First Impressions

Following up on my last blog post (about culture) I thought I’d start this post with a quote. In the epic words of the Rolling Stones “you can’t always get what you want.”

I’m in Monterey Bay, California right now doing some fieldwork with my friend and colleague Dave Cade (a PhD student at Stanford) and as the quote alluded field work is filled with surprises.

I came down to help Dave tag humpback whales as part of his dissertation work with Jeremy Goldbogen on humpback whale kinesthetics and foraging ecology. Admittedly my interest is this visit is three-fold.  First, I wanted to see my buddy Dave.  Dave and I have worked together a long time and have been attempting to collaborate on project since we finished up our M.S. degrees in OSU’s College of Earth Oceans and Atmospheric Science. Second, I needed some training on tagging whales in preparation for my own fieldwork. As an addendum to my already rich PhD research I’ve been designing a tagging playback experiment that I am piloting with Dave’s help this summer from my favorite Five Finger Lighthouse. This July we’ll be playing back social sounds (Whups and Feeding Calls) to humpback whales in Frederick Sound.  The ultimate goal is to play sounds to tagged whales, so we can assess dive responses (should there be any), changes in foraging behavior, and of course, approach and avoidance behavior. We’ll also have a hydrophone in the water to document any acoustic responses from our focal animal.  It seemed wise to me to actually participate in a tagging event prior to trying to pull this off.  Lastly, I’m getting close to finishing up my PhD at Oregon State, and I’m trying to spread my wings and collaborate with more labs, institutes, and groups to see where my next few years as an acoustic ecologist might take me. A trip to visit my friend Dave at Stanford seemed like a great start.

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This July we will conduct playbacks to whales in the vicinity of the Five Finger Lighthouse. This island is nestled in Frederick Sound, Southeast Alaska. One of the world’s most productive humpback whale foraging grounds.

One of the folks I’ve been eager to meet is John Calambokidis, founder and research biologist of the Cascadia Research Institute.   Cascadia is a non-profit organization that is, in my estimation, the best example of non-profit research in the United States.  They successfully couple research of scientific merit with applied management implications. Further, they do so with humor, grace, and (from my outward eye and by their reputation), real concern for the environment. From this description, one can glean my excitement to introduce myself to John.

Well, spoiler alert, this weekend hasn’t gone as smoothly as I’d hoped. In part, I’m sitting in a coffee shop right now writing this. I am not tagging whales. Yesterday, despite our greatest efforts, we did not tag whales. We also did not run echo sounders or fly drones. In the words of my friend Dave Cade “it was a bust”. For me though, this weekend  was more than a bust.  Prepare yourself for the story I will tell for the rest of my life when someone asks me about my most embarrassing moment.

It’s about 8:15 a.m. We have seen, but not successfully tagged any of the humpback whales milling about Monterey Bay. I’ve not fallen on my face, said anything offensive, or made myself look overly confident while working on our 9 meter open air rigid hull inflatable. This should be easy enough. I’ve done fieldwork in Alaska, Hawaii, Antarctica, and the Oregon Coast. I spent months of my life living and working on boats. Not looking like a fool on the water should have been a given.

Now it’s 8:45 a.m., and we are a little further from shore. The swell has rolled in and, despite a lack of wind chop, the boat is noticeably rising and falling in the 8-13 foot rollers. At this point John begins to ask me about my research. We’ve met once before and he’s somewhat familiar with what I do. For whatever reason, however, I’m unable to articulately respond. This, for those of you who know me, should come as a surprise. Articulate is my secret middle name. It’s my tiny super power. It’s what I rely on when I am feeling foolish, lost or uncomfortable, and at 8:45 a.m., for whatever reason, my super power is gone, my brain, fuzzy, my mouth dry, my tongue uncoordinated. John continues, politely, to ask me about my work and as I worked through the rubber in my mouth to respond I realized something. My only option is, as politely as possible, to raise my hand ask John Calambokidis to please wait a moment, so I may vomit over the side of the vessel. Repeatedly.

There it is. Networking.

Moreover, as it turns out the simple act of talking turned out to be the trigger. So over the course of the day (we did stay on the water) every time I attempted to have more than a four word conversation, I’d have to politely excuse myself to throw up. Repeatedly. How can I speak more plainly: talking to John the founder and director of the Cascadia Research Institute, made me vomit. #NeverGettingHiredAnywhere.

