Reconstructing Long-Term Forest Changes from Fossil-Pollen Data

1987 ◽  
pp. 62-84
Author(s):  
Paul A. Delcourt ◽  
Hazel R. Delcourt
Keyword(s):  
Fossil Pollen ◽  
Pollen Data

scholarly journals Long Term Land-Cover Changes on Regional to Global Scales Inferred From Fossil Pollen – How to Meet the Challenges of Climate Research?

PAGES news ◽  
2000 ◽  
Vol 8 (3) ◽  
pp. 30-32 ◽  
Author(s):  
Marie-José Gaillard ◽  
S Sugita ◽  
A Broström ◽  
M Eklöf ◽  
P Pilesjö
Keyword(s):  
Land Cover ◽  
Land Cover Changes ◽  
Fossil Pollen ◽  
Climate Research

A 1 Ma record of climate-induced vegetation changes using sed aDNA and pollen in a biodiversity hotspot: Lake Towuti, Sulawesi, Indonesia

2021 ◽  
Author(s):  
Akhtar-E Ekram ◽  
Rebecca Hamilton ◽  
Matthew Campbell ◽  
Chloe Plett ◽  
Sureyya Kose ◽  
...  
Keyword(s):  
Relative Abundance ◽  
Carbon Fixation ◽  
Biodiversity Hotspot ◽  
Fossil Pollen ◽  
Vegetation Changes ◽  
Pollen Record ◽  
River Channels ◽  
Sedimentary Record ◽  
Lake Towuti

<p>Several studies have shown that ancient plant-derived DNA can be extracted and sequenced from lake sediments and complement the analysis of fossil pollen in reconstructing past vegetation responses to climate variability and anthropogenic perturbations. The majority of such studies have been performed on Holocene lakes located in cooler higher latitude regions whereas similar studies from tropical lakes are limited. Here, we report a ~1 Ma record of vegetation changes in tropical Lake Towuti (Sulawesi, Indonesia) through parallel pollen and sedimentary ancient DNA (sed aDNA) analysis. Lake Towuti is located in a vegetation biodiversity hotspot and in the centre of the Indo Pacific Warm Pool (IPWP), which comprises the world’s warmest oceanic waters and influences globally important climate systems. In the context of global change, the surface area of the IPWP is rapidly expanding. Lake Towuti is of particular interest since it provides a unique opportunity to obtain a long-term record of IPWP-controlled climate-ecosystem interactions and ecosystem resilience. Stratigraphic analysis of fossil pollen vs. sequencing of preserved chloroplast DNA (cpDNA) signatures (i.e., trnL-P6) both revealed that Lake Towuti experienced significant vegetation changes during the transition from a landscape initially characterized by active river channels, shallow lakes and swamps into a permanent lake ~1 Ma ago. Both proxies marked a predominance of trees or shrubs during most of Lake Towuti’s history, but the trnL-P6 barcoding approach revealed a much higher relative abundance of remote montane conifers, which likely have produced large amounts of chloroplast-rich airborne pollen that were subsequently buried in the sedimentary record. The pollen record showed a higher relative abundance of evergreen tropical forest vegetation, whereas the trnL-P6 record revealed a higher relative abundance of predominantly wetland herbs that must have entered the lake from the local catchment in the form of chloroplast-rich litter. Furthermore, the sedimentary record was rich in presumably wind-derived chloroplast-lacking fern spores, while fern trnL-P6 was only sporadically detected. Only through trnL-P6 barcoding, fern-derived biomass in the sedimentary record could be identified as Schizaeaceae, which is a primitive tropical grass-like fern family often associated with swampy or moist soils. Unlike pollen, trnL-P6 could identify grasses at clade and subfamily levels and confirmed that the majority of grasses in the area represented wet climate C3 grasses or those that can switch between C3 and C4 carbon fixation pathways, whereas grasses that can only perform C4 carbon fixation, indicative of dry climate conditions, were not detected. At least for sediments deposited prior to the Last Glacial Maximum, neither pollen nor trnL-P6 revealed significant vegetation changes between alternating layers of lacustrine green and red sideritic clays thought to have been deposited during orbitally controlled wetter vs. drier periods. These preliminary results suggest that vegetation in this tropical biodiversity hotspot may be relatively resilient to long-term variations in IPWP hydrology.</p>

The effects of seasonal and long-term climatic variability on Neotropical flowering phenology: An ecoinformatic analysis of aerial pollen data

2017 ◽  
Vol 41 ◽  
pp. 54-63 ◽  
Author(s):  
Derek S. Haselhorst ◽  
David K. Tcheng ◽  
J. Enrique Moreno ◽  
Surangi W. Punyasena
Keyword(s):  
Climatic Variability ◽  
Flowering Phenology ◽  
Pollen Data

scholarly journals Landscape Change and Trade in Ancient Greece: Evidence from Pollen Data

