Abstract Biodiversity has brought rich material products and non-material benefits to mankind, and is an important support for the sustainable development of human society. Although people realize the importance of improving biodiversity under the pressure of rapid disappearance of biodiversity, few people have fully explored the parametric design of biodiversity in urban landscapes. Therefore, this article briefly describes the development process of urban landscape biodiversity, taking examples of different types and different scales at home and abroad as examples, comparing its parameterized evaluation and design models, and analyzing the parametric design in the urban landscape and the biodiversity target organic ways and means of combination. On this basis, the approach of urban landscape design for biodiversity is explored, its development trend and main problems are prospected, and the corresponding enlightenment for the future development of urban biodiversity and practical reference are provided.

Abstract Taking the urban plants of Yiyang as the research object, the field investigation of Yiyang plants was carried out by using the method of combining route investigation and quadrat investigation, the current situation of plant diversity level in Yiyang City was analyzed, and the planning content and construction strategy of plant diversity protection in Yiyang City were studied, in order to provide reference for the effective protection of plant diversity in Yiyang City. The results showed that there were 145 families, 481 genera and 955 species of vascular plants in Yiyang urban planning area; there are 232 species of garden plant resources in the central urban area, belonging to 62 families. 105 genera; the overall level of plant diversity in Yiyang City is general. Urban landscaping relies too much on exotic species, and the utilization rate of native plants in urban gardens is low.

Abstract The integrated green development of the Yangtze River Delta is a long-term major strategy. The rural ecological status is the basis for the healthy development of the Yangtze River Delta urban agglomeration. This study focuses on the expansion of demand for rural vegetation biodiversity conservation and ecosystem service functions in the Yangtze River Delta urban agglomeration. A total of 256 plant communities in 28 villages were investigated, and the composition of family, genera and species and life forms were analyzed respectively; through clustering, 47 community types and 8 vegetation types were divided, and the composition and distribution characteristics of plant community were analyzed; and then it analyzed the species biodiversity and compared the characteristics of rural transformation in the Yangtze River Delta with the vegetation characteristics of urban areas and natural areas. Finally, specific countermeasures for biodiversity conservation and reconstruction of the Yangtze River Delta rural vegetation was proposed in terms of species protection, habitat maintenance, plant community conservation, and ecological aesthetics guidance.

Abstract The present study evaluated the effect of silvicultural treatments on the diversity and structure of species in temperate forest ecosystems in the Municipality of Pueblo Nuevo in the State of Durango, Mexico; it was carried out to know if forest use modifies the diversity, mixture of species, spatial distribution, and dimensional differentiation of individuals in these ecosystems. The evaluation was carried out by comparing 10 plots with management history, which were measured before the application of the treatment and five years later. The diversity indices of Shannon, Simpson and Margalef were compared, as well as indices of structure of mixture of species, spatial distribution, and dimensional differentiation. According to the silvicultural treatments applied, the values of the indices do not present significant differences in their evaluations (p> 0.05), which indicates that forest use does not modify the diversity and structure of species of the tree stratum of this plant community.