Correspondence
www.ethnobotanyjournal.org/vol6/i1547-3465-06-023.pdf
Ethnobotany Research & Applications 6:023-028 (2008)
Campbell Plowden, Center for Amazon Community Ecology,
1637 B North Atherton St. #90, State College, PA 16803.
cplowden@comcast.net
permission can often lead one into the midst of a classic
Catch-22 situation.
One is not supposed to do research
without getting the proper authorizations, but it often feels
like one cannot provide sufficient information to get these
authorizations without making some contacts and doing
some research.
I approached this challenge by making a scoping trip to
Brazil in the spring of 1993. Working through the office
of the government Indian agency, National Foundation of
the Indian (FUNAI) in Belém, I arranged to visit several
villages in the northern section of the Alto Rio Guamá Indigenous
Reserve – the main homeland of the Tembé Indians.
Walking through the forest with their expert guides
further stimulated my desire to study NTFPs with an indigenous
group, but this did not seem the right place to
do it since their priority was finding help to expel illegal
loggers and colonists who were destroying their land. All
I could offer was a pledge to consider ways I might help.
At night, their foot stomping, maracá shaking, and resonant
voices chanting “Araruna” (blue macaw) burrowed
into my psyche. When I went home, the rhythm played
Challenges and Lessons
Studying Non-timber Forest
Products with Traditional
Communities in the Amazon
Campbell Plowden
Travel Log
Introduction
Learning how to do publishable quality scientific work is
not easy under any circumstances; learning how to do it
in a different culture, language and environment makes
the learning curve even steeper. While it is perhaps understandable
that researchers try to publish only the successful
parts of their work in scientific journals, this process
filters out important stories about non-scientific challenges
and failures. My experiences studying non-timber
forest products (NTFPs) with the Tembé Indians and other
people in the Amazon have taught me many things that
I could not condense into any conventional paper. I will
present some of these thoughts here in the hope they
might be valuable to other researchers.
Getting Started
After working on the political side of tropical forest conservation
for five years, I wanted to find a way to make a
difference working directly in the Amazon rainforest. The
problems of deforestation were well known, but practical
solutions to address them at the local level were elusive.
One promising strategy being tried in Brazil was assisting
rubber tappers to sustainably harvest and sell other nontimber
forest products (NTFPs). While indigenous people
were widely recognized as the masters of knowledge
about using plants for food, medicine and other purposes,
few efforts were aimed at helping them use their expertise
to improve their livelihoods and strengthen conservation.
As I contemplated a dissertation topic, I most wanted to
conduct a study on the ecology, management and marketing
of NTFPs with an indigenous group in the Brazilian
Amazon.
One of the primary official challenges of doing scientific
research in many tropical countries is obtaining the necessary
authorizations to gather data from human communities
and to collect biological specimens. Obtaining this
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over and over in my head as I struggled to remember its
proper lyrics.
My relationship with the Tembé took a big step forward in
1996 when I helped host a young leader to do a speaking
tour in the U.S. He liked my ideas for studying NTFPs
and invited me to his village on the Gurupi River in the
southern end of the reserve. Unlike the part of the reserve
I had first visited, this region still had bountiful intact forests.
His people were, however, keen on finding ways to
increase local income through sustainable use of their forest
resources. I spent six weeks in Tekohaw village that
summer doing a pilot study of copaiba oleoresin production
that marked my honeymoon period with the group. I
spent most of my time in the forest with four or five elders
whose intimate knowledge of medicinal plants, bird calls,
and trails was every bit as impressive as any group I had
read about. The prospects for harvesting copaiba in this
area as a new economic resource were not promising, but
our partnership felt good, and we were enthusiastic about
exploring other products in the future. The day before I
left, the chief took me on a bit of a “real estate” tour of the
village, and we agreed that the village would renovate an
abandoned house for my family when we came the following
year. The other important accomplishment of this summer
was finding a professor at the agricultural university
in Belém to serve as my scientific counterpart for the research
visa I would need to launch a longer term study.
Going this next step wasn’t so easy. Although my summer
trip had given me ample information to formulate a
good proposal, establish a good relationship with a host
community and obtain academic sponsor, the process to
secure the research visa was arduous. The application required
approval by the National Council of Scientific Development
and Technology (CNPq), the Brazilian Institute
of Environment and Renewable Natural Resources
(IBAMA), FUNAI, three independent scientists, and the
Minister of Technology. This took “only” nine months because
I spent hundreds of dollars in phone calls to Brasília
pleading with various officials to move my application on
to the next person. Due to concerns about biopiracy, Brazil’s
conditions for doing research concerning biodiversity
have become even more stringent since my visa was approved
in 1997.
