Geomorphic Controls on Floodplain Connectivity, Ecosystem Services, and Sensitivity to Climate Change: An Example From the Lower Missouri River

Jacobson, Robert B.; Bouska, Kristen L.; Bulliner, E. A.; Lindner, G. A.; Paukert, Craig P.

doi:10.1029/2021wr031204

Cited by 10 publications

(5 citation statements)

References 74 publications

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“…Additionally, increased attention has been placed on river-floodplain connectivity and the importance of this lateral connectivity to ecosystem function (Jacobson et al, 2022;Junk, 1999;Opperman et al, 2018). River floodplains and backwaters are recognised as one of the world's most threatened ecosystems (Tockner et al, 2008), resulting in an increased emphasis on multiple aspects of connectivity in ecological restoration.…”

Section: Introductionmentioning

confidence: 99%

“…For highly mobile organisms such as fishes, responses to restoration may be highly dependent on the location and scale of management in a catchment given that fishes use a variety of habitats throughout their life cycle, and require functioning ecosystems and longitudinal connectivity over large spatial extents (Campbell Grant et al., 2007; Fausch et al., 2002). Additionally, increased attention has been placed on river–floodplain connectivity and the importance of this lateral connectivity to ecosystem function (Jacobson et al., 2022; Junk, 1999; Opperman et al., 2018). River floodplains and backwaters are recognised as one of the world's most threatened ecosystems (Tockner et al., 2008), resulting in an increased emphasis on multiple aspects of connectivity in ecological restoration.…”

Section: Introductionmentioning

confidence: 99%

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Evaluating effectiveness of restoration to address current stressors to riverine fish

Rogosch,

Boehm,

Tingley

et al. 2024

Freshwater Biology

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River restoration programmes with the goal of conserving and rehabilitating inland fishes have a multi‐decadal history, but evaluation and synthesis of past restoration actions have been limited by a lack of monitoring and reporting. Given that calls for both monitoring and systematic reviews of restoration have increased, we were interested in the influence that restoration has had on improving conditions for riverine fishes resulting from long‐standing and increasingly prominent stressors. Our objectives were to (1) identify which stressors were targeted in river restoration efforts, (2) determine the proportion of published studies that articulate restoration goals and develop comparative monitoring designs for assessing the effects of restoration on fishes, and (3) conduct a meta‐analysis to synthesise fish responses to restoration projects. We assessed restoration effectiveness for increasing fish density and richness from peer‐reviewed papers published over the past decade using a global systematic review and meta‐analysis. We found that restoration actions addressed major stressors primarily by improving in‐stream habitat (37%), increasing in‐stream longitudinal connectivity (26%) and increasing lateral floodplain connections (9%). Although 81% of studies had comparative monitoring designs (i.e., before/after and control/impact) and stated restoration goals, only 40% of those studies reported sufficient data to be included in the meta‐analysis. Projects which increased in‐stream connectivity had the largest positive effect size on fish density and richness compared to in‐stream habitat improvements and increasing floodplain connections. Time since restoration and restoration size (i.e., geographical footprint) were not strong predictors of fish response effect sizes. Restoration effectiveness was highly variable among project types. Authors of studies included in the meta‐analysis often identified spatial or temporal scale of monitoring, overriding catchment conditions, and recolonisation potential as sources of variability and effectiveness in restoration outcomes. Systematic reporting of these and other covariates may help guide processes in restoration evaluation and provide valuable research insights. Despite increased emphasis on monitoring, incomplete data reporting limited the number of studies that could be included for quantitative meta‐analysis. Persistent emphasis on setting specific criteria (e.g., measurable outcomes of fish response) for restoration goals, project monitoring, data reporting, information sharing and collaborative projects is likely to continue to improve understanding of restoration effectiveness transferable to future endeavours. Our results can be used to support river restoration practitioners with evidence‐based information to evaluate the cost–benefit ratio of competing restoration priorities, and inform restoration planning and implementation for riverine fish.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluating effectiveness of restoration to address current stressors to riverine fish

Rogosch,

Boehm,

Tingley

et al. 2024

Freshwater Biology

Self Cite

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“…Worldwide, there are floodplain lakes permanently connected with the main river, others are permanently isolated from the river, and the majority in which annual and/or multi-annual cycles of potamophases and limnophases occur [28]. The connectivity pattern is a primary factor determining floodplain lakes' biodiversity and water quality [29]. Both matter and energy transferred by the rivers' water [30] affect the biomass and abundance of plants and animals in the aquatic system of the FPL [31].…”

