Heather A. Hager

Wilting wildflowers and bummed‐out bees: Climate change threatens US state symbols

Xuezhen Ge, Zou Ya, Heather A. Hager, Jonathan A. Newman

Abstract Species designated as state symbols in the United States carry cultural importance and embody historical heritage. However, they are threatened by climate change and even face the risk of local or global extinction. The responses of these species to climate change …

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Routledge Handbook of Grasslands

Heather A. Hager, David John Gibson, Jonathan A. Newman

Despite their importance for providing essential ecosystem services, grasslands are barely addressed in global or regional policies. We provide an overview of different grassland policies, their effectiveness on the intended outcome, as well as their socioeconomic effects. For the overview, we reviewed …

Saving our shared heritage

David J. Gibson, Jonathan A. Newman, Heather A. Hager

Grasslands have played a crucial role in shaping the Earth’s biosphere and continue to be vital for ecological processes, biodiversity conservation, and human livelihoods. This chapter summarizes the state of grasslands knowledge based on the chapters in this Handbook , highlighting the …

Endophytes unveiled

Jonathan A. Newman, Heather A. Hager

The interaction between grasses and their microbial endophytes, particularly fungi and bacteria, is a complex and multifaceted phenomenon with profound implications for grassland ecosystems, agriculture, and environmental sustainability. This chapter aims to provide an overview of grass-microbial interactions, exploring the diversity of …

Grasslands at the crossroads

Jonathan A. Newman, David J. Gibson, Heather A. Hager

This introductory chapter outlines the structure and scope of this edited volume, which explores the complex and diverse dimensions of grassland ecosystems through five interconnected sections. Part I , titled Foundations , provides essential context by examining the evolutionary origins, global diversity, …

Same data, different analysts: variation in effect sizes due to analytical decisions in ecology and evolutionary biology

Elliot Gould, Hannah S. Fraser, Timothy Parker, Shinichi Nakagawa et autres

Although variation in effect sizes and predicted values among studies of similar phenomena is inevitable, such variation far exceeds what might be produced by sampling error alone. One possible explanation for variation among results is differences among researchers in the decisions they …

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The social landscape of wolves in Canada - preliminary findings

Stephanie Rutherford, Valli-Laurente Fraser-Celin, Heather A. Hager, Laurie Fox et autres

Despite the long-standing presence of wolves (Canis lupus) in Canada, attitudes toward wolves have been understudied at the national scale. However, such data can inform wildlife management policies and robust coexistence strategies. We developed an 11-question survey to assess “the social landscape” …

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Allelopathic effects of Epichloë fungal endophytes: experiment and meta-analysis

Heather A. Hager, Maija Gailis, Jonathan A. Newman

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Costs, Benefits, Parasites and Mutualists: The Use and Abuse of the Mutualism–Parasitism Continuum Concept for “Epichloë” Fungi

Jonathan A. Newman, Sierra Gillis, Heather A. Hager

The species comprising the fungal endophyte genus Epichloë are symbionts of cool season grasses. About half the species in this genus are strictly vertically transmitted, and evolutionary theory suggests that these species must be mutualists. Nevertheless, Faeth and Sullivan (e.g., 2003) have …

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Allelopathic effects of Epichloë fungal endophytes: experiment and meta-analysis

Heather A. Hager, Maija Gailis, Jonathan A. Newman

Abstract Host-specific Epichloë spp .endophytic fungal symbionts of pooid grasses that produce herbivore-deterring alkaloids and alter the grass host’s metabolite and protein profiles. Early observations suggested that Epichloë may have negative allelopathic effects on neighbouring plant species, particularly Trifolium spp . clovers, …

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Effects of nutrient addition on endophyte-associated grass invasion in a long-term, old-field community experiment

Heather A. Hager, Jennifer L. Roloson, Kruti Shukla, Kathryn Anne Yurkonis et autres

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Costs, Benefits, Parasites and Mutualists: The Use and Abuse of the Mutualism–Parasitism Continuum Concept for Epichloë Fungi

Jonathan A. Newman, Sierra Gillis, Heather A. Hager

Abstract The species comprising the fungal endophyte genus Epichloë are symbionts of cool season grasses. About half the species in this genus are strictly vertically transmitted, and evolutionary theory suggests that these species must be mutualists. Nevertheless, Faeth and Sullivan (e.g. 2003) …

ca (code pays fourni par la source)