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Updated: Mar 13, 2026

Watershed Planning within a Quantitative Scenario Analysis Framework

Watershed Planning within a Quantitative Scenario Analysis Framework

Published on: July 24, 2016

Spatial processes structuring riparian plant communities in agroecosystems: implications for restoration.

Bérenger Bourgeois^1,2, Eduardo González^3,4, Anne Vanasse⁵

¹Département de Phytologie, Faculté des Sciences de l'Agriculture et de l'Alimentation, Université Laval, 2425 rue de l'agriculture, Québec, Québec, G1V 0A6, Canada. berenger.bourgeois.1@ulaval.ca.

Ecological Applications : a Publication of the Ecological Society of America

|October 19, 2016

Summary

Restored riparian plant communities are primarily structured by upstream-downstream water flow, not local conditions. Seed traits, influenced by water flow, are key to species composition in these vital riverbank ecosystems.

Keywords:

agricultural landscapes ecological restoration eigenvector maps hydrochory plant traits spatial autocorrelation unidirectional vs. bidirectional spatial processes watercourse vs. overland spatial processes

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Published on: June 7, 2024

Area of Science:

Ecology
Environmental Science
Botany

Background:

Human activities like flood regulation disrupt hydrological connectivity, impacting riparian plant communities.
Landscape-scale processes are often overlooked in riparian restoration, despite their influence on community recovery.

Purpose of the Study:

To investigate spatial processes structuring riparian plant communities in restored agricultural watersheds.
To assess the role of landscape-scale factors versus local conditions in riparian restoration.
To identify the ecological mechanisms and plant traits driving spatial patterns.

Main Methods:

Surveyed plant composition in 51 restored riparian zones across two agricultural watersheds in Québec.
Used Moran's eigenvector maps and asymmetric eigenvector maps to model spatial autocorrelation.
Employed regression trees to link species traits (seed and morphological) to spatial gradients.

Main Results:

Riparian community structure was predominantly influenced by unidirectional upstream-downstream spatial gradients.
These upstream-downstream gradients explained more variation in species composition than other spatial patterns.
Seed traits were more influential than morphological traits in explaining species responses to spatial gradients.

Conclusions:

Water flow is a major force structuring riparian plant communities, filtering species by seed traits and favoring long-distance dispersal.
Preserving watershed-scale hydrological connectivity is crucial for effective riparian restoration.
Restoration efforts should consider upstream-to-downstream processes to enhance riverine ecological integrity.