Anya Nova Metcalfe (Former Employee)
Science and Products
Filter Total Items: 18
The application of metacommunity theory to the management of riverine ecosystems The application of metacommunity theory to the management of riverine ecosystems
River managers strive to use the best available science to sustain biodiversity and ecosystem function. To achieve this goal requires consideration of processes at different scales. Metacommunity theory describes how multiple species from different communities potentially interact with local-scale environmental drivers to influence population dynamics and community structure. However...
Authors
Christopher J. Patrick, Kurt E. Anderson, Brown L. Brown, Charles P. Hawkins, Anya N. Metcalfe, Parsa Saffarinia, Tadeu Siqueira, Christopher M. Swan, Jonathan D. Tonkin, Lester L. Yuan
Net-spinning caddisfly distribution in large regulated rivers Net-spinning caddisfly distribution in large regulated rivers
Most of the world's large rivers are dammed for the purposes of water storage, flood control, and power production. Damming rivers fundamentally alters water temperature and flows in tailwater ecosystems, which in turn affects the presence and abundance of downstream biota.We collaborated with more than 200 citizen scientists to collect 2,194 light trap samples across 2 years and more...
Authors
Anya Metcalfe, Jeffrey Muehlbauer, Theodore Kennedy, Charles B. Yackulic, Kimberly L. Dibble, Jane C. Marks
Spatial population structure of a widespread aquatic insect in the Colorado River Basin: Evidence for a Hydropsyche oslari species complex Spatial population structure of a widespread aquatic insect in the Colorado River Basin: Evidence for a Hydropsyche oslari species complex
Structural connectivity and dispersal ability are important constraints on functional connectivity among populations. For aquatic organisms that disperse among stream corridors, the regional structure of a river network can, thus, define the boundaries of gene flow. In this study, we used mitochondrial DNA (mtCO1 barcoding gene) to examine the genetic diversity and population structure...
Authors
Anya N. Metcalfe, Theodore A. Kennedy, Jane C. Marks, Aaron D. Smith, Jeffrey D. Muehlbauer
Bug flows: Don’t count your midges until they hatch Bug flows: Don’t count your midges until they hatch
Usually when people hear about a “bug problem” it’s due to an undesirable overabundance of insects (think plague of locusts). In the Colorado River in Grand Canyon, however, we are faced with the opposite predicament: the river is essentially devoid of bugs. Aquatic insects are a fundamental component of a healthy river ecosystem. Most aquatic insects spend their juvenile life stages...
Authors
Anya Metcalfe, Jeffrey Muehlbauer, Morgan Ford, Theodore Kennedy
Phenology of the adult angel lichen moth (Cisthene angelus) in Grand Canyon, USA Phenology of the adult angel lichen moth (Cisthene angelus) in Grand Canyon, USA
We investigated the phenology of adult angel lichen moths (Cisthene angelus) along a 364-km long segment of the Colorado River in Grand Canyon, Arizona, USA, using a unique data set of 2,437 light-trap samples collected by citizen scientists. We found that adults of C. angelus were bivoltine from 2012 to 2014. We quantified plasticity in wing lengths and sex ratios among the two...
Authors
Anya N. Metcalfe, Theodore A. Kennedy, Jeffrey D. Muehlbauer
Flow management for hydropower extirpates aquatic insects, undermining river food webs Flow management for hydropower extirpates aquatic insects, undermining river food webs
Dams impound the majority of rivers and provide important societal benefits, especially daily water releases that enable on-peak hydroelectricity generation. Such “hydropeaking” is common worldwide, but its downstream impacts remain unclear. We evaluated the response of aquatic insects, a cornerstone of river food webs, to hydropeaking using a life history–hydrodynamic model. Our model...
Authors
Theodore A. Kennedy, Jeffrey D. Muehlbauer, Charles B. Yackulic, D.A. Lytle, S.A. Miller, Kimberly L. Dibble, Eric W. Kortenhoeven, Anya N. Metcalfe, Colden V. Baxter
Non-USGS Publications**
Nathan, L., Mamoozadeh, N., Tumas, H., Gunselman, S., Klass, K., Metcalfe, A., Edge, C., Waits, L., Spruell, P., Lowery, E. & Connor, E. 2019. A spatially-explicit, individual-based demogenetic simulation framework for evaluating hybridization dynamics. Ecological Modelling 401: 40-51.
Eitzel, M., Cappadonna, J., Santos-Lang, C., Duerr, R., West, S., Virapongse, A., Kyba, C., Bowser, A., Cooper, C., Sforzi, A., Metcalfe, A., Harris, E., Thiel, M., Haklay, M., Ponciano, L., Roche, J., Ceccaroni, L., Shilling, F., Dörler, D., Heigl, F., Kiessling, T., Davis, B., & Jiang, Q. 2017. Citizen science terminology matters: Exploring key terms. Citizen Science: Theory and Practice 2: 1-20. DOI: 10.5334/cstp.96.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 18
The application of metacommunity theory to the management of riverine ecosystems The application of metacommunity theory to the management of riverine ecosystems
River managers strive to use the best available science to sustain biodiversity and ecosystem function. To achieve this goal requires consideration of processes at different scales. Metacommunity theory describes how multiple species from different communities potentially interact with local-scale environmental drivers to influence population dynamics and community structure. However...
Authors
Christopher J. Patrick, Kurt E. Anderson, Brown L. Brown, Charles P. Hawkins, Anya N. Metcalfe, Parsa Saffarinia, Tadeu Siqueira, Christopher M. Swan, Jonathan D. Tonkin, Lester L. Yuan
Net-spinning caddisfly distribution in large regulated rivers Net-spinning caddisfly distribution in large regulated rivers
Most of the world's large rivers are dammed for the purposes of water storage, flood control, and power production. Damming rivers fundamentally alters water temperature and flows in tailwater ecosystems, which in turn affects the presence and abundance of downstream biota.We collaborated with more than 200 citizen scientists to collect 2,194 light trap samples across 2 years and more...
Authors
Anya Metcalfe, Jeffrey Muehlbauer, Theodore Kennedy, Charles B. Yackulic, Kimberