Tiller population dynamics and production on Spartina densiflora (brong) on the floodplain of the Paraná river, Argentina

Tiller dynamics and net aerial primary productivity (NAPP) were studied in permanent sample plots of Spartina densiflora at Otamendi Natural Reserve (Buenos Aires Province, Argentina) from June 1996 to December 1997. Emergence, growth, senescence, survival, biomass dynamics, and tiller productivity...

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Autores principales: Vicari, R.L., Fischer, S., Madanes, N., Bonaventura, S.M., Pancotto, V.
Formato: JOUR
Materias:
Non-destructive method
Primary production
Salt marsh
Spartina densiflora
Tiller population dynamics
biomass
floodplain
nondestructive testing
population dynamics
primary production
senescence
Argentina
Buenos Aires [Argentina]
Otamendi Natural Reserve
Parana River
South America
Western Hemisphere
World
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_02775212_v22_n2_p347_Vicari
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_02775212_v22_n2_p347_Vicari
record_format dspace
spelling todo:paper_02775212_v22_n2_p347_Vicari2023-10-03T15:16:04Z Tiller population dynamics and production on Spartina densiflora (brong) on the floodplain of the Paraná river, Argentina Vicari, R.L. Fischer, S. Madanes, N. Bonaventura, S.M. Pancotto, V. Non-destructive method Primary production Salt marsh Spartina densiflora Tiller population dynamics biomass floodplain nondestructive testing population dynamics primary production senescence Argentina Buenos Aires [Argentina] Otamendi Natural Reserve Parana River South America Western Hemisphere World Spartina densiflora Tiller dynamics and net aerial primary productivity (NAPP) were studied in permanent sample plots of Spartina densiflora at Otamendi Natural Reserve (Buenos Aires Province, Argentina) from June 1996 to December 1997. Emergence, growth, senescence, survival, biomass dynamics, and tiller productivity were analyzed. These population attributes varied seasonally during the first study year, whereas variations were not detected in the subsequent year. Tiller density increased slightly during the first twelve months, attaining 2445 ± 869 tillers·m-2, then remaining constant until the end of the study period. Senescence rate was lower than emergence rate on most sampling occasions. Cohorts originated in different seasons showed distinct survival curves. The life span of tillers was at least 18 months. Green biomass reached maximum values (771 ± 410 g·m-2) during the first year but decreased during the last six months of observations. Annual NAPP was 1450 ± 566 g·m-2·y-1. Average productivity rate was higher in the first year than in the second year. The decrease in the population density of tillers of S. densiflora and the increase in its senescence rate were more likely related to grazing and flooding than to population dynamics. © 2002, The Society of Wetland Scientists. Fil:Fischer, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Madanes, N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pancotto, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_02775212_v22_n2_p347_Vicari
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Non-destructive method
Primary production
Salt marsh
Spartina densiflora
Tiller population dynamics
biomass
floodplain
nondestructive testing
population dynamics
primary production
senescence
Argentina
Buenos Aires [Argentina]
Otamendi Natural Reserve
Parana River
South America
Western Hemisphere
World
Spartina densiflora
spellingShingle Non-destructive method
Primary production
Salt marsh
Spartina densiflora
Tiller population dynamics
biomass
floodplain
nondestructive testing
population dynamics
primary production
senescence
Argentina
Buenos Aires [Argentina]
Otamendi Natural Reserve
Parana River
South America
Western Hemisphere
World
Spartina densiflora
Vicari, R.L.
Fischer, S.
Madanes, N.
Bonaventura, S.M.
Pancotto, V.
Tiller population dynamics and production on Spartina densiflora (brong) on the floodplain of the Paraná river, Argentina
topic_facet Non-destructive method
Primary production
Salt marsh
Spartina densiflora
Tiller population dynamics
biomass
floodplain
nondestructive testing
population dynamics
primary production
senescence
Argentina
Buenos Aires [Argentina]
Otamendi Natural Reserve
Parana River
South America
Western Hemisphere
World
Spartina densiflora
description Tiller dynamics and net aerial primary productivity (NAPP) were studied in permanent sample plots of Spartina densiflora at Otamendi Natural Reserve (Buenos Aires Province, Argentina) from June 1996 to December 1997. Emergence, growth, senescence, survival, biomass dynamics, and tiller productivity were analyzed. These population attributes varied seasonally during the first study year, whereas variations were not detected in the subsequent year. Tiller density increased slightly during the first twelve months, attaining 2445 ± 869 tillers·m-2, then remaining constant until the end of the study period. Senescence rate was lower than emergence rate on most sampling occasions. Cohorts originated in different seasons showed distinct survival curves. The life span of tillers was at least 18 months. Green biomass reached maximum values (771 ± 410 g·m-2) during the first year but decreased during the last six months of observations. Annual NAPP was 1450 ± 566 g·m-2·y-1. Average productivity rate was higher in the first year than in the second year. The decrease in the population density of tillers of S. densiflora and the increase in its senescence rate were more likely related to grazing and flooding than to population dynamics. © 2002, The Society of Wetland Scientists.
format JOUR
author Vicari, R.L.
Fischer, S.
Madanes, N.
Bonaventura, S.M.
Pancotto, V.
author_facet Vicari, R.L.
Fischer, S.
Madanes, N.
Bonaventura, S.M.
Pancotto, V.
author_sort Vicari, R.L.
title Tiller population dynamics and production on Spartina densiflora (brong) on the floodplain of the Paraná river, Argentina
title_short Tiller population dynamics and production on Spartina densiflora (brong) on the floodplain of the Paraná river, Argentina
title_full Tiller population dynamics and production on Spartina densiflora (brong) on the floodplain of the Paraná river, Argentina
title_fullStr Tiller population dynamics and production on Spartina densiflora (brong) on the floodplain of the Paraná river, Argentina
title_full_unstemmed Tiller population dynamics and production on Spartina densiflora (brong) on the floodplain of the Paraná river, Argentina
title_sort tiller population dynamics and production on spartina densiflora (brong) on the floodplain of the paraná river, argentina
url http://hdl.handle.net/20.500.12110/paper_02775212_v22_n2_p347_Vicari
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