Search results for: S. Elizabeth Alter

Items from 1 to 13 out of 13 results

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Riverscape genomics of cichlid fishes in the lower Congo: Uncovering mechanisms of diversification in an extreme hydrological regime

Naoko P. Kurata, Michael J. Hickerson, Sandra L. Hoffberg, Ned Gardiner, more

Molecular Ecology > 31 > 13 > 3516 - 3532

Freshwater fishes are notably diverse, given that freshwater habitat represents a tiny fraction of the earth's surface, but the mechanisms generating this diversity remain poorly understood. Rivers provide excellent models to understand how freshwater diversity is generated and maintained across heterogeneous habitats. In particular, the lower Congo River (LCR) consists of a dynamic hydroscape exhibiting...

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Trade‐offs between reducing complex terminology and producing accurate interpretations from environmental DNA: Comment on “Environmental DNA: What's behind the term?” by Pawlowski et al., (2020)

Naiara Rodriguez‐Ezpeleta, Olivier Morissette, Colin W. Bean, Shivakumara Manu, more

Molecular Ecology > 30 > 19 > 4601 - 4605

In a recent paper, “Environmental DNA: What's behind the term? Clarifying the terminology and recommendations for its future use in biomonitoring,” Pawlowski et al. argue that the term eDNA should be used to refer to the pool of DNA isolated from environmental samples, as opposed to only extra‐organismal DNA from macro‐organisms. We agree with this view. However, we are concerned that their proposed...

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Regional‐scale aquifer hydrogeology as a driver of phylogeographic structure in the Neotropical catfish Rhamdia guatemalensis (Siluriformes: Heptapteridae) from cenotes of the Yucatán Peninsula, Mexico

Jairo Arroyave, Christopher M. Martinez, Fausto H. Martínez‐Oriol, Erick Sosa, more

Freshwater Biology > 66 > 2 > 332 - 348

The Yucatán Peninsula (YP) contains one of the most spectacular and developed karstic aquifers in the world, which connects to the surface through water‐filled sinkholes locally known as cenotes. Cenotes and their associated submerged caves are home to a remarkable diversity of aquatic fauna, yet very little is known about spatial patterns of intraspecific genetic and morphological variation across...

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Cover Image

Jairo Arroyave, Christopher M. Martinez, Fausto H. Martínez‐Oriol, Erick Sosa, more

Freshwater Biology > 66 > 2 > i - i

The cover image is based on the Original Article Regional‐scale aquifer hydrogeology as a driver of phylogeographic structure in the Neotropical catfish Rhamdia guatemalensis (Siluriformes: Heptapteridae) from cenotes of the Yucatán Peninsula, Mexico, by Jairo Arroyave et al., https://doi.org/10.1111/fwb.13641.

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Contemporary and historical effective population sizes of Atlantic sturgeon Acipenser oxyrinchus oxyrinchus

John Waldman, S. Elizabeth Alter, Douglas Peterson, Lorraine Maceda, more

Conservation Genetics > 2019 > 20 > 2 > 167-184

Atlantic sturgeon (Acipenser oxyrinchus oxyrinchus) is an anadromous fish of considerable conservation concern, following its long history of overfishing and exposure to a variety of other anthropogenic stressors. Though reaching a large size, population abundances (Nc) of Atlantic sturgeon are not easily surveyed using traditional fishery methods because of their relative scarcity and their many...

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Genomewide SNP data reveal cryptic phylogeographic structure and microallopatric divergence in a rapids‐adapted clade of cichlids from the Congo River

S. Elizabeth Alter, Jason Munshi‐South, Melanie L. J. Stiassny

Molecular Ecology > 26 > 5 > 1401 - 1419

The lower Congo River is a freshwater biodiversity hot spot in Africa characterized by some of the world's largest rapids. However, little is known about the evolutionary forces shaping this diversity, which include numerous endemic fishes. We investigated phylogeographic relationships in Teleogramma, a small clade of rheophilic cichlids, in the context of regional geography and hydrology. Previous...

