14 Works

Spenders versus savers: climate-induced carbon allocation tradeoffs in a recently introduced woody plant

Randall Long, Tom Dudley, Carla D'Antonio, Kevin Grady, Susan Bush & Kevin Hultine
Non-structural carbohydrate(NSC) storage may be under strong selection in woody plant species that occur across strong environmental gradients. We therefore investigated carbon allocation strategies in a widely distributed, introduced woody plant. We predicted genotypes from cold climates with exposure to episodic freeze events, would have elevated NSC concentrations with the tradeoff of reduced growth and reproduction relative to warm-adapted genotypes. We established an experimental common garden using genotypes of Tamarix spp., sourced across a large...

Dataset from: Warming effects on grassland productivity depend on plant diversity

Junjiong Shao, Xuhui Zhou, Kees Van Groenigen, Guiyao Zhou, Huimin Zhou, Lingyan Zhou, Meng Lu, Jianyang Xia, Lin Jiang, Bruce Hungate, Yiqi Luo, Fangliang He & Madhav Thakur
Aim: Climate warming and biodiversity loss both alter plant productivity, yet we lack an understanding of how biodiversity regulates the responses of ecosystems to warming. In this study, we examine how plant diversity regulates the responses of grassland productivity to experimental warming using meta-analytic techniques. Location: Global Major taxa studied: Grassland ecosystems Methods: Our meta-analysis is based on warming responses of 40 different plant communities obtained from 20 independent studies on grasslands across five continents....

Hypothalamic remodeling of thyroid hormone signaling during hibernation in the arctic ground squirrel

Helen Chmura, Cassie Duncan, Ben Saer, Jeanette Moore, Brian Barnes, C. Loren Buck, Helen Christian, Andrew Loudon & Cory Williams
These data were collected from arctic ground squirrels (Urocitellus parryii) between Summer 2016 and Spring 2019 on a collaborative NSF-funded project examining the neuroendocrine regulation of the transition between hibernation and reproduction. The three experiments consist of (1) a repeated cross-sectional study conducted in both males and females hibernating in constant darkness and constant temperature (2) an extreme mid-winter warming study conducted in males only and (3) an end of hibernation warming study conducted in...

Mangrove diversity enhances plant biomass production and carbon storage in Hainan Island, China

Jiankun Bai, Yuchen Meng, Ruikun Gou, Jiacheng Lyu, Zheng Dai, Xiaoping Diao, Hongsheng Zhang, Yiqi Luo, Xiaoshan Zhu & Guanghui Lin
Mangrove forests, one of the highest carbon density ecosystems, are very different from other forests as they occupy saline and tidal habitats. Although previous studies in forests, shrublands, and grasslands have shown a positive effect of biodiversity on plant biomass and carbon storage, it remains unclear whether this relation to biodiversity also exists in mangrove forests. Here, we evaluate the possible effects of mangrove species diversity, structural characteristics, and environmental factors on mangrove biomass production...

Directional selection shifts trait distributions of planted species in dryland restoration

Kathleen Balazs, Seth Munson, Caroline A. Havrilla & Brad Butterfield
1. The match between species trait values and local abiotic filters can restrict community membership. An often-implicit assumption of this relationship is that abiotic filters select for a single locally optimal strategy, though difficulty in isolating effects of the abiotic environment from those of dispersal limitation and biotic interactions has resulted in few empirical tests of this assumption. Similar constraints have made it difficult to assess whether the type and intensity of abiotic filters shift...

FEWSION supply chain data science

Benjamin Ruddell

Plastic responses to hot temperatures homogenize riparian leaf litter, speed decomposition, and reduce detritivores

Joann Jeplawy, Hillary Cooper, Jane Marks, Richard Lindroth, Morgan Andrews, Zacchaeus Compson, Catherine Gehring, Kevin Hultine, Kevin Grady, Thomas Whitham, Gerard Allan & Rebecca Best
Efforts to maintain the function of critical ecosystems under climate change often begin with foundation species. In the southwestern US, cottonwood trees support diverse communities in riparian ecosystems that are threatened by rising temperatures. Genetic variation within cottonwoods shapes communities and ecosystems, but these effects may be modified by phenotypic plasticity, where genotype traits change in response to environmental conditions. Here, we investigated plasticity in Fremont cottonwood (Populus fremontii) leaf litter traits as well as...

