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Harms NE, Knight IA, DeRossette AB, Williams DA. Intraspecific trait plasticity to N and P of the wetland invader, Alternanthera philoxeroides under flooded conditions. Ecol Evol 2023; 13:e9966. [PMID: 37013102 PMCID: PMC10065980 DOI: 10.1002/ece3.9966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 03/10/2023] [Accepted: 03/15/2023] [Indexed: 04/03/2023] Open
Abstract
Interactions between invaders and resource availability may explain variation in their success or management efficacy. For widespread invaders, regional variation in plant response to nutrients can reflect phenotypic plasticity of the invader, genetic structure of invading populations, or a combination of the two. The wetland weed Alternanthera philoxeroides (alligatorweed) is established throughout the southeastern United States and California and has high genetic diversity despite primarily spreading clonally. Despite its history in the United States, the role of genetic variation for invasion and management success is only now being uncovered. To better understand how nutrients and genotype may influence A. philoxeroides invasion, we measured the response of plants from 26 A. philoxeroides populations (three cp haplotypes) to combinations of nitrogen (4 or 200 mg/L N) and phosphorus (0.4 or 40 mg/L P). We measured productivity (biomass accumulation and allocation), plant architecture (stem diameter and thickness, branching intensity), and foliar traits (toughness, dry matter content, percent N, and percent P). A short‐term developmental assay was also conducted by feeding a subset of plants from the nutrient experiment to the biological control agent Agasicles hygrophila, to determine whether increased availability of N or P to its host influenced agent performance, as has been previously suggested. Alternanthera philoxeroides haplotype Ap1 was more plastic than other haplotypes in response to nutrient amendments, producing more than double the biomass from low to high N and 50%–68% higher shoot: root ratio than other haplotypes in the high N treatment. Alternanthera philoxeroides haplotypes differed in seven of 10 variables in response to increased N. We found no differences in short‐term A. hygrophila development between haplotypes but mass was 23% greater in high than low N treatments. This study is the first to explore the interplay between nutrient availability, genetic variation, and phenotypic plasticity in invasive characteristics of the global invader, A. philoxeroides.
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Affiliation(s)
- Nathan E. Harms
- Aquatic Ecology and Invasive Species BranchUS Army Engineer Research and Development Center201 E. Jones St.LewisvilleTexas75057USA
| | - Ian A. Knight
- Aquatic Ecology and Invasive Species BranchUS Army Engineer Research and Development Center3909 Halls Ferry Rd.VicksburgMississippi39180USA
| | - A. Blake DeRossette
- Aquatic Ecology and Invasive Species BranchUS Army Engineer Research and Development Center3909 Halls Ferry Rd.VicksburgMississippi39180USA
| | - Dean A. Williams
- Department of BiologyTexas Christian UniversityFort WorthTexasUSA
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2
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Impact of Invasive Weeds on the Diversity and Dissimilarity of Bird Communities in Forested Areas. DIVERSITY 2022. [DOI: 10.3390/d14030229] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Caucasian hogweeds, mainly the Sosnowsky’s hogweed Heracleum sosnowskyi and the giant hogweed Heracleum mantegazzianum, create one of the most problematic plant invasions in the world. Due to their large size (weeds reaching 4–5 meters in height), they seem to be herbaceous plants that can threaten birds living in forest stands. This research quantified the structure and diversity of the forest birds’ community in forests with varying areas of invasive hogweeds located in south-eastern Poland. Changes in the accompanying non-forest birds’ community were also assessed. The study addressed the following questions: 1. How does the invaded area correlate with the abundance of forest birds? 2. How do communities and species respond to invaded vegetation? 3. How do the invading plants affect the various types of diversity of forest and non-forest birds? It turned out that both surveyed bird communities had a lower alpha diversity in invaded sites. Only forest birds, not able to change their location easily, formed a unique community (i.e., had a higher beta diversity) near invaders. Forest birds showed unchanged functional diversity based on the relative bird abundance and their connection, or lack of it, with the forest development phases. The effect of hogweeds on the abundance of forest birds was more negative in severely invaded areas with anthropogenic habitats. Non-forest birds showed higher species loss near the invasion, constant beta diversity and decreased functional diversity. This study is important as the forest is a climax community in the temperate zone, and unused open areas become spontaneously overgrown with young forests. Weeds disseminating after crop abandonment can highly and commonly affect forest and non-forest bird communities co-occurring in this type of overgrowing area.
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3
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Rogosch JS, Olden JD. Comparing opportunistic and strategic removal efforts to manage invasive fish species using a dynamic multi‐state occupancy model. J Appl Ecol 2021. [DOI: 10.1111/1365-2664.14012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jane S. Rogosch
- School of Aquatic and Fishery Sciences University of Washington Seattle WA USA
| | - Julian D. Olden
- School of Aquatic and Fishery Sciences University of Washington Seattle WA USA
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4
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Nishimoto M, Miyashita T, Yokomizo H, Matsuda H, Imazu T, Takahashi H, Hasegawa M, Fukasawa K. Spatial optimization of invasive species control informed by management practices. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2021; 31:e02261. [PMID: 33219543 PMCID: PMC8047888 DOI: 10.1002/eap.2261] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 07/28/2020] [Accepted: 08/24/2020] [Indexed: 06/11/2023]
Abstract
Optimization of spatial resource allocation is crucial for the successful control of invasive species under a limited budget but requires labor-intensive surveys to estimate population parameters. In this study, we devised a novel framework for the spatially explicit optimization of capture effort allocation using state-space population models from past capture records. We applied it to a control program for invasive snapping turtles to determine effort allocation strategies that minimize the population density over the whole area. We found that spatially heterogeneous density dependence and capture pressure limit the abundance of snapping turtles. Optimal effort allocation effectively improved the control effect, but the degree of improvement varied substantially depending on the total effort. The degree of improvement by the spatial optimization of allocation effort was only 3.21% when the total effort was maintained at the 2016 level. However, when the total effort was increased by two, four, and eight times, spatial optimization resulted in improvements of 4.65%, 8.33%, and 20.35%, respectively. To achieve the management goal for snapping turtles in our study area, increasing the current total effort by more than four times was necessary, in addition to optimizing the spatial effort. The snapping turtle population is expected to reach the target density one year after the optimal management strategy is implemented, and this rapid response can be explained by high population growth rate coupled with density-dependent feedback regulation. Our results demonstrated that combining a state-space model with optimization makes it possible to adaptively improve the management of invasive species and decision-making. The method used in this study, based on removal records from an invasive management program, can be easily applied to monitoring data for wildlife and pest control management using traps in a variety of ecosystems.
