Luke Mander
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View article: Digitizing collections to unlock the full potential of palynology: A case study with the Smithsonian palynology collection
Digitizing collections to unlock the full potential of palynology: A case study with the Smithsonian palynology collection Open
Societal Impact Statement Large palynological collections have been built over decades and contain vital information. However, they are often difficult to access and use effectively. What is the point of having such collections if they are…
View article: Genomic correlates of vascular plant reproductive complexity and the uniqueness of angiosperms
Genomic correlates of vascular plant reproductive complexity and the uniqueness of angiosperms Open
Summary Whole genome duplication (WGD) likely plays an important role in plant macroevolution, and has been implicated in diversification rate shifts, structural innovations, and increased disparity. But the general effects of WGD are chal…
View article: A 23‐million‐year record of morphological evolution within Neotropical grass pollen
A 23‐million‐year record of morphological evolution within Neotropical grass pollen Open
Summary Grass‐dominated biomes in South America comprise c . 20 million years of history, yet their evolution and underlying drivers remain poorly understood. Here we apply a novel approach that combines scanning electron microscopy imagin…
View article: The robustness of some Carboniferous fossil leaf venation networks to simulated damage
The robustness of some Carboniferous fossil leaf venation networks to simulated damage Open
Biological networks vary widely in their architecture and functional properties. Branching networks are good for transportation efficiency, while networks including loops offer good resistance to damage, and examples of these two topologie…
View article: The fossil insect assemblage associated with the Toarcian (Lower Jurassic) oceanic anoxic event from Alderton Hill, Gloucestershire, UK
The fossil insect assemblage associated with the Toarcian (Lower Jurassic) oceanic anoxic event from Alderton Hill, Gloucestershire, UK Open
Extreme global warming and environmental changes associated with the Toarcian (Lower Jurassic) Oceanic Anoxic Event (T-OAE, ~ 183 Mya) profoundly impacted marine organisms and terrestrial plants. Despite the exceptionally elevated abundanc…
View article: Quantifying the complexity of plant reproductive structures reveals a history of morphological and functional integration
Quantifying the complexity of plant reproductive structures reveals a history of morphological and functional integration Open
Vascular plant reproductive structures have undoubtedly become more complex through time, evolving highly differentiated parts that interact in specialized ways. But quantifying these patterns at broad scales is challenging because lineage…
View article: Grass pollen surface ornamentation is diverse across the phylogeny: Evidence from northern South America and the global literature
Grass pollen surface ornamentation is diverse across the phylogeny: Evidence from northern South America and the global literature Open
The grasses are one of the most diverse plant families on Earth. However, their classification and evolutionary history are obscured by their pollen stenopalynous (similar) morphology. A combination of high‐resolution imaging of pollen sur…
View article: Trait‐based approaches as ecological time machines: Developing tools for reconstructing long‐term variation in ecosystems
Trait‐based approaches as ecological time machines: Developing tools for reconstructing long‐term variation in ecosystems Open
Research over the past decade has shown that quantifying spatial variation in ecosystem properties is an effective approach to investigating the effects of environmental change on ecosystems. Yet, current consensus among scientists is that…
View article: Descriptive systematics of Upper Palaeocene–Lower Eocene pollen and spores from the northern Niger Delta, south-eastern Nigeria
Descriptive systematics of Upper Palaeocene–Lower Eocene pollen and spores from the northern Niger Delta, south-eastern Nigeria Open
Fossil pollen and spores are a vital source of information on the geological history of tropical vegetation including reconstructions of vegetation diversity and composition. However, such work relies on a sound taxonomic framework, and th…
View article: SEM images, quantitative analysis code of SEM images, and data analysis code for "Grass pollen surface ornamentation is diverse across the phylogeny: evidence from northern South America and the global literature"
SEM images, quantitative analysis code of SEM images, and data analysis code for "Grass pollen surface ornamentation is diverse across the phylogeny: evidence from northern South America and the global literature" Open
The grasses are one of the most diverse plant families on Earth, however, their classification and evolutionary history are obscured by their pollen stenopalynous (similar) morphology. A combination of high-resolution imaging of pollen sur…
View article: SEM images, quantitative analysis code of SEM images, and data analysis code for "Grass pollen surface ornamentation is diverse across the phylogeny: evidence from northern South America and the global literature"
SEM images, quantitative analysis code of SEM images, and data analysis code for "Grass pollen surface ornamentation is diverse across the phylogeny: evidence from northern South America and the global literature" Open
The grasses are one of the most diverse plant families on Earth, however, their classification and evolutionary history are obscured by their pollen stenopalynous (similar) morphology. A combination of high-resolution imaging of pollen sur…
View article: SEM images, quantitative analysis code of SEM images, and data analysis code for "Grass pollen surface ornamentation is diverse across the phylogeny: evidence from northern South America and the global literature"
SEM images, quantitative analysis code of SEM images, and data analysis code for "Grass pollen surface ornamentation is diverse across the phylogeny: evidence from northern South America and the global literature" Open
The grasses are one of the most diverse plant families on Earth, however, their classification and evolutionary history are obscured by their pollen stenopalynous (similar) morphology. A combination of high-resolution imaging of pollen sur…
View article: Geometric and topological approaches to shape variation in <i>Ginkgo</i> leaves
Geometric and topological approaches to shape variation in <i>Ginkgo</i> leaves Open
Leaf shape is a key plant trait that varies enormously. The range of applications for data on this trait requires frequent methodological development so that researchers have an up-to-date toolkit with which to quantify leaf shape. We gene…
View article: Long and short orbital forcing of Jurassic wildfires.
