Devin Leopold

Devin Leopold
Jonah Ventures

PhD

About

30
Publications
3,493
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
221
Citations
Introduction
I study microbial community ecology and plant-microbe interactions.
Skills and Expertise
Additional affiliations
March 2009 - August 2012
Stanford University
Position
  • Research Assistant

Publications

Publications (30)
Article
Closely related species are expected to have similar functional traits due to shared ancestry and phylogenetic inertia. However, few tests of this hypothesis are available for plant‐associated fungal symbionts. Fungal leaf endophytes occur in all land plants and can protect their host plant from disease by a variety of mechanisms, including by para...
Article
Full-text available
Introduced mammalian predators are responsible for the decline and extinction of many native species, with rats (genus Rattus ) being among the most widespread and damaging invaders worldwide. In a naturally fragmented landscape, we demonstrate the multi-year effectiveness of snap traps in the removal of Rattus rattus and Rattus exulans from lava-s...
Article
Full-text available
Ecological communities typically contain more species when located within geologically older regions. This pattern is traditionally attributed to the long-term accumulation of species in the regional species pool, with local species interactions playing a minor role. We provide evidence suggesting a more important role of local species interactions...
Article
Full-text available
Ericaceous plants rely on ericoid mycorrhizal fungi for nutrient acquisition. However, the factors that affect the composition and structure of fungal communities associated with the roots of ericaceous plants remain largely unknown. Here, we use a 4.1-myr soil chronosequence in Hawaii to test the hypothesis that changes in nutrient availability wi...
Preprint
Full-text available
Ericaceous plants rely on ericoid mycorrhizal fungi for nutrient acquisition. However, the factors that affect the composition and structure of these fungal communities remain largely unknown. Here, we use a 4.1-myr soil chronosequence in Hawaii to test the hypothesis that changes in nutrient availability with soil age determine the diversity and s...
Data
Habitat fragmentation resulting in habitat loss and increased isolation is a dominant driver of global species declines. Habitat isolation and connectivity vary across scales, and understanding how connectivity affects biodiversity can be challenging because the relevant scale depends on the taxa involved. A multiscale analysis can provide insight...
Article
The composition of host-associated microbiomes can have important consequences for host health and fitness [1, 2, 3]. Yet we still lack understanding of many fundamental processes that determine microbiome composition [4, 5]. There is mounting evidence that historical contingency during microbiome assembly may overshadow more deterministic processe...
Preprint
Full-text available
Local ecological communities tend to contain more species when they are located within a geologically older region, a pattern that has traditionally been attributed to the accumulation of species in the regional species pool. In this explanation, local species interactions are assumed to play a minor role in the formation of the regional species po...
Preprint
Full-text available
There is mounting evidence that species arrival order can affect microbiome composition, a phenomenon known as priority effects. However, it is less clear whether priority effects during microbiome assembly have consequences for the host, or whether intraspecific variation in host traits can alter the trajectory of microbiome assembly. In a greenho...
Article
Full-text available
Foliar fungi – pathogens, endophytes, epiphytes – form taxonomically diverse communities that affect plant health and productivity. The composition of foliar fungal communities is variable at spatial scales both small (e.g. individual plants) and large (e.g. continents), yet few studies have attempted to tease apart spatial from climatic factors in...
Article
Full-text available
Habitat fragmentation resulting in habitat loss and increased isolation is a dominant driver of global species declines. Habitat isolation and connectivity vary across scales, and understanding how connectivity affects biodiversity can be challenging because the relevant scale depends on the taxa involved. A multiscale analysis can provide insight...
Article
Full-text available
Worldwide, native species increasingly contend with the interacting stressors of habitat fragmentation and invasive species, yet their combined effects have rarely been examined. Direct negative effects of invasive omnivores are well documented, but the indirect effects of resource competition or those caused by predator avoidance are unknown. Here...
