Emily L Weiser, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 23
Evidence for a growing population of eastern migratory monarch butterflies is currently insufficient
The eastern migratory population of monarch butterflies has experienced a multi-decadal decline, but a recent increase in abundance (to 6.05 ha in winter 2018) has led some observers to question whether the population has reversed its long-standing decline and embarked on a trajectory of increasing abundance. We examined this possibility through changepoint analyses, first assessing...
Authors
Wayne E. Thogmartin, Jennifer A. Szymanski, Emily L. Weiser
Challenges for leveraging citizen science to support statistically robust monitoring programs
Large samples and long time series are often needed for effective broad-scale monitoring of status and trends in wild populations. Obtaining those sample sizes can be more feasible when volunteers contribute to the dataset, but volunteer-selected sites are not always representative of a population. Previous work to account for biased site selection has relied on knowledge of covariates...
Authors
Emily L. Weiser, James Diffendorfer, Laura López-Hoffman, Darius J. Semmens, Wayne E. Thogmartin
Is the timing, pace and success of the monarch migration associated with sun angle?
A basic question concerning the monarch butterfly’s fall migration is which monarchs succeed in reaching overwintering sites in Mexico, which fail—and why. We document the timing and pace of the fall migration, ask whether the sun’s position in the sky is associated with the pace of the migration, and whether timing affects success in completing the migration. Using data from the Monarch...
Authors
Orley R. Taylor, James P. Lovett, David L Gibo, Emily L. Weiser, Wayne E. Thogmartin, Darius J. Semmens, James Diffendorfer, John M. Pleasants, Samuel Pecoraro, Ralph Grundel
Balancing sampling intensity against spatial coverage for a community science monitoring programme
Community science is an increasingly integral part of biodiversity research and monitoring, often achieving broad spatial and temporal coverage but lower sampling intensity than studies conducted by professional scientists. When designing a community‐science monitoring programme, careful assessment of sampling designs that could be both feasible and successful at meeting programme goals...
Authors
Emily L. Weiser, James Diffendorfer, Ralph Grundel, Laura Lopez Hoffman, Samuel Pecoraro, Darius J. Semmens, Wayne E. Thogmartin
Technical comment on “Global pattern of nest predation is disrupted by climate change in shorebirds”
Kubelka et al. (Report, 9 November 2018, p. 680-683) claim that climate change has disrupted patterns of nest predation in shorebirds. They report that predation rates have increased since the 1950s, especially in the Arctic. We describe methodological problems with their analyses and argue that there is no solid statistical support for their claims.
Authors
Martin Bulla, Jeroen Reneerkens, Emily L. Weiser, Aleksandr Sokolov, Audrey R. Taylor, Benoit Sittler, Brian J. McCaffery, Daniel R. Ruthrauff, Daniel H. Catlin, David C. Payer, David Ward, Diana V. Solovyeva, Eduardo SA Santos, Eldar Rakhimberdiev, Erica Nol, Eunbi Kwon, Glen S. Brown, Glenda D Hevia, H. River Gates, James H. Johnson, Jan A. van Gils, Jannik Hansen, Jean-Francois Lamarre, Jennie Rausch, Jesse R. Conklin, Joseph R. Liebezeit, Joël Bêty, Johannes Lang, José A. Alves, Juan Fernandez-Elipe, Klaus-Michael Exo, Loic Bollache, Marcelo Bertellotti, Marie-Andree Giroux, Martijn van de Pol, Matthew S. Johnson, Megan L. Boldenow, Mihai Valcu, Mikhail Soloviev, Natalya Sokolova, Nathan R. Senner, Nicholas Lecomte, Nicolas Meyer, Niels Martin Schmidt, Olivier Gilg, Paul A Smith, Paula Machin, Rebecca L. McGuire, Ricardo AS Cerboncini, Richard Ottvall, Rob SA van Bemmelen, Rose J. Swift, Sara T Saalfeld, Sara E Jamieson, Stephen C. Brown, Theunis Piersma, Tomas Albrecht, Veronica L D'Amico, Richard Lanctot, Bart Kempenaers
Geographic variation in the intensity of warming and phenological mismatch between Arctic shorebirds and invertebrates
Responses to climate change can vary across functional groups and trophic levels, leading to a temporal decoupling of trophic interactions or ‘phenological mismatches.’ Despite a growing number of single-species studies that identified phenological mismatches as a nearly universal consequence of climate change, we have a limited understanding of the spatial variation in the intensity of...
Authors
Enubi Kwon, Emily L. Weiser, Richard Lanctot, Stephen C. Brown, H. River Gates, H. Grant Gilchrist, Steve J. Kendall, David B. Lank, Joseph R. Liebezeit, Laura McKinnon, Erica Nol, David C. Payer, Jennie Rausch, Sarah T. Saalfeld, Daniel J. Rinella, Nathan R. Senner, David Ward, Paul A Smith, Robert C. Wissman, Brett K. Sandercock
Science and Products
Filter Total Items: 23
Evidence for a growing population of eastern migratory monarch butterflies is currently insufficient
The eastern migratory population of monarch butterflies has experienced a multi-decadal decline, but a recent increase in abundance (to 6.05 ha in winter 2018) has led some observers to question whether the population has reversed its long-standing decline and embarked on a trajectory of increasing abundance. We examined this possibility through changepoint analyses, first assessing...
