Ingrid Roth; Ana-Maria Giménez de Bolzón:

Argentine Chaco Forests

Dendrology, Tree Structure, and Economic Use. 1. The semi-arid Chaco

1997. VIII, 180 pages, 34 figures, 13 tables, 17x24cm, 650 g
Language: English

(Encyclopedia of Plant Anatomy, Band XIV Teil 5)

ISBN 978-3-443-14025-0, bound, price: 84.00 €

in stock and ready to ship

Order form

BibTeX file


ArgentinaChacoforestsoilClimatedendrologyChacoWaldBoden KlimaDendrologie Argentinien


Content Description top ↑

The forests of Chaco Park, the most extensive forest region of Argentina, have been affected by cutting, burning and inappropriate management for centuries. In the last decades, however, exploitation of these forests progressed at such a high rate that the whole area is in danger of being transformed into a semi-desert unless measures of conservation and afforestation are taken. The area of the Chaco forests corresponds approximately to the area of Germany and is therefore not negligible. If the exploitation of forests continues at the present rate, world climate will suffer.

For this reason, the authors attempted to characterize the trees still growing in the Chaco and to determine which adaptational strategies they use to survive in its semi-arid climate, with long periods of heat and drought, with occasional torrential rainfalls sweeping away valuable soils, and great differences in temperature ranging from +47°C to -7°C.

The authors studied their dendrology, wood and bark properties, their radical system, their phaenology, as well as their economic uses. With this knowledge the authors suggest measures for the conservation and the afforestation of these precious woodlands. Proposals for a better management include suggestions as to which species would be most appropriate for afforestation.

Contents top ↑

Preface V
Introduction 1
Historical background of the forest destruction 3
Geographic situation, climate and soil 5
I Vegetation 9
Material and methods 13
Dendrological description of the most important 30 species
of the semi-arid Chaco 1G
Discussion of the dendrological results 29
Height and habitue of the trees 29
Diameter at breast height 31
Type of leaves 31
Leaf fall 32
Flowering and fruiting periods 36
Dispersal types of fruits 37
Macroscopic and outer aspect of the bark 38
Discussion of the macroscopic and outer bark aspect 49
Total bark width 50
Rhytidome width (dead bark) 52
Microscopic bark structure 53
Discussion of the microscopic bark structure 87
Storied structure 87
Arrangement of the hardbast 87
Amount of Obers or stone cells 88
Secondary formation of stone cells 89
Consistency of the bark 89
Secretory cells or canals 89
Crystals 89
Inner conducting bark 90
Dilatation growth 90
Rhytidome 90
Cork formation 90
Spines 91
Phelloderm 91
Bark of young and old stems 91
Adaptations and multilayered persistent epidermis 91
Microscopic wood structure 91
Discussion of the microscopic wood structure 118
Porosity 118
Vessel distribution 119
Tangential vessel diameter 120
Vessel density 121
Vessel member length 123
Vessel net area 123
Perforation plates 123
Axial parenchyma 124
Xylem rays 125
Mechanical tissue 125
Storied structure 125
Growth rings 126
Adaptations to the climate 127
Commercially important wood properties 127
Economic uses of the tree species studied 131
Phacnology (with a comparison of undisturbed primary and
exploited secondary forest) 140
Destructive forces in the Chaco 143
Fire as an important factor of forest destruction 144
Suggestions for the conservation and afforestation of the dry Chaco 144
Prosopis juliflora 148
Final conclusions 150
Bibliography 163
Author index 176
Subject Index 177
Index of vernacular plant names 177
Index of scientific plant names 178