Wednesday, February 7, 2018

Birdwatching on Lombok: Tracing Wallace's Path

If you've taken a biology class, you've probably learned about (and forgotten) a man named Alfred Russel Wallace. But even if you've never taken a science class in your life, you've heard of (and remembered) a man named Charles Darwin. Seriously, just look up at my blog banner. I've spent the past six years "tracing Darwin's path" and writing about it on this blog, titled Natural Selections in his honor. Well, I think it's time I traced Wallace's path for a moment instead.

Here I am holding an original 1859 first-edition of Darwin's On the Origin of Species in the basement archives of the Whitman College library.

Wallace was born in Wales, the seventh of nine children, when Darwin was a teenager. Unlike Darwin, he grew up poor, and he had to drop out of school at the age of 14 to work, but he didn't give up on education. He became an avid beetle collector and kept up on the latest scientific happenings by reading the original literature as it was published (goals!) One of the unsolved mysteries in natural philosophy (as science was called back in the day) was the origin of species. Where do new life forms come from? Wallace became obsessed with this question. An intentional, focused guy, he found a career that would let him explore nature and puzzle over this question full-time. At the age of 25, Wallace boarded a ship for Brazil to begin his professional life as a collector of valuable specimens: big butterflies, colorful birds, pressed plants. He then shipped these preserved organisms back to England where they were sold to wealthy private collectors.

Here I am holding my overpriced, paperback copy of Wallace's The Malay Archipelago, bought in a bougie Kuta bookstore and read in the jungles of Bali and Lombok, where I like to imagine Wallace hiked before I did.

Brazil didn't treat Wallace well. During his four years there, his brother (who had come to join him) died of Yellow Fever, and his crates full of specimens burned up in a ship fire that nearly drowned Wallace himself. Incredibly, Wallace tried again. His next destination was Southeast Asia, and here he found his greatest successes. During a malarial fever, he penned an article about the origin of species, which turned out to be the very same Theory of Natural Selection that Darwin was working on. The two men were co-authors on the first published paper, but Darwin gets most of the credit in hindsight because of his powerful book, On the Origin of Species.

Today, Wallace is most famous as "the father of island biogeography," a field that concerns itself with understanding the distributions of organisms across islands (and the ever-increasing fragments of habitat that exist on mainlands.) While collecting in Indonesia, Wallace noticed a peculiar thing. The islands closer to mainland Asia were home to one set of fauna, while the islands closer to Australia were home to another. Curiously, the transition was not gradual. As he pinned butterflies and skinned birds, Wallace made a startling discovery: the change occured on an invisible line between the small, nextdoor islands of Bali and Lombok.

Wallace's original map showing his revolutionary line, not yet named in his honor.
Credit: Wikimedia Commons.

This invisible divider has been named Wallace's Line. It can be traced diagonally through the islands of Indonesia and Malaysia, separating them into biogeographical zones labeled "Indo-Malayan Region" and "Austro-Malayan Region." I couldn't pass up a chance to cross the line myself. What could be more human than to flaunt the limitations of the natural world by travelling from the land of primates into that of marsupials? The biogeographer Jared Diamond wrote, "Our ancestors may have crossed from apehood to humanity as they crossed Wallace's Line." Surrounded by divers headed for Gili Trawangan, honeymooners aiming for Gili Air, and surfers bound for Lombok, I boarded the ferry with an imaginary line as my destination.

Wallace's line is just an imperfect approximation of the real world. But I liked to think I crossed it right... here!

Once on Lombok, I couldn't just turn around and come home. I wanted to see this differet faunal assemblage for myself. So I hired local birdwatching guide, Saleh Amin, known to everyone as Ale, for one long day. Join us!

Collared kingfisher.

Another collared kingfisher. Isn't it funny how kingfishers always seem to be named for a circular accessory? In North America we have the belted kingfisher; in South America we add the ringed kingfisher; and now on Lombok I've seen the collared kingfisher. What's next, the braceleted kingfisher?

Ale picked me up at 5:30 am at my sketchy Sengiggi hostel, the confusingly-named Borneo Homestay, where I had been sleeping on a thin mat on the roof for $5 a night. (At least I wasn't in one of the beds downstairs, which turned out to be infested with bed bugs.) Since I was alone, I rode on the back of his motorcycle for a slightly-discounted $145 tour. We headed straight for the other side of the island. After two hours of wind in my eyes and knee pain from clinging to the back of his scooter, I wished I'd sprung for the $185 car version. Oh well.

