Atlantic forest replacement by non native tree plantations : comparing aboveground necromass between native forest and pine plantation ecosystems

Necromass is a critical structural and functional component of forest ecosystems that represents an important and relatively long-lived aboveground forest carbon pool. In the Atlantic Forest of Northern Argentina, a large area of native forest has been replaced by commercial, non-native tree plantat...

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Autores principales:	Zaninovich, Silvia Clarisa, Fontana, José Luis, Gatti, María Genoveva
Formato:	Artículo
Lenguaje:	Inglés
Publicado:	Elsevier 2021
Materias:	Coarse Woody Debris Litter Layer Pinus Taeda Water Content
Acceso en línea:	http://repositorio.unne.edu.ar/handle/123456789/27881
Aporte de:	RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste

id	I48-R184-123456789-27881
record_format	dspace
spelling	I48-R184-123456789-278812025-03-06T11:02:38Z Atlantic forest replacement by non native tree plantations : comparing aboveground necromass between native forest and pine plantation ecosystems Zaninovich, Silvia Clarisa Fontana, José Luis Gatti, María Genoveva Coarse Woody Debris Litter Layer Pinus Taeda Water Content Necromass is a critical structural and functional component of forest ecosystems that represents an important and relatively long-lived aboveground forest carbon pool. In the Atlantic Forest of Northern Argentina, a large area of native forest has been replaced by commercial, non-native tree plantations. We hypothesized that total aboveground necromass would be affected by forest conversion. Specifically, we expected a general decrease in necromass with conversion to non-native pine plantations. In five different Pinus taeda plantations (PP) and five native forests (NF) sites in Misiones, Argentina, we quantified the fallen coarse woody debris (CWD: >2 cm diameter) and litter layer (LL: <2 cm diameter) biomass. We compared NF and PP ecosystems with respect to biomass, CWD size classes, decomposition levels, mass moisture content and water volume retained. Coarse woody debris was greatly reduced in PP (1.7 ± 0.5 Mg ha 1) compared to NF (7.5 ± 3.5 Mg ha 1). However, LL biomass in pine plantations increased by 180%, such that similar amounts of total fallen necromass (CWD + LL) were observed in NF (13.5 ± 1.1 Mg ha 1) and PP (14.1 ± 3 Mg ha 1). The CWD size class with the highest biomass was CWD > 10 cm in NF (5.4 ± 3.7 Mg ha 1), and 2–5 cm in PP (1 ± 0.2 Mg ha 1). Coarse woody debris in NF was principally composed of detritus in intermediate to advanced states of decomposition (5.1 ± 3 Mg ha 1; 68% of total CWD), while in PP recently dead material accounted for the majority of CWD (0.8 ± 0.5 Mg ha 1; 49% of total CWD). Necromass moisture content was similar in both forest ecosystems, and increased as the level of decomposition increased. However, because CWD was more abundant in NF, the water volume retained in NF was four times higher than in PP (6.38 ± 1.3 vs. 1.68 ± 0.5 m3 ha 1, respectively). The observed differences in necromass can be explained by the stand characteristics of PP, which are monospecific young systems of short harvest cycles and low quality litter where all aboveground biomass is removed during harvesting. Our findings suggest that NF replacement by PP could have large effects on ecosystem function due to changes in the amount and composition of necromass. Specifically, the predominance of fine detritus in PP likely lowers the residence time of carbón and water storage in detritus, as well as ecosystem biodiversity, while also increasing the risk of natural fires. Management strategies that would increase coarse necromass, such as not removing harvest residues and extending tree harvest age, should be considered. 2021-05-05T15:40:33Z 2021-05-05T15:40:33Z 2016 Artículo Zaninovich, Silvia Clarisa, Fontana, José Luis y Gatti, María Genoveva, 2016. Atlantic forest replacement by non native tree plantations : comparing aboveground necromass between native forest and pine plantation ecosystems. Forest Ecology and Management. Amsterdam: Elsevier, vol. 363, p. 39-46. ISSN 0378-1127. 0378-1127 http://repositorio.unne.edu.ar/handle/123456789/27881 eng https://doi.org/10.1016/j.foreco.2015.12.022 openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf application/pdf Elsevier Forest Ecology and Management, 2016, vol. 363, p. 39-46.
institution	Universidad Nacional del Nordeste
institution_str	I-48
repository_str	R-184
collection	RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
language	Inglés
topic	Coarse Woody Debris Litter Layer Pinus Taeda Water Content
