scholarly journals Delineation of landform and lithologic units for Ecological Landtype-Association analysis in Glacier Bay National Park, Southeast Alaska

2008 ◽  
Author(s):  
David A. Brew
Keyword(s):  
Association Analysis ◽  
National Park ◽  
Southeast Alaska ◽  
Glacier Bay ◽  
Glacier Bay National Park

scholarly journals The Neoglacial landscape and human history of Glacier Bay, Glacier Bay National Park and Preserve, southeast Alaska, USA

The Holocene ◽  
2009 ◽  
Vol 19 (3) ◽  
pp. 381-393 ◽  
Author(s):  
Cathy Connor ◽  
Greg Streveler ◽  
Austin Post ◽  
Daniel Monteith ◽  
Wayne Howell
Keyword(s):  
National Park ◽  
Human History ◽  
Southeast Alaska ◽  
Glacier Bay ◽  
Glacier Bay National Park ◽  
History Of

scholarly journals Acoustically advertising male harbour seals in southeast Alaska do not make biologically relevant acoustic adjustments in the presence of vessel noise

2020 ◽  
Vol 16 (4) ◽  
pp. 20190795
Author(s):  
Leanna P. Matthews ◽  
Michelle E. H. Fournet ◽  
Christine Gabriele ◽  
Holger Klinck ◽  
Susan E. Parks
Keyword(s):  
Noise Signal ◽  
Sound Level ◽  
Southeast Alaska ◽  
Acoustic Environment ◽  
Biologically Relevant ◽  
Glacier Bay ◽  
Harbour Seals ◽  
Glacier Bay National Park ◽  
Communication Space ◽  
Vessel Noise

Aquatically breeding harbour seal ( Phoca vitulina ) males use underwater vocalizations during the breeding season to establish underwater territories, defend territories against intruder males, and possibly to attract females. Vessel noise overlaps in frequency with these vocalizations and could negatively impact breeding success by limiting communication space. In this study, we investigated whether harbour seals employed anti-masking strategies to maintain communication in the presence of vessel noise in Glacier Bay National Park and Preserve, Alaska. Harbour seals in this location did not sufficiently adjust source levels or acoustic parameters of vocalizations to compensate for acoustic masking. Instead, for every 1 dB increase in ambient noise, signal excess decreased by 0.84 dB, indicating a reduction in communication space when vessels passed. We suggest that harbour seals may already be acoustically advertising at or near a biologically maximal sound level and therefore lack the ability to increase call amplitude to adjust to changes in their acoustic environment. This may have significant implications for this aquatically breeding pinniped, particularly for populations in high noise regions.

Interactions between instream wood and hydrogeomorphic development within recently deglaciated streams in Glacier Bay National Park, Alaska

Geomorphology ◽  
2011 ◽  
Vol 130 (3-4) ◽  
pp. 208-220 ◽  
Author(s):  
Megan J. Klaar ◽  
David F. Hill ◽  
Ian Maddock ◽  
Alexander M. Milner
Keyword(s):  
National Park ◽  
Glacier Bay ◽  
Glacier Bay National Park ◽  
Instream Wood

Mapping Glacier Bay National Park, Alaska

2010 ◽  
pp. 29-42
Author(s):  
Tom Patterson
Keyword(s):  
National Park ◽  
National Park Service ◽  
Cruise Ship ◽  
Careful Planning ◽  
Glacier Bay ◽  
Braided Rivers ◽  
Glacier Bay National Park ◽  
Park Service ◽  
A Site ◽  
Shaded Relief

Making a National Park Service (NPS) visitor map of a large, famous park such as Glacier Bay involves careful planning and many people. Preliminary work on the Glacier Bay map required a site visit to Alaska, consultations with park staff, and observing visitors using maps on board a cruise ship. The paper examines various mountain-mapping challenges, including shaded relief, landcover, glaciers, fjord bathymetry, braided rivers, and place names. The paper then ties these strands together by discussing the design of the final brochure map.

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