White-shouldered triller female.

On the way, I opened a greasy cardboard box and ate my breakfast, which I'd asked the hostel guard to buy for me the night before. It was Milk and Cheese Mooncake, a spongy, sweet, pungent pastry with a smooth, brown surface and a honeycombed, yellow interior. I felt a cold coming on, morphing from yesterday's sore throat to today's asthma. Part of me wished I had stayed in bed, or should I say, on my sleeping mat.

Blue-tailed bee eater. Strikingly similar to the olive bee eater from Madagascar.

Our first stop (finally) was Gunung Tunak, a provincial park on the southeast coast of Lombok. We arrived around 7:30 am. There, we were greeted by Dennis Wahyudi (known as Wahyu), his wife, and his kindergarten-aged son. This three-person family shared a motorbike and followed us down the potholed dirt road for our tour. Wahyu and Ale were both skilled photographers, lugging enormous telephoto lenses and tripods all day. When we reached the sea, we scrambled up a grassy hillside to a raised wooden platform under a roof -- the Indonesian picnic table.

The picnic platform where we cooked gourmet ramen for a morning snack.

A grassy hillside and tidal lagoon in view from our picnic platform.

Snacks abounded. We started off with sickly sweet pancakes, sugary black tea, and mie, a less-soupy and more-flavorful version of Top Ramen cooked over a camp stove.

Zebra finches. These birds make popular and prolific pets. The preschool where I worked in eighth grade had a cage of zebra finches. The females laid fertile eggs every day, and the teacher was constantly trying to find homes for the glut of babies.

Pacific swallow. Looks similar to our barn swallows back home, but without the blue chest bar and long forked tail.

Ale is a 32-year-old birder and naturalist with an undergraduate degree in biology. He's taken the last nine years to figure out his next step. Now, he thinks he's found it: a Master's of Protected Area Governance and Management offered in Queensland or Tasmania, which will enable him to help Lombok run its parks better. Ale hopes to become a government minister so he'll have power to protect Lombok's ecosystems.

Ale and I pose on the sea cliffs of Gunung Tunak Provincial Park.

"All the research and knowledge in the world doesn't help," Ale told me, "if the government doesn't make good policies to support conservation." I was inspired to see such a knowledgeable naturalist motivated by management. No matter how much Ale loves basic ecology or bird photography, he will not let these passions distract him from finding applied solutions to the urgent needs of conservation.

Olive-backed sunbird.

Lemon-bellied white-eye.

I saw with my own eyes why Lombok's parks need Ale. At the entrance to Gunung Tunak lies a brand new butterfly garden, a grassy parkland studded with a few trees and divided by a pleasantly curvy concrete path. Two rows of windmills glitter in the sun, and a red-and-blue sign proudly claims, "Cooperation of the Korean Government." Lacking are the butterflies. The project lost momentum before the pollinator-attracting shrubs and flowers were planted.

The new butterfly garden, with windmills and grass in place of old-growth forest.

"That's where I found the elegant pitta nest," Ale told me, pointing to a bit of grass. "Right there." Two years ago, this so-called garden was dense, healthy, old-growth forest.  "I told them not to cut it," Ale continues. I don't hear an edge in his polite tone, but underneath his words lie a smoldering frustration and desperate hope to save what remains of Lombok's forests. "That's why I need to get my Master's and manage these parks." For the ecosystems, there's no one I'd rather see in charge than Ale.

Lombok spangled drongo. While technically categorized as a subspecies of Wallacean drongo (Dicrurus densus vicinus), found throughout Indonesia, this bird also shows some characteristics of the spangled drongo (D. bracteatus), native to Australia. That's why birders like Ale have given it its own common name, the Lombok spangled drongo, and hope to describe the species with a Latin name soon.

Pale-headed munia. I love the munias, a group of thick-billed seedeaters. The pale-headed munia is the most common, and one of the most beautiful in my opinion. I love its silver hood.

Scaly-breasted munia. This bird's intricate "scales" arise because each rounded feather is outlined in black.

