Absorption and translocation of copper and arsenic in an aquatic macrophyte Myriophyllum alterniflorum DC. in oligotrophic and eutrophic conditions

AbstractThe degree to which dispersal limitation interacts with environmental filtering has intrigued metacommunity ecologists and molecular biogeographers since the beginning of both research disciplines. Since genetic methods are superior to coarse proxies of dispersal, understanding how environmental and geographic factors influence population genetic structure is becoming a fundamental issue for population genetics and also one of the most challenging avenues for metacommunity ecology. In this study of the aquatic macrophyte Myriophyllum alterniflorum DC., we explored the spatial genetic variation of eleven populations from the Iberian Plateau by means of microsatellite loci, and examined if the results obtained through genetic methods match modern perspectives of metacommunity theory. To do this, we applied a combination of robust statistical routines including network analysis, causal modelling and multiple matrix regression with randomization. Our findings revealed that macrophyte populations clustered into genetic groups that mirrored their geographic distributions. Importantly, we found a significant correlation between genetic variation and geographic distance at the regional scale. By using effective (genetic) dispersal estimates, our results are broadly in line with recent findings from metacommunity theory and re-emphasize the need to go beyond the historically predominant paradigm of understanding environmental heterogeneity as the main force driving macrophyte diversity patterns.

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Propagation and production of an endangered aquatic macrophyte: Texas wildrice ( Zizania texana Hitchc.)

Native Plants Journal ◽

10.3368/npj.18.1.77 ◽

2017 ◽

Vol 18 (1) ◽

pp. 77-85 ◽

Cited By ~ 1

Author(s):

Jeffrey T Hutchinson

Keyword(s):

Aquatic Macrophyte

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Purification of Pisciculture Waters through Cultivation and Harvesting of Aquatic Biomass

Water Science & Technology ◽

10.2166/wst.1987.0103 ◽

1987 ◽

Vol 19 (10) ◽

pp. 113-121 ◽

Cited By ~ 2

Author(s):

C. Simeon ◽

M. Silhol

Keyword(s):

Aquatic Macrophyte ◽

Dry Weight ◽

Final Decision ◽

Effluent Water ◽

Aquatic Biomass ◽

Growing Period ◽

European Climate ◽

Nuclear Plants ◽

Economical Optimization ◽

Water Hyacinths

The study of thermal wastes from the nuclear plants around Pierrelatte for agricultural, piscicultural, energy and environmental protection purposes resulted in the establishment of a pilot facility as early as 1976. An aquatic macrophyte pilot facility has been operational since 1983 to study the use of water hyacinths from the aspects of energy and ecology. The results obtained suggest that production yields for the 7 month growing period should exceed 60 metric tons (MT) (dry weight) per hectare in a European climate, and that such crops can feasibly be cultivated in temperate regions. The pilot facility is supplied with pisciculture effluent water, making it possible to quantify the stabilization power of the plants. Without primary decantation, with a retention time of 4 days and stabilization with water hyacinths only, the organic matter waste pond surface area required is 3.5 m2/m2 of pisciculture pond. Any primary or secondary facilities will lead to a reduction of these areas. The final decision will depend on the economical optimization of all the wastewater.

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Influence of environmental factors on the genetic variation of the aquatic macrophyte Ranunculus subrigidus on the Qinghai-Tibetan Plateau

BMC Evolutionary Biology ◽

10.1186/s12862-019-1559-0 ◽

2019 ◽

Vol 19 (1) ◽

Cited By ~ 2

Author(s):

Zhigang Wu ◽

Xinwei Xu ◽

Juan Zhang ◽

Gerhard Wiegleb ◽

Hongwei Hou

Keyword(s):

Genetic Diversity ◽

Tibetan Plateau ◽

Environmental Factors ◽

Local Adaptation ◽

Aquatic Macrophyte ◽

Spatial Genetic Structure ◽

Long Distance ◽

Elevation Gradients ◽

Mantel Tests ◽

Genetic Patterns

Abstract Background Due to the environmental heterogeneity along elevation gradients, alpine ecosystems are ideal study objects for investigating how ecological variables shape the genetic patterns of natural species. The highest region in the world, the Qinghai-Tibetan Plateau, is a hotspot for the studies of evolutionary processes in plants. Many large rivers spring from the plateau, providing abundant habitats for aquatic and amphibious organisms. In the present study, we examined the genetic diversity of 13 Ranunculus subrigidus populations distributed throughout the plateau in order to elucidate the relative contribution of geographic distance and environmental dissimilarity to the spatial genetic pattern. Results A relatively low level of genetic diversity within populations was found. No spatial genetic structure was suggested by the analyses of molecular variance, Bayesian clustering analysis and Mantel tests. Partial Mantel tests and multiple matrix regression analysis showed a significant influence of the environment on the genetic divergence of the species. Both climatic and water quality variables contribute to the habitat heterogeneity of R. subrigidus populations. Conclusions Our results suggest that historical processes involving long-distance dispersal and local adaptation may account for the genetic patterns of R. subrigidus and current environmental factors play an important role in the genetic differentiation and local adaptation of aquatic plants in alpine landscapes.

