New Lit Alert: Urban environment determines population genetics in the green toad, Bufotes viridis

Urban environment determines population genetics in the green toad, Bufotes viridis Viktória Vargová, Damiána Gužiová, Monika Balogová, Natália Pipová, Marcel Uhrin & Peter Kaňuch Abstract Heavily urbanized areas can hinder dispersal and gene flow between amphibian populations. Given the growth potential of urbanization, it is important to examine how this specific environment shapes their genetic... Continue Reading →

September 11, 2023 0

New Lit Alert: Natural and anthropogenic landscape factors shape functional connectivity of an ecological specialist in urban Southern California

Natural and anthropogenic landscape factors shape functional connectivity of an ecological specialist in urban Southern California Sarah M. Wenner, Melanie A. Murphy, Kathleen S. Delaney, Gregory B. Pauly, Jonathan Q. Richmond, Robert N. Fisher, Jeanne M. Robertson Abstract Identifying how natural (i.e., unaltered by human activity) and anthropogenic landscape variables influence contemporary functional connectivity in... Continue Reading →

August 26, 2022 0

New Lit Alert: Recent spread of blue tits into the Barcelona urban environment: morphological differences and the role of balanced dispersal

Recent spread of blue tits into the Barcelona urban environment: morphological differences and the role of balanced dispersal Juan Carlos Senar & Mats Björklund Abstract Rates of phenotypic change are greater in cities than in any other habitat. Consequently, urban habitats are an ideal experimental area to study contemporary evolution and adaptation. A key question... Continue Reading →

November 19, 2021 0

How to Study Urban Speciation

Given the right conditions, life in the city might just lead to speciation. Wouter Halfwerk digs into the potential for and evidence of urban speciation in his latest paper in Frontiers in Ecology and Evolution. Halfwerk points out that many studies have revealed both genetic and phenotypic divergence in urban populations, but asks are we seeing... Continue Reading →

February 5, 2021 0

Systemic Racism Shapes Urban Ecology and Evolution

The rate of urbanization is increasing greatly and with that, comes large human populations. Our population has increased from 6 billion people in 2000 to roughly 7.8 billion people in 2020 and in North America alone (~370 million people), over 80% of people reside in cities. These urban areas serve as an epicenter for human... Continue Reading →

September 8, 2020 3

Urbanization Reduces Genetic Connectivity in Bobcats

When you live in the outskirts of the city, every once in a while you may spot a bobcat in your neighborhood. In fact, we have had a few urban observation posts of neighborhood bobcats. But how are these urban bobcats fairing compared to ones that stay in their natural habitat? Recently, Kozakiewicz and co-authors... Continue Reading →

January 14, 2020 0

A Tale of Two Amphibians: Urban Landscapes Differentially Impact Gene Flow

When we think of urban organisms, we often don't think of aquatic organisms. But wetlands exist in the urban matrix, and aquatic and amphibious species are impacted by habitat changes associated with urbanization. A recent study published in Ecology and Evolution by Jared Homola, Cynthia Loftin, and Michael Kinnison dug into the population genetics of... Continue Reading →

November 19, 2019 0

Urbanization Influences Gene Flow and Genetic Drift

Recently, I published a review paper in Molecular Ecology with my co-authors, Ruth Rivkin, Marc TJ Johnson, Jason Munshi-South, and Brian Verrelli. In this paper, we discussed how urbanization influences gene flow and genetic drift. We looked at 167 primary literature papers to see what researchers have found. Competing Models of Urban Effects You might... Continue Reading →

November 5, 2019 2

Back to the Basics: What is Urban Evolution?

Urban evolution can have different meanings depending on what field you come from. If you are an urban planner, it might mean that urban areas are getting larger, even using sustainable energy sources where they didn't previously. For some architects it may mean that they now figure out how to put green roofs on buildings.... Continue Reading →

August 13, 2019 0

Evolution 2019: Urban Coyotes are Genetically Distinct from and Less Diverse than Coyotes in Natural Habitats

Habitat fragmentation associated with urbanisation if often thought to limit the movement of mobile species, potentially leading to genetically distinct clusters of individuals across a city. Identifying the landscape features that act as barriers to dispersal and drive population differentiation has become a central goal in recent urban evolution research. Javier Monzón, an assistant professor... Continue Reading →

June 27, 2019 0

Evolution 2019: Human Land Use Impacts Gene Flow in the Biodiversity Hotspot Cape Floristic Region, South Africa

During Monday’s poster session at Evolution 2019, I had the chance to talk with Dr. Lindsay Miles (currently a postdoc at the University of Toronto-Mississauga and an editor of this blog) about research she conducted during her PhD at Virginia Commonwealth University. Lindsay and her fellow researchers report on how anthropogenic land use is influencing... Continue Reading →

June 27, 2019 0

Evolution 2019: Urbanization Affects Gene Flow and Genetic Drift

As of 2008, more people live in urban than in rural areas, and human populations in cities will only continue to increase. One goal of urban evolution research is to determine how the expansion of cities impacts genetic diversity of plants and animals. Cities may alter genetic diversity by changing how organisms move across the... Continue Reading →

June 23, 2019 1

Proc. B Special Issue: Invasive Grass in Urban Areas

This post is part of our series covering the large number of urban evolution manuscripts that were published in August 2018 in the special issue "The Evolution of City Life" in the Proceedings of the Royal Society B. Urbanization can create new pathways of introduction for invasive species. The recently introduced invasive grass Brachypodium... Continue Reading →

May 10, 2019 0

Even Low Intensity Urbanization Can Influence Evolution

A recent article published in Conservation Genetics by Gizelle Hurtado and Karen Mabry found that even low levels of urbanization can influence genetic structure of Merriam's kangaroo rat. Researchers collected the kangaroo rats from Las Cruces, NM in 5 urban and 5 non-urban sites to compare genetic diversity and genetic structure between the two habitat... Continue Reading →

April 26, 2019 0

Urban Speciation

Above: Fig. 2 from Rivkin et al: many species have been shown to adapt to cities. Thompson et al. ask whether or not this could lead to speciation. Organisms that persist in urban environments are subject to novel selective pressures as they exploit this novel niche space. We now know that this ecological shift can lead to... Continue Reading →

November 30, 2018 1

Tag: gene flow