Population Size and Conservation Strategies for the ...€¦Population Size and Conservation Strategies for the Northeast Rufous Gnateater, a Threatened Subspecies of a Relictual Atlantic

Population Size and Conservation Strategies for the Northeast Rufous Gnateater, a Threatened

Subspecies of a Relictual Atlantic Forest

Ileyne Lopes Wesley Silva

Universidade Estadual de Campinas, UNICAMP - Brazil

Introduction and Justification

MYERS et al., 2000 The Atlantic forest is a Hotspot of biodiversity

Introduction and Justification

7.9 %

SOS MATA ATLÂNTICA e INPE, 2012

Introduction and Justification

But because of the pressure of deforestation has only of its original area

2000 to 2011 - 322 hectares deforested

SOS MATA ATLÂNTICA; INPE, 2012

Introduction and Justification

Recent data demonstrates that hreats remain high

MMA, 2003; MACHADO et al. 2008a,2008b

58% of the threatened species

Are endemic of the Atlantic Forest

Introduction and Justification

In Brazilian redlist

MMA, 2003; MACHADO et al. 2008a,2008b

Are endemic of the Atlantic Forest

Introduction and Justification

58% of the threatened species

The majority of them are birds

MMA, 2003; MACHADO et al. 2008a,2008b

Are endemic of the Atlantic Forest

80% are in the Northeast

Introduction and Justification

58% of the threatened species

Study Area

SOS MATA ATLÂNTICA; INPE, 2012

SOS MATA ATLÂNTICA; INPE, 2012

Study Area

SOS MATA ATLÂNTICA; INPE, 2012

Study Area

Baturité mountain

SOS MATA ATLÂNTICA; INPE, 2012

Study Area

Baturité mountain

Above 600 meters : Protected Area

14 threatened species ARKive

ARKive

Populational status of species Stablish conservation measures Empirical data insufficient

ARKive

BROOKS et al., 1999; MMA, 2003

Northeast Rufous Gnateater Conopophaga lineata cearae

Vulnerable

Endemic

Territorial and forest habits

Discover the size of the population of in the state of Ceará

Objective

Density Forest Area

Discover the size of the population of in the state of Ceará

Objective

Density Forest Area

Discover the size of the population of in the state of Ceará

Objective

Territories

Density Forest Area

Discover the size of the population of in the state of Ceará

Objective

Territories Mapping

Capture and banding

Colored bands

Mist nets ---> 30 days ---> Sep and Oct 2011

Defining territories

40 m

Grid ---> Spot mapping

Dec 2011 to Aug 2012

Defining territories

6 visits

Banded

Unbanded

Mapping the forest fragments

ArcGIS 10.1

30,000 hectares

2008

Quickbird images

Data analysis

Minimum convex polygon method (MCP)

Density (D) = Final study area

Population estimates = Density * Area of the fragment

Number of pairs in the sample

Results

Average territory

0.6 pairs/ hectare Density

3,641 m2

Standard error + 504 m2

Results

Each pair 1.6 hectares --->

T. caerulescens

P. leucoptera

D. mentalis

12,2 g 20,6 g 26,5 g

0,7 ha 1,0 ha 1,3 ha

DUCA et al., 2006; LIMA, 2008

24 g

1,6 ha

18 g

2,0 ha

C. lineata cearae

C. melanops

Thamnophilidae

Conopophagidae

13,736 hectares of forest

493 fragments

Cities

6 to 10 ha

11 to 50

51 to 100

101 to 500

501 to 1000

> 1000 ha

69

22

30

2

2

< 5 ha 318

50

64%

7%

Results

63 to 289

436; 508

760; 939

Less than 3 pairs of Gnateaters

15,000 individuals

SOS MATA ATLÂNTICA; INPE, 2012

Number of fragments Area Can hold

pairs

These are the representative areas for conservation according to:

Adding the “non representative” areas

The connection of the fragments gets much better

Discussion

Fragmentation context Population viability

Locomotion capacity

Permeabilidade da matriz

Discussion

Fragmentation context Population viability

Matrix permeability

Locomotion capacity

Discussion

Fragmentation context Population viability

Improving matrix permeability is a crucial conservation strategy

We expect that our results can influence the decision-making process to implement the permeability of the landscape through project of :

Planting seedlings

Agroforest systems

Environmental education of landowners

and their children

Environmental inspection

Good public policies

References:

BROOKS, T.; TOBIAS, J.; BALMFORD, A. Deforestation and bird extinctions in the Atlantic forest. Animal Conservation, v. 2, p. 211–222, 1999. DUCA, C.; GUERRA, T.J.; MARINI, M.A. Territory size of three Antbirds (Aves, Passeriformes) in an Atlantic Forest fragment in southeastern Brazil. Revista Brasileira de Zoologia, v. 23, n. 3, p. 692-698, 2006. IUCN. The IUCN Red List of Threatened Species. Version 2012.2 <http://www.iucnredlist.org>. 2012. KENDEIGH, S. C. Measurement of Bird Populations. Ecological Monographs, Illinois, v. 14, n. 1, p. 67-106, 1944. LIMA, A. M. X. Dinâmica populacional de aves de sub-bosque na Floresta Atlântica do Paraná. Dissertação de mestrado, UFPR, 2008. MACHADO, A. B. M.; DRUMMOND, G. M.; PAGLIA, A. P. (Eds.) Livro Vermelho da fauna brasileira ameaçada de extinção. Fundação Biodiversitas, MMA, Brasília, v. 1, 2008a. MACHADO, A. B. M.; DRUMMOND, G. M.; PAGLIA, A. P. (Eds.) Livro Vermelho da fauna brasileira ameaçada de extinção. Fundação Biodiversitas, MMA, Brasília, v. 2, 2008b. MYERS, N.; MITTERMEIER, R. A.; MITTERMEIER, C. G.; FONSECA, G. A. B.; KENT, J. Biodiversity hotspots for conservation priorities. Nature, v. 403, p. 853-858, 2000. SOS MATA ATLÂNTICA; INPE. Atlas dos remanescentes florestais da Mata Atlântica, período 2010 - 2011. Fundação SOS Mata Atlântica e Instituto Nacional de Pesquisas Espaciais, São Paulo, 2012. <http://www.sosma.org.br/5697/sos-mata-atlantica-e-inpe-divulgam-dados-do-atlas-dos-remanescentes-florestais-da-mata-atlantica-no-periodo-de-2010-a-2011/>. http://www.arkive.org/adelophryne/adelophryne-baturitensis/#src=portletV3api

Acknowledgments:

Thank you!!