Interactive effects of dietary phosphorus and iron on <i>Daphnia</i> life history

Lind, Patrick R.; Jeyasingh, Punidan D.

doi:10.1002/lno.10763

Cited by 13 publications

(19 citation statements)

References 56 publications

(76 reference statements)

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“…Algal stoichiometry is an important factor regulating zooplankton growth rates, reproductive traits, and population growth (Lind & Jeyasingh, 2017). Moreover, we do not understand how changes in species composition will affect higher trophic levels.…”

Section: Basal Trophic Levelsmentioning

confidence: 99%

“…For example, changes in the occurrence of various diatoms or phytoplankton species may correspond to stoichiometric changes of algal food resources. Algal stoichiometry is an important factor regulating zooplankton growth rates, reproductive traits, and population growth (Lind & Jeyasingh, 2017). Thus, future research on patterns of change in phytoplankton and photosynthetic periphyton species and the implications of such change is needed.…”

Section: Diatoma Vulgaris Encyonema Caespitosum Pinnularia Microstamentioning

confidence: 99%

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A review of the species, community, and ecosystem impacts of road salt salinisation in fresh waters

2019

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Freshwater ecosystems worldwide are threatened by salinisation caused by human activities. Scientific attention on the ecological impacts of salinisation from road deicing salts is increasing exponentially. Spanning multiple trophic levels and ecosystem types, we review and synthesise the ecological impacts of road salt in freshwater ecosystems to understand species‐, community‐, and ecosystem‐level responses. In our review, we identify knowledge gaps that we hope will motivate future research directions. We found that road salts negatively affect species at all trophic levels, from biofilms to fish. The concentration at which road salt triggered an effect varied considerably. Species‐level impacts were generally sub‐lethal, leading to reductions in growth and reproduction, which can be magnified by natural stressors such as predation. Community‐level impacts including reductions of biodiversity were common, leading to communities of salt‐tolerant species, which may have implications for disease transmission from enhanced recruitment of salt‐tolerant host species such as mosquitoes. At the ecosystem level, road salts alter nutrient and energy flow. Contaminated wetlands could see greater export of greenhouse gases, streams will probably export more nitrogen and carbon, and lakes will encounter altered hydrology and oxygen dynamics, leading to greater phosphorus release from sediments. While it is necessary to keep roads safe for humans, the costs to freshwater ecosystems may be severe if actions are not taken to mitigate road salt salinisation. Cooperation among policy makers, environmental managers, transportation professionals, scientists, and the public will be crucial to prevent a loss of ecosystem services including water clarity, drinkable water, recreation venues, and fisheries.

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Section: Basal Trophic Levelsmentioning

confidence: 99%

Section: Diatoma Vulgaris Encyonema Caespitosum Pinnularia Microstamentioning

confidence: 99%

A review of the species, community, and ecosystem impacts of road salt salinisation in fresh waters

2019

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“…). Ionome‐wide information is also important when studying the consequences of evolution on the flow of nutrients between organisms and their environment, as the availability, uptake, and utilization of specific macronutrients is often dependent on the dynamics of trace elements (Lind & Jeyasingh ; Liu et al . ).…”

Section: Introductionmentioning

confidence: 99%

“…Increased elemental resolution provides an enhanced ability to identify the axes of ecologically relevant variation among populations, which could be useful in identifying the phenotypic underpinnings of local adaptation (Huang & Salt 2016;Goos et al 2017). Ionome-wide information is also important when studying the consequences of evolution on the flow of nutrients between organisms and their environment, as the availability, uptake, and utilization of specific macronutrients is often dependent on the dynamics of trace elements (Lind & Jeyasingh 2018;Liu et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Ionome and elemental transport kinetics shaped by parallel evolution in threespine stickleback

et al. 2019

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Evidence that organisms evolve rapidly enough to alter ecological dynamics necessitates investigation of the reciprocal links between ecology and evolution. Data that link genotype to phenotype to ecology are needed to understand both the process and ecological consequences of rapid evolution. Here, we quantified the suite of elements in individuals (i.e., ionome) and differences in the fluxes of key nutrients across populations of threespine stickleback. We find that allelic variation associated with freshwater adaptation that controls bony plating is associated with changes in the ionome and nutrient recycling. More broadly, we find that adaptation of marine stickleback to freshwater conditions shifts the ionomes of natural populations and populations raised in common gardens. In both cases ionomic divergence between populations was primarily driven by differences in trace elements rather than elements typically associated with bone. These findings demonstrate the utility of ecological stoichiometry and the importance of ionome‐wide data in understanding eco‐evolutionary dynamics.

