Identification

Title

Evaluation of tropical forests sensitivity to past climate changes (FORSENS) (NERC grant NE/J018562/1)

Abstract

The dataset is the output of a NERC fellowship aimed to understand the long-term dynamics of tropical vegetation through palaeoecological analysis. For doing this, two sedimentary archives (Laguna Pindo and Laguna Baños) from Ecuador were radiocarbon dated and analysed for pollen, non-pollen palynomorphs, charcoal, chironomids, stable isotopes and XRF of tephra deposits. Each proxy was analysed at different resolution. Laguna Pindo is a mid-elevation lake (1250 m asl) that spans the last 50,000 years. Laguna Baños is an Andean lake located at 3800 m asl and contains sediments representative of the last 6500 years. Both water bodies are very shallow. The data is presented mainly in excel spreadsheets as raw data (except for radiocarbon dating data, which are the PDF files provided by NRCF), without any math treatment or conversion. Publication associated with NERC grant, Frazer Matthews-Bird, Stephen J. Brooks, Philip B. Holden, Encarni Montoya, and William D. Gosling (2016), Inferring late-Holocene climate in the Ecuadorian Andes using a chironomid-based temperature inference model. Clim. Past, 12, 1263-1280, 2016. doi:10.5194/cp-12-1263-2016

Resource type

dataset

Resource locator

http://www.bgs.ac.uk/services/ngdc/accessions/index.html#item73130

function: download

http://www.bgs.ac.uk/services/ngdc/accessions/index.html#item164605

name: Data

function: download

https://doi.org/10.5194/cp-12-1263-2016

name: Published Paper

function: download

Unique resource identifier

code

http://data.bgs.ac.uk/id/dataHolding/13607029

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Additional information source

NERC grant NE/J018562/1. This grant is linked to NERC studentship grant NE/J500288/1, see metadata entry 13606924.

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

publication

effective date

2008-06-01

Keyword set

keyword value

Holocene

Palaeoecology

Quaternary

Climatology

NGDC Deposited Data

originating controlled vocabulary

title

reference date

date type

revision

effective date

2022

Keyword set

keyword value

Keyword set

keyword value

NERC_DDC

Geographic location

West bounding longitude

-78.0000

East bounding longitude

-64.0000

North bounding latitude

0.0000

South bounding latitude

-17.0000

Extent

Extent group

authority code

title

reference date

date type

creation

effective date

1979

code identifying the extent

ANDES [id=842000]

Extent group

authority code

title

reference date

date type

revision

effective date

2009

code identifying the extent

BO

Extent group

authority code

title

reference date

date type

revision

effective date

2009

code identifying the extent

BOL

Extent group

authority code

title

reference date

date type

creation

effective date

1979

code identifying the extent

BOLIVIA [id=867000]

Extent group

authority code

title

reference date

date type

revision

effective date

2009

code identifying the extent

EC

Extent group

authority code

title

reference date

date type

revision

effective date

2009

code identifying the extent

ECU

Extent group

authority code

title

reference date

date type

creation

effective date

1979

code identifying the extent

ECUADOR [id=863000]

Extent group

authority code

title

reference date

date type

revision

effective date

2009

code identifying the extent

PE

Extent group

authority code

title

reference date

date type

revision

effective date

2009

code identifying the extent

PER

Extent group

authority code

title

reference date

date type

creation

effective date

1979

code identifying the extent

PERU [id=864000]

Temporal reference

Temporal extent

Begin position

End position

2015-10

Dataset reference date

date type

publication

effective date

2016-06

Frequency of update

notApplicable

Quality and validity

Lineage

Collection of the sedimentary archives (field work to Ecuador). The recovery of the sediments was performed from a wooded platform on the lakes supported in inflatable boats using a Livingstone corer. - Storage in a cold room based at the Open University (UK) until splitting the cores. - Subsampling the cores using a syringe of 1cc volume. LAB TREATMENT FOR PALYNOLOGICAL ANALYSES (proxies analysed: pollen ,non-pollen palynomorphs, and microcharcoal) - Acid digestion using hot: KOH at 10%, Na4P2O7 at 2.66%, HCl at 10%, HF at 40%, and acetolisis mixture (mix of (CH3CO)2O at 97% and H2SO4 at 95-98% in a proportion of 9:1). Palynological residues obtained from the treatment were mounted in glycerine. LAB TREATMENT FOR CHIRONOMIDS ANALYSIS - Disaggregation of the sediment using hot KOH at 10% - Dehydration of the chironomids head capsules by sequential imbibition using: ethanol (80%), ethanol (100%), and euparal essence. Final mounting in slides using euparal. LAB TREATMENT FOR STABLE ISOTOPES ANALYSIS - Drying of samples at 40ºC - Crushing of the dried sediments to a fine powder - Decalcification: add 0.1M and 1.0M of HCl; dry samples overnight at 40ºC, and transfer the samples to Sn capsules for the analysis LAB TREATMENT FOR XRF ANALYSIS - Drying of samples overnight at 110 °C - Crushing of the dried sediments to a fine powder - Loss-on-ignition was performed on 1.2 g of the powdered sub-sample; the sub-sample was ignited for one hour in a furnace set at 1000 °C - Glass discs were then created using 0.7000 g of the remaining powdered sub-sample and 3.6300 g of lithium metaborate flux - The powder/flux mix was then placed into a muffle furnace at 1100 °C for 20 minutes in order to melt the mixture - When homogenised, the melt was poured into a heated brass mould and a plunger was pressed down steadily, forming the glass disc - The samples (in glass discs) were analysed on an ARL 8420+ dual goniometer wavelength dispersive XRF spectrometer.

Conformity

Conformity report

specification

title

reference date

date type

publication

effective date

2011

degree

false

explanation

See the referenced specification

Conformity report

specification

title

reference date

date type

publication

effective date

2010-12-08

degree

false

explanation

See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Limitations on public access

Constraint set

Limitations on public access

The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.

Responsible organisations

Responsible party

contact position

School of Environment, Earth & Ecosystem Sciences

organisation name

Open University

email address

not available

responsible party role

originator

Responsible party

contact position

School of Environment, Earth & Ecosystem Sciences

organisation name

Open University

email address

not available

responsible party role

principalInvestigator

Responsible party

organisation name

British Geological Survey

email address

not available

responsible party role

distributor

Responsible party

organisation name

British Geological Survey

email address

not available

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact

organisation name

British Geological Survey

full postal address

Environmental Science Centre,Keyworth

NOTTINGHAM

NG12 5GG

United Kingdom

telephone number

+44 115 936 3100

email address

enquiries@bgs.ac.uk

responsible party role

pointOfContact

Metadata date

2025-03-24

Metadata language