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Ears Wide Open

The Quarterly Bulletin of the Acoustic Ecology Institute

Number 2
May 2006

Institute Update

Current Activities Highlights
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On Ocean Noise and Ethics
Sneak preview some themes for future outreach
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Release of AEI's First CD
Bark Beetles and the Acoustic Ecology of Pinyon Pines
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Current Activities Highlights

During the early spring, the Institute has been stirring beneath the soil, preparing new growth that will emerge in the next few months.

We are putting together a new project, which will highlight creative presentations of scientific research. Inspired by the passion of board members David Dunn and Steve Feld, AEI will be encouraging the interface between science and sound art. The works we will highlight are designed to both engage the public and inform the research community, suggesting new lines of inquiry. By the time of the next quarterly issue of Ears Wide Open, we should be ready to premier this section of the site. In the meantime, AEI Executive Director Jim Cummings will be travelling to the University of California, Riverside to present on this work at the Sound, Environment, and Connective Technology Symposium in mid-May.

A burst of new research reports has also kept Jim busy. He is preparing a Special Report on the Marine Mammal Commission's aborted attempt to find a consensus among industry, military, academic, and environmental groups about how to address the impact of human noise on whales and dolphins. Unable to agree on a final consensus report, each of the stakeholder groups submitted its own summary of its views, with the MMC itself still finalizing its report. AEI's Special Report will summarize the conclusions of each. Keep an eye on the Science/Recent Research page of the AEI website for new summaries of individual research reports, as well. The Recent Science Findings link on this bulletin contains the most compelling new studies.

Finally, AEI's thumbs are tiring after four months of twidling, waiting for the IRS to provisionally approve our application as a 501(c)3 non-profit organization. When we submitted the application last August, we were told to expect a reply in 120 days, by early January. At that point, we were told they were backlogged, and it would take 200 days. Now, at 240 days, they tell us a response is 5 weeks away, sometime in early June. Needless to say, this has put a damper on our planned fundraising efforts. Given this situation, the membership donations from new members have played a key role by funding the modest overhead costs of the Institute. Now we just need to be able to solicit large donations that can pay some salary!

Ocean Noise and Ethics

Over the past two years, as I've found myself drawn ever deeper into the world of ocean noise, I've often felt torn between the voice of reasoned analysis of the issues at play and the measurable effects of our noise on ocean creatures, and a desire to speak more from the heart about the underlying questions raised by humanity's habit of moving ahead, blindly (deafly?), in whatever direction we wish.

My education began in late 2003 with a crash course in ocean acoustics and the effects of seismic surveys, undertaken while writing a report under contract from Greenpeace. From there, I got an immersion into agency and academic researchers who regulate and make noise at sea, thanks to being asked to moderate a panel at the 8th International Wildlife Law Conference in late 2004. From there, the editing of a special edition of the Journal of International Wildlife Law and Policy, to be published later this year, introduced me to industry analysts and field researchers tugging in both directions, some increasingly concerend about the effects of our noise, and others convinced that we are over-reacting. In the midst of all that, I engaged in a fairly lengthy dialogue with National Marine Fisheries Service staffers about their attempts to come up with a new ocean noise criteria.

This broad exposure to environmental advocates, field researchers, industry perspectives, and agency staffers has led me to understand that the effects of ocean noise are not easily understood or dealt with. But more importantly, I've become convinced that the central focus of most of the debate is misplaced. The dramatic, and tragically avoidable, strandings of whales and dolphins after noise exposure are, understandably but disoncertingly, dominating our attention, while other, more fundamental impacts and questions, receive little notice. I am becoming increasingly concerned that these rare deaths are far less important to the health of the seas than the subtler, increasingly widespread exposure of ocean creatures to chronic, moderate levels of human noise. The stress reaction triggered when human noise causes difficulties in communicating or repeatedly makes animals move away from disturbing noise sources is likely weakening most ocean creatures, making them more susceptible to the witch's brew of other human insults to their habitats, from toxins to warming oceans and diminishing food supplies. Recent research confirms that chronic ship noise increases stress in fish; the link between stress and reduced health has been confirmed in many animals (though not, to date, marine creatures).

