In this study, the change in green space in different scenarios and the index characteristics of landscape patterns were analyzed and were conducive to providing the decision basis for future green space planning in Harbin, a city in Northeast China. The FLUS model was used to predict the layout of green space, and the prediction results were analyzed and evaluated using the landscape index method. Combined with the MOP model and LINGO12.0, the objective function of economic benefit and ecological benefit was established to maximize the comprehensive benefit. As revealed by the outcome, from 2010 to 2020, the fragmentation degree of cultivated land, forest, and grassland decreased, and the overall landscape level tended to be diversified and uniform. In the status quo scenario, the cultivated land and the forest land were increased, whereas the water area and the wetland changed little, and its overall benefit was the lowest. The forest was increased by 137.46 km² in the ecological protection scenario, the largest among the three scenarios, and the overall water quality improved. In the economic development scenario, the cultivated land tended to expand rapidly, the connectivity was increased, and the area of forest was decreased by 69.19 km², and its comprehensive benefit is lower than that under the scenario of ecological protection. The sustainable development scenario achieved the most significant economic and ecological benefits, with a total income of CNY 435,860.88 million. Therefore, the future green space pattern should limit the expansion of cultivated land, maintain the spatial pattern of woodland and wetland, and enhance the protection of water area. In this study, Harbin green space was studied from different scenario perspectives, combined with landscape pattern index and multi-objective planning, which is of great significance for Harbin green space planning decisions in the future and improving comprehensive benefits.

Taxus, a relic plant genus from the Tertiary period, contains taxane compounds that are crucial in anti-cancer drug development and have significant medicinal and ecological value. Evaluation of the potential distribution range and shifts for this genus considering global climate change is vital for conserving wild resources, supporting artificial propagation, and ensuring sustainable development. We analyzed the potential geographic distribution patterns and key environmental factors affecting four Taxus species (Taxus cuspidata, Taxus wallichiana var. mairei, Taxus wallichiana, and Taxus wallichiana var. chinensis) under current climate conditions and four shared socioeconomic pathways (SSP126, SSP245, SSP370, and SSP585) across three future periods (2050s, 2070s, and 2090s) using the regularization multiplier and feature combination parameters of the MaxEnt model. We also explored their responses to climate change over time. The area under the curve of models built using the ENMeval package exceeded 0.9, demonstrating high accuracy. Environmental analysis indicated that the coldest monthly minimum temperature was the main environmental factor influencing the species distribution, except in Taxus cuspidata, for which the human footprint was the primary factor. Currently, the habitats of the four Taxus species exhibit spatial variation, with Taxus wallichiana var. chinensis having the largest suitable area in China, covering approximately 200.89 × 10⁴ km², accounting for 21.17% of China’s land area. Habitat trends varied under future climate scenarios, with the suitable area expanding for Taxus wallichiana and Taxus wallichiana var. chinensis, and showing expansion and contraction for Taxus wallichiana var. mairei and Taxus cuspidata. The distribution centroids were predicted to shift to higher latitudes over time, with Taxus wallichiana var. chinensis showing particularly clear migration trends. These results offer a vital reference for developing conservation strategies and introduction and cultivation initiatives for these Taxus species.