- ENGLISH
- P-ISSN2287-8327
- E-ISSN2288-1220
- SCOPUS, KCI
27권 4호
초록
Abstract
This study was about heavy metal accumulation in liver and kidney of Shorebirds migrating to Yeongjong and Sammok Island. Zinc concentration was highest in liver (76.7 ㎍/wet g) and kidney (65.7 ㎍/wetg) of Limosa lapponica to Yeongjong Island. In case of manganese, the highest accumulation in liver was Tringa nebularia to Yeongjong Island, and in kidney was Charadrius alexandrinus, to Sammok Island, respectively 4.68㎍/wet g, 18.6 ㎍/wet g. Copper concentration was the highest that in liver (25.4 ㎍/wet g) was Limosa lapponica to Yeongjong Island, in kidney (11.7 ㎍/wet g) was Tringa cinereus to Sammok Island. Calidris ruficollis to Sammok Island was the highest accumulated lead and concentration was 17.0 ㎍/wet g in liver, 40.2 ㎍/wet g in kidney. Lead concentration was more in kidney than in liver. Cadmium concentration in liver was the highest accumulated Calidris alpina (0.73±0.26 ㎍/wet g) to Yeongjong Island, in kidney was the highest accumulated Charadrius alexandrinus (4.89±1.49 ㎍/wet g) to Yeongjong Island. Cadmium concentration was higher in kidney than in liver to all species. Therefore, lead and cadmium concentration was more to Yeongjong than to Sammok Island in liver and kidney except Calidris tenuirostris.
초록
Abstract
Effects of nitrogen and phosphorus fertilization on seasonal changes of nutrient content in tree components, and retranslocation N and P in foliage and twig were determined in adjacent 41-year-old plantations of Pinus rigida Miller and Larix kaempferi Gordon on a similar soil in Yangpyeong, Gyeonggi Province. In general, foliage N and P concentrations of L. kaempferi were significantly higher than current and 1-year-old foliages of P. rigida. N and P concentrations were higher in foliage than in twigs for both tree species. However, there were no significant differences in foliage and twig N and P concentrations with ages. Significant seasonal differences in foliage and twig N and P concentrations were observed for both tree species because of nutrient retranslocation. Foliage nutrient concentrations were highest in the mid-growing season and lowest in autumn, whereas twig nutrient concentrations have gradually increased since July. These seasonal trends indicated nutrient retranslocation from foliage into twigs before foliage senescence. However, there were no significant changes in foliage and twig nutrient retranslocation, and no consistent patterns in foliage and twig nutrient retranslocation following N and P fertilizer additions. No significant changes in nutrient retranslocation between different foliage and twig ages were observed following fertilization.
초록
Abstract
The complex ecological researches were made in the broad-leaved forest zone of Central Europe in nature reserves and national parks located on the banks of the river (hydrology, vegetation, soils, unconfined ground waters). The natural conditions of terrestrial ecosystems and natural sites were compared along the course of the rivers. The significant negative influence of low-dammed (low-confined hydrotechnic) construction and small reservoirs on vegetation and soils of floodplain was revealed. On the basis of analysis of mean annual water level and flow trends on the multi-years series (60~100 years) of the hydrometric stations on the rivers under consideration the significant influence of natural long-term variability of watering on vegetation dynamics in the floodplains was revealed.
초록
Abstract
The purpose of this study is to clarify the effects of the conversion of the forest management type from a natural deciduous broad-leaved forest to an artificial evergreen coniferous forest based on organic matter dynamics. We investigated the amounts and carbon contents of the forest floor and the litterfall, soil chemical characteristics and cellulose decomposition rates in the natural deciduous broad-leaved forest and adjacent artificial evergreen coniferous forest. In the artificial evergreen coniferous forest were planted Japanese cypress (Chamaecyparis obtusa) on the upper slope and Japanese cedar (Cryptomeria japonica) on the lower slope. The soil carbon and nitrogen contents, CEC and microbial activity had decreased due to the conversion of the forest management type from a natural deciduous broad-leaved forest to an artificial Japanese cypress forest, and were almost the same for the conversion to a Japanese cedar forest. Under the same conditions, it is considered that the soil fertility was different by planting specific tree species because the organic matter dynamics were changed by them.