I'll have much more to say about this need to address the subtler affects of noise in the months to come. Over the past few months, I've also been working on a couple of essays that move beyond the journalistic tone of most of the AEI publications. In these, I acknowledge the underlying, oft-unspoken deeper questions that need to be asked, about whether we have the right to be making so much noise in this world. These questions quickly lead to some murky territory (what about national defense? can we really forego offshore oil and gas deposits?), but pretending things are simple is probably not going to help us in these difficult times.

I hope to soon get these two essays into a form that is "ready for prime time." It is crucially important that we do not get lost in the minutae of acoustics science, or caught in endless loops of arguments about acceptible levels of exposure. While these are, of course, important topics to address, they can leave us disconcertingly distant from the fundamental choices that we are, in fact, making, regarding our relationship with the rest of life. It is important for us to attempt to appreciate the experience of ocean creatures, to consider the subtler effects of our actions on their well-being, and to resist the easy inertia that keeps us from addressing the deeper questions.

More on this in the months to come.......

The Sound of Light in Trees:
Bark Beetles and the Acoustic Ecology of Pinyon Pines

by David Dunn

Recorded entirely inside Piñon pine trees...

AEI Board Member, award-winning composer, innovative recordist, independent researcher, and eco-philosopher (whew!) David Dunn has released a compelling new CD in conjunction with the Institute. Thanks to a grant that funded the production costs, all proceeds from the sale of the new disc will be devoted to supporting the work of the Institute. We are very grateful to David for his generosity, and very pleased to present this innovative meeting of art and science.

First and foremost, The Sound of Light in Trees is a remarkable listening experience. Using contact mics and a unique probe microphone inserted into beetle bore-holes, Dunn opens our ears to a heretofore unimagined and rich soundscape inside pine trees. The resulting composition, carefully crafted from many recordings to invite us into the range of sounds we might hear inside any one tree, is at once utterly unusual, a chorus of clicks and scratches and tiny whines, and at the same time strangely familiar, its overall ambience and balance not far from that of a gentle forest soundscape of birds and crickets.

The disc is an important contribution toward the study of one of the most widespread "pests" in the forests of North America. Various species of bark beetles seem to be taking advantage of longer breeding seasons and mild winters to establish tenacious footholds in ecosystems ranging from the piñon-juniper forests of deserts and foothills to ponderosa and white pine forests at higher elevations. There is very real concern that these beetle infestations, which quickly kill large patches of forest, or leave entire landscapes speckled with dead zones, could spread up the Rockies and west coast mountain ranges, into Canada, and across to the forests of the eastern seaboard. For bark beetles, the shortest route from Arizona to Texas might be through Canada.

While most research on the social ecology of bark beetles , and their relationship to the forests in which they live, has been centered on chemical signals (pheromones), Dunn is one of the only researchers who has turned his ears to the acoustic behaviors and communication of these creatures. For several seasons, he has worked with foresters in New Mexico to see how acoustics might help to gauge the spread of beetle swarms. The results have been impressive: his innovative probe microphones often reveal the presence of beetles before the pheromone-based traps previously considered the best indicator of arrival of new outbreaks.

More interestingly, his investigations of the sounds inside piñon (or, as more common in scientific literature, pinyon) pines has led him to speculate that there may be a complex interaction between the trees (which, as their cells dry out, may produce ultrasonic sounds), a fungus that the beetles carry, and the beetles themselves, which he has discovered make an astonishing range of sounds.

In his ever ambitious yet humble way, Dunn presents his findings as both fodder for future study by the academic community, and as a fascinating soundscape art composition. The disc includes detailed liner notes, in which Dunn explores his findings and his musings about what it might imply for science and ecology, and provides a detailed bibliography of bark beetle research papers.

The CD is available online from EarthEar; the entire $15 purchase price will be donated to the Acoustic Ecology Institute to support our work.

[MORE INFO ON THE BARK BEETLE ACOUSTIC ECOLOGY RESEARCH]

[ORDER THE CD FROM EARTHEAR]

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