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A Dam Passage Performance Standard Model For American Shad, Daniel S. Stich, Timothy F. Sheehan, Joseph D. Zydlewski Jul 2018

A Dam Passage Performance Standard Model For American Shad, Daniel S. Stich, Timothy F. Sheehan, Joseph D. Zydlewski

New Hampshire EPSCoR

Objectives for recovery of alosines commonly involve improving fish passage at dams during migration. However, a quantitative basis for dam passage performance standards is largely absent. We describe development of a stochastic life-history-based simulation model for American shad, Alosa sapidissima, to estimate effects of dam passage and migratory delay on abundance, spatial distribution of spawning adults, and demographic structuring in space and time. We used the Penobscot River, Maine, USA, as a case study to examine sensitivity of modeled population metrics and probability of achieving specific management goals to inputs. Spawner abundance and percentage of repeat spawners were most sensitive …


Responses Of Non-Native Earthworms To Experimental Eradication Of Garlic Mustard And Implications For Native Vegetation, Kristina A. Stinson, Serita D. Frey, M. R. Jackson, E. Coates-Connor, Mark A. Anthony, K. Martinez Jul 2018

Responses Of Non-Native Earthworms To Experimental Eradication Of Garlic Mustard And Implications For Native Vegetation, Kristina A. Stinson, Serita D. Frey, M. R. Jackson, E. Coates-Connor, Mark A. Anthony, K. Martinez

Faculty Publications

Recent studies in invasion biology suggest that positive feedback among two or more introduced organisms facilitate establishment within a new range and drive changes in native plant communities. Here, we experimentally tested for relationships between native plants and two non-native organisms invading forest habitats in North America: garlic mustard (Alliaria petiolata, Brassicaceae) and earthworms. In two forested sites, we compared understory vegetation and earthworm biomass in plots where garlic mustard was removed for three years, plots without garlic mustard invasion, and plots invaded by garlic mustard that was not removed. Earthworm biomass was highest in the plots with garlic mustard, …


Human Activities Accelerated The Degradation Of Saline Seepweed Red Beaches By Amplifying Top‐Down And Bottom‐Up Forces, Weizhi Lu, Jingfeng Xiao, Wei Lei, Jinqiu Du, Zhengjie Li, Pifu Cong, Wenhao Hou, Jialin Zhang, Luzhen Chen, Yihui Zhang, Guoxiang Liao Jul 2018

Human Activities Accelerated The Degradation Of Saline Seepweed Red Beaches By Amplifying Top‐Down And Bottom‐Up Forces, Weizhi Lu, Jingfeng Xiao, Wei Lei, Jinqiu Du, Zhengjie Li, Pifu Cong, Wenhao Hou, Jialin Zhang, Luzhen Chen, Yihui Zhang, Guoxiang Liao

Faculty Publications

Salt marshes dominated by saline seepweed (Suaeda heteroptera) provide important ecosystem services such as sequestering carbon (blue carbon), maintaining healthy fisheries, and protecting shorelines. These salt marshes also constitute stunning red beach landscapes, and the resulting tourism significantly contributes to the local economy. However, land use change and degradation have led to a substantial loss of the red beach area. It remains unclear how human activities influence the top‐down and bottom‐up forces that regulate the distribution and succession of these salt marshes and lead to the degradation of the red beaches. We examined how bottom‐up forces influenced the germination, emergence, …


Sediment Characteristics And Methane Ebullition In Three Subarctic Lakes, Martin Wik, Joel E. Johnson, Patrick M. Crill, Joel P. Destasio, Lance Erickson, Madison J. Halloran, Maria Florencia Fahnestock, Maurice K. Crawford, Stephen C. Phillips, Ruth K. Varner Jul 2018

Sediment Characteristics And Methane Ebullition In Three Subarctic Lakes, Martin Wik, Joel E. Johnson, Patrick M. Crill, Joel P. Destasio, Lance Erickson, Madison J. Halloran, Maria Florencia Fahnestock, Maurice K. Crawford, Stephen C. Phillips, Ruth K. Varner