I am now working in Peru where research visas are not required,
but the natural resource agency, National Institute
of Natural Resources (INRENA) does require separate
permits to collect and to export plant and animal specimens.
Getting the collection permit was very efficient, but
exacting requirements to export specimens has left me
unable to have my samples examined by taxonomic experts
for two years. Great patience and persistence are
needed to deal with these challenges.
Trying To Stay Healthy In The Jungle
The most important thing I neglected to bring with me into
the field on my first trip to the Amazon was a blanket. Shivering
in my hammock for several nights with nothing but
a borrowed thin sheet wrapped around me was a lesson I
didn’t need to learn twice. During my stay with the Tembé
in the summer of 1996, I discovered the next important
lesson about jungle living. Mosquito bites are annoying,
but generally fade away if left alone. Biting flies, however,
generated welts that itched so intensely and for so long
that I scratched them until they were bloody. My failure
to adequately clean these wounds led to them becoming
infected with a Staphylococcus bacteria. By the time I left
the reserve I had badly swollen ankles and a low grade
fever that needed strong antibiotics to treat.
Before my family left for a year of living in the field, we
got every immunization required or recommended and
brought a small pharmacy’s worth of prescription and
over-the-counter drugs with us. I rubbed andiroba oil as
a natural insect repellent on exposed parts of my skin every
day before going into the forest. My family’s most well
read book during our time in the village was “Where There
is No Doctor” (Werner et al. 1992). We drank only water
that had passed through our ceramic filter and adopted
an evening first aid ritual of treating each others’ bites and
scrapes with alcohol, Mercurochrome, and antibiotic ointment.
We kept mosquitoes at bay at night by surrounding
our hammocks with netting, and when chiggers slipped
through the fine mesh we liberally rubbed our bellies with
calamine lotion and hydrocortisone cream.
Tembé neighbors showed us how to pluck burrowing fleas
from tender toe areas with an orange tree spine before
they festered. One day my wife and daughter removed
several hundred tiny ticks from my body after I had unknowingly
stumbled into a nest of them in the forest. Other
nasty encounters with invertebrates included wasp stings,
ant bites, and accidentally squishing a venomous hairy
caterpillar on my arm. Tall rubber boots saved my field
crew and me several times from poisonous snake bites,
and I felt fortunate not to get malaria when many others in
the village did. My body was not always strong enough or
well adapted to the environment, though, and I periodically
got sick with a fever or malaise of unknown origin that
caused me to miss days in the field. I left the village for
a whole month once when bad headaches and joint pain
became an unrelenting part of my day. After a battery of
blood tests in Brazil and the U.S., an infectious disease
specialist could only speculate that I had an exotic arbovirus
with no known treatment. I finally recuperated after
a few months at home with a regime of a cleansing diet,
herbal supplements to fight parasites and strengthen my
immune system, and regular sessions of yoga and visits
to a holistic chiropractor. I loved this field work as much
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with Traditional Communities in the Amazon
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25
as anything I’ve ever done, but taking care of my health in
this climate required a lot of vigilance.
Logistics, Communication
and Technical Challenges
Doing research in primary tropical forests almost by definition
requires working in remote places because most
places that are easy to get to have been significantly altered.
Traveling from Belém to my field site at Tekohaw
was almost always a saga. Scheduling a trip to the reserve
took two days to two weeks. It usually began with
a four hour bus ride from the city to a town by the Gurupi
River. We then usually spent one or two nights in a rickety
store room until a boat arrived and was provisioned before
returning upriver. The trip to Tekohaw could take as few as
six hours in an open motorboat if the engine didn’t conk
out. One trip from the village downriver took four hours
longer because our gasoline ran out. We finally reached
the town at night after paddling the last three hours with a
bowl. Going by covered motor launch kept one dry during
the rainy season, but it meant spending 12 to 24 hours in
transit with the constant noise and fumes of a diesel engine.
