Climate Research and Development Program

Publications

Listed here are the most recent publications, reports and articles by the Climate R&D program.

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Filter Total Items: 674
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Year Published: 2020

Life at the frozen limit: Microbial carbon metabolism across a Late Pleistocene permafrost chronosequence

Permafrost is an extreme habitat yet it hosts microbial populations that remain active over millennia. Using permafrost collected from a Pleistocene chronosequence (19 to 33 ka), we hypothesized that the functional genetic potential of microbial communities in permafrost would reflect microbial strategies to metabolize permafrost soluble organic...

Leewis, Mary-Cathrine; Berlemont, Renaud; Podgorski, David C.; Srinivas, Archana; Zito, Phoebe; Spencer, Robert G. M.; McFarland, Jack; Douglas, Thomas A.; Conaway, Christopher H.; Waldrop, Mark; Mackelprang, Rachel

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Year Published: 2020

Seasonal and individual event-responsiveness are key determinants of carbon exchange across plant functional types

Differentiation in physiological activity is a critical component of resource partitioning in resource-limited environments. For example, it is crucial to understand how plant physiological performance varies through time for different functional groups to forecast how terrestrial ecosystems will respond to change. Here, we tracked the seasonal...

Winkler, Daniel E.; Belnap, Jayne; Duniway, Michael C.; Hoover, David; Reed, Sasha; Yokum, Hannah; Gill, Richard

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Year Published: 2020

Application of empirical land-cover changes to construct climate change scenarios in federally managed lands

Sagebrush-dominant ecosystems in the western United States are highly vulnerable to climatic variability. To understand how these ecosystems will respond under potential future conditions, we correlated changes in National Land Cover Dataset “Back-in-Time” fractional cover maps from 1985-2018 with Daymet climate data in three federally managed...

Soulard, Christopher E.; Rigge, Matthew B.

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Year Published: 2020

Influence of soil microbiota on Taxodium distichum seedling performance during extreme flooding events

Plant associations with soil microbiota can modulate tree seedling growth and survival via mutualistic or antagonistic interactions. It is uncertain, however, whether soil microbiota influence seedling growth of coastal trees when exposed to extreme flooding regimes. We evaluated the role of soil microbes in promoting baldcypress (Taxodium...

Torres-Martínez, Lorena; Sánchez-Julia, Mareli; Kimbrough, Elizabeth; Hendrix, Trey; Hendrix, Miranda; Day, Richard H.; Krauss, Ken W.; Van Bael, Sunshine A

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Year Published: 2020

Salinity, water level, and forest structure contribute to baldcypress (Taxodium distichum) rhizosphere and endosphere community structure

As rising sea levels alter coastal ecosystems, there is a pressing need to examine the effects of saltwater intrusion on coastal communities. Using 16S Illumina profiling, we characterized the communities of baldcypress tree (Taxodium distichum) root endosphere and rhizosphere soil bacteria. Our study utilized established sites along salinity and...

Lumibao, Candice Y; Kimbrough, Elizabeth; Formel, Steven; Day, Richard; From, Andrew; Conner, William H.; Krauss, Ken; Van Bael, Sunshine A

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Year Published: 2020

Nutrients and warming interact to force mountain lakes into unprecedented ecological state

While deposition of reactive nitrogen (N) in the 20th century has been strongly linked to changes in diatom assemblages in high-elevation lakes, pronounced and contemporaneous changes in other algal groups suggest additional drivers. We explored the origin and magnitude of changes in two mountain lakes from the end of the Little Ice Age at ca....

Oleksy, Isabella A.; Baron, Jill; Leavitt, Peter; Spaulding, Sarah

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Year Published: 2020

Height-related changes in forest composition, not tree vulnerability, explain increasing mortality with height during an extreme drought

Recently, Stovall et al.1 (hereafter SSY) showed that during an extreme drought, remotely sensed mortality of tall trees was more than double that of short trees. They interpreted this to be a consequence of inherently greater hydraulic vulnerability of tall trees, and suggested that tall-tree vulnerability should thus generalize more broadly....

Stephenson, Nathan L.; Das, Adrian

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Year Published: 2020

The role of warm, dry summers and variation in snowpack on phytoplankton dynamics in high-elevation lakes

Abstract Climate change is altering biogeochemical, metabolic, and ecological functions in lakes across the globe. Historically, mountain lakes in temperate regions have been unproductive due to brief ice-free seasons, a snowmelt-driven hydrograph, cold temperatures, and steep topography with low vegetation and soil cover. We tested the relative...

Oleksy, Isabella A.; Beck, Whitney; Lammers, R.; Steger, Cara; Wilson, Cody; Christensen, Kyle; Vincent, Kim; Johnson, Pieter; Baron, Jill

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Year Published: 2020

Wildfire-driven changes in hydrology mobilize arsenic and metals from legacy mine waste

Wildfires burning in watersheds that have been mined and since revegetated pose unique risks to downstream water supplies. A wildfire near Boulder, Colorado that burned a forested watershed recovering from mining disturbance that occurred 80-160 years ago allowed us to 1) assess arsenic and metal contamination in streams draining the burned area...

Murphy, Sheila F.; McCleskey, R. Blaine; Martin, Deborah A.; Holloway, JoAnn; Writer, Jeffrey H.

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Year Published: 2020

Wildfire-driven forest conversion in western North American landscapes

Changing disturbance regimes and climate can overcome forest ecosystem resilience. Following high-severity fire, forest recovery may be compromised by lack of tree seed sources, warmer and drier postfire climate, or short-interval reburning. A potential outcome of the loss of resilience is the conversion of the prefire forest to a different forest...

Coop, Jonathan D.; Parks, Sean A.; Stevens-Rumann, Camile S; Crausbay, Shelley D.; Higuera, Philip E.; Hurteau, Matthew D; Tepley, Alan J.; Whitman, Ellen; Assal, Timothy J; Collins, Brandon M.; Davis, Kimberley T; Dobrowski, Solomon; Falk, Donald A.; Fornwalt, Paula J.; Fulé, Peter Z; Harvey, Brian J.; Kane, Van R.; Littlefield, Caitlin E; Margolis, Ellis; North, Malcolm; Parisien, Marc-André; Prichard, Susan; Rodman, Kyle C

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Year Published: 2020

The Great Acceleration of fragrances and PAHs archived in an ice core from Elbrus, Caucasus

The Great Acceleration of the anthropogenic impact on the Earth system is marked by the ubiquitous distribution of anthropogenic materials throughout the global environment, including technofossils, radionuclides and the exponential increases of methane and carbon dioxide concentrations. However, personal care products as direct tracers of human...

Vecchiato, Marco; Gambaro, Andrea; Kehrwald, Natalie; Ginot, Patrick; Kutuzov, Stanislav; Mikhalenko, Vladimir; Barbante, Carlo

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Year Published: 2020

Frequency of extreme freeze events controls the distribution and structure of black mangroves (Avicennia germinans) near their northern range limit in coastal Louisiana

AimClimate change is expected to result in the tropicalization of coastal wetlands in the northern Gulf of Mexico, as warming winters allow tropical mangrove forests to expand their distribution poleward at the expense of temperate salt marshes. Data limitations near mangrove range limits have hindered understanding of the effects of winter...

Osland, Michael; Day, Richard; Michot, Thomas C.