To add insult to injury, we didn’t tag any whales yesterday. The behavior of the animals, possibly in combination with rising afternoon winds, and we couldn’t quite seal the deal. The drone pilot who’d been scheduled to join us on the water took a page out of my book and – not having a reputation as a seamen to uphold – asked to be returned to shore before he tossed his cookies. For me though, to add injury to injury my sensitive tummy didn’t let up until this morning, two hours after Dave and company left without me on flat calm waters to go tag whales again. I won’t go into the fine scale details of why I couldn’t go out today (I would have been happy to spend the day throwing up on the side of the boat again if it would salvage my poor reputation), but it suffices to say that while one can maintain some grace while vomiting over the side of the boat, if the tummy problems manifest in a different form… one should stay home.

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The view of windless, flat calm, Monterey Bay.

So here I am, at a lovely coffee shop in Monterey Bay, trying to imagine how I may have better prepared for this trip to avoid such calamities. There are some options, certainly, but none of them obvious or foolproof. So what I am left with instead is not how to avoid this situation in the future (I will inevitably be sea-sick again), but how to handle my current situation with as much grace as possible.

This, dear readers, is where I (as always) return to the esoteric. I once believed that in life I had, at the very least, control over my actions, my words, and my body. As it turns out, this weekend I relinquished that control to the ocean; and, if I think broadly, that is where the balance of power rightfully belongs.

So, rather than fight the literal movement of nature, I am left instead seeking grace. Grace is found in humility. Humility found in humor. So rather than crawl in a hole and cry, I’m here. Writing this.

My strengths are not in successful networking. The word makes me uncomfortable. When asked to put my “best foot forward” I have a tendency to take a step backwards. Forgiveness, on the other hand, and sincerity, these are my strengths. So, today I tell my ego to take a few days rest. I forgive the ocean for exposing my weaknesses and begin mentally drafting the email I’ll send to John Calambokidis next time I want to talk about collaborations.  It will start: “Dear John, you may remember me as the girl that vomited repeatedly from your boat. I was wondering if you’d be interested in collaborating on an acoustics project?”

The Season is Officially… over.

The 2016 Alaskan field season is officially over. I can drag my feet and hang my head all I want, but the acoustic and behavioral data collection for 2016 is done and the process of studying for my comprehensive exams is in full swing (I’m taking a short break from outlining the management procedures of the IWC to write this blog). Admitting that I will not wake to the sound of humpback whales breathing outside my tent is a tough reality. Going a day without seeing a seal or an otter has been harder than I expected, but I realize it is time to say goodbye.

This summer was challenging, for various reasons. Year two, I think, always is. Expectations are variable, hopes run high, and the delicious satisfaction that comes with problem solving doesn’t always happen. The problems are already solved.

Despite this, the 2016 field season remains the most lucrative of my career , with hundreds of hours of data collection and a total of nearly a thousand surveys to compliment the anticipated 3,000 hours of recordings. I learned a great deal about nature, humanity, and myself, and I have high hopes that our scientific efforts will be fruitful! Further, I deepened some of my most valuable relationships (scientifically and personally) which colleagues that intend to keep for a lifetime.

But my writing this blog post doesn’t adequately paint the picture of what life felt like on the island, or why we study what we study. PBS, however, has done a pretty nice job of doing that for us. So I encourage you to watch the five-minute film below. It was produced by PBS and Alaska public media, but really it’s the brainchild of Hanna Gomes.  She did a really nice job capturing our world of Strawberry Island. I can’t think of a better way to say goodbye.

Watch and Listen

My broken heart limped off of Strawberry Island a few weeks ago on a day when the fog was too thick to permit my sentimental heart watch the island fade into the distance. But while our field season on the island had come to an end, my field work for the summer was not quite complete.

My work in Glacier Bay studying humpback whale acoustics is partially based on my previous work conducted from the Five Finger Lighthouse. I’m interested in comparing the two regions (both the soundscapes and the behaviors of the whales themselves), as we have historic population and acoustics information from both regions dating back to the late 1980’s (Thank you Malme and Miles! Thank you Scott Baker!). To get the ball rolling on this comparison I made my way to the Five Finger Lighthouse for a short 10 day foray into “late season acoustic behavior”.

