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  • 1
    Online Resource
    Online Resource
    Amsterdam :Elsevier Science & Technology,
    Keywords: Rain forest ecology. ; Electronic books.
    Description / Table of Contents: After publication of the first volume of the Tropical Rain Forest, the International Journal of Mycology and Lichenology commented ``This is a welcome addition to the literature on the ecology of tropical rain forests. The book provides a wealth of data and stimulating discussions and is of great interest to ecologists interested in tropical areas.'' Whereas the first volume dealt with system-ecological aspects such as community organization and processes, the present volume concentrates on biogeographical aspects such as species composition, diversity, and geographical variation. Recent ecological research in the tropical rain forest has greatly extended our understanding of biogeographical patterns of variation in the various groups of organisms, and has revealed many of the ecological and evolutionary forces that led to the present patterns of variation. Many important systems of co-evolution between the tropical rain forest ecosystems have also come to light, and the loss of species and related damage is better understood in quantitative terms. This volume presents a comprehensive review of these and other features of the rain forest ecosystem structure, and the ecological processes operating that system. General chapters on abiotic and biotic factors are followed by specific chapters on all major groups of organisms. Prospects for the future are discussed and research needs clearly stated. Also the human exploitation of the system, its effects and its limits are discussed. The book is extensively illustrated by photographs, graphs, and tables, and comprehensive bibliographies follow each chapter. Author, systematic and subject indices complete the book. It is a must for all ecologists, agriculturists, foresters, agronomists, hydrologists, soil scientists, entomologists, human ecologists, nature conservationists, and planners dealing with
    Type of Medium: Online Resource
    Pages: 1 online resource (733 pages)
    Edition: 1st ed.
    ISBN: 9780444596499
    Series Statement: Issn Series ; v.Volume 14B
    DDC: 574
    Language: English
    Note: Front Cover -- Tropical Rain Forest Ecosystems: Biogeographical and Ecological Studies -- Copyright Page -- Table of Contents -- Preface -- Contents of Volume 14 -- LIST OF CONTRIBUTORS TO VOLUME 14 -- CHAPTER 1. INTRODUCTION -- Surface area change -- Species diversity -- References -- CHAPTER 2. CLIMATE AND WEATHER -- Introduction -- Radiation and heat -- Thermal climate of the rain-forest region -- The atmospheric circulation -- Precipitation in the rain-forest region -- The water budget in the tropical rain-forest region -- Climate changes and tropical rain forest -- References -- CHAPTER 3. VERTICAL STRATIFICATION IN MICROCLIMATE -- Introduction -- Light -- Wind -- Temperature and humidity -- Carbon dioxide concentration -- References -- CHAPTER 4. SOILS -- Introduction -- Soil geography -- Common misconceptions -- Soil constraints to plant growth -- Conclusions -- References -- CHAPTER 5. HYDROLOGY -- Introduction -- Definition of the area -- Limitations of the approach -- Objectives -- CHT river regimes -- Specific runoff of CHT river basins -- Water balance of CHT river systems -- Hydrogeochemistry of CHT river systems -- Geobiochemical classification of CHT rivers -- Clay minerals in sediments of CHT rivers -- Colloidal organic matter in CHT rivers -- Conclusions -- References -- CHAPTER 6. AMERICAN TROPICAL FORESTS -- Introduction -- Lowland tropical moist forests -- Montane and lower montane moist forests -- Inundated forest types -- Transition forests -- Tropical (and subtropical) evergreen seasonal conifer forest -- Forest on white-sand soil -- Acknowledgements -- References -- CHAPTER 7. VASCULAR EPIPHYTISM IN AMERICA -- Introduction -- The epiphyte synusia -- Major adaptations -- Phytogeography and diversity -- Origins of neotropical epiphyte diversity -- Epiphytes vis-a-vis other vegetation -- References. , CHAPTER 8. AFRICAN FORESTS -- Introduction -- Major floristic divisions -- Lowland forests -- Montane forests -- The forest cycle -- The forest boundary -- Agriculture and the forest fallow -- Phytosociology -- Acknowledgements -- References -- CHAPTER 9. VASCULAR EPIPHYTISM IN AFRICA -- How common are vascular epiphytes in Africa? -- Species, communities and successions -- Environmental influence -- Effects of epiphytes on their host trees -- References -- CHAPTER 10. SOUTHEAST ASIAN TROPICAL FORESTS -- Introduction -- Extent of the southeast Asian tropical rain forests -- Floristics of the Asian tropical rain forests -- The tropical rain-forest formations -- Conclusions -- References -- CHAPTER 11. DIPTEROCARP REPRODUCTIVE BIOLOGY -- Introduction -- Dry evergreen forests -- Seasonal evergreen dipterocarp forest -- Aseasonalevergreen