文献类型：期刊文献

英文题名：Coupled patterns of natural and anthropogenic resources in typical ecosystems in coastal areas of China

作者：Zhai, Xiajie[1,2,3] Liu, Chenxi[1,2] Cui, Lijuan[1,2,3] Li, Wei[1,2,3] Zhao, Xinsheng[1,2,3] Wang, Jinzhi[1,2,3] Lei, Yinru[1,2,3] Li, Jing[1,2,3]

第一作者：Zhai, Xiajie

通信作者：Cui, LJ[1]

机构：[1]Chinese Acad Forestry, Inst Ecol Conservat & Restorat, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Beijing Key Lab Wetland Serv & Restorat, Inst Wetland Res, Beijing 100091, Peoples R China;[3]Beijing Hanshiqiao Natl Wetland Ecosyst Res Stn, Beijing 101399, Peoples R China

年份：2023

卷号：239

外文期刊名：ENVIRONMENTAL RESEARCH

收录：;EI(收录号：20234214922484);Scopus(收录号：2-s2.0-85174332772);WOS:【SCI-EXPANDED(收录号:WOS:001097937700001)】；

基金：This research was supported by the Project of National Natural Sci- ence Foundation of China (No. 42101308) . The authors are very grateful to local farmers for their patience and support of our work, and we thank the wife of the first author, Dr. Jian-Hua Wang of Changping Laboratory (CPL) , for her suggestions on the manuscript.

语种：英文

外文关键词：Coastal ecosystems; Emergy analysis; Natural and anthropogenic inputs; Renewable resources; Sustainability

摘要：The coastal area of Yancheng, China, is one of the hotspots for ecological research. Under the coupling of human and natural ecosystems, the region has gradually evolved into a coexistence of aquatic, agricultural and mudflat ecosystems. What are the patterns of natural and artificial resource inputs and patterns of change in ecosystems? How can ecological flows be analyzed at a uniform scale? Here, we selected six typical local ecosystems, namely, rice-wheat for enterprises (RWE), rice-wheat for smallholder households (RWS), chrysanthemum-wheat (CW), fish polyculture (FP), juvenile crab farming (JF) and clam polyculture (CP), and analyzed their energy flow flux and sustainability based on emergy theory. The results showed that anthropogenic resource inputs were higher than natural resource inputs in all ecosystems, and the inputs of aquatic ecosystems were greater than those of agroecosystems. The greatest total input was 2.0 E+17 seJ/ha/yr for FP, and the lowest was 1.9 E+16 seJ/ha/yr for RWE. The proportions of renewable and artificial inputs for RWE, RWS, CW, FP, JF and CP were 32.8% vs. 96.1%, 40.3% vs. 96.5%, 34.7% vs. 97.0%, 32.6% vs. 99.4%, 55.1% vs. 98.5%, and 62.5% vs. 98.6%, respec-tively. The highest input to agroecosystems was nitrogen fertilizer, while in JF and CP, it was water, and feed (63.3%) accounted for the highest percentage of input in FP. JF and CP had lower environmental loads and higher sustainability than other ecosystems, but this still represents a high input compared to agroecosystems. Human-led resource coupling profoundly affects ecosystem sustainability, and various thresholds of energy use and ecological sustainability need to be studied in depth. Continuous exploration of methods and mechanisms for the maintenance and evolution of ecosystems with low total inputs and low inputs of non-renewable resources can contribute to high-quality sustainable development of an area or region.