Travel during the dry season was particularly tricky
since boats had to navigate through rocky rapids. Several
boats capsized in the process. Tekohaw eventually built
its own airstrip, but chartering a private plane for this one
hour trip costs about $800, so I took whatever boat was
available and did my best to protect equipment for whatever
might happen on the way. A road has now been built
to the village. This has made it easier for both Indians and
illegal loggers to come and go through the reserve.
Once I made it into the village, it was not easy to communicate
with anyone outside it. The life line of Tekohaw
to other villages and FUNAI is a ham radio. Leaders
checked in with each other daily to share news, pass
along requests for transportation, and arrange meetings.
Once a month or so I could send out a letter with someone
going to the city or receive mail brought in by the FUNAI
agent. I looked into satellite phones but the licensing
procedure and costs were prohibitive. After my family
had gone home during my second year in the reserve, I
periodically listened to British Broadcasting Corporation
(BBC) International on a short-wave radio, but once I was
in the reserve I pretty much had to accept that I was not
going to communicate with the rest of the world for six to
eight weeks. It was relaxing in many ways to be relieved
of the daily burden of violence in the world, but the isolation
from my family became increasingly hard.
My brand of ecological field work fortunately did not need
a lot of sophisticated equipment. I brought standard 50
meter measuring tapes, tree diameter tapes, compasses,
tree tags and Global Positioning System (GPS) units from
the U.S., and I easily got basic tools like machetes, hammers,
drills in Belém hardware stores. Accidental machete
cuts through measuring tapes were remedied with duct
tape. Setting up my house as a laboratory and office that
could function at night was a bigger challenge. My unbreakable
solar panels worked flawlessly for years, but I
went through three expensive car batteries before I finally
worked out (with the help of a digital voltmeter) how to
budget my energy consumption for a couple of compact
fluorescent light bulbs, a laptop computer and portable
printer. I did without the computer for the first few months
since its screen was damaged in the first boat trip to the
reserve, but once it was repaired, it became a vital tool for
creating data collection sheets, entering data, and writing
reports in the field. Documenting my work, life in the village
and critters in the jungle with cameras was a great
pleasure, but there are even fungi in the humid forest that
eat and etch their way through the plastic coating on lenses.
Keeping electronic gear in dry bags with silica desiccant
became an essential practice in later trips.
Blending Indigenous Knowledge
With Scientific Inquiry
I intentionally wanted to study NTFPs with indigenous
people because I believed that I could learn a lot more
about these plants working with people who were familiar
with them than if I simply set off with a tape measure
into a pristine area of forest by myself. It took less than a
few days to confirm that my Tembé colleagues knew more
about the forest they had grown up in than I could learn
in my lifetime, but I was eager to learn as much with them
as I could. It took a good bit longer to realize that their understanding
and beliefs did not always translate well into
my desire to assign numerical values to some things or
describe natural history relationships in western biological
terms. One lesson was learning how to gauge the response
to a question about the abundance of a particular
plant or how much product it typically yielded. Beginning
with the copaiba work, the Tembé elders I first worked
with assured me that we would find lots of trees and told
me about times when they had filled large cans with oleoresin.
It was rather sobering to them and me when it took
several weeks of daily searching to find just 50 trees and
that we only gathered a few liters of oleoresin from drilling
most of them.
Another lesson I learned working in the villages was that
the level of skills and knowledge varied dramatically between
individuals. Some people were very adept at finding
certain kinds of trees, but not others. Elders could generally
identify hundreds of types of trees but were unable to
read, write or count higher than ten. Younger men generally
recognized fewer trees than the elders, but a few were
quick to learn how to read instruments and reliably record
the measurements on data sheets. Research teams for
any given NTFP almost always had people with a blend of
these skills, so the research could provide opportunities
for cross-generational learning and appreciation.
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When I started asking about “breu” (pronounced brayyoo)
resin, Tembé collectors told me about the “tapuru”
(larvae) they found in the lumps and related stories about
filling entire sacks of resin from single trees. As the research
progressed, it became apparent that the Indians’
observation of the “tapuru” was fundamental to the resin’s
formation, and we proceeded to probe this relationship in
great detail. On the harvest side, it again became apparent
that the huge yields people described were the result of
their best days, not their normal ones. This reinforced the
recommendation by Grimes et al. (1994) that estimates of
NTFP harvest amounts obtained through ethnobotanical
inquiry be followed up with actual production studies in order
to develop reliable quantitative estimates.
