Korean Journal of Environment and Ecology (한국환경생태학회지)

Korean Society of Environment and Ecology (한국환경생태학회)
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Changes in Leaf and Reproductive Traits of Mountain Ash (Sorbus alnifolia) as Urban Flourisher in the Seoul Metropolitan, South Korea

한국 서울 식생의 번성자로서 팥배나무의 형질 변화 양상

  • Jung, Song-Hie (Gardens and Education Research Division, Korea National Arboretum) ;
  • Cho, Yong-Chan (Gwangneung Forest Conservation Center, Korea National Arboretum) ;
  • Lee, Chang-Seok (Division of Chemistry and Bio-Environmental Sciences, Seoul Women's Univ.)
  • 정성희 (국립수목원 전시교육연구과) ;
  • 조용찬 (국립수목원 광릉숲보전센터) ;
  • 이창석 (서울여자대학교 화학생명환경과학부)
  • Received : 2021.11.13
  • Accepted : 2021.12.06
  • Published : 2021.12.31
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Abstract

Understanding the functional traits of dominant species in urban ecosystems provides insight into species' trait adaptation and ecosystem function in response to fragmented and isolated urban vegetation and reduced biological interactions. This study compared means and variances of environmental factors (geographic, meteorological, and soil attributes) and 4 leaf traits (leaf area, specific leaf area, leaf dry mass content, and leaf shape index) and 7 reproductive traits (fruit width, fruit length, fruit shape, fruit dry weight, fruit dry matter content, seed weight, and seed ratio) measured of 40 Sorbus alnifolia individuals in four mountainous areas south of Seoul downtown, South Korea. We then performed the multivariate analysis of trait combinations. While the measured environmental factors indicated the individuality of the survey sites, the urban vegetation was drier and had a longer growth period. The leaves of S. alnifolia in the urban areas were smaller and heavier, and the fruits produced longer and lighter seeds, showing the traits affected by long urbanization. The study confirmed changes in the growth and reproduction mechanism of the S. alnifolia population under the urban environment, indicating reduced biological interaction due to vegetation fragmentation and isolation. This study provides limited but distinct ecological information about the function and persistence of key species in cities with a reduced scale of biological interactions and many negative environmental factors such as air pollution.

도시 생태계에서 우점 수종의 형질 특성은 분획화 및 고립된 식생, 그리고 생물상호작용 감소 등 환경 변화에 대한 종의 형질 적응과 생태계 기능에 대한 통찰력을 제공한다. 우리는 한국의 서울 중심에서 남쪽 방향의 4개 산지에서 환경 요인 (지리, 기상 및 토양 속성)을 포함하여 모두 40개체 팥배나무 (Sorbus alnifolia)에서 측정한 4개 유형의 잎 형질 (Leaf area, Specific leaf area, Leaf dry mass content, Leaf shape index)과 7개 유형의 번식 형질 (Fruit width, Fruit length, Fruit shape, Fruit dry weight, Fruit dry matter content, Seed weight 및 Seed ratio)의 평균과 분산 양상, 그리고 형질 조합에 대한 다변량 분석을 실시하였다. 측정된 환경 요인은 조사 장소의 개별성을 나타내었지만, 도심 식생이 더 건조하고 생장도일이 길었다. 도심에서 팥배나무의 잎은 작고 무거워지며, 열매는 길쭉하고 가벼운 종자를 생산하여, 오랜 도시화 영향에 따른 형질 반응들이 관찰되었다. 우리의 연구는 식생 파편화 및 고립화에 따른 생물 상호작용 감소를 나타내는 도심 환경에서 팥배나무 집단의 성장 및 번식 기제의 변화를 확인하였다. 우리는 축소된 생물 상호작용 규모, 그리고 대기 오염 같은 부정적 환경 요인이 많은 도시에서 핵심 수종의 기능과 지속성에 관해 제한적이지만 뚜렷한 생태 정보를 제공한다.

Keywords

Acknowledgement

이 논문은 국립수목원 연구사업(KNA1-2-32, 18-3; KNA1-2-26, 16-4) 및 서울여자대학교 교내연구비에 의하여 연구되었음.

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