dipterocarp forests -- Discussin -- References -- CHAPTER 12. THE RAIN FORESTS OF NORTHEASTERN AUSTRALIA - THEIR ENVIRONMENT,EVOLUTIONARY HISTORY AND DYNAMICS -- Introduction -- Environmental features -- References -- CHAPTER 13. VASCULAR EPIPHYTISM IN AUSTRALO-ASIA -- Introduction -- Flora and phytogeography -- Crassulacean acid metabolism (CAM) in the Australian vascular epiphytes -- Appendix -- References -- CHAPTER 14. THE FORESTS IN THE TROPICAL PACIFIC ARCHIPELAGOES -- Introduction -- Environment -- Floristic resources -- The different types of forests -- Forests, fauna and human activities -- Conclusions -- References -- CHAPTER 15. LICHENS -- Introduction -- Available knowledge -- General outlines of lichen vegetation in tropical rain forests -- Phytogeography -- Various biological aspects -- References -- CHAPTER 16. BRYOPHYTES -- Introduction -- Tropical rain forests of America, Asia and Africa -a bryogeographical comparison -- Altitudinal diversification -- Species ranges -- Epiphytism and growth forms. , Bryophyte habitats -- Acknowledgements -- References -- CHAPTER 17. PTERIDOPHYTES -- Introduction -- Diversity -- Endemism -- Ecological aspects -- History -- Acknowledgements -- References -- CHAPTER 18. THE CLIMBERS - LIANES AND VINES -- Introduction -- Classification of climbers -- Distribution in floras of the world -- The climbing form -- Stems -- Climbers in rain-forest structure -- Climbers as competitors with rain-forest trees -- Flowering, dispersal, germination and persistence -- Naturalized climbers -- Discussion -- References -- CHAPTER 19. PRIMATES OF PENINSULAR MALAYSIA -- Introduction -- The habitat -- Digestive systems and diet -- Ranging and social behaviour -- Biomass -- Conclusion -- Acknowledgements -- References -- CHAPTER 20. BATS -- Introduction -- Zoogeography -- Species richness -- Trophic structure -- Conclusion -- References -- CHAPTER 21. RODENTS -- Introduction -- The Oriental region -- The Australian region -- Ethiopian region -- The neotropical region -- Conclusions -- References -- CHAPTER 22. BIRDS -- Introduction -- Zoogeography - an eco-taxonomic analysis -- Species richness -- Trophic structure -- Discussion -- Summary -- Acknowledgements -- References -- CHAPTER 23. HERPETOFAUNA OF TROPICAL AMERICA AND AFRICA -- Introduction -- Zonal distribution -- References -- CHAPTER 24. THE SPATIAL DISTRIBUTION OF FLYING INSECTS -- Introduction -- References -- CHAPTER 25. MOTHS -- Introduction -- Adult behaviour -- Seasonality -- Host-plant relationships -- Patterns of lepidoptera diversity -- Lepidoptera diversity and plant diversity -- Zoogeography -- Moths as indicators -- Acknowledgements -- References -- CHAPTER 26. TERMITES -- Introduction -- Zoogeography and faunistics -- Adaptations of termites to climatic factors -- Distribution of termites within rain forest -- Taxonomic composition of termite communities. , Dietary patterns in termite communities -- Ecological impact of termites -- Effects of deforestation on termite communities -- Conclusions -- Acknowledgements -- References -- CHAPTER 27. LEAF-CUTTING ANTS -- Introduction -- Distribution and density -- Defoliating activities -- Effects on soil and nutrient cycling -- Relations with other animals -- Conclusions -- Acknowledgements -- References -- CHAPTER 28. DUNG BEETLES -- Introduction -- Assemblage of dung and carrion beetles in tropical forests -- Natural history of dung beetles (Scarabaeinae) -- Competition for dung and carrion is fierce in tropical forests -- Ecological diversification: food, time and space -- Species richness and abundance relations -- Concluding remarks -- References -- CHAPTER 29. HERBIVORY AND SECONDARY COMPOUNDS IN RAIN-FOREST PLANTS -- Introduction -- Patterns of secondary metabolite distribution -- Some comments on the diversity of the chemical-defence repertoire of individual plants -- Potential impact of some phenolic secondary metabolites in forest soils -- References -- CHAPTER 30. MYCORRHIZAS -- Introduction -- Types of mycorrhizas -- Occurrence of mycorrhizas in tropical rain forests -- Dependence on mycorrhizas -- The impact of mycorrhizal fungi on plant community composition -- The impact of plant-community composition on mycorrhizal fungi -- References -- CHAPTER 31. DECOMPOSITION -- Decomposition as an ecosystem concept -- A general model of decomposition -- Environmental influence on decomposition -- The influence of resource quality on decomposition processes -- The decomposer community of tropical forests -- Conclusions -- References -- CHAPTER 32. DECOMPOSITION IN TROPICAL RAIN FORESTS COMPARED WITH OTHER PARTS OF THE WORLD -- Introduction -- Data analysis -- Litter-pool model -- References. , CHAPTER 33. THE EXPLOITATION OF THE AFRICAN RAIN FOREST AND MAN'S IMPACT -- Introduction -- Methods of exploitation -- The history of the exploitation for timber -- The management of the forest -- The exploitation of the forest for the cultivation of agricultural crops -- The replacement