scholarly journals Off to new shores: Climate niche expansion in invasive mosquitofish ( Gambusia spp.)

2021 ◽  
Author(s):  
Jonas Jourdan ◽  
Rüdiger Riesch ◽  
Sarah Cunze
2021 ◽  
Author(s):  
Nicky Lustenhouwer ◽  
Ingrid M. Parker

Ecological niche models have been instrumental in understanding and forecasting the widespread shifts in species distributions under global change. However, growing evidence of evolution in spreading populations challenges their key assumption of niche conservatism, limiting model transferability in space and time. Climate niche evolution has been studied extensively in invasive species, but may also occur in native populations tracking climate change, when species encounter novel abiotic conditions that vary with latitude. We compared niche shifts during native range expansion and during invasion in Dittrichia graveolens, a Mediterranean annual plant species that is currently undergoing both types of spread. We asked whether the species' northward native range expansion in Eurasia matched climate change from 1901-1930 to 1990-2019, or if further range expansion was promoted by niche evolution. In addition, we asked how niche expansion in the native range affected forecasts of two ongoing invasions in Australia and California. We quantified niche shifts in environmental space using the analytical framework of niche centroid shift, overlap, unfilling, and expansion (COUE), and examined associated distribution changes in geographic space using Maximum Entropy modeling. Our results show that D. graveolens expanded its native range well beyond what would be sufficient to track climate change, a shift associated with a 5.5% niche expansion to include more temperate climates. In contrast, both invasions showed evidence of niche conservatism, with niche filling depending on invader residence time. Including the expanded native niche in invasion projections added new areas at risk of invasion, but none of these has been colonized at present. We conclude that native populations may track climate change and adapt to novel local conditions in parallel, causing an evolutionary expansion of the climate niche and more widespread range expansion than expected based on climate change alone.


Author(s):  
Taghi Ghassemi-Khademi ◽  
Rasoul Khosravi ◽  
Saber Sadeghi ◽  
Mehregan Ebrahimi

Diversity ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 155
Author(s):  
Daniel Escoriza ◽  
Félix Amat

South-western Europe has a rich diversity of lacertid lizards. In this study, we evaluated the occupancy patterns and niche segregation of five species of lacertids, focusing on large-bodied species (i.e., adults having >75 mm snout-vent length) that occur in south-western Europe (Italian to the Iberian Peninsula). We characterized the niches occupied by these species based on climate and vegetation cover properties. We expected some commonality among phylogenetically related species, but also patterns of habitat segregation mitigating competition between ecologically equivalent species. We used multivariate ordination and probabilistic methods to describe the occupancy patterns and evaluated niche evolution through phylogenetic analyses. Our results showed climate niche partitioning, but with a wide overlap in transitional zones, where segregation is maintained by species-specific responses to the vegetation cover. The analyses also showed that phylogenetically related species tend to share large parts of their habitat niches. The occurrence of independent evolutionary lineages contributed to the regional species richness favored by a long history of niche divergence.


2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Balázs Szappanos ◽  
Jonathan Fritzemeier ◽  
Bálint Csörgő ◽  
Viktória Lázár ◽  
Xiaowen Lu ◽  
...  

2021 ◽  
Author(s):  
Masaomi Kurokawa ◽  
Issei Nishimura ◽  
Bei-Wen YING

As a central issue in evolution and ecology, the quantitative relationship among the genome, adaptation and the niche was investigated. Local adaptation of five Escherichia coli strains carrying either the wild-type genome or reduced genomes was achieved by experimental evolution. A high-throughput fitness assay of the ancestor and evolved populations across an environmental gradient of eight niches resulted in a total of 80 fitness curves generated from 2,220 growth curves. Further analyses showed that the increases in both local adaptiveness and niche broadness were negatively correlated with genetic richness. Local adaptation caused common niche expansion, whereas niche expansion for generality or speciality was decided by genetic richness. The order of the mutations accumulated stepwise was correlated with the magnitude of the fitness increase attributed to mutation accumulation. Pre-adaptation probably participated in coordination among genetic richness, local adaptation and niche expansion.


PLoS ONE ◽  
2016 ◽  
Vol 11 (4) ◽  
pp. e0152867 ◽  
Author(s):  
Laure Gallien ◽  
Wilfried Thuiller ◽  
Noémie Fort ◽  
Marti Boleda ◽  
Florian J. Alberto ◽  
...  

PLoS ONE ◽  
2010 ◽  
Vol 5 (12) ◽  
pp. e15297 ◽  
Author(s):  
Lisa Mandle ◽  
Dan L. Warren ◽  
Matthias H. Hoffmann ◽  
A. Townsend Peterson ◽  
Johanna Schmitt ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document