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Affiliation(s)
- Makoto Nishimoto
- Graduate School of Agricultural and Life SciencesUniversity of Tokyo1‐1‐1 Yayoi, Bunkyo‐kuTokyo113‐8657Japan
| | - Tadashi Miyashita
- Graduate School of Agricultural and Life SciencesUniversity of Tokyo1‐1‐1 Yayoi, Bunkyo‐kuTokyo113‐8657Japan
| | - Hiroyuki Yokomizo
- National Institute for Environmental StudiesCenter for Health and Environmental Risk Research16‐2 OnogawaTsukubaIbaraki305‐8506Japan
| | - Hiroyuki Matsuda
- Faculty of Environment and Information SciencesYokohama National University79‐7 Tokiwadai, Hodogaya‐kuYokohama240‐8501Japan
| | - Takeshi Imazu
- Environmental and Community Affairs DepartmentNature Conservation DivisionChiba Biodiversity CenterChiba Prefectural Government 955‐2 Aoba‐cho, Chuo‐kuChiba CityChiba260‐8682Japan
| | - Hiroo Takahashi
- Japan Wildlife Research Center3‐3‐7 Kotobashi, Sumida‐kuTokyo130‐8606Japan
| | - Masami Hasegawa
- Faculty of ScienceToho University2‐2‐1 MiyamaFunabashiChiba274‐8510Japan
| | - Keita Fukasawa
- National Institute for Environmental StudiesCenter for Environmental Biology and Ecosystem Studies16‐2 OnogawaTsukubaIbaraki305‐8506Japan
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5
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The role of competition on invader colonization along stress gradients in the Fuegian steppe. Oecologia 2021; 195:1031-1040. [PMID: 33710449 DOI: 10.1007/s00442-021-04894-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 03/07/2021] [Indexed: 10/21/2022]
Abstract
Competition exerted by native plant communities is an important component of biotic resistance against the spread and impact of non-indigenous plant species in novel habitats. However, how the role of biotic resistance varies along environmental gradients to delay invasions is less clear. We conducted two field experiments to determine how competition from native communities affects colonization of a recognized invader of grasslands, Hieracium pilosella L., in the Fuegian steppe along different environmental gradients at regional and landscape scale. We assessed the role of competition on invader survival and growth along a climate gradient at regional scale (4.7-6.6 °C and 270-450 mm year-1), and across four major plant communities (i.e. meadows, grasslands, scrublands, and heathlands) along a topographic catena. At regional scale, the climate gradient showed a 33% reduction in H. pilosella survival at the coldest and wettest extreme, while reduced its biomass in 41% at the warmest and driest site, in the opposite extreme of the gradient. Competition caused a 34% decrease of the invader biomass, similarly along the climate gradient. At landscape scale, the topographic gradient had a stronger effect on invader survival reaching a 67% reduction in lowland meadows due to flooding events, while competition reduced in 29-39% the invader biomass only in grasslands or scrublands with negligible effects on low-resource heathlands. These results suggest that biotic resistance plays a significant and similar role along the climate gradient to delay invasion at regional scale, but at landscape scale is only determinant for rich-resource communities in absence of abiotic stresses.
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Sjodin BMF, Irvine RL, Ford AT, Howald GR, Russello MA. Rattus population genomics across the Haida Gwaii archipelago provides a framework for guiding invasive species management. Evol Appl 2020; 13:889-904. [PMID: 32431741 PMCID: PMC7232760 DOI: 10.1111/eva.12907] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 11/18/2019] [Accepted: 12/05/2019] [Indexed: 11/29/2022] Open
Abstract
Invasive species have led to precipitous declines in biodiversity, especially in island systems. Brown (Rattus norvegicus) and black rats (R. rattus) are among the most invasive animals on the planet, with eradication being the primary tool for established island populations. The need for increased research for defining eradication units and monitoring outcomes has been highlighted as a means to maximize success. Haida Gwaii is an archipelago ~100 km off the northern coast of British Columbia, Canada, that hosts globally significant breeding populations of seabirds that are at risk due to invasive rats. Here, we paired sampling of brown (n = 287) and black (n = 291) rats across the Haida Gwaii archipelago with genotyping by sequencing (10,770-27,686 SNPs) to investigate patterns of population connectivity and infer levels/direction of gene flow among invasive rat populations in Haida Gwaii. We reconstructed three regional clusters for both species (north, central and south), with proximate populations within regions being largely more related than those that were more distant, consistent with predictions from island biogeography theory. Population assignment of recently detected individuals post-eradication on Faraday, Murchison and the Bischof Islands revealed all were re-invaders from Lyell Island, rather than being on-island survivors. Based on these results, we identified six eradication units constituting single or clusters of islands that would limit the potential for reinvasion, some of which will need to be combined with biosecurity measures. Overall, our results highlight the importance of targeted research prior to conducting eradications and demonstrate a framework for applying population genomics for guiding invasive species management in island systems.
