Growth of male and female Araucaria araucana trees respond differently to regional mast events, creating sex-specific patterns in their tree-ring chronologies

Araucaria araucana is a dioecious evergreen conifer endemic from temperate forests of south Argentina and Chile. It is a long-lived species (maximum age > 1000 years), and it presents a high potential for tree-ring based climate reconstructions. However, the species’ dioecious habit can result in...

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Autores principales:	Martín A. Hadad, Fidel A. Roig, Julieta G. Arco Molina, Andrew Hacket-Pain
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Carbon allocation Dendroecology Trade-off Dendroclimatology Patagonia Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/917572c215ae486490f8edae9d897dab
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spelling	oai:doaj.org-article:917572c215ae486490f8edae9d897dab2021-12-01T04:40:15ZGrowth of male and female Araucaria araucana trees respond differently to regional mast events, creating sex-specific patterns in their tree-ring chronologies1470-160X10.1016/j.ecolind.2020.107245https://doaj.org/article/917572c215ae486490f8edae9d897dab2021-03-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X20311845https://doaj.org/toc/1470-160XAraucaria araucana is a dioecious evergreen conifer endemic from temperate forests of south Argentina and Chile. It is a long-lived species (maximum age > 1000 years), and it presents a high potential for tree-ring based climate reconstructions. However, the species’ dioecious habit can result in distinct sex-specific growth patterns, which introduce novel challenges in the interpretation of tree-ring chronology variations. We used a network of 10 tree-ring chronologies from northwest Patagonia (Argentina) to analyze sex-specific growth patterns in A. araucana and, for the first time, demonstrate that they result from the contrasting responses of ring width index of male (RWImale) and female (RWIfemale) trees to regional mast events (years with high seed production). During the year of seed maturation and seed dispersal, the growth of females was strongly and significantly reduced, while a growth response of similar magnitude was found in male trees in the previous year, corresponding to the year of pollination. We interpret these growth responses as representing contrasting allocation shifts between growth and reproduction in males and females. The sex-specific growth responses associated with mast events resulted in a particularly strong and distinct signal in a RWImale–RWIfemale chronology. Male and female tree-ring chronologies shared a strong common signal, and responded similarly (but not exactly) to broad-scale climatic conditions in the growing season. Our results indicate that sex-specific tree-ring chronologies can be used to isolate mast events in A. araucana chronologies, providing an opportunity to develop unique multi-century reconstructions of large mast events, and improve dendroclimatic calibration for this species.Martín A. HadadFidel A. RoigJulieta G. Arco MolinaAndrew Hacket-PainElsevierarticleCarbon allocationDendroecologyTrade-offDendroclimatologyPatagoniaEcologyQH540-549.5ENEcological Indicators, Vol 122, Iss , Pp 107245- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Carbon allocation Dendroecology Trade-off Dendroclimatology Patagonia Ecology QH540-549.5
spellingShingle	Carbon allocation Dendroecology Trade-off Dendroclimatology Patagonia Ecology QH540-549.5 Martín A. Hadad Fidel A. Roig Julieta G. Arco Molina Andrew Hacket-Pain Growth of male and female Araucaria araucana trees respond differently to regional mast events, creating sex-specific patterns in their tree-ring chronologies
description	Araucaria araucana is a dioecious evergreen conifer endemic from temperate forests of south Argentina and Chile. It is a long-lived species (maximum age > 1000 years), and it presents a high potential for tree-ring based climate reconstructions. However, the species’ dioecious habit can result in distinct sex-specific growth patterns, which introduce novel challenges in the interpretation of tree-ring chronology variations. We used a network of 10 tree-ring chronologies from northwest Patagonia (Argentina) to analyze sex-specific growth patterns in A. araucana and, for the first time, demonstrate that they result from the contrasting responses of ring width index of male (RWImale) and female (RWIfemale) trees to regional mast events (years with high seed production). During the year of seed maturation and seed dispersal, the growth of females was strongly and significantly reduced, while a growth response of similar magnitude was found in male trees in the previous year, corresponding to the year of pollination. We interpret these growth responses as representing contrasting allocation shifts between growth and reproduction in males and females. The sex-specific growth responses associated with mast events resulted in a particularly strong and distinct signal in a RWImale–RWIfemale chronology. Male and female tree-ring chronologies shared a strong common signal, and responded similarly (but not exactly) to broad-scale climatic conditions in the growing season. Our results indicate that sex-specific tree-ring chronologies can be used to isolate mast events in A. araucana chronologies, providing an opportunity to develop unique multi-century reconstructions of large mast events, and improve dendroclimatic calibration for this species.
format	article
author	Martín A. Hadad Fidel A. Roig Julieta G. Arco Molina Andrew Hacket-Pain
author_facet	Martín A. Hadad Fidel A. Roig Julieta G. Arco Molina Andrew Hacket-Pain
author_sort	Martín A. Hadad
title	Growth of male and female Araucaria araucana trees respond differently to regional mast events, creating sex-specific patterns in their tree-ring chronologies
title_short	Growth of male and female Araucaria araucana trees respond differently to regional mast events, creating sex-specific patterns in their tree-ring chronologies
title_full	Growth of male and female Araucaria araucana trees respond differently to regional mast events, creating sex-specific patterns in their tree-ring chronologies
title_fullStr	Growth of male and female Araucaria araucana trees respond differently to regional mast events, creating sex-specific patterns in their tree-ring chronologies
title_full_unstemmed	Growth of male and female Araucaria araucana trees respond differently to regional mast events, creating sex-specific patterns in their tree-ring chronologies
title_sort	growth of male and female araucaria araucana trees respond differently to regional mast events, creating sex-specific patterns in their tree-ring chronologies
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/917572c215ae486490f8edae9d897dab
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Growth of male and female Araucaria araucana trees respond differently to regional mast events, creating sex-specific patterns in their tree-ring chronologies

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