Urban development explains reduced genetic diversity in a narrow range endemic freshwater fish

Mather, Andrew; Hancox, Daniel; Riginos, Cynthia

doi:10.1007/s10592-014-0688-7

Cited by 9 publications

(6 citation statements)

References 44 publications

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“…An overarching theme of our review is that the effects of urbanization on population structure of populations varies substantially among species and thus likely depends on the specific biology of each species. For example, we found that urban fragmentation can result in increased genetic drift and reduced gene flow for many organisms including both small (Gortat et al, ) and large mammals (Wilson, Farley, McDonough, Talbot, & Barboza, ), lizards (Delaney et al, ), amphibians (Hitchings & Beebee, ), fish (Mather, Hancox, & Riginos, ), insects (Keller, Nentwig, & Largiader, ) and plants (Hollingsworth & Dickson, ). Urban facilitation, however, resulted in reduced drift and increased gene flow in a variety of organisms including insects (Kamdem, Fouet, Gamez, & White, ; Vickruck & Richards, ), birds (Tang et al, ), mammals (Adams, van Heezik, Dickinson, & Robertson, ) and plants (Johnson, Prashad, Lavoignat, & Saini, ).…”

Section: Joint Effects Of Urbanization On Genetic Drift and Gene Flowmentioning

confidence: 99%

Gene flow and genetic drift in urban environments

et al. 2019

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Evidence is growing that human modification of landscapes has dramatically altered evolutionary processes. In urban population genetic studies, urbanization is typically predicted to act as a barrier that isolates populations of species, leading to increased genetic drift within populations and reduced gene flow between populations. However, urbanization may also facilitate dispersal among populations, leading to higher genetic diversity within, and lower differentiation between, urban populations. We reviewed the literature on nonadaptive urban evolution to evaluate the support for each of these urban fragmentation and facilitation models. In a review of the literature with supporting quantitative analyses of 167 published urban population genetics studies, we found a weak signature of reduced within‐population genetic diversity and no evidence of consistently increased between‐population genetic differentiation associated with urbanization. In addition, we found that urban landscape features act as barriers or conduits to gene flow, depending on the species and city in question. Thus, we speculate that dispersal ability of species and environmental heterogeneity between cities contributes to the variation exhibited in our results. However, >90% of published studies reviewed here showed an association of urbanization with genetic drift or gene flow, highlighting the strong impact of urbanization on nonadaptive evolution. It is clear that species biology and city heterogeneity obscure patterns of genetic drift and gene flow in a quantitative analysis. Thus, we suggest that future research makes comparisons of multiple cities and nonurban habitats, and takes into consideration species' natural history, environmental variation, spatial modelling and marker selection.

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Section: Joint Effects Of Urbanization On Genetic Drift and Gene Flowmentioning

confidence: 99%

Gene flow and genetic drift in urban environments

et al. 2019

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“…Indeed, in addition to overfishing, Ayamaru Lake also experiences important environmental threats (deforestation, urbanization) and episodic droughts. Based on the sequence of a mitochondrial DNA fragment of the native Australian freshwater fish Rhadinocentrus ornatus , Mather et al showed that habitat degradation caused by urbanization significantly reduced genetic diversity [15].…”

Section: Discussionmentioning

confidence: 99%

Genetic Diversity of Boeseman's Rainbowfish (Melanotaenia Boesemani) Reared in Indonesian Farms Compared to Endangered Natural Populations

Nugraha

Pouyaud

Carman

et al. 2015

Tropical Conservation Science

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Endemic to two lakes (Ayamaru and Uter) of West Papua (Indonesia), the Boeseman´s Rainbowfish Melanotaenia boesemani Allen & Cross, 1980 is a very popular ornamental freshwater fish. As a result, this rainbowfish species faces great threats and is on the red list of endangered species. Therefore, rearing of this species in aquaculture systems appears to be a promising solution to limit capture of wild specimens and prevent its extinction. Although its reproduction cycle has been controlled for more than 30 years, very few farms still raise M. boesmani , probably due to the problems reported by the farmers, such as decline of production, higher proportion of females per spawning, loss of coloration, lower growth rate and fecundity. Using 12 microsatellites previously developed for this species, comparison of genotypes within six farms around Jakarta indicated that all reared strains originated from Ayamaru Lake. No deficit in heterozygotes was evidenced, suggesting that there was no major inbreeding in these reared populations. Genotype analysis also suggested that M. boesemani species is a metapopulation composed of genetically differentiated populations. Altogether, these results indicate that the problems experienced by the farmers are due not to inbreeding depression but to other factors such as inadequate management and/or poor water quality. Yet, increasing aquaculture production is probably the most effective way to alleviate the pressure that M. boesemani faces in its natural environment.

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“…Monitoring urban growth patterns, generally based on land use/land cover (LULC) changes, is one of the major global research themes in terms of urbanization [1]. Excessive urbanization affects the survival and development of human society and ecosystems [2,3], and its consequences involve the transformation of natural forms of land cover into urban areas [4], effects on genetic diversity [5], an increased disease burden [6], heat island effects [7], and greenhouse gas emissions [8]. Therefore, timely and accurate acquisition of urban LULC distribution can serve as the basis for assessing and mitigating these negative socio-economic-ecological impacts [2,9].…”

Section: Introductionmentioning

confidence: 99%

Monitoring of Urban Growth Patterns in Rapidly Growing Bahir Dar City of Northwest Ethiopia with 30 year Landsat Imagery Record

Kindu

Angelova

Schneider

et al. 2020

IJGI

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Monitoring urban growth patterns is an important measure to improve our understanding of land use/land cover (LULC) changes and a central part in the proper development of any city. In this study, we analyzed the changes over a period of 30 years (1985–2015) in Bahir Dar, one of the rapidly growing cities of northwest Ethiopia. Satellite images of Landsat TM (1985, 1995, and 2008), and OLI (2015) were used. The classification was carried out using the object-based image analysis technique and a change analysis was undertaken using post-classification comparison in GIS as a novel framework. An accuracy assessment was conducted for each reference year. Eight LULC types were successfully captured with overall accuracies ranging from 88.3% to 92.9% and a Kappa statistic of 0.85 to 0.92. The classification result revealed that cropland (66%), water (12.5%), and grassland (6%) were the dominant LULC types with a small share of areas covered by built-up areas (2.4%) in 1985. In 2015, cropland and water continued to be dominant followed by built-up areas. The change result shows that a rapid reduction in natural forest cover followed by grassland and wetland occurred between the first (1985–1995), second (1995–2008), and third (2008–2015) study periods. On the contrary, build-ups increased in all three periods by 9.3%, 121.3%, and 44.8%, respectively. Although the conversion between the LULC classes varied substantially, analysis of the 30-year change matrix revealed that about 31% was subject to intensive change between the classes. Specifically, the built-up area has increased by 250.5% during the study years. The framed approach used in this research is a good repeatable example of how to assess and monitor urban growth at the local level, by combining remote sensing and GIS technologies. Further study is suggested to investigate detailed drivers, consequences of changes, and future options.

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Urban development explains reduced genetic diversity in a narrow range endemic freshwater fish

Cited by 9 publications

References 44 publications

Gene flow and genetic drift in urban environments

Gene flow and genetic drift in urban environments

Genetic Diversity of Boeseman's Rainbowfish (Melanotaenia Boesemani) Reared in Indonesian Farms Compared to Endangered Natural Populations

Monitoring of Urban Growth Patterns in Rapidly Growing Bahir Dar City of Northwest Ethiopia with 30 year Landsat Imagery Record

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