Phytoplankton of the Chaco-pampean plain
This article summarizes the characteristics of phytoplankton of the Chaco-Pampean Plain between the Pilcomayo River (25º15’S; 57º45’W) and the Lower Salado River (31º39’S; 60º45’W) towards the Paraguay-Paraná system. This subtropical area has a climate gradient from east (wet) to west (arid)....
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E Schweizerbartsche Verlags
2021
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| Acceso en línea: | http://repositorio.unne.edu.ar/handle/123456789/30285 |
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I48-R184-123456789-302852025-03-06T10:58:13Z Phytoplankton of the Chaco-pampean plain Zalocar de Domitrovic, Yolanda Devercelli, Melina Forastier, Marina Elizabet Chaco (Argentina) Phytoplankton Hydrological fl uctuations This article summarizes the characteristics of phytoplankton of the Chaco-Pampean Plain between the Pilcomayo River (25º15’S; 57º45’W) and the Lower Salado River (31º39’S; 60º45’W) towards the Paraguay-Paraná system. This subtropical area has a climate gradient from east (wet) to west (arid). Rivers and streams have a seasonal regime, with fl oods in autumn and dry periods at the end of winter. These hydrological fl uctuations appear to be the driving forces of the phytoplankton community. During low waters (fl ow reduction and increase in salinity), diversity is reduced and density of euryhaline species is increased. The highest algal development in this area was observed during the extraordinary low water period of La Niña. In occasions of environmental stability and high temperatures, water blooms of Anabaenopsis arnoldii, A. nadsonii and Nodularia harveyana have been recorded. The lenitic environments of the western region (arid) show marked fl uctuations in extension and depth and may dry during periods of scarce precipitations. Phytoplankton density is low and represented by small Chlorococcales and Euglenophyceae. Water blooms of Dolichospermum spp. and Cylindro spermopsis raciborskii are frequent. Shallow lakes and wetlands of the eastern region (wet), which have presence of macrophytes and high organic matter, are dominated by Cryptophyceae, Chlorococcales and a wide variety of species of Euglenophyceae and diatoms. The Ramsar Site called ‘Humedales Chaco’ has the greatest diversity of species in this region. 2021-12-04T15:39:17Z 2021-12-04T15:39:17Z 2014 Artículo Zalocar de Domitrovic, Yolanda, Devercelli, Melina y Forastier, Marina Elizabet, 2014. Phytoplankton of the Chaco-pampean plain. Fundamental And Applied Limnology. Stuttgart: E. Schweizerbartsche Verlags, vol. 65, p .81-98. ISSN 1612-166X. http://repositorio.unne.edu.ar/handle/123456789/30285 eng openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf application/pdf E Schweizerbartsche Verlags Fundamental And Applied Limnology, 2014, vol. 65, p .81-98. |
| 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 |
Chaco (Argentina) Phytoplankton Hydrological fl uctuations |
| spellingShingle |
Chaco (Argentina) Phytoplankton Hydrological fl uctuations Zalocar de Domitrovic, Yolanda Devercelli, Melina Forastier, Marina Elizabet Phytoplankton of the Chaco-pampean plain |
| topic_facet |
Chaco (Argentina) Phytoplankton Hydrological fl uctuations |
| description |
This article summarizes the characteristics of phytoplankton of the Chaco-Pampean Plain
between the Pilcomayo River (25º15’S; 57º45’W) and the Lower Salado River (31º39’S; 60º45’W)
towards the Paraguay-Paraná system. This subtropical area has a climate gradient from east (wet) to
west (arid). Rivers and streams have a seasonal regime, with fl oods in autumn and dry periods at the
end of winter. These hydrological fl uctuations appear to be the driving forces of the phytoplankton
community. During low waters (fl ow reduction and increase in salinity), diversity is reduced and
density of euryhaline species is increased. The highest algal development in this area was observed
during the extraordinary low water period of La Niña. In occasions of environmental stability and high
temperatures, water blooms of Anabaenopsis arnoldii, A. nadsonii and Nodularia harveyana have been
recorded.
The lenitic environments of the western region (arid) show marked fl uctuations in extension and depth
and may dry during periods of scarce precipitations. Phytoplankton density is low and represented by
small Chlorococcales and Euglenophyceae. Water blooms of Dolichospermum spp. and Cylindro spermopsis raciborskii are frequent. Shallow lakes and wetlands of the eastern region (wet), which have
presence of macrophytes and high organic matter, are dominated by Cryptophyceae, Chlorococcales
and a wide variety of species of Euglenophyceae and diatoms. The Ramsar Site called ‘Humedales
Chaco’ has the greatest diversity of species in this region. |
| format |
Artículo |
| author |
Zalocar de Domitrovic, Yolanda Devercelli, Melina Forastier, Marina Elizabet |
| author_facet |
Zalocar de Domitrovic, Yolanda Devercelli, Melina Forastier, Marina Elizabet |
| author_sort |
Zalocar de Domitrovic, Yolanda |
| title |
Phytoplankton of the Chaco-pampean plain |
| title_short |
Phytoplankton of the Chaco-pampean plain |
| title_full |
Phytoplankton of the Chaco-pampean plain |
| title_fullStr |
Phytoplankton of the Chaco-pampean plain |
| title_full_unstemmed |
Phytoplankton of the Chaco-pampean plain |
| title_sort |
phytoplankton of the chaco-pampean plain |
| publisher |
E Schweizerbartsche Verlags |
| publishDate |
2021 |
| url |
http://repositorio.unne.edu.ar/handle/123456789/30285 |
| work_keys_str_mv |
AT zalocardedomitrovicyolanda phytoplanktonofthechacopampeanplain AT devercellimelina phytoplanktonofthechacopampeanplain AT forastiermarinaelizabet phytoplanktonofthechacopampeanplain |
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1832343887240232960 |