I don’t have anything definitive to report, except that the team of volunteers who have been working on maintaining my favorite historic structure have been hard at work, and that the whales were abundant beyond my wildest dreams. If Glacier Bay is indicative of high quality interactions with individual humpback whales (remember Cervantes), than Frederick Sound is a strong argument for quantity over quality. In this, my tenth summer spent with Alaskan humpbacks, I finally broke the record for highest concentration of animals in a single area. Don’t believe me? Watch the short clip below and see a glimpse of the 40+animals milling around the region. Once you’re done watching, listen to the sound file to get an idea of what these animals were saying when this video was filmed. In my humble opinion, it is in this pairing of sight and sound that we begin to understand.

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Listen

(These videos and recordings  were collected  under a research permit and with zoom lenses. Endangered or not it is a violation of the Marine Mammal Protection Act to approach a humpback whale within 100 yards, to alter the behavior of an animal, or to recklessly operate a vessel — even a kayak– in the presence of humpback whales). 

The Little Things

IMG_1169What is 5 1/2 feet long, weighs 135 pounds, and isn’t an intern? My favorite odontocete: Phocoena phocoena, the harbor porpoise.

Due to their vessel aversion they are slightly hard to study, and their distribution, population structure, and acoustic behavior in the Park is still largely unknown. Harbor porpoise, while not an endangered species, are very susceptible to disturbance from noise. I’m not personally studying the impact of noise on these graceful creatures here in the park, but I am encouraging my team to come up with some creative study ideas.

While deterred by motorized vessels, harbor porpoise don’t appear to be disturbed by kayaks. These lovely animals often swim within meters of us when we survey on the water. Their vocalizations are too high frequency for our hydrophones to pick up, but I can’t help but wonder if they’re echolocating our equipment.

 

Three down one to go

Well folks, furlough has come to a close and it’s time to return to the island for Stint 4. This will be the last sampling period for the Acoustic Spyglass Project and as I sit here in Bartlett Cove I’m torn between sentimentality, gratitude, and the practical indifference that comes from knowing that while the end is near, this field season isn’t over yet. 

Transitions can be tricky (consider the life of a whale researcher studying migrating whales!), but they are valuable. The next 8 days give us a last chance to watch deeply and see if it is only us, the researchers, who are wrapping up the season, or to see if perhaps the wildlife is also shifting as late summer approaches. 

Fingers crossed we are attentive enough to notice.

The first group photo of Stint 4

Saying Goodnight

Going to bed (and by bed I mean tent) on the island is easy. It is often rainy and cold;  recently the days have been growing shorter revealing black starless nights that challenge my trust of these old woods, and when the weather is clear enough to work our days can be long. But occasionally as we are tucking ourselves into our sleeping bags at night something happens that’s worth getting up for.

This was the case a week or so ago when the exhales of one whale (SEAK-1899, a.k.a. “Nacho”, a.k.a. “Cervantes”) persisted for so long, and with such intensity, that we left our tents and made our way in the fading sunlight out to the beach to see what was going on. As it turned out Cervantes was feeding in our intertidal; take a peek.

Cervantes visits us often these days. This isn’t unusual for for Glacier Bay whales, which exhibit strong maternal site fidelity to the Park (for a really interesting scientific read on local recruitment of humpback whales in Glacier Bay and check our Sophie Pierszalowski’s master’s thesis here), but it is new for our field team here on Strawberry Island. The ability to recognize and interact with an individual humpback whale in such close proximity requires patience, attention and time. While our team last year grew capable of discriminating between individuals whales (a requirement for focal following a whale that’s a mile and a half away), the ability to recognize an individual whale with certainty every time one sees it requires repeated interactions. For humans who are a measly 1.75 meters tall, these interactions are imprinted more efficiently if they occur at close range.

Individuality matters. Increasing evidence for personality in animals confirms what pet owners for decades have intuitively known – animals have unique dispositions. Not all whale are created equal, and to understand how the population as a whole may respond to changes in the environment, necessitates sampling a wide swath of individuals. For example, if we follow Cervantes around from birth until death we may conclude that all humpback whale forage intertidally (likely not the case), that all whales annually migrate (also not entirely true) and that all humpback whales blow bubbles at their prey (which would be interesting… but unlikely).  Further, what if Cervantes proved to be an anomalous whale? Not wholly on the “average” spectrum for whale behavior. Cervantes is of unknown sex; it is tempting to infer that an adult whale of unknown sex who has never had a calf must be male (this is in fact what our field team inferred). The possibility, however, fully exists that Cervantes may be a late bloomer who will calve in the future and against what we anticipate given the average age of first calving, prove herself to be a lady whale after all. If Cervantes was the only animal we studied, we might infer an age of first calving for humpback whales that wasn’t accurate for the majority. So if we want to understand whales instead of understanding whale we have to look at many individuals.

