Response diversity of free-floating plants to nutrient stoichiometry and temperature: growth and resting body formation

Free-floating plants, like most groups of aquatic primary producers, can become nuisance vegetation under certain conditions. On the other hand, there is substantial optimism for the applied uses of free-floating plants, such as wastewater treatment, biofuel production, and aquaculture. Therefore, u...

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Main Author: Michael J. McCann
Format: Article
Language:English
Published: PeerJ Inc. 2016-03-01
Series:PeerJ
Subjects:
Online Access:https://peerj.com/articles/1781.pdf
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author Michael J. McCann
author_facet Michael J. McCann
author_sort Michael J. McCann
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description Free-floating plants, like most groups of aquatic primary producers, can become nuisance vegetation under certain conditions. On the other hand, there is substantial optimism for the applied uses of free-floating plants, such as wastewater treatment, biofuel production, and aquaculture. Therefore, understanding the species-specific responses of floating plants to abiotic conditions will inform both management decisions and the beneficial applications of these plants. I measured the responses of three floating plant species common in the northeast United States (Lemna minor, Spirodela polyrhiza, and Wolffia brasiliensis) to nutrient stoichiometry (nitrogen and phosphorus) and temperature in the laboratory. I also used survey data to determine the pattern of species richness of floating plants in the field and its relationship with the dominance of this group. Floating plant species exhibited unique responses to nutrient stoichiometry and temperature in the laboratory, especially under low temperatures (18 °C) and low nutrient conditions (0.5 mg N L−1, 0.083 mg P L−1). The three species displayed an apparent tradeoff with different strategies of growth or dormancy. In the field, water bodies with three or more species of floating plants were not more frequently dominated by this group. The response diversity observed in the lab may not be associated with the dominance of this group in the field because it is masked by environmental variability, has a weak effect, or is only important during transient circumstances. Future research to develop applied uses of floating plants should examine response diversity across a greater range of species or clones and environmental conditions.
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spelling doaj.art-922db6306f334c8ab25e118d459f8a422023-12-03T11:18:42ZengPeerJ Inc.PeerJ2167-83592016-03-014e178110.7717/peerj.1781Response diversity of free-floating plants to nutrient stoichiometry and temperature: growth and resting body formationMichael J. McCannFree-floating plants, like most groups of aquatic primary producers, can become nuisance vegetation under certain conditions. On the other hand, there is substantial optimism for the applied uses of free-floating plants, such as wastewater treatment, biofuel production, and aquaculture. Therefore, understanding the species-specific responses of floating plants to abiotic conditions will inform both management decisions and the beneficial applications of these plants. I measured the responses of three floating plant species common in the northeast United States (Lemna minor, Spirodela polyrhiza, and Wolffia brasiliensis) to nutrient stoichiometry (nitrogen and phosphorus) and temperature in the laboratory. I also used survey data to determine the pattern of species richness of floating plants in the field and its relationship with the dominance of this group. Floating plant species exhibited unique responses to nutrient stoichiometry and temperature in the laboratory, especially under low temperatures (18 °C) and low nutrient conditions (0.5 mg N L−1, 0.083 mg P L−1). The three species displayed an apparent tradeoff with different strategies of growth or dormancy. In the field, water bodies with three or more species of floating plants were not more frequently dominated by this group. The response diversity observed in the lab may not be associated with the dominance of this group in the field because it is masked by environmental variability, has a weak effect, or is only important during transient circumstances. Future research to develop applied uses of floating plants should examine response diversity across a greater range of species or clones and environmental conditions.https://peerj.com/articles/1781.pdfSpecies richnessNutrient stoichiometryResponse traitsFree-floating plantsDuckweedAquatic macrophytes
spellingShingle Michael J. McCann
Response diversity of free-floating plants to nutrient stoichiometry and temperature: growth and resting body formation
PeerJ
Species richness
Nutrient stoichiometry
Response traits
Free-floating plants
Duckweed
Aquatic macrophytes
title Response diversity of free-floating plants to nutrient stoichiometry and temperature: growth and resting body formation
title_full Response diversity of free-floating plants to nutrient stoichiometry and temperature: growth and resting body formation
title_fullStr Response diversity of free-floating plants to nutrient stoichiometry and temperature: growth and resting body formation
title_full_unstemmed Response diversity of free-floating plants to nutrient stoichiometry and temperature: growth and resting body formation
title_short Response diversity of free-floating plants to nutrient stoichiometry and temperature: growth and resting body formation
title_sort response diversity of free floating plants to nutrient stoichiometry and temperature growth and resting body formation
topic Species richness
Nutrient stoichiometry
Response traits
Free-floating plants
Duckweed
Aquatic macrophytes
url https://peerj.com/articles/1781.pdf
work_keys_str_mv AT michaeljmccann responsediversityoffreefloatingplantstonutrientstoichiometryandtemperaturegrowthandrestingbodyformation