Photosynthesis and photorespiration in freshwater organisms: Amphibious plants

1989 ◽  
Vol 34 (1-3) ◽  
pp. 267-286 ◽  
Author(s):  
S.C. Maberly ◽  
D.H.N. Spence
Keyword(s):  
Freshwater Organisms ◽  
Amphibious Plants

The Biology of Lakes and Ponds

2017 ◽  
Author(s):  
Christer Brönmark ◽  
Lars-Anders Hansson
Keyword(s):  
Evolutionary Ecology ◽  
Global Climate ◽  
Biodiversity Loss ◽  
Environmental Threats ◽  
Freshwater Organisms ◽  
Abiotic Constraints ◽  
Abiotic And Biotic Factors ◽  
The Individual ◽  
Degraded Ecosystems ◽  
Behavioural Adaptations

The Biology of Lakes and Ponds focuses on the interactions between the abiotic frame, such as turbulence, temperature, pH and nutrients, and the organisms, including interactions with and among organisms at the individual, population and community level. The book fills this niche between traditional limnology and evolutionary ecology by focusing on physiological, morphological and behavioural adaptations among organisms to abiotic and biotic factors and how interactions between biotic processes and abiotic constraints determine the structure and dynamics of lake and pond systems. In addition, the book describes and analyses the causes and consequences of human activities on freshwater organisms and ecosystems and covers longstanding environmental threats, such as eutrophication and acidification, as well as novel threats, such as biodiversity loss, use of everyday chemicals and global climate change. However, also signs of improvement and the possibilities to restore degraded ecosystems are discussed and provide hope for future generations.

Acute toxicity of piggery effluent and veterinary pharmaceutical cocktail on freshwater organisms

2021 ◽  
Vol 193 (5) ◽  
Author(s):  
Angela C. Udebuani ◽  
Omoniyi Pereao ◽  
Michael O. Akharame ◽  
Olalekan S. Fatoki ◽  
Beatrice O. Opeolu
Keyword(s):  
Acute Toxicity ◽  
Freshwater Organisms ◽  
Veterinary Pharmaceutical

Effects of pollutants on freshwater organisms

1998 ◽  
Vol 70 (4) ◽  
pp. 921-931 ◽  
Author(s):  
David R. Beeson ◽  
Mark C. Lewis ◽  
Jerald M. Powell ◽  
Delwayne R. Nimmo
Keyword(s):  
Freshwater Organisms

scholarly journals Updated checklist of aquatic macrophytes from Northern Brazil

2015 ◽  
Vol 45 (2) ◽  
pp. 111-132 ◽  
Author(s):  
Edson Gomes de MOURA JÚNIOR ◽  
Raíssa Maria Sampaio de PAIVA ◽  
Angélica Cândida FERREIRA ◽  
Lucília Dias PACOPAHYBA ◽  
Aldaléa Sprada TAVARES ◽  
...  
Keyword(s):  
Aquatic Macrophytes ◽  
Floristic Similarity ◽  
Field Collection ◽  
Biogeographic Patterns ◽  
Total Species Richness ◽  
Amphibious Plants ◽  
Aquatic Flora ◽  
Bibliographic Search ◽  
Northern Brazil ◽  
Total Species

Field collection and herbaria data did not allow to quantify the diversity of aquatic plants from Northern Brazil, so we could not detect biogeographic patterns. Therefore, our objectives were to identify and quantify the aquatic macrophytes of North Brazilian states, analyzing herbaria data plataforms (SpeciesLink and Flora do Brasil). The checklist was produced by bibliographic search (articles published between 1980 and 2000), herbaria collections of the platforms SpeciesLink and Flora do Brasil and field expeditions, where we utilized asystematic sampling. We also analyzed the floristic similarity of aquatic macrophytes among Northern Brazil, wetlands of distinct Brazilian regions and the Neotropics. We recorded 539 species, of which 48 are endemic to Brazil. The states with highest number of species were Amazonas and Pará, independently on platform. The most represented families were Poaceae (89 species), Podostemaceae (55), Cyperaceae (50) and Fabaceae (47). We highlight the unprecedent richness of Podostemaceae, due to our own field collection efforts on favorable habitats, 25 species being endemic. Emergent and/or amphibious plants (515) were dominant in total species richness and were best represented in lotic habitats. We found significant differences in richness and floristics among states, obtained from the platforms. There is floristic similarity among Northern states and other Brazilian wetlands. In conclusion, we observed a rich aquatic flora in Northern Brazil, in spite of scarcity of records for Acre, Rondonia and Tocantins; we highlight the unprecedent number of endemic species of Podostemaceae (25) and contrasting richness between SpeciesLink and Flora do Brasil.