Cervantes (SEAK-1899) visits the Strawberry Island survey point frequently. The entanglement scars near the dorsal fin help our team to identify this whale.

Why then are these repeated interactions with Cervantes so valuable? They are valuable scientifically in that we have the ability to investigate individual variation by linking behaviors with a known animal. More importantly for our team right now, however, these interactions are valuable to us personally. Living in the presence of giants inspires a person; knowing the giants’ name and saying good morning to him everyday, in my humble experience, moves a person beyond awe and into action. As overused as the Jacque Cousteau quote is, one cannot deny that people protect what they love. Cervantes’ ability to exist in such close proximity to our camp give us permission to love these animals, this shoreline, and this ocean just a little more strongly. This is a gift, and I am grateful.

The Talking Earth

*This post is dedicated to my mom, who taught me how to read and how to listen*

When I was a small child my mother read a book called “The Talking Earth” out loud to my sister and I. As an adult I can’t quite remember the details, but it was about a Seminole girl alone in the woods interacting with plants, animals, wind and water in an effort to regain her faith in the power of nature. I vaguely remember her saving an abandoned otter pup and nursing it back to health and something lovely about a panther. What I poignantly recall, however, is a passage in the book about listening to the language of the earth as she nurses the otter; the beating hearts and warm bodies of mammals, the beating wings of the birds, and the sounds of rain and wind that collectively gives all animals a way of understanding the world. This book inspired a lot of thoughts in me as a child.

Now, I spend a lot of time thinking about only one species, as it communicates with other animals of the same species, underwater, in the Beardslee Island Complex, in Glacier Bay Alaska. I dream about humpback whales calling in these waters at night (and often as I nap between shifts throughout our long days). But living on this island does something very kind for me, it speaks about more than just the whales. So a few days ago I stood alone on the beach at 4:07 am preparing to survey for whales and as the sun rose I took a few moments to listen to what the earth had to say to me.

The tide was shifting; I could see the water converging at our survey point. The clouds were rolling in on a southwest wind, and the fog was preparing to slowly take over the coastline in front of me. The loons called to each other in the pink turquoise rising sun. The family of oystercatchers that we watched last year gave one another their high cackling good morning greetings . The gulls squabbled, the sea lions yawned angry yawns. The earth woke up in pastel glory. When I was experiencing my first Alaskan winter I wrote that the Alaskan sun doesn’t burn, it blushes. This particular morning at 4am, the sun blushed and I was there to experience it.

It was a lovely moment for me. One of the few moments on the island when I was truly afforded solitude. Fieldwork is a strange bedfellow- the six of us are isolated on this island, yet we are never out of earshot of one another. I joke that we are isolated, together- and at 4am if given the chance to sleep in, our team will take it (and deserve it). Why I stayed up to survey myself? I’m not sure. Maybe I needed the space. Maybe when I woke up to check the weather it was too beautiful to go back to bed, and too foggy to be worth rousing my snuggling crew.

I’ve been going back and forth to that moment in my mind and it reminds me again of the book, The Talking Earth that my mother read to me as a child. It isn’t just the sounds of the earth that I found remarkable, though certainly sound is what resonates with me, it is the subtle signals that the earth gives all those who inhabit it, humans included. It requires an attentiveness to hear the messages in nature, and therefore a desire to listen in the first place. Subtly is a divinely natural quality.

I realize in writing this that this is important to me because it’s how I try to run my field team. With grace and intention, routine and subtlety, with the expectation of the best of my crew, and with consistent communication. Sometimes I succeed, often I fail, but it is in this emulation of nature’s voice that I think we can both collect the best data possible (you can go back through this blog to learn more about the technical rigors of our field collection), while absorbing the many lessons that come from simply observing a place for as long as we are privileged to observe the waters of Strawberry Island.

