Towards bio-inspired polymer adhesives: Activation assisted via HOBt for grafting of dopamine onto poly(acrylic acid)Erik Alberts, Payagala Fernando, Travis Thornell, Hannah George, Ashlyn M. Koval, Manoj K. Shukla, Charles Weiss & Lee Moores
The design of bio-inspired polymers has long been an area of intense study, however applications to the design of concrete admixtures for improved materials performance have been relatively unexplored. In this work we functionalized poly(acrylic acid) (PAA), a simple analogue to polycarboxylate ether admixtures in concrete, with dopamine to form a catechol-bearing polymer (PAA-g-DA). Synthetic routes utilizing hydroxybenzotriazole (HOBt) as an activating agent were examined for their ability in grafting dopamine to the PAA backbone....
Louisiana’s coastal marshes are becoming increasingly fragmented due to sea level rise, subsidence, reduced sediment inflow from the Mississippi River, and saltwater intrusion. Many commercially and recreationally fished species rely on the marsh system as nursery habitat, and the resilience of species to further marsh loss and marsh fragmentation is uncertain. We examined the impacts of marsh fragmentation on the blue crab, Callinectes sapidus, a species supporting one of the largest fisheries in coastal Louisiana,...
Data from: Lodato et al. (2021) Functional importance and diversity of fungi during standing grass litter decompositionKevin Kuehn
Although microbial participation in litter decomposition is widely known within terrestrial soils, the role and significance of microorganisms during the aerial standing litter phase of decomposition remains poorly investigated. We examined the fungi inhabiting standing leaf litter of Schizachyrium scoparium and Schizachyrium tenerum in a Longleaf Pine savanna ecosystem and estimated their contribution to litter decomposition. We identified fungal phylotypes associated with leaf litter and quantified leaf C mass loss, fungal biomass production, and microbial...
Data from: A literature synthesis resolves litter intrinsic constraints on fungal dynamics and decomposition across standing dead macrophytesTori Hebert, Halvor Halvorson & Kevin Kuehn
The standing dead phase is an important stage in the decomposition of emergent vegetation in marsh wetlands, yet few studies have examined how intrinsic litter traits constrain rates of standing litter decomposition or fungal colonization across plant tissue types or species. To address broad constraints on the decomposition of standing dead litter, we conducted a systematic survey of emergent standing dead decomposition studies that measured decay rates and/or fungal biomass, and litter % lignin, carbon:nitrogen...
Sharks are a diverse group of mobile predators that forage across varied spatial scales and have the potential to influence food web dynamics. The ecological consequences of recent declines in shark biomass may extend across broader geographic ranges if shark taxa display common behavioural traits. By tracking the original site of photosynthetic fixation of carbon atoms that were ultimately assimilated into muscle tissues of 5,394 sharks from 114 species, we identify globally consistent biogeographic traits...
Data from: Resource constraints highlight complex microbial interactions during lake biofilm developmentKevin H. Wyatt, Rody C. Seballos, Maria N. Shoemaker, Shawn P. Brown, Sudeep Chandra, Kevin A. Kuehn, Allison R. Rober & Steven Sadro
Abstract 1. This study evaluated how the availability of nutrients and organic carbon interact to influence the associations between autotrophic and heterotrophic microorganisms during lake biofilm development. Considering that decomposers are often better competitors for nutrients than producers in aquatic environments, we hypothesized that heterotrophs would outcompete autotrophs for available nutrients unless heterotrophs were limited by organic carbon provided by autotrophs. 2. To test our hypothesis, we evaluated autotrophic (algae) and heterotrophic (fungi, bacteria) biomass...
Data from: Periphytic algae decouple fungal activity from leaf litter decomposition via negative primingHalvor M. Halvorson, Jacob R. Barry, Matthew B. Lodato, Robert H. Findlay, Steven N. Francoeur & Kevin A. Kuehn
1. Well-documented in terrestrial settings, priming effects describe stimulated heterotrophic microbial activity and decomposition of recalcitrant carbon by additions of labile carbon. In aquatic settings, algae produce labile exudates which may elicit priming during organic matter decomposition, yet the directions and mechanisms of aquatic priming effects remain poorly tested. 2. We tested algal-induced priming during decomposition of two leaf species of contrasting recalcitrance, Liriodendron tulipifera and Quercus nigra, in experimental streams under light or dark...
Data from: How diverse detrital environments influence nutrient stoichiometry between males and females of the co-occurring container mosquitoes Aedes albopictus, Ae. aegypti, and Culex quinquefasciatusDonald A. Yee, Michael G. Kaufman & Nnaemeka F. Ezeakacha
Allocation patterns of carbon and nitrogen in animals are influenced by food quality and quantity, as well as by inherent metabolic and physiological constraints within organisms. Whole body stoichiometry also may vary between the sexes who differ in development rates and reproductive allocation patterns. In aquatic containers, such as tree holes and tires, detrital inputs, which vary in amounts of carbon and nitrogen, form the basis of the mosquito-dominated food web. Differences in development times...
Data from: The role of temperature in affecting carry-over effects and larval competition in the globally invasive mosquito, Aedes albopictusNnaemeka F. Ezeakacha & Donald. A. Yee
Background: Ectotherms, like mosquitoes, have evolved specific responses to variation in environmental conditions like temperature, and these responses could confer a fitness benefit or cost when carried-over to different life stages. However, effects of temperature on animals with complex life-cycles often only focus on part of their life-cycle, or only consider how single aspects of life-history may carry over to new stages. Herein we investigated how temperature affects intraspecific larval competition and carry-over effects from...
University of Southern Mississippi34
Fisheries and Oceans Canada3
University of Massachusetts Amherst2
Spanish Institute of Oceanography2
University of California System2
University of Georgia2
Texas A&M University2
Portuguese Sea and Atmosphere Institute2
Southwest Fisheries Science Center2