Long and short orbital forcing of Jurassic wildfires. Open
<p>Fire regimes are changing due to anthropogenic climatic drivers and fuel management challenges in all regions of Earth. However, the planet is also subject to natural background variability due to Earth&#8217;s orbital paramet…
View article: Geometric and Topological Approaches to Shape Variation in<i>Ginkgo</i>Leaves
Geometric and Topological Approaches to Shape Variation in<i>Ginkgo</i>Leaves Open
Leaf shape is a key plant trait that varies enormously. The diversity of leaf shape, and the range of applications for data on this trait, requires frequent methodological developments so that researchers have an up-to-date toolkit with wh…
View article: Phylogenetic and ecological correlates of pollen morphological diversity in a Neotropical rainforest
Phylogenetic and ecological correlates of pollen morphological diversity in a Neotropical rainforest Open
Morphology varies enormously across clades, and the morphology of a trait may reflect ecological function or the retention of ancestral features. We examine the tension between ecological and phylogenetic correlates of morphological divers…
View article: A morphological study of ultrastructure and macrostructure of living Quercus (oak) pollen from California using scanning electron microscope and light microscope
A morphological study of ultrastructure and macrostructure of living Quercus (oak) pollen from California using scanning electron microscope and light microscope Open
1Hsiung, Shih-Yi, 2Looy, Cindy,3Mander, Luke, and 4 Papper, Prahlada,1,2 Department of Integrative Biology and Museum of Paleontology, University of California, 3060 Valley Life Sciences Building #3140, Berkeley, California 94720, USA.3 Co…
View article: Orbital pacing of large fluctuations in wildfire activity during the Pliensbachian
Orbital pacing of large fluctuations in wildfire activity during the Pliensbachian Open
<p>At present Earth&#8217;s climate is warming and the frequency of large wildfires appears to be increasing (Westerling and Bryant, 2008). Long term trends in climate and the effect on wildfire are understudied and examining the…
View article: Milankovitch forcing of Early Jurassic wildfires
Milankovitch forcing of Early Jurassic wildfires Open
The Early Jurassic was characterized by major climatic and environmental perturbations which can be seen preserved at high resolution on orbital timescales. The Early Jurassic is a period of overall global warmth, and therefore serves as a…
View article: Milankovitch forcing of Early Jurassic wildfires
Milankovitch forcing of Early Jurassic wildfires Open
The Early Jurassic was characterized by major climatic and environmental perturbations which can be seen preserved at high resolution on orbital timescales. The Early Jurassic is a period of overall global warmth, and therefore serves as a…
View article: Measuring Biodiversity and Extinction—Present and Past
Measuring Biodiversity and Extinction—Present and Past Open
How biodiversity is changing in our time represents a major concern for all organismal biologists. Anthropogenic changes to our planet are decreasing species diversity through the negative effects of pollution, habitat destruction, direct …
View article: The Latitudinal Distribution of Morphological Diversity among Holocene Angiosperm Pollen Grains from Eastern North America and the Neotropics
The Latitudinal Distribution of Morphological Diversity among Holocene Angiosperm Pollen Grains from Eastern North America and the Neotropics Open
Current knowledge about the biogeographic patterns of biodiversity is based mostly on taxonomic diversity, which is typically measured as the number of species or higher taxa. In this paper I analyze 26 previously published Holocene lake c…
View article: The influence of environmental forcing on biodiversity and extinction in a resource competition model
The influence of environmental forcing on biodiversity and extinction in a resource competition model Open
In this paper, we study a model of many species that compete, directly or indirectly, for a pool of common resources under the influence of periodic, stochastic, and/or chaotic environmental forcing. Using numerical simulations, we find th…
View article: Minor climatic fluctuations lead to species extinction in a conceptual ecosystem model
Minor climatic fluctuations lead to species extinction in a conceptual ecosystem model Open
The extinction of species is a core process that affects the diversity of life on Earth. One way of investigating the causes and consequences of extinctions is to build conceptual ecological models, and to use the dynamical outcomes of suc…
View article: The Geometry of Large Tundra Lakes Observed in Historical Maps and Satellite Images
The Geometry of Large Tundra Lakes Observed in Historical Maps and Satellite Images Open
The climate of the Arctic is warming rapidly and this is causing major changes to the cycling of carbon and the distribution of permafrost in this region. Tundra lakes are key components of the Arctic climate system because they represent …
View article: A morphometric analysis of vegetation patterns in dryland ecosystems
A morphometric analysis of vegetation patterns in dryland ecosystems Open
Vegetation in dryland ecosystems often forms remarkable spatial patterns. These range from regular bands of vegetation alternating with bare ground, to vegetated spots and labyrinths, to regular gaps of bare ground within an otherwise cont…
View article: Data from: A morphometric analysis of vegetation patterns in dryland ecosystems
Data from: A morphometric analysis of vegetation patterns in dryland ecosystems Open
Vegetation in dryland ecosystems often forms remarkable spatial patterns. These range from regular bands of vegetation alternating with bare ground, to vegetated spots and labyrinths, to regular gaps of bare ground within an otherwise cont…
View article: A combinatorial approach to angiosperm pollen morphology
A combinatorial approach to angiosperm pollen morphology Open
Angiosperms (flowering plants) are strikingly diverse. This is clearly expressed in the morphology of their pollen grains, which are characterized by enormous variety in their shape and patterning. In this paper, I approach angiosperm poll…