Artigo

Germinative behaviour of ten tree species in white-water floodplain forests in central Amazonia

Amazonian floodplain forests (known as várzea) are classified into high or low várzea depending on the spatial position on the plains. This topographic feature exposes the terrain over different time periods of inundation, causing a major limiting factor for tree seedling establishment. We hypothesi...

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Autor principal: Conserva, Auristela
Outros Autores: Camargo, José Luís Campana, Santana, Denise Garcia de, Piedade, Maria Teresa Fernandez
Grau: Artigo
Idioma: English
Publicado em: Folia Geobotanica 2020
Assuntos:
Ecosystem Service
Flood
Floodplain
Germination
Morphology
Seedling Establishment
Tree
Amazonia
Acesso em linha: https://repositorio.inpa.gov.br/handle/1/16950
id oai:repositorio:1-16950
recordtype dspace
spelling oai:repositorio:1-16950 Germinative behaviour of ten tree species in white-water floodplain forests in central Amazonia Conserva, Auristela Camargo, José Luís Campana Santana, Denise Garcia de Piedade, Maria Teresa Fernandez Ecosystem Service Flood Floodplain Germination Morphology Seedling Establishment Tree Amazonia Amazonian floodplain forests (known as várzea) are classified into high or low várzea depending on the spatial position on the plains. This topographic feature exposes the terrain over different time periods of inundation, causing a major limiting factor for tree seedling establishment. We hypothesize that, strategically, most of the seeds produced by trees in low várzea forests germinate faster and in synchrony (temporally concentrated germination), and that their seedlings tend to have cotyledons without reserve or foliaceous cotyledons (PEF). By contrast, seeds produced by high-várzea specialist trees exhibit slower and temporally scattered germination, and their seedlings tend to have reserve storage cotyledons (CHR). Generalist species may show no clear pattern or may be related to high-várzea species. To test this hypothesis, diaspores of 10 tree species were collected: five of low-várzea specialist trees, three of high-várzea specialist trees and two of generalist species. Seedling emergence and morphology were monitored daily in a nursery for a period of 150 days of being subjected to non-flooded (sown directly in várzea soil) and flooded conditions (15 days in water before sowing in the same soil). The seedling emergence of low-várzea species showed an increase of 37% in germinability whereas high-várzea and generalist species exhibited a decrease of 38% and 35% of germinability, respectively. Foliaceous cotyledons were preferentially found in seedlings of low-várzea species, and storage cotyledons were more common in those of high-várzea species, indicating how cotyledon morphology may determine the amount and use of resources available to a seedling during the first stages of establishment and growth. Conservation plans aiming for the maintenance of ecosystem services must consider these strategies. © 2017, Institute of Botany, Academy of Sciences of the Czech Republic. 2020-06-15T21:37:33Z 2020-06-15T21:37:33Z 2018 Artigo https://repositorio.inpa.gov.br/handle/1/16950 10.1007/s12224-017-9284-1 en Volume 53, Número 1, Pags. 89-101 Restrito Folia Geobotanica
institution Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection INPA-RI
language English
topic Ecosystem Service
Flood
Floodplain
Germination
Morphology
Seedling Establishment
Tree
Amazonia
spellingShingle Ecosystem Service
Flood
Floodplain
Germination
Morphology
Seedling Establishment
Tree
Amazonia
Conserva, Auristela
Germinative behaviour of ten tree species in white-water floodplain forests in central Amazonia
topic_facet Ecosystem Service
Flood
Floodplain
Germination
Morphology
Seedling Establishment
Tree
Amazonia
description Amazonian floodplain forests (known as várzea) are classified into high or low várzea depending on the spatial position on the plains. This topographic feature exposes the terrain over different time periods of inundation, causing a major limiting factor for tree seedling establishment. We hypothesize that, strategically, most of the seeds produced by trees in low várzea forests germinate faster and in synchrony (temporally concentrated germination), and that their seedlings tend to have cotyledons without reserve or foliaceous cotyledons (PEF). By contrast, seeds produced by high-várzea specialist trees exhibit slower and temporally scattered germination, and their seedlings tend to have reserve storage cotyledons (CHR). Generalist species may show no clear pattern or may be related to high-várzea species. To test this hypothesis, diaspores of 10 tree species were collected: five of low-várzea specialist trees, three of high-várzea specialist trees and two of generalist species. Seedling emergence and morphology were monitored daily in a nursery for a period of 150 days of being subjected to non-flooded (sown directly in várzea soil) and flooded conditions (15 days in water before sowing in the same soil). The seedling emergence of low-várzea species showed an increase of 37% in germinability whereas high-várzea and generalist species exhibited a decrease of 38% and 35% of germinability, respectively. Foliaceous cotyledons were preferentially found in seedlings of low-várzea species, and storage cotyledons were more common in those of high-várzea species, indicating how cotyledon morphology may determine the amount and use of resources available to a seedling during the first stages of establishment and growth. Conservation plans aiming for the maintenance of ecosystem services must consider these strategies. © 2017, Institute of Botany, Academy of Sciences of the Czech Republic.
format Artigo
author Conserva, Auristela
author2 Camargo, José Luís Campana
Santana, Denise Garcia de
Piedade, Maria Teresa Fernandez
author2Str Camargo, José Luís Campana
Santana, Denise Garcia de
Piedade, Maria Teresa Fernandez
title Germinative behaviour of ten tree species in white-water floodplain forests in central Amazonia
title_short Germinative behaviour of ten tree species in white-water floodplain forests in central Amazonia
title_full Germinative behaviour of ten tree species in white-water floodplain forests in central Amazonia
title_fullStr Germinative behaviour of ten tree species in white-water floodplain forests in central Amazonia
title_full_unstemmed Germinative behaviour of ten tree species in white-water floodplain forests in central Amazonia
title_sort germinative behaviour of ten tree species in white-water floodplain forests in central amazonia
publisher Folia Geobotanica
publishDate 2020
url https://repositorio.inpa.gov.br/handle/1/16950
_version_ 1787143349328674816
score 11.755432

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