The most culturally challenging situation I confronted related
to work in the field involved the regeneration of titica
vine roots. One Tembé elder told me that the slender
titica vines climbing some host trees were a different kind
of vine than the ones whose aerial roots were harvested.
Other Tembé told me that these aerial roots were created
when the legs of certain dead ants become elongated.
I was skeptical about the Indian version of titica regeneration,
but I tried to keep an open mind and wondered
if ants might play some role in the germination of titica
seeds in the canopy. I later found out that many Amazon
groups make a connection between dead ant legs and
vine regeneration. What they have probably observed are
the hyphae of a Cordyceps fungus that have emerged
from ants they have infected and killed. These hyphae
do bear a resemblance to the anchor roots on the stems
of young climbing titica vines. When I harvested several
whole plants at a different site, it was apparent that its diminutive
fruits were well hidden from view on the ground.
I regret that I did not harvest some plants with the Tembé
since these could have provided a concrete example to
discuss what I felt awkward saying based on book knowledge.
Native lore is an important part of a group’s culture,
but I do believe that harvesters who understand a vulnerable
plant’s regeneration will be better able to regulate its
harvest to preserve the resource for the future.
Expectations Of A Researcher
Working with the Tembé provided me an opportunity to
learn about the forest in ways I never could have done
on my own and gave me some of the best and worst experiences
of my life. Many of these successes and disappointments
relate to the fact that my relationship with
the community went far beyond my role as a researcher
studying NTFPs. As mentioned earlier, my initial contact
with Tembé from the Gurupi River villages occurred in
the U.S. when I escorted a leader on a 10-day long tour
of the U.S. that gave him many opportunities to discuss
his people’s needs in the areas of health care, education
and land rights. I was welcomed to Tekohaw not just as
someone who would study the economic potential of a
few plants but as someone who would be an active participant
in many aspects of village life and concerns. For
the better part of four years, I was known to everyone in
the community as “Zui’zu” (white frog). I was determined
not to be another scientist who came into the community,
gathered whatever data and materials he wanted and left
without giving much in return.
I tried to help direct resources to the Tembé community in
various ways. I was very grateful to the members of State
College Friends Meeting and its Tembé Indian Support
Committee for their tremendous assistance in this area.
This committee secured several large donations and did
fundraising projects that included: young children making
and selling buttons they made with Indian designs, older
children making dinner and offering babysitting services,
and all children selling flower bulbs. I bought and traded
for Tembé handicrafts in the village and sold them at the
Friends Meeting and at slide shows I did about the Tembé
in the United States (U.S.). I arranged for a Tembé leader
from Canindé village to attend an Amazonian indigenous
conference in New York and recruited five people from the
U.S. to attend a traditional festival in the reserve in return
for a donation to the community. I obtained donations of
clothing, hand tools, medical and school supplies, soccer
balls and sports equipment for six Indian villages along
the Gurupi River. Funds raised in these projects were
used to finish construction of a large wooden launch, buy
a new motorboat and diesel engine, repair two gasoline
engines, produce a book of 200 traditional Tembé chants
in Tembé and Portuguese, finance a land rights project
and complete a cultural house.
While living in the village I tried to contribute to the community
by bringing in fish hooks, fishing line and ammunition
for trade. I loaned out my tools, fixed broken water
pipes, tended sick children, took family photos, and
gave evening classes in math, geography, science, and
environmental advocacy. When I left the village I gave my
solar panels, furniture and remaining first aid and paper
supplies to the schools and infirmaries of three different
villages.
Trying to get my research done and be a good employer
presented many challenges. The first summer in Tekohaw
the elder Tembé worked with me without formal
wages, but at the end of the summer they each made a
list of items they wanted from the city in compensation for
their time. I initially liked this system because it felt more
like a cooperative venture than a business arrangement,
but it was not fair because a few people who worked little
wanted more than others whose daily efforts were integral
to the project. When I returned in 1997 I paid everybody
who worked with me the same amount for each day they
worked and raised this amount every year. This system in
general worked well, but there was social pressure to hire
as many people as possible. This was difficult because
my funds were limited, and I mostly needed people who
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with Traditional Communities in the Amazon
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27
either knew forest trees very well, could read and write
numbers well or both. At one point I created a special project
to measure manioc productivity more as a way of paying
some extra people than because the information was
vital to my research goals.