spellingShingle	Coarse Woody Debris Litter Layer Pinus Taeda Water Content Zaninovich, Silvia Clarisa Fontana, José Luis Gatti, María Genoveva Atlantic forest replacement by non native tree plantations : comparing aboveground necromass between native forest and pine plantation ecosystems
topic_facet	Coarse Woody Debris Litter Layer Pinus Taeda Water Content
description	Necromass is a critical structural and functional component of forest ecosystems that represents an important and relatively long-lived aboveground forest carbon pool. In the Atlantic Forest of Northern Argentina, a large area of native forest has been replaced by commercial, non-native tree plantations. We hypothesized that total aboveground necromass would be affected by forest conversion. Specifically, we expected a general decrease in necromass with conversion to non-native pine plantations. In five different Pinus taeda plantations (PP) and five native forests (NF) sites in Misiones, Argentina, we quantified the fallen coarse woody debris (CWD: >2 cm diameter) and litter layer (LL: <2 cm diameter) biomass. We compared NF and PP ecosystems with respect to biomass, CWD size classes, decomposition levels, mass moisture content and water volume retained. Coarse woody debris was greatly reduced in PP (1.7 ± 0.5 Mg ha 1) compared to NF (7.5 ± 3.5 Mg ha 1). However, LL biomass in pine plantations increased by 180%, such that similar amounts of total fallen necromass (CWD + LL) were observed in NF (13.5 ± 1.1 Mg ha 1) and PP (14.1 ± 3 Mg ha 1). The CWD size class with the highest biomass was CWD > 10 cm in NF (5.4 ± 3.7 Mg ha 1), and 2–5 cm in PP (1 ± 0.2 Mg ha 1). Coarse woody debris in NF was principally composed of detritus in intermediate to advanced states of decomposition (5.1 ± 3 Mg ha 1; 68% of total CWD), while in PP recently dead material accounted for the majority of CWD (0.8 ± 0.5 Mg ha 1; 49% of total CWD). Necromass moisture content was similar in both forest ecosystems, and increased as the level of decomposition increased. However, because CWD was more abundant in NF, the water volume retained in NF was four times higher than in PP (6.38 ± 1.3 vs. 1.68 ± 0.5 m3 ha 1, respectively). The observed differences in necromass can be explained by the stand characteristics of PP, which are monospecific young systems of short harvest cycles and low quality litter where all aboveground biomass is removed during harvesting. Our findings suggest that NF replacement by PP could have large effects on ecosystem function due to changes in the amount and composition of necromass. Specifically, the predominance of fine detritus in PP likely lowers the residence time of carbón and water storage in detritus, as well as ecosystem biodiversity, while also increasing the risk of natural fires. Management strategies that would increase coarse necromass, such as not removing harvest residues and extending tree harvest age, should be considered.
format	Artículo
author	Zaninovich, Silvia Clarisa Fontana, José Luis Gatti, María Genoveva
author_facet	Zaninovich, Silvia Clarisa Fontana, José Luis Gatti, María Genoveva
author_sort	Zaninovich, Silvia Clarisa
title	Atlantic forest replacement by non native tree plantations : comparing aboveground necromass between native forest and pine plantation ecosystems
title_short	Atlantic forest replacement by non native tree plantations : comparing aboveground necromass between native forest and pine plantation ecosystems
title_full	Atlantic forest replacement by non native tree plantations : comparing aboveground necromass between native forest and pine plantation ecosystems
title_fullStr	Atlantic forest replacement by non native tree plantations : comparing aboveground necromass between native forest and pine plantation ecosystems
title_full_unstemmed	Atlantic forest replacement by non native tree plantations : comparing aboveground necromass between native forest and pine plantation ecosystems
title_sort	atlantic forest replacement by non native tree plantations : comparing aboveground necromass between native forest and pine plantation ecosystems
publisher	Elsevier
publishDate	2021
url	http://repositorio.unne.edu.ar/handle/123456789/27881
work_keys_str_mv	AT zaninovichsilviaclarisa atlanticforestreplacementbynonnativetreeplantationscomparingabovegroundnecromassbetweennativeforestandpineplantationecosystems AT fontanajoseluis atlanticforestreplacementbynonnativetreeplantationscomparingabovegroundnecromassbetweennativeforestandpineplantationecosystems AT gattimariagenoveva atlanticforestreplacementbynonnativetreeplantationscomparingabovegroundnecromassbetweennativeforestandpineplantationecosystems
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Atlantic forest replacement by non native tree plantations : comparing aboveground necromass between native forest and pine plantation ecosystems

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