Jessica Renee Zehnpfennig- Doctor of Philosophy
- PostDoc Position at Smithsonian Institution
Jessica Renee Zehnpfennig
- Doctor of Philosophy
- PostDoc Position at Smithsonian Institution
About
11
Publications
1,652
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
67
Citations
Introduction
Current institution
Additional affiliations
May 2019 - August 2020
Cooperative Insitute of Great Lakes Research
Position
- Fellow
Description
- Worked as a summer fellow on the project “Fate of the heavy metal manganese during hypoxic events in Lake Erie”. Worked in the field and lab and conducted multiple experiments to determine how manganese is oxidized in freshwater lakes.
Education
May 2020 - June 2024
August 2018 - May 2020
August 2012 - May 2017
Publications
Publications (11)
Manganese (Mn), an element sensitive to redox conditions in aquatic environments, plays a role in numerous biogeochemical cycles. Although the speciation of Mn in lakes largely tracks the availability of dissolved oxygen, direct oxidation of Mn by molecular oxygen occurs slowly and, instead, the majority of Mn oxidation occurs via biotic and abioti...
Citation: Jerde, C.L.; Mahon, A.R.; Campbell, T.; McElroy, M.E.; Pin, K.; Childress, J.N.; Armstrong, M.N.; Zehnpfennig, J.R.; Kelson, S.J.; Koning, A.A.; et al. Are Genetic Reference Libraries Sufficient for Environmental DNA Metabarcoding of Mekong River Basin Fish? Water
The impacts of climate change in polar regions, like Antarctica, have the potential to alter numerous ecosystems and biogeochemical cycles. Increasing temperature and freshwater runoff from melting ice can have profound impacts on the cycling of organic and inorganic nutrients between the pelagic and benthic ecosystems.
![Heatmap showing gene expression [ln(TPM)] for genes associated with...](publication/358311399/figure/fig2/AS:11431281239856485@1714519057600/Heatmap-showing-gene-expression-lnTPM-for-genes-associated-with-carbon-fixation_Q320.jpg)
Microbial community dynamics are influenced not only by biological but also physical and chemical phenomena (e.g., temperature, sunlight, pH, wave energy) that vary on both short and long-time scales. In this study, samples of continental shelf waters of the northwest Atlantic Ocean were periodically collected from pre-sunrise to post-sunset and at...
Pycnogonida, or sea spiders, is a speciose clade with over 1300 described species that is especially diverse in the Southern Ocean. Evolutionary patterns within sea spiders remain unresolved between and within the eleven putative, extant families due to shared morphological traits and highly reduced forms. A consensus phylogeny of recognized famili...
Antarctica, one of the most rapidly changing places on the planet due to global climate change, hosts an impressive diversity of marine fauna. Previous efforts have recognized 23 ecoregions around the Antarctic. However, most of our understanding of the Southern Ocean’s benthic communities is based on more accessible regions (e.g. Antarctic Peninsu...
The Antarctic benthos is rich in biodiversity, with many species being endemic to the Southern Ocean. Multiple factors such as oceanic currents, glacial cycles and reproductive life stages have been attributed to the distribution of benthic dwelling invertebrates around the continent. The sea spider (Pycnogonida) Nymphon australe is a paternal broo...
While originally intending to explore the venom gland microbiome of the desert hairy scorpion Hadrurus arizonensis Ewing, 1928, nanopore sequencing serendipitously recovered complete mitochondrial genomes for this iconic arachnid. Phylogenetic analysis of these high-quality genomes places Hadrurus as sister to Uroctonus, in agreement with some phyl...
Here we present Austropallene halanychi sp. nov., a new species of pycnogonid within the family Callipallenidae (Pycnogonida), collected from the Ross Sea, Antarctica. While retaining key morphological features known for the genus Austropallene Hodg-son, 1915a, the new species is distinguished from congeners by its much larger size, along with the...
Environmental DNA (eDNA) metabarcoding approaches to surveillance have great potential for advancing biodiversity monitoring and fisheries management. For eDNA metabarcoding, having a genetic reference sequence identified to fish species is vital to reduce detection errors. Detection errors will increase when there is no reference sequence for a sp...
