Sean Ryan

Sean Ryan
Exponent · Ecological and Biological Sciences

PhD and MS in Ecolgy and Evolutionary Biology

About

20
Publications
10,409
Reads
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1,124
Citations
Education
August 2011 - August 2016
University of Notre Dame
Field of study
  • Ecology and Evolutionary biology

Publications

Publications (20)
Article
Full-text available
The small cabbage white butterfly, Pieris rapae , is a major agricultural pest of cruciferous crops and has been introduced to every continent except South America and Antarctica as a result of human activities. In an effort to reconstruct the near-global invasion history of P. rapae , we developed a citizen science project, the “Pieris Project,” a...
Preprint
Full-text available
A major goal of invasion and climate change biology research is to understand the ecological and evolutionary responses of organisms to anthropogenic disturbance, especially over large spatial and temporal scales. One significant, and sometimes unattainable, challenge of these studies is garnering sufficient numbers of relevant specimens, especiall...
Article
Full-text available
The power of citizen science to contribute to both science and society is gaining increased recognition, particularly in physics and biology. Although there is a long history of public engagement in agriculture and food science, the term 'citizen science' has rarely been applied to these efforts. Similarly, in the emerging field of citizen science,...
Article
Full-text available
Climate-mediated changes in hybridization will dramatically alter the genetic diversity, adaptive capacity, and evolutionary trajectory of interbreeding species. Our ability to predict the consequences of such changes will be key to future conservation and management decisions. Here we tested through simulations how recent warming (over the course...
Article
Full-text available
Hybrid zones are a valuable tool for studying the process of speciation and for identifying the genomic regions undergoing divergence and the ecological (extrinsic) and non-ecological (intrinsic) factors involved. Here, we explored the genomic and geographic landscape of divergence in a hybrid zone between Papilio glaucus and Papilio canadensis. Us...
Preprint
Hybrid zones are a valuable tool for studying the process of speciation and for identifying the genomic regions undergoing divergence and the ecological (extrinsic) and non-ecological (intrinsic) factors involved. Here, we explored the genomic and geographic landscape of divergence in a hybrid zone between Papilio glaucus and Papilio canadensis . U...
Article
Full-text available
A key adaptation in insects for dealing with variable environmental conditions is the ability to diapause. The tiger swallowtail butterflies, Papilio glaucus and P. canadensis are ideal species to explore the genetic causes and population genetic consequences of diapause because divergence in this trait is believed to be a salient factor in maintai...
Article
Full-text available
Citizen science has advanced science for hundreds of years, contributed to many peer-reviewed articles, and informed land management decisions and policies across the United States. Over the last 10 years, citizen science has grown immensely in the United States and many other countries. Here, we show how citizen science is a powerful tool for tack...
Article
Full-text available
The goal of this report is to help government agencies and other organizations involved in natural resource management, environmental protection, and policymaking related to both to make informed decisions about investing in citizen science. In this report, we explore the current use of citizen science in natural resource and environmental science...
Conference Paper
Background/Question/Methods Theory predicts that hybrid zones are capable of shifting and that these shifts can have substantial evolutionary impacts. However, empirical examples of hybrid zone movement are rare due to the lack of long-term datasets and difficulties in detection due to inadequate sampling of molecular markers. Consequently, our u...
Conference Paper
Background/Question/Methods For many insect populations, phenology—the timing of life cycle events—and voltinism—the number of generations a population has in a given year—are both greatly influenced by climate. While the consequences of climate induced changes in phenology and voltinism could substantially impact insect populations, it remains u...
Article
Despite no obvious barriers to gene flow in the marine realm, environmental variation and ecological specializations can lead to genetic differentiation in highly mobile predators. Here, we investigated the genetic structure of the harbor porpoise over the entire species distribution range in western Palearctic waters. Combined analyses of ten micr...
Conference Paper
Background/Question/Methods Clinal variation in species traits that correspond with climatic gradients are predicted to shift as climate change alters this underlying gradient. However, despite considerable effort, surprisingly few studies have documented such changes. Using historically (1980s) and recently (2010s) collected specimens from a but...
Conference Paper
Background/Question/Methods In response to a changing climate many species are predicted to undergo shifts in their geographic range and many such cases have already been documented. However, species traits may also change in response to climate change via evolution and plasticity, but studies demonstrating changes in species traits to climate ch...
Conference Paper
Background/Question/Methods It is well known that many phytophagous insects use plant chemistry in the process of host selection. For example, it has been shown that plants from the family Brassicaceae contain glucosinolates (secondary metabolites) that can act as attractants or deterrents to insect herbivores either in their intact form or when...

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Projects

Project (1)
Project
This work is part of the first objective of the international citizen science project - Pieris Project (pierisproject.org)