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Affiliation(s)
| | - Robyn L. Irvine
- Gwaii Haanas National Park ReserveNational Marine Conservation Area Reserve and Haida Heritage SiteSkidegateBCCanada
| | - Adam T. Ford
- Department of BiologyUniversity of British ColumbiaKelownaBCCanada
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7
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Gutowsky LF, Romine JG, Heredia NA, Bigelow PE, Parsley MJ, Sandstrom PT, Suski CD, Danylchuk AJ, Cooke SJ, Gresswell RE. Revealing migration and reproductive habitat of invasive fish under an active population suppression program. CONSERVATION SCIENCE AND PRACTICE 2020. [DOI: 10.1111/csp2.119] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Affiliation(s)
- Lee F.G. Gutowsky
- Aquatic Research and Monitoring SectionOntario Ministry of Natural Resources and Forestry Peterborough Ontario Canada
- Department of Biology/Ecology and EvolutionCarleton University Ottawa Ontario Canada
| | - Jason G. Romine
- U.S. Geological Survey, Western Fisheries Research CenterColumbia River Research Laboratory Cook Washington
- U.S. Fish and Wildlife ServiceMid‐Columbia Fish and Wildlife Conservation Office, Yakima Basin Program Yakima Washington
| | | | - Patricia E. Bigelow
- Fisheries and Aquatic Sciences ProgramYellowstone National Park Cooke City‐Silver Gate Wyoming
| | - Michael J. Parsley
- U.S. Geological Survey, Western Fisheries Research CenterColumbia River Research Laboratory Cook Washington
| | | | - Cory D. Suski
- Department of Natural Resources and Environmental SciencesUniversity of Illinois Urbana Illinois
| | - Andy J. Danylchuk
- Department of Environmental ConservationUniversity of Massachusetts Amherst Amherst Massachusetts
- Illinois Natural History SurveyCenter for Aquatic Ecology and Conservation Champaign Illinois
| | - Steven J. Cooke
- Department of Biology/Ecology and EvolutionCarleton University Ottawa Ontario Canada
| | - Robert E. Gresswell
- U.S. Geological Survey, Northern Rocky Mountain Science CenterUniversity Way Bozeman Montana
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8
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Identifying risk factors for persistent versus casual establishment to prioritize rapid response to non-indigenous aquarium fish. Biol Invasions 2020. [DOI: 10.1007/s10530-019-02191-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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9
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Right place. Right time. Right tool: guidance for using target analysis to increase the likelihood of invasive species detection. Biol Invasions 2019. [DOI: 10.1007/s10530-019-02145-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
AbstractIn response to the National Invasive Species Council’s 2016–2018 Management Plan, this paper provides guidance on applying target analysis as part of a comprehensive framework for the early detection of and rapid response to invasive species (EDRR). Target analysis is a strategic approach for detecting one or more invasive species at a specific locality and time, using a particular method and/or technology(ies). Target analyses, which are employed across a wide range of disciplines, are intended to increase the likelihood of detection of a known target in order to maximize survey effectiveness and cost-efficiency. Although target analyses are not yet a standard approach to invasive species management, some federal agencies are employing target analyses in principle and/or in part to improve EDRR capacities. These initiatives can provide a foundation for a more standardized and comprehensive approach to target analyses. Guidance is provided for improving computational information. Federal agencies and their partners would benefit from a concerted effort to collect the information necessary to perform rigorous target analyses and make it available through open access platforms.
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10
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Kang TH, Kim S, Hong KJ, Lee HS. DNA barcoding in quarantine inspection: a case study on quarantine insect monitoring for Lepidoptera obtained through quarantine inspection on foreign vessels. MITOCHONDRIAL DNA PART B-RESOURCES 2018; 4:43-48. [PMID: 33365413 PMCID: PMC7510668 DOI: 10.1080/23802359.2018.1536447] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 09/20/2018] [Indexed: 11/18/2022]
Abstract
We conducted quarantine insect species diversity monitoring using DNA barcoding with 517 lepidopteran samples that were obtained from quarantine inspections of foreign vessels entering Korea. For species delimitation and species identification of the analyzed samples, we applied a 2% cutoff rule. Consequently, 145 (368 samples) were considered taxonomically identified. Therefore the number of samples that were identified to the species level was relatively low, at approximately 71%. Thirty of 145 species were not known in Korea, three, i.e., Noctua pronuba (Noctuidae), Orthosia hibisci (Noctuidae), and Pieris brassicae (Pieridae), were checked as ‘Regulated pests’ in Korea.
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Affiliation(s)
- Tae Hwa Kang
- Bio Control Research Center, Jeonnam Bioindustry Foundation, Gokseong-gun, Korea
| | - Sunam Kim
- Bio Control Research Center, Jeonnam Bioindustry Foundation, Gokseong-gun, Korea
| | - Ki-Jeong Hong
- Department of Plant Medicine, Sunchon National University, Suncheon-si, Korea
| | - Heung Sik Lee
- Plant Quarantine Technology Center, Animal and Plant Quarantine Agency, Gimcheon-si, Korea
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11
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Coulter AA, Brey MK, Lubejko M, Kallis JL, Coulter DP, Glover DC, Whitledge GW, Garvey JE. Multistate models of bigheaded carps in the Illinois River reveal spatial dynamics of invasive species. Biol Invasions 2018. [DOI: 10.1007/s10530-018-1772-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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12
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Januchowski-Hartley SR, Adams VM, Hermoso V. The need for spatially explicit quantification of benefits in invasive-species management. CONSERVATION BIOLOGY : THE JOURNAL OF THE SOCIETY FOR CONSERVATION BIOLOGY 2018; 32:287-293. [PMID: 28940505 DOI: 10.1111/cobi.13031] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Revised: 06/24/2017] [Accepted: 08/04/2017] [Indexed: 06/07/2023]
Abstract
Worldwide, invasive species are a leading driver of environmental change across terrestrial, marine, and freshwater environments and cost billions of dollars annually in ecological damages and economic losses. Resources limit invasive-species control, and planning processes are needed to identify cost-effective solutions. Thus, studies are increasingly considering spatially variable natural and socioeconomic assets (e.g., species persistence, recreational fishing) when planning the allocation of actions for invasive-species management. There is a need to improve understanding of how such assets are considered in invasive-species management. We reviewed over 1600 studies focused on management of invasive species, including flora and fauna. Eighty-four of these studies were included in our final analysis because they focused on the prioritization of actions for invasive species management. Forty-five percent (n = 38) of these studies were based on spatial optimization methods, and 35% (n = 13) accounted for spatially variable assets. Across all 84 optimization studies considered, 27% (n = 23) explicitly accounted for spatially variable assets. Based on our findings, we further explored the potential costs and benefits to invasive species management when spatially variable assets are explicitly considered or not. To include spatially variable assets in decision-making processes that guide invasive-species management there is a need to quantify environmental responses to invasive species and to enhance understanding of potential impacts of invasive species on different natural or socioeconomic assets. We suggest these gaps could be filled by systematic reviews, quantifying invasive species impacts on native species at different periods, and broadening sources and enhancing sharing of knowledge.