Black-faced munia. We originally identified this bird as the more-common Javan munia. Over lunch, we looked through our photos and, noticing the penciled belly, realized we had seen a flock of three black-faced munias instead!

Five-colored munia. The highlight of our day. I was trying to identify these munias -- red head, pure white breast -- but they didn't fit any of the categories. Ale got a look and let out a whoop. They were five-colored munias, a bird so close to extinction on Lombok that Ale hadn't seen one since 2016. And here we were, watching a flock of five of them chatter and peck seeds at the seaside!

The sea cliffs were so high, we couldn't hear the splash when we threw stones over the edge.

Pure turquoise water. We watched white-tailed tropicbirds fly across the cliff faces, but they were too far away for my camera to capture.

Wahyu had a smartphone by Xiaomi, "the Apple of China." The phone has a neat trick of blurring the background to imitate the focus of an old-fashioned camera.
I asked if the grassy hillsides were like that naturally, or if the native vegetation had been removed. Ale said the grass was native, but then I encountered these cow pies, and I'm sure bovine grazing has an effect. One thing that never changes, no matter where I go in the world: there are always cows.

Arctic warbler.

Yellow-vented bulbul. The most common bird on Bali. In the mornings, I watch these street-smart birds dine from the Hindu offerings outside my bedroom window.

Since 2012, Ale has been writing a Bahasa Indonesia guide to the birds of Lombok and Sumbawa (the neighboring island to the east). The book, illustrated with his own photographs, contains 80% of the 297 bird species recorded on these two islands. Ale tried to get the Department of Natural Resources to sponsor its publication, but he had to decline their offer, which would have left him with almost none of the profits from his six-year-long labor of love. I think the Department lost a big opportunity to attract naturalists to their island, but I know Ale will find another way to publish.

Red-chested flowerpecker. The female doesn't have the red chest...

... but she does have a nice red rump!

Long-tailed shrike. An evil bird, just like the loggerhead shrike I photographed in Florida.

When I told Ale that I was on Lombok to trace the footsteps of Alfred Russel Wallace, he gave me a funny look. "You know Wallace, don't you?" I asked.

Ale smiled. "Alfred Russel, of course. I am actually narrating a documentary about his servant, Ali, who worked with him for seven years." Sure enough, when I got back to my rooftop hostel, I found Ali mentioned in my copy of The Malay Archipelago. Ali was a fifteen-year-old boy when he joined Wallace's team, and he proved instrumental to the voyage.

Wallace wrote, "When I was at Sarawak in 1855 I engaged a Malay boy named Ali as a personal servant, and also to help me to learn the Malay language by the necessity of constant communication with him. He was attentive and clean, and could cook very well. He soon learnt to shoot birds, to skin them properly, and latterly even to put up the skins very neatly. Of course he was a good boatman, as are all Malays, and in all the difficulties or dangers of our journeys he was quite undisturbed and ready to do anything required of him."

When Wallace returned to England in 1862, Ali took his name out of respect, to become Ali Wallace. Here I was thinking Wallace was overshadowed in the history books, when really I should've been giving due credit to Ali!

Pied bushchat female.

Lesser frigatebird.

Pied fantail. Ale and Wahyu called this bird to a particular bamboo clearing, where it posed and sang and fanned its tail for us.

Later, after Ale and I left for lunch, Wahyu tracked down its nest and got some glorious shots. For my part, I'm content with this one, showing a territorial bird searching in vain for a rival to fight.

After Gunung Tunak, we crossed back over Lombok to the west side. On the way, we saw two little-brown-jobs called cisticolas. We also paid for parking at Lombok International Airport so we could explore the lake and weed-fields on its outskirts. We dipped on the cerulean kingfisher, a tiny bird of shimmering turquoise plumage, but we did find a few airport birds.

Zitting cisticola. This wide-ranging species is found from Africa to Europe to Asia.

Golden-headed cisticola. Of the 50 cisticola species, only two are not found on Africa. This one, the golden-headed, is found from India to Australia. And the other, the Madagascan cisticola -- well, you can guess where that one is found! No, I did not see one.

