Results 21 to 30 of about 1,067,691 (309)

Radiocarbon and wood anatomy as complementary tools for generating tree-ring records in Bolivia

open access: yesFrontiers in Plant Science, 2023
The science of tropical dendrochronology is now emerging in regions where tree-ring dating had previously not been considered possible. Here, we combine wood anatomical microsectioning techniques and radiocarbon analysis to produce the first tree-ring ...
Arturo Pacheco-Solana   +13 more
doaj   +1 more source

Stable Isotopes in Tree Rings [PDF]

open access: yes, 2022
This Open Access volume highlights how tree ring stable isotopes have been used to address a range of environmental issues from paleoclimatology to forest management, and anthropogenic impacts on forest growth.

core   +2 more sources

The role of the 13C isotope of the Tree Ring in Recording of Carbon Cycle Change in Atmosphere

open access: yesJurnal Ilmu Dasar, 2014
Some natural materials such as tree rings, rocks, sediments, ice cores, coral reefs, shell fish and micro fossil record the chemical, physical and biological changes in atmosphere that had taken place in the past.
E. Ristin Pujiindiyati
doaj   +1 more source

Monthly river flow modeling using earlywood vessel feature changes, and tree-rings

open access: yesEcological Indicators, 2021
Temporal records of river flow as essential data for water resource management plans are not available in many rivers around the world. In this study, monthly discharges of the Taskoh river in the north of Iran were simulated using dendrohydrology (the ...
Vahid Gholami   +2 more
doaj   +1 more source

Annual tree rings in Piptadenia gonoacantha (Mart.) J.F.Macbr. in a restoration experiment in the Atlantic Forest: potential for dendroecological research

open access: yesActa Botânica Brasílica, 2016
The tree Piptadenia gonoachantha is widely used in forestry and in forest restoration projects, which require methods for evaluating tree growth. Long-term studies are necessary to determine patterns and detect changes in species growth rhythms.
Arno Fritz das Neves Brandes   +3 more
doaj   +1 more source

Capturing spiral radial growth of conifers using the superellipse to model tree-ring geometric shape

open access: yesFrontiers in Plant Science, 2015
Tree-rings are often assumed to approximate a circular shape when estimating forest productivity and carbon dynamics. However, tree rings are rarely, if ever, circular, thereby possibly resulting in under- or over-estimation in forest productivity and ...
Pei-Jian eShi   +9 more
doaj   +1 more source

Impact of forest fire on radial growth of tree rings and their element concentrations of Pinus sylvestris and Larix gmelinii in northern China

open access: yesFrontiers in Forests and Global Change, 2023
AimsThrough analyzing the responses of the radial growth and element concentrations (B, Mg, Al, K, Ca, Mn, Fe, Zn, Na, P, Ni, and Cu) of tree rings of two dominant tree species to forest fires, we aimed to investigate the relationship between tree rings ...
Mao Wei   +7 more
doaj   +1 more source

A 241-Year Cryptomeria fortune Tree-Ring Chronology in Humid Subtropical China and Its Linkages with the Pacific Decadal Oscillation

open access: yesAtmosphere, 2020
Humid subtropical China is an “oasis” relative to other dry subtropics of the world due to the prevailing of the East Asian summer monsoon (EASM).
Zhipeng Dong   +8 more
doaj   +1 more source

Tracing volcanic eruptions and anthropogenic pollution in tree rings: preliminary results from synchrotron-light chemical analyses [PDF]

open access: yes, 2023
We analysed larch trees from high elevation in northern Italy for Hg with a Lumex RA-915M Mercury Analyzer with pyrolyzer PYRO-915+) and for S, Zn, Cu, Ni, Pb (by synchrotron light X-ray fluorescence at beamline i18 Diamond Light Source, UK). Hg analyses
Manfredo Capriolo   +9 more
core  

Short communication: Many missing rings in old Canary pines can be related with age, fires and traditional uses

open access: yesForest Systems, 2017
Aim and area of study: In the present paper we estimated the age of four monumental Pinus canariensis of Gran Canaria (Canary Islands, Spain) by means of tree-ring analysis.
Mar Génova   +2 more
doaj   +1 more source

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