Jorge Cunha*2 e Francisco Rego**
*Técnico Superior
FORESTIS – Associação Florestal de Portugal. Rua de Santa Catarina, nº753, 4000-454 PORTO
**Professor Associado
Centro de Ecologia Aplicada Prof. Baeta Neves. Instituto Superior de Agronomia, Tapada da Ajuda, 1349-017 LISBOA
Sumário. A compreensão dos efeitos da estrutura da paisagem na dinâmica das populações é um objectivo fundamental da ecologia da paisagem e uma etapa crítica para a implementação de iniciativas de conservação das espécies.
]]> A Ecologia da Paisagem surgiu assim pela necessidade de compreender o desenvolvimento e a dinâmica do padrão da paisagem nos diversos fenómenos ecológicos, reconhecendo-se que esses processos ecológicos afectam e são afectados pela interacção dinâmica entre os ecossistemas.O presente trabalho pretende estudar a relação existente entre as 17 espécies de anfíbios e as 27 espécies de répteis que ocorrem em Portugal, tendo em conta a importância que estes dois grupos representam, e os elementos que constituem a paisagem, de forma a tentar compreender as funções que esta desempenha em relação às várias espécies consideradas.
Foram criados modelos estatísticos a partir da distribuição dos anfíbios e dos répteis com os tipos de habitat existentes, integrados num Sistema de Informação Geográfica, tendo sido possível compreender que a diversidade biológica, relativamente a estas espécies, está fortemente relacionada com o tipo de habitat.
Palavras-chave: anfíbios; répteis; tipos de habitat; riqueza específica; ecologia da paisagem
Composition and Structure of the Landscape: Its Relation to the Wealth of the Amphibians and Reptiles Occurring in Continental Portugal
Abstract. Understanding the effects of the landscape structure on population dynamics is one of the main goals of landscape ecology, and is a critical step in the implementation of conservation efforts.
Landscape ecology evolved due to the necessity of understanding the development and dynamics of landscape pattern on the ecological phenomena, and recognizing that ecological processes both affect and are affected by dynamic interactions between the ecosystems.
This work studies the relationship between the seventeen species of amphibians and the twenty-seven species of reptiles found in Portugal. It considers the importance of these two groups and the elements of the landscape, in order to understand their functions in the various species considered.
]]> Statistical models were developed based on the distribution of amphibians and reptiles within different habitat types, and were integrated into a Geographic Information System, that made it possible to understand that biological diversity, concerning these species, is strongly related to the habitat type.Key words: amphibians; reptiles; habitat types; specific richness; landscape ecology
Composition et Structure du Paysage: sa Relation avec la Richesse des Amphibiens et des Reptiles qui se Produisent au Portugal Continental
Résumé. La compréhension des effets de la structure du paysage sur la dynamique des populations est un but fondamental de l'étude de l'écologie du paysage et une étape critique pour l'implémentation d'initiatives pour la conservation de différentes espèces.
L'Ecologie du Paysage est apparue, donc, du besoin de comprendre le développement et la dynamique du modèle de paysage en ce qui concerne les différents phénomènes écologiques. On a reconnu, aussi, que ces processus écologiques affectent et sont affectés par l'interaction dynamique au milieu des écosystèmes.
Ce travail a l'intention d'étudier la relation établie entre les 17 espèces d'amphibies et les 27 espèces de reptiles qui existent au Portugal et des éléments constitutifs du paysage, faisant attention à l'importance que ces deux groupes d'animaux représentent au niveau de l'écologie du paysage. On essaye aussi de comprendre les fonctions que le paysage accomplit relativement aux espèces considérées.
On a créé des modèles statistiques à partir de la distribution des amphibies et des reptiles en ce qui concerne les types d'habitat existants, intégrés dans un Système d'Information Géographique. On s'est aperçu que la diversité biologique de ces espèces est fortement liée au type d'habitat où elles sont présentes.