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Affiliation(s)
- Stephanie R Januchowski-Hartley
- Laboratoire Evolution et Diversité Biologique, UMR 5174, Université Paul Sabatier, Bat. 4R1, 118 route de Narbonne, 31062 Toulouse cedex 4, France
| | - Vanessa M Adams
- School of Biological Sciences, Faculty of Science, University of Queensland, Brisbane St Lucia, QLD 4072, Australia
- Macquarie University Department of Biological Sciences, North Ryde, NSW, Australia
| | - Virgilio Hermoso
- Centre Tecnològic Forestal de Catalunya, Crta. Sant Llorenç de Morunys, Solsona, Lleida, Spain
- Australian Rivers Institute, Griffith University, Kessels Road, 4111 Nathan, QLD, Australia
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13
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Humphreys JM, Elsner JB, Jagger TH, Pau S. A Bayesian geostatistical approach to modeling global distributions of Lygodium microphyllum under projected climate warming. Ecol Modell 2017. [DOI: 10.1016/j.ecolmodel.2017.09.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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14
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Reynolds C, Cumming GS, Vilà M, Green AJ. Birds as key vectors for the dispersal of some alien species: Further thoughts. DIVERS DISTRIB 2017. [DOI: 10.1111/ddi.12549] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Affiliation(s)
- Chevonne Reynolds
- Percy FitzPatrick Institute of African Ornithology (PFIAO); DST/NRF Centre of Excellence; University of Cape Town; Rondebosch Cape Town South Africa
- Statistics in Ecology, Environment and Conservation; Department of Statistical Sciences; University of Cape Town; Rondebosch South Africa
| | - Graeme S. Cumming
- Percy FitzPatrick Institute of African Ornithology (PFIAO); DST/NRF Centre of Excellence; University of Cape Town; Rondebosch Cape Town South Africa
- ARC Centre of Excellence for Coral Reef Studies; James Cook University; Townsville QLD Australia
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15
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Kerr NZ, Baxter PWJ, Salguero-Gómez R, Wardle GM, Buckley YM. Prioritizing management actions for invasive populations using cost, efficacy, demography and expert opinion for 14 plant species world-wide. J Appl Ecol 2016; 53:305-316. [PMID: 27478205 PMCID: PMC4949517 DOI: 10.1111/1365-2664.12592] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 12/01/2015] [Indexed: 11/30/2022]
Abstract
Management of invasive populations is typically investigated case-by-case. Comparative approaches have been applied to single aspects of management, such as demography, with cost or efficacy rarely incorporated.We present an analysis of the ranks of management actions for 14 species in five countries that extends beyond the use of demography alone to include multiple metrics for ranking management actions, which integrate cost, efficacy and demography (cost-effectiveness) and managers' expert opinion of ranks. We use content analysis of manager surveys to assess the multiple criteria managers use to rank management strategies.Analysis of the matrix models for managed populations showed that all management actions led to reductions in population growth rate (λ), with a median 48% reduction in λ across all management units; however, only 66% of the actions led to declining populations (λ < 1).Each management action ranked by cost-effectiveness and cost had a unique rank; however, elasticity ranks were often tied, providing less discrimination among management actions. Ranking management actions by cost alone aligned well with cost-effectiveness ranks and demographic elasticity ranks were also well aligned with cost-effectiveness. In contrast, efficacy ranks were aligned with managers' ranks and managers identified efficacy and demography as important. 80% of managers identified off-target effects of management as important, which was not captured using any of the other metrics. Synthesis and applications. A multidimensional view of the benefits and costs of management options provides a range of single and integrated metrics. These rankings, and the relationships between them, can be used to assess management actions for invasive plants. The integrated cost-effectiveness approach goes well 'beyond demography' and provides additional information for managers; however, cost-effectiveness needs to be augmented with information on off-target effects and social impacts of management in order to provide greater benefits for on-the-ground management.
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Affiliation(s)
- Natalie Z Kerr
- ARC Centre of Excellence for Environmental Decisions School of Biological Sciences The University of Queensland St Lucia QLD4072 Australia; Department of Biology Tufts University Medford Massachusetts 02155 USA
| | - Peter W J Baxter
- Centre for Applications in Natural Resource Mathematics School of Mathematics and Physics The University of Queensland St Lucia QLD4072 Australia; Present address: Earth, Environmental and Biological Sciences School Queensland University of Technology Brisbane QLD4000 Australia
| | - Roberto Salguero-Gómez
- ARC Centre of Excellence for Environmental Decisions School of Biological Sciences The University of Queensland St Lucia QLD4072 Australia; Evolutionary Biodemography Laboratory Max Planck Institute for Demographic Research Konrad-Zuse-Straße 1 Rostock DE-18057 Germany
| | - Glenda M Wardle
- Desert Ecology Research Group School of Biological Sciences University of Sydney NSW 2006 Australia
| | - Yvonne M Buckley
- ARC Centre of Excellence for Environmental Decisions School of Biological Sciences The University of Queensland St Lucia QLD4072 Australia; School of Natural Sciences Trinity Centre for Biodiversity Research, Zoology Trinity College Dublin The University of Dublin Dublin 2 Ireland
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16
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van Klinken RD, Pichancourt JB. Population-level consequences of herbivory, changing climate, and source-sink dynamics on a long-lived invasive shrub. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2015; 25:2255-2270. [PMID: 26910953 DOI: 10.1890/14-2202.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Long-lived plant species are highly valued environmentally, economically, and socially, but can also cause substantial harm as invaders. Realistic demographic predictions can guide management decisions, and are particularly valuable for long-lived species where population response times can be long. Long-lived species are also challenging, given population dynamics can be affected by factors as diverse as herbivory, climate, and dispersal. We developed a matrix model to evaluate the effects of herbivory by a leaf-feeding biological control agent released in Australia against a long-lived invasive shrub (mesquite, Leguminoseae: Prosopis spp.). The stage-structured, density-dependent model used an annual time step and 10 climatically diverse years of field data. Mesquite population demography is sensitive to source-sink dynamics as most seeds are consumed and redistributed spatially by livestock. In addition, individual mesquite plants, because they are long lived, experience natural climate variation that cycles over decadal scales, as well as anthropogenic climate change. The model therefore explicitly considered the effects of both net dispersal and climate variation. Herbivory strongly regulated mesquite populations through reduced growth and fertility, but additional mortality of older plants will be required to reach management goals within a reasonable time frame. Growth and survival of seeds and seedlings were correlated with daily soil moisture. As a result, population dynamics were sensitive to rainfall scenario, but population response times were typically slow (20-800 years to reach equilibrium or extinction) due to adult longevity. Equilibrium population densities were expected to remain 5% higher, and be more dynamic, if historical multi-decadal climate patterns persist, the effect being dampened by herbivory suppressing seed production irrespective of preceding rainfall. Dense infestations were unlikely to form under a drier climate, and required net dispersal under the current climate. Seed input wasn't required to form dense infestations under a wetter climate. Each factor we considered (ongoing herbivory, changing climate, and source-sink dynamics) has a strong bearing on how this invasive species should be managed, highlighting the need for considering both ecological context (in this case, source-sink dynamics) and the effect of climate variability at relevant temporal scales (daily, multi-decadal, and anthropogenic) when deriving management recommendations for long-lived species.
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17
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Hoffmann BD. Integrating biology into invasive species management is a key principle for eradication success: the case of yellow crazy ant Anoplolepis gracilipes in northern Australia. BULLETIN OF ENTOMOLOGICAL RESEARCH 2015; 105:141-151. [PMID: 25212433 DOI: 10.1017/s0007485314000662] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The lack of biological knowledge of many invasive species remains as one of the greatest impediments to their management. Here I detail targeted research into the biology of the yellow crazy ant Anoplolepis gracilipes within northern Australia and detail how such knowledge can be used to improve the management outcomes for this species. I quantified nest location and density in three habitats, worker activity over 24 h, infestation expansion rate, seasonal variation of worker abundance and the timing of production of sexuals. Nests were predominantly (up to 68%) located at the bases of large trees, indicating that search efforts should focus around tree bases. Nest density was one nest per 22, 7.1 and 6.3 m2 in the three habitats, respectively. These data form the baselines for quantifying treatment efficacy and set sampling densities for post-treatment assessments. Most (60%) nests were underground, predominantly (89%) occurring in an open area rather than underneath a rock or log. Some seasonality was evident for nests within leaf litter, with most (83%) occurring during the 'wet season' (October-March). Of the underground nests, most were shallow, with 44% being less than 10 cm deep, and 67% being less than 20 cm deep. Such nest location and density information serves many management purposes, for improving detection, mapping and post-treatment assessments, and also provided strong evidence that carbohydrate supply was a major driver of A. gracilipes populations. Just over half of the nests (56%) contained queens. Of the 62 underground nests containing queens, most queens (80%) were located at the deepest chamber. When queens were present, most often (38%) only one queen was present, the most being 16. Queen number per nest was the lowest in July and August just prior to the emergence of virgin queens in September, with queen numbers then remaining steadily high until April. Nothing is known for any ant species about how the queen number per nest/colony affects treatment efficacy, but further research would no doubt yield important breakthroughs for treating ants. Activity occurred predominantly nocturnally, ceasing during mid-day. These activity data determined the critical threshold above which work must be conducted to be considered reliable, and also suggests that treatments are best applied in the afternoon. Total brood production peaked in February and was the lowest around August and September. These abundance data form the baselines for quantifying treatment efficacy, and may have implications for treatment efficacy. Males were found every month, predominantly between August and November. Queen pupae were found in September. The reproductive timing of sexuals determines the treatment schedule. Targeted, site-specific research such as that described here should be an integral part of any eradication program for invasive species to design knowledge-based treatment protocols and determine assessment benchmarks.
