Abteilung Systemanalyse, Integrated Assessment und Modellierung

Gegensätzliche Muster und Prozesse der biologischen Invasion in
blauen und grünen Ökosystemen

Photo by igovar from Pexels
Photo by igovar from Pexels


Dieses Projekt leistet einen Beitrag zur Blue Green Biodiversity Research Initiative - einer Eawag-WSL-Kollaboration, die sich auf die Biodiversität an der Schnittstelle von aquatischen und terrestrischen Ökosystemen konzentriert.

Wir vergleichen Invasionen in aquatischen und terrestrischen Ökosystemen primär auf großen (nationalen) räumlichen Skalen und zwischen verschiedenen Taxa auf höherer Ebene (Insekten, Mollusken, Krebstiere, alle wichtigen Wirbeltierklassen und Pflanzen). Wir berechnen das Verhältnis zwischen einheimischer und exotischer Artenvielfalt und testen die Hypothese der biotischen Resistenz, während wir gleichzeitig andere potenzielle Faktoren berücksichtigen, die die Invasivität und Invasivität beeinflussen könnten (z. B. Artmerkmale, Verbreitungsdruck und die Größe von Artenpools).

Team

Dr. Marco Baity Jesi Tel. +41 58 765 5793 E-Mail senden

 

Dr. Agnieszka Senek

Swiss Federal Institute for Forest, Snow and Landscape Research WSL

   

Kontakt

Dr. Marco Baity Jesi Tel. +41 58 765 5793 E-Mail senden

Dr. Eckehard G. Brockerhoff (WSL)

Dr. Agnieszka Sendek (WSL)

Publikationen

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      originalId => protected25765 (integer)
      authors => protected'Sendek, A.; Baity-Jesi, M.; Altermatt, F.; Bader, M.&nbs
         p;K. F.; Liebhold, A. M.; Turner, R. M.; Roques,&nb
         sp;A.; Seebens, H.; Spaak, P.; Vorburger, C.; Brockerhoff,&nb
         sp;E. G.' (241 chars)
      title => protected'Fewer non-native insects in freshwater than in terrestrial habitats across c
         ontinents' (85 chars)
      journal => protected'Diversity and Distributions' (27 chars)
      year => protected2022 (integer)
      volume => protected28 (integer)
      issue => protected'11' (2 chars)
      startpage => protected'2303' (4 chars)
      otherpage => protected'2315' (4 chars)
      categories => protected'aquatic insects; biological invasions; established species; freshwater; inse
         ct invasions; life history traits; pathways; species richness; terrestrial i
         nsects' (158 chars)
      description => protected'<em>Aim:</em> Biological invasions are a major threat to biodiversity in aqu
         atic and terrestrial habitats. Insects represent an important group of speci
         es in freshwater and terrestrial habitats, and they constitute a large propo
         rtion of non-native species. However, while many non-native insects are know
         n from terrestrial ecosystems, they appear to be less represented in freshwa
         ter habitats. Comparisons between freshwater and terrestrial habitats of inv
         ader richness relative to native species richness are scarce, which hinders 
         syntheses of invasion processes. Here, we used data from three regions on di
         fferent continents to determine whether non-native insects are indeed under-
         represented in freshwater compared with terrestrial assemblages.<br /><em>Lo
         cation:</em> Europe, North America, New Zealand.<br /><em>Methods:</em> We c
         ompiled a comprehensive inventory of native and non-native insect species es
         tablished in freshwater and terrestrial habitats of the three study regions.
          We then contrasted the richness of non-native and native species among fres
         hwater and terrestrial insects for all insect orders in each region. Using b
         inomial regression, we analysed the proportions of non-native species in fre
         shwater and terrestrial habitats. Marine insect species were excluded from o
         ur analysis, and insects in low-salinity brackish water were considered as f
         reshwater insects.<br /><em>Results:</em> In most insect orders living in fr
         eshwater, non-native species were under-represented, while they were over-re
         presented in a number of terrestrial orders. This pattern occurred in purely
          aquatic orders and in orders with both freshwater and terrestrial species. 
         Overall, the proportion of non-native species was significantly lower in fre
         shwater than in terrestrial species.<br /><em>Main conclusions:</em> Despite
          the numerical and ecological importance of insects among all non-native spe
         cies, non-native insect species are surprisingly rare in freshwater habitats
         . This is consistent acr...' (2250 chars)
      serialnumber => protected'1366-9516' (9 chars)
      doi => protected'10.1111/ddi.13622' (17 chars)
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Fewer non-native insects in freshwater than in terrestrial habitats across continents

Aim: Biological invasions are a major threat to biodiversity in aquatic and terrestrial habitats. Insects represent an important group of species in freshwater and terrestrial habitats, and they constitute a large proportion of non-native species. However, while many non-native insects are known from terrestrial ecosystems, they appear to be less represented in freshwater habitats. Comparisons between freshwater and terrestrial habitats of invader richness relative to native species richness are scarce, which hinders syntheses of invasion processes. Here, we used data from three regions on different continents to determine whether non-native insects are indeed under-represented in freshwater compared with terrestrial assemblages.
Location: Europe, North America, New Zealand.
Methods: We compiled a comprehensive inventory of native and non-native insect species established in freshwater and terrestrial habitats of the three study regions. We then contrasted the richness of non-native and native species among freshwater and terrestrial insects for all insect orders in each region. Using binomial regression, we analysed the proportions of non-native species in freshwater and terrestrial habitats. Marine insect species were excluded from our analysis, and insects in low-salinity brackish water were considered as freshwater insects.
Results: In most insect orders living in freshwater, non-native species were under-represented, while they were over-represented in a number of terrestrial orders. This pattern occurred in purely aquatic orders and in orders with both freshwater and terrestrial species. Overall, the proportion of non-native species was significantly lower in freshwater than in terrestrial species.
Main conclusions: Despite the numerical and ecological importance of insects among all non-native species, non-native insect species are surprisingly rare in freshwater habitats. This is consistent across the three investigated regions. We review hypotheses concerning species traits and invasion pathways that are most likely to explain these patterns. Our findings contribute to a growing appreciation of drivers and impacts of biological invasions.
Sendek, A.; Baity-Jesi, M.; Altermatt, F.; Bader, M. K. F.; Liebhold, A. M.; Turner, R. M.; Roques, A.; Seebens, H.; Spaak, P.; Vorburger, C.; Brockerhoff, E. G. (2022) Fewer non-native insects in freshwater than in terrestrial habitats across continents, Diversity and Distributions, 28(11), 2303-2315, doi:10.1111/ddi.13622, Institutional Repository