The Selection of Sites for Paleovegetational Studies

Jacobson, George L.; Bradshaw, Richard

doi:10.1016/0033-5894(81)90129-0

Cited by 910 publications

(561 citation statements)

References 51 publications

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“…Pollen has many dispersal methods, including wind, water and animal vectors, all of which have the capability to transport pollen outside of the local area. Tauber ( 1965, in Moore et al 1991 Jacobson and Bradshaw (1981) Pollen analysis of surface sediments has also shown that some pollen types may be overor under-represented in the pollen record. This is due to differences in the amount of pollen produced and the methods in which the pollen is dispersed.…”

Section: Pollen Dispersalmentioning

confidence: 99%

Mangrove pollen of Indonesia and its suitability as a sea-level indicator

et al. 2007

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The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source• a link is made to the metadata record in Durham E-Theses• the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders. Mangrove Pollen of Indonesia and its Suitability as a Sea-Level IndicatorThe copyright of this thesis rests with the author or the university to which it was submitted. No quotation from it, or information derived from it may be published without the prior written consent of the author or university, and any information derived from it should be acknowledged. Simon Edward EngelhartThesis The copyright of this thesis rests with the author. No quotations from it should be published without his prior written consent and information derived from it should be acknowledged.11 AcknowledgemeBlts I would like to thank all those people who have helped in the production of this thesis.

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Section: Pollen Dispersalmentioning

confidence: 99%

Mangrove pollen of Indonesia and its suitability as a sea-level indicator

et al. 2007

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“…About thirty years ago, palynological researchers began to produce quantitative estimates of a pollen source area for basins of different sizes (Jacobson and Bradshaw, 1981). The Prentice model of pollen dispersal and deposition (Prentice, 1985) allowed simulation of aerial pollen taphonomy to be used to estimate quantitative source areas for individual pollen types (Prentice et al, 1987), defined as the radius around the basin from which a defined percentage of the pollen type originated.…”

Section: Introductionmentioning

confidence: 99%

Pollen source areas of lakes with inflowing rivers: modern pollen influx data from Lake Baiyangdian, China

Tian

Bunting

et al. 2012

Quaternary Science Reviews

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a b s t r a c tComparing pollen influx recorded in traps above the surface and below the surface of Lake Baiyangdian in northern China shows that the average pollen influx in the traps above the surface is much lower, at 1210 grains cm À2 a À1 (varying from 550 to 2770 grains cm À2 a À1 ), than in the traps below the surface which average 8990 grains cm À2 a À1 (ranging from 430 to 22310 grains cm À2 a À1 ). This suggests that about 12% of the total pollen influx is transported by air, and 88% via inflowing water. If hydrophyte pollen types are not included, the mean pollen influx in the traps above the surface decreases to 470 grains cm À2 a À1 (varying from 170 to 910 grains cm À2 a À1 ) and to 5470 grains cm À2 a À1 in the traps below the surface (ranging from 270 to 12820 grains cm À2 a À1 ), suggesting that the contribution of waterborne pollen to the non-hydrophyte pollen assemblages in Lake Baiyangdian is about 92%. When trap assemblages are compared with sedimentewater interface samples from the same location, the differences between pollen assemblages collected using different methods are more significant than differences between assemblages collected at different sample sites in the lake using the same trapping methods. We compare the ratios of terrestrial pollen and aquicolous pollen types (T/A) between traps in the water and aerial traps, and examine pollen assemblages to determine whether proportions of long-distance taxa (i.e. those known to only grow beyond the estimated aerial source radius); these data suggest that the pollen source area of this lake is composed of three parts, an aerial component mainly carried by wind, a fluvial catchment component transported by rivers and another waterborne component transported by surface wash. Where the overall vegetation composition within the 'aerial catchment' is different from that of the hydrological catchment, the ratio between aerial and waterborne pollen influx offers a method for estimating the relative importance of these two sources, and therefore a starting point for defining a pollen source area for a lake with inflowing rivers.

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“…Although these study sites have provided detailed information about the nature and timing of human impact it is difficult to make inferences about the spatial extent of human impact on the landscape (Edwards 1979;Brown 1999). This is due to the scale of their pollen source areas, which is likely to be regional in nature (Jacobsen and Bradshaw 1981;Prentice 1985).…”

Section: Introductionmentioning

confidence: 99%

“…The question of the size of the pollen source area has been discussed by Jacobsen and Bradshaw (1981), and more recent attempts have been made to quantify aspects of pollen source area (Prentice 1985;Sugita 1993Sugita , 1994Sugita , 1998. For sites within the size range used in this study, the local and extra-local relevant source area should be in the order of hundreds of metres (Jacobsen and Bradshaw 1981). The sites are located beyond the present-day margins of the enclosed landscape on the southern upland fringes of Greater Exmoor (around 300 to 340 m OD).…”

Section: Introductionmentioning

confidence: 99%

Mid- to late-Holocene vegetation history of Greater Exmoor, UK: estimating the spatial extent of human-induced vegetation change

Fyfe

Brown

Rippon

2003

Vegetation History and Archaeobotany

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This paper presents the results from three pollen profiles from a group of small spring mire sites on the southern edge of Exmoor in south west England. The size and topography of these sites allow detailed local landscape histories around each site to be reconstructed which broadly cover the mid-to late-Holocene. Comparison of the individual local landscape histories demonstrates the scale of spatial variation in vegetation around the upland edge, and facilitates understanding of human-landscape interactions from the early Neolithic onward. In the early Neolithic significant short-term woodland disturbance is recorded around the upland fringe, including clearance of oakhazel-elm woodland, suggesting that the shift from Mesolithic to Neolithic is not marked by a gradual environmental transition. Following this, there is clear evidence of Neolithic management of upland heath using fire, presumably for the management of upland grazing. Woodland clearances are recorded throughout the later Prehistoric period; however, the use of multiple profiling suggests that woodland clearance is spatially discrete, even within an area of 4 km 2 .Pastoral land use is dominant around the uplands until around A.D. 900-1000 and there is no discernible Roman or post-Roman period impact in the vegetation, suggesting cultural stability from the late Iron Age to the early Medieval period. By A.D. 1100 there is a shift to a mixed arable-pastoral farming which appears to continue well into the post-medieval period.

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The Selection of Sites for Paleovegetational Studies

Cited by 910 publications

References 51 publications

Mangrove pollen of Indonesia and its suitability as a sea-level indicator

Mangrove pollen of Indonesia and its suitability as a sea-level indicator

Pollen source areas of lakes with inflowing rivers: modern pollen influx data from Lake Baiyangdian, China

Mid- to late-Holocene vegetation history of Greater Exmoor, UK: estimating the spatial extent of human-induced vegetation change

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