A lesser coucal after a rainstorm at the airport. This bird looked identical to the Malagasy coucal, which I saw both in the wild and tied up before being slaughtered for dinner. Ale told me that coucals are notorious for hiding inside bushes, even when they sing. (Most birds perch up high to put on concerts.) The only thing that reliably draws coucals out of the shrubbery is rain: once they get wet, the ruffled birds need to dry out their wet feathers. Thinking back to Madagascar, that explains why all my photos of coucals show disheveled, damp birds after storms!

Common myna. This species, native to continental Asia, is considered by the IUCN to be one of the world's most invasive species. I've never been to mainland Asia, but I have been surrounded by mynas in South Florida, South Africa, Madagascar and Lombok.

Eurasian tree sparrow. Another invasive making its home in the airport. At first I though this bird was the ubiquitous house sparrow, but look at that black cheek-spot, and you'll see that it's a close relative, the Eurasian tree sparrow. Without house sparrows as competition, these tree sparrows take on the aggressive, urban role on Bali and Lombok.

For the second half of our journey, we arrived at Kerandangan Nature Reserve just outside Sengiggi. I'd been here yesterday for a lovely forest hike to two waterfalls. I'd seen kera hitam (the Javan lutung, Trachipithecus auratus, a black monkey of the colobus family) and kera bali ekor panjang (the crab-eating macaque, Macaca fascicularis, the same kind I saw in the Ubud Sacred Monkey Forest.) I'd photographed giant millipedes and explored the smooth rock-chutes polished by flowing water. Today, none of that was on the agenda. We had two missions.

A derelict sign at the otherwise well-maintained Kerandangan Nature Reserve, advertising "wild watching."

Our first mission was the sought-after paok laus (elegant pitta, Pitta elegans). Ale found this bird a week ago by watching an adult pitta carry more worms than it could eat deep into the forest. He then spent days searching for the nest. Usually pittas nest in a meter off the ground in bushes, but this one was tricky. Ale finally found the nest wedged high above his head in the crook of a dead tree. Photographers come to Lombok from all over the world to capture an image of the elegant pitta, not only because of its beautiful green and red colors, but also because there is a fierce competition among Southeast Asian photographers to get a picture of each of the world's 43 pitta species. The current record by one photographer is 37.

I watched while Wahyu and Ale set up a tall, narrow tent made of camouflage-print fabric. The back was wide open, and the front contained one horizontal slit. It was a single-occupancy bird blind. Ale invited me to sit on his folding stool and hold a walkie-talkie. He'd be waiting out of sight. I sat in there for over an hour, mosquitoes pricking my neck, sweat trickling off my nose, sleep creeping in, eyes pressed up to the slit.

My view from the bird blind.

Ale and Wahyu piped in occasionally over the radio. "Do you see any pitta?" came the crackly whisper.

"Not yet," I replied. As if I would've watched the thing without telling them!

"We wait!" they encouraged me. I was impressed by their patience. Personally, I was ready to accept that pittas live wonderful, happy, undocumented lives and get out of there, but I couldn't disappoint my devoted guides.

My miserable hour in the bird blind.

Suddenly, there was a flicker at the snag. A flash of feathers, a green rump, yes! It was the elegant pitta!

The elusive elegant pitta spent half a minute at his next, delivering a mouthful of insects to his chicks.

The thrill of that moment more than compensated for the sweaty, buggy hour in the blind. I was glad that Ale and Wahyu had encouraged me not to give up.

I also shot this short video. It shows the elegant pitta feeding its chicks (from behind). At the end, when the pitta flies away, you can get a look at the nest itself.

Usually, my policy is to observe and enjoy an organism before trying to get a photo. I know I miss a lot of pictures this way, but I would rather have an experience than a trophy. Isn't that what Google Images are for, after all? In this case, however, out of respect for the Singaporean competitors who fly all the way to Lombok for this one shot, I prioritized the photo. And it felt wrong. I spent only a few seconds actually seeing this bird, this father feeding his adolescent offspring in Wallace's jungle. The rest of the time, I saw him on the viewfinder screen of my camera. I felt like I was watching an episode of Planet Earth, and I can do that from home.

I was reminded that I am not a photographer at heart, but a naturalist. Then again, I'm glad for the photo. Otherwise, this blog entry would be a lot less fun to share with you all. :)

Ale and I wait for night to fall.

