MONOGRAPHIAE BIOLOGICAE Editor J. ILLIES, SCHLITZ VOLUME 21 SPRINGER-SCIENCE+BUSINESS MEDIA, B.V. 1972 BIOGEOGRAPHY AND ECOLOGY IN MADAGASCAR Edited by R. BATTISTINI & G. RICHARD-VINDARD SPRINGER-SCIENCE+BUSINESS MEDIA, B.V. 1972 ISBN 978-94-015-7161-6 ISBN 978-94-015-7159-3 (eBook) DOI 10.1007/978-94-015-7159-3 Copyright 1972 by Springer Science+Business Media Dordrecht Originally published by Dr. W. Junk B.V., Publishers, The Hauge 1972 Reprint of the original edition 1972 Cover design E. Velthuijs, The Hague Zuid-Nederlandsche Drukkerij N.V., 's-Hertogenbosch AII English articles translated from French into EngIish by Language Consultants (Benelux) Ltd., London CONTENTS Chapters' contents . . . . . . . . . . . . . VI Introduction . . . . . . . . . . . . . . . XII Madagascar relief and main types of landscape 1 The geology of Madagascar 27 The climatology of Madagascar. . 87 Flora and vegetation of Madagascar -145 The forest of Madagascar . . . . . 191 Les sols de Madagascar . . . . . . 201 Accelerated erosion and soil degradation 227 Rivers and streams on Madagascar . . 261 Man and the environment in Madagascar 311 The Malagasy subfossils . . . . . . . . 339 The coral reefs of Madagascar . . . . . 367 Some ecological and biogeographical problems of the entomofauna of Madagascar . . . . . . . . . . . . . . . . . 411 Les arachnides de Madagascar . . . . . . . . . . . 427 Le peuplement de Mollusques terrestres de Madagascar 459 Fishes of the continental waters of Madagascar . . . 477 Les reptiles de Madagascar et des iles voisines 501 The evolution and affinities of the birds of Madagascar 615 Insectivores . . . . . . . . . . . . . . . . . . 629 The rodents ofMadagascar: The seven genera ofMa1agasy rodents 661 The carnivora of Madagascar ........... 667 Order of primates; Sub-order of lemurs . . . . . . . 683 Human diseases and their relationship to the environment 703 The problems of nature conservation in Madagascar 727 In conclusion 741 Index. . . . . . . . . . . . . . . . . . . . 757 v CHAPTERS' CONTENTS R. BA TTI S TI NI: Madagascar reliefa nd lDain types oflandscape Relief: the rocks of the Precambrian shelf 5 Relief: sedimentary layers . . . . 7 The problem of the erosion surface ll Volcanic land forms. . . . . . . 13 The littoral relief . . . . . . . . 16 Pliocene-Quaternary variations in the climate . 20 Panorama of the main types of natural scenery 22 P. BRENON: The geology of Madagascar Historical . . . . . . . . 27 General features 29 The Precambrian basement. 34 The Androyan system 38 The Graphite system 41 The Vohibory system 46 Terminal Precambrian 51 Structure of the Precambrian basement 54 Mineral resources of the basement complex 57 Sedimentary zone 57 Precambrian basement 58 J U pp er urassic 65 Cretaceous. . . . 66 Tertiary .... 68 Recent formations 70 Volcanic activity of Madagascar. 74 Recent crustal movements . . . 80 G. DONQUE: The clilDatology ofMadagascar 87 The climatic mechanisms 87 Position . . . . . . . . . 87 The maritime environment . 94 Altitude and relief . . . . 95 Atmospheric Conditions . . 99 The subtropical highs and the south-east trade wind 99 The southerly perturbation current . . 103 Intertropical Convergence and Monsoon . . . . . 104 VI Secondary centres of action 105 Tropica1 cyc10nes . . . . . 106 Regional c1imato10gica1 outline 114 The Eastern Regions 114 The Plateau . . . . . . . 122 The West . . . . . . . . 130 The South and South-West 135 The regions ofthe extreme North and North-West 139 Bibliography . . . . . . . . . . . . . . . . . 142 J. KOECHLIN: Flora and vegetation ofMadagascar 145 Introduction . . . . . . . 145 The ecological environment 146 Eastern Malagasy region 151 The Western Malagasy region 151 Flora and vegetation 155 The facts 156 The explanations . . 157 The vegetation . . . 161 The woody formations . 162 The grass formations. 180 Conc1usions 189 References . . . . . 190 B. CHAUVET: The forest ofMadagascar 191 Eastern type forests . 191 Western type forests . 195 Southern type forests 197 The High Plateaux 197 Conc1usion . 198 References . . . . 199 P. ROEDERER: Les sols de Madagascar 201 Generalites ........ 201 Les sols de Madagascar . . . . . . . . 201 Repartition des sols par region . . . . . 223 Valeur agronomique des sols de Madagascar 224 Conc1usion. . 225 Bibliographie. . . . . . . . . . . . . . 225 P. LE BOURDIEc: Accelerated erosion and soll degradation 227 Forms of erosion . 228 The laminar forms 228 VII The linear forms . 231 Mass movements . 234 Elementary lavaka 238 Compound lavaka 239 The causes of accelerated erosion 241 Direct action. . . . . . . . . 243 Indirect action . . . . . . . . 244 Consequences of accelerated erosion 246 The fight against erosion . 251 Conclusion . 257 Bibliography . . . . . . 257 M. ALDEGRERI: Rivers and strealns on Madagascar 261 Hydrography ......... 261 The slopes of the Ambre mountain 263 The Tsaratanana slopes 263 The Eastern slopes 265 The Western slopes . 270 The Southern slopes . 285 Hydrology. . . . . 288 The northern or Ambre mountain regime. 290 North-eastern regime . . . 291 Tsaratanana regime. . . . . . 291 Regime of the eastern slopes . . 