of the forest by economic tree crops -- The collection of minor forest resources -- Human impact of the forest -- Acknowledgements -- References -- CHAPTER 34. EXPLOITATION IN SOUTHEASTASIA -- Introduction -- Logging -- Rattan collection -- Shifting cultivation and deforestation -- Exploitation as dusturbance -- Acknowledgements -- References -- CHAPTER 35. USE AND MISUSE OF TROPICAL RAIN FORESTS -- Early history of native forest use -- Deforestation -- Growing stock structure and forest functions -- Timber trade and consumption -- Forest management planning and control -- History of silviculture -- Feasibility of natural silviculture -- Utility and use options -- Assessment of forest resource potential and longterm planning -- Obstacles to rational forest conservation and management -- References -- AUTHOR INDEX -- SYSTEMATIC INDEX -- GENERAL INDEX.
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Plant ecology 32 (1976), S. 187-192 
    ISSN: 1573-5052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: From an analytical model it was shown that for a given total amount of nitrogen in the canopy, there exists an optimal leaf area index (LAI), and therefore an optimal average leaf introgen content, at which canopy photosynthesis is maximal. If the LAI is increased above this optimum, increased light interception will not compensate for reduction in photosynthetic capacity of the canopy resulting from reduced leaf nitrogen contents. It was further derived from the model that the value of the optimal LAI increases with the photosynthetic nitrogen use efficiency (PNUE) and decreases with the canopy extinction coefficient for light (KL) and incident photon flux density (PFD) at the top of the canopy. These hypotheses were tested on dense stands of species with different photosynthetic modes and different architectures. A garden experiment was carried out with the C4 monocot sorghum (Sorghum bicolor [L.] Moensch cv. Pioneer), the C3 monocot rice (Oryza sativa L. cv. Araure 4), the C4 dicot amaranth (Amaranthus cruentus L. cv. K113) and the C3 dicot soybean (Glycine max [L.] Merr. cv. Williams) at two levels of nitrogen availability.The C4 species had higher PNUEs than the C3 species while the dicots formed stands with higher extinction coefficients for light and had lower PNUEs than the monocots. The C4 and monocot species were found to have formed more leaf area per unit leaf nitrogen (i.e., had lower leaf nitrogen contents) than the C3 and dicot species, respectively. These results indicate that the PNUE and the extinction coefficient for light are important factors determining the amount of leaf area produced per unit nitrogen as was predicted by the model.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Oecologia 58 (1983), S. 208-214 
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A sod-cutting and fertilization experiment was performed on a Calluna-dominated heathland in The Netherlands to determine appropriate management regimes for Calluna regeneration, and to further understand the nutrient responses of heathland species. Replicated permanent plots were analysed by multivariate techniques. Sod-cutting alone caused Calluna regeneration from its soil seed bank. A single fertilization at the start of the experiment caused initial vegetation differences which disappeared after a few years as the nutrients were lost from the system, except that one application of nitrogen enhanced the rate of Calluna regeneration. Repeated fertilization caused large differences in the vegetation: repeated nitrogen enhanced several bryophyte species while greatly inhibiting Calluna, repeated phosphate partly inhibited Calluna while greatly favouring several lichen species, and the most striking result of repeated calcium was also an increase in bryophytes, but the species were different from those favoured by nitrogen. Treatments which inhibited Calluna tended to increase species diversity because of the lessened Calluna dominance.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-1939
    Keywords: Key words Deciduous ; Evergreen ; Nitrogen ; Potassium ; Specific leaf area
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract This study aimed to identify functional correlates of seedling leaf nutrient content among woody species and to characterise functional species groups with respect to leaf nutrient attributes. Seedlings of 81 woody species from the temperate zone of western Europe were grown in a standard laboratory environment with standard, near-optimal nutrient availability. Weight-based leaf N content (Nwght) was positively correlated with mean relative growth rate (RGR), but the correlation with mean RGR was tighter when leaf N was expressed on a whole-plant weight basis: leaf nitrogen weight ratio (LNWR). Area-based leaf N content (Narea) was not associated with mean RGR, but was closely correlated with the quotient of saturated leaf weight and leaf area. Weight-based leaf K content (Kwght) was a close correlate