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Affiliation(s)
- B D Hoffmann
- CSIRO,Tropical Ecosystems Research Centre,PMB 44 Winnellie NT 0822,Australia
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Lindenmayer DB, Burns EL, Tennant P, Dickman CR, Green PT, Keith DA, Metcalfe DJ, Russell-Smith J, Wardle GM, Williams D, Bossard K, deLacey C, Hanigan I, Bull CM, Gillespie G, Hobbs RJ, Krebs CJ, Likens GE, Porter J, Vardon M. Contemplating the future: Acting now on long-term monitoring to answer 2050's questions. AUSTRAL ECOL 2015. [DOI: 10.1111/aec.12207] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- David B. Lindenmayer
- Long Term Ecological Research Network; Terrestrial Ecosystem Research Network; Australia
- Fenner School of Environment and Society; The Australian National University; Canberra Australian Capital Territory
| | - Emma L. Burns
- Long Term Ecological Research Network; Terrestrial Ecosystem Research Network; Australia
- Fenner School of Environment and Society; The Australian National University; Canberra Australian Capital Territory
| | - Philip Tennant
- Long Term Ecological Research Network; Terrestrial Ecosystem Research Network; Australia
- Fenner School of Environment and Society; The Australian National University; Canberra Australian Capital Territory
| | - Chris R. Dickman
- Long Term Ecological Research Network; Terrestrial Ecosystem Research Network; Australia
- Desert Ecology Research Group, School of Biological Sciences; The University of Sydney; Sydney New South Wales
| | - Peter T. Green
- Long Term Ecological Research Network; Terrestrial Ecosystem Research Network; Australia
- Department of Ecology, Environment and Evolution; La Trobe University; Melbourne Victoria
| | - David A. Keith
- Long Term Ecological Research Network; Terrestrial Ecosystem Research Network; Australia
- School of Biological, Earth and Environmental Sciences; The University of New South Wales; Sydney New South Wales
| | - Daniel J. Metcalfe
- Long Term Ecological Research Network; Terrestrial Ecosystem Research Network; Australia
- CSIRO Land and Water Flagship; Dutton Park Queensland
| | - Jeremy Russell-Smith
- Long Term Ecological Research Network; Terrestrial Ecosystem Research Network; Australia
- Darwin Centre for Bushfire Research; Charles Darwin University; Darwin Northern Territory
| | - Glenda M. Wardle
- Long Term Ecological Research Network; Terrestrial Ecosystem Research Network; Australia
- Desert Ecology Research Group, School of Biological Sciences; The University of Sydney; Sydney New South Wales
| | - Dick Williams
- Long Term Ecological Research Network; Terrestrial Ecosystem Research Network; Australia
- Sustainable Ecosystems; CSIRO Ecosystem Sciences; Winnellie Northern Territory
| | - Karl Bossard
- Long Term Ecological Research Network; Terrestrial Ecosystem Research Network; Australia
- Fenner School of Environment and Society; The Australian National University; Canberra Australian Capital Territory
| | - Claire deLacey
- Long Term Ecological Research Network; Terrestrial Ecosystem Research Network; Australia
- Fenner School of Environment and Society; The Australian National University; Canberra Australian Capital Territory
| | - Ivan Hanigan
- Long Term Ecological Research Network; Terrestrial Ecosystem Research Network; Australia
- Fenner School of Environment and Society; The Australian National University; Canberra Australian Capital Territory
| | - C. Michael Bull
- School of Biological Sciences; Flinders University; Adelaide South Australia
| | - Graeme Gillespie
- Long Term Ecological Research Network; Terrestrial Ecosystem Research Network; Australia
- Department of Land Resource Management; Flora and Fauna Division, Berrimah; Northern Territory
| | - Richard J. Hobbs
- School of Plant Biology and ARC Centre of Excellence for Environmental Decisions; University of Western Australia; Crawley Western Australia
| | - Charles J. Krebs
- Institute for Applied Ecology; University of Canberra; Canberra Australian Capital Territory
| | - Gene E. Likens
- Cary Institute of Ecosystem Studies; Millbrook, New York USA
- Department of Ecology and Environmental Biology; University of Connecticut; Storrs, Connecticut USA
| | - John Porter
- Department of Environmental Sciences; University of Virginia; Charlottesville Virginia USA
| | - Michael Vardon
- Fenner School of Environment and Society; The Australian National University; Canberra Australian Capital Territory
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Distribution, spread and habitat preferences of nutria (Myocastor coypus) invading the lower Nakdong River, South Korea. Biol Invasions 2014. [DOI: 10.1007/s10530-014-0809-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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20
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Lampert A, Hastings A, Grosholz ED, Jardine SL, Sanchirico JN. Optimal approaches for balancing invasive species eradication and endangered species management. Science 2014; 344:1028-31. [DOI: 10.1126/science.1250763] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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21
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Wallace JM, Prather TS. Comparative demography of an exotic herbaceous annual among plant communities in invaded canyon grassland: inferences for habitat suitability and population spread. Biol Invasions 2013. [DOI: 10.1007/s10530-013-0493-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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22
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Kuebbing SE, Classen AT, Simberloff D. Two co-occurring invasive woody shrubs alter soil properties and promote subdominant invasive species. J Appl Ecol 2013. [DOI: 10.1111/1365-2664.12161] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sara E. Kuebbing
- Department of Ecology and Evolutionary Biology; University of Tennessee; Knoxville TN USA
| | - Aimée T. Classen
- Department of Ecology and Evolutionary Biology; University of Tennessee; Knoxville TN USA
| | - Daniel Simberloff
- Department of Ecology and Evolutionary Biology; University of Tennessee; Knoxville TN USA
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23
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Emery SM, Doran PJ, Legge JT, Kleitch M, Howard S. Aboveground and Belowground Impacts Following Removal of the Invasive Species Baby's Breath (Gypsophila paniculata) on Lake Michigan Sand Dunes. Restor Ecol 2012. [DOI: 10.1111/j.1526-100x.2012.00915.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Sarah M. Emery
- Department of Biology; University of Louisville; Louisville; KY; 40292; U.S.A
| | | | - John T. Legge
- The Nature Conservancy in Michigan; Lansing; MI; 48906; U.S.A
| | - Matthew Kleitch
- The Nature Conservancy in Michigan; Lansing; MI; 48906; U.S.A
| | - Shaun Howard
- The Nature Conservancy in Michigan; Lansing; MI; 48906; U.S.A
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25
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Hogg BN, Daane KM. Contrasting landscape effects on species diversity and invasion success within a predator community. DIVERS DISTRIB 2012. [DOI: 10.1111/j.1472-4642.2012.00935.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Affiliation(s)
- Brian N. Hogg
- Department of Environmental Science Policy and Management; University of California; Berkeley; CA; 94720-3114; USA
| | - Kent M. Daane
- Department of Environmental Science Policy and Management; University of California; Berkeley; CA; 94720-3114; USA
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26
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Gaertner M, Fisher J, Sharma G, Esler K. Insights into invasion and restoration ecology: Time to collaborate towards a holistic approach to tackle biological invasions. NEOBIOTA 2012. [DOI: 10.3897/neobiota.12.2123] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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27
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Grice AC, Friedel MH, Marshall NA, Van Klinken RD. Tackling contentious invasive plant species: a case study of buffel grass in Australia. ENVIRONMENTAL MANAGEMENT 2012; 49:285-294. [PMID: 22057697 DOI: 10.1007/s00267-011-9781-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Accepted: 10/18/2011] [Indexed: 05/31/2023]
Abstract
Introduced plants that have both production values and negative impacts can be contentious. Generally they are either treated as weeds and their use prohibited; or unfettered exploitation is permitted and land managers must individually contend with any negative effects. Buffel grass (Cenchrus ciliaris) is contentious in Australia and there has been no attempt to broadly and systematically address the issues surrounding it. However, recent research indicates that there is some mutual acceptance by proponents and opponents of each others' perspectives and we contend that this provides the basis for a national approach. It would require thorough and on-going consultation with stakeholders and development of realistic goals that are applicable across a range of scales and responsive to regional differences in costs, benefits and socio-economic and biophysical circumstances. It would be necessary to clearly allocate responsibilities and ascertain the most appropriate balance between legislative and non-legislative mechanisms. A national approach could involve avoiding the introduction of additional genetic material, countering proliferation in regions where the species is sparse, preventing incursion into conservation reserves where it is absent, containing strategically located populations and managing communities to prevent or reduce dominance by buffel grass. This approach could be applied to other contentious plant species.