The scientist in me doesn’t sleep through these sorts of introspections. My job, among many in science, is to try and take these intangibles and make them tangible. My job as a creative human is to do this without losing the essence of what makes these observations incredible. So I won’t deny that in my grand sunrise moment I grinned a little knowing that all of the glorious things I was listening to were being recorded by a two tiny terrestrial recorders that were lent to me by the Cornell Lab or Ornithology (thanks to my advisor Holger and BRP!). When I’m not in the field I’ll post some clips of the Talking Earth here in Glacier Bay, I’d encourage you to close your eyes and imagine being here. Here are a few photos to help you along.

Your Alaskan Correspondent,

Miche

 

 

Introducing Myself

Hello, my name is Morgan Kroeger and I am an undergraduate student at Oregon State University. I am studying fisheries and hope to be working with sturgeon in the future. I am finishing up my third year and I hope to graduate on time next year. From there I hope enter a graduate program and further my studies.

As of such, I do not have a personal project clipped on the back of this summer research adventure. I would certainly be delighted to interweave my own project into the upcoming research event, but I sincerely would not know where to start. As it is, this is a large and intensive project, and since I am not as experienced as the majority of my colleagues it is best that I focus on the main Acoustic Spyglass project before diving into other channels.

As for how I stand on this project, I am three parts excited, two parts nervous, and one part confident. I realize that these parts do not add up to anything coherent, but neither does the scale that I am basing it off of.

I am excited to be out on the island and get into the grit and grind of field research. I am excited to learn the seeming labyrinth of protocol, sampling methods, and the organized chaos that accompanies any kind of “out there” work. I am excited to further my knowledge of fieldwork and expand my skill set. I am excited to monitor humpback whales in their summer habitat. I am excited to be helping a project that will have an impact on management concerning humpback whales.

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Me with some of the hiking gear that I’ll be bringing with me for the Acoustic Spyglass project

I am nervous about messing up in all ways possible. I know I can handle stress and pressing situations, but the prickling of nerves is still there under the skin, an impossible itch that will remain. I am not nervous about improbable threatening situations, like being struck by a summer storm when out in the kayak, or temporarily abandoning camp while the resident black bear casually ransack the little village of tents for food. I am nervous, maybe worried is a better word, about the little things. The small mistakes that can have quite the sucker punch, like dropping the theodolite, or incorrectly entering data. I know and understand that these worries are relevant, but they are held at bay with practice and training.

I am confident that I can integrate myself into the team and the research. I am confident that through the Acoustic Spyglass project I will expand and deepen my skill set regarding field work and data input. I am confident that I can and will help the Spyglass project further its study. I am confident that I will survive. I am confident that I will thrive.

 

 

Making a splash in the world of marine mammals

*Guest Post By Lucas Williams*

Hello friends,

Those who’ve been gracious enough to check out my blog are likely aware that I spent last summer in Glacier Bay, Alaska as a field tech under the mentorship of Michelle Fournet (Miche). Well, I am happy to announce that I’m doing it all over again. I will be returning to my home away from home, Strawberry island, for the summer of 2016.

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Oh yeah, I’m back baby

I get to go back out into the field this summer to practice some ‘hands on’ science (not to mention experience some of the best camping this world has to offer for 3 months), but my school year has also been filled with science. There’s just been a lot more numbers involved, and lots of maps.

Before I joined everyone in Alaska last summer, Michelle and I sat down several times before the field season started to discuss potential thesis projects I could do using the data we would collect. My original idea was to investigate sound shadow usage by humpback whales in Glacier Bay. Sound acts as a wave, and similarly to light, can be blocked or dampened by obstructive objects. I was going to use the spatial data we collected to determine if humpback whales were foraging/traveling more frequently in sound shadows created by the topography and bathymetry of the survey area, and compare densities in sound shadow areas depending on level of water vessel traffic. Unfortunately, the whole survey area was essentially one large sound shadow, making any kind of comparison on the local scale largely pointless.

So, my original project was bust. But, with plenty of guidance from Michelle, I was able to craft an even better thesis project. I decided to investigate corridor usage by humpback whales. This eventually evolved into my current thesis project, eloquently titled “Local scale habitat use by humpback whales (Megaptera novaeangliae) on a Southeast Alaskan foraging ground”. I’m looking at how whales use their forage grounds on a smaller scale to minimize energy expenditure while maximizing foraging intake.

