Don't judge species on their origins

  title={Don't judge species on their origins},
  author={Mark A. Davis and Matthew K. Chew and Richard J. Hobbs and Ariel E. Lugo and John J. Ewel and Geerat J. Vermeij and James H. Brown and Michael L. Rosenzweig and Mark R. Gardener and Scott P Carroll and Ken A. Thompson and Steward T. A. Pickett and Juliet C. Stromberg and Peter del Tredici and Katharine N. Suding and Joan G. Ehrenfeld and John Philip Grime and Joseph Mascaro and John C. Briggs},
Conservationists should assess organisms on environmental impact rather than on whether they are natives, argue Mark Davis and 18 other ecologists. 

A Unified Classification of Alien Species Based on the Magnitude of their Environmental Impacts

We present a method for categorising and comparing alien or invasive species in terms of how damaging they are to the environment, that can be applied across all taxa, scales, and impact metrics.

Nature conservation in the Anthropocene: preservation, restoration and the challenge of novel ecosystems

No sooner had we entered the twenty-first century than new words appeared to express an emerging re-conception of our place in the world. Foremost among these is the term “Anthropocene”. Since firs...

Origin matters: alien consumers inflict greater damage on prey populations than do native consumers

The results counter the assertion that the biogeographical origin of species has no bearing on their ecological impact, and hypothesize that the ecological naivete of native biota facilitates their enhanced suppression by alien predators and herbivores relative to native enemies.

Climate change-driven species' range shifts filtered by photoperiodism

The importance of adaptations to day length in predicting the latitudinal range shifts of different species under global warming is highlighted.

Predicting effects of large‐scale reforestation on native and exotic birds

Ecological restoration is critical for recovering biodiversity and ecosystem services, yet designing interventions to achieve particular outcomes remains fraught with challenges. In the extensive

Does urbanization lead to taxonomic and functional homogenization in riparian forests?

The effect of urbanization on plant diversity in riparian forests was twofold: it directly induced taxonomic and functional differentiation through its effect on species loss and turnover and indirectly favoured through the reduction in flooding.

Alien and native plant richness and abundance respond to different environmental drivers across multiple gravel floodplain ecosystems

To assess whether native and alien plant cover and richness respond similarly to flow regime, propagule pressure, climate and floodplain characteristics in highly dynamic braided river ecosystems.



Fruit quantity of invasive shrubs predicts the abundance of common native avian frugivores in central Pennsylvania

Since populations of key bird frugivores may be currently depending on Lonicera resources, it is argued that control measures should account for the negative effects that the loss of this fruit resource could have on populations of native consumers in highly invaded regions.

Conciliation biology: the eco-evolutionary management of permanently invaded biotic systems

A conciliatory approach to managing systems where novel organisms cannot or should not be eradicated, which utilizes the predictive power of evolutionary theory to offer diverse and flexible pathways to more sustainable outcomes.


Biologists are nearly unanimous in their belief that humanity is in the process of extirpating a significant portion of the earth's spe­ cies. The ways in which we are doing so reflect the magnitude

Changing Perceptions of Change: The Role of Scientists in Tamarix and River Management

The role of scientists in driving changes in perceptions of Tamarix from valuable import to vilified invader and (in some instances) back to a productive member of riparian plant communities is examined.

Evaluating the long-term project to eradicate the rangeland weed Martynia annua L.: linking community with conservation

Eradication of an invasive species is a holy grail sought by land managers, scientists and policy makers alike. This prize is particularly attractive to funding bodies that foresee a one-off

Historical Accumulation of Nonindigenous Forest Pests in the Continental United States

A comprehensive species list to assess the accumulation rates of nonindigenous forest insects and pathogens established in the United States found sap feeders and foliage feeders dominated the comprehensive list, but phloem- and wood-boring insects and foliageFeeders were often more damaging than expected.

The Monstering of Tamarisk: How Scientists made a Plant into a Problem

  • M. Chew
  • Environmental Science
    Journal of the history of biology
  • 2009
The story of tamarisk (Tamarix spp.), flowering trees and shrubs imported to New England sometime before 1818, provides an example of scientific “monstering” and shows how slaying the monster, rather than allaying its impacts, became a goal in itself.

Top 40 Priorities for Science to Inform US Conservation and Management Policy

To maximize the utility of research to decisionmaking, especially given limited financial resources, scientists must set priorities for their efforts. We present a list of the top 40 high-priority,

Invasion Biology

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