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Bulletin of Botanical Research ›› 2019, Vol. 39 ›› Issue (4): 578-589.doi: 10.7525/j.issn.1673-5102.2019.04.012

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Characteristics and Coupling Relations of Green Space in Major Areas of Harbin

GUAN Yue-Yuan1, ZHU Si-Yu2, YI Zhao-Qin1, WU Yan1, MU Li-Qiang1   

  1. 1. College of Forestry, Northeast Forestry University, Harbin 150040;
    2. China Wildlife Conservation Association, Beijing 100000
  • Received:2019-03-05 Online:2019-07-05 Published:2019-07-03
  • Supported by:
    Investigation and Research on Forestry Alien Species in Heilongjiang Province(KJZXSA2018020);Application and Promotion Demonstration of Exotic Plants in Landscape Greening in Harbin(2017RAQXJ059)

Abstract: The plant diversity of 17 green spaces in Harbin was investigated by sample method, and the influence of native plant diversity on alien plants in urban green space ecosystem was studied. There are 75 alien plants, 42 alien cultivated plants and 33 alien non-cultivated plants in green space of Harbin. In the greenbelt plant community of Harbin, the average coverage, average importance and average frequency of exotic cultivated plants are higher, while the average coverage and average importance of exotic non-cultivated species are lower, but the average frequency of exotic non-cultivated species is higher. The number of native plant species was positively correlated with the number of exotic cultivated species and exotic non-cultivated species(P<0.01), and negatively correlated with the average frequency of exotic non-cultivated species(P<0.05). The Shannon-Will index and species richness of native plants in the arbor layer of green space were negatively correlated with the number of alien cultivated species and non-cultivated species(P<0.05). The homogeneity of native plants in the arbor layer was negatively correlated with the average frequency of non-cultivated species(P<0.01). The species richness of native plants in the shrub layer was negatively correlated with the average importance of exotic cultivated species(P<0.05); the evenness of native plants in herbaceous layer was positively correlated with the average relative coverage of non-cultivated species(P<0.05). With the increase of the total area of green space, the number of exotic cultivated species and exotic non-cultivated species increased, and the average frequency decreased significantly. With the increase of construction time, the average frequency of exotic cultivated species did not change linearly, while the average frequency of exotic non-cultivated species showed a decreasing trend. We should improve the diversity of native plants in Harbin green space, strictly control the introduction and cultivation management of alien plants in newly built green space with a small total area, in order to prevent the development of alien plants into invasive plants that endanger the local ecosystem.

Key words: exotic plants, urban green space, plant diversity, Harbin

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