A multi-year study of acoustic propagation and ambient sound in a Thalassia testudinum seagrass meadow in a shallow sub-tropical lagoona).

IF 2.1 2区 物理与天体物理 Q2 ACOUSTICS Journal of the Acoustical Society of America Pub Date : 2024-11-01 DOI:10.1121/10.0034243
Megan S Ballard, Kevin M Lee, Kyle A Capistrant-Fossa, Andrew R McNeese, Colby W Cushing, Thomas S Jerome, Robert T Taylor, Kenneth H Dunton, Preston S Wilson
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Abstract

Seagrasses provide a multitude of ecosystem services and act as important carbon sinks. However, seagrass habitats are declining globally, and they are among the most threatened ecosystems on earth. For these reasons, long-term and continuous measurements of seagrass parameters are of primary importance for ecosystem health assessment and sustainable management. This paper presents results from both active and passive acoustical methods for ecosystem monitoring in seagrass meadows. From a propagation perspective, gas bodies contained within the seagrass tissue as well as photosynthetic-driven bubble production result in attenuation, dispersion, and scattering of sound that produce increased transmission loss. For the passive approach, the detachment of gas bubbles from the plants is an important component of the ambient soundscape. Examples of both techniques will be presented based on data collected as part of a two-year continuous deployment of an acoustical measurement system operating in a moderately dense seagrass bed dominated by Thalassia testudinum (turtle grass) in Corpus Christi Bay, Texas. The data show annual trends related to the seasonal growth pattern of Thalassia as well as diurnal trends correlated with photosynthetically active radiation.

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对亚热带浅海泻湖中海草(Thalassia testudinum seagrass meadow)的声波传播和环境声的多年研究)。
海草提供多种生态系统服务,是重要的碳汇。然而,海草栖息地在全球范围内不断减少,是地球上最受威胁的生态系统之一。因此,长期、连续地测量海草参数对生态系统健康评估和可持续管理至关重要。本文介绍了用主动和被动声学方法监测海草草甸生态系统的结果。从传播角度来看,海草组织内的气体体以及光合作用驱动的气泡产生会导致声音的衰减、分散和散射,从而增加传播损失。对于被动方法,气泡脱离植物是环境声景的重要组成部分。我们将根据在得克萨斯州科珀斯克里斯蒂湾以海龟草(Thalassia testudinum)为主的中等密度海草床连续部署两年的声学测量系统所收集的数据,介绍这两种技术的实例。数据显示了与海草季节性生长模式相关的年度趋势,以及与光合有效辐射相关的昼夜趋势。
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来源期刊
CiteScore
4.60
自引率
16.70%
发文量
1433
审稿时长
4.7 months
期刊介绍: Since 1929 The Journal of the Acoustical Society of America has been the leading source of theoretical and experimental research results in the broad interdisciplinary study of sound. Subject coverage includes: linear and nonlinear acoustics; aeroacoustics, underwater sound and acoustical oceanography; ultrasonics and quantum acoustics; architectural and structural acoustics and vibration; speech, music and noise; psychology and physiology of hearing; engineering acoustics, transduction; bioacoustics, animal bioacoustics.
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