Now, with the pitta photo securely on my memory card, we had only one target left: Lombok's only endemic vertebrate, the Rinjani scops owl. While we waited for night to fall, Wahyu pulled out the camp stove again, and we enjoyed black tea, spicy red crackers, and bananas. Then, just as dusk set in, the owls arrived. Two shadowy figures glided overhead in the canopy. Ready with his spotlight, Ale called me over to get the perfect shot.

Rinjani scops owl.

"Did you get it?" he asked eagerly. "Did you get both eyes?" I was content just to watch the owls soar into their night, but I kept taking photos until I got a few of reasonable quality. As an opportunistic photographer, I get the occasional gem of a photo, but today I realized how much effort and patience a true photographer must have to never give up on a potential shot.

I'll throw in another, since I took so many photos!
I was amazed to learn that the Bahasa Indonesia word for owl is burung hantu, meaning ghost bird, because the same is true in Madagascar. The Malagasy word for barn owl is vorondolo, also meaning ghost bird. The original Malagasy people were seafarers from Indonesia, and many cultural traits have been carried over: terraced rice paddies, ancestor worship, outrigger canoes, and much of the language. I wonder if this similarity is due to convergent linguistic evolution, or founder effect?

By the end of the night, I was too exhausted to join Ale for dinner. And if you know me, that is saying something! I took a quick shower before hitting my rooftop hut's floor mat. I wonder if this is how Wallace felt after a long day of collecting? A blanket over wooden slats never felt so cozy.

Thursday, February 1, 2018

Reef Doctor: a Malagasy Model for Marine Healthcare

I walked barefoot on the sand littered with plastic bottles and fishing nets. To my left stretched a concrete wall, holding back past-their-prime hotels and half-finished houses from tumbling into the sea. To my right, the Mozambique Channel tickled the shore. Continental Africa lay beyond the horizon, but the curve of the earth had my eyes convinced this water might go on forever.

An outrigger canoe moored offshore from Ifaty Beach.

I’d been told to expect a forty-minute walk from my hostel in Mangily, a tourist town, to the Reef Doctor office in Ifaty, a sleepy fishing village. I can report that the timeline was optimistic. On the lower beach, I slurped through calf-deep quicksand. Higher up, I tiptoed across a gauntlet of razor-sharp crushed shells.

The fact that I stopped to photograph every shorebird probably didn't help my timeliness, either! This common ringed plover reminded me of a semipalmated plover with a stretched bill.

White-fronted plover. Another lifer, restricted to sub-Saharan Africa and Madagascar.

Ruddy turnstones in the wrack zone.

This shorebird (a black-bellied plover?) stands on a band of jagged coral bones, a remnant of Ranobe's old fringing reef that was gradually exposed over thousands of years by a shifting river delta. 

The whimbrel, a worldly traveller that breeds in the Arctic and migrates to South America, Africa, south Asia and Australia. (Sounds like a Watson year!)

A bit late and more than a bit sweaty, I arrived at Reef Doctor. It was hard to miss. The retaining wall on my left gave way to a compound of A-frame bungalows interspersed with salt-tolerant trees and hand-painted signs. A pile of rough boulders was labeled “Artificial Reef.” I assumed these rocks would become a future artificial reef, since they weren’t doing much to promote fish habitat up here on the sand. Two energetic volunteers sat cross-legged on the ground, painting an old wooden table with creosote.

The Reef Doctor campus was a beachfront village of yellow A-frames.

“Hi!” I called. “Is this Reef Doctor?”

“Yeah!” confirmed a cheery, tan woman.

“I’m looking for Seb,” I told her. I had been e-mailing with Reef Check’s director, Emma Gibbons, for weeks to set up this visit with the science officer, S├ębastien Boudry.

“Oh sure. SEB!” the woman hollered. She motioned to a thatch-roofed bungalow. “I think he’s in there.”

Soon, Seb appeared to guide me through the workings of this coral-reef conservation nonprofit. He wore a long, messy bun of beach hair and a bandage on his left foot from a bang up with some rock or coral. A pair of metallic blue sunglasses rode on his head, and his flip-flops kicked up sand as we strolled to the science bungalow.

If it weren't for this colorful sign, I might not have recognized this particular bungalow as an "office."