I strove for an elusive balance between firmness and flexibility
in dealing with research needs versus other needs
of the village and my helpers. I got very little work done
in the fall of 1997 because most men were away from the
village cutting boundary lines for the reserve. Shortly after
they came back they all got engaged in the 10-day long
St. Benedict’s Festival. I had to plead with the community
to release a few people to me or I would not be able to
accomplish anything. A year and a half later the situation
was reversed. I sometimes had four crews of people going
out on the same day to get production data on andiroba,
breu, amapá and copaiba. It seemed wonderful until
the chief came to me and asked me to release some of
these men so they could work on the community garden
and building projects. It became apparent that while many
people appreciated the opportunity to work, the community
was suffering because their desire to do work for the
community for free had begun to wane. Some of these
people at least willingly made donations to a travel fund
for the leader when there was an important meeting for
him to attend in Belém or Brasília.
Taking on such a broad range of research topics had other
consequences for my work and relationships. By trying
to gather production data about so many plants during a
two-year period, I inevitably sacrificed gaining a deeper
understanding of a few of them. Over time, I became more
of a field manager than an ecologist building my insights
through daily observations in the field. Part of this seemed
unavoidable since there were many days when I felt too
weak or sick to go in the forest, but this mode gradually
altered my relationship with my Tembé field assistants. I
knew next to nothing about the forest, but when I faced the
mud, bugs, poisonous snakes, rain and shared one can of
sardines with them for lunch I initially earned their respect.
When I stayed in the village more often during the day, I
had fewer chances to personally share their successes
and travails in the forest. My interactions with them became
more focused on checking data sheets and paying
their wages. Our relationship had uncomfortably shifted
from partners and friends to employer and employees.
By the end of 1999, it was clear that the expectations the
community had of me were more than I could meet. By
hiring people from one family in Tekohaw, other families
sometimes felt slighted if I did not hire someone from
theirs. Since I lived in Tekohaw it was natural that I hired
mostly people from there and provided other types of assistance
to that community. This made some people in the
other Tembé villages upset that I was not paying more attention
to them. Since my field work was carried out exclusively
in Tembé villages and fundraising projects brought
benefits mostly to them, the Ka’apor Indian villages on the
other side of the Gurupi River began to feel increasingly
angry that I was unjustly ignoring them. I was aware that
such feelings could arise and tried to deal with it by hiring
representatives from several villages to work in projects at
Tekohaw, but it was difficult for people with families to stay
away from their home villages for long. I did one well-received
side project in Cajueira village, but it was not possible
to do so in others without fracturing ongoing research
at Tekohaw. Boats and boat equipment were theoretically
used by all of the villages, but over time, each village
wanted their own craft. I tried to channel funds earmarked
for a land right’s project to a committee of village leaders,
but the delay in releasing funds due to inter-village politics
led to recriminations against me by individual villages who
wanted me to release the funds directly to them.
I did one round of visits to all of the Gurupi villages to
explain the goals of the research project and did regular
updates at Tekohaw. It was evident, however, that even
at Tekohaw the level of understanding of all of these studies
was not very high. The simplest explanation was that I
was studying plants that might lead to additional sources
of income, and I used the most creative ways I could think
of to convey quantitative concepts to people who knew little
or no math. When the research began to show that the
new products being investigated were not very promising
in this respect, it became harder to explain to most people
why continuing such studies were still important or relevant
to them. Information on some study trees was lost because
people removed numbered tags or harvested trees
for themselves in between research harvests. Some people
who worked with me took a genuine interest in probing
topics like the relationship between the breu resin and the
weevil larvae that lived in it, but many young men worked
with me mostly because it was a relatively easy and interesting
way to make some money. My family was warmly
embraced, but I believe most of the village accepted me
as a friendly foreigner with quirky interests and were content
with my presence as long as I provided some tangible
benefits to the community on a regular basis. The increasing
interest that people had in making money seemed to
fuel speculation that I hoped to get rich taking photos, recording
chants and collecting plants around the village.
These issues were periodically discussed, but it became
increasingly difficult to work without unspoken suspicions
and jealousies clouding many interactions. By the time I
returned to Brazil in the spring of 2000 to wrap-up field
work for my dissertation and to present some preliminary
research results, the cord of trust between several villages
and me had badly frayed. I left with my head high but
a very heavy heart.
