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- KOREAN
- P-ISSN2287-8327
- E-ISSN2288-1220
- SCOPUS, KCI
ISSN : 2287-8327
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e-SubmissionVol.27 No.6
Abstract
This study was carried out to on liana dominating at the vicinity of Onsan Industrial Complex declining P. thunbergii foersts. It was surveyed 16 species, 30 species and 50 species at upper, middle and understory, respectively. It was dominant P. thunbergii at upperstory, and P. densiflora, P. thunbergii, Quercus dentata and Q. serrata at middlestory, and Smilax china, Paederia scandens, Symplocos chinensis var. sinuata, Styrax japonica, Lonicera japonica and Q. serrata etc. at understory. It was the highest importance value(13.2) of S. china among all liana, and in order of L. japonica (11.7), P. scandens (11.5) and Cocculus trilobus (7.7). Number of species, Species diversity, Maximum species diversity, Evenness and Dominance of woody plants at upperstory and middlestory by each survey site were higher in forest areas than industrial complex, but those of understory highly showed at industrial complex, and ratio of liana at understory was high . It showed total 50 species at herbaceous plants, and was high I.V. of Pteridium aquilinum var. latiusculum, Spodiopogon cotulifer, Commerelina commuris, Phytolacca americana, Rubus parvifolius, Miscanthussinensis var. purpurascens and Calamagrostis arundinacea, etc.
Abstract
This study was carried out to analyze pH, Electrical conductivity(EC), cation and anion on rainfall and throughfall raining at industrial area(Onsan and Nongso of Ulsan city), suburban area(Myeongsek-myeon of Jinju city) and rural area(Haman and Changyoung-gun), and to investigate SO2 and NO2 concentration in the air of industrial area and rural area, and to survey degree of decline of Pinus thunbergii growing at each area. The rainfall pH was higher than the throughfall pH at the all surveyed areas. The rainfall pH and throughfall pH was 4.76∼5.15 and 4.64∼4.98, 4.95∼5.30 and 4.87∼5.13, 5.29∼5.76 and 5.12∼5.73 at the industrial area, suburban area and rural area, respectively. The EC of rainfall and throughfall was 13.64∼17.22 and 41.6 0∼103.59, 4.18∼8.65 and 17.02∼23.89, 4.09∼6.65 and 13.75∼21.44 at the industrial area, suburban area and rural area, respectively. Generally EC at the industrial area was higher than those of suburban area and rural area. In the correlation analysis among Degree of decline on Pinus thunbergii and ingredients of rainfall, it showed that there was a negative correlation between Degree of decline and pH. There was a positive correlation between pH and Cl- respectively.
Abstract
In order to elucidate the ecophysiological characteristics of coastal plants, we collected them on salt marsh and sand dune, and analyzed inorganic (Na+, K+, Mg2+, Ca2+) and organic solutes (soluble carbohydrate, glycine betaine). Chenopodiaceous plant species (Atriplex gmelini, Salicornia europaea, Salsola collina, Suaeda glauca, Suaeda japonica) showed a tendency to accumulate inorganic ions such as Na+ and Cl- instead of K+. However, Chenopodium serotinum which lives in ruderal habitat contained more K+ and less Na+ than the other Chenopodiaceous plants. Most Chenopodiaceous plant species maintained very low level of soluble Ca2+ and relatively low concentration of carbohydrates and showed high concentration of glycine betaine which is among the most effective known compatible solutes in the leaves of plant under drought and saline conditions. On the other hand, plant species which belong to Gramineae (Ishaemum anthephoroides, Phragmites communis, Zoysia sinica) and Cyperaceae (Carex kobomugi, Carex pumila) absorbed K+ selectively and excluded Na+ and Cl- effectively regardless of habitat conditions, and they accumulated more soluble carbohydrate as osmoticum than Chenopodiaceous plants. These results suggested that physiological characteristics such as high storage capacity for inorganic ions (especially alkali cations, chloride) and the accumulation of glycine betaine in chenopodiaceous plants and K+preponderance, an efficient regulation of ionic uptake (exclusion of Na+ and Cl-) and the accumulation of soluble carbohydrate in monocotyledonous plants enable them to grow dry and saline habitats.
Abstract
Photosyntheticaly active radiation (PAR) beneath the forest canopy, understory species richnessand diversity, and biomass were measured in a Larix leptolepis plantation seven years after thinning in 1997. The current PAR values were lower than those measured four years after thining, and PAR at the heavy thinning plots was significantly higher than that of other thining intensities. A total of 23 species including 9 tal-trees and 14 shrubs were found for the high layer while a total of 82 species including 10 tal-tres, 29 shrubs, and 43 herbs for the low layer. Species richness and diversity generaly increased with thinning intensities, and the trends were more evident for the low layer. Aboveground biomass significantly difered among thining intensities for both shrubs and herbs. Also there was a negative correlation between biomass and the current forest floor, species richness and diversity and production of understory vegetation continued seven years after the treatment.
Abstract
The water strider, Gerris paludum insularis, was reared in a growth cabinet at two constant temperatures and ≈20℃ under a 16:8 (L:D) photoperiod. Differences in head width among three temperatures of ≈20℃, 25℃ and 30℃ in G. paludum insularis, were compared. Temperature affected growth of head width of G. paludum insularis. There were highly significant differences among head width for three temperature regimes and the immature stages. It was found that head width is greater in 30℃ than 25℃ and ≈20℃. The growth quantity of the head width in ≈20℃ shows the slowest increase, and 25℃ and 30℃ were gradually increased in that order. The maximum ratio of growth quantity by each stage is in the first instar in all regimes. The growth rates of all regimes show an increase pattern.