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Showing 1 to 17 of 17 for “"GEOPHYTES"”.
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What are southern Cape renosterveld geophytes storing in their underground organs?
Geophytes have been extremely successful in the Cape Floristic Region of South Africa, because they possess underground storage organs adapted to unpredictable climates. This study analysed the storage reserves of geophyte species from the southern Cape renosterveld, to determine if reserve …
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The role of geophytes in stone age hunter-gatherer subsistence and human evolution in the greater cape floristic region
… Plants that possess underground storage organs (geophytes) have been put forward as the likely source of starch. Geophytes comprise a large portion of the plant diversity in the Greater Cape Floristic Region (GCFR), where significant archaeological evidence of the evolution of human modernity has …
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The trend towards sociality in three species of southern African mole-rats (Bathyergidae) : causes and consequences
… digestible energy and fibre content of the geophytes on which they feed and nearest-neighbour distances occurring between the belowground portions of the geophytes, may be crucial in determining whether a habitat is suitable for solitary or colonial mole-rats.
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Benchmarks for the future: long-term vegetation change derived form palaeoecological techniques in West-Coast Renosterveld, South Africa
… consisting of asteraceous elements, grasses and geophytes. It is restricted to fertile, fine-grained soils and more than 90% of this vegetation type has been transformed by agriculture. High richness of endemic geophytes in particular gives remaining fragments an irreplaceable conservation value. …
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The effects of fragmentation of South Coast Renosterveld on vegetation patterns and processe
… This vegetation type is particularly rich in geophytes, many of which have highly localised distributions. Almost no research has been carried out on the composition and structure of South Coast Renosterveld. However, fragmentation theory suggests that the fragmentation process iof South Coast …
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Is local plant extinction a product of mutualism breakdown? A case study of the Namaqualand spring flora
… were consequently abundant in disturbed lands. Geophytes were completely eliminated by ploughing, however, the cause of their local extinction is not necessarily due to mutualism breakdown and may be explained by a lack of seed banks. The model was shown to be useful for predicting distribution …
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Phylogeographic structure in the CFR genus Pauridia revealed by inter-simple sequence repeat amplification
… plants. Many, including Pauridia Harv., are geophytes in the Hypoxidaceae. The two species of Pauridia differ in morphology and range, with P. minuta occupying a wide range across lowland CFR and P. longituba being restricted to granite outcrops on the West coast. Genetic structure correlated …
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Sociality in the common mole-rat, Cryptomys hottentotus hottentotus : the effects of aridity
… characteristics was also evident. Although geophytes were clumped at both study localities, the density of geophytes was lower and the distance between geophytes or geophyte clumps concomitantly greater at the arid relative to the mesic site. Differences in resource dispersion in turn …
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A study of the short-term responses of fynbos to fire in the Kogelberg State Forest, South Africa
… is changed for at least one season after a fire. Geophytes are stimulated to flower in abundance after a summer burn but much less so by a spring burn. The spring burn prevented at least one geophyte species from flowering the fol lowing spring which is the flowering time for the species. Records …
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Monkey beetles on the beat: urban monkey beetles reveal opportunities for pollinator habitat management in a South African city
… the connectivity of habitats containing endemic geophytes and spring annuals were considered. These flower populations provide breeding and foraging resources to Hopliini and other pollinators. They are an especially important resource to the group who are unable to move through or exploit the …
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Effect of short term rest on riverine systems associated with heavy grazing in Paulshoek, Namaqualand, South Africa
… had more species tolerant of grazing such as geophytes, annuals and toxic species such as Galenia africana. Heavy grazing in this ecosystem has resulted in increased proportions of unpalatable species with a slow reduction in the number of palatable species. Species cover was significantly …
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A functional analysis of the response of the Southern Kalahari dune vegetation to land-use intensity
… phanerophytes of different size classes, geophytes and herbaceous perennials, as well as herbaceous annuals. These clusters were identifiable even with the inclusion of reproductive traits. Selected vegetative traits are good indicators of plant response to land-use intensity since these …
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Nitrogen and carbon costs of growth and antioxidant production during acclimation to environmental stress in two species of gethyllis
… summerblooming,deciduous and bulbous geophytes that grow naturally in the semi-arid succulent Karoo biome of South Africa. Both species grow under full sun conditions and have four distinctive growth phases: a winter (cold and wet) growing phase, leaf senescence phase towards spring, …
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Long-term impacts of livestock grazing in the Succulent Karoo: A 20-year study of vegetation change under different grazing regimes in Namaqualand
… and life histories (e.g. annuals, perennials, geophytes). Differences in the average % cover as well as the number of species in each of the growth forms were compared across treatments. Differences in shrub volume, mean number of adults and the number of seedlings for each of five key …
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Endemism and richness in the Cape floristic region: phytogeographic patterns and environmental correlates in a global biodiversity hotspot
… plant families, and two ecological guilds, Geophytes and Red Data Listed (RDL) Taxa, were also analysed. Differences between the derivative datasets revealed insights into taxonomically distinct floristic patterns, determined by the dominance of particular floristic/biotic elements within …
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Conserving living landscapes: investigating the impacts of livestock grazing and assessing rangeland restoration potential in Overberg Renosterveld, South Africa
… to growth form categories including forbs, geophytes, annuals, graminoids, succulent shrubs and nonsucculent shrubs and then identified to family, genus or species level. The results of the soil seed bank study were correlated with the vegetation results from Chapter 3 to examine the …
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ΔΟΜΗ, ΔΥΝΑΜΙΚΗ ΚΑΙ ΔΙΑΧΕΙΡΙΣΗ ΤΩΝ ΕΡΗΜΩΝ ΑΣΦΟΔΕΛΩΝ ΤΗΣ ΘΕΣΣΑΛΙΑΣ
THE AIM OF THIS DISSERTATION IS THE STUDY OF THE STRUCTURE AND DYNAMICS OF ASPHODEL DESERTS IN THESSALY AS WELL AS THE CONSIDERATION OF POSSIBLE SCENARIA OF DEGRADATION PROCESSES, BASED ON THE VARIOUS MANAGEMENTAL PRACTICES, LOWLAND PASTURES OF THESSALY. THEREFORE: THE FLORISTIC COMPOSITION OF …