2020 ◽  
Vol 130 (632) ◽  
pp. 2596-2618
Author(s):  
Adam Izdebski ◽  
Tymon Słoczyński ◽  
Anton Bonnier ◽  
Grzegorz Koloch ◽  
Katerina Kouli
Keyword(s):  
Environmental History ◽  
Agricultural Production ◽  
Landscape Change ◽  
Vegetation Change ◽  
Structural Changes ◽  
Ancient Greece ◽  
Pollen Data ◽  
Trade Expansion ◽  
Southern Greece

Abstract In this article we use pollen data from six sites in southern Greece to study long-term vegetation change in this region from 1000 BCE to 600 CE. Based on insights from environmental history, we interpret our estimated trends in the regional presence of cereal, olive and vine pollen as proxies for structural changes in agricultural production. We present evidence that there was a market economy in ancient Greece and a major trade expansion several centuries before the Roman conquest. Our results are consistent with auxiliary data on settlement dynamics, shipwrecks and ancient oil and wine presses.

Holocene palynology: I principles, population and community ecology, palaeoclimatology

1991 ◽  
Vol 15 (3) ◽  
pp. 261-289 ◽  
Author(s):  
Glen M. MacDonald ◽  
Kevin J. Edwards
Keyword(s):  
Population Biology ◽  
Plant Population ◽  
Fossil Pollen ◽  
Pollen Data ◽  
Plant Populations ◽  
Climate Reconstructions ◽  
Large Databases ◽  
Temporal And Spatial ◽  
The Relationship ◽  
Important Progress

The latter half of the past decade witnessed important progress in elucidating the principles of fossil pollen analysis and in the application of palynology to the study of palaeoecology and palaeoclimatology. Areas with particularly notable efforts include: 1) the theoretical consideration of the spatial representation of fossil pollen records and the relationships of pollen proportions to the abundance of contributing plant populations; 2) the quest for palynological data with increasingly fine temporal and spatial resolution; 3) the development of large databases of modern and fossil pollen data for macroscale palaeoecological and palaeoclimatic studies; 4) the application of palynology to questions of plant population biology, most notably the study of plant invasion and implications for invading and pre-existing plant populations; 5) the demonstration of the relatively ephemeral nature of major vegetation types; 6) the refinement and development of techniques for providing quantitative estimates of past climate and testing climate reconstructions. Despite this progress important uncertainties remain regarding the relationship between plant abundance and pollen representation and the nature of climate-vegetation relationships, particularly at the meso- and microscales. Resolution of these questions is particularly important for plant population and climatic studies based on fossil pollen data.

Numerical Analysis of Modern and Fossil Pollen Data from the Tibetan Plateau

2008 ◽  
Vol 98 (4) ◽  
pp. 755-772 ◽  
Author(s):  
Caiming Shen ◽  
Kam-biu Liu ◽  
Lingyu Tang ◽  
Jonathan T. Overpeck
Keyword(s):  
Numerical Analysis ◽  
Tibetan Plateau ◽  
Fossil Pollen ◽  
The Tibetan Plateau ◽  
Pollen Data

Long-term land-cover/use change in a traditional farming landscape in Romania inferred from pollen data, historical maps and satellite images

2016 ◽  
Vol 17 (8) ◽  
pp. 2193-2207 ◽  
Author(s):  
Angelica Feurdean ◽  
Catalina Munteanu ◽  
Tobias Kuemmerle ◽  
Anne B. Nielsen ◽  
Simon M. Hutchinson ◽  
...  
Keyword(s):  
Land Cover ◽  
Satellite Images ◽  
Historical Maps ◽  
Pollen Data ◽  
Traditional Farming

scholarly journals Spatial Development of the 1507–1510 Plague in Poland and Its Consequences. Kalisz District Case Study

2020 ◽  
Vol 13 (1-2) ◽  
pp. 1-12
Author(s):  
Tomasz Związek
Keyword(s):  
Weather Conditions ◽  
Pollen Data ◽  
Climatic Extremes ◽  
Basic Goods ◽  
Droughts And Floods ◽  
Rural Sites ◽  
Long Term Impact ◽  
Settlement Changes

AbstractThe article discusses the causes and effects of the plague which is said to have spread over many Polish towns in 1507. The focus is on its possible causes, related to the occurrence of droughts and floods in Central Europe in the late 15th and early 16th century. Available sources from the late mediaeval period have also been analysed for the recorded perceptions of the extreme climatic and weather conditions. Special attention has been paid to the issues of intensity and spatial distribution of the effects of the plague on the example of one district. The analysis covered a variety of issues such as settlement changes, prices of basic goods or even some pollen data. The main results of the study indicate that the climatic extremes at the turn of the 16th century exerted a long-term impact on the society and economy of the region. They also contributed to the abandonment of settlements on rural sites.

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