Post-depositional redistribution and gradual accumulation of 137Cs in a riparian wetland ecosystem in Sweden

2006 ◽  
Vol 87 (2) ◽  
pp. 175-187 ◽  
Author(s):  
K. Stark ◽  
P. Wallberg ◽  
T. Nylén
Keyword(s):  
Wetland Ecosystem ◽  
Riparian Wetland ◽  
Gradual Accumulation

scholarly journals Acclimating leaf celery plant (Apium graveolens) via bottom wet culture for increasing its adaptability to tropical riparian wetland ecosystem

2020 ◽  
Vol 22 (1) ◽  
Author(s):  
Benyamin Lakitan ◽  
KARTIKA KARTIKA ◽  
SUSILAWATI SUSILAWATI ◽  
ANDI WIJAYA
Keyword(s):  
Natural Habitat ◽  
Total Yield ◽  
Apium Graveolens ◽  
Potential Candidate ◽  
Wetland Ecosystem ◽  
Estimation Model ◽  
Shallow Water Table ◽  
Riparian Wetland ◽  
Spad Value ◽  
Celery Plant

Abstract. Lakitan B, Kartika, Susilawati, Wijaya A. 2021. Acclimating leaf celery plant (Apium graveolens) via bottom wet culture to increase its adaptability to the tropical riparian wetland ecosystem. Biodiversitas 22: 320-328. Bottom-wet culture was set up for acclimating leaf celery plant prior to cultivation at shallow water table conditions. The aim of this research was to evaluate adaptability of leaf celery plants to riparian wetland ecosystem. Leaf celery was selected as potential candidate since natural habitat of its wild relatives is marshlands. Shading at 0%, 20%, and 60% was applied to reduced tropical sunlight intensity. Results of this study indicated that soil moisture was significantly increased in plants exposed to 60% shading, but leaf SPAD value was not significantly affected. Leaf celery is a perennial vegetable that can be frequently harvested. Weekly harvesting was rewarded with optimum yield and good quality leaves, i.e. high SPAD value (45.73 to 51.89). Delaying harvest to 3 weeks increased total yield but 52.12% of the harvested leaves were non-marketable. Mother plant of leaf celery produced suckers, but number of suckers only moderately correlated with yield (R2 = 0.56). Plants exposed to 60% shading produced significantly less suckers (9.00) than those exposed to full sunlight (12.46) and 20% shading (12.88) Use of zero intercept linear regression model, with length of leaf midrib (LLM) x leaf wingspan (LWS) as predictor, resulted in a geometrically based and accurate leaf area estimation model (LA = 0.3431(LLM x LWS); R2 = 0.87) for compound leaves of leaf celery plant. In conclusion, the most crucial factor in optimizing quantity and quality of yield was weekly harvesting focusing on marketable-size leaves.

Nutrient Transport in a Restored Riparian Wetland

2003 ◽  
Vol 32 (2) ◽  
pp. 711 ◽  
Author(s):  
G. Vellidis ◽  
R. Lowrance ◽  
P. Gay ◽  
R. K. Hubbard
Keyword(s):  
Nutrient Transport ◽  
Riparian Wetland

scholarly journals An Antigenic Thrift-Based Approach to Influenza Vaccine Design

Vaccines ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 657
Author(s):  
Jai S. Bolton ◽  
Hannah Klim ◽  
Judith Wellens ◽  
Matthew Edmans ◽  
Uri Obolski ◽  
...  
Keyword(s):  
Influenza Vaccine ◽  
Influenza Season ◽  
Vaccine Design ◽  
Antigenic Drift ◽  
Influenza Vaccines ◽  
Immune Protection ◽  
Immune Selection ◽  
Drift Theory ◽  
Gradual Accumulation ◽  
Additional Constraints

