Matthew R. Helmus
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View article: A method to quantify jump dispersal of invasive species from occurrence data: the case of the spotted lanternfly, Lycorma delicatula
A method to quantify jump dispersal of invasive species from occurrence data: the case of the spotted lanternfly, Lycorma delicatula Open
The accuracy of predicting the spread of biological invasions is improved if models explicitly incorporate the two main dispersal mechanisms: diffusive spread and jump dispersal. However, quantitative methods for differentiating these two …
View article: Elevated human impact on islands increases the introduction and extinction status of native insular reptiles
Elevated human impact on islands increases the introduction and extinction status of native insular reptiles Open
In the Anthropocene, the ranges of introduced species are expanding, while extinction‐prone species are contracting. Introductions and extinctions are caused by how species respond to human impacts, but it is unknown why the ranges of some…
View article: Non-native herpetofauna of Aruba island (Caribbean): patterns and insights
Non-native herpetofauna of Aruba island (Caribbean): patterns and insights Open
Islands harbor a significant proportion of global biodiversity and also have disproportionately high richness of introduced species relative to continents. Given the sensitivity of island ecosystems to introduced species, data deficiencies…
View article: Dispersal restriction and facilitation in species with differing tolerance to development: A landscape genetics study of native and introduced lizards
Dispersal restriction and facilitation in species with differing tolerance to development: A landscape genetics study of native and introduced lizards Open
Aim The development of natural habitats into urban land uses has greatly accelerated in the recent past due to human activities. This habitat development disrupts species' natural dispersal processes and can lead to both direct and indirec…
View article: Standardized NEON Organismal Data for Biodiversity Research
Standardized NEON Organismal Data for Biodiversity Research Open
Understanding patterns and drivers of species distribution and abundance, and thus biodiversity, is a core goal of ecology. Despite advances in recent decades, research into these patterns and processes is limited by a lack of standardized…
View article: Spatiotemporal data for spotted lanternfly occurrence in the US
Spatiotemporal data for spotted lanternfly occurrence in the US Open
An aggregated data set containing anonymized, spatiotemporal occurrence data for the spotted lanternfly (Lycorma delicatula, White 1845) in the United States. More details on the data, and additional tools to visualize it, can be found her…
View article: Quantifying population resistance to climatic variability: The invasive spotted lanternfly grape pest is buffered against temperature extremes in California
Quantifying population resistance to climatic variability: The invasive spotted lanternfly grape pest is buffered against temperature extremes in California Open
Temperature time series data are a composition of average trends and stochastic variability that together shape population dynamics. However, models of temperature-dependent species often overlook variability, focusing solely on growth rat…
View article: lydemapr: an R package to track the spread of the invasive spotted lanternfly (Lycorma delicatula, White 1845) (Hemiptera, Fulgoridae) in the United States
lydemapr: an R package to track the spread of the invasive spotted lanternfly (Lycorma delicatula, White 1845) (Hemiptera, Fulgoridae) in the United States Open
A crucial asset in the management of invasive species is the open-access sharing of data on the range of invaders and the progression of their spread. Such data should be current, comprehensive, consistent and standardised, to support repr…
View article: Spatiotemporal data for spotted lanternfly occurrence in the US
Spatiotemporal data for spotted lanternfly occurrence in the US Open
An aggregated data set containing anonymized, spatiotemporal occurrence data for the spotted lanternfly (Lycorma delicatula, White 1845) in the United States. More details on the data, and additional tools to visualize it, can be …
View article: lydemapr: an R package to track the spread of the invasive Spotted Lanternfly (<i>Lycorma delicatula</i>, White 1845) (Hemiptera, Fulgoridae) in the United States
lydemapr: an R package to track the spread of the invasive Spotted Lanternfly (<i>Lycorma delicatula</i>, White 1845) (Hemiptera, Fulgoridae) in the United States Open
A crucial asset in the management of invasive species is the open-access sharing of data on the range of invaders and the progression of their spread. Such data should be current, comprehensive, consistent, and standardized, to support rep…
View article: Predicting and quantifying coexistence outcomes between resident and invading species using trait and abundance data
Predicting and quantifying coexistence outcomes between resident and invading species using trait and abundance data Open
A major challenge in invasion ecology is determining which introduced species pose a threat to resident species through competitive displacement. Here, we provide a statistical framework rooted in coexistence theory to calculate coexistenc…
View article: The great acceleration of island saturation by species introductions in the Anthropocene has altered species-area relationships
The great acceleration of island saturation by species introductions in the Anthropocene has altered species-area relationships Open
The species-area relationship (SAR) is a fundamental pattern of island biogeography which is often curvilinear due to reduced accumulation of species on mid-sized island caused by island isolation and the lack of speciation present on larg…
View article: Contemporizing island biogeography theory with anthropogenic drivers of species richness
Contemporizing island biogeography theory with anthropogenic drivers of species richness Open
Aim Island biogeography theory states that species richness increases with habitat diversity and decreases with isolation from source pools. However, ecological theory must incorporate effects of human activity to explain contemporary patt…
View article: Predicting host associations of the invasive spotted lanternfly on trees across the USA
Predicting host associations of the invasive spotted lanternfly on trees across the USA Open
Global impacts of invasive insect pests cost billions of dollars annually, but the impact of any individual pest species depends on the strength of associations with economically important plant hosts. Estimating host associations for a pe…
View article: Detecting stabilizing, directional, and disruptive patterns of anthropogenic species loss with general models of nonrandom extinction
Detecting stabilizing, directional, and disruptive patterns of anthropogenic species loss with general models of nonrandom extinction Open