Here, Seb’s surfer aura gave way to the data-minded, detail-oriented persona his job requires of him. "If current trends continue, the world's coral reefs are expected to be gone by 2050," he told me as he flipped through a PowerPoint of carbon-emission graphs. Seb offered me three hours of his time and answered my battery of questions about the fleet of volunteers he manages.

Seb Boudry, science officer for Reef Doctor.

"Yeah, the volunteers used to input their own data, but we had a few too many errors," he said wistfully. "So that’s all me, now." He swept his gaze over the stacks of penciled datasheets and tangle of cords leading to his laptop. The sun-tanned surfer vibe evaporated as I imagined Seb’s eyes turning red after hours of combing through numbers, checking for errors, transcribing thousands of digits from one page to another. So much for the glory of tropical marine biology.

The crooked whiteboard used to organize Reef Doctor's dizzying roster of conservation activities.

May I draw your attention to the lower left corner of the whiteboard, where the "coral disease" survey caught my eye. All coral conservation is about organismal health on some level -- bleaching is an example of non-infectious, environmentally-triggered disease. But what interests me most are the infections: the tangle of microbe and alga and coral that mirrors our own human struggle against pathogens.

Founded in 2002 by two British men, Reef Doctor has focused on improving the social and biological resilience of the Bay of Ranobe. Reef Doctor draws no arbitrary boundaries between social and ecological wellbeing. In this southwestern corner of Madagascar, the two meld into one enormous sea of urgency. To get a feeling for the socioeconomic state of Ranobe, check out this snazzy infographic:

Credit: Reef Doctor.

This photo, taken out the window of a taxi-brousse, shows the desperately dry Fiherenena River that runs between Toliara and Ifaty. You can see three women walking across the parched riverbed carrying loads on their heads, perhaps clothes to wash or mangoes to sell. This desert region is constantly in a drought, but the situation is becoming dire as deforestation, overfishing, and climate change threaten the last available options for subsistence.

Reef Doctor's major accomplishments include providing primary-school teachers for the community, implementing marine education in public schools, returning 1100 captured marine turtles to the wild through a tag-and-release program, creating a Women's Association to provide training in arts and crafts manufacture, and building a coral nursery to shelter young coral recruits until they are large enough to be transplanted into the reef.

While I was visiting, Reef Doctor was just finishing its three-year Darwin Grant to initiate seaweed and sea cucumber aquaculture in eight villages, providing an alternative livelihood to overfishing. Finally, and most significantly, Reef Doctor helped establish two of the first community-managed marine reserves in Madagascar, both here in Ranobe: Massif des Roses and Ankarajalita.

Seb scattered a handful of dead coral skeletons across the table to showcase Rabobe's marine diversity. Like any animal, corals can be classified by genus and species, but scientists often find it more convenient to describe the coral's morphology. Pictured here are a massive coral (left), a branching coral (top), and a mushroom coral (the circular one), among others.

Branching corals in the genus Acropora are one of the most important reef-builders in Ranobe.

As Seb spoke, the list of projects Reef Doctor juggles grew unwieldy in my memory. How can one organization tackle so many things at once? I came to understand that Reef Doctor is fueled by the two key ingredients: people and money.

The magic of the Reef Doctor system is that the labor not only pays for itself, it pays for everything else, too. Reef Doctor hosts a rotating casts of volunteers (working for 3-12 weeks) and interns (2-6 months) who pay for the privilege of helping conserve the world's third-largest coral reef. In return, the volunteers and interns can be trained in scuba diving and marine research techniques, and they live among an international group of like-minded folks on the breathtaking Mozambique Channel. Apparently, it's a fair trade, because there is never a shortage of eager workers. I was impressed to learn that 60% of Reef Doctor's budget is paid directly by volunteer fees, while the other 40% is furnished by donations and grants.

Seb pulled out these two giant snail shells. On the left is the bull-mouth helmet (Cypraecassis rufa). On the right is the smaller yet heavier triton (Charonia sp.) Both snails are severely over-harvested for the souvenir market. In the year and three months since he arrived at Reef Doctor, Seb has seen only two bull-mouthed helmets and one triton alive in the ocean, but he's seen bucketfuls of their empty shells in the market.

