Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"pollen influx"”.
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Variability within the 10-year pollen rain of a seasonal neotropical forest
… on the abundance and composition of Neotropical pollen rain was investigated using ten years of seasonal aerial pollen samples from Barro Colorado Island (BCI), Panama. Using canonical correspondence analysis, we identified the environmental variables that most account for intra-annual and …
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The Pollination Ecology of Four Species of Local Vernal Herbaceous Angiosperms
… anthesis, the third were isolated from foreign pollen by placing them in plastic bags and the fourth were both isolated and emasculated. By controlling pollen influx in each category, the main mode of reproduction could be determined on the basis of fruit and seed production. Visiting insects …
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The vegetational and archaeological history of the Ingleborough Massif, North Yorkshire
… the Ingleborough Massif was investigated using pollen and macrofossil analysis of peat deposits in conjunction with radiocarbon dating. A transect was taken across the massif, running northwest to south-east, and peat deposits were sampled at intervals, as close to the transect as possible. This …
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Setting the Holocene clock using varved lake sediments in Sweden
… two varved lake sediment sequences in N Sweden. Pollen influx rates indicate that the regional vegetation in this area responded rapidly (within 75 years) to the onset and end of this 300-year long cold climate anomaly and that the forest ecosystem was severely stressed.
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Tree-limit ecotonal response to Holocene climate change in the Scandes Mountains of west-central Sweden
… ecotone were studied mainly by means of pollen and plant macrofossil analysis of two lake sediment sequences (Lakes Stentjärn and Spåime), located above the present-day tree-limit. The lake sediments were also subjected to high-resolution elemental and mineral magnetic measurements, which …