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<jats:p>Standardized tools are needed to identify and prioritize the most harmful non-native species (NNS). A plethora of assessment protocols have been developed to evaluate the current and potential impacts of non-native species, but consistency among them has received limited attention. To estimate the consistency across impact assessment protocols, 89 specialists in biological invasions used 11 protocols to screen 57 NNS (2614 assessments). We tested if the consistency in the impact scoring across assessors, quantified as the coefficient of variation (CV), was dependent on the characteristics of the protocol, the taxonomic group and the expertise of the assessor. Mean CV across assessors was 40%, with a maximum of 223%. CV was lower for protocols with a low number of score levels, which demanded high levels of expertise, and when the assessors had greater expertise on the assessed species. The similarity among protocols with respect to the final scores was higher when the protocols considered the same impact types. We conclude that all protocols led to considerable inconsistency among assessors. In order to improve consistency, we highlight the importance of selecting assessors with high expertise, providing clear guidelines and adequate training but also deriving final decisions collaboratively by consensus.</jats:p>
Keywords
Ecological Modelling, Plant Science, Ecology, Insect Science, Animal Science and Zoology, Aquatic Science, Ecology, Evolution, Behavior and Systematics

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Chicago
González-Moreno, Pablo, Lorenzo Lazzaro, Montserrat Vilà, Cristina Preda, Tim Adriaens, Sven Bacher, Giuseppe Brundu, et al. 2019. “Consistency of Impact Assessment Protocols for Non-native Species.” NeoBiota: 1–25.
APA
González-Moreno, P., Lazzaro, L., Vilà, M., Preda, C., Adriaens, T., Bacher, S., Brundu, G., et al. (2019). Consistency of impact assessment protocols for non-native species. NeoBiota, 1–25.
Vancouver
1.
González-Moreno P, Lazzaro L, Vilà M, Preda C, Adriaens T, Bacher S, et al. Consistency of impact assessment protocols for non-native species. NeoBiota. 2019;1–25.
MLA
González-Moreno, Pablo et al. “Consistency of Impact Assessment Protocols for Non-native Species.” NeoBiota (2019): 1–25. Print.
@article{8623482,
  abstract     = {<jats:p>Standardized tools are needed to identify and prioritize the most harmful non-native species (NNS). A plethora of assessment protocols have been developed to evaluate the current and potential impacts of non-native species, but consistency among them has received limited attention. To estimate the consistency across impact assessment protocols, 89 specialists in biological invasions used 11 protocols to screen 57 NNS (2614 assessments). We tested if the consistency in the impact scoring across assessors, quantified as the coefficient of variation (CV), was dependent on the characteristics of the protocol, the taxonomic group and the expertise of the assessor. Mean CV across assessors was 40%, with a maximum of 223%. CV was lower for protocols with a low number of score levels, which demanded high levels of expertise, and when the assessors had greater expertise on the assessed species. The similarity among protocols with respect to the final scores was higher when the protocols considered the same impact types. We conclude that all protocols led to considerable inconsistency among assessors. In order to improve consistency, we highlight the importance of selecting assessors with high expertise, providing clear guidelines and adequate training but also deriving final decisions collaboratively by consensus.</jats:p>},
  author       = {González-Moreno, Pablo and Lazzaro, Lorenzo and Vilà, Montserrat and Preda, Cristina and Adriaens, Tim and Bacher, Sven and Brundu, Giuseppe and Copp, Gordon H. and Essl, Franz and García-Berthou, Emili and Katsanevakis, Stelios and Moen, Toril Loennechen and Lucy, Frances E. and Nentwig, Wolfgang and Roy, Helen E. and Srėbalienė, Greta and Talgø , Venche and Vanderhoeven, Sonia and Andjelković, Ana and Arbačiauskas, Kęstutis and Auger-Rozenberg, Marie-Anne and Bae, Mi-Jung and Bariche, Michel and Boets, Pieter and Boieiro, Mário and Borges, Paulo Alexandre and Canning-Clode, João and Cardigos, Federico and Chartosia, Niki and Cottier-Cook, Elizabeth Joanne and Crocetta, Fabio and D'hondt, Bram and Foggi, Bruno and Follak, Swen and Gallardo, Belinda and Gammelmo, Øivind and Giakoumi, Sylvaine and Giuliani, Claudia and Guillaume, Fried and Jelaska, Lucija Šerić and Jeschke, Jonathan M. and Jover, Miquel and Juárez-Escario, Alejandro and Kalogirou, Stefanos and Kočić, Aleksandra and Kytinou, Eleni and Laverty, Ciaran and Lozano, Vanessa and Maceda-Veiga, Alberto and Marchante, Elizabete and Marchante, Hélia and Martinou, Angeliki F. and Meyer, Sandro and Minchin, Dan and Montero-Castaño, Ana and Morais, Maria Cristina and Morales-Rodriguez, Carmen and Muhthassim, Naida and Nagy, Zoltán Á. and Ogris, Nikica and Onen, Huseyin and Pergl, Jan and Puntila, Riikka and Rabitsch, Wolfgang and Ramburn, Triya Tessa and Rego, Carla and Reichenbach, Fabian and Romeralo, Carmen and Saul, Wolf-Christian and Schrader, Gritta and Sheehan, Rory and Simonović, Predrag and Skolka, Marius and Soares, António Onofre and Sundheim, Leif and Tarkan, Ali Serhan and Tomov, Rumen and Tricarico, Elena and Tsiamis, Konstantinos and Uludağ, Ahmet and van Valkenburg, Johan and Verreycken, Hugo and Vettraino, Anna Maria and Vilar, Lluís and Wiig, Øystein and Witzell, Johanna and Zanetta, Andrea and Kenis, Marc},
  issn         = {1314-2488},
  journal      = {NeoBiota},
  keywords     = {Ecological Modelling,Plant Science,Ecology,Insect Science,Animal Science and Zoology,Aquatic Science,Ecology,Evolution,Behavior and Systematics},
  pages        = {1--25},
  title        = {Consistency of impact assessment protocols for non-native species},
  url          = {http://dx.doi.org/10.3897/neobiota.44.31650},
  year         = {2019},
}

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