Lee Kevin M, Ballard Megan S, McNeese Andrew R, Wilson Preston S
Applied Research Laboratories, The University of Texas at Austin, P.O. Box 8029, Austin, Texas 78713-8029, USA
J Acoust Soc Am. 2017 Apr;141(4):EL402. doi: 10.1121/1.4979302.
In situ measurements of sound speed and attenuation at 50 kHz were conducted in a Thalassia testudium meadow. Measurements were obtained at discrete depths in the water column, in the seagrass canopy, and in the sediment beneath the seagrass. Measurements were also obtained in bare sediment located a few meters away. Sediment biomass abundance was measured from cores collected at each site. Even though the measurements were obtained in the dormant season (winter), significant differences in sound speed and attenuation were observed in the sediment beneath the seagrass bed compared to the bare sediment.
在泰来草草甸中对50千赫的声速和衰减进行了原位测量。在水柱中的离散深度、海草草冠层以及海草下方的沉积物中进行了测量。还在几米外的裸露沉积物中进行了测量。从每个地点采集的岩芯中测量了沉积物生物量丰度。尽管测量是在休眠季节（冬季）进行的，但与裸露沉积物相比，在海草床下方的沉积物中观察到了声速和衰减的显著差异。
