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Assessing the Underwater Acoustics of the World's Largest Vibration Hammer (OCTA-KONG) and Its Potential Effects on the Indo-Pacific Humpbacked Dolphin (Sousa chinensis)
Wang, Zhitao1,2; Wu, Yuping3; Duan, Guoqin4; Cao, Hanjiang4; Liu, Jianchang5; Wang, Kexiong1; Wang, Ding1
2014-10-22
Source PublicationPLOS ONE
ISSN1932-6203
Volume9Issue:10
AbstractAnthropogenic noise in aquatic environments is a worldwide concern due to its potential adverse effects on the environment and aquatic life. The Hongkong-Zhuhai-Macao Bridge is currently under construction in the Pearl River Estuary, a hot spot for the Indo-Pacific humpbacked dolphin (Sousa chinensis) in China. The OCTA-KONG, the world's largest vibration hammer, is being used during this construction project to drive or extract steel shell piles 22 m in diameter. This activity poses a substantial threat to marine mammals, and an environmental assessment is critically needed. The underwater acoustic properties of the OCTA-KONG were analyzed, and the potential impacts of the underwater acoustic energy on Sousa, including auditory masking and physiological impacts, were assessed. The fundamental frequency of the OCTA-KONG vibration ranged from 15 Hz to 16 Hz, and the noise increments were below 20 kHz, with a dominant frequency and energy below 10 kHz. The resulting sounds are most likely detectable by Sousa over distances of up to 3.5 km from the source. Although Sousa clicks do not appear to be adversely affected, Sousa whistles are susceptible to auditory masking, which may negatively impact this species' social life. Therefore, a safety zone with a radius of 500 m is proposed. Although the zero-to-peak source level (SL) of the OCTA-KONG was lower than the physiological damage level, the maximum root-mean-square SL exceeded the cetacean safety exposure level on several occasions. Moreover, the majority of the unweighted cumulative source sound exposure levels (SSELs) and the cetacean auditory weighted cumulative SSELs exceeded the acoustic threshold levels for the onset of temporary threshold shift, a type of potentially recoverable auditory damage resulting from prolonged sound exposure. These findings may aid in the identification and design of appropriate mitigation methods, such as the use of air bubble curtains, "soft start" and "power down" techniques.
SubtypeArticle
KeywordBottle-nosed Dolphins Whales Orcinus-orca Tursiops-truncatus Marine Mammals River Estuary Vessel Noise Hearing-loss Pure-tones Sound Sea
DOI10.1371/journal.pone.0110590
WOS HeadingsScience & Technology
Indexed BySCI
Language英语
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS KeywordBOTTLE-NOSED DOLPHINS ; WHALES ORCINUS-ORCA ; TURSIOPS-TRUNCATUS ; MARINE MAMMALS ; RIVER ESTUARY ; VESSEL NOISE ; HEARING-LOSS ; PURE-TONES ; SOUND ; SEA
WOS IDWOS:000343674800061
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/20280
Collection水生生物多样性与资源保护研究中心
Affiliation1.Chinese Acad Sci, Key Lab Aquat Biodivers & Conservat, Inst Hydrobiol, Wuhan, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Sun Yat Sen Univ, Sch Marine Sci, Guangzhou 510275, Guangdong, Peoples R China
4.Hongkong Zhuhai Macao Bridge Author, Guangzhou, Guangdong, Peoples R China
5.Minist Transport, Transport Planning & Res Inst, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Wang, Zhitao,Wu, Yuping,Duan, Guoqin,et al. Assessing the Underwater Acoustics of the World's Largest Vibration Hammer (OCTA-KONG) and Its Potential Effects on the Indo-Pacific Humpbacked Dolphin (Sousa chinensis)[J]. PLOS ONE,2014,9(10).
APA Wang, Zhitao.,Wu, Yuping.,Duan, Guoqin.,Cao, Hanjiang.,Liu, Jianchang.,...&Wang, Ding.(2014).Assessing the Underwater Acoustics of the World's Largest Vibration Hammer (OCTA-KONG) and Its Potential Effects on the Indo-Pacific Humpbacked Dolphin (Sousa chinensis).PLOS ONE,9(10).
MLA Wang, Zhitao,et al."Assessing the Underwater Acoustics of the World's Largest Vibration Hammer (OCTA-KONG) and Its Potential Effects on the Indo-Pacific Humpbacked Dolphin (Sousa chinensis)".PLOS ONE 9.10(2014).
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