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Affiliation(s)
- Anthony C Grice
- CSIRO, Ecosystem Sciences, Private Bag PO Aitkenvale, Townsville, QLD, 4814, Australia.
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28
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Smith C, van Klinken RD, Seabrook L, McAlpine C. Estimating the influence of land management change on weed invasion potential using expert knowledge. DIVERS DISTRIB 2011. [DOI: 10.1111/j.1472-4642.2011.00871.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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29
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Papeş M, Sällström M, Asplund TR, Vander Zanden MJ. Invasive species research to meet the needs of resource management and planning. CONSERVATION BIOLOGY : THE JOURNAL OF THE SOCIETY FOR CONSERVATION BIOLOGY 2011; 25:867-872. [PMID: 21790786 DOI: 10.1111/j.1523-1739.2011.01714.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
As zebra mussels (Dreissena polymorpha) continue to spread among inland lakes of the United States and Canada, there is growing interest from professionals, citizens, and other stakeholders to know which lakes are likely to be colonized by zebra mussels. Thus, we developed a classification of lake suitability for zebra mussels on the basis of measured or estimated concentrations of dissolved calcium in lake water and applied the classification to >11,500 lakes in Wisconsin and the Upper Peninsula of Michigan. The majority of lakes (58%) were classified as unsuitable (<10 mg/L Ca) for survival and reproduction of zebra mussels, 27% were identified as suitable (≥21 mg/L Ca), and 15% were classified as borderline suitable (≥10 and <21 mg/L Ca). Of the 77 inland lakes with confirmed zebra mussel records for which data on dissolved calcium were available, our method classified 74 as suitable and 3 as borderline suitable. To communicate this lake-specific suitability information and to help prioritize regional efforts to monitor and prevent the expansion of zebra mussels and other invasive species, we developed a web-based interface (available from http://www.aissmartprevention.wisc.edu/). Although we are still uncertain of how access to suitability information ultimately affects decision making, we believe this is a useful case study of building communication channels among researchers, practitioners, and the public.
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Affiliation(s)
- M Papeş
- Center for Limnology, University of Wisconsin-Madison, 680 N. Park St., Madison, WI 53706, USA.
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30
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te Beest M, Cromsigt JPGM, Ngobese J, Olff H. Managing invasions at the cost of native habitat? An experimental test of the impact of fire on the invasion of Chromolaena odorata in a South African savanna. Biol Invasions 2011. [DOI: 10.1007/s10530-011-0102-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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31
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Le Maitre DC, Gaertner M, Marchante E, Ens EJ, Holmes PM, Pauchard A, O’Farrell PJ, Rogers AM, Blanchard R, Blignaut J, Richardson DM. Impacts of invasive Australian acacias: implications for management and restoration. DIVERS DISTRIB 2011. [DOI: 10.1111/j.1472-4642.2011.00816.x] [Citation(s) in RCA: 261] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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32
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Catford JA, Downes BJ, Gippel CJ, Vesk PA. Flow regulation reduces native plant cover and facilitates exotic invasion in riparian wetlands. J Appl Ecol 2011. [DOI: 10.1111/j.1365-2664.2010.01945.x] [Citation(s) in RCA: 139] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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33
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BUTCHER ELLENR, KELLY DAVE. Physical and anthropogenic factors predict distribution of the invasive weed Tradescantia fluminensis. AUSTRAL ECOL 2010. [DOI: 10.1111/j.1442-9993.2010.02196.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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34
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Raymond B, McInnes J, Dambacher JM, Way S, Bergstrom DM. Qualitative modelling of invasive species eradication on subantarctic Macquarie Island. J Appl Ecol 2010. [DOI: 10.1111/j.1365-2664.2010.01916.x] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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35
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Regan TJ, Chadès I, Possingham HP. Optimally managing under imperfect detection: a method for plant invasions. J Appl Ecol 2010. [DOI: 10.1111/j.1365-2664.2010.01915.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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36
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Mutze G, Kovaliski J, Butler K, Capucci L, McPhee S. The effect of rabbit population control programmes on the impact of rabbit haemorrhagic disease in south-eastern Australia. J Appl Ecol 2010. [DOI: 10.1111/j.1365-2664.2010.01844.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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37
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Heleno R, Lacerda I, Ramos JA, Memmott J. Evaluation of restoration effectiveness: community response to the removal of alien plants. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2010; 20:1191-1203. [PMID: 20666243 DOI: 10.1890/09-1384.1] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Plant invasions are a key cause of biodiversity loss and motivate many restoration programs worldwide. We assessed restoration success of an invaded forest in the Azores using two complementary experimental designs: a before-after control-impact (BACI) design compared a restored and a control (unmanipulated) site over three years, while a control-impact (CI) design evaluated the short-term effects of restoration on restored-control replicated pairs. In both designs, a food web approach was used to evaluate both structural and functional aspects of the restoration. Two years after removing alien plants from the BACI design, there were increases in the abundance of native seeds (110%), herbivorous insects (85%), insect parasitoids (5%), and birds (7%) in the experimental plot compared to the unmanipulated plot. In the CI design, five experimental plots were weeded and paired with five adjacent unmanipulated plots. Immediately following the removal of alien plants within the experimental plots, there was a significant decrease in native plant species, likely attributed to the effect of disturbance. Nevertheless, the production of native seeds increased by 35% in year 1, and seed production of the focal endemic plant, Ilex perado (holly), increased 159% in year 2. Weeding increased the survivorship and growth of seedlings transplanted into the plots, particularly those of alien species. Both experiments provide evidence of the positive effects of weeding cascading through the food web from native plants to herbivorous insects, insect parasitoids, and birds. Two aspects that could prove critical to the outcome of restoration programs deserve further attention: most bird-dispersed seeds were alien, and weeding favored alien over native seedling growth.