293 The regime of the high Plateaux 294 The regime of the North-west coast 300 The South central regime 300 The West coast regime 303 The South Sahelian regime 303 The mixed regimes 305 Bibliography . . . . . . . 310 R. BATTISTINI & P. VERIN: Man and the environlnent in Madagascar 311 Recent transformation of the environment in Madagascar: Flora, fauna and erosion system ..... 311 The settlement of the island . . . . 317 The present population of the island . 330 Bibliography . . . . . . . . . . . 336 J. MARE: The Malagasy subfossils 339 Introduction . . . . . . . . . . 339 The fields containing subfossils . . 339 The main subfossils of Madagascar 341 VUl Origin of the subfossil fauna 352 Extinction of the subfossils 359 Conclusion . 362 Resume . . 362 Bibliography 364 M. PICHON: The coral reefs of Madagascar 367 Abstract. . . . . . . . . . . . 367 Coral reefs and Scleractinian corals . . . . . . 367 Zonation in reefs . . . . . . . . . . . . . . 373 Distribution of coral reefs along the coast of Madagascar 386 The reefs of the N orth-West coast of Madagascar 386 The reefs of the Mid-West coast of Madagascar 395 The reefs on the South-West coast of Madagascar 396 The reefs of the East coast of Madagascar 406 Conclusions 407 References . . . . . . . . . . . . . . 408 R. PAULIAN: SODle ecological and biogeographical probleDls of the entoDlofauna of Madagascar 411 Pre-Tertiary elements 416 Recent elements 420 Conclusions 425 References . . . 426 R. LEGEND RE : Les arachnides de Madagascar 427 Scorpiones . 427 Uropygi . . 434 Amblypygi . 435 Palpigradi . 435 Araneae . . 435 Pseudo-Scorpions 446 Opilions. . . 447 Acari . . . . 448 Bibliographie . 450 E. FISCHER-PIETTE et MME F. BLANc: Le peupleDlent de MoUusques terrestres de Madagascar 459 Introduction . . . . . . . . . . . . . . . . . . . . . . . 459 a Etude, pour chaque genre, de sa distribution l'interieur de l'ile et du degre d'endemisme que presentent ses especes 462 Groupement de ces resultats 464 Remarque . . . . . . . . . . . . . . . . . 468 IX Conclusions . . . . . . . . . . . . . . . . . . . . . . . 468 Rapports entre les mollusques et la vegetation ........ 469 OriginaliU et affinites de la faune malacologique terrestre de Madagascar . . . . . . . . 470 Affinites de chacun des genres 471 Recapitulation 472 Bibliographie 476 A. KIENER & G. RICHARD-VINDARD: Fishes of the continental waters of Madagascar 477 Introduction . . . . . . . . . . . . . . . . . . . . . . . 477 General description of the ecological conditions found in Fresh and Brackish waters in the Grande ile . . . . . . . . . . . . . . 477 Definition of the waters studied, extent of the continental waters. . 477 Species found in fresh waters and brackish waters. Principal ecologic- al and biological factors conditioning the penetration of the inland waters by species with marine affinities. . . . . . 480 General characteristics of the Ichthyological fauna . 482 General ecological conditions . . . . . . . . . . 485 Ichthyological fauna . . . . . . . . . . . . . 488 Description of the principal families of economic importance 488 Secondary families and general summary of species . . . . . 490 Peculiarities and biogeography of some species, scientific problems encountered with certain of these . . . . . 491 Fisheries and Fish culture, planning problems. . . . . . . . . 495 CH. P. BLANc: Les reptiles de Madagascar et des iles voisines 501 Introduction . . . . . . . . . . . . , . 501 Repertoire systematique . . . . . . . . . 504 Observations sur la composition de la faune 527 Origine ou affinites de la faune . . 547 Le peuplement de l'aire Malgache 564 Eco1ogie. . 582 Conclusion . 594 Resurne . . 596 Summary . 596 Bibliographie. 596 J. DORsT: The Evolution and affinities of the birds of Madagascar 615 Poverty of Malagasy avifauna . . . . . . 615 Unique nature of the Malagasy avifauna 618 Oriental affinities of the Malagasy avifauna 620 African affinities of the Malagasy avifauna 620 x The colonization of Madagascar by birds 622 Evolution of Malagasy avian communities 624 References . . . . . . . . . . . 627 H. HEIM DE BALSAC : Insectivores 629 Soricidae . . . . . . . . 629 Tenrecidae ...... 631 Historique & Repartition. 631 Evolution et Speciation - Particularites biologiques 634 La speciation chez les Tenrecidae . . . . . . . . 647 Ecologie et particularites biologiques des Oryzoryctinae 658 F. PETTER: The rodents of Madagascar: The seven genera of Malagasy rodents 661 Hypogeomys . 663 Macrotarsomys 663 N esomys. . . 664 Eliurus 664 Gymnuromys 665 Brachytarsomys . 665 Brachyuromys . 665 R. ALBIGNAC: The carnivora of Madagascar 667 The Fossa genet. 668 Eupleres. . 669 Galidia . . 672 Mungotictis 674 Ga1idictis 676 Salanoia. . 677 Cryptoprocta . 678 The Civet-cat. 680 Conclusion . 681 Bibliography . 681 J. J. PETTER: Order ofpriDlates: Sub-order ofleDlurs 683 E. R. BRYGOO: HUDlan diseases and their relationship to the EnvironDlent 703 The air and the soil . . . . . . 703 Men . . . . . . . . . . . . 704 Mammals and human pathology 711 Invertebrates: Intermediate hosts and vectors 716 Present-day situation and outlook 717 References . . . . . . . . . . . . . . . 724 XI