The fine scale geo-acoustic inversion of the shallow water sub-bottom using chirp signals

2002 ◽  
Author(s):  
W. Seong ◽  
C. Park
Keyword(s):  
Shallow Water ◽  
Fine Scale ◽  
Chirp Signals ◽  
Acoustic Inversion

Geo-acoustic Inversion Using Shallow Water Ambient Noise and Analysis of Uncertainty

2010 ◽  
Author(s):  
Jianheng Lin ◽  
Baoyou Yin ◽  
Xuejuan Yi ◽  
Jeffrey Simmen ◽  
Ellen S. Livingston ◽  
...  
Keyword(s):  
Shallow Water ◽  
Ambient Noise ◽  
Acoustic Inversion

Fine‐scale acoustic imaging of shallow water sediments

1996 ◽  
Vol 100 (4) ◽  
pp. 2712-2712 ◽  
Author(s):  
D. Tang ◽  
D. Chu ◽  
T. Auston
Keyword(s):  
Shallow Water ◽  
Acoustic Imaging ◽  
Fine Scale ◽  
Shallow Water Sediments

Fine-scale acoustic tomographic imaging of shallow water sediments

2001 ◽  
Vol 26 (1) ◽  
pp. 70-83 ◽  
Author(s):  
Dezhang Chu ◽  
Dajun Tang ◽  
T.C. Austin ◽  
A.A. Hinton ◽  
R.I. Arthur
Keyword(s):  
Shallow Water ◽  
Tomographic Imaging ◽  
Fine Scale ◽  
Shallow Water Sediments

Rusty Blackbirds select areas of greater habitat complexity during stopover

The Condor ◽  
2020 ◽  
Author(s):  
James R Wright ◽  
Luke L Powell ◽  
Stephen N Matthews ◽  
Christopher M Tonra
Keyword(s):  
Habitat Selection ◽  
Shallow Water ◽  
Leaf Litter ◽  
Habitat Complexity ◽  
Radio Telemetry ◽  
Fine Scale ◽  
Patch Selection ◽  
Population Declines ◽  
Stopover Site ◽  
Patch Scale

Abstract The Rusty Blackbird (Euphagus carolinus) is a widespread, uncommon migrant that has experienced heavy population declines over the last century. This species can spend over a quarter of their annual cycle on migration, so it is important to determine their habitat requirements during stopover events to inform effective conservation planning. We assessed their habitat selection at an important stopover site in northern Ohio during both fall and spring migration. Since stopover habitat selection is scale-dependent, we investigated both patch-scale (between patches) and fine-scale (within a patch) selection using radio telemetry to locate foraging and roosting flocks, and compared habitat variables between used and available points across the study site. At the patch scale, we found that birds preferred dogwood–willow swamp, low-lying forest patches, and areas of greater habitat complexity for foraging in both seasons. At the fine scale, spring migrants foraged closer to habitat edges than random, and preferred areas with more wet leaf litter and shallow water, and less grass cover. Fall migrants also preferred shallow water and leaf litter cover, and avoided areas with dense grass, forbs, and herbaceous shrub cover. By contrast, birds consistently roosted in dense stands of emergent Phragmites or Typha marsh, suggesting that the best stopover or staging sites are those with a matrix of different wetland habitats. Although the migratory range of Rusty Blackbirds is currently dominated by agricultural development, our results suggest that fragmented landscapes can still provide adequate habitat for migrants if the available land is managed for a variety of wet habitat types.

Simulation of time reversed acoustic inversion in shallow water

2012 ◽  
Vol 131 (4) ◽  
pp. 3488-3488
Author(s):  
Bok Kyoung Choi ◽  
Byoung-Nam Kim ◽  
Bong-Chae Kim ◽  
Seom-Kyu Jung ◽  
Donhyug Kang
Keyword(s):  
Shallow Water ◽  
Acoustic Inversion
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