of the saturated/dry weight ratio of the foliage. Within the lower range, Kwght corresponded with growth-related nutrient attributes, but higher values appeared to indicate succulence or remobilisable stored water. Functional groups of species and genera could be distinguished with respect to seedling leaf nutrient attributes. Deciduous woody climbers and scramblers had consistently higher leaf Nwght, LNWR and (apparently) leaf Kwght than other deciduous species or genera, and shrubs had higher values than trees. These differences seemed due partly to variation in specific leaf area. Evergreens had consistently higher leaf Narea than deciduous plants, but there were no significant differences in weight-based leaf nutrient attributes between these two groups, possibly because of `luxury nutrient consumption' by the slow-growing evergreens. Another functional group was that of the nitrogen-fixing species, which had consistently high innate leaf Nwght compared to non-N-fixers. The ecological significance of the leaf nutrient attributes in this study is discussed by comparing the seedling data with those from field-collected material, and by brief reference to the natural habitats of the species.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Oecologia 34 (1978), S. 297-308 
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The riverine forest formation on the levees along the Orange River in South Africa shows a shift in floristic composition as the river traverses various climatic zones on its course through the temperate area in the eastern parts of the subcontinent, the central semi-desert region, and the desert area near the Atlantic in the west. Leaf size classes and leaf consistency types of the woody species in the riverine forest were determined for each community. Analysis of these data revealed a diversification of leaf sizes as the climate changed from temperate to hot and arid and particularly microphylls became relatively less important and were replaced by smaller leaves in the hot areas. In the same direction malacophylls, which are of the “low-cost, quick-profit” strategy type and are well represented in the temperate, frosty areas, disappear and xeromorphic leaves (“high-cost, slow-profit” strategy type) increase in importance. It is suggested that the cooler conditions with higher wind speeds and higher degrees of average air humidity near the Atlantic coast are reflected by an increase in mesophylls which are sclerophyllous as an adaptation to the frequently and rapidly changing temperature conditions here.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-1939
    Keywords: Nitrogen allocation ; Optimization ; Photosynthesis ; Canopy structure ; Photosynthetic pathway
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract An analytical model was used to describe the optimal nitrogen distribution. From this model, it was hypothesized that the non-uniformity of the nitrogen distribution increases with the canopy extinction rate for light and the total amount of free nitrogen in the canopy, and that it is independent of the slope of the relation between light saturated photosynthesis (Pm) and leaf nitrogen content (nL). These hypotheses were tested experimentally for plants with inherently different architectures and different photosynthetic modes. A garden experiment was carried out with a C3 monocot [rice, Oryza sativa (L.)], a C3 dicot [soybean, Glycine max (L.) Merr] a C4 monocot [sorghum, Sorghum bicolor (L.) Moensch] and a C4 dicot [amarantus, Amaranthus cruentus (L.)]. Leaf photosynthetic characteristics as well as light and nitrogen distribution in the canopies of dense stands of these species were measured. The dicot stands were found to have higher extinction coefficients for light than the monocot stands. Dicots also had more non-uniform N distribution patterns. The main difference between the C3 and C4 species was that the C4 species were found to have a greater slope value of the leaf-level Pm—nL relation. Patterns of N distribution were similar in stands of the C3 and C4 species. In general, these experimental results were in accordance with the model predictions, in that the pattern of nitrogen allocation in the canopy is mainly determined by the extinction coefficient for light and the total amount of free nitrogen.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1432-1939
