| 摘要: |
| 自生植物具有多种生态功能，是人工建设环境中自
发形成的荒野景观。以公园城市示范区成都市为研究地，选取
贯穿主城区的3条河道样段，对其间多样微生境的自生植物物
种组成和多度格局进行探究。共记录自生植物336种，生活型
组成丰富。高频度及高多度的优势种所占比例很小，大部分物
种属于低多度低盖度。岸上和水边的荒置地、自然驳岸所含物
种数最多，而硬质驳岸支撑了更多蕨类植物。岸上绿地及铺装
缝隙外来植物在群落中的多度显著较少；退化草坪中的自生植
物也颇为丰富，夏季多年生草本在草坪群落中的多度显著高于
其他微生境。可根据不同生境中物种多度、盖度格局进行保护
和景观营建，以期更有效地提升城市河流廊道生态效益，并为
市民提供更多荒野体验。 |
| 关键词: 园林植物 自生植物 多度格局 多样性 生境异
质性 |
| DOI： |
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| 基金项目: |
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| Species Composition and Abundance Pattern of Spontaneous Plants Responding to Various Habitats along Urban River Corridors in Chengdu |
| LI Xiaopeng,FENG Li,HUANG Rui,LIU Baichuan,XU Sihui |
| Abstract: |
| Spontaneous plants have a variety of ecological
functions, which are wildscapes spontaneously occur in the built
environment. Taking Chengdu, the park city demonstration area,
as the research site, three river sample transects running through
the main urban area were selected, and the species composition
and abundance patterns of spontaneous plants in the diverse
microhabitats were explored. The results showed that 336 species
were recorded, containing rich life forms. The dominant species
with higher frequency and higher abundance accounted for a small
proportion, and most species were with low abundance and low
coverage. The vacant lot on the riverfront and by waterside as
well as natural riverbank harbor the most number of species, while
the hard revetment wall supported more ferns. The abundance of
exotic plants in the riverfront green space and pavement gap were
significantly less, and the spontaneous plants were also quite rich in
the degraded lawn. The abundance of perennial herbs in the lawn
community in summer was significantly higher than that in other
microhabitats. Spontaneous plant resources can be conserved and
utilized according to the pattern of species abundance and coverage
within different habitats, to more effectively improve the ecological
benefits of urban river corridor and provide citizens with more
wilderness experiences. |
| Key words: landscape plant spontaneous plant abundance pattern diversity habitat heterogeneity |
