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Noé U. de la Sancha and Richard E. StraussDepartment of Biological Sciences
Texas Tech UniversitySWAN 2010
Cuáles son las consecuencias de deforestación actual?
Que pasara en el futuro?
H1: Poner a prueba la teoría de biogeografía de islas en los remanentes en Paraguay.
H2: Perdidas de especies es proporcional a perdida de área.
Grande
Varios juntos
Illustrations By: Noe de la Sancha
vs
vs
Aislado
Pequeño
Pequeños
Diversidad Alta
Tasas Altas de Reproducción.
Dispersión Limitada (Pires et al., 2002; Pardini, 2004; Umetsu and Pardini, 2007; Umetsu et al., 2008)
Sensibles a Deforestación
Data published studies from Brazil.
Similarity Analysis (PAST).
Regressions for patch size, trapping effort, and number spp (STATISTICA).
3D Plot for these to determine linear and quadratic/non-linear functions (STATISTICA).
Model for Brazilian data (STATISTICA).
Corrected Brazilian Model with Paraguay Data.
Paraguay Mammal Data (Field Data).
Improvement-of-fit Test of Quadratic Model Relative to Linear Model
Predicted No. Spp Paraguay GIS Data/Reduction Size (ArcGIS and Excel).
Bi-plot of Remnant size and number of spp (PAST).
PCA Spp Richness in different models (PAST).
Latitud y Longitud
Localidad
Identidad de Sitio
Tamaño Remanentes Elevación
Género y especie Numero de Individuos capturados or Presencia
Ausencia
Tamaño de la Especie
Cita
Esfuerzo de Muestreo
Scatterplot of No. Spp against Patch Size
r=0.38101
r=0.54412
Scatterplot of No. Spp against Trapnights
Scatterplot of No. Spp against Patch Size
r=0.38101
4 traps each station
24 stations per line
4 lines per grid
8 night of trapping
10 grids
30,720 trapnights/remnant
4 traps each station
24 stations per line
4 lines per grid
8 night of trapping
10 grids
30,720 trapnights/remnant
11x8x10= 880 pitfall trapnights
TOTAL= 31,600 per remnant
0
20
40
60
80
100
No.Individuals Limoy10,540 ha
02468
101214
No.Individuals Morombi24,748ha
0
5
10
15
No.Individuals Mbaracayu95,758 ha
0
10
20
30
40
50
60
70
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A. m
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G. a
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N. l
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No.Individual San Rafael70,000 ha
improvement-of-fit of the quadratic model relative to
the linear model,
improvement-of-fit of the quadratic model relative to
the linear model,
Improvement-of-fit Test of Quadratic Model Relative to Linear Model showed significant improvement of fit (p < 0.001).
46,437 patches
Linear Model Quadratic Model
2008 Data
1,000 10,000 20,000 31,600
2008
10%
25%
50%
75%
Quadratic/Non-Linear Model
PCA Estimated Spp Vs Reduced Patches
PC1 captures variation forest patch size.PC2 captures variation of predicted number of spps as a function of habitat loss.
11,000-20,999ha5000-10,999ha
1000-4999ha500-999ha<499ha
>70,000ha
Biogeografía de islas no se aplica a parches del este de Paraguay.
Remanentes mediano presentaron los números mas altos de spp.
Tamaño de remantes no es el mejor indiador de riqueza.
Numero de especies incrementa en remantes grandes cuando ser reducen de tamaño. (Anillos de Diversidad, generalistas, especies exoticas/invsoras).
Remanentes pequeños no fluctúan en numero de especies
Perdida de especies no es proporcional a perdida de area.
Suggestions!
Advice!
Acknowledge: Texas TechJorge Salazar-BravoRobert Baker and Heath GardnerTina DelaHuntyJane Bell
Hugo MantillaCarlitos Dick Nicte Ordonez Juan Pablo CarreraBryan ReeceDavid RodriguezFaisal AnwaraeliMolly and Adam FergusonRaquel MarchanJohn HartingCibeli CiaoLiz SilesBecky RoperTyla HolsombachMatt Campbell
All my current lab matesEvery member or Dr. Baker and Bradley’s lab for the past 6 years
Pat Moore
Richard StevensCelia Lopez Steve Presley
Lucy Aquino Robert Owen
Paraguayoite: Todos los voluntariosPastor PérezMaría Luisa (Malu) Ortiz Lourdes ValdezJulio TorresCarlos MolinaMario MaldonadoNatha MujicaFlavia NettoMirta Lopez
Fundacion Moises BertoniFreddy Ramirez Sixto Fernandez Myriam VelasquezRene PalaciosDon Tito Guardaparques Mbaracayu
Guyra ParaguayAlberto YanoskyOscar RodasPepe CartesGuardaparques San RafaelLeti Lopez
Reserva MorombiVictor VeraAbilio RamirezDerlis
Itaipu BinacionalNelson PerezGuardaparques Limoy
Special thanks to:John Zak Nancy McIntyreBruce PattersonGuillermo D’Elia
Funding:FulbrightMary Rice FoundationField MuseumLewis and Clark FoundationTTU Biological Department:Michelle Knapp AwardKnox Jones AwardDepartmental RAAmerican Society of Mammalogists
Mis Padres, Lalo, and Anais
Shaynita Harris
Muchas Gracias!!Questions, Answers, Comments