In the middle of our conversation, Seb had to run out for a staff meeting. Triton shell still in hand, out of breath from his steady stream of information, Seb apologized with one flip-flopped foot out the door. "I'm really sorry I just have to talk with the staff because I'm in charge of all the volunteers and interns and I need to get ready for their meeting tomorrow I'll be back in twenty!"

That's how I found myself alone in the Science Office. I felt like a child slinking off from my great-aunt's Christmas party into the recesses of her big, unfamiliar house. What might an unattended ecologist like me discover, poking around an office like this? The corner bookshelf drew me in like a magnet.

Reef Doctor's library consists of four boards in the corner stocked with books, printed journal articles, and a hefty portion of rat poop.

The books in front were well-used but in good condition: a field guide to reef fishes of the Indian Ocean, a manual of bleaching-survey methods. I dug deeper. One shelf, I discovered, had been claimed by a rat: the books' pages had been gnawed into powder, and a cozy-looking (yet thankfully empty) nest was squeezed into the corner. I found a yellow and brittle Nature Conservancy pamphlet featuring a quote from Darwin I'd never before heard:

Deep in a stack of French tomes, I unearthed another reference to our own and only Darwin. It was a 1976 volume by a University of Illinois geologist, its canvas cover engraved with gold lettering: The Coral Reef Problem. I read the introduction:

"It is of great philosophical interest to recall that Darwin's theory of coral reef formation was derived in a pure deductive fashion aboard the Beagle while sailing along the west coast of South America, before Darwin had ever seen a true coral reef... Through the middle of the nineteenth century the coral reef problem had a glamour about it."

A hidden gem in the bowels of the Reef Doctor library.

I was struck by the gulf in perception between this author, writing in 1976, and today's coral researchers. Forty years ago, the Coral Reef Problem was a delightfully puzzling question of how coral reefs are formed. Today, pondering the ancient origins of the reef feels like a reckless luxury when the corals' future is grimly predictable. Our new coral reef problem is this: how can we coax this "most extraordinary of natural structures" to survive past the year 2050?

That first statistic Seb had thrown out surfaced in my mind. If current trends continue, the world's coral reefs are expected to be gone by 2050. I started the mental calculations. By that time, I will be 55 years old. Will I have kids? If so, they'll be teenagers. Will they get to see a reef before it's too late? They'll have to learn scuba diving young... Where will we go to see the world's last reef, a scrap of corals taking their dying breaths? Will it be a secret lagoon, off limits to tourism? Will the cost for diving that last reef skyrocket, as demand increases and supply constricts to zero?

A bowl of salted reef fish for sale on the main street of Mangily. Can you find the threadfin butterflyfish, the moray head, and several species of snake eel? Reef Doctor has worked with local communities and the tourism industry to develop open and closed fishing seasons for vulnerable species, but enforcement is out of their hands. Only FIMIHARA (the local fishermen's association) and the chronically-underfunded Ministry of Fisheries have the power of enforcement. I was offered out-of-season lobster and octopus every day at lunch.

One night, we bought fried fish for dinner on the street. Haja and Mahery taught me how to make street food safe by asking the vendor to re-fry to fish in boiling oil right before handing it to us. The fish vendor wrapped our hot, greasy fish in the only paper available: reused pages from her child's homework.

Of course, my diving concerns are negligible compared to the burden carried by coastal communities who depend on reef-based fisheries. It's just my way of conceptualizing a massive global change that's happening too quickly to believe. 2050? One lifetime after that Illinois geologist scratched his head about Darwin's theory of coral accretion, his Coral Reef Problem will no longer be available for experimentation. Like the color of the dinosaurs or the reason why our fishy ancestors crawled from the sea, it will be a question for paleontologists, to be answered by fossils of things that have ceased to live.

Before I knew it, the staff meeting was over, and Seb came back to find me as promised. I jumped when I heard the door creak open. It's always startling to be found when you're lost in a book. In our final minutes, I asked Seb how he maintains enthusiasm for his job as a reef doctor in the face of such a gloomy prognosis.

It was one of my first questions that gave Seb pause, if only for a moment.

"The 2050 thing, that's just a prediction," he started by clarifying. Three hours ago, Seb had asserted the 2050 expiration date with data-driven confidence. But that was Seb the Scientist. Now, I was speaking to a different persona, the conservationist, the coral-lover, the optimist whose hope is derived from within the scientist's margin of error. Yes, the data predicts that all the world's reefs will die by 2050 -- but what if the data are wrong? What if we can change the trend? What about that error bar?