The selective landscape that gave rise to Earth’s species has shifted in the Anthropocene. Humans have accelerated extinction pressures, making efforts to detect general non-random patterns of extinction increasingly important. Much resear…
View article: Multiscale assessment of oviposition habitat associations and implications for management in the spotted lanternfly (<i>Lycorma delicatula</i>), an emerging invasive pest
Multiscale assessment of oviposition habitat associations and implications for management in the spotted lanternfly (<i>Lycorma delicatula</i>), an emerging invasive pest Open
Control of incipient invaders—established invasive species in the early stages of spreading— can be inhibited by incomplete knowledge of the species’ habitat use. By identifying consistent habitat associations for incipient invaders early,…
View article: Paninvasion severity assessment of a U.S. grape pest to disrupt the global wine market
Paninvasion severity assessment of a U.S. grape pest to disrupt the global wine market Open
Economic impacts from plant pests are often felt at the regional scale, yet some impacts expand to the global scale through the alignment of a pest’s invasion potentials. Such globally invasive species (i.e., paninvasives) are like the hum…
View article: Standardized <scp>NEON</scp> organismal data for biodiversity research
Standardized <span>NEON</span> organismal data for biodiversity research Open
Understanding patterns and drivers of species distribution and abundance, and thus biodiversity, is a core goal of ecology. Despite advances in recent decades, research into these patterns and processes is currently limited by a lack of st…
View article: The hidden value of trees: Quantifying the ecosystem services of tree lineages and their major threats across the contiguous US
The hidden value of trees: Quantifying the ecosystem services of tree lineages and their major threats across the contiguous US Open
Trees provide critical contributions to human well-being. They sequester and store greenhouse gasses, filter air pollutants, provide wood, food, and other products, among other benefits. These benefits are threatened by climate change, fir…
View article: Elevated human impact on islands increases the introduction and extinction status of native insular reptiles
Elevated human impact on islands increases the introduction and extinction status of native insular reptiles Open
Species ranges are changing in the Anthropocene, the ranges of introduced species are expanding, while extinction-prone species are contracting. Introductions and extinctions are both caused by how species respond to human impacts, but it …
View article: Community stability is related to animal diversity change
Community stability is related to animal diversity change Open
Understanding the drivers of community stability in times of increasing anthropogenic pressure is an urgent issue. Biodiversity is known to promote community stability, but studies of the biodiversity–stability relationship rarely consider…
View article: First records of three new lizard species and a range expansion of a fourth lizard species introduced to Aruba
First records of three new lizard species and a range expansion of a fourth lizard species introduced to Aruba Open
The Caribbean islands are becoming a hotspot for the spread of non-native reptiles. Consistent with this trend, we provide the first documentation of three new lizard species discovered on Aruba, Anolis gingivinus (Cope, 1864), Anolis cris…
View article: Temperature sensitivity of pest reproductive numbers in age-structured PDE models, with a focus on the invasive spotted lanternfly
Temperature sensitivity of pest reproductive numbers in age-structured PDE models, with a focus on the invasive spotted lanternfly Open
Invasive pest establishment is a pervasive threat to global ecosystems, agriculture, and public health. The recent establishment of the invasive spotted lanternfly in the northeastern United States has proven devastating to farms and viney…
View article: Contemporizing island biogeography theory with anthropogenic drivers of species richness
Contemporizing island biogeography theory with anthropogenic drivers of species richness Open
Classic ecological theory must explain effects of humans on biodiversity to be more applicable today. We contemporized island biogeographic theory providing native, introduced, and total species richness relationship expectations with natu…
View article: Harnessing the NEON data revolution to advance open environmental science with a diverse and data‐capable community
Harnessing the NEON data revolution to advance open environmental science with a diverse and data‐capable community Open
It is a critical time to reflect on the National Ecological Observatory Network (NEON) science to date as well as envision what research can be done right now with NEON (and other) data and what training is needed to enable a diverse user …
View article: Disturbed habitats locally reduce the signal of deep evolutionary history in functional traits of plants
Disturbed habitats locally reduce the signal of deep evolutionary history in functional traits of plants Open
Summary The functioning of present ecosystems reflects deep evolutionary history of locally cooccurring species if their functional traits show high phylogenetic signal (PS). However, we do not understand what drives local PS. We hypothesi…
View article: Paninvasion severity assessment of a U.S. grape pest to disrupt the global wine market
Paninvasion severity assessment of a U.S. grape pest to disrupt the global wine market Open
Economic impacts from plant pests are often felt at the regional scale, yet some impacts expand to the global scale through the alignment of a pest’s invasion potentials. Such globally invasive species (i.e., paninvasives) are like the hum…
View article: The underpinnings of the relationship of species richness with space and time
The underpinnings of the relationship of species richness with space and time Open
Various ecological mechanisms influence the forms of species richness relationships (SRRs). These mechanisms can be gathered under five general categories: more individuals, environmental heterogeneity, dispersal limitations, biotic intera…
View article: Leveraging the NEON Airborne Observation Platform for socio‐environmental systems research
Leveraging the NEON Airborne Observation Platform for socio‐environmental systems research Open
During the 21st century, human–environment interactions will increasingly expose both systems to risks, but also yield opportunities for improvement as we gain insight into these complex, coupled systems. Human–environment interactions ope…
View article: Author response for "phyr: An R package for phylogenetic species‐distribution modelling in ecological communities"
Author response for "phyr: An R package for phylogenetic species‐distribution modelling in ecological communities" Open