Indigenous people have an understandable expectation
that researchers they welcome to their communities will
carry out their work with full consultation, conduct themselves
with integrity and fairly compensate people who
work with them and the villages that host them. These
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were my expectations going into this project, but it is apparent
I needed to communicate more openly and realistically
about these subjects more often. My dialogue
with leaders sometimes worked and sometimes did not
because I had to operate in the context of intra- and intervillage
politics that were often beyond my understanding
or control. I could speak Portuguese well enough to do my
work in the forest and conduct daily life in the village, but
at times I was simply unable to communicate effectively
about complex and sometimes volatile emotional and cultural
issues because I couldn’t use my native language.
I admit that for a time I enjoyed the feeling that I could do
fascinating work in the forest and make contributions to
the community in so many ways. The needs of the people
seemed deep and diverse, and they stimulated creative
energies to help however I could. Trying to be a researcher,
medic, teacher, employer, banker, fundraiser,
archivist, handicraft buyer, hardware supplier, father and
husband were too many roles to keep up for the long haul.
My inability to balance these roles led me to make mistakes
that hurt my relationship with some members of the
community. The cumulative weight of these roles almost
stretched the patience of my family and my health to their
breaking points.
The issue that I will ponder long and hard as a result of my
time with the Tembé is the role of money in the community.
I was initially attracted to studying the economic potential
of NTFPs because I thought that increasing revenue
would help the community to improve health care, education
and support forest protection. Over time these beliefs
were strained or vanished. Most people wanted “modern”
medicines because they had lost some of the knowledge
or faith to use rainforest plants, but they didn’t want to
spend their money on these things because they expected
the government to supply them. The Tembé wanted
to have Tembé teachers in their schools, but they consistently
failed to honor commitments to compensate the local
people who devoted long hours to teaching the village
children. Young leaders were unanimously praised for
their efforts to defend their land rights, but raising donations
from the community to send these people to important
meetings was a perennial struggle. People had not
abandoned their desire to help the welfare of their community,
but they clearly chose to spend most or all of what
little money they made on material goods for their family.
The appeal of cooking food with a clean flame from a
gas stove instead of cutting fire wood, making charcoal
and living in a soot-filled house is obvious. People needed
cash to purchase certain foods and materials like salt and
fish hooks to survive. Given my affluence as a middleclass
American, it would be hypocritical to criticize anyone
for wanting a new shirt or CD player, but I left with no illusions
that increasing village income would necessarily improve
Tembé health and education, preserve its traditional
culture or save its forest. Money can sometimes play a
vital role in supporting such objectives, but mechanisms
need to be in place in the community to handle such funds
in a constructive way. My feeling was that the struggle to
accomplish these goals was being waged from people’s
hearts and didn’t depend on how much money they had
or the size of their radio.
When I returned to Brazil in 2004, I was sad to hear from
various Tembé friends that illegal logging had spread to
the southern part of the reserve and that some leaders
had supposedly begun to accept payments from the loggers
to keep quiet. Although other leaders vigorously opposed
this collusion, it wouldn’t be surprising if some had
decided to seek some profit from these activities since the
government had consistently shown they were unwilling
or unable to keep the loggers out.
In spite of these challenges, I am beginning to work with
other communities in the Amazon now through my work
with the Center for Amazon Community Ecology. I even
hope I re-establish enough trust to work with the Tembé
again. I believe there is an important role that researchers
can play in working with local communities to promote
forest conservation and support rural community development.
Researchers can continue to study the complexities
of nature and help develop ways for people to coexist with
the full diversity of a tropical ecosystem in a world where
social and economic conditions are rapidly changing. Doing
so will take a lot of patience, perseverance, commitment
and humility.
Literature Cited
Grimes, A., S. Loomis, P. Jahnige, M. Burnham, K. Onthank,
R. Alarcón, W. P. Cuenca, C. C. Martinez, D. Neill,
M. Balick, B. Bennett, & R. Mendelsohn. 1994. Valuing
the Rain Forest: The economic value of nontimber forest
products in Ecuador. Ambio 23(7):405-410.
Plowden, C. 2001. The ecology, management and marketing
of non-timber forest products in the Alto Rio Guamá
Indigenous Reserve (eastern Brazilian Amazon). Ph.D.
dissertation, Pennsylvania State University. University
Park, PA.
Werner, David, C. Thuman, & J. Maxwell. 1992. Where
There is No Doctor: A Village Health Care Handbook.
Hesperian Foundation, Berkeley, CA.
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