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Affiliation(s)
- Ruben Heleno
- School of Biological Sciences, University of Bristol, Bristol BS8 1UG, United Kingdom
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38
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Gutierrez AP, Mills NJ, Ponti L. Limits to the potential distribution of light brown apple moth in Arizona–California based on climate suitability and host plant availability. Biol Invasions 2010. [DOI: 10.1007/s10530-010-9725-8] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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39
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Catford JA, Downes BJ. Using multi-scale species distribution data to infer drivers of biological invasion in riparian wetlands. DIVERS DISTRIB 2010. [DOI: 10.1111/j.1472-4642.2009.00631.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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40
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Lee JE, Chown SL. Breaching the dispersal barrier to invasion: quantification and management. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2009; 19:1944-1959. [PMID: 19831082 DOI: 10.1890/08-2157.1] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Globalization has resulted in unprecedented movements of people, goods, and alien species across the planet. Although the impacts of biological invasions are widely appreciated, a bias exists in research effort to post-dispersal processes because of the difficulties of measuring propagule pressure. The Antarctic provides an ideal model system in which to investigate propagule movements because of the region's isolation and small number of entry routes. Here we investigated the logistics operations of the South African National Antarctic Programme (SANAP) and quantified the initial dispersal of alien species into the region. We found that over 1400 seeds from 99 taxa are transported into the Antarctic each field season in association with SANAP passenger luggage and cargo. The first ever assessment of propagule drop-off indicated that 30-50% of these propagules will enter the recipient environment. Many of the taxa include cosmopolitan weeds and known aliens in the Antarctic, indicating that logistics operations form part of a globally self-perpetuating cycle moving alien species between areas of human disturbance. In addition, propagules of some taxa native to the Antarctic region were also found, suggesting that human movements may be facilitating intra-regional homogenization. Several relatively simple changes in biosecurity policy that could significantly reduce the threat of introduction of nonnative species are suggested.
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Affiliation(s)
- Jennifer E Lee
- Centre for Invasion Biology, Department of Botany and Zoology, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa.
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41
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Fox JC, Buckley YM, Panetta FD, Bourgoin J, Pullar D. Surveillance protocols for management of invasive plants: modelling Chilean needle grass (Nassella neesiana) in Australia. DIVERS DISTRIB 2009. [DOI: 10.1111/j.1472-4642.2009.00562.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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42
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Yokomizo H, Possingham HP, Thomas MB, Buckley YM. Managing the impact of invasive species: the value of knowing the density-impact curve. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2009; 19:376-386. [PMID: 19323196 DOI: 10.1890/08-0442.1] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Economic impacts of invasive species worldwide are substantial. Management strategies have been incorporated in population models to assess the effectiveness of management for reducing density, with the implicit assumption that economic impact of the invasive species will also decline. The optimal management effort, however, is that which minimizes the sum of both the management and impact costs. The relationship between population density and economic impact (what we call the "density-impact curve") is rarely examined in a management context and could take several nonlinear forms. Here we determine the effects of population dynamics and density-impact curves of different shapes on optimal management effort and discover cases where management is either highly effective or a waste of resources. When an inaccurate density-impact curve is used, the increase in total costs due to over- or underinvestment in management can be large. We calculate the increase in total costs incurred if the density-impact curve is incorrect and find that the greater the maximum impact caused by an invasive species, the more important it is not only to reduce its density, but also to know the shape of the density-impact relationship accurately. Lack of information regarding the relationship between density and economic impact causes the most acute problems for invaders that cause high impact at low density, where management typically will be too little, too late. For species that are only problematic at high density, ignorance of the density-impact curve can lead to overinvestment in management with little reduction in impact.
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Affiliation(s)
- Hiroyuki Yokomizo
- CSIRO Sustainable Ecosystems, 306 Carmody Road, St. Lucia, Queensland 4067, Australia.
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44
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Brown KA, Spector S, Wu W. Multi-scale analysis of species introductions: combining landscape and demographic models to improve management decisions about non-native species. J Appl Ecol 2008. [DOI: 10.1111/j.1365-2664.2008.01550.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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45
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Standish RJ, Cramer VA, Hobbs RJ. Land-use legacy and the persistence of invasiveAvena barbataon abandoned farmland. J Appl Ecol 2008. [DOI: 10.1111/j.1365-2664.2008.01558.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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46
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Firn J, Rout T, Possingham H, Buckley YM. Managing beyond the invader: manipulating disturbance of natives simplifies control efforts. J Appl Ecol 2008. [DOI: 10.1111/j.1365-2664.2008.01510.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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47
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