Repeated genetic and adaptive phenotypic divergence across tidal elevation in a foundation plant species

Robyn Zerebecki, Erik E Sotka, Torrance C Hanley, Katherine L. Bell, Catherine Gehring, Chris C. Nice, Christina L. Richards & A Randall Hughes
Microgeographic genetic divergence can create fine-scale trait variation. When such divergence occurs within foundation species, then it might impact community structure and ecosystem function, and cause other cascading ecological effects. We tested for parallel microgeographic trait and genetic divergence in Spartina alterniflora , a foundation species that dominates salt marshes of the US Atlantic and Gulf coasts. Spartina is characterized by tall-form (1-2m) plants at lower tidal elevations and short-form (<0.5m) plants at higher tidal...

Community composition influences ecosystem resistance and productivity more than species richness or intraspecific diversity

Matthew Bowker, M. Cristina Rengifo-Faiffer, Anita Antoninka, Henry Grover, Kirsten Coe, Kirsten Fisher, Brent Mishler, Mel Oliver & Lloyd Stark
Biodiversity describes the variety of life and may influence properties and processes of ecosystems, such as biomass production and resistance to disturbance. We investigated the effects of multiple facets of biodiversity – species richness and composition of the community, and intraspecific diversity in two key species – on both production and resistance of experimentally-assembled biological soil crusts (biocrusts). We found that productivity was most strongly influenced by community composition (variation in the presence and relative...

Data from: Molecular phylogeny and taxonomic revision of the genus Diastatea (Campanulaceae: Lobelioideae)

Elizabeth Johnson & Tina Ayers
Diastatea (Campanulaceae-Lobelioideae) is a genus of small, herbaceous annuals found mostly in Mexico. Differences in the number of recognized species in the historical treatments, and the lack of a phylogeny, suggested that a revision of the genus was necessary. Species boundaries and species level relationships were tested based on a sampling of nearly 50 individuals. Sequences of the chloroplast spacer regions, atpB-rbcL and ndhF-rpl32, as well as the ITS, were generated and then analyzed using...

Zapus eDNA detection data

Jacque Lyman, Daniel Sanchez, Samantha Hershauer, Colin Sobek, Carol Chambers, Jennifer Zahratka & Faith Walker
The New Mexico meadow jumping mouse (Zapus hudsonius luteus) is a riparian obligate species native to the southwestern United States. The species was listed endangered in 2014 due to habitat loss by over-grazing, wildfire, and recreation. Jumping mice move through streamside, herbaceous vegetation, and may leave behind cells suitable for environmental DNA (eDNA) analysis. Use of eDNA to detect the presence of the animal from vegetation can complement current survey approaches (live capturing, track plating,...

Bedrock weathering controls on terrestrial carbon-nitrogen-climate interactions

Pawlok Dass, Benjamin Houlton, Yingping Wang, David Warlind & Scott Morford
Anthropogenic nitrogen deposition is widely considered to increase CO2 sequestration by land plant communities on a global scale. Here, we suggest that bedrock nitrogen weathering contributes significantly more to nitrogen-carbon interactions than anthropogenic nitrogen deposition. This working hypothesis is based on the application of empirical results into a global biogeochemical simulation model from the mid-1800s to the end of the 21st century. We demonstrate that rock nitrogen inputs have contributed roughly 2 to 11 times...

A revised classification of Glossopetalon (Crossosomataceae) based on restriction site-associated DNA sequencing

Maya Allen & Tina Ayers
Glossopetalon inhabits arid regions in the American west and northern Mexico on limestone substrates. The genus comprises four species: G. clokeyi ; G. pungens ; G. texense ; and G. spinescens . Three of the species are narrow endemics. The fourth, G. spinescens , is a widespread species with six recognized varieties. All six varieties are intricately branched shrubs that have been difficult to identify due to a lack of clearly delineating morphological characters. Characters...

Precipitation manipulation and terrestrial carbon cycle: the roles of treatment magnitude, experimental duration, and background climate

Jinsong Wang, Dashuan Tian, Alan K. Knapp, Han Y. H. Chen, Yiqi Luo, Zhaolei Li, Enqing Hou, Xinzhao Huang, Lifen Jiang & Shuli Niu
Aim: Precipitation manipulation experiments have shown diverse terrestrial carbon (C) cycling responses when the ecosystem is subjected to different magnitudes of altered precipitation, various experimental durations, or heterogeneity in local climates. However, how these factors combine to affect C cycle responses to changes in precipitation remains unclear. Location: Global. Time period: 1990–2019. Major taxa studied: Terrestrial ecosystems. Methods: Using observations from 230 published studies in which precipitation was manipulated and terrestrial C cycling variables were...

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