The antigenic drift theory states that influenza evolves via the gradual accumulation of mutations, decreasing a host’s immune protection against previous strains. Influenza vaccines are designed accordingly, under the premise of antigenic drift. However, a paradox exists at the centre of influenza research. If influenza evolved primarily through mutation in multiple epitopes, multiple influenza strains should co-circulate. Such a multitude of strains would render influenza vaccines quickly inefficacious. Instead, a single or limited number of strains dominate circulation each influenza season. Unless additional constraints are placed on the evolution of influenza, antigenic drift does not adequately explain these observations. Here, we explore the constraints placed on antigenic drift and a competing theory of influenza evolution – antigenic thrift. In contrast to antigenic drift, antigenic thrift states that immune selection targets epitopes of limited variability, which constrain the variability of the virus. We explain the implications of antigenic drift and antigenic thrift and explore their current and potential uses in the context of influenza vaccine design.

Antioxidant response to oxidative stress in zooplankton thrived in wastewater-fed ponds in East Calcutta Wetland Ecosystem, a Ramsar site

2013 ◽  
Vol 95 (4) ◽  
pp. 627-634 ◽  
Author(s):  
Abhishek Roy Goswami ◽  
Anulipi Aich ◽  
Sudin Pal ◽  
Buddhadeb Chattopadhyay ◽  
Siddhartha Datta ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Antioxidant Response ◽  
Ramsar Site ◽  
Wetland Ecosystem

Geoelectrical Monitoring of Complex Hydrological Processes in a Riparian Wetland

2015 ◽  
Author(s):  
S.S. Uhlemann* ◽  
J.P.R. Sorensen ◽  
J.E. Chambers ◽  
P.B. Wilkinson ◽  
D.C. Gooddy
Keyword(s):  
Hydrological Processes ◽  
Riparian Wetland

scholarly journals More than redox, biological organic ligands control iron isotope fractionation in the riparian wetland

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Elaheh Lotfi-Kalahroodi ◽  
Anne-Catherine Pierson-Wickmann ◽  
Olivier Rouxel ◽  
Rémi Marsac ◽  
Martine Bouhnik-Le Coz ◽  
...  
Keyword(s):  
Redox Reactions ◽  
Isotope Fractionation ◽  
Isotopic Fractionation ◽  
Isotopic Signature ◽  
Organic Ligands ◽  
Riparian Wetland ◽  
Fe Isotopes ◽  
Preferential Binding ◽  
Isotope Systematics

AbstractAlthough redox reactions are recognized to fractionate iron (Fe) isotopes, the dominant mechanisms controlling the Fe isotope fractionation and notably the role of organic matter (OM) are still debated. Here, we demonstrate how binding to organic ligands governs Fe isotope fractionation beyond that arising from redox reactions. The reductive biodissolution of soil Fe(III) enriched the solution in light Fe isotopes, whereas, with the extended reduction, the preferential binding of heavy Fe isotopes to large biological organic ligands enriched the solution in heavy Fe isotopes. Under oxic conditions, the aggregation/sedimentation of Fe(III) nano-oxides with OM resulted in an initial enrichment of the solution in light Fe isotopes. However, heavy Fe isotopes progressively dominate the solution composition in response to their binding with large biologically-derived organic ligands. Confronted with field data, these results demonstrate that Fe isotope systematics in wetlands are controlled by the OM flux, masking Fe isotope fractionation arising from redox reactions. This work sheds light on an overseen aspect of Fe isotopic fractionation and calls for a reevaluation of the parameters controlling the Fe isotopes fractionation to clarify the interpretation of the Fe isotopic signature.

scholarly journals Lake and wetland ecosystem services measuring water storage and local climate regulation

2017 ◽  
Vol 53 (4) ◽  
pp. 3197-3223 ◽  
Author(s):  
Christina P. Wong ◽  
Bo Jiang ◽  
Theodore J. Bohn ◽  
Kai N. Lee ◽  
Dennis P. Lettenmaier ◽  
...  
Keyword(s):  
Ecosystem Services ◽  
Water Storage ◽  
Wetland Ecosystem ◽  
Local Climate ◽  
Climate Regulation
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