Section: Introductionmentioning

confidence: 99%

Role of Hydrology in Cyanobacterial Blooms in the Floodplain Lakes

Ferencz

Toporowska

Dawidek

2023

Water

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River floodplains are sites of extremely high environmental and ecological value due to high biodiversity. Floodplain lakes (FPLs) are essential parts of complex floodplain ecosystems’ biological and hydro-chemical processes. Clear seasonal cycles, determined by the regime of the parent river and closely linked to climatic conditions, are observed in these lakes. Both the quantity and the quality of water are determined by the functional phases of a floodplain lake; limnophase, when the lake is isolated from the river, and potamophase (inundation), when the floodplain lake is overflowed by the river waters. These phases highly modify lake bathymetry, water balance, chemistry, and biology. Human pressure, mostly dam construction and land use changes, alter the frequency, duration, and intensity of natural cycles of inundation. The majority of large rivers in the Northern Hemisphere have been impacted by human activity. Floodplain lakes are also affected by continuous climate change, due to the alterations of the hydrological regimes. Cyanobacterial blooms in floodplain lakes are often characterized by high qualitative and quantitative annual and long-term variability. The main forces driving cyanobacterial blooms can be found in the flooding dynamics and intensity influencing hydraulic residence time and the concentration of biogenic compounds in lake water. Cyanotoxin production and seasonal dynamics in floodplain lakes have been rarely studied, particularly in connection with the hydrological regime. Moreover, the effects of cyanobacterial blooms and their toxicity to organisms inhabiting floodplain lakes, connected rivers, and floodplains are poorly understood. Therefore, knowledge of the processes controlling floodplain lakes’ ecological conditions is crucial to implementing water management and restoration practices, protecting those fragile and precious ecosystems from degradation and possible extension.

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“…The hydrological shifts in the future will also lead to changes in floodplain connectivity in unregulated floodplains. This may result in increased nitrate removal by denitrification, as simulated for the Lower Missouri River (Jacobson et al, 2022). Nitrate removal varies in floodplain habitats with different contact with river water (Scaroni et al, 2011).…”

mentioning

confidence: 96%

Impact of Climate Change on Water Sources and River‐Floodplain Mixing in the Natural Wetland Floodplain of Biebrza River

Berezowski,

Partington

2023

Water Resources Research

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The origins of river and floodplain waters (groundwater, rainfall, and snowmelt) and their extent during overbank flow events strongly impact ecological processes such as denitrification and vegetation development. However, the long‐term sensitivity of floodplain water signatures to climate change remains elusive. We examined how the integrated hydrological model HydroGeoSphere and the Hydraulic Mixing‐Cell method could help us understand the long‐term impact of climate change on water signatures and their spatial distribution in the protected Biebrza River Catchment in northeastern Poland. Our model relied on 20th century Reanalysis Data from 1881 to 2015 and an ensemble of EURO‐CORDEX simulations for representative concentration pathways (RCP) 2.6, 4.5, and 8.5 from 2006 to 2099. The historical component of the simulations was subjected to extensive multiple‐variable validation from 1881 to 2019. The results show that the extents of water sources were rather stable in the floodplain in the 1881–2015 period. The projected future impacts were variable with each analyzed RCP, but in all cases, different significant trends were present for the spatial distribution of water sources and for the river‐floodplain mixing. However, the total volume of water from different sources was less sensitive to climate change than the dominant sources and spatial distribution of water. The simulation results highlight the impact of climate change on the extent of water sources in temperate zone wetlands with significant implications for ecological processes and management. These results also underscore the urgent need to leverage such modeling studies to inform protective and preservation strategies of floodplain wetlands.

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Geomorphic Controls on Floodplain Connectivity, Ecosystem Services, and Sensitivity to Climate Change: An Example From the Lower Missouri River

Cited by 10 publications

References 74 publications

Evaluating effectiveness of restoration to address current stressors to riverine fish

Evaluating effectiveness of restoration to address current stressors to riverine fish

Role of Hydrology in Cyanobacterial Blooms in the Floodplain Lakes

Impact of Climate Change on Water Sources and River‐Floodplain Mixing in the Natural Wetland Floodplain of Biebrza River

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