Litter decomposition and nutrient dynamics of four macrophytes in intact, restored, and constructed freshwater marshes of Canada

Author:

Dong Dan1ORCID,Badiou Pascal2,Moore Tim R.1,von Sperber Christian1

Affiliation:

1. Department of Geography McGill University Montreal Quebec Canada

2. Institute for Wetland and Waterfowl Research Ducks Unlimited Canada Stonewall Manitoba Canada

Abstract

The restoration and construction of wetlands offer opportunities to rewet soils, inhibit decomposition, and enhance nutrient retention in decomposing litters. Here, we report the decomposition rates and nutrient dynamics of macrophyte litters in intact, restored, and constructed wetlands. A 2.1‐year litterbag experiment of four common freshwater macrophytes (Phalaris arundinacea, Phragmites australis, Scirpus cyperinus, and Typha latifolia) was conducted in eight freshwater marshes (three intact, four restored, and one constructed) within three sites in Manitoba and Ontario, Canada, which varied in restoration age, inundation periods, and surrounding land uses. Litter mass loss and N and P dynamics were measured. Litter decomposition rates (k) followed the order of P. arundinacea (0.42 ± 0.03 year−1) > T. latifolia (0.31 ± 0.03 year−1) > P. australis (0.19 ± 0.01 year−1) > S. cyperinus (0.13 ± 0.01 year−1) in most wetlands and were positively correlated to the initial litter N concentration. Litters decomposed fastest under seasonally inundated conditions rather than permanent inundation. N and P retention in litters were significantly affected by both initial litter N and P concentration and wetland surrounding land uses. After 2.1 years of decomposition, the N:P ratio of all litters converged to 20 to 28:1, regardless of the initial litter N:P ratio or N or P concentrations. The effectiveness of wetland restoration in slowing decomposition and enhancing nutrient accumulation depends on the quality of the input litters and wetland characteristics, including inundated periods and surrounding anthropogenic disturbances.

Funder

Natural Sciences and Engineering Research Council of Canada

Publisher

Wiley

Reference56 articles.

1. Agriculture and Agri‐Food Canada(2020)Annual space‐based crop inventory for Canada 2020. Agroclimate Geomatics and Earth Observation Division Science and Technology Branch.https://agriculture.canada.ca/atlas/rest/services/imageservices/annual_crop_inventory_2020/ImageServer(accessed 03 Sep 2023)

2. Agriculture and Agri‐Food Canada(2021)Annual space‐based crop inventory for Canada 2021. Agroclimate Geomatics and Earth Observation Division Science and Technology Branch.https://agriculture.canada.ca/atlas/rest/services/imageservices/annual_crop_inventory_2021/ImageServer(accessed 03 Sep 2023)

3. Evaluation of Analytical Methods for Total Phosphorus in Organic Amendments

4. Phosphorus Retention in Intact and Drained Prairie Wetland Basins: Implications for Nutrient Export

5. Hydroperiod Influence on Breakdown of Leaf Litter in Cypress-gum Wetlands

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