초록
Abstract
The impact of slash and burning on microbial biomass C, N and P in soils of semi-evergreen tropical deciduous forest were studied from February 1999 to January 2000. The experimental sites were located near Moreh town in the Chandel district of Manipur state (India) along the Indo-Myanmar border between 23°49′ N ~ 24°28′N latitude and 93°45′E ~ 94°16′E longitude. Microbial biomass C ranged from 319.50 μg g-1 to 905.50 μg g-1 in the slash and burnt site and from 209.50 μg g-1 to 708.80 μg g-1 soil in the forest site. Microbial N ranged from 19.30 μg g-1 to 99.45 μg g-1 in the slash and burnt site and from 16.08 μg g-1 to 88.90 μg g-1 in the forest site. Microbial P varied from 10.90 μg g-1 to 32.21 μg g-1 in the slash and burnt site and from 2.50 μg g-1 to 17.60 μg g-1 in the forest site in different months throughout the year. Microbial biomass C, N and P were recorded to be higher in the slash and burnt site compared to the forest site .The conversion of forest into slash and burnt site for agriculture - the traditional shifting cultivation practiced by tribal people in the north- eastern India leads to addition of large amount of organic matter in the soil thereby exhibiting higher values of microbial biomass C, N and P in the recent slash and burnt site than that of the forest site. Relationship between the soil moisture, soil organic C and microbial biomass C, N and P were found to be correlated significantly in both the sites.
초록
Abstract
In this research we determined the levels of heavy metals in soil and metal-accumulating plants from a D military shooting site in the Kyungkido district of Korea. The data obtained may be useful in the development of methods for the efficient phytoremediation of contaminated soil. The total Cd, Cu, Pb, and Zn concentrations in the soil were found to be 1.67~5.04 mg/kg, 52.51~106.26 mg/kg, 37.24~90.32 mg/kg, and 111.45~188.19 mg/kg, respectively. These results show that the soil is contaminated with Cd and Cu, and this contamination is particularly severe in the case of Cd because of its high bioavailability (25~57% of the total metal in the soil is exchangeable). The high concentrations of heavy metals in the shoots of Persicaria thunbergii and Artemisia princeps var. orientalis indicate that these plants (all perennial herbs) accumulate heavy metal efficiently. Further, these plants were found to contain more Cd in its shoots (>60% of the total metal found in the plant) than any other plant; these results indicate that these native species are particularly suited to use in Cd phytoextraction.
초록
Abstract
In this review, we present the results of our ten years of study on beef cattle production as a means of preserving phytodiversity and landscape in the semi-natural grasslands of the Aso region of Japan. There are about 16,000 ha of semi-natural grasslands in the region. The grasslands are maintained for animal production through such activities as grazing, mowing, and controlled burning. The Shannon s diversity index values, as measured in the present study, were higher in the grazed sites than in the abandoned sites. The grazing activities thus seem to create suitable habitats for coexisting herbaceous species. The grassland grazed moderately over a long term was able to sustain more animals than the grassland unused over a long term.
초록
Abstract
The Simple biosphere model 2 (SiB2), which is one of the land surface models, simulates the exchange of momentum, energy and mass such as water vapor and carbon dioxide between atmosphere and biosphere, and includes the biochemical sub-model for representation of stomatal conductance and photosynthetical activities. Throughout the SiB2 simulation, the significant information not only to understand of water and carbon budget but also to make an analysis of interaction such as feed-back and -forward between environment and vegetation is given. Using revised SiB2-Paddy, one sample study which is the evaluation of the runoff in Chaophraya river basin according to land use/cover change is presented in this review. Hence, SiB2 is available in order to ecological studied, if revised SiB2 for realistic simulation about soil respiration, computing leaf area index, vegetation competition and soil moisture is improved.