The conservation paradox of endangered and invasive species

Marchetti, Michael P.; Engstrom, Tag N.

doi:10.1111/cobi.12642

Cited by 35 publications

(27 citation statements)

References 12 publications

(16 reference statements)

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“…As is sometimes the case with introduced species [140], some of the bee species that are considered invasive in their introduced range have become quite rare in their native range, such as Bombus ruderatus [141] and B. subterraneous [142]. The management options for these bees in their introduced range are more complicated because conservation in their native range is also a concern.…”

Section: Discussionmentioning

confidence: 99%

Positive and Negative Impacts of Non-Native Bee Species around the World

Russo

2016

Insects

124

157

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Though they are relatively understudied, non-native bees are ubiquitous and have enormous potential economic and environmental impacts. These impacts may be positive or negative, and are often unquantified. In this manuscript, I review literature on the known distribution and environmental and economic impacts of 80 species of introduced bees. The potential negative impacts of non-native bees include competition with native bees for nesting sites or floral resources, pollination of invasive weeds, co-invasion with pathogens and parasites, genetic introgression, damage to buildings, affecting the pollination of native plant species, and changing the structure of native pollination networks. The potential positive impacts of non-native bees include agricultural pollination, availability for scientific research, rescue of native species, and resilience to human-mediated disturbance and climate change. Most non-native bee species are accidentally introduced and nest in stems, twigs, and cavities in wood. In terms of number of species, the best represented families are Megachilidae and Apidae, and the best represented genus is Megachile. The best studied genera are Apis and Bombus, and most of the species in these genera were deliberately introduced for agricultural pollination. Thus, we know little about the majority of non-native bees, accidentally introduced or spreading beyond their native ranges.

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Section: Discussionmentioning

confidence: 99%

Positive and Negative Impacts of Non-Native Bee Species around the World

Russo

2016

Insects

124

157

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“…Today, this occurs frequently as an impact of illegal wildlife trade, but past introductions of common species that have subsequently undergone declines in their native range are also increasingly being recognized (Gibson & Yong, ). These non‐native populations are steadily being acknowledged for their potential to be used for conservation programs in the form of translocations back into native ranges (Garzón‐Machado, del‐Arco‐Aguilar, & Pérez‐de‐Paz, ; Marchetti & Engstrom, ). These translocations can lead to the genetic rescue of native populations, which can alleviate negative genetic impacts associated with small, isolated populations, such as low genetic diversity, increased genetic drift, and inbreeding depression (Weeks et al, ).…”

Section: Introductionmentioning

confidence: 99%

Widespread hybridization in the introduced hog deer population of Victoria, Australia, and its implications for conservation

Hill

Linacre

Toop³

et al. 2019

Ecology and Evolution

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In Australia, many species have been introduced that have since undergone drastic declines in their native range. One species of note is the hog deer (Axis porcinus) which was introduced in the 1860s to Victoria, Australia, and has since become endangered in its native range throughout South‐East Asia. There is increased interest in using non‐native populations as a source for genetic rescue; however, considerations need to be made of the genetic suitability of the non‐native population. Three mitochondrial markers and two nuclear markers were sequenced to assess the genetic variation of the Victorian population of hog deer, which identified that the Victorian population has hybrid origins with the closely related chital (Axis axis), a species that is no longer present in the wild in Victoria. In addition, the mitochondrial D‐loop region within the Victorian hog deer is monomorphic, demonstrating that mitochondrial genetic diversity is very low within this population. This study is the first to report of long‐term persistence of hog deer and chital hybrids in a wild setting, and the continual survival of this population suggests that hybrids of these two species are fertile. Despite the newly discovered hybrid status in Victorian hog deer, this population may still be beneficial for future translocations within the native range. However, more in‐depth analysis of genetic diversity within the Victorian hog deer population and investigation of hybridization rates within the native range are necessary before translocations are attempted.

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“…In the marine environment, due to the nature of the medium and modes of organism dispersal, such efforts are much more challenging. However, there are also examples of alien species contributing to the achievement of conservation goals (D'Antonio and Meyerson, 2002;Gozlan, 2008;Gleditsch, 2017), and the existence of endangered species that have alien populations may even create a conservation paradox, in which eradication efforts in the invaded ecosystem are in conflict with efforts to protect the endangered species (Marchetti and Engstrom, 2016).…”

Section: Introductionmentioning

confidence: 99%

Biological Invasions in Conservation Planning: A Global Systematic Review

et al. 2018

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Biological invasions threaten biodiversity in terrestrial, freshwater and marine ecosystems, requiring substantial conservation and management efforts. To examine how the conservation planning literature addresses biological invasions and if planning in the marine environment could benefit from experiences in the freshwater and terrestrial systems, we conducted a global systematic review. Out of 1,149 scientific articles mentioning both "conservation planning" and "alien" or any of its alternative terms, 70 articles met our selection criteria. Most of the studies were related to the terrestrial environment, while only 10% focused on the marine environment. The main conservation targets were species (mostly vertebrates) rather than habitats or ecosystems. Apart from being mentioned, alien species were considered of concern for conservation in only 46% of the cases, while mitigation measures were proposed in only 13% of the cases. The vast majority of the studies (73%) ignored alien species in conservation planning even if their negative impacts were recognized. In 20% of the studies, highly invaded areas were avoided in the planning, while in 6% of the cases such areas were prioritized for conservation. In the latter case, two opposing approaches led to the selection of invaded areas: either alien and native biodiversity were treated equally in setting conservation targets, i.e., alien species were also considered as ecological Mačić et al. Biological Invasions in Conservation Planning features requiring protection, or more commonly invaded sites were prioritized for the implementation of management actions to control or eradicate invasive alien species. When the "avoid" approach was followed, in most of the cases highly impacted areas were either excluded or invasive alien species were included in the estimation of a cost function to be minimized. Most of the studies that followed a "protect" or "avoid" approach dealt with terrestrial or freshwater features but in most cases the followed approach could be transferred to the marine environment. Gaps and needs for further research are discussed and we propose an 11-step framework to account for biological invasions into the systematic conservation planning design.

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The conservation paradox of endangered and invasive species

Cited by 35 publications

References 12 publications

Positive and Negative Impacts of Non-Native Bee Species around the World

Positive and Negative Impacts of Non-Native Bee Species around the World

Widespread hybridization in the introduced hog deer population of Victoria, Australia, and its implications for conservation

Biological Invasions in Conservation Planning: A Global Systematic Review

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