distribution of endemic mammals in the peruvian yungas heidi quintana & victor pacheco museo de...
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DISTRIBUTION OF ENDEMIC MAMMALS IN THE PERUVIAN YUNGAS
Heidi Quintana & Victor Pacheco
MUSEO DE HISTORIA NATURALUNIVERSIDAD NACIONAL MAYOR DE SAN MARCOS
LIMA - PERU
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PERU
The territory of Peru covers 1,285,256 km².It neighbors Ecuador and Colombia to the north, Brazil to the east, Bolivia to the southeast, Chile to the south, and the Pacific Ocean to the west.
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Extension: 15 000 000 haExtension: 15 000 000 ha
PERUVIAN YUNGAS
Characteristics:The complex geology of the Andes has generated a landscape rich in biodiversity, endemism and unique ecosystems
Elevation: 800 – 3600 mElevation: 800 – 3600 m
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MAMMALS
Eco region Diversity Endemic sp. %
Oceanic 35 0 0BT Pacific 58 0 0BS Ecuatorial 60 2 3.4Desert 54 6 10.2S. Esteparia 72 12 20.3Paramo 23 4 6.8Puna 60 8 13.6Yungas 210 37 62.7Rainforest 286 13 22Sabana 60 1 1.7
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Endemism by Orders
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METHODS
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ORDERS SPECIES
Rodentia 29
Chiroptera 4
Primates 3
Artiodactyla 1
Cingulata 1
Didelphimorphia 1
Paucituberculata 1
40
Endemic Species
7
TYPE A
TYPE B
TYPE C
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Habitat-Geographic Barriers
Endemic Species
LANDSCAPE
ECOLOGICAL FACTORS
Species Data RECORDS
Tools
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Polygons elaboration
Compilation of Species
Information (literature,
museum records &
observations)
Polygons = Probable
Distribution
Create DataBase
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TYPE A: POLYGONS
Polygon around the species records
Arc View 3
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TYPE B: DEDUCTIVE MODEL
Species records Altitudinal
ranges –
Digital
Elevation
Model (DEM) North and South
limits Arc View 3
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TYPE C: INDUCTIVE MODEL
Environmental variables layer
Elevation MODIS Arc View 3 Maxent
(a statistical mechanics approach)
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Bio2 (Mean Temperature Diurnal Range)
Bio3 (Isothermality)
Bio13 (Precipitation of Wettest Month)
Bio14 (Precipitation of Driest Month)
Bio15 (Precipitation Seasonality)
Elevation
Slope
Topographic exposure
Percent tree cover*
Evi_pca1_5*: Principal component axis 1 of temporal MODIS EVI data
Evi_pca2_5*: Principal component axis 2 of temporal MODIS EVI data
VARIABLES
*summarized within 5 km moving window
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RESULTS
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Distribution along the Yungas
DEPRESION DE HUANCABAMBA
DEPARTMENTS LIMITS
Akodon aerosus
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Distribution centered in the North
DEPRESION DE HUANCABAMBA
HUALLAGA RIVER
Akodon orophilus
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PERENE RIVER
INAMBARI RIVER
Oecomys phaeotis
Central Distribution
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INAMBARI RIVER
DEPARTMENT LIMIT
Distribution centered in the South
Akodon kofordi
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Sturnira nana
Punctual Distribution
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TAMBO RIVER
DEPARTMENT LIMIT
Carollia manu
Exceptions:
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Gracilinanus aceramarcae
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Gracilinanus aceramarcae
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PRIORITY AREAS
Deductive Model
•Yungas Centrales de Bolivia
Inductive model
•Norwest of Huánuco
Above Inambari River
•Cordillera occidental de Vilcabamba
•Cordillera de Paucartambo
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The species distribution model allows us to minimize errors by collecting specimens nearer to the roads and rivers.
Identify the remote natural areas in which it is likely that a species is located, based on the characteristics that they share with previously sampled sites.
The polygons around the points don’t provide the necessary precision for regional conservation in Peru.
CONCLUSIONS