Faculty Publications

Ebullition (bubbling) from climate‐sensitive northern lakes remains an unconstrained source of atmospheric methane (CH4). Although the focus of many recent studies, ebullition is rarely linked to the physical characteristics of lakes. In this study we analyze the sediments of subarctic postglacial lakes and investigate how sediment properties relate to the large spatial variation in CH4 bubble flux, quantified over multiple years using bubble traps. The results show that the sediments from our lakes are rich in total organic carbon, containing 37 kg/m3 on average. This number is roughly 40% higher than the average for yedoma deposits, which have been identified …


Litter Identity Affects Assimilation Of Carbon And Nitrogen By A Shredding Caddisfly, Adam C. Siders, Zacchaeus G. Compson, Bruce A. Hungate, Paul Dijkstra, George W. Koch, Adam S. Wymore, A. Stuart Grandy, Jane C. Marks Jul 2018

Litter Identity Affects Assimilation Of Carbon And Nitrogen By A Shredding Caddisfly, Adam C. Siders, Zacchaeus G. Compson, Bruce A. Hungate, Paul Dijkstra, George W. Koch, Adam S. Wymore, A. Stuart Grandy, Jane C. Marks

Faculty Publications

Ecologists often equate litter quality with decomposition rate. In soil and sediments, litter that is rapidly decomposed by microbes often has low concentrations of tannin and lignin and low C:N ratios. Do these same traits also favor element transfer to higher trophic levels in streams, where many insects depend on litter as their primary food source? We test the hypothesis that slow decomposition rates promote element transfer from litter to insects, whereas rapid decomposition favors microbes. We measured carbon and nitrogen fluxes from four plant species to a leaf-shredding caddisfly using isotopically labeled litter. Caddisflies assimilated a higher percentage of …


New Grant Will Fund Study Of Hagfish Slime, Sarah Schaier Jul 2018

New Grant Will Fund Study Of Hagfish Slime, Sarah Schaier

UNH Today Archive

No abstract provided.


Meet Your Pals Series: Mamady Sankoh '21, Kassidy Taylor Jul 2018

Meet Your Pals Series: Mamady Sankoh '21, Kassidy Taylor

UNH Today Archive

No abstract provided.


Biotechnology Program Revamps Course, Equipment Aligned With Armi, Unh Communications And Public Affairs Jun 2018

Biotechnology Program Revamps Course, Equipment Aligned With Armi, Unh Communications And Public Affairs

UNH Today Archive

No abstract provided.


Unh Bee Lab Hosts New England Bee Bioblitz In Cheshire County June 22-24, Lori Tyler Gula Jun 2018

Unh Bee Lab Hosts New England Bee Bioblitz In Cheshire County June 22-24, Lori Tyler Gula

Media Relations

No abstract provided.


Unh Researchers Shine A Light On More Accurate Way To Estimate Land-Based Photosynthesis, Rebecca Irelan Jun 2018

Unh Researchers Shine A Light On More Accurate Way To Estimate Land-Based Photosynthesis, Rebecca Irelan

UNH Today Archive

No abstract provided.


Unh Researchers Shine A Light On More Accurate Way To Estimate Climate Change, Robbin Ray Jun 2018

Unh Researchers Shine A Light On More Accurate Way To Estimate Climate Change, Robbin Ray

Media Relations

No abstract provided.


Meet Your Milk At Unh Open Barn June 23, Lori Tyler Gula Jun 2018

Meet Your Milk At Unh Open Barn June 23, Lori Tyler Gula

Media Relations

No abstract provided.


Determining The Effectiveness Of The Clean Air Act And Amendments For The Recovery Of Surface Waters In The Northeastern U.S., Nh Wrrc, University Of New Hampshire Jun 2018

Determining The Effectiveness Of The Clean Air Act And Amendments For The Recovery Of Surface Waters In The Northeastern U.S., Nh Wrrc, University Of New Hampshire

NH Water Resources Research Center Scholarship

No abstract provided.


New Hampshire Wrrc Information Transfer, William H. Mcdowell Jun 2018

New Hampshire Wrrc Information Transfer, William H. Mcdowell

NH Water Resources Research Center Scholarship

No abstract provided.


Salt And Streams: Assessing Ecological Stress In New Hampshire Watersheds At Community, Population, And Molecular Levels, Amy Marie Villamagna Jun 2018

Salt And Streams: Assessing Ecological Stress In New Hampshire Watersheds At Community, Population, And Molecular Levels, Amy Marie Villamagna

NH Water Resources Research Center Scholarship

No abstract provided.


