scholarly journals Evidence of ecological niche shift in Rhododendron ponticum (L.) in Britain: Hybridization as a possible cause of rapid niche expansion

2020 ◽  
Vol 10 (4) ◽  
pp. 2040-2050 ◽  
Author(s):  
Syed Amir Manzoor ◽  
Geoffrey Griffiths ◽  
Maxwell C. Obiakara ◽  
Citlalli Edith Esparza‐Estrada ◽  
Martin Lukac
Keyword(s):  
Ecological Niche ◽  
Niche Shift ◽  
Niche Expansion ◽  
Rhododendron Ponticum ◽  
Possible Cause

scholarly journals An ecological niche shift for Neanderthal populations in Western Europe 70,000 years ago

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
William E. Banks ◽  
Marie-Hélène Moncel ◽  
Jean-Paul Raynal ◽  
Marlon E. Cobos ◽  
Daniel Romero-Alvarez ◽  
...  
Keyword(s):  
Material Culture ◽  
Ecological Niche ◽  
Western Europe ◽  
Ecological Niche Modeling ◽  
Climatic Variability ◽  
Niche Shift ◽  
Ecological Niches ◽  
Middle Paleolithic ◽  
Niche Dynamics ◽  
Anatomically Modern Humans

AbstractMiddle Paleolithic Neanderthal populations occupied Eurasia for at least 250,000 years prior to the arrival of anatomically modern humans. While a considerable body of archaeological research has focused on Neanderthal material culture and subsistence strategies, little attention has been paid to the relationship between regionally specific cultural trajectories and their associated existing fundamental ecological niches, nor to how the latter varied across periods of climatic variability. We examine the Middle Paleolithic archaeological record of a naturally constrained region of Western Europe between 82,000 and 60,000 years ago using ecological niche modeling methods. Evaluations of ecological niche estimations, in both geographic and environmental dimensions, indicate that 70,000 years ago the range of suitable habitats exploited by these Neanderthal populations contracted and shifted. These ecological niche dynamics are the result of groups continuing to occupy habitual territories that were characterized by new environmental conditions during Marine Isotope Stage 4. The development of original cultural adaptations permitted this territorial stability.

Dietary niche expansion and niche shift in native marble trout (Salmo marmoratus) living in sympatry with introduced rainbow trout (Oncorhynchus mykiss)

2017 ◽  
Vol 27 (3) ◽  
pp. 720-731 ◽  
Author(s):  
Camille Musseau ◽  
Simone Vincenzi ◽  
Dušan Jesenšek ◽  
Stéphanie Boulêtreau ◽  
Frédéric Santoul ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Niche Shift ◽  
Marble Trout ◽  
Niche Expansion ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Dietary Niche ◽  
Salmo Marmoratus

scholarly journals Invasion but not hybridisation is associated with ecological niche shift in monkeyflowers

2019 ◽  
Author(s):  
Daniele Da Re ◽  
Angel P. Olivares ◽  
William Smith ◽  
Mario Vallejo-Marín
Keyword(s):  
New Zealand ◽  
Ecological Niche ◽  
Secondary Contact ◽  
Niche Shift ◽  
Ecological Niches ◽  
Introduced Populations ◽  
Niche Dynamics ◽  
Introduced Range ◽  
Niche Shifts ◽  
Native And Introduced Ranges

