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ABSTRACT: In this paper, the colonization of arbuscular mycorrhizal fungi (AMF) on the root samples of 4 Alnus species in Changbai Mountains was investigated by using nested PCR-RFLP technique, and the PCR results were tested by restriction endonuclease analysis method. The results revealed that the uncultured AMF had a high genetic diversity, and the colonization had a trend from promiscuity to specialization. The AMF from Alnus mandshuica showed the greatest specialization to the host, and Glomus was the dominant colonizer of A. mandshuica. The AMF from A. sibirica var. hirsuta, A. sibirica, and A. tinctoria showed promiscuity, and host had more significant effects on the colonization of AMF than altitude.
Ying yong sheng tai xue bao = The journal of applied ecology / Zhongguo sheng tai xue xue hui, Zhongguo ke xue yuan Shenyang ying yong sheng tai yan jiu suo zhu ban 11/2006; 17(10):1796-800.
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ABSTRACT: Shenyang city is located in the intersect zone among Changbai, Mongolia and North China flora, which has a plenty of plant species belonging to 98 families, 371 genera and 779 species. There are 85 plant species in the largest family Companulaceae, and more than 20 species in the families Cyperaceae, Rosaceae, Leguminoseae, Polygonuceae, Labiatae, Lilaceae and Ranunculaceae. These families have 384 species in total, and 49.3% of them are found in Shenyang city. The flora had 23 geographical components types, and 89.3% of them were of the temperate type. Based on the epigenesis and functions of vegetation and the role of the dominant species, the urban vegetation in the downtown area of Shenyang was divided into 3 vegetation classes, 14 vegetation groups and 57 vegetation types, and the components, structure, dynamics and functions of 3 representative vegetation classes were analysised.
Ying yong sheng tai xue bao = The journal of applied ecology / Zhongguo sheng tai xue xue hui, Zhongguo ke xue yuan Shenyang ying yong sheng tai yan jiu suo zhu ban 01/2004; 14(12):2095-102.
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ABSTRACT: Studies on the structure and heterogeneity of urban vegetation landscape in Shenyang city showed that the most vegetation patches were in the street corner, accounted for more than 50% of the total vegetation patch, and their area was only 4.45% of the total vegetation area. In terms of the size of the patches, the average area of shelter vegetation and park vegetation was 66.97 hm2 and 59.31 hm2, respectively, while that of street corner vegetation and garden vegetation was 0.71 hm2 and 0.38 hm2, respectively. Street corner vegetation had the highest index of landscape diversity, while park vegetation had the lowest one. In the seven districts of Shenyang city, all types of vegetation had a small landscape dominance and evenness, but patch vegetation had a more than 10 times of landscape dominance than corridor vegetation, indicating that there was somewhat imbalance in the allocation of different vegetation patch types. It's suggested that the quantity of patch vegetation should be increased, and the public vegetation should be distributed evenly. Increasing vegetation corridor is also important because it can link the downtown area to the suburb natural vegetation ecosystems. For example, the South Canal Belt Park of Shenyang is a good vegetation corridor, which can beautify Shenyang city, discharge sewage, drain flood, and improve microclimate.
Ying yong sheng tai xue bao = The journal of applied ecology / Zhongguo sheng tai xue xue hui, Zhongguo ke xue yuan Shenyang ying yong sheng tai yan jiu suo zhu ban 01/2004; 14(12):2085-9.
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ABSTRACT: The spatial features and attribute data of urban forests in Shenyang arboretum were acquired by using aerial photographs and field investigation. After systemic and quantitative analysis of the species composition and spatial distribution pattern of urban forest community based on geographic information system (GIS), the following results were achieved: 1) the vegetation in the arboretum was rich and in a good condition. Phellodendron amurense, Robinia pseudoacacia, and Ulmus punita were the main species according to their abundant individuals and relative dominance. The spatial distribution pattern of this vegetation indicated that it was in a growing level and in the best state for ecological benefits; 2) the tree species relative dominance based on vegetation quantity had no distinct relationship with the species abundance, and the species having abundant individuals might have a low relative dominance; and 3) the curve displayed in the relationship diagram between tree individuals and tree height showed ascending and protruding. With the increment of tree height class, the individuals were unchanged nearly at the beginning, but when the height was more than 12 m, the individuals reduced distinctly, and the curve displayed a quickly declined trend. The relationship between tree individuals and tree diameter at the breast height (DBH) showed the same result.
Ying yong sheng tai xue bao = The journal of applied ecology / Zhongguo sheng tai xue xue hui, Zhongguo ke xue yuan Shenyang ying yong sheng tai yan jiu suo zhu ban 01/2004; 14(12):2090-4.
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ABSTRACT: Dust pollution is much heavier in winter than in other seasons in the cities of Northeast China, because the urban heating system consumes mainly coal as energy resources. Deciduous trees can hardly absorb dust because of their defoliation, and hence, urban conifer trees become more important in dust absorption in winter. This paper studied the dust absorption ability of 7 conifers under the same and different dust pollution status in Shenyang city, Northeast China. The results showed that the dust absorption ability of conifers was decreased in the order of Abies holophilla > Picea mongolica > P. koraiensis > Taxus cupidata > Pinus bungeana > P. armandi > P. tabulaeformis. Different conifers had different surface structures. Pinus bungeana, P. armandi and P. tabulaeformis had smooth surfaces, their cells and stomata arranged in order, and hence, their dust absorption ability was poor. P. koraiensis, Abies holophilla and Taxus cupidata had coarse surfaces, and their cells and stomata arranged out of order. There were even many tubercular things on the surface of P. koraiensis, and hence, their dust absorption ability was stronger. The dust absorption ability of conifers was related the shape of their leaf sections. The upper leaf surface of Pinus bungeana and P. tabulaeformis was arc, not opted to absorb the dust. The leaf section of P. armandi was prism, and its upper surface was narrow, and hence, its dust absorption ability was also poor. The leaves of Picea mongolica and P. koraiensis had four edges, their upper surfaces were broader and flatter than the former three species, and hence, they had stronger dust absorption ability. The leaf section's shape of Abies holophilla and Taxus cupidata was also broad and flat, which made the dust absorption ability of the two latter's was stronger than other three Pinus species and two Picea species.
Ying yong sheng tai xue bao = The journal of applied ecology / Zhongguo sheng tai xue xue hui, Zhongguo ke xue yuan Shenyang ying yong sheng tai yan jiu suo zhu ban 12/2003; 14(12):2113-6.