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Interactions between a planktivorous fish and planktonic microcrustaceans mediated by the biomass of aquatic macrophytes

Journal of Plankton Research ◽

10.1093/plankt/fbaa061 ◽

2021 ◽

Author(s):

Bárbara Angélio Quirino ◽

Franco Teixeira de Mello ◽

Sabrina Deosti ◽

Claudia Costa Bonecker ◽

Ana Lúcia Paz Cardozo ◽

...

Keyword(s):

Aquatic Macrophyte ◽

Plant Biomass ◽

Flow Speed ◽

Trophic Niche ◽

Planktivorous Fish ◽

Low Flow ◽

High Biomass ◽

Predator Prey ◽

Cladoceran Species ◽

Macrophyte Biomass

Abstract Habitat complexity is recognized to mediate predator–prey relationships by offering refuge or not. We investigated the availability of planktonic microcrustaceans and the diet of a planktivorous fish (Hyphessobrycon eques) at different levels (low, intermediate and high) of aquatic macrophyte biomass. Sampling was carried out in a river with low flow speed, located in a Neotropical floodplain. We collected fish and microcrustaceans in macrophyte stands with variations in biomass. There were no differences in microcrustacean density in the water among the levels of macrophyte biomass, but microcrustacean richness and diet composition of H. eques differed. Microcrustacean richness and trophic niche breadth of the planktivorous fish were higher in high biomass stands. There was high consumption of a small cladoceran species in low macrophyte biomass, which was replaced by larger species, such as copepods, in intermediate and high biomass. Thus, the selection of some species was different among the biomass levels. These results suggest that plant biomass plays an important role in the interaction between fish and microcrustaceans, and prey characteristics such as size, escape ability and energy value make them more or less subject to predation by fish according to habitat structuring.

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Physiological Effects of Exposure to Copper and Chromium in Three Floating Aquatic Macrophyte Species

Water Air & Soil Pollution ◽

10.1007/s11270-020-04960-w ◽

2021 ◽

Vol 232 (1) ◽

Author(s):

Débora Cristina de Souza ◽

Ana Carla Fontaneli ◽

Ana Paula Peron ◽

Sandro Froehner

Keyword(s):

Aquatic Macrophyte ◽

Physiological Effects ◽

Macrophyte Species

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Is the aquatic macrophyte Crassula helmsii a genuine copper hyperaccumulator?

Plant and Soil ◽

10.1007/s11104-021-04955-4 ◽

2021 ◽

Author(s):

Amelia Corzo Remigio ◽

Mansour Edraki ◽

Alan J. M. Baker ◽

Antony van der Ent

Keyword(s):

Aquatic Macrophyte

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A mechanistic model for submerged aquatic macrophyte photosynthesis: Hydrilla in ambient and elevated CO2

Ecological Modelling ◽

10.1016/0304-3800(95)00127-1 ◽

1996 ◽

Vol 89 (1-3) ◽

pp. 133-146 ◽

Cited By ~ 7

Author(s):

De-Xing Chen ◽

M.B. Coughenour

Keyword(s):

Elevated Co2 ◽

Aquatic Macrophyte ◽

Mechanistic Model

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Seasonal changes in water quality and macrophytes and the impact of cattle on tropical floodplain waterholes

Marine and Freshwater Research ◽

10.1071/mf12114 ◽

2012 ◽

Vol 63 (9) ◽

pp. 788 ◽

Cited By ~ 17

Author(s):

N. E. Pettit ◽

T. D. Jardine ◽

S. K. Hamilton ◽

V. Sinnamon ◽

D. Valdez ◽

...

Keyword(s):

Water Quality ◽

Seasonal Changes ◽

Aquatic Macrophyte ◽

Plant Cover ◽

Critical Role ◽

Dry Season ◽

Nutrient Concentrations ◽

Wet Season ◽

Dry Tropics ◽

The Impact

The present study indicates the critical role of hydrologic connectivity in floodplain waterholes in the wet–dry tropics of northern Australia. These waterbodies provide dry-season refugia for plants and animals, are a hotspot of productivity, and are a critical part in the subsistence economy of many remote Aboriginal communities. We examined seasonal changes in water quality and aquatic plant cover of floodplain waterholes, and related changes to variation of waterhole depth and visitation by livestock. The waterholes showed declining water quality through the dry season, which was exacerbated by more frequent cattle usage as conditions became progressively drier, which also increased turbidity and nutrient concentrations. Aquatic macrophyte biomass was highest in the early dry season, and declined as the dry season progressed. Remaining macrophytes were flushed out by the first wet-season flows, although they quickly re-establish later during the wet season. Waterholes of greater depth were more resistant to the effects of cattle disturbance, and seasonal flushing of the waterholes with wet-season flooding homogenised the water quality and increased plant cover of previously disparate waterholes. Therefore, maintaining high levels of connectivity between the river and its floodplain is vital for the persistence of these waterholes.

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