Charles E. Mitchell
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View article: Seasonal assembly of the phyllosphere fungal microbiome of a perennial grass is robust to nutrient addition
Seasonal assembly of the phyllosphere fungal microbiome of a perennial grass is robust to nutrient addition Open
The leaf microbiome plays an important role in plant health and defense. Despite its importance, how the assembly of the leaf microbial community is modified by environmental conditions such as nutrient availability remains relatively unin…
View article: Disease epidemics and species interactions: A manipulation of seasonal establishment of fungal diseases in an old field
Disease epidemics and species interactions: A manipulation of seasonal establishment of fungal diseases in an old field Open
Many disease epidemics recur seasonally, and such seasonal epidemics can be shaped by species interactions among parasites, pathogens, or other microbes. Field experiments are a classic approach for understanding species interactions but a…
View article: Amplification of disease by nutrient addition: Testing mechanisms from individual to community levels
Amplification of disease by nutrient addition: Testing mechanisms from individual to community levels Open
Nutrient supply can amplify disease epidemics through mechanisms from individual to community levels. Within host individuals, nutrient addition can drive pathogen replication or growth. Across a host population, nutrient addition can driv…
View article: Leaf age structures phyllosphere microbial communities in the field and greenhouse
Leaf age structures phyllosphere microbial communities in the field and greenhouse Open
The structure of the leaf microbiome can alter host fitness and change in response to abiotic and biotic factors, like seasonality, climate, and leaf age. However, relatively few studies consider the influence of host age on microbial comm…
View article: Leaf age structures phyllosphere microbial communities in the field and greenhouse
Leaf age structures phyllosphere microbial communities in the field and greenhouse Open
The structure of the leaf microbiome can alter host fitness and change in response to abiotic and biotic factors, like seasonality, climate, and leaf age. However, relatively few studies consider the influence of host age on microbial comm…
View article: Order of arrival and nutrient supply alter outcomes of co-infection with two fungal pathogens
Order of arrival and nutrient supply alter outcomes of co-infection with two fungal pathogens Open
A pathogen arriving on a host typically encounters a diverse community of microbes that can shape priority effects, other within-host interactions and infection outcomes. In plants, environmental nutrients can drive trade-offs between host…
View article: Eutrophication, biodiversity loss, and species invasions modify the relationship between host and parasite richness during host community assembly
Eutrophication, biodiversity loss, and species invasions modify the relationship between host and parasite richness during host community assembly Open
Host and parasite richness are generally positively correlated, but the stability of this relationship in response to global change remains poorly understood. Rapidly changing biotic and abiotic conditions can alter host community assembly…
View article: Interactions among symbionts operate across scales to influence parasite epidemics
Interactions among symbionts operate across scales to influence parasite epidemics Open
Parasite epidemics may be influenced by interactions among symbionts, which can depend on past events at multiple spatial scales. Within host individuals, interactions can depend on the sequence in which symbionts infect a host, generating…
View article: Parasites, niche modification and the host microbiome: A field survey of multiple parasites
Parasites, niche modification and the host microbiome: A field survey of multiple parasites Open
Parasites can affect and be affected by the host's microbiome, with consequences for host susceptibility, parasite transmission, and host and parasite fitness. Yet, two aspects of the relationship between parasite infection and host microb…
View article: Past is prologue: host community assembly and the risk of infectious disease over time
Past is prologue: host community assembly and the risk of infectious disease over time Open
Infectious disease risk is often influenced by host diversity, but the causes are unresolved. Changes in diversity are associated with changes in community structure, particularly during community assembly; therefore, by incorporating chan…
View article: A host immune hormone modifies parasite species interactions and epidemics: insights from a field manipulation
A host immune hormone modifies parasite species interactions and epidemics: insights from a field manipulation Open
Parasite epidemics can depend on priority effects, and parasite priority effects can result from the host immune response to prior infection. Yet we lack experimental evidence that such immune-mediated priority effects influence epidemics.…
View article: Indirect interactions among co-infecting parasites and a microbial mutualist impact disease progression
Indirect interactions among co-infecting parasites and a microbial mutualist impact disease progression Open
Interactions among parasites and other microbes within hosts can impact disease progression, yet study of such interactions has been mostly limited to pairwise combinations of microbes. Given the diversity of microbes within hosts, indirec…
View article: Order of arrival and nutrient supply alter outcomes of coinfection with two fungal pathogens
Order of arrival and nutrient supply alter outcomes of coinfection with two fungal pathogens Open
A pathogen arriving on a host typically encounters a diverse community of microbes that can shape priority effects, other within-host interactions, and infection outcomes. In plants, environmental nutrients can drive tradeoffs between host…
View article: Disease decreases variation in host community structure in an old-field grassland
Disease decreases variation in host community structure in an old-field grassland Open
Disease may drive variation in host community structure by modifying the interplay of deterministic and stochastic processes that shape communities. For instance, deterministic processes like ecological selection can benefit species less i…
View article: Historical contingency in parasite community assembly: Community divergence results from early host exposure to symbionts and ecological drift
Historical contingency in parasite community assembly: Community divergence results from early host exposure to symbionts and ecological drift Open
Host individuals are commonly coinfected with multiple parasite species that may interact to shape within-host parasite community structure. In addition to within-host species interactions, parasite communities may also be structured by ot…
View article: An integrative biostratigraphic, chemostratigraphic, and sequence stratigraphic perspective of the Ordovician–Silurian boundary on Anticosti Island (Canada)
An integrative biostratigraphic, chemostratigraphic, and sequence stratigraphic perspective of the Ordovician–Silurian boundary on Anticosti Island (Canada) Open
Anticosti Island, Canada, has long been recognized as an exceptional OrdovicianâSilurian boundary succession with the potential to serve as one of the best records of climatic, oceanographic, and biological events associated with the Lat…
View article: Historical contingency in parasite community assembly: Community divergence results from early host exposure to symbionts and ecological drift
Historical contingency in parasite community assembly: Community divergence results from early host exposure to symbionts and ecological drift Open
Host individuals are commonly coinfected with multiple parasite species that may interact to shape within-host parasite community structure. In addition to within-host species interactions, parasite communities may also be structured by ot…
View article: Disease decreases variation in host community structure in an old-field grassland
Disease decreases variation in host community structure in an old-field grassland Open
Disease may modulate variation in host community structure by modifying the interplay of deterministic and stochastic processes. For instance, deterministic processes like ecological selection can benefit species less impacted by disease. …
View article: A Microbial Mutualist Within Host Individuals Increases Parasite Transmission Between Host Individuals: Evidence From a Field Mesocosm Experiment
A Microbial Mutualist Within Host Individuals Increases Parasite Transmission Between Host Individuals: Evidence From a Field Mesocosm Experiment Open
The interactions among host-associated microbes and parasites can have clear consequences for disease susceptibility and progression within host individuals. Yet, empirical evidence for how these interactions impact parasite transmission b…
View article: A Microbial Mutualist Within Host Individuals Increases Parasite Transmission Between Host Individuals: Evidence From a Field Mesocosm Experiment
A Microbial Mutualist Within Host Individuals Increases Parasite Transmission Between Host Individuals: Evidence From a Field Mesocosm Experiment Open
The interactions among host-associated microbes and parasites can have clear consequences for disease susceptibility and progression within host individuals. Yet, empirical evidence for how these interactions impact parasite transmission b…
View article: A microbial mutualist within host individuals increases parasite transmission between host individuals: Evidence from a field mesocosm experiment
A microbial mutualist within host individuals increases parasite transmission between host individuals: Evidence from a field mesocosm experiment Open
The interactions among host-associated microbes and parasites can have clear consequences for disease susceptibility and progression within host individuals. Yet, empirical evidence for how these interactions impact parasite transmission b…
View article: Host exposure to symbionts and ecological drift generate divergence in parasite community assembly
Host exposure to symbionts and ecological drift generate divergence in parasite community assembly Open
The initial colonization of a host by symbionts, ranging from parasites to mutualists, can generate priority effects that alter within-host interactions and the trajectory of parasite community assembly. At the same time, variation in para…
View article: Nutrient enrichment increases invertebrate herbivory and pathogen damage in grasslands
Nutrient enrichment increases invertebrate herbivory and pathogen damage in grasslands Open
Plant damage by invertebrate herbivores and pathogens influences the dynamics of grassland ecosystems, but anthropogenic changes in nitrogen and phosphorus availability can modify these relationships. Using a globally distributed experimen…
View article: Grassland productivity limited by multiple nutrients
Grassland productivity limited by multiple nutrients Open
Terrestrial ecosystem productivity is widely accepted to be nutrient limited. Although nitrogen is deemed a key determinant of aboveground net primary production, the prevalence of co-limitation by nitrogen and phosphorus is increasingly r…
View article: Indirect interactions among co-infecting parasites and a microbial mutualist impact disease progression
Indirect interactions among co-infecting parasites and a microbial mutualist impact disease progression Open
Interactions among parasites and other microbes within hosts can impact disease progression, yet study of such interactions has been mostly limited to pairwise combinations of microbes. Given the diversity of microbes within hosts, indirec…
View article: Viral diversity and prevalence gradients in North American Pacific Coast grasslands
Viral diversity and prevalence gradients in North American Pacific Coast grasslands Open
Host-pathogen interactions may be governed by the number of pathogens coexisting within an individual host (i.e., coinfection) and among different hosts, although most sampling in natural systems focuses on the prevalence of single pathoge…
View article: DIRECT AND INTERACTIVE EFFECTS OF ENEMIES AND MUTUALISTS ON PLANT PERFORMANCE: A META-ANALYSIS
DIRECT AND INTERACTIVE EFFECTS OF ENEMIES AND MUTUALISTS ON PLANT PERFORMANCE: A META-ANALYSIS Open
Plants engage in multiple, simultaneous interactions with other species; some (enemies) reduce and others (mutualists) enhance plant performance. Moreover, effects of different species may not be independent of one another; for example, en…
View article: Modeling landscape-scale pathogen spillover between domesticated and wild hosts: Asian soybean rust and kudzu
Modeling landscape-scale pathogen spillover between domesticated and wild hosts: Asian soybean rust and kudzu Open
Many emerging pathogens infect both domesticated and wild host species, creating the potential for pathogen transmission between domesticated and wild populations. This common situation raises the question of whether managing negative impa…