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.

www.ipmworld.umn.edu/ chapters/ecology.htm

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

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10

20

30

40

50

60

70

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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