EARLY DEVELOPMENT OF NOTHOFAGUS (NOTHOFAGACEAE) SPECIES FROM THE SUBANTARCTIC FOREST UNDER EXPERIMENTAL CONDITIONS OF LIGHT, SUBSTRATE AND ECOLOGICAL INTERACTION

The entry of trees into a community is an irregular process often constrained by species interactions and regeneration niche. We experimentally examined the effect of light intensity (high, medium and low), substrate type (mineral and cover with litter) and presence of Chusquea culeou (Poaceae), on...

Descripción completa

Detalles Bibliográficos
Autores: Dezzotti, Alejandro, Ponce, Oscar
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2018
País:Brasil
Institución:Universidade Federal de Lavras (UFLA)
Repositorio:Cerne (Online)
Idioma:inglés
OAI Identifier:oai:cerne.ufla.br:article/1821
Acceso en línea:https://cerne.ufla.br/site/index.php/CERNE/article/view/1821
Access Level:acceso abierto
Palabra clave:Nothofagus dombeyi, Nothofagus obliqua, Nothofagus alpina, Chusquea culeou, randomized factorial experiment.
Nothofagus obliqua
id BR_9e3493c5bb22b4eda2452c2ff2fc6c44
oai_identifier_str oai:cerne.ufla.br:article/1821
network_acronym_str BR
network_name_str Brasil
repository_id_str
spelling EARLY DEVELOPMENT OF NOTHOFAGUS (NOTHOFAGACEAE) SPECIES FROM THE SUBANTARCTIC FOREST UNDER EXPERIMENTAL CONDITIONS OF LIGHT, SUBSTRATE AND ECOLOGICAL INTERACTIONNothofagus dombeyi, Nothofagus obliqua, Nothofagus alpina, Chusquea culeou, randomized factorial experiment.Nothofagus obliquaThe entry of trees into a community is an irregular process often constrained by species interactions and regeneration niche. We experimentally examined the effect of light intensity (high, medium and low), substrate type (mineral and cover with litter) and presence of Chusquea culeou (Poaceae), on the performance of regeneration of Nothofagus dombeyi, N. obliqua and N. alpina (Nothofagaceae). These species constitute the natural forest within the lake Lácar watershed (40° 08´ W, 71° 30´ S). Populations of C. culeou, an abundant understorey component that restrict tree regeneration, experimented in 2001 a gregarious flowering and subsequent mortality comprising 200,000 ha and the development of an abundant seedlings cohort. During tests, Nothofagus species exhibited a very low germination (< 2.2%) positively correlated with seed weight. Plant emergence and size was larger and mortality smaller under high irradiation, probably as an adaptation to colonize open areas. Reduced germination of seeds on organic substrate was ascribed to the role of litter as a physical barrier. Nothofagus exhibited 76% of increased mortality under the presence of C. culeou, whose germination was very abundant (93% in laboratory) and occurred preferably with high irradiance and litter. However, C. culeou also showed a good response with lower light levels. After senescence, C. culeou would form an abundant and fast-growing cohort that probably limits Nothofagus ability to establish, given increased mortality and litter accumulation. These results contribute to a better understanding of succession, which is crucial for implementing a sound management of this valuable ecosystem.CERNECERNE2018-07-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://cerne.ufla.br/site/index.php/CERNE/article/view/1821CERNE; Vol. 24 No. 2 (2018); 149-161CERNE; v. 24 n. 2 (2018); 149-1612317-63420104-7760reponame:Cerne (Online)instname:Universidade Federal de Lavras (UFLA)instacron:UFLAenghttps://cerne.ufla.br/site/index.php/CERNE/article/view/1821/1073Copyright (c) 2018 CERNEinfo:eu-repo/semantics/openAccessDezzotti, AlejandroPonce, Oscar2018-07-17T02:10:36Zoai:cerne.ufla.br:article/1821Revistahttps://cerne.ufla.br/site/index.php/CERNEPUBhttps://cerne.ufla.br/site/index.php/CERNE/oaicerne@dcf.ufla.br||cerne@dcf.ufla.br2317-63420104-7760opendoar:2024-05-23T16:29:03.183311Cerne (Online) - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv EARLY DEVELOPMENT OF NOTHOFAGUS (NOTHOFAGACEAE) SPECIES FROM THE SUBANTARCTIC FOREST UNDER EXPERIMENTAL CONDITIONS OF LIGHT, SUBSTRATE AND ECOLOGICAL INTERACTION
title EARLY DEVELOPMENT OF NOTHOFAGUS (NOTHOFAGACEAE) SPECIES FROM THE SUBANTARCTIC FOREST UNDER EXPERIMENTAL CONDITIONS OF LIGHT, SUBSTRATE AND ECOLOGICAL INTERACTION
spellingShingle EARLY DEVELOPMENT OF NOTHOFAGUS (NOTHOFAGACEAE) SPECIES FROM THE SUBANTARCTIC FOREST UNDER EXPERIMENTAL CONDITIONS OF LIGHT, SUBSTRATE AND ECOLOGICAL INTERACTION
