For the week of 12 August 2019
Greetings OpenChannels Community Members,
Frontiers in Marine Science published, Comparing the Underwater Soundscapes of Four U.S. National Parks and Marine Sanctuaries.
Abstract: Passive acoustic sensors provide a cost-effective tool for monitoring marine environments. Documenting acoustic conditions among habitats can provide insights into temporal changes in ecosystem composition and anthropogenic impacts. Agencies tasked with safeguarding marine protected areas, such as the U.S. National Park Service and U.S. National Oceanic and Atmospheric Administration’s Office of National Marine Sanctuaries, are increasingly interested in using long-term monitoring of underwater sounds as a means of tracking species diversity and ecosystem health. In this study, low-frequency passive acoustic recordings were collected fall 2014 – spring 2018, using standardized instrumentation, from four marine protected areas across geographically disparate regions of the U.S. Economic Exclusive Zone: Northwest Atlantic, Northeast Pacific, South Pacific, and Caribbean. Recordings were analyzed for differences in seasonal conditions and to identify acoustic metrics useful for resource assessment across all sites. In addition to comparing ambient sound levels, a species common to all four sites, the humpback whale (Megaptera novaeangliae), was used to compare biological sound detection. Ambient sound levels varied across the sites and were driven by differences in animal vocalization rates, anthropogenic activity, and weather. The highest sound levels [dBRMS (50 Hz–1.5 kHz)re 1 μPa] were recorded in the Northwest Atlantic in Stellwagen Bank National Marine Sanctuary (Stellwagen) during the boreal winter–spring resulting from bioacoustic activity, vessel traffic, and high wind speeds. The lowest sound levels [dBRMS (50 Hz–1.5 kHz) re 1 μPa] were recorded in the Northeast Pacific adjacent to a vessel-restricted area of Glacier Bay National Park and Preserve (Glacier Bay) during the boreal summer. Humpback whales were detected seasonally in the southern latitude sites, and throughout the deployment periods in the northern latitude sites. Temporal trends in band and spectrum sound levels in Glacier Bay and the National Park of American Samoa were primarily driven by biological sound sources, while trends in Stellwagen and the Buck Island Reef National Monument were primarily driven by anthropogenic sources. These results highlight the variability of ambient sound conditions in marine protected areas in U.S. waters, and the utility of long-term soundscape monitoring for condition assessment in support of resource management.
As always, if we've missed anything, please feel free to let us know. You may simply reply to this message, or you may email Allie directly at: abrown [at] openchannels.org.
You can read everything (not just the free stuff) we have found this week at https://www.openchannels.org/literature-update/2019-08-14.
Additionally, you can browse literature by the week we've added it at https://www.openchannels.org/literature-by-week.
Thank you for being part of the OpenChannels Community,
– Allie Brown, Raye Evrard, and the rest of the OpenChannels Team
Citizen Science and Crowdsourcing
OA: Njue, N. et al. Citizen science in hydrological monitoring and ecosystem services management: State of the art and future prospects. Science of The Total Environment 693, 133531 (2019).
Climate Change, Ocean Acidification, and Ocean Warming
OA: Pershing, A. J. et al. Challenges to natural and human communities from surprising ocean temperatures. Proceedings of the National Academy of Sciences 201901084 (2019). doi:10.1073/pnas.1901084116
OA: Price, N. N. et al. Global biogeography of coral recruitment: tropical decline and subtropical increase. Marine Ecology Progress Series 621, 1 - 17 (2019).
Food for Thought
OA: Willer, D. F., Smith, K. & Aldridge, D. C. Matches and Mismatches Between Global Conservation Efforts and Global Conservation Priorities. Frontiers in Ecology and Evolution 7, (2019).
Marine Protected Areas (MPAs)
OA: Letessier, T. B. et al. Remote reefs and seamounts are the last refuges for marine predators across the Indo-Pacific. PLOS Biology 17, e3000366 (2019).
Preprint: Magris, R. A. & Ban, N. C. A meta‐analysis reveals global patterns of sediment effects on marine biodiversity. Global Ecology and Biogeography(2019). doi:10.1111/geb.12990
Pollution and Marine Debris
OA: La Valle, F. F., Thomas, F. I. & Nelson, C. E. Macroalgal biomass, growth rates, and diversity are influenced by submarine groundwater discharge and local hydrodynamics in tropical reefs. Marine Ecology Progress Series 621, 51 - 67 (2019).
OA: Rinkevich, . The Active Reef Restoration Toolbox is a Vehicle for Coral Resilience and Adaptation in a Changing World. Journal of Marine Science and Engineering 7, 201 (2019).
OA: Kluger, L. Clara, Kochalski, S., Aguirre-Velarde, A., Vivar, I. & Wolff, M. Coping with abrupt environmental change: the impact of the coastal El Niño 2017 on artisanal fisheries and mariculture in North Peru. ICES Journal of Marine Science (2018). doi:10.1093/icesjms/fsy171
Soundscapes and Acoustics
OA: Haver, S. M. et al. Comparing the Underwater Soundscapes of Four U.S. National Parks and Marine Sanctuaries. Frontiers in Marine Science 6, (2019).