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Long-term
bird monitoring project begins
Gathering data on avian populations in
agricultural landscapes
By
Rachelle De Clerck
A
new project to monitor resident and migratory bird species is underway on
the 1,000-hectare CATIE farm, which project researchers say is an ideal
site for a monitoring station to collect long-term data on bird
populations within landscapes dominated by agricultural systems.
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CATIE
is centrally located within an agricultural landscape consisting
predominantly of coffee, sugar cane and pasture. Multiple stations have
been set up to monitor birds in various types of land use, with little
travel time required between them. Land uses currently being monitored
include: 1) living fences, 2) coffee agroforestry, 3) sugar cane, 4) cacao
agroforestry, 5) forests and 6) abandoned coffee. CATIE lies within the
Volcán Turrialba Biological Corridor that forms part of the Mesoamerican
Biological Corridor (MBC).
The
research project team includes Dr. Fabrice De Clerck, landscape ecologist;
Alejandra Martinez Salinas, ornithologist and ecologist; and Rachelle De
Clerck, environmental education specialist and biologist.
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Data
collected during the monitoring program will be critical for understanding
the long-term changes in bird populations, both for resident and migratory
species, as well as to understanding how land-use change may affect avian
communities. To date, most research has focused on how avian communities
are affected by the loss of forest, with little research on how changes in
land-use practices affect bird conservation. For example, a recent CATIE
study has found that coffee agroforestry systems, which are biodiversity
friendly, are rapidly being converted to sugar cane plantations as farmers
speculate on an increase in ethanol market prices. Long-term bird
monitoring of sugar cane and coffee agroforestry systems within the CATIE
farm will provide data necessary for understanding the impact of this
change on bird conservation. |
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This
project also has a global perspective through coordination with the
Institute for Bird Populations (IBP) to ensure that data contributes to a
larger network of monitoring stations.
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The
CATIE stations aim to protect migratory and resident birds through the
generation of knowledge about body condition and use of habitat in
different land uses within the CATIE farm. These stations will be
incorporated into the Monitoring Overwintering Survival (MoSI) program,
which is an initiative of the IBP in Point Reyes, Calif. This institute has been conducting research on avian productivity survival
throughout the United States since 1989. Based on the information
generated by this work and others like the BBC (North American Breeding
Bird Survey), it is obvious that in spite of all conservation efforts
conducted in North America, populations of several migratory bird species
are still declining due to adverse conditions in their winter grounds. The
awareness of this decline led to creation of the MoSI program, which is
a cooperative effort among public agencies, private organizations and
independent bird banders in Mexico, Central America and the Caribbean, to better understand spatial- and habitat-related variation in the
overwintering physical condition and survivorship of migratory land birds.
To achieve this goal, MoSI relies on data collected between November and
March at a network of standardized mist netting and banding stations
across the wintering ranges of these species (MoSI Protocol 2007).
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Besides being a part of the MoSI program, yearlong monitoring stations will
be maintained to generate information about resident birds, their presence
and absence, abundance, and body condition in different land uses.
Establishing the differences in habitat use by resident birds due to land-use
conversion of coffee to sugar cane plantations in the Turrialba region is
of particular interest. There is very little known about species abundance
and usage of these types of agricultural crops, and it is imperative that
we learn how these changes affect the bird species that breed and reside
in these areas.
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This project focuses on not only on obtaining bird conservation data but
also disseminating information through environmental education and
training of local and international volunteers on bird monitoring and
conservation techniques. These aspects are critical for creating a
conservation network in the Mesoamerican corridor while complementing the
conservation and protection efforts of neotropical migrants and resident
bird species.
The project has already begun to train volunteers in setting up mist nets,
safe removal of birds from the nets, identification and handling of the
different species and processing of individual birds. If you would to
participate, please contact the project.
More information
Rachelle De Clerck
E-mail: rivergecko@mac.com
Fabrice De Clerck
Telephone:
(506) 558-2596
E-mail:
fdeclerck@catie.ac.cr
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