Authors
Wayne E. Thogmartin, Jennifer A. Szymanski, Emily L. Weiser
Challenges for leveraging citizen science to support statistically robust monitoring programs
Large samples and long time series are often needed for effective broad-scale monitoring of status and trends in wild populations. Obtaining those sample sizes can be more feasible when volunteers contribute to the dataset, but volunteer-selected sites are not always representative of a population. Previous work to account for biased site selection has relied on knowledge of covariates...
Authors
Emily L. Weiser, James Diffendorfer, Laura López-Hoffman, Darius J. Semmens, Wayne E. Thogmartin
Is the timing, pace and success of the monarch migration associated with sun angle?
A basic question concerning the monarch butterfly’s fall migration is which monarchs succeed in reaching overwintering sites in Mexico, which fail—and why. We document the timing and pace of the fall migration, ask whether the sun’s position in the sky is associated with the pace of the migration, and whether timing affects success in completing the migration. Using data from the Monarch...
Authors
Orley R. Taylor, James P. Lovett, David L Gibo, Emily L. Weiser, Wayne E. Thogmartin, Darius J. Semmens, James Diffendorfer, John M. Pleasants, Samuel Pecoraro, Ralph Grundel
Balancing sampling intensity against spatial coverage for a community science monitoring programme
Community science is an increasingly integral part of biodiversity research and monitoring, often achieving broad spatial and temporal coverage but lower sampling intensity than studies conducted by professional scientists. When designing a community‐science monitoring programme, careful assessment of sampling designs that could be both feasible and successful at meeting programme goals...
Authors
Emily L. Weiser, James Diffendorfer, Ralph Grundel, Laura Lopez Hoffman, Samuel Pecoraro, Darius J. Semmens, Wayne E. Thogmartin
Technical comment on “Global pattern of nest predation is disrupted by climate change in shorebirds”
Kubelka et al. (Report, 9 November 2018, p. 680-683) claim that climate change has disrupted patterns of nest predation in shorebirds. They report that predation rates have increased since the 1950s, especially in the Arctic. We describe methodological problems with their analyses and argue that there is no solid statistical support for their claims.
Authors
Martin Bulla, Jeroen Reneerkens, Emily L. Weiser, Aleksandr Sokolov, Audrey R. Taylor, Benoit Sittler, Brian J. McCaffery, Daniel R. Ruthrauff, Daniel H. Catlin, David C. Payer, David Ward, Diana V. Solovyeva, Eduardo SA Santos, Eldar Rakhimberdiev, Erica Nol, Eunbi Kwon, Glen S. Brown, Glenda D Hevia, H. River Gates, James H. Johnson, Jan A. van Gils, Jannik Hansen, Jean-Francois Lamarre, Jennie Rausch, Jesse R. Conklin, Joseph R. Liebezeit, Joël Bêty, Johannes Lang, José A. Alves, Juan Fernandez-Elipe, Klaus-Michael Exo, Loic Bollache, Marcelo Bertellotti, Marie-Andree Giroux, Martijn van de Pol, Matthew S. Johnson, Megan L. Boldenow, Mihai Valcu, Mikhail Soloviev, Natalya Sokolova, Nathan R. Senner, Nicholas Lecomte, Nicolas Meyer, Niels Martin Schmidt, Olivier Gilg, Paul A Smith, Paula Machin, Rebecca L. McGuire, Ricardo AS Cerboncini, Richard Ottvall, Rob SA van Bemmelen, Rose J. Swift, Sara T Saalfeld, Sara E Jamieson, Stephen C. Brown, Theunis Piersma, Tomas Albrecht, Veronica L D'Amico, Richard Lanctot, Bart Kempenaers
Geographic variation in the intensity of warming and phenological mismatch between Arctic shorebirds and invertebrates
Responses to climate change can vary across functional groups and trophic levels, leading to a temporal decoupling of trophic interactions or ‘phenological mismatches.’ Despite a growing number of single-species studies that identified phenological mismatches as a nearly universal consequence of climate change, we have a limited understanding of the spatial variation in the intensity of...
Authors
Enubi Kwon, Emily L. Weiser, Richard Lanctot, Stephen C. Brown, H. River Gates, H. Grant Gilchrist, Steve J. Kendall, David B. Lank, Joseph R. Liebezeit, Laura McKinnon, Erica Nol, David C. Payer, Jennie Rausch, Sarah T. Saalfeld, Daniel J. Rinella, Nathan R. Senner, David Ward, Paul A Smith, Robert C. Wissman, Brett K. Sandercock