scholarly journals Predicting current and future background ion concentrations in German surface water under climate change

2018 ◽  
Vol 374 (1764) ◽  
pp. 20180004 ◽  
Author(s):  
Trong Dieu Hien Le ◽  
Mira Kattwinkel ◽  
Klaus Schützenmeister ◽  
John R. Olson ◽  
Charles P. Hawkins ◽  
...  
Keyword(s):  
Climate Change ◽  
Surface Waters ◽  
Anthropogenic Activities ◽  
Global Environmental Change ◽  
Running Water ◽  
Ion Concentrations ◽  
Freshwater Organisms ◽  
Global Environmental Issue ◽  
Global Environmental ◽  
Major Factors

Salinization of surface waters is a global environmental issue that can pose a regional risk to freshwater organisms, potentially leading to high environmental and economic costs. Global environmental change including climate and land use change can increase the transport of ions into surface waters. We fit both multiple linear regression (LR) and random forest (RF) models on a large spatial dataset to predict Ca 2+ (266 sites), Mg 2+ (266 sites), and (357 sites) ion concentrations as well as electrical conductivity (EC—a proxy for total dissolved solids with 410 sites) in German running water bodies. Predictions in both types of models were driven by the major factors controlling salinity including geologic and soil properties, climate, vegetation and topography. The predictive power of the two types of models was very similar, with RF explaining 71–76% of the spatial variation in ion concentrations and LR explaining 70–75% of the variance. Mean squared errors for predictions were all smaller than 0.06. The factors most strongly associated with stream ion concentrations varied among models but rock chemistry and climate were the most dominant. The RF model was subsequently used to forecast the changes in EC that were likely to occur for the period of 2070 to 2100 in response to just climate change—i.e. no additional effects of other anthropogenic activities. The future forecasting shows approximately 10% and 15% increases in mean EC for representative concentration pathways 2.6 and 8.5 (RCP2.6 and RCP8.5) scenarios, respectively. This article is part of the theme issue ‘Salt in freshwaters: causes, ecological consequences and future prospects’.

A Statistical Model to Predict Toxicity of Saline Produced Waters to Freshwater Organisms

1992 ◽  
pp. 89-96 ◽  
Author(s):  
D. D. Gulley ◽  
D. R. Mount ◽  
J. R. Hockett ◽  
H. L. Bergman
Keyword(s):  
Statistical Model ◽  
Freshwater Organisms ◽  
Produced Waters

scholarly journals Supporting the development of scientific understanding when constructing an evolving explanation

2022 ◽  
Vol 4 (1) ◽  
Author(s):  
Ann M. Novak ◽  
David F. Treagust
Keyword(s):  
Scientific Explanation ◽  
Project Based Learning ◽  
Incremental Development ◽  
Freshwater Organisms ◽  
Freshwater System ◽  
New Evidence ◽  
Scientific Ideas ◽  
Over Time

AbstractWe explore how students developed an integrated understanding of scientific ideas and how they applied their understandings in new situations. We examine the incremental development of 7th grade students’ scientific ideas across four iterations of a scientific explanation related to a freshwater system. We demonstrate that knowing how to make use of scientific ideas to explain phenomena needs to be learned just as developing integrated understanding of scientific ideas needs to be learned. Students participated in an open-ended, long-term project-based learning unit, constructing one explanation over time to address, “How healthy is our stream for freshwater organisms and how do our actions on land potentially impact the water quality of the stream?” The explanation developed over several weeks as new data were collected and analyzed. Students discussed evidence by revisiting scientific ideas and including new scientific ideas. This research investigates two questions: (1) As students engage in writing a scientific explanation over time, to what extent do they develop integrated understanding of appropriate scientific ideas? and (2) When writing about new evidence, do these earlier experiences of writing explanations enable students to make use of new scientific ideas in more sophisticated ways? In other words, do earlier experiences allow students to know how to make use of their ideas in these new situations? The results indicated statistically significant effects. Through various iterations of the explanation students included richer discussion using appropriate scientific ideas. Students were also able to make better use of new knowledge in new situations.

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