文献类型：期刊文献

英文题名：Evaluating the effects of laver cultivation on tidal flat erosion: Toward sustainable environmental practices

作者：Chen, Dezhi[1,2];Li, Gaocong[3];Tang, Jieping[3];Zhao, Lintao[1,2];Wang, Ya Ping[4,5];Gao, Chao[4]

机构：[1]Minist Nat Resources, Inst Oceanog 4, Key Lab Trop Marine Ecosyst & Bioresource, Beihai 536000, Peoples R China;[2]Minist Nat Resources, Inst Oceanog 4, Guangxi Key Lab Beibu Gulf Marine Resources Enviro, Beihai 536000, Peoples R China;[3]Guangdong Ocean Univ, Sch Elect & Informat Engn, Zhanjiang 524000, Peoples R China;[4]Nanjing Univ, Sch Geog & Ocean Sci, Nanjing 210093, Peoples R China;[5]East China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200241, Peoples R China

年份：2024

卷号：366

外文期刊名：JOURNAL OF ENVIRONMENTAL MANAGEMENT

收录：SCI-EXPANDED(收录号：WOS:001271710300001)、、EI(收录号：20242916703534)、Scopus(收录号：2-s2.0-85198252946)、WOS

基金：This study was supported by several grants and foundations, including the National Natural Science Foundation of China (Grant No. 42306189) , the Youth Foundation of Guangxi Zhuang Autonomous Region (China) (Grant No. 2022GXNSFBA035566) , the Doctoral Scientific Research Foundation of the Fourth Institute of Oceanography (Grant No. 202108) , the Innovation Driven Development Foundation of Guangxi (Grant No. AD22080035) , the Special Fund for the Ministry of Natural Resources (China) (Grant Nos. CB202302006, CB202402015) , and the Program for Key Laboratory of Tropical Marine Ecosystem and Bioresource, Ministry of Natural Resources (China) (2021QN02) . Additional support was provided by the fellowship from the China Postdoctoral Science Foundation (China) (Grant No. 2023M741620) and the Postdoctoral Fellowship Program of CPSF (Grant No. GZC20231100) . We extend our gratitude to Wu H, Pan YP, Lan TF, and Lu T for their invaluable assistance in fieldwork and laboratory measurements.

语种：英文

外文关键词：Laver cultivation; Sediment transport; Tidal flat erosion; Morphological equilibrium; Sustainable farming practices

外文摘要：The rapid expansion of laver (Porphyra yezoensis) cultivation on lower tidal flats has become integral to the local economy, yet it also raises concerns regarding its potential impact on the morphological evolution due to increasing human activities. This study utilizes integrated near-bed field measurements to assess morphological dynamics and quantify sediment erosion processes, highlighting the significant impact of laver harvest on tidal flat stability. Our results show that erosion and bed coarsening in the cultivated areas experienced a notable intensification immediately after harvest, with net erosion in cultivated areas reaching approximately -38.2 mm during the first tide post-harvest, markedly higher-more than an order of magnitude-compared to adjacent uncultivated areas. The erosion rate notably spiked with the average bed level change rate increasing to -13.8 x 10-4 mm/s, compared to a rate of +0.3 x 10-4 mm/s during the unharvest period. Subsequently, the cultivated areas entered a recovery phase with a deposition amount of +12.5 mm, while the net cumulative erosion thickness throughout the entire observation period was -25.2 mm. The cultivation method, characterized by consistent harvests every 10 days, means that even minor erosion from continuous harvests can escalate into significant degradation. This study suggests that long-term cultivation cycle practices may result in irreversible changes to the depositional environment, potentially jeopardizing the habitat viability and ecological function. Sustainable agricultural strategies, including site selection, infrastructure planning, monitoring environmental changes, ecological assessments and sustainable practices, are recommended to mitigate the negative impacts of cultivation on regional stability and preserve the coastal ecological balance.