AbstractBackgroundThe ecological niche occupied by novel hybrids can influence their establishment as well as the potential to coexist with their parents. Hybridisation generates new phenotypic combinations, which, in some cases, may allow them to occupy ecological niches outside the environmental envelope of parental taxa. In other cases, hybrids may retain similar ecological niches to their parents, resulting in competition and affecting their coexistence. To date, few studies have quantitatively assessed niche shifts associated with hybridisation in recently introduced populations while simultaneously characterising the niche of parental species in both native and introduced ranges.AimsIn this study, we compared the ecological niche of a novel hybrid plant with the niches of its two parental taxa in the non-native geographic range. We also characterised and compared the parental taxa’s ecological niche of native and introduced populations in order to assess potential niche changes during the invasion process independent of hybridisation.MethodsWe studied monkeyflowers (Mimulus spp., Phrymaceae) that were introduced from the Americas to Europe and New Zealand in the last 200 years. We focused on a novel hybrid, triploid, asexual taxon (M. × robertsii) that occurs only in the British Isles where its two parents (M. guttatus and M. luteus) come into secondary contact. We assembled more than 12,000 geo-referenced occurrence records and eight environmental variables of the three taxa across native and introduced ranges, and conducted ecological niche model analysis using maximum entropy, principal component and niche dynamics analysis.ResultsWe found no evidence of niche shift in the hybrid, M. × robertsii compared to introduced populations of both of their parental taxa. The hybrid had a niche more similar to M. luteus, which is also the rarest of the parental taxa on the introduced range. Among parental monkeyflowers, M. guttatus showed niche conservatism in introduced populations in Europe, but a niche shift in New Zealand, while M. luteus showed a niche shift in Europe. However, the evidence of niche shift should be treated with caution due to the occurence of non-analog climatic conditions, small population size and unfilling niche dynamics.ConclusionsOur results suggest that hybridisation in non-native monkyeflowers did not result in a shift in ecological niche. This niche conservation could create competition between parental and derived taxa, the outcome of which will depend on relative competitive abilities. Further work is needed to establish if the expansion of the hybrid in the introduced range is causally related to the apparent rarity of one of the parents (M.luteus). Finally, the comparison of native and non-native populations of parental taxa, suggest that whether invasions result in niche shifts or not depends on both taxon and geographic region, highlighting the idiosyncratic nature of biological invasions.

scholarly journals Ecological niche shift between diploid and tetraploid plants of Fragaria (Rosaceae) in China

2019 ◽  
Vol 121 ◽  
pp. 68-75 ◽  
Author(s):  
J.-Z. Wan ◽  
L.-X. Chen ◽  
S. Gao ◽  
Y.-B. Song ◽  
S.-L. Tang ◽  
...  
Keyword(s):  
Ecological Niche ◽  
Niche Shift

scholarly journals Infrageneric treatment of Phalaris (Canary grasses, Poaceae) based on molecular phylogenetics and floret structure

2015 ◽  
Vol 28 (6) ◽  
pp. 355 ◽  
Author(s):  
Stephanie M. Voshell ◽  
Riccardo M. Baldini ◽  
Khidir W. Hilu
Keyword(s):  
Ecological Niche ◽  
Molecular Phylogenetics ◽  
Morphological Features ◽  
Taxonomic Classification ◽  
Infrageneric Classification ◽  
Polyploid Evolution ◽  
Niche Expansion ◽  
The World ◽  
Forage Species ◽  
Nuclear Its

Phalaris L. (Poaceae, canary grasses) is a genus of 20 species found throughout the world with endemic, cosmopolitan, invasive and forage species. A variety of features in the genus underscore its importance for the study of polyploid evolution in relation to biodiversity, ecological niche expansion or contraction, endemism, and invasiveness. A formal and comprehensive infrageneric classification for Phalaris is lacking. This study utilises molecular phylogenetics (nuclear ITS and plastid trnT–F regions), morphological features (primarily floret structure) and chromosome cytology to present the first comprehensive taxonomic classification for the genus. Two subgenera (Phalaris and Phalaroides) and five sections (Phalaris, Phalaroides, Caroliniana, Bulbophalaris, Heterachne) are established here to accommodate the 20 Phalaris species. Keys to the subgenera and sections, morphological descriptions, and a list of synonymy are provided.

scholarly journals Within outlying mean indexes: refining the OMI analysis for the realized niche decomposition

2017 ◽  
Author(s):  
Stéphane Karasiewicz ◽  
Sylvain Dolédec ◽  
Sébastien Lefebvre
Keyword(s):  
Climate Change ◽  
Ecological Niche ◽  
Environmental Gradient ◽  
Niche Shift ◽  
Habitat Conditions ◽  
Realized Niche ◽  
Niche Dynamics ◽  
Niche Concept ◽  
The Difference ◽  
Definition Of