    Keywords: Canopy structure ; Nitrogen use efficiency Photon absorption ; Photosynthesis ; Species coexistence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Partitioning of nitrogen among species was determined in a stand of a tall herbaceous community. Total amount of nitrogen in the aboveground biomass was 261 mmol N m−2, of which 92% was in three dominant species (Phragmites, Calamagrostis and Carex) and the rest was in the other eight subordinate species. Higher nitrogen concentrations per unit leaf area (n L) with increasing photosynthetically active photon flux density (PPFD) were observed in all species except for three short species. The changes in n L within species were mainly explained by the different nitrogen concentrations per unit leaf mass, while the differences in n L between species were explained by the different SLM (leaf mass per unit leaf area). Photon absorption per unit leaf nitrogen (Φ N ) was determined for each species. If photosynthetic activity was proportional to photon absorption, Φ N should indicate in situ PNUE (photosynthetic nitrogen use efficiency). High Φ N of Calamagrostis (dominant) resulted from high photon absorption per unit leaf area (Φ area ), whereas high Φ N of Scutellaria (subordinate) resulted from low n L although its Φ area was low. Species with cylinder-like “leaves” (Juncus and Equisetum) had low Φ N , which resulted from their high n L. Light-saturated CO2 exchange rates per unit leaf area (CER) and per unit leaf nitrogen (potential PNUE) were determined in seven species. Species with high CER and high n L (Phragmites, Carex and Juncus) had low potential PNUE, while species with low CER and low n L showed high potential PNUE. NUE (ratio of dry mass production to nitrogen uptake) was approximated as a reciprocal of plant nitrogen concentration. In most species, three measures of nitrogen use efficiency (NUE, Φ N and potential PNUE) showed strong conformity. Nitrogen use efficiency was high in Calamagrostis and Scutellaria, intermediate in Phragmites and relatively low in Carex. Nitrogen use efficiency of subordinate species was as high as or even higher than that of dominant species, which suggests that growth is co-limited by light and nitrogen in the subordinate species.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-1939
    Keywords: Canopy structure ; Light ; Nitrogen allocation ; Photosynthesis ; Size hierarchy of individuals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The objective was to investigate how nitrogen allocation patterns in plants are affected by their vertical position in the vegetation (i.e. being either dominant or subordinate). A garden experiment was carried out with Amaranthus dubius L., grown from seed, in dense stands in which a size hierarchy of nearly equally aged individuals had developed. A small number of dominant plants had most of their leaf area in the highest layers of the canopy while a larger number of subordinate plants grew in the shade of their dominant neighbours. Canopy structure, vertical patterns of leaf nitrogen distribution and leaf photosynthetic characteristics were determined in both dominant and subordinate plants. The light distribution in the stands was also measured. Average N contents per unit leaf area (total canopy nitrogen divided by the total leaf area) were higher in the dominant than in the subordinate plants and this was explained by the higher average MPA (leaf dry mass per unit area) of the dominant plants. However, when expressed on a weight basis, average N contents (LNCav; total canopy N divided by the total dry weight of leaves) were higher in the subordinate plants. It is possible that these higher LNCav values reflect an imbalance between carbon and nitrogen assimilation with N uptake exceeding its metabolic requirement. Leaf N content per unit area decreased more strongly with decreasing relative photon flux density in the dominant than in the subordinate plants showing that this distribution pattern can be different for plants which occupy different positions in the light gradient in the canopy. The amount of N which is reallocated from the oldest to the younger, more illuminated leaves higher up in the vegetation may depend on the sink strength of the younger leaves for nitrogen. In the subordinate plants, constrained photosynthetic activity caused by shading might have reduced the sink intensity of these leaves.
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  • 10
    ISSN: 1432-1939
    Keywords: Keywords Vertical light gradient ; Morphological plasticity ; Clonal growth ; Petiole ; Internode
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In natural herbaceous vegetation plants are exposed to a vertical light gradient. In experiments, however, morphogenetic responses of stoloniferous plants to shade have nearly always been tested under homogeneous shade conditions. In this study we simulated a vertical light gradient and found that the response of Hydrocotyle vulgaris in this gradient differed considerably from the responses to homogenous shade. Petioles grew longer while at the same time the specific weight of petioles increased. The elongated petioles raised leaf-blades into better-lit places resulting in higher biomass. Though leaves in the light gradient started their growth under low-light conditions, the size of the leaf-blade was the same as in high light. Internodes were longer than in homogeneous shade conditions but specific weight decreased, probably due to increased allocation to the fast-growing petioles.
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