Asynchronous changes in abundance over large scales are explained by demographic variation rather than environmental stochasticity in an invasive flagellate
Summary Environmental stochasticity is important in explaining the persistence and establishment of invasive species, but the simultaneous effects of environmental and demographic factors are difficult to separate. Understanding how demography and environmental factors affect invasive species abunda...
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crwiley:10.1111/1365-2745.12576 2024-06-02T08:06:33+00:00 Asynchronous changes in abundance over large scales are explained by demographic variation rather than environmental stochasticity in an invasive flagellate Trigal, Cristina Ruete, Alejandro Nilsson, Christer 2016 http://dx.doi.org/10.1111/1365-2745.12576 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2745.12576 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2745.12576 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Ecology volume 104, issue 4, page 947-956 ISSN 0022-0477 1365-2745 journal-article 2016 crwiley https://doi.org/10.1111/1365-2745.12576 2024-05-03T10:55:48Z Summary Environmental stochasticity is important in explaining the persistence and establishment of invasive species, but the simultaneous effects of environmental and demographic factors are difficult to separate. Understanding how demography and environmental factors affect invasive species abundance over large temporal and spatial scales is essential to anticipate populations at risk of becoming established and setting appropriate management measures. Using a hierarchical mixed modelling approach, we analysed the spatial and interannual dynamics of the invasive raphidophyte Gonyostomum semen , a noxious flagellate which is spreading in northern Europe, in response to demographic and environmental variation. We used data from 76 lakes distributed across two biogeographical regions in Sweden (Central Plains in the south and Fennoscandian region in the north) and sampled during 14 years. We found a strong asynchrony in the density dynamics of G. semen populations between the two regions. G. semen showed positive trends (i.e. increasing frequency of high density peaks) in most southern lakes, forming established populations with recurrent blooms in successive years in some of them. In contrast, G. semen populations were smaller and more stochastic in the north. G. semen previous year's abundance, a proxy for cyst production and recruitment, had a strong control on the dynamics, likely contributing to the stability of high density populations in southern lakes. Conversely, the effects of climate and habitat were weaker and their influence varied across regions. Temperature was the limiting factor in the north whereas local habitat was more important in the south. Synthesis . A full understanding of the mechanisms driving abundance changes across large scales can only be gained if endogenous and environmental factors are analysed together. For phytoplankton species, and specially, noxious microalgae, this implies that proxies for cyst production and recruitment, which are the inoculum for next year population, ... Article in Journal/Newspaper Fennoscandian Wiley Online Library Journal of Ecology 104 4 947 956 |
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English |
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Summary Environmental stochasticity is important in explaining the persistence and establishment of invasive species, but the simultaneous effects of environmental and demographic factors are difficult to separate. Understanding how demography and environmental factors affect invasive species abundance over large temporal and spatial scales is essential to anticipate populations at risk of becoming established and setting appropriate management measures. Using a hierarchical mixed modelling approach, we analysed the spatial and interannual dynamics of the invasive raphidophyte Gonyostomum semen , a noxious flagellate which is spreading in northern Europe, in response to demographic and environmental variation. We used data from 76 lakes distributed across two biogeographical regions in Sweden (Central Plains in the south and Fennoscandian region in the north) and sampled during 14 years. We found a strong asynchrony in the density dynamics of G. semen populations between the two regions. G. semen showed positive trends (i.e. increasing frequency of high density peaks) in most southern lakes, forming established populations with recurrent blooms in successive years in some of them. In contrast, G. semen populations were smaller and more stochastic in the north. G. semen previous year's abundance, a proxy for cyst production and recruitment, had a strong control on the dynamics, likely contributing to the stability of high density populations in southern lakes. Conversely, the effects of climate and habitat were weaker and their influence varied across regions. Temperature was the limiting factor in the north whereas local habitat was more important in the south. Synthesis . A full understanding of the mechanisms driving abundance changes across large scales can only be gained if endogenous and environmental factors are analysed together. For phytoplankton species, and specially, noxious microalgae, this implies that proxies for cyst production and recruitment, which are the inoculum for next year population, ... |
author2 |
Nilsson, Christer |
format |
Article in Journal/Newspaper |
author |
Trigal, Cristina Ruete, Alejandro |
spellingShingle |
Trigal, Cristina Ruete, Alejandro Asynchronous changes in abundance over large scales are explained by demographic variation rather than environmental stochasticity in an invasive flagellate |
author_facet |
Trigal, Cristina Ruete, Alejandro |
author_sort |
Trigal, Cristina |
title |
Asynchronous changes in abundance over large scales are explained by demographic variation rather than environmental stochasticity in an invasive flagellate |
title_short |
Asynchronous changes in abundance over large scales are explained by demographic variation rather than environmental stochasticity in an invasive flagellate |
title_full |
Asynchronous changes in abundance over large scales are explained by demographic variation rather than environmental stochasticity in an invasive flagellate |
title_fullStr |
Asynchronous changes in abundance over large scales are explained by demographic variation rather than environmental stochasticity in an invasive flagellate |
title_full_unstemmed |
Asynchronous changes in abundance over large scales are explained by demographic variation rather than environmental stochasticity in an invasive flagellate |
title_sort |
asynchronous changes in abundance over large scales are explained by demographic variation rather than environmental stochasticity in an invasive flagellate |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1111/1365-2745.12576 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2745.12576 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2745.12576 |
genre |
Fennoscandian |
genre_facet |
Fennoscandian |
op_source |
Journal of Ecology volume 104, issue 4, page 947-956 ISSN 0022-0477 1365-2745 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/1365-2745.12576 |
container_title |
Journal of Ecology |
container_volume |
104 |
container_issue |
4 |
container_start_page |
947 |
op_container_end_page |
956 |
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1800751501677690880 |