The present application belongs to the technical field of
ecological environment protection, and particularly relates to a quantitative
reconstruction method of interspecific relationship of biological
community, comprising the following steps: S1, lake biological-environment
database arrangement; collecting and arranging the lake biological-environment
database of the region, establishing the regional biological
database of all specific biological groups appearing in the surface sample of the lake, and standardizing the data of the
water environment physicochemical indexes corresponding to each lake after summarizing to form the regional environment database; S2, collection of lake drilling data; using a Kajak gravity sampler to extract the
sediment drilling at the central position of the lake and to divide the sample, the sample is placed in a self-sealing bag, transported in
cold storage, and stored in a room at -20 DEG C for physicochemical index analysis and
biological species identification. The niche breadth and overlap of the internal species of the biological
community are calculated, the coexistence relationship between the species in the lake is quantified, and a dynamic evaluation tool of the interspecific relationship is provided.