Variations in aquatic macrophyte phenology across three temperate lakes in the Coeur d’Alene Basin

Torso, Kathleen; Scofield, Ben D.; Chess, Dale W.

doi:10.1016/j.aquabot.2020.103209

Cited by 6 publications

(5 citation statements)

References 16 publications

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“…In short, P. crispus can capitalize on early phenology to grow in locations that have insufficient light later in the growing season. In ecosystems with strong seasonality, as in northern temperate lakes, the influence of temperature on community structure can occur through differences in occupancy of different phenological niches [41,42]. The role of phenology in invasions remains an area of active research, especially as it relates to competition avoidance in early stages of invasion [104].…”

Section: Discussionmentioning

confidence: 99%

“…Light is a critical determinant of all plant growth that is particularly constraining in aquatic environments, where photosynthetically active radiation rapidly decays with water depth and transparency [35,40]. The seasonality of temperate freshwater systems is a strong driver of species distribution and annual growth patterns, and phenological niche differentiation, or use of distinct seasonal or temporal growth windows, influences community structure [36,41,42].Two of the most widespread and problematic invasive aquatic plant species in temperate North America are Myriophyllum spicatum L. (Haloragaceae; Eurasian watermilfoil) and Potamogeton crispus L. (Potamogetonaceae; curlyleaf pondweed). Both of these species receive significant attention from resource managers, yet their niche overlap and interactions with native plant species-and thus their potential competitive impacts-may be quite different.…”

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confidence: 99%

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confidence: 99%

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Niche Models Differentiate Potential Impacts of Two Aquatic Invasive Plant Species on Native Macrophytes

2020

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Potamogeton crispus (curlyleaf pondweed) and Myriophyllum spicatum (Eurasian watermilfoil) are widely thought to competitively displace native macrophytes in North America. However, their perceived competitive superiority has not been comprehensively evaluated. Coexistence theory suggests that invader displacement of native species through competitive exclusion is most likely where high niche overlap results in competition for limiting resources. Thus, evaluation of niche similarity can serve as a starting point for predicting the likelihood of invaders having direct competitive impacts on resident species. Across two environmental gradients structuring macrophyte communities—water depth and light availability—both P. crispus and M. spicatum are thought to occupy broad niches. For a third dimension, phenology, the annual growth cycle of M. spicatum is typical of other species, whereas the winter-ephemeral phenology of P. crispus may impart greater niche differentiation and thus lower risk of native species being competitively excluded. Using an unprecedented dataset comprising 3404 plant surveys from Minnesota collected using a common protocol, we modeled niches of 34 species using a probabilistic niche framework. Across each niche dimension, P. crispus had lower overlap with native species than did M. spicatum; this was driven in particular by its distinct phenology. These results suggest that patterns of dominance seen in P. crispus and M. spicatum have likely arisen through different mechanisms, and that direct competition with native species is less likely for P. crispus than M. spicatum. This research highlights the utility of fine-scale, abundance-based niche models for predicting invader impacts.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Niche Models Differentiate Potential Impacts of Two Aquatic Invasive Plant Species on Native Macrophytes

2020

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“…For example, shading by the free-floating duckweed in a mesocosm experiment modified submerged charophyte morphology and Conversely, increased light availability through changes in riparian vegetation canopy associated with stochastic weather events explained an increase in gross primary production by macroalgae in streams altering the overall growing season (Roberts et al 2007;Mulholland et al 2009). Other plant influences on BPP phenology included changes in community structure through the arrival of invasive plants (Toth et al 2019;Torso et al 2020;Glisson et al 2022), adaptation through hybridization (Glisson and Larkin 2021), and sexspecific seasonal variation (Hoffmann et al 2014). In terms of interactions with fauna, event timing was altered by changes in herbivory (Franceschini et al 2010;Pinero-Rodriguez et al 2021) including gut passage of seeds favoring earlier germination (Figuerola et al 2005).…”

Section: What Information On Bpp Phenology Is Available and What Are ...mentioning

confidence: 99%

Changing phenology of benthic primary producers in inland waters: Current knowledge and future directions

Botrel,

Maranger,

Alirangues Nuñez

et al. 2024

Limnol Oceanogr Letters

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Benthic primary producers (BPP) in inland waters, including aquatic macrophytes and periphyton, are foundational habitats that are highly sensitive to multiple human drivers of environmental change. However, long‐term seasonal monitoring of BPP is limited, leaving us with little information on the cause, directionality, and consequences of the potential shifts in timing of BPP life cycle events. Here, we review the literature on the phenological changes of BPP and show that BPP respond primarily to temperature, but also to other interactive drivers related to climate change and eutrophication. In addition, we present four rare case studies where BPP display strong and earlier shifts in event timing associated with increasing temperature and discuss potential impacts of these changes on ecosystem functioning. Given the responsive nature of BPP to multiple human drivers, we provide suggestions on how to improve basic monitoring to better understand the future impact of phenological changes of this critical habitat.

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“…The model was obtained from Geospatial Data Cloud. 2 Among various hydrological parameters, flood rising time, flood recession time, and inundation duration were considered as important factors that influence the growth of macrophytes (Liu et al, 2019;Torso et al, 2020). Hydrological variables such as flood rising time, flood recession time, and inundation duration at different sampling sites were calculated based on daily water-level data and elevation data.…”

Section: Environmental Variablesmentioning

confidence: 99%

Community Trait Responses of Three Dominant Macrophytes to Variations in Flooding During 2011–2019 in a Yangtze River-Connected Floodplain Wetland (Dongting Lake, China)

et al. 2021

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In lacustrine wetlands connected to rivers, the changes in flood regimes caused by hydrological projects lead to changes in the community traits of dominant macrophytes and, consequently, influence the structure and function of wetland vegetation. However, community trait responses of macrophytes to the timing and duration of flood disturbance have been rarely quantified. In 2011–2019, we investigated plant species diversity, density, and biomass in three dominant macrophyte communities (Carex brevicuspis C.B. Clarke, Miscanthus sacchariflorus (Maxim.) Hackel, and Polygonum hydropiper L.) through monthly field surveys in Dongting Lake wetlands. Partial least squares regressions were used to analyze how the variations in hydrological regimes affected plant community traits. Apparent inter-annual fluctuations in plant community traits were detected during 2011–2019. The species richness and Shannon index of diversity of Miscanthus and Polygonum communities increased, whereas the Shannon index of diversity of Carex community decreased. Variation in flooding had a greater effect on Polygonum and Carex community traits than on Miscanthus community traits. Flooding disturbed all plant communities, especially when the duration and timing varied. Shorter inundation periods caused the biomass of Miscanthus community to decline, and that of Carex and Polygonum communities to increase. Earlier flood recession caused the species richness and Shannon index of diversity of Polygonum and Miscanthus community to increase, and those of Carex community to decrease. These findings imply that shorter inundation durations and earlier flood recession generated by the operation of the Three Gorges Dam have changed the macrophyte growth pattern.

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Variations in aquatic macrophyte phenology across three temperate lakes in the Coeur d’Alene Basin

Cited by 6 publications

References 16 publications

Niche Models Differentiate Potential Impacts of Two Aquatic Invasive Plant Species on Native Macrophytes

Niche Models Differentiate Potential Impacts of Two Aquatic Invasive Plant Species on Native Macrophytes

Changing phenology of benthic primary producers in inland waters: Current knowledge and future directions

Community Trait Responses of Three Dominant Macrophytes to Variations in Flooding During 2011–2019 in a Yangtze River-Connected Floodplain Wetland (Dongting Lake, China)

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