Dezzotti, Alejandro
Nothofagus dombeyi, Nothofagus obliqua, Nothofagus alpina, Chusquea culeou, randomized factorial experiment.
Nothofagus obliqua
title_short EARLY DEVELOPMENT OF NOTHOFAGUS (NOTHOFAGACEAE) SPECIES FROM THE SUBANTARCTIC FOREST UNDER EXPERIMENTAL CONDITIONS OF LIGHT, SUBSTRATE AND ECOLOGICAL INTERACTION
title_full EARLY DEVELOPMENT OF NOTHOFAGUS (NOTHOFAGACEAE) SPECIES FROM THE SUBANTARCTIC FOREST UNDER EXPERIMENTAL CONDITIONS OF LIGHT, SUBSTRATE AND ECOLOGICAL INTERACTION
title_fullStr EARLY DEVELOPMENT OF NOTHOFAGUS (NOTHOFAGACEAE) SPECIES FROM THE SUBANTARCTIC FOREST UNDER EXPERIMENTAL CONDITIONS OF LIGHT, SUBSTRATE AND ECOLOGICAL INTERACTION
title_full_unstemmed EARLY DEVELOPMENT OF NOTHOFAGUS (NOTHOFAGACEAE) SPECIES FROM THE SUBANTARCTIC FOREST UNDER EXPERIMENTAL CONDITIONS OF LIGHT, SUBSTRATE AND ECOLOGICAL INTERACTION
title_sort EARLY DEVELOPMENT OF NOTHOFAGUS (NOTHOFAGACEAE) SPECIES FROM THE SUBANTARCTIC FOREST UNDER EXPERIMENTAL CONDITIONS OF LIGHT, SUBSTRATE AND ECOLOGICAL INTERACTION
dc.creator.none.fl_str_mv Dezzotti, Alejandro
Ponce, Oscar
author Dezzotti, Alejandro
author_facet Dezzotti, Alejandro
Ponce, Oscar
author_role author
author2 Ponce, Oscar
author2_role author
dc.subject.por.fl_str_mv Nothofagus dombeyi, Nothofagus obliqua, Nothofagus alpina, Chusquea culeou, randomized factorial experiment.
Nothofagus obliqua
topic Nothofagus dombeyi, Nothofagus obliqua, Nothofagus alpina, Chusquea culeou, randomized factorial experiment.
Nothofagus obliqua
description The entry of trees into a community is an irregular process often constrained by species interactions and regeneration niche. We experimentally examined the effect of light intensity (high, medium and low), substrate type (mineral and cover with litter) and presence of Chusquea culeou (Poaceae), on the performance of regeneration of Nothofagus dombeyi, N. obliqua and N. alpina (Nothofagaceae). These species constitute the natural forest within the lake Lácar watershed (40° 08´ W, 71° 30´ S). Populations of C. culeou, an abundant understorey component that restrict tree regeneration, experimented in 2001 a gregarious flowering and subsequent mortality comprising 200,000 ha and the development of an abundant seedlings cohort. During tests, Nothofagus species exhibited a very low germination (< 2.2%) positively correlated with seed weight. Plant emergence and size was larger and mortality smaller under high irradiation, probably as an adaptation to colonize open areas. Reduced germination of seeds on organic substrate was ascribed to the role of litter as a physical barrier. Nothofagus exhibited 76% of increased mortality under the presence of C. culeou, whose germination was very abundant (93% in laboratory) and occurred preferably with high irradiance and litter. However, C. culeou also showed a good response with lower light levels. After senescence, C. culeou would form an abundant and fast-growing cohort that probably limits Nothofagus ability to establish, given increased mortality and litter accumulation. These results contribute to a better understanding of succession, which is crucial for implementing a sound management of this valuable ecosystem.
publishDate 2018
dc.date.none.fl_str_mv 2018-07-17
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://cerne.ufla.br/site/index.php/CERNE/article/view/1821
url https://cerne.ufla.br/site/index.php/CERNE/article/view/1821
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://cerne.ufla.br/site/index.php/CERNE/article/view/1821/1073
dc.rights.driver.fl_str_mv Copyright (c) 2018 CERNE
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2018 CERNE
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv CERNE
CERNE
publisher.none.fl_str_mv CERNE
CERNE
dc.source.none.fl_str_mv CERNE; Vol. 24 No. 2 (2018); 149-161
CERNE; v. 24 n. 2 (2018); 149-161
2317-6342
0104-7760
reponame:Cerne (Online)
instname:Universidade Federal de Lavras (UFLA)
instacron:UFLA
instname_str Universidade Federal de Lavras (UFLA)
instacron_str UFLA
institution UFLA
reponame_str Cerne (Online)
collection Cerne (Online)
repository.name.fl_str_mv Cerne (Online) - Universidade Federal de Lavras (UFLA)
repository.mail.fl_str_mv cerne@dcf.ufla.br||cerne@dcf.ufla.br
_version_ 1853660203474485248
score 15,298079

Similares en LA Referencia