction of the coastal road. The population in Ulsan appeared rapid expansion of competitor and reduction of its distribution area due to the interruption of eluted water supplied to the habitat. On the other hand, the habitat in the lagoon maintained the population relatively stable. Especially, the population in Songji-ho was determined to be the most stable one. To sustain the population of Glaux maritima var. obtusifolia Fernald distributed in the lagoon, it is suggested that the wide ranged scale of conservational activities is necessary to maintain the mechanisms including the entrance of seawater which belongs to the lagoon, and periodic flooding.
Keywords
CONSERVATION; HIBERNACLES; PSEUDO-ANNUAL; MINIMUM DYNAMICS;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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