The ecological niche concept has a revival interest under climate change, especially to study its impact on niche shift and/or conservatism. Here, we propose the Within Outlying Mean Indexes (WitOMI), which refines the Outlying Mean Index (OMI) analysis by using its properties in combination with the K-select analysis species marginality decomposition. The purpose is to decompose the ecological niche, into subniches associated to the experimental design, i.e. taking into account temporal or spatial subsets. WitOMI emphasizes the habitat conditions that contribute 1) to the definition of species’ niches using all available conditions and, at the same time, 2) to the delineation of species’ subniches according to given subsets of dates or sites. This latter aspect allows addressing niche dynamics by highlighting the influence of atypical habitat conditions on species at a given time or space. 3) Then, the biological constraint exerted on the species subniche becomes observable within the Euclidean space as the difference between the potential subniche and the realized subniche. We illustrate the decomposition of published OMI analysis, using spatial and temporal examples. The species assemblage’s subniches are comparable to the same environmental gradient, producing a more accurate and precise description of the assemblage niche distribution under climate change.

scholarly journals Within outlying mean indexes: refining the OMI analysis for the realized niche decomposition

2017 ◽  
Author(s):  
Stéphane Karasiewicz ◽  
Sylvain Dolédec ◽  
Sébastien Lefebvre
Keyword(s):  
Climate Change ◽  
Ecological Niche ◽  
Environmental Gradient ◽  
Niche Shift ◽  
Habitat Conditions ◽  
Realized Niche ◽  
Niche Dynamics ◽  
Niche Concept ◽  
The Difference ◽  
Definition Of

The ecological niche concept has a revival interest under climate change, especially to study its impact on niche shift and/or conservatism. Here, we propose the Within Outlying Mean Indexes (WitOMI), which refines the Outlying Mean Index (OMI) analysis by using its properties in combination with the K-select analysis species marginality decomposition. The purpose is to decompose the ecological niche, into subniches associated to the experimental design, i.e. taking into account temporal or spatial subsets. WitOMI emphasizes the habitat conditions that contribute 1) to the definition of species’ niches using all available conditions and, at the same time, 2) to the delineation of species’ subniches according to given subsets of dates or sites. This latter aspect allows addressing niche dynamics by highlighting the influence of atypical habitat conditions on species at a given time or space. 3) Then, the biological constraint exerted on the species subniche becomes observable within the Euclidean space as the difference between the potential subniche and the realized subniche. We illustrate the decomposition of published OMI analysis, using spatial and temporal examples. The species assemblage’s subniches are comparable to the same environmental gradient, producing a more accurate and precise description of the assemblage niche distribution under climate change.

scholarly journals Within outlying mean indexes: refining the OMI analysis for the realized niche decomposition

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3364 ◽  
Author(s):  
Stéphane Karasiewicz ◽  
Sylvain Dolédec ◽  
Sébastien Lefebvre
Keyword(s):  
Environmental Change ◽  
Ecological Niche ◽  
R Package ◽  
Habitat Destruction ◽  
Niche Shift ◽  
Habitat Conditions ◽  
Niche Dynamics ◽  
Niche Concept ◽  
The Difference ◽  
Definition Of

The ecological niche concept has regained interest under environmental change (e.g., climate change, eutrophication, and habitat destruction), especially to study the impacts on niche shift and conservatism. Here, we propose the within outlying mean indexes (WitOMI), which refine the outlying mean index (OMI) analysis by using its properties in combination with theK-select analysis species marginality decomposition. The purpose is to decompose the ecological niche into subniches associated with the experimental design, i.e., taking into account temporal and/or spatial subsets. WitOMI emphasize the habitat conditions that contribute (1) to the definition of species’ niches using all available conditions and, at the same time, (2) to the delineation of species’ subniches according to given subsets of dates or sites. The latter aspect allows addressing niche dynamics by highlighting the influence of atypical habitat conditions on species at a given time and/or space. Then, (3) the biological constraint exerted on the species subniche becomes observable within Euclidean space as the difference between the existing fundamental subniche and the realized subniche. We illustrate the decomposition of published OMI analyses, using spatial and temporal examples. The species assemblage’s subniches are comparable to the same environmental gradient, producing a more accurate and precise description of the assemblage niche distribution under environmental change. The WitOMI calculations are available in the open-access R package “subniche.”

Sign in / Sign up

Export Citation Format

Share Document