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Melting barriers to faunal exchange across ocean basins

C. Seabird McKeon, Michele X. Weber, S. Elizabeth Alter, Nathaniel E. Seavy, more

Global Change Biology > 22 > 2 > 465 - 473

Accelerated loss of sea ice in the Arctic is opening routes connecting the Atlantic and Pacific Oceans for longer periods each year. These changes may increase the ease and frequency with which marine birds and mammals move between the Pacific and Atlantic Ocean basins. Indeed, recent observations of birds and mammals suggest these movements have intensified in recent decades. Reconnection of the...

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Climate impacts on transocean dispersal and habitat in gray whales from the Pleistocene to 2100

S. Elizabeth Alter, Matthias Meyer, Klaas Post, Paul Czechowski, more

Molecular Ecology > 24 > 7 > 1510 - 1522

Arctic animals face dramatic habitat alteration due to ongoing climate change. Understanding how such species have responded to past glacial cycles can help us forecast their response to today's changing climate. Gray whales are among those marine species likely to be strongly affected by Arctic climate change, but a thorough analysis of past climate impacts on this species has been complicated by...

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Molecular phylogenetics reveals convergent evolution in lower Congo River spiny eels

S. Elizabeth Alter, Bianca Brown, Melanie L. J. Stiassny

BMC Evolutionary Biology > 2015 > 15 > 1 > 1-12

Background The lower Congo River (LCR) is a region of exceptional species diversity and endemism in the Congo basin, including numerous species of spiny eels (genus Mastacembelus). Four of these exhibit distinctive phenotypes characterized by greatly reduced optic globes deeply embedded into the head (cryptophthalmia) and reduced (or absent) melanin pigmentation, among other characteristics. A strikingly...

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From refugia to rookeries: Phylogeography of Atlantic green turtles

Eugenia Naro-Maciel, Brendan N. Reid, S. Elizabeth Alter, George Amato, more

Journal of Experimental Marine Biology and Ecology > 2014 > 461 > C > 306-316

Investigating species' distribution and abundance over time is central to evolutionary biology, and provides important context for conservation and management. With respect to population genetic structure in green sea turtles (Chelonia mydas), certain processes such as female philopatry to natal rookeries are well understood, while others, such as male philopatry and historical changes in distribution...

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Forecasting the consequences of climate-driven shifts in human behavior on cetaceans

S. Elizabeth Alter, Mark P. Simmonds, John R. Brandon

Marine Policy > 2010 > 34 > 5 > 943-954

While climate change is expected to affect cetaceans primarily via loss of habitat and changes in prey availability, additional consequences may result from climate-driven shifts in human behaviors and economic activities. For example, increases in shipping, oil and gas exploration and fishing due to the loss of Arctic sea ice are highly likely to exacerbate acoustic disturbance, ship strikes, bycatch...

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Comparing Evolutionary Patterns and Variability in the Mitochondrial Control Region and Cytochrome b in Three Species of Baleen Whales

S. Elizabeth Alter, Stephen R. Palumbi

Journal of Molecular Evolution > 2009 > 68 > 1 > 97-111

The rapidly evolving mitochondrial control region remains an important source of information on phylogeography and demographic history for cetaceans and other vertebrates, despite great uncertainty in the rate of nucleotide substitution across both nucleotide positions and lineages. Patterns of variation in linked markers with slower rates of evolution can potentially be used to calibrate the rate...

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An impediment to consumer choice: Overfished species are sold as Pacific red snapper

Cheryl A. Logan, S. Elizabeth Alter, Alison J. Haupt, Katharine Tomalty, more

Biological Conservation > 2008 > 141 > 6 > 1591-1599

Concern over the collapse of many wild-caught fisheries has led to a recent focus on seafood-certification and consumer-driven support of sustainable seafood. However, such conservation strategies depend critically on the accurate labeling of seafood species in marketplaces. Pacific rockfish, a group of >60 species in the genus Sebastes, are often marketed as Pacific red snapper, but little is...

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