Recruitment of riparian plants after restoration of geomorphic complexity in northern Sweden

Herberg, Erik R.; Sarneel, Judith M.

doi:10.1111/avsc.12304

Cited by 4 publications

(2 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The inventoried tributaries in the seedling survey were all restored from timber‐floating structures in a basic or a more enhanced way. At the time of this study, the two different restoration types had no measurable effect on most ecological parameters, including plant cover, soil moisture and germination (Herberg & Sarneel, ; Nilsson et al., ), and we therefore did not consider restoration type in our analysis.…”

Section: Methodsmentioning

confidence: 99%

Local flooding history affects plant recruitment in riparian zones

Sarneel

Bejarano

Oosterhout

2019

J Vegetation Science

Self Cite

View full text Add to dashboard Cite

Aims: Many rivers across the globe are severely impacted by changed flooding regimes, resulting in drastic shifts in vegetation, but the processes driving the exchange of flood-sensitive and flood-tolerant species are understood less. We studied the role of long-term and recent flooding histories for riparian plant recruitment in response to various changes in flooding regime.Location: Vindel River catchment (Northern Sweden). Methods:We experimentally changed long-term flooding regimes by transplanting turfs between high and low elevations in 2000 and in 2014 (n = 8 per treatment). We sowed seeds of five riparian species in both transplanted turfs and non-transplanted controls and counted seedling numbers over two growing seasons. Further, we inventoried natural seedling frequencies in 190 plots in 19 reaches in 2013 and 2014, and related natural seedling numbers to plot flooding history in the period 2012-2014. Results:We observed effects of long-term flooding history in the second year of the transplantation study (2015), but not in the first year. In 2015, turfs transplanted to locations with less flooding resulted in higher plant recruitment while transplantation to sites with more frequent flooding reduced recruitment compared to the controls. Since these differences were only found in recently transplanted turfs and not in older turfs, the legacy effect of long-term flooding history can be transient. In the field seedling survey, similar differences were found between flooding-history categories in 2013, but not in 2014, when the moisture conditions of the most recent year determined flooding.Further, lowest seedling numbers were observed when the previous flooding occurred in winter, and higher seedling numbers when floods occurred in spring or not at all. Conclusions: Both long-term and recent flooding histories can affect plant recruitment, and their influence should be taken into account when designing restoration projects. K E Y W O R D S dispersal filtering, environmental filtering, flood dynamics, historic contingency, legacy effects, plant recruitment window, regime shifts, window of opportunity, zonationThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

show abstract

Section: Methodsmentioning

confidence: 99%

Local flooding history affects plant recruitment in riparian zones

Sarneel

Bejarano

Oosterhout

2019

J Vegetation Science

Self Cite

View full text Add to dashboard Cite

show abstract

“…The movements of waterborne seeds typically involve two phases, that is, primary and secondary dispersals (Chambers & MacMahon, ; Koch, Ailstock, Booth, Shafer, & Magoun, ). Understanding these two phases of dispersal could help elucidate seed dispersal and deposition patterns and help provide guidance for species establishment and maintenance of community species richness (Herberg & Sarneel, ; Pickerell, Schott, & Wyllie‐Echeverria, ; van Leeuwen, Sarneel, van Paassen, Rip, & Bakker, ).…”

Section: Introductionmentioning

confidence: 99%

Floatability and a semiempirical model for resuspension thresholds of hydrochorous seeds

2018

View full text Add to dashboard Cite

Floatability and incipient motion of seeds are the key indicators in primary and secondary dispersal during hydrochory, respectively. Floatability could prolong the time for seeds' survival in water and thereby extend the distance of primary dispersal. Seeds that were deposited but did not germinate may be resuspended and transported by currents farther until permanently stranded. This study aimed to describe and predict the dispersal patterns and movements of seeds with these 2 indicators under static and dynamic water conditions that correspond to the 2 aforementioned dispersal phases. The physical properties and hydrodynamic characteristics of seeds from 3 angiosperm species were used to study the floatability and resuspension thresholds of hydrochorous seeds. Floatability quantified by the number of seeds remaining buoyant varies among the 3 species, implicating their differing capabilities of primary dispersal. Resuspension thresholds of settled seeds were quantified by critical currents (shear velocities) that move seeds at rest on the bed sediment. On the basis of a model of nonuniform sand and collected experimental data, we proposed a model suitable for incipient motion of seeds from the bed. This model can be applied in the evaluation of secondary dispersal potential under different flow conditions. The preliminary research on the movements of seeds in water helps elucidate and determine species distribution and establishment. These factors are important in dispersal ecology.

show abstract