A trait‐based approach for assessing and mapping niche overlap between native and exotic species: the<scp>M</scp>editerranean coastal fish fauna as a case study

Elleouet, JS; Albouy, Camille; Lasram, Frida Ben Rais; Mouillot, David; Leprieur, Fabien

doi:10.1111/ddi.12235

Cited by 27 publications

(28 citation statements)

References 62 publications

(83 reference statements)

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“…Ecological insights into the dynamic of invasion are typically reached by either comparing non‐indigenous species with the indigenous (recipient) community (Belmaker et al ., ; Edelist et al ., ; Azzurro et al ., ; Elleouet et al ., ) or with the communities in their native range (donor community) (Prinzing et al ., ; Belmaker et al ., ; Kalusová et al ., ). Comparison of non‐indigenous species with the recipient community is used to understand how invasion alters the indigenous community and whether the structure of the recipient community influences invasion success (Parker et al ., ; Lockwood et al ., ; Ricciardi et al ., ).…”

Section: Introductionmentioning

confidence: 99%

Trait structure reveals the processes underlying fish establishment in the Mediterranean

Givan

Parravicini

Kulbicki

et al. 2016

Global Ecol. Biogeogr.

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Aim Typically, non‐indigenous species have been studied in relation to either the invaded (recipient) community or the donor community. However, we still lack a broad understanding of the mechanisms underlying the establishment of non‐indigenous species that combines both perspectives. Since the opening of the Suez Canal, hundreds of species have invaded the Mediterranean from the Red Sea, forming a unique system in which the entire species pool (donor, non‐indigenous and recipient) is known. Focusing on species ecological traits, we assess the drivers underlying the establishment of non‐indigenous species from the onset of the invasion to the present. Location The Mediterranean and Red Seas. Methods We compiled traits for shallow‐water hard‐bottom‐associated fishes in the Mediterranean (recipient community) and the Red Sea (donor community). We compared the multivariate community trait structure of non‐indigenous species with the donor and recipient assemblages, using a novel method to objectively assign trait‐weights, thereby increasing the robustness of the results. Patterns were contrasted with two types of null models which provide distinct insights into the ecological processes. Results Non‐indigenous fishes are very diverse ecologically, substantially increasing the total community trait diversity of the Mediterranean. Trait similarity between non‐indigenous and indigenous Mediterranean species was lower than expected, indicating that non‐indigenous fishes tend to occupy relatively vacant niches within the Mediterranean. However, we further found that over time non‐indigenous species display increased trait similarity to indigenous Mediterranean species. This suggests that trait constraints associated with successful establishment are weakening. Main conclusions Non‐indigenous species establish in relatively vacant ecological niches, opening the possibility for predicting establishment using ecological traits. However, the weakening of trait constraints through time suggests that forecasting future establishment may be difficult. Faced with an accelerating pace of invasion, it appears that the Mediterranean is going to be transformed into an extension of the Red Sea in terms of trait and species composition.

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Section: Introductionmentioning

confidence: 99%

Trait structure reveals the processes underlying fish establishment in the Mediterranean

Givan

Parravicini

Kulbicki

et al. 2016

Global Ecol. Biogeogr.

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“…Even though C. limbata and C. multilineata have a similar zooplankton diet (Froese & Pauly, ), the high productivity of south Atlantic waters owing to upwelling and consequent high abundance of plankton (Barua, ), indicates that these species may not be competing for food (Fig. ; Green et al ., ; Elleouet et al ., ; Anderson et al ., ; Chown et al ., ). Schools of C. multilineata and C. limbata feeding together have been observed in the past 2 years at all studied sites.…”

Section: Discussionmentioning

confidence: 99%

“…Stegates spp., Abudefduf saxatilis (L. 1758)]. Shelter for example, may become a limiting resource as their densities in the new environment increase (Green et al, 2012;Elleouet et al, 2014;Chown et al, 2015). So far, however, there has been no evidence of detrimental effects to native species.…”

Section: P Ot E N T I a L C O N S E Q U E N C E Smentioning

confidence: 99%

The recent colonization of south Brazil by the Azores chromis Chromis limbata

Anderson

Salas

Rocha

et al. 2017

Journal of Fish Biology

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The damselfish Chromis limbata is native to the Macaronesian Archipelagos (Azores, Madeira and Canaries) and the western coast of Africa between Senegal and Angola. During the austral summers of 2008 and 2009 the species was recorded for the first time in the south-western Atlantic Ocean around Campeche and Xavier Islands, in Florianópolis, Santa Catarina State, Brazil. Here, the progression of C. limbata in southern Brazilian waters is described using visual counts and genetic surveys and changes in the density of the native congener Chromis multilineata were also investigated. Underwater visual censuses of both Chromis species were carried out from 2009 to 2014. Chromis limbata tissue samples were collected and the mtDNA control region was sequenced and compared with mtDNA haplotypes from the natural range to confirm species identity, compare genetic diversity and to infer connectivity between newly established Brazilian populations. The Brazilian population of C. limbata increased significantly over the past 5 years and the effect on C. multilineata is still an open question, longer time-series data will be necessary to clarify possible interactions. The molecular analyses confirmed species identity, revealed strong haplotype connectivity among Brazilian study sites and showed a low genetic diversity in Brazil when compared with the native populations, suggesting few individuals started the invasion. Four hypotheses could explain this colonizing event: C. limbata was released by aquarium fish keepers; larvae or juveniles were transported via ship ballast water; the species has rafted alongside oil rigs; they crossed the Atlantic Ocean through normal larval dispersal or naturally rafting alongside drifting objects. The rafting hypotheses are favoured, but all four possibilities are plausible and could have happened in combination.

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“…For example, for the same predicted suitability value, we can expect R. pseudoacacia (i.e., with a global environmental and socio‐economic impact score of 20) to have a 10‐fold higher in situ impact than Phytolacca Americana (global impact score of 2). In addition, trait‐based approaches could be used for assessing and mapping potential niche overlap between native and exotic species (Elleouet et al, ). However, those analyses need broad data on species morphological traits which are rare for our selected endemic plant species.…”

Section: Discussionmentioning

confidence: 99%

Areas of high conservation value at risk by plant invaders in Georgia under climate change

Slodowicz

Descombes

Kikodze

et al. 2018

Ecology and Evolution

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Invasive alien plants (IAP) are a threat to biodiversity worldwide. Understanding and anticipating invasions allow for more efficient management. In this regard, predicting potential invasion risks by IAPs is essential to support conservation planning into areas of high conservation value (AHCV) such as sites exhibiting exceptional botanical richness, assemblage of rare, and threatened and/or endemic plant species. Here, we identified AHCV in Georgia, a country showing high plant richness, and assessed the susceptibility of these areas to colonization by IAPs under present and future climatic conditions. We used actual protected areas and areas of high plant endemism (identified using occurrences of 114 Georgian endemic plant species) as proxies for AHCV. Then, we assessed present and future potential distribution of 27 IAPs using species distribution models under four climate change scenarios and stacked single‐species potential distribution into a consensus map representing IAPs richness. We evaluated present and future invasion risks in AHCV using IAPs richness as a metric of susceptibility. We show that the actual protected areas cover only 9.4% of the areas of high plant endemism in Georgia. IAPs are presently located at lower elevations around the large urban centers and in western Georgia. We predict a shift of IAPs toward eastern Georgia and higher altitudes and an increased susceptibility of AHCV to IAPs under future climate change. Our study provides a good baseline for decision makers and stakeholders on where and how resources should be invested in the most efficient way to protect Georgia's high plant richness from IAPs.

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A trait‐based approach for assessing and mapping niche overlap between native and exotic species: theMediterranean coastal fish fauna as a case study

Cited by 27 publications

References 62 publications

Trait structure reveals the processes underlying fish establishment in the Mediterranean

Trait structure reveals the processes underlying fish establishment in the Mediterranean

The recent colonization of south Brazil by the Azores chromis Chromis limbata

Areas of high conservation value at risk by plant invaders in Georgia under climate change

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