Nizamani Mir Muhammad, Harris A J, Cheng Xia-Lan, Zhu Zhi-Xin, Jim Chi Yung, Wang Hua-Feng
Key Laboratory of Tropical Biological Resources of Ministry of Education College of Tropical Crops Hainan University Haikou China.
Key Laboratory of Plant Resources Conservation and Sustainable Utilization South China Botanical Garden Chinese Academy of Science Guangzhou China.
Ecol Evol. 2021 Aug 5;11(17):12204-12219. doi: 10.1002/ece3.7985. eCollection 2021 Sep.
Within urban green spaces, tree species diversity is believed to correlate with aboveground biomass, though there is some disagreement within the literature on the strength and directionality of the relationship. Therefore, we assessed the relationship between the biodiversity of woody species and the aboveground biomass of woody plant species in the tropical, coastal city of Haikou in southern China. To accomplish this, we obtained comprehensive tree and site data through field sampling of 190 urban functional units (UFUs, or work units) corresponding to six types of land uses governmental-institutional, industrial-commercial, park-recreational, residential, transport infrastructure, and undeveloped area. Based on our field data, we investigated the relationship between tree species diversity and aboveground biomass using multiple regression, which revealed significant relationships across all five types of land uses. Aboveground biomass in green spaces was also correlated with anthropogenic factors, especially time since urban development, or site age, annual maintenance frequency by human caretakers, and human population density. Among these factors, maintenance is the strongest predictor of aboveground biomass in urban green space. Therefore, this study highlights the critical role of maintenance of urban green space in promoting both aboveground biomass and woody biodiversity in urban ecosystems and, consequently, on urban ecosystem services. Our findings contribute to a deeper understanding of the ecosystem services provided by communities of woody plant species in urban areas.
在城市绿地中，树木物种多样性被认为与地上生物量相关，尽管文献中对于这种关系的强度和方向性存在一些分歧。因此，我们评估了中国南方热带沿海城市海口木本植物物种的生物多样性与地上生物量之间的关系。为实现这一目标，我们通过对190个城市功能单元（UFUs，即工作单元）进行实地采样，获取了全面的树木和场地数据，这些功能单元对应六种土地利用类型：政府机构用地、工商业用地、公园休闲用地、住宅用地、交通基础设施用地和未开发区域。基于我们的实地数据，我们使用多元回归研究了树种多样性与地上生物量之间的关系，结果表明在所有五种土地利用类型中均存在显著关系。绿地中的地上生物量还与人为因素相关，特别是城市发展后的时间（即场地年龄）、人类养护人员的年度维护频率以及人口密度。在这些因素中，维护是城市绿地地上生物量最强的预测指标。因此，本研究强调了城市绿地维护在促进城市生态系统中的地上生物量和木本生物多样性，进而促进城市生态系统服务方面的关键作用。我们的研究结果有助于更深入地理解城市地区木本植物群落提供的生态系统服务。
