User profiles for W. John Calder

W. John Calder

PhD, University of Wyoming
Verified email at uwyo.edu
Cited by 744

Climate change, ecosystems and abrupt change: science priorities

MG Turner, WJ Calder… - … of the Royal …, 2020 - royalsocietypublishing.org
Ecologists have long studied patterns, directions and tempos of change, but there is a
pressing need to extend current understanding to empirical observations of abrupt changes as …

The quest for absolute abundance: The use of internal standards for DNA‐based community ecology

JG Harrison, W John Calder, B Shuman… - Molecular Ecology …, 2021 - Wiley Online Library
To characterize microbiomes and other ecological assemblages, ecologists routinely
sequence and compare loci that differ among focal taxa. Counts of these sequences convey …

Medieval warming initiated exceptionally large wildfire outbreaks in the Rocky Mountains

WJ Calder, D Parker, CJ Stopka… - Proceedings of the …, 2015 - National Acad Sciences
Many of the largest wildfires in US history burned in recent decades, and climate change
explains much of the increase in area burned. The frequency of extreme wildfire weather will …

Dirichlet‐multinomial modelling outperforms alternatives for analysis of microbiome and other ecological count data

JG Harrison, WJ Calder, V Shastry… - Molecular ecology …, 2020 - Wiley Online Library
Molecular ecology regularly requires the analysis of count data that reflect the relative abundance
of features of a composition (eg, taxa in a community, gene transcripts in a tissue). The …

Conifer expansion reduces the competitive ability and herbivore defense of aspen by modifying light environment and soil chemistry

WJ Calder, KJ Horn, SB St. Clair - Tree physiology, 2011 - academic.oup.com
Disturbance patterns strongly influence plant community structure. What remains less clear,
particularly at a mechanistic level, is how changes in disturbance cycles alter successional …

Facilitation drives mortality patterns along succession gradients of aspen‐conifer forests

WJ Calder, SB St. Clair - Ecosphere, 2012 - Wiley Online Library
While it is well established that facilitation and competition are important structuring forces
in plant communities, a clear understanding of the interactions between them and how they …

Extensive wildfires, climate change, and an abrupt state change in subalpine ribbon forests, Colorado

WJ Calder, B Shuman - Ecology, 2017 - Wiley Online Library
Ecosystems may shift abruptly when the effects of climate change and disturbance interact,
and landscapes with regularly patterned vegetation may be especially vulnerable to abrupt …

[HTML][HTML] Physiological effects of smoke exposure on deciduous and conifer tree species

WJ Calder, G Lifferth, MA Moritz… - International Journal of …, 2010 - hindawi.com
Smoke from forest fires can persist in the environment for weeks and while there is a substantial
amount of literature examining the effects of smoke exposure on seed germination, the …

Spatiotemporal Heterogeneity and Intragenus Variability in Rhizobacterial Associations with Brassica rapa Growth

SA Klasek, MT Brock, WJ Calder, HG Morrison… - Msystems, 2022 - Am Soc Microbiol
Microbial communities in the rhizosphere are distinct from those in soils and are influenced
by stochastic and deterministic processes during plant development. These communities …

The biogeochemical consequences of late Holocene wildfires in three subalpine lakes from northern Colorado

…, KK McLauchlan, BV Chileen, WJ Calder… - Quaternary Science …, 2020 - Elsevier
Wildfire activity has been increasing in forests of western North America over the past
several decades. However, the biogeochemical effects of changing fire regimes are poorly …