Testing for stationary dynamics in the Barro Colorado Island forest

We analyse population dynamics in Barro Colorado Island (Panama) using census data of a 50 ha forest plot spanning 35 years, and address the question whether this community is in a stationary state. Individual species abundances show large fluctuations, but assessing stationariety requires discrimin...

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Autores principales: Cavagna, Andrea, Fort, Hugo, Grigera, Tomás Sebastián
Formato: Articulo
Lenguaje:Inglés
Publicado: 2023
Materias:
Física
Ecología
Rainforest
Ecosystem dynamics
Fluctuations
Time correlations
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/159775
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-159775
record_format dspace
spelling I19-R120-10915-1597752023-11-03T20:07:00Z http://sedici.unlp.edu.ar/handle/10915/159775 Testing for stationary dynamics in the Barro Colorado Island forest Cavagna, Andrea Fort, Hugo Grigera, Tomás Sebastián 2023 2023-11-03T17:39:32Z en Física Ecología Rainforest Ecosystem dynamics Fluctuations Time correlations We analyse population dynamics in Barro Colorado Island (Panama) using census data of a 50 ha forest plot spanning 35 years, and address the question whether this community is in a stationary state. Individual species abundances show large fluctuations, but assessing stationariety requires discriminating random fluctuations from actual trends. This requires evaluating mean quantities as well as the structure (i.e. the correlations) of the fluctuations around this mean. We argue that a species average is the best surrogate for the theoretically required but unfeasible history average. We define the overlap, a species-averaged measure of composition similarity, which reveals that the BCI population dynamics is stationary but not static, displaying fluctuations with a characteristic time of around 15 years, two orders of magnitude less than previously estimated. Instituto de Física de Líquidos y Sistemas Biológicos Articulo Articulo http://creativecommons.org/licenses/by-nc-nd/4.0/ Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) application/pdf
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Ecología
Rainforest
Ecosystem dynamics
Fluctuations
Time correlations
spellingShingle Física
Ecología
Rainforest
Ecosystem dynamics
Fluctuations
Time correlations
Cavagna, Andrea
Fort, Hugo
Grigera, Tomás Sebastián
Testing for stationary dynamics in the Barro Colorado Island forest
topic_facet Física
Ecología
Rainforest
Ecosystem dynamics
Fluctuations
Time correlations
description We analyse population dynamics in Barro Colorado Island (Panama) using census data of a 50 ha forest plot spanning 35 years, and address the question whether this community is in a stationary state. Individual species abundances show large fluctuations, but assessing stationariety requires discriminating random fluctuations from actual trends. This requires evaluating mean quantities as well as the structure (i.e. the correlations) of the fluctuations around this mean. We argue that a species average is the best surrogate for the theoretically required but unfeasible history average. We define the overlap, a species-averaged measure of composition similarity, which reveals that the BCI population dynamics is stationary but not static, displaying fluctuations with a characteristic time of around 15 years, two orders of magnitude less than previously estimated.
format Articulo
Articulo
author Cavagna, Andrea
Fort, Hugo
Grigera, Tomás Sebastián
author_facet Cavagna, Andrea
Fort, Hugo
Grigera, Tomás Sebastián
author_sort Cavagna, Andrea
title Testing for stationary dynamics in the Barro Colorado Island forest
title_short Testing for stationary dynamics in the Barro Colorado Island forest
title_full Testing for stationary dynamics in the Barro Colorado Island forest
title_fullStr Testing for stationary dynamics in the Barro Colorado Island forest
title_full_unstemmed Testing for stationary dynamics in the Barro Colorado Island forest
title_sort testing for stationary dynamics in the barro colorado island forest
publishDate 2023
url http://sedici.unlp.edu.ar/handle/10915/159775
work_keys_str_mv AT cavagnaandrea testingforstationarydynamicsinthebarrocoloradoislandforest
AT forthugo testingforstationarydynamicsinthebarrocoloradoislandforest
AT grigeratomassebastian testingforstationarydynamicsinthebarrocoloradoislandforest
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