Water Quality And The Landscape: Long-Term Monitoring Of Rapidly Developing Suburban Watersheds, William H. Mcdowell, Michelle Daley Shattuck Jun 2018

Water Quality And The Landscape: Long-Term Monitoring Of Rapidly Developing Suburban Watersheds, William H. Mcdowell, Michelle Daley Shattuck

NH Water Resources Research Center Scholarship

No abstract provided.


Ecosystem Indicators For Freshwater Streams, Alison Watts Jun 2018

Ecosystem Indicators For Freshwater Streams, Alison Watts

NH Water Resources Research Center Scholarship

No abstract provided.


Temporal Dynamics Of Halogenated Organic Compounds In Marcellus Shale Flowback, Jenna L. Luek, Mourad Harir, Philippe Schmitt-Kopplin, Paula J. Mouser, Michael Gonsior Jun 2018

Temporal Dynamics Of Halogenated Organic Compounds In Marcellus Shale Flowback, Jenna L. Luek, Mourad Harir, Philippe Schmitt-Kopplin, Paula J. Mouser, Michael Gonsior

Civil & Environmental Engineering

The chemistry of hydraulic fracturing fluids and wastewaters is complex and is known to vary by operator, geologic formation, and fluid age. A time series of hydraulic fracturing fluids, flowback fluids, and produced waters was collected from two adjacent Marcellus Shale gas wells for organic chemical composition analyses using ultrahigh resolution mass spectrometry. Hierarchical clustering was used to compare and extract ions related to different fluid ages and many halogenated organic molecular ions were identified in flowback fluids and early produced waters based on exact mass. Iodinated organic compounds were the dominant halogen class in these clusters and were nearly …


Hot And Salty: Assessing Ecological Stress In New Hampshire Streams At Community, Population, And Molecular Levels, Amy Marie Villamagna Jun 2018

Hot And Salty: Assessing Ecological Stress In New Hampshire Streams At Community, Population, And Molecular Levels, Amy Marie Villamagna

NH Water Resources Research Center Scholarship

No abstract provided.


In The News: Daniel Seichepine Talks Heroin's Effects On Brain On Wmur, Unh Communications And Public Affairs May 2018

In The News: Daniel Seichepine Talks Heroin's Effects On Brain On Wmur, Unh Communications And Public Affairs

UNH Today Archive

No abstract provided.


In The News: Daniel Seichepine Talks Heroin's Effects On Brain On Wmur, Unh Communications And Public Affairs May 2018

In The News: Daniel Seichepine Talks Heroin's Effects On Brain On Wmur, Unh Communications And Public Affairs

UNH Today Archive

No abstract provided.


Passing: Professor Emeritus William Condon, Unh Communications And Public Affairs May 2018

Passing: Professor Emeritus William Condon, Unh Communications And Public Affairs

UNH Today Archive

No abstract provided.


Research Into The Future, Jennifer Saunders May 2018

Research Into The Future, Jennifer Saunders

UNH Today Archive

No abstract provided.


Ready For What's Next, Unh Communications And Public Affairs May 2018

Ready For What's Next, Unh Communications And Public Affairs

UNH Today Archive

No abstract provided.


Unh Researchers Find Invasive Seaweed Makes Fish Change Their Behavior, Robbin Ray May 2018

Unh Researchers Find Invasive Seaweed Makes Fish Change Their Behavior, Robbin Ray

Media Relations

No abstract provided.


Nowhere To Hide, Beth Potier May 2018

Nowhere To Hide, Beth Potier

UNH Today Archive

No abstract provided.


“Your Education Is A Tool, Not A Weapon.”, Kassidy Taylor May 2018

“Your Education Is A Tool, Not A Weapon.”, Kassidy Taylor

UNH Today Archive

No abstract provided.


One Summer, Seven Scholarships, Jennifer Saunders May 2018

One Summer, Seven Scholarships, Jennifer Saunders

UNH Today Archive

No abstract provided.


Unh Manchester To Celebrate 274 Graduates At May 17th Commencement Ceremony, Kassidy Taylor May 2018

Unh Manchester To Celebrate 274 Graduates At May 17th Commencement Ceremony, Kassidy Taylor

UNH Today Archive

No abstract provided.


From Sharks To Cyanotoxins, Jody Record May 2018

From Sharks To Cyanotoxins, Jody Record

UNH Today Archive

No abstract provided.