Mots clés: amphibies; reptiles; types d'habitat; richesse spécifique; écologie du paysage
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Bibliografia
ALVAREZ-ARBESÚ, R., FELICÍSIMO, A. M., 2002. GIS and logistic regression as tools for environmental management: a coastal cliff vegetation model in Northern Spain. Management Information Systems 2002, Wessex Institute of Technology, Halkidiki, Grecia, 24-26 Abril, pp. 215-224. [ Links ]
ARCVIEW GIS 3.2 Copyright ã 1992 – 1999. [ Links ]
ATAURI, JOSÉ A., LUCIO, JOSÉ V., 2001. The role of landscape structure in species richness distribution of birds, amphibians, reptiles and lepidopterans in Mediterranean landscapes. Landscape Ecology 16 : 147 - 159. [ Links ]
CRESPO, E.G., OLIVEIRA, M.E., 1989. Atlas da Distribuição dos Anfíbios e Répteis de Portugal Continental. S.N.P.R.C.N.. Lisboa, 98 pp. [ Links ]
DEGRAAF, R., RUDIS, D., 1981. Forest habitat for reptiles & anfibians of the northeast. U.S. Department of Agriculture, Forest Service, Northeast Forest Experiment Station and Eastern Region, 239 pp. [ Links ]
DGF, 1998. Plano de Desenvolvimento Sustentável da Floresta Portuguesa. Lisboa, 126 pp. [ Links ]
DGF, 2001. Inventário Florestal Nacional: Portugal continental 3ª Revisão, 1995 – 1998, Relatório Final. Direcção Geral das Florestas. Lisboa, 233 pp. [ Links ]
FELICÍSIMO, A., 2003. Uses of Spatial Predictive Models In Forested Areas Territorial Planning. CIOT 2003, IV International Conference on Spatial Planning, New Territories for New Societies, Zaragoza, 15 pp. [ Links ]
FREEMARK, K., 1995. Assessing effects of agriculture on terrestrial wildlife: developing a hierarchical approach for the US EPA. Landscape and Urban Planning pp. 99–115. [ Links ]
GODINHO, R., TEIXEIRA, J., REBELO, R., SEGURADO, P., LOUREIRO, A., ÁLVARES, F., GOMES, N., CARDOSO, P., CAMILO-ALVES, C., BRITO, J., 1999. Atlas of the continental Portuguese herpetofauna: an assemblage of published and new data. Rev. Esp. Herp. 13 : 61–82. [ Links ]
GODINHO-FERREIRA, P., AZEVEDO, A., REGO, F., 2005. Carta da Tipologia Florestal de Portugal Continental. Silva Lusitana 13(1) : 1-34 [ Links ]
HECTOR, A., JOSHI, J., LAWLER, S.P., SPEHN, E.M., WILBY, A., 2001. Conservation implications of the link between biodiversity and ecosystem functioning. Oecologia 129 : 624–628. [ Links ]
HEGEWALD, JANICE, PFAHLBERG, ANNETTE, UTER WOLFGANG, s.d. A Backwards-Manual Selection Macro for Binary Logistic Regression in the SAS® v.8.02 PROC LOGISTIC Procedure. Institute of Medical Informatics, Biometry, and Epidemiology, Erlangen, Germany. [ Links ]
HOBBS, R.J., RICHARDSON, D.M., DAVIS, G.W., 1995. Mediterranean – Type Ecosystems: Opportunities and Constraints for Studying the Function of Biodiversity. G.W. Davis e D.M. Richardson (Eds.). Ecological Studies: Vol. 109. [ Links ]
KOLOZSVARY, M., SWIHART, R., 1999. Habitat fragmentation and the distribution of amphibians: patch and landscape correlates in farmland. Canadian Journal of Zoology 77 : 1288–1299. [ Links ]
LITT, A.R., PROVENCHER, L., TANNER, G.W., FRANZ, R., 2001. Herpetofaunal Responses to Restoration Treatments of Longleaf Pine Sandhills in Florida. Society for Ecological Restoration 9(4) : 462–474. [ Links ]
MALKMUS, R., 1995. Die amphibien und reptilien Portugals, Madeiras und der Azoren. Westarp Wissenchaften, Madgeburg, 192 pp. [ Links ]
MCGARIGAL, KEVIN, MARKS, BARBARA J., 1995. FRAGSTATS: spatial pattern analysis program for quantifying landscape structure. Gen. Tech. Rep. PNW-GTR-351. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 122 pp. [ Links ]
