A plant macrofossil analysis of changing plant use in the Ivane Valley, Papuan Highlands, PNG

2020 ◽  
Author(s):  
◽  
Elise Matheson
Keyword(s):  
Plant Macrofossil ◽  
Plant Use ◽  
Macrofossil Analysis ◽  
Plant Macrofossil Analysis

Forest history of the last 12 000 years based on plant macrofossil analysis of sediment from Marion Lake, southwestern British Columbia

1987 ◽  
Vol 65 (11) ◽  
pp. 2179-2187 ◽  
Author(s):  
Newton Wainman ◽  
Rolf W. Mathewes
Keyword(s):  
British Columbia ◽  
Forest History ◽  
Thuja Plicata ◽  
Taxus Brevifolia ◽  
Good Correspondence ◽  
Plant Macrofossil ◽  
Macrofossil Analysis ◽  
Red Cedar ◽  
High Runoff ◽  
Plant Macrofossil Analysis

The forest history around Marion Lake in southwestern British Columbia is reconstructed using plant macrofossil analysis. A comparison with a previous reconstruction based on pollen and spore analysis reveals a good correspondence between pollen and macrofossil zones. Significant improvements in the reconstruction of forest history are possible by combining the study of pollen and macrofossils. Thuja plicata macrofossils do not appear at Marion Lake until 6000 BP, contradicting previous suggestions of red cedar presence as early as 10 000 BP. Although not common at present, Taxus brevifolia may have been an important component of the forest prior to the arrival of Thuja. Fluvial input of macrofossils is important at Marion Lake. Charcoal also appears to enter the lake primarily during periods of high runoff and erosion in the watershed, suggesting the need for caution in the interpretation of charcoal data from stream-fed lakes. Increases in total influx coincide with evidence for increased precipitation after 7000 BP. Marked reductions in macrofossil influx coincide with periods of peat deposition upstream from the present lake. Relative percentages of conifer needles are unaffected by changes in influx.

History of the endangered thread-leaved sundew (Drosera filiformis) in southern Nova Scotia

2005 ◽  
Vol 83 (1) ◽  
pp. 14-21 ◽  
Author(s):  
Mark Landry ◽  
Les C Cwynar
Keyword(s):  
Nova Scotia ◽  
Residence Time ◽  
Radiocarbon Dating ◽  
Plant Macrofossil ◽  
Radiocarbon Age ◽  
Macrofossil Analysis ◽  
The Past ◽  
History Of ◽  
Minimum Residence Time ◽  
Plant Macrofossil Analysis

We used the techniques of plant macrofossil analysis and radiocarbon dating to determine the minimum residence time of the endangered thread-leaved sundew (Drosera filiformis Raf.) in three bogs of southern Nova Scotia. The minimum residence times are 4240 cal. year BP for Swain's Road Bog, 2050 cal. year BP for Villagedale Bog, and very recent (modern radiocarbon age) for Port La Tour Bog, indicating that the species has likely been in the region for the past 4240 years. Analysis of nearby Old School Road Bog, which lacks D. filiformis today, failed to find any evidence that it formerly occurred there, suggesting that it may not have been more widespread in the past than it is today.Key words: Drosera filiformis, thread-leaved sundew, plant macrofossil analysis, radiocarbon dating, bogs, minimum residence time.

Ubaid plant use at Tell Zeidan, Syria

Paléorient ◽  
2015 ◽  
Vol 41 (2) ◽  
pp. 51-69 ◽  
Author(s):  
Alexia Smith ◽  
Philip J. Graham ◽  
Gil J. Stein
Keyword(s):  
Plant Use

scholarly journals Impacts of vegetation and palaeohydrological changes on the n-alkane composition of a Holocene peat sequence from the Upper Vistula Valley (southern Poland)

2021 ◽  
Author(s):  
Sylwia Skreczko ◽  
Artur Szymczyk ◽  
Weronika Nadłonek
Keyword(s):  
Vegetation Change ◽  
Higher Plants ◽  
Large River ◽  
Gas Chromatography Mass Spectrometry ◽  
Botanical Composition ◽  
Central European ◽  
Plant Macrofossil ◽  
Southern Poland ◽  
River Valleys ◽  
Palaeoenvironmental Conditions

Abstract Purpose The analysis of n-alkanes in palaeoenvironmental studies of peatlands is mainly limited to ombrogenous peatlands which are a rare feature in the environment. Using n-alkane and plant macrofossil analysis, we have tracked changes in the environment in the valley of a large Central European river. We tested the possibilities for applying such studies to low-moor bogs which are the most commonly occurring type of bog in the world. Materials and methods Representative peat samples were taken from two profiles in a peatland located in the Vistula Valley (southern Poland), and they were analysed for the occurrence and distribution of biomarkers. The distribution of n-alkanes was determined using gas chromatography-mass spectrometry (GC–MS). The botanical composition of the samples was determined by analysis of plant macrofossil remains, and the degree of peat decomposition was also determined. Results and discussion Samples of low-moor peat were characterised by a prevalence of medium- and long-chain n-alkane homologues, which is typical for higher plants. The variable values of the CPI, CPI (25–31), and the C23/C25 ratio have provided information on the stages of formation of the Zapadź bog. The source of n-alkane differentiation is vegetation change related to palaeohydrological dynamics and palaeoenvironmental conditions within the peatland. Conclusions We have shown that analysis of n-alkanes can be successfully used in low-moor bogs as a complement to palaeobotanical and palaeozoological methods. The bringing together of these types of research enables changes in the ecosystems of large river valleys to be tracked.

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