Temporal variability of streamflow and plant species abundance on islets as they relate to <scp>ENSO</scp> events downstream from an inversion‐type reservoir

Dubeau, S.; Assani, Ali A.; Ibrahim, Ghassen; Rodríguez, Marco A.

doi:10.1002/rra.3218

Cited by 3 publications

(3 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During the 2008 growing season (April to September), there were many days when relatively large flows (> 100m³/s) were released [36], such that islets remained submerged during this high flow period. This prolonged immersion led to the near disappearance of terrestrial species on the islets the following year [26]. This clearly shows that the duration of immersion of sites significantly affects the number of terrestrial species.…”

Section: International Journal Of Environmental Sciences and Natural Resources Conclusionmentioning

confidence: 77%

“…Thus, during the growing season (April to September) when water levels are relatively high, the number of terrestrial species decreases on these bars due to the relatively extensive period during which these sites are under water. Dubeau et al [26], for their part, showed that the duration of immersion of islets in springtime downstream from the Matawin dam strongly influences the number of terrestrial species on these islets. Thus, when islets remain under water for long periods in springtime, as was the case in 2008 (La Niña year), the number of terrestrial species decreases markedly to be replaced by obligate wetland species.…”

Section: International Journal Of Environmental Sciences and Natural Resourcesmentioning

confidence: 99%

See 1 more Smart Citation

The Influence of the Characteristics of Geomorphological Deposits on Terrestrial Plant Species Richness in the Low Flow Channel Downstream from an Inversion-Type Reservoir

Assani

2021

IJESNR

View full text Add to dashboard Cite

Section: International Journal Of Environmental Sciences and Natural Resources Conclusionmentioning

confidence: 77%

Section: International Journal Of Environmental Sciences and Natural Resourcesmentioning

confidence: 99%

The Influence of the Characteristics of Geomorphological Deposits on Terrestrial Plant Species Richness in the Low Flow Channel Downstream from an Inversion-Type Reservoir

Assani

2021

IJESNR

View full text Add to dashboard Cite

“…In Quebec, these impacts will be greater downstream of dams characterized by the inversiontype management method than downstream of dams characterized by other types of management methods. This strong variability in the seasonal flows results a gradual increase terrestrial plant species in the low flow channel downstream from Matawin Reservoir dependent on obligate wetland species [30,31]. This aspect should be considered in policy for developing flow management standards intended to restore the ecological integrity of regulated rivers.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Seasonal Flow Rate Change Indices Downstream of Three Types of Dams in Southern Quebec (Canada)

Delisle

Assani

2021

Water

Self Cite

View full text Add to dashboard Cite

The objective of this study is to use two hydrological indices (coefficients of variation and immoderation) to analyze the impacts of dam management methods on seasonal daily flow rate change downstream of three dams: Manouane (diversion-type management method), Ouareau (natural-type management method) and Matawin (inversion-type management method). The results show that this change is far greater downstream of the Matawin dam (characterized by an inversion-type management method) than downstream of the two other dams. Moreover, downstream of the Matawin dam, this daily flow rate change increases significantly over time, while decreasing downstream of the two other dams and in natural rivers. Lastly, this change is better correlated with climate downstream of the Ouareau dam than downstream of the two other dams. It is positively correlated with winter and spring temperatures as well as summer and fall rain. Contrary commonly accepted hypothesis, this study shows that the impacts of dams generally result in an increase of the seasonal flow rate change in Quebec.

show abstract

Riparian plant species differ in sensitivity to both the mean and variance in groundwater stores

Steinberg

Eichhorst

Rudgers

2020

Journal of Plant Ecology

View full text Add to dashboard Cite

Aims Determining the ecological consequences of interactions between slow changes in long-term climate means and amplified variability in climate is an important research frontier in plant ecology. We combined the recent approach of climate sensitivity functions with a revised hydrological ‘bucket model’ to improve predictions on how plant species will respond to changes in the mean and variance of groundwater resources. Methods We leveraged spatiotemporal variation in long-term datasets of riparian vegetation cover and groundwater levels to build the first groundwater sensitivity functions (GSFs) for common plant species of dryland riparian corridors. Our results demonstrate the value of this approach to identifying which plant species will thrive (or fail) in an increasingly variable climate layered with declining groundwater stores. Important findings Riparian plant species differed in sensitivity to both the mean and variance in groundwater levels. Rio Grande cottonwood (Populus deltoides ssp. wislizenii) cover was predicted to decline with greater interannual groundwater variance, while coyote willow (Salix exigua) and other native wetland species were predicted to benefit from greater year-to-year variance. No non-native species were sensitive to groundwater variance, but patterns for Russian olive (Elaeagnus angustifolia) predict declines under deeper mean groundwater tables. Warm air temperatures modulated groundwater sensitivity for cottonwood, which was more sensitive to variability in groundwater in years/sites with warmer maximum temperatures than in cool sites/periods. Cottonwood cover declined most with greater intra-annual coefficients of variation (CV) in groundwater, but was not significantly correlated with inter-annual CV, perhaps due to the short time series (16 y) relative to cottonwood lifespan. In contrast, non-native tamarisk (Tamarix chinensis) cover increased with both intra- and inter-annual CV in groundwater. Altogether, our results predict that changes in groundwater variability and mean will affect riparian plant communities through the differential sensitivities of individual plant species to mean versus variance in groundwater stores.

show abstract

Temporal variability of streamflow and plant species abundance on islets as they relate to ENSO events downstream from an inversion‐type reservoir

Abstract: The goal of this study was to analyse the impacts of the sequence of

Cited by 3 publications

References 52 publications

The Influence of the Characteristics of Geomorphological Deposits on Terrestrial Plant Species Richness in the Low Flow Channel Downstream from an Inversion-Type Reservoir

The Influence of the Characteristics of Geomorphological Deposits on Terrestrial Plant Species Richness in the Low Flow Channel Downstream from an Inversion-Type Reservoir

Comparison of Seasonal Flow Rate Change Indices Downstream of Three Types of Dams in Southern Quebec (Canada)

Riparian plant species differ in sensitivity to both the mean and variance in groundwater stores

Contact Info

Product

Resources

About