"What I do," Seb continuted, "it try to slow it down, try to be positive. We know if nothing is done, it’s just going to die."

"Will this coral reef still be here, in Ranobe, in 2050?" I asked.

"I don't know. I hope yes," he said. "Maybe our generation will see the extinction of it, because it’s just going too fast.  But recently on the new reef, we saw the first humphead wrasse in ten years, so the water must still be clean enough for that. And the humpback whales are still coming. It means there is still some life, and it needs time to grow. That’s the problem, we haven’t given them time to grow. You never know what is going to happen."

Most of the Malagasy living in this region belong to the Vezo ethnic group. They are known for their perfected seafaring and fishing techniques which revolve around the pirogue, a wind-powered outrigger canoe similar to the ones that brought the first Indonesians to Madagascar 2,000 years ago. The sea is used for transportation because roads between villages can be rough or nonexistent. Here, a pirogue is weighted down with a load of tree trunks that will be used to construct houses.

A few hours later, I spotted the same bundle of logs loaded onto a taxi-brousse.

A few days after talking with Seb, I went diving on the outer rim of Ranobe’s fringing reef. My dive instructor, Anne Furp, asked if I’m certified to dive deep.

"Yeah, I'm an Advanced Diver. I can go to 100 feet," I told her.

“Good,” said Anne. “We only do deep dives here. Anything the fishermen can reach by freediving has already been destroyed.”

Tip for backpackers on a budget: search thrift stores for tight athletic leggings and a long-sleeved swim-shirt. It's a lot cheaper than a wetsuit.

Knowing about my love for microbes, Anne pointed out a massive, lavender mound of Porites coral with white rings circling several of its pores. I don’t know what pathogen was causing those white rings, but I noted that coral disease does not discriminate among depths. We saw a scaly crocodile fish, a marbled grouper as long as I am tall, angelfish, moray eels, and (my personal favorite) a healthy sea star.

A few days after that, I went snorkeling in the shallow section of Massif des Roses, the first community-managed marine reserve established by Reef Doctor.

The sun was shining as a wind-powered pirogue carried Haja, Mahery and me to our snorkel site.

It was Haja and Mahery's first time snorkeling! They have studied Madagascar's terrestrial plants and animals all their lives, but never had they seen their ocean's algae, corals, or fishes.

The difference between the deep dive and the shallow snorkel was heartbreaking. In two hours, I swam above a seafloor that was half garden and half graveyard. Spiny black Diadema sea urchins clustered in crevices, and a school of dark fish flashed by. One Acropora showed the purple fluorescence of new growth at its tips, and a lime-green Porites photosynthesized under our masks. These live corals were surrounded by rubble, the skeletal remains of their dead kin. Seb’s prediction that coral reefs will go extinct in our lifetime appeared to be coming true in front of my mask. One of the healthiest patches in Ranobe, Massif des Roses harbored life. Yet it was a ruin, an ecosystem drawing its last shaky breaths in the Intensive Care Unit of planet Earth.

Here is a GoPro video I made to document the condition of Massif des Roses and celebrate Haja and Mahery's inaugural snorkel.

Seb knows this bay will never be pristine, at least not for many generations. At best, Ranobe will become a fragmented habitat composed of a few hardy coral species, an artificial reef of boulders, and a rebar garden of transplanted coral recruits. Tourists will dive deep to glimpse the abundance of the past, while locals will scrape a living from the marine life that remains. Yet he, Emma, and all of Reef Doctor's staff and volunteers are moving toward something different, something alive. Rather than forsake this seafloor as a lost cause, they embrace its knotted web of relationships: with scientists and fishermen, pirogues carrying away forests into houses, drier summers, drier winters, climate and weather and carbon dioxide, fried fish in torn pages of lined paper, stinging plankton and crumbling calcium carbonate. The death within Ranobe is easy to see, but it is not complete. Life makes its way in this ruin: a school of snapper, a toothy eel, a jellyfish. The first humphead wrasse in ten years. Seb knows our survival is entangled with the survival of the reef. And for him, a sliver of uncertainty in his patient's prognosis is enough.