I’ve made a lot of progress on this research, but not without learning several things I was told but certainly didn’t know until I experienced them myself. Those included:

  1. You never get everything right on the first try when it comes to writing a scientific paper
  2. Spreadsheets are an underappreciated form of art (yes I said it)
  3. A lot of data analysis is actually just learning how to use software
  4. ArcGIS is a sentient program that feeds off the frustration of innocent and naïve users.
  5. Finding a good mentor is like receiving a gift that just keeps on giving

This all lead to this previous weekend where I gave a 15 minute presentation of my project’s current results at the Northwest Student Society of Marine Mammals conference in Seattle. Not only are conferences a lot more fun than I anticipated (scientists are cool) but the presentation itself served as my first formal introduction to the marine mammal world. It wasn’t a huge hello, more like a friendly wave, but it felt like real progress.

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A density heat map representing traveling whales in the survey area. Notice the bright green corridor in the center

Whether I end up becoming a professional marine mammal scientist is still up in the air. If you had told me last year that I would be presenting legitimate scientific results at a conference before heading off to a field season in Alaska I would have laughed in your face. But here I am. I don’t exactly know what’s in store for the future, but I’m damn excited. Here’s to another awesome year that I fully expect will challenge me in all new ways.

I’m going to make a more concerted effort this summer to bring more content to this blog as the season progresses, and you can expect another post from me in the near future.

Cheers!

Luke

Find Your Park

The marine forecast is calling for 25-knot winds and 5-foot seas in Glacier Bay National Park today. Yesterday, when we were tightening the last nylocks on our hydrophone landers, and working out the last details of our array deployment, folks were pretty keen to remind us that the weather was going to kick up. I decided not to be nervous, what’s the point.

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Clockwise from upper right: Snacks, Kenya, Bumblebee, and Bruiser.  The hydrophones that listen where we cannot. 

Today in the rain and the fog we put four instruments, that our team has literally pour blood sweat and tears into, into the ocean for a second year. Aside from one overactive buoy on the final drop (I turned to Chris and said, “My only concern is about that buoy.” I should have listened to my gut sooner), our day went smoothly and quickly – despite the persistent drizzle and fog dancing on deck. Our efficient little team completed the deployment by 10:45am. Plenty of time for a quick visit to Strawberry Island, and a boat ride home, all before the weather hit. Unlike last year, where we hooted and hollered our victory, this year the boat ride back was subdued. I didn’t dance a victory dance, I sighed a blissful sigh of relief.

Want to know something though? The best part of today wasn’t getting the hydrophones in the water (though long term, I’m certain that’s what I’ll be most grateful for), the best part was seeing the harbor porpoise sipping air off the port side of our deployment vessel, watching the bull sea lion growl with his huge mouth agape, and spotting the seals and birds diving after the same schools of small fish. I love our hydrophones – don’t get me wrong. I’ve slept with them next to my bed at night, kissed their housings, and whispered sweet nothings to them. I love them most, however, because they give me the motivation, the inspiration, and the permission to be outside here in Glacier Bay.

The National Park Service is having its centennial anniversary this year. It has been one hundred years since the intrinsic value of our wild places was recognized, and protected for no other reason than to ensure its persistence. Being a part of this legacy is something that I can’t quite put words too. Joining the ranks of my mentors, past and present, and contributing to what we know about and how we interact with the natural world with forever be one of my greatest achievements. I’m fortunate enough to stand in the footsteps of giants; for me, however, those footsteps were carved out by the journey of glaciers moving through this landscape well before I was born. Footsteps that have become the ocean home to the animals that I love, and the backdrop to the science that I create.

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Staged and almost ready to go on the dock in Bartlett Cove. Our equipment prep was completed in the company of otters, eagle, and Bonaparte gulls happily cackling

Technology enables me to listen to a world I otherwise cannot hear, but it is the sound of the ocean butting up against the islands that brought me to acoustics in the first place. We human tool users are ingenious in finding ways to solve problems and answer questions. Places like Glacier Bay, however, are essential for inspiring the questions in the first place.

One hundred years. That’s not a trivial tenure. How many times over the past 100 years have you visited a National Park? If you’ve never been, let this be the year that you find your park. I’ve certainly found mine.

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The view from Strawberry Island, overlooking our hydrophone array: Glacier Bay National Park