Pulse regime and vegetation communities in fluvial systems: The case of the Parana River floodplain, Argentina

Marchetti, Zuleica Yael; Aceñolaza, Pablo Gilberto

doi:10.1016/j.flora.2012.09.004

Cited by 22 publications

(24 citation statements)

References 24 publications

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“…Regarding plant diversity, per-site alpha diversity was relatively low, but gamma diversity was relatively high due to the high beta diversity ("diversity of habitats" hypothesis, sensu Shmida and Wilson, 1985). The Shannon-Wiener diversity recorded in this area was always lower than that of the Middle Paraná River floodplain (Marchetti and Aceñolaza, 2012), even when compared to the diversity of islands in an early successional stage after an extraordinary flood (Franceschi and Lewis, 1991;Franceschi et al, 2010). Also, the gamma diversity was lower than upstream (Marchetti and Aceñolaza, 2012) but higher than downstream in the Lower Paraná River Delta (Kandus et al, 2003).…”

Section: Discussionmentioning

confidence: 79%

“…The Shannon-Wiener diversity recorded in this area was always lower than that of the Middle Paraná River floodplain (Marchetti and Aceñolaza, 2012), even when compared to the diversity of islands in an early successional stage after an extraordinary flood (Franceschi and Lewis, 1991;Franceschi et al, 2010). Also, the gamma diversity was lower than upstream (Marchetti and Aceñolaza, 2012) but higher than downstream in the Lower Paraná River Delta (Kandus et al, 2003). This pattern can be attributed to a loss of biodiversity due to the transition from tropical and subtropical latitudes (Oakley et al, 2005).…”

Section: Discussionmentioning

confidence: 80%

“…This life form goes hand in hand with maintaining reproductive structures between seasons and flood events, and seems well suited for the irregular flood pulse of the Paraná River (Carignan and Neiff, 1992). The most abundant and constant plant families are also abundant upstream in the Middle Paraná River floodplain (Asteraceae, Poaceae, Fabaceae and Solanaceae) (Marchetti and Aceñolaza, 2012) or downstream in the Lower Paraná River Delta (Asteraceae, Cyperaceae, Fabaceae, Polygonaceae and Apiaceae) (Kandus et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

“…Their spatial pattern corresponded to mosaics of environmental conditions, accounting for variations in floodability and soil features. The bulrush marshes of Schoenoplectus californicus are absent in the Middle Paraná River floodplains (Marchetti and Aceñolaza, 2012) but are typical of the Paraná River Table 4 for details). (b) Biplot of sites (symbols, n = 82) and species.…”

Section: Discussionmentioning

confidence: 99%

“…Conversely, the bunchgrasses and grasslands of Coleataenia prionitis with Cynodon dactylon are absent in the Paraná River Delta and are typical of the Middle Paraná River Aceñolaza, 2012, 2011). Salt marshes of Paspalum vaginatum or Bolboschoenus robustus had not been described yet for the Middle or Lower sector of the Paraná River floodplain (Kandus et al, 2003;Marchetti and Aceñolaza, 2012). Regarding plant diversity, per-site alpha diversity was relatively low, but gamma diversity was relatively high due to the high beta diversity ("diversity of habitats" hypothesis, sensu Shmida and Wilson, 1985).…”

Section: Discussionmentioning

confidence: 99%

See 4 more Smart Citations

Multi-scale analysis of environmental constraints on macrophyte distribution, floristic groups and plant diversity in the Lower Paraná River floodplain

Morandeira

Kandus

2015

Aquatic Botany

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Section: Discussionmentioning

confidence: 79%

Section: Discussionmentioning

confidence: 80%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 3 more Smart Citations

Multi-scale analysis of environmental constraints on macrophyte distribution, floristic groups and plant diversity in the Lower Paraná River floodplain

Morandeira

Kandus

2015

Aquatic Botany

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Linking hydrologic regime, rainfall and leaf litter fall in a riverine forest within the Ramsar Site Humedales Chaco (Argentina)

et al. 2015

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The input of leaf litter from riparian vegetation could be affected by changes in precipitation and modifications to the hydrological regime. We analyse the pattern of leaf litterfall at the community scale as well as the breakdown rate in a mixed gallery forest that covers the levees of the Paraná River oxbow lake. Litterfall was collected biweekly for 4 years that represents different rainfall and hydrologic regimes of the Paraná River including flood and prolonged drought: 1996–1997 (PA), 1999–2000 (PB), 2005–2006 (PC) and 2007–2008 (PD). To analyse leaf breakdown, litter bags were incubated on the forest floor during flooding conditions (FFo) and dry conditions (DFo) and in the oxbow lake (FOx). The total annual leaf litterfall were 8.97, 11.15, 10.42 and 14.43 tn ha−1 yr−1 for PA, PB, PC and PD, respectively. Our results suggest that with the increasing severity of the dry season and decreasing hydrologic connectivity, the annual leaf litterfall increases, whereas its seasonal pattern does not change. Regardless of the seasonal pattern of rainfall and hydrological regime in each study period, leaf fall occurred throughout the year, and the peak was recorded between August and October. Leaves decomposed fastest in FOx, and the leaf breakdown on the forest floor was slower during flooding conditions than in dry conditions. Regular floods are natural occurrences that do not affect the leaf production of the Paraná mixed forest, and the leaf processing depends on the oxygen concentrations. Prolonged droughts led to high annual leaf production, which is mainly processed within this forest. Copyright © 2015 John Wiley & Sons, Ltd.

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Vegetation and hydrogeomorphic features of a large lowland river: NDVI patterns summarizing fluvial dynamics and supporting interpretations of ecological patterns

Marchetti

Ramonell

Alberdi

et al. 2020

Earth Surf Processes Landf

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The interactions among hydrogeomorphic features of large lowland rivers regulate the spatio‐temporal fluvial dynamics and influence the occurrence and understanding of the ecological patterns in these systems. We studied the hydrogeomorphic features that explain the fluvial dynamics of the Paraná River floodplain and investigated the usefulness of NDVI patterns in summarizing these dynamics. Information layers related to elevation, drainage network, geomorphic units, runoff dynamics, and NDVI patterns of the study area were generated from multi‐source remote sensing data and fieldwork measurements. All these layers were integrated and analysed in a GIS environment, and the statistical association among them was corroborated. In our study area, the interaction among hydrogeomorphic features determined a centrifugal flooding pattern through which inundation occurs when water from remote courses, fluvial lakes, and secondary tributaries reaches the main channel. The areas closest to the main channel are flooded only when it overflows. Five NDVI patterns statistically different in terms of their means and standard deviations were identified and characterized. These NDVI patterns were significantly associated with elevation, geomorphic units, and runoff dynamics, highlighting their usefulness to characterize the fluvial dynamics and support understanding of the ecological patterns. © 2020 John Wiley & Sons, Ltd.

show abstract

Pulse regime and vegetation communities in fluvial systems: The case of the Parana River floodplain, Argentina

Cited by 22 publications

References 24 publications

Multi-scale analysis of environmental constraints on macrophyte distribution, floristic groups and plant diversity in the Lower Paraná River floodplain

Multi-scale analysis of environmental constraints on macrophyte distribution, floristic groups and plant diversity in the Lower Paraná River floodplain

Linking hydrologic regime, rainfall and leaf litter fall in a riverine forest within the Ramsar Site Humedales Chaco (Argentina)

Vegetation and hydrogeomorphic features of a large lowland river: NDVI patterns summarizing fluvial dynamics and supporting interpretations of ecological patterns

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