Uncertainty in the detection of disturbance spatial patterns in temperate forests

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027073%3A_____%2F16%3AN0000019" target="_blank" >RIV/00027073:_____/16:N0000019 - isvavai.cz</a>

Alternative codes found

RIV/62156489:43410/16:43910762

Result on the web

<a href="http://www.sciencedirect.com/science/article/pii/S1125786515000892" target="_blank" >http://www.sciencedirect.com/science/article/pii/S1125786515000892</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.dendro.2015.12.002" target="_blank" >10.1016/j.dendro.2015.12.002</a>

Result language

angličtina

Original language name

Uncertainty in the detection of disturbance spatial patterns in temperate forests

Original language description

The use of individual-based models in the study of the spatial patterns of disturbances has opened new horizons in forest ecosystem research. However, no studies so far have addressed (i) the uncertainty in geostatistical modelling of the spatial relationships in dendrochronological data, (ii) the number of increment cores necessary to study disturbance spatial patterns, and (iii) the choice of an appropriate geostatistical model in relation to disturbance regime. In addressing these issues, we hope to contribute to advances in research methodology as well as to improve interpretations and generalizations from case studies. We used data from the beech-dominated Žofínský Prales forest reserve (Czech Republic), where we cored 3020 trees on 74 ha. Block bootstrap and geostatistics were applied to the data, which covered five decades with highly different disturbance histories. This allowed us to assess the general behavior of various mathematical models. Uncertainty in the spatial patterns and stability of the models was measured as the length of the 95% confidence interval (CI) of model parameters. The results suggest that with a sample size of 1000–1400 cores and a properly chosen model, one reaches a certain precision in estimation that does not increase significantly with growing sample size. It appears that in temperate old-growth forests controlled by fine-scale disturbances, it is necessary to have at least 500 cores to estimate sill, nugget and relative nugget, while to estimate practical range at least 1000 cores are needed. When choosing the best model, the stability of the model should be considered together with the value of AIC. Our results indicate the general limits of disturbance spatial pattern studies using dendrochronological and geostatistical methods, which can be only partially overcome by sample size or sampling design.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

GK - Forestry

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

DENDROCHRONOLOGIA

ISSN

1125-7865

e-ISSN

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Volume of the periodical

37

Issue of the periodical within the volume

March 2016

Country of publishing house

DE - GERMANY

Number of pages

11

Pages from-to

46-56

UT code for WoS article

000386868300005

EID of the result in the Scopus database

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