The Conservation of Plant Biodiversity

Voorkant
Cambridge University Press, 21 sep 1995 - 299 pagina's
The Conservation of Plant Biodiversity takes an evolutionary perspective to the conservation of plant biodiversity, stressing the need to explore both current and long-term issues. It highlights three conservation strategies: communities conserved in nature reserves; individual species conserved in nature reserves or botanic gardens; and domesticated plants, preserved mainly in germplasm collections. Because conservation biology has such a broad scope and relevance to the community at large, it is faced with several controversial issues such as the dichotomy between the preservation of individual species versus a broader focus on the ecosystem; the relative importance to give to endangered species; the design and management of reserves and the value of corridors; and the drive for increasing agricultural productivity through plant improvement versus the drive to maintain traditional peasant varieties in cultivation. Here, these and other issues are examined, by emphasizing and exploring the underlying scientific principles. The conservation of whole communities emerges as the paramount strategy for maintaining the evolutionary potential of plant life.
 

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Inhoudsopgave

The biological system of conservation
1
the ecological perspective
2
the evolutionary perspective
3
biodiversity
5
16 The conservation of biodiversity
8
The genetic diversity of wild plants
10
22 Levels and patterns of diversity
11
222 Allozyme evidence
12
455 DNA banks as germplasm collections
110
46 Organization and management
111
461 International beginnings
112
procedures and responsibilities
113
463 Genetic resources centres The global network
115
464 National institutions and international networks
116
Plant species conservation and population biology
118
52 Concept of minimum viable population
119

223 Molecular polymorphism
15
23 Major determinants of variation
22
231 The physical environment
23
232 Biotic interactions and hostpathogen systems
25
233 Mating system and historic effects
27
24 Use of wild genetic resources in plant improvement
29
242 Sources of new adaptations
32
243 The need for collecting wild relatives
33
25 Sampling strategies
34
251 Sampling theory of the infinite neutral alleles model
35
252 Sufficiency of sampling procedures
36
253 Optimal allocation of sampling effort
37
26 Conclusion the genes of concern
38
The genetic diversity of cultivated plants
39
312 Domestication
40
313 Single versus multiple domestication
47
314 Genetics of domestication
48
315 Geography of domestication
49
316 Dispersal and diversification
52
317 The dynamics of genetic diversity
54
32 Genetic resources today
56
321 Landraces
57
322 Landraces population structure
60
323 Landraces specific contributions
65
324 Landraces adaptations and coadaptations
67
325 Landraces today and tomorrow
68
326 Advanced cultivars
72
327 Lifesupport underutilized and new crops
74
The conservation of cultivated plants
79
42 Conservation in situ
81
43 Populations ex situ mass reservoirs
84
44 Static conservation
86
442 Longterm storage of orthodox seeds
87
444 Recalcitrant seeds
89
446 Regeneration and multiplication
90
447 Preservation of wild species as seeds
91
448 Conservation of pollen
93
4410 In vitro conservation
95
45 Germplasm collections
97
451 Size of germplasm collections
99
452 Core collections
101
453 Representativeness of germplasm collections as research material
104
454 Genetic stock collections
108
53 Population viability or vulnerability analysis
122
54 Population genetic processes
126
542 Sexual reproduction
136
543 Migration and gene flow
141
544 Diversifying selection pressures
145
55 Conclusion identifying risks to populations
147
The conservation in situ of useful or endangered wild species
148
62 Species targets for conservation in situ
149
622 Medicinal plants
157
623 Forage plants
161
624 Wild relatives of crop
163
625 Endangered species
170
63 Conclusion management and conservation in situ
173
Ex situ conservation of threatened and endangered plants
176
72 The role of botanic gardens in conservation
179
721 International Botanic Gardens Conservation Strategy
180
722 A national centre for plant conservation
181
73 Issues in species conservation
182
732 Selection of endangered species for ex situ conservation
183
733 Preserving genetic diversity
186
734 Reintroducing rare and endangered species
189
735 Documentation and information
190
Community structure and species interactions
193
82 The structure of communities competition and the physical environment
194
83 Interorder interactions and the structure of communities
197
832 Role of soil microflora and fauna in shaping community structure
209
84 Conclusions
210
Choosing plant community reserves
211
92 What are we trying to conserve and for how long?
212
93 How do we determine what areas to protect?
213
932 Reserve selection and design
218
94 Conclusions the reality of saving what we can
232
Managing plant community reserves
234
102 The consequences of global climate change
235
103 Maintaining the physical integrity of reserves
239
104 Maintaining the biological integrity of reserves
242
1042 Abiotic and biotic threats
246
105 Conclusions can all communities be saved?
255
CONCLUSIONS
258
References
260
Glossary
291
Index
293
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