Abstract

대구 인접지역 삼림식생에 대한 진행천이의 메카니즘과 잠재자연식생을 추정하였다. DCA 에 의한 요인 분석에서는 해발 고도 및 습도구배에 따라 각 군락의 특성이 결정되는 것으로 나타났으며, 토양의 수분 함량과 유기물 함량 및 전질 소량은 군락이 발달함에 따라 높아지는 것으로 나타났다. 종관 연관분석에서는 2개의 종집단으로 크게 구분되었으며, 이들 두 집단의 유형을 결정하는 요인은 기온 및 토양의 수분 요인으로 판단되었다. 특히, 두 종집단은 천이의 진행에 따라 종조성이 달라지는 군락의 발달단계를 보여주는 것으로 보이며, 생활형 조성도 이를 뒷받침하였다. 입지요인 및 종조성에 따라 소나무 군락, 굴참나무군락, 상수리나무군락 및 떡갈나무군락은 졸참나무군락이나 신갈나무군락으로 각각 천이가 진행될 것으로 예측되었다. 본 조사지역의 잠재자연식생은 종조성, 토양환경 및 지형요인에 의하여 산지 중 상부의 신갈나무군락, 계곡부의 고로쇠나무-까치박달군락, 산지 중 하부는 졸참나무군락 의 3개 유형으로 구분되었다. 그리고 신갈나무군락과 고로쇠나무-까치박탈군락은 현존 식생이면서 잠재자연식생이며, 소나무군락은 현재의 종조성 및 해발 영역을 토대로 신갈나무군락과 졸참나무군락으로 각각 발달할 것으로 예측되었다. This study represents the mechanism of progressive succession and potential natural vegetation on the forest vegetation in and surrounding Daegu. As a result of DCA, the feature of community was determined by an altitude and humid gradients. The soil moisture, contents of organic matter and total nitrogen increased as the community developed. In the interspecific association analysis, the forest vegetation was divided into two species groups and they were influenced by temperature and soil moisture. Especially, each two groups showed different stages of vegetation development according to the progressive succession and life form composition supported those results. It was predicted that Quercus variabilis, Q. acutissima, Q. dentata and Pinus densiflora communities would develop into Q. serrata community or Q. mongolica community depending on their location or species composition. In the study area, the potential natural vegetation was divided into 3 communities by biogeographical gradients such as species composition, soil environment, and geographical features: 1)Q. mongolica community in the middle-upper area of the mountain, 2)Q. serrata community in the middle-lower area of the mountain and 3)Carpinus cordata-Acer mono community in the cove area. It is suggested that the Q.mongolica and C.cordata-A.mono communities become actual vegetation and potential natural vegetation. But it is also suggested that the P. densiflora community would be changed into the potential natural vegetation of the Q. mongolica community and Q. serrata community on the basis of the present species composition.

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