title: [Calculation on ecological security baseline based on the ecosystem services value and the food security].
abstract: The rapid development of coastal economy in Hebei Province caused rapid transition of coastal land use structure, which has threatened land ecological security. Therefore, calculating ecosystem service value of land use and exploring ecological security baseline can provide the basis for regional ecological protection and rehabilitation. Taking Huanghua, a city in the southeast of Hebei Province, as an example, this study explored the joint point, joint path and joint method between ecological security and food security, and then calculated the ecological security baseline of Huanghua City based on the ecosystem service value and the food safety standard. The results showed that ecosystem service value of per unit area from maximum to minimum were in this order: wetland, water, garden, cultivated land, meadow, other land, salt pans, saline and alkaline land, constructive land. The order of contribution rates of each ecological function value from high to low was nutrient recycling, water conservation, entertainment and culture, material production, biodiversity maintenance, gas regulation, climate regulation and environmental purification. The security baseline of grain production was 0.21 kg · m⁻², the security baseline of grain output value was 0.41 yuan · m⁻², the baseline of ecosystem service value was 21.58 yuan · m⁻², and the total of ecosystem service value in the research area was 4.244 billion yuan. In 2081 the ecological security will reach the bottom line and the ecological system, in which human is the subject, will be on the verge of collapse. According to the ecological security status, Huanghua can be divided into 4 zones, i.e., ecological core protection zone, ecological buffer zone, ecological restoration zone and human activity core zone.
authors.forename: Ling
authors.initials: L
authors.lastname: He
authors.forename: Qi-jian
authors.initials: QJ
authors.lastname: Jia
authors.forename: Chao
authors.initials: C
authors.lastname: Li
authors.forename: Hao
authors.initials: H
authors.lastname: Xu
mesh_terms: D044822:Biodiversity; D002681:China; D002947:Cities; D002980:Climate; D003247:Conservation of Natural Resources; D004463:Ecology / Q000191:economics*; D017753:Ecosystem; D005523:Food Supply; D065948:Grassland; D053833:Wetlands