MCLEOD, R.F., GATES, J.E., 1997. Response of Herpetofaunal Communities to Forest Cutting and Burning at Chesapeake Farms, Maryland. Am. Midl. Nat. 139 : 164–177. [ Links ]
MITCHELL, J.C., RINEHART, S.C., PAGELS, J.F., BUHLMANN, K.A., PAGUE, C.A., 1997. Factors influencing amphibian and small mammal assemblages in central Appalachian forests. Forest Ecology and Management 96 : 65–76. [ Links ]
O'NEILL, R.V., KRUMMEL, J.R., GARDNER, R.H., SUGIHARA, G., JACKSON, B., DEANGELIS, D.L., MILNE, B.T., TURNER, M.G., ZYGMUNT, B., CHRISTENSEN, S., DALE, V.H. GRAHAM, R.L., 1988. Indices of Landscape pattern. Landscape Ecology 1 : 153–162. [ Links ]
PARRESOL, BERNARD. R., MCCOLLUM, JOSEPH, 1997. Characterizing and Comparing Landscape Diversity Using GIS and a Contagion Index. Journal of Sustainable Forestry 5 (1/2) : 249–261. [ Links ]
PEREIRA, J., ITAMI, R., 1991. GIS – based habitat modeling using logistic multiple regression: a study of the Mt. Graham Red Squirrel. Photogrammetric Engeneering and Remote Sensing 57(11) : 1475–1486. [ Links ]
POUDVIGNE, I., BAUDRY, J., 2003. The implecation of past and present landscape patterns for biodiversity research: introduction and overview. Landscape Ecology 18 : 223-225. [ Links ]
PUUMALAINEN, J., 2001. Structural, compositional and functional aspects of forest biodiversity in Europe. Geneva Timber and Forest Discussion Papers. ECE/TIM/ DP/22. United Nations. New York and Geneva. [ Links ]
ROUSSEEUW, P.J., LEROY, A.M., 1987. Robust Regression and Outlier Detection, John Wiley & Sons, New York. [ Links ]
RUSTIGIAN, H.L., SANTELMANN, M., V.e SCHUMAKER, N.H., 2003. Assessing the potencial impacts of alternative landscape designs on amphibian population dynamics. Landscape Ecology 18 : 65-81. [ Links ]
SPSS, 2003. SPSS 12.0 for Windows: SPSS I. [ Links ]
TEIXEIRA, J., ARNTZEN, J.W., FERRAND, N., ALEXANDRINO J., 1996. Elaboração de um modelo explicativo da distribuição da Chioglossa lusitanica em Portugal. IV Congresso Luso – Espanhol de Herpetologia. Porto, Dezembro de 1996. [ Links ]
THOMPSON, I.D., BAKER. J.A., TER-MIKAELIAN, M., 2003.A review of the long-term effects of post-harvest silviculture on vertebrate wildlife, and predictive model, with an emphasis on boreal forests in Ontario, Canada. Forest Ecology and Management 177(1-3) : 441–469. [ Links ]
WIENS, J.A. 1997. The emerging role of patchiness in conservation biology. Enhancing the Ecological Basis of Conservation: Heterogeneity, Ecosystem Function, and Biodiversity (S.T.A. Pickett, R.S. Ostfeld, M. Shachak, and G.E. Likens, eds.). Chapman and Hall, New York, pp. 93-107. [ Links ]
WIENS, J.A., 1999. Ecological heterogeneity: an ontogeny of concepts and approaches. The Ecological Consequences of Environmental Heterogeneity. Michael J. Hutchings, Elizabeth A. John e Alan J. A. Stewart Eds. Blackwell Science, 9–31. [ Links ]
WITH, K.A., CRIST, T.O. 1995. Critical Thresholds in Species Responses to Landscape Structure. Ecology 76(8) : 2446-59. [ Links ]
]]>Entregue para publicação em Fevereiro de 2005
Aceite para publicação em Abril de 2005
1 O presente trabalho resume alguns dos aspectos da Dissertação intitulada "Relação entre a Composição e a Estrutura da paisagem e a Herptofauna em Portugal Continental", apresentada por Jorge Cunha, na UTAD, para a obtenção do grau de Mestre em Engenharia de Recursos Florestais, em Outubro de 2004
21º Autor E-mail: forestis@mail.telepac.pt
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