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“…3b), a gene family essential for iron metabolism in many organisms 40 . Previous research in Daphnia identified a significant interaction between P-limitation and iron-kinetics 41 . This finding, together with our results suggests a central role of MCOs in modulating essential cellular processes under P-limitation.…”

Section: Resultsmentioning

confidence: 91%

Dissecting the transcriptomic basis of phenotypic evolution in an aquatic keystone grazer

Frisch

Becker

Wojewodzic

2019

Preprint

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26Cultural eutrophication is one of the largest threats to aquatic ecosystems with 27 devastating ecological and economic consequences. Although Daphnia, a keystone 28 grazer crustacean, can mitigate some negative effects of eutrophication in freshwater 29 habitats, it is itself affected by changes in nutrient composition. Previous studies have 30 shown evolutionary adaptation of Daphnia to environmental change, including high 31 phosphorus levels. While phosphorus is an essential macronutrient, it negatively 32affects Daphnia life history when present in excessive concentrations. Here, we map 33 weighted gene co-expression networks to phosphorus-related phenotypic traits in 34 centuries-old ancestral Daphnia and their modern descendants, contrasting pre-and 35 post-eutrophication environments. We find that evolutionary fine-tuning of 36 transcriptional responses is manifested at a basic (cellular) phenotypic level, and is 37 strongly correlated to an evolved plasticity of gene expression. At a higher phenotypic 38 level, this contributes to the maintenance of physiological homeostasis, and a robust 39 preservation of somatic phosphorus concentration. 40 41 3 Introduction 42Cultural eutrophication is one of the largest threats to aquatic ecosystems with 43 devastating ecological and economic effects 1 . Rising phosphorus (P) concentrations in 44 surface water result in high algal biomasses that pose a serious ecological threat to 45 aquatic habitats, impacting biodiversity, drinking water quality, recreational 46 resources, and fisheries 1-2 . One of the major P-sources of eutrophication is the use of 47 phosphate fertilizers, for which the global consumption has increased from 1 to 15 Mt 48 P year -1 in the 20th century 3 . Vital ecosystem services provided by Daphnia, a 49 keystone herbivore crustacean in freshwater habitats, can effectively mitigate some of 50 these negative impacts by decimating phytoplankton biomass 4 . Although P is a vital 51 element for many cellular components, including RNA, DNA and ATP, excessive P-52 concentrations typical of eutrophication can negatively affect somatic and population 53 growth of Daphnia 5-6 . In addition, algal blooms often involve toxin-producing 54 cyanobacteria that can negatively affect the growth rate of Daphnia, although local 55 adaptation to these toxins has been observed 7-9 . Insights from resurrection ecology 10 56 suggest that Daphnia can adapt to changing environmental conditions, such as climate 57 change 11 , anthropogenic stressors 12 , toxic algae 13 , and phosphorus supply 14 . Although 58 previous analyses have examined the functional genome underlying Daphnia 59 phenotypes (e.g. [15][16][17][18][19] ), the link between phenotypic adaptation and the evolution of 60 gene expression reaction norms in this keystone species is poorly understood. 61Adaptation to environmental change has been associated with divergent gene 62 expression patterns 20 and the maintenance or evolution of gene expression reaction 63 norms [21][22] . However, directly linking...

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Interactive effects of dietary phosphorus and iron on Daphnia life history

Cited by 13 publications

References 56 publications

A review of the species, community, and ecosystem impacts of road salt salinisation in fresh waters

A review of the species, community, and ecosystem impacts of road salt salinisation in fresh waters

Ionome and elemental transport kinetics shaped by parallel evolution in threespine stickleback

Dissecting the transcriptomic basis of phenotypic evolution in an aquatic keystone grazer

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