Data
Height of canopy increases with kīpuka size. Canopy heights were averaged over all foraging observations by kīpuka. Data are shown ± SE. Solid black line indicates line of best fit for treated kīpuka and dotted gray for untreated kīpuka. Canopy height increased with kīpuka size and did not differ between treatments. (PDF)
Data
GLMM model averaging results: Proportion of vertical foraging space occupied (canopy utilization by birds). (PDF)
Data
Post-hoc testing for Species (p-value adjustment method: fdr) of model described in Table D. (PDF)
Data
GLMM model averaging results: Foraging behavior effects on foraging height. (PDF)
Data
Mean foraging height of birds by rat treatment and horizontal foraging position. Foraging height was unaffected by horizontal foraging position of the bird within the canopy. Different letters indicate significance at p < 0.01. (PDF)
Data
GLMM model averaging results: Kīpuka characteristics and tree height. (PDF)
Data
GLMM model averaging results: Proportion of arthropod biomass per trap. (PDF)
Data
GLMM model averaging results: Foraging heights of Hawaiian forest birds by bird species. (PDF)
Chapter
Full-text available
High-throughput sequencing of taxon-specific loci, or DNA metabarcoding, has become an invaluable tool for investigating the composition of plant-associated fungal communities and for elucidating plant–fungal interactions. While sequencing fungal communities has become routine, there remain numerous potential sources of systematic error that can in...
Article
Full-text available
Both top-down (grazing) and bottom-up (resource availability) forces can determine the strength of priority effects, or the effects of species arrival history on the structure and function of ecological communities, but their combined influences remain unresolved. To test for such influences, we assembled experimental communities of wood-decomposin...
Article
Ericoid mycorrhiza occur only within the plant family Ericaceae, yet are globally widespread and contribute to carbon and nutrient cycling in many habitats where harsh conditions limit decomposition and plant nutrient uptake. An increasingly diverse range of fungi are recognized as ericoid symbionts and patterns in the distribution of ericoid taxa...
Article
Full-text available
The ecological conditions promoting evolutionary priority effects, where the order and timing of ancestral species arrival into a new habitat influences extant community assembly, are poorly understood. Studies in the New Zealand alpine indicated that early-arriving angiosperm lineages dominated communities via niche preemption. Forests have a much...
Article
Habitat fragmentation is well known to affect plant and animal diversity as a result of reduced habitat area and connectivity, but its effects on microorganisms are poorly understood. Using high- Throughput sequencing of two regions of the rRNA gene, we studied the effects of forest area and connectivity on the diversity and composition of fungi as...
Article
AimPriority effects, in which the order and timing of species arrival influence community assembly, are thought to be stronger in less stressful environments, reflecting increased competition, but this hypothesis has rarely been examined over evolutionary time. Here, we test the hypothesis using an island community of alpine plants.LocationMurchiso...
Conference Paper
Background/Question/Methods The order in which species colonize a community can influence community structure, with priority effects over both ecological and evolutionary timescales often resulting in communities dominated by early colonizers. However, the strength of priority effects in plant communities varies across environmental gradients, at...
Conference Paper
Background/Question/Methods Until recently, direct evidence of historical contingency in community assembly has been limited to laboratory manipulations and field experiments over short time scales. Advances in the resolution of molecular dating of phylogenetic relationships have made it possible to reconstruct immigration order over evolutionary...

Questions

Question (1)
Question
I am preparing to use some plasmid DNA to spike into soil samples at a known concentration as an internal standard to account for variable DNA extraction efficiency. I will also be looking at bacterial community composition (Illumina) and relative abundance (qPCR) using general 16s primers in these samples, so I am concerned about the possibility of adding E. coli 16s DNA along with the plasmid. My plasmid mini prep looks great on the gel and shows no sign of genomic contamination, but I am wondering if there is likely to still be enough bacterial genomic DNA to amplify? Does anyone know of a way to completely remove all traces of genomic DNA from a plasmid prep? Maybe I am being overly paranoid...

Network

Cited By