{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,15]],"date-time":"2026-01-15T22:40:56Z","timestamp":1768516856932,"version":"3.49.0"},"reference-count":63,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2021,2,25]],"date-time":"2021-02-25T00:00:00Z","timestamp":1614211200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["41606192\/41176140"],"award-info":[{"award-number":["41606192\/41176140"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Seagrass meadows play critical roles in supporting a high level of biodiversity but are continuously threatened by human activities, such as sea reclamation. In this study, we reported on a large seagrass (Zostera marina L.) meadow in Caofeidian shoal harbor in the Bohai Sea of northern China. We evaluated the environmental impact of sea reclamation activities using Landsat imagery (1974\u20132019) by mapping seagrass meadow distribution changes. ISODATA was adopted for the unsupervised classification and mapping of seagrass beds. The error matrix developed using the in situ data obtained from acoustic surveys for Landsat 8OLI image classification was 87.20% accurate. The maps showed rapidly increasing changes in seagrass meadows as the amount of reclaimed land increased. Some seagrass meadows experienced large-scale changes, and sea reclamation has been suggested as the main factor responsible for habitat loss, which results from physical damage, excessive sedimentation, and increased turbidity caused by reclamation. In addition, habitat degradation may have resulted from three storm surges induced by typhoons in 1992\u20131998. Fortunately, land reclamation, forming an artificial \u201clongshore bar\u201d, buffers seagrass meadows from wave actions, providing relatively sheltered conditions, which has allowed a large habitat increase since 2012. These were the largest eelgrass meadows (3,217.32 ha), with a peripheral area of ~100 km2, in the Bohai Sea of northern China in 2019. However, the existing largest eelgrass beds in China are threatened by trawling, clam harvesting (especially clam sucking), channel dredging, and culture pond construction. Our work will help coastal managers monitor the environmental impacts of reclamation activities on seagrass meadows on a large spatio-temporal scale and will also provide information for seagrass restoration using artificial \u201clongshore bars\u201d.<\/jats:p>","DOI":"10.3390\/rs13050856","type":"journal-article","created":{"date-parts":[[2021,2,26]],"date-time":"2021-02-26T04:36:24Z","timestamp":1614314184000},"page":"856","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":30,"title":["Long-Term Changes in the Unique and Largest Seagrass Meadows in the Bohai Sea (China) Using Satellite (1974\u20132019) and Sonar Data: Implication for Conservation and Restoration"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3750-5750","authenticated-orcid":false,"given":"Shaochun","family":"Xu","sequence":"first","affiliation":[{"name":"CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China"},{"name":"Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"CAS Engineering Laboratory for Marine Ranching, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"University of Chinese Academy of Sciences, Beijing 100049, China"}]},{"given":"Shuai","family":"Xu","sequence":"additional","affiliation":[{"name":"CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China"},{"name":"Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"CAS Engineering Laboratory for Marine Ranching, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"University of Chinese Academy of Sciences, Beijing 100049, China"}]},{"given":"Yi","family":"Zhou","sequence":"additional","affiliation":[{"name":"CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China"},{"name":"Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"CAS Engineering Laboratory for Marine Ranching, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"University of Chinese Academy of Sciences, Beijing 100049, China"}]},{"given":"Shidong","family":"Yue","sequence":"additional","affiliation":[{"name":"CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China"},{"name":"Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"CAS Engineering Laboratory for Marine Ranching, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"University of Chinese Academy of Sciences, Beijing 100049, China"}]},{"given":"Xiaomei","family":"Zhang","sequence":"additional","affiliation":[{"name":"CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China"},{"name":"Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"CAS Engineering Laboratory for Marine Ranching, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China"}]},{"given":"Ruiting","family":"Gu","sequence":"additional","affiliation":[{"name":"CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China"},{"name":"Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"CAS Engineering Laboratory for Marine Ranching, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"University of Chinese Academy of Sciences, Beijing 100049, China"}]},{"given":"Yu","family":"Zhang","sequence":"additional","affiliation":[{"name":"CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China"},{"name":"Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"CAS Engineering Laboratory for Marine Ranching, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"University of Chinese Academy of Sciences, Beijing 100049, China"}]},{"given":"Yongliang","family":"Qiao","sequence":"additional","affiliation":[{"name":"Qingdao University of Science and Technology, Qingdao 266000, China"}]},{"given":"Mingjie","family":"Liu","sequence":"additional","affiliation":[{"name":"CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China"},{"name":"Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"CAS Engineering Laboratory for Marine Ranching, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"University of Chinese Academy of Sciences, Beijing 100049, China"}]}],"member":"1968","published-online":{"date-parts":[[2021,2,25]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"253","DOI":"10.1038\/387253a0","article-title":"The value of the world\u2019s ecosystem services and natural capital","volume":"387","author":"Costanza","year":"1997","journal-title":"Nature"},{"key":"ref_2","first-page":"269","article-title":"The importance of seagrass beds as a habitat for fishery species","volume":"39","author":"Jackson","year":"2001","journal-title":"Oceanogr. 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