Functional structure of the landscape and seed dispersal of Araucaria angustifolia in Canoas River Basin (Southern Brazil)

SUMMARY: Araucaria angustifolia is one of the main species of the Mixed Ombrophilous Forest and has been threatened by extinction. Additionally, a low number of regenerating individuals can be seen in forest remnants. For these reasons, this study aimed at evaluating the functional structure of Cano...

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Autores principales:	Köche Marcon,Amanda, Vidolin,Gisley Paula, Biondi,Daniela
Lenguaje:	English
Publicado:	Universidad Austral de Chile, Facultad de Ciencias Forestales 2021
Materias:	landscape ecology connectivity forest fragmentation Brazilian pine landscape metrics
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002021000100089
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spelling	oai:scielo:S0717-920020210001000892021-07-25Functional structure of the landscape and seed dispersal of Araucaria angustifolia in Canoas River Basin (Southern Brazil)Köche Marcon,AmandaVidolin,Gisley PaulaBiondi,Daniela landscape ecology connectivity forest fragmentation Brazilian pine landscape metrics SUMMARY: Araucaria angustifolia is one of the main species of the Mixed Ombrophilous Forest and has been threatened by extinction. Additionally, a low number of regenerating individuals can be seen in forest remnants. For these reasons, this study aimed at evaluating the functional structure of Canoas River Basin (state of Santa Catarina, Brazil) using landscape ecology metrics, and at verifying whether or not the proximity between remnants is compatible with this species displacement of the main dispersers. Thus, a landscape structure analysis was performed using metrics of area, shape, edge and connectivity of habitat fragments based on satellite images. Landscape metrics were related to maximum distances of displacement of dispersers and to effective dispersion distance based on a genetic estimate derived from secondary data. Results indicate that Canoas River Basin has natural vegetation cover in 19.6 % of its territory and is highly fragmented. A total of 80.8 % of the fragments have an area smaller than 50 ha. The proximity between patches concerning the mean displacement of dispersers (87 m) is zero for 100 % of fragments. The proximity is zero in 43.5 % landscape, considering the effective seed dispersion based on the genetic estimate of dispersion distance. Therefore, the connectivity between fragments is very low, which may justify the fact that this species is often not found in the regenerating components of forest inventories.info:eu-repo/semantics/openAccessUniversidad Austral de Chile, Facultad de Ciencias ForestalesBosque (Valdivia) v.42 n.1 20212021-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002021000100089en10.4067/S0717-92002021000100089
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	landscape ecology connectivity forest fragmentation Brazilian pine landscape metrics
spellingShingle	landscape ecology connectivity forest fragmentation Brazilian pine landscape metrics Köche Marcon,Amanda Vidolin,Gisley Paula Biondi,Daniela Functional structure of the landscape and seed dispersal of Araucaria angustifolia in Canoas River Basin (Southern Brazil)
description	SUMMARY: Araucaria angustifolia is one of the main species of the Mixed Ombrophilous Forest and has been threatened by extinction. Additionally, a low number of regenerating individuals can be seen in forest remnants. For these reasons, this study aimed at evaluating the functional structure of Canoas River Basin (state of Santa Catarina, Brazil) using landscape ecology metrics, and at verifying whether or not the proximity between remnants is compatible with this species displacement of the main dispersers. Thus, a landscape structure analysis was performed using metrics of area, shape, edge and connectivity of habitat fragments based on satellite images. Landscape metrics were related to maximum distances of displacement of dispersers and to effective dispersion distance based on a genetic estimate derived from secondary data. Results indicate that Canoas River Basin has natural vegetation cover in 19.6 % of its territory and is highly fragmented. A total of 80.8 % of the fragments have an area smaller than 50 ha. The proximity between patches concerning the mean displacement of dispersers (87 m) is zero for 100 % of fragments. The proximity is zero in 43.5 % landscape, considering the effective seed dispersion based on the genetic estimate of dispersion distance. Therefore, the connectivity between fragments is very low, which may justify the fact that this species is often not found in the regenerating components of forest inventories.
author	Köche Marcon,Amanda Vidolin,Gisley Paula Biondi,Daniela
author_facet	Köche Marcon,Amanda Vidolin,Gisley Paula Biondi,Daniela
author_sort	Köche Marcon,Amanda
title	Functional structure of the landscape and seed dispersal of Araucaria angustifolia in Canoas River Basin (Southern Brazil)
title_short	Functional structure of the landscape and seed dispersal of Araucaria angustifolia in Canoas River Basin (Southern Brazil)
title_full	Functional structure of the landscape and seed dispersal of Araucaria angustifolia in Canoas River Basin (Southern Brazil)
title_fullStr	Functional structure of the landscape and seed dispersal of Araucaria angustifolia in Canoas River Basin (Southern Brazil)
title_full_unstemmed	Functional structure of the landscape and seed dispersal of Araucaria angustifolia in Canoas River Basin (Southern Brazil)
title_sort	functional structure of the landscape and seed dispersal of araucaria angustifolia in canoas river basin (southern brazil)
publisher	Universidad Austral de Chile, Facultad de Ciencias Forestales
publishDate	2021
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002021000100089
work_keys_str_mv	AT kochemarconamanda functionalstructureofthelandscapeandseeddispersalofaraucariaangustifoliaincanoasriverbasinsouthernbrazil AT vidolingisleypaula functionalstructureofthelandscapeandseeddispersalofaraucariaangustifoliaincanoasriverbasinsouthernbrazil AT biondidaniela functionalstructureofthelandscapeandseeddispersalofaraucariaangustifoliaincanoasriverbasinsouthernbrazil
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Functional structure of the landscape and seed dispersal of Araucaria angustifolia in Canoas River Basin (Southern Brazil)

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