Two centuries for an almost complete community turnover from native to non-native species in a riverine ecosystem

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12520%2F21%3A43902509" target="_blank" >RIV/60076658:12520/21:43902509 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1111/gcb.15442" target="_blank" >https://doi.org/10.1111/gcb.15442</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/gcb.15442" target="_blank" >10.1111/gcb.15442</a>

Result language

angličtina

Original language name

Two centuries for an almost complete community turnover from native to non-native species in a riverine ecosystem

Original language description

Non-native species introductions affect freshwater communities by changing community compositions, functional roles, trait occurrences and ecological niche spaces. Reconstructing such changes over long periods is difficult due to limited data availability. We collected information spanning 215 years on fish and selected macroinvertebrate groups (Mollusca and Crustacea) in the inner-Florentine stretch of the Arno River (Italy) and associated water grid, to investigate temporal changes. We identified an almost complete turnover from native to non-native fish (1800: 92% native; 2015: 94% non-native species) and macroinvertebrate species (1800: 100% native; 2015: 70% non-native species). Non-native fish species were observed similar to 50 years earlier compared to macroinvertebrate species, indicating phased invasion processes. In contrast, alpha-diversity of both communities increased significantly following a linear pattern. Separate analyses of changes in alpha-diversities for native and non-native species of both fish and macroinvertebrates were nonlinear. Functional richness and divergence of fish and macroinvertebrate communities decreased non-significantly, as the loss of native species was compensated by non-native species. Introductions of non-native fish and macroinvertebrate species occurred outside the niche space of native species. Native and non-native fish species exhibited greater overlap in niche space over time (62%-68%) and non-native species eventually replaced native species. Native and non-native macroinvertebrate niches overlapped to a lesser extent (15%-30%), with non-natives occupying mostly unoccupied niche space. These temporal changes in niche spaces of both biotic groups are a direct response to the observed changes in alpha-diversity and species turnover. These changes are potentially driven by deteriorations in hydromorphology as indicated by alterations in trait modalities. Additionally, we identified that angling played a considerable role for fish introductions. Our results support previous findings that the community turnover from native to non-native species can be facilitated by, for example, deteriorating environmental conditions and that variations in communities are multifaceted requiring more indicators than single metrics.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10618 - Ecology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Global Change Biology

ISSN

1354-1013

e-ISSN

—

Volume of the periodical

27

Issue of the periodical within the volume

3

Country of publishing house

US - UNITED STATES

Number of pages

18

Pages from-to

606-623

UT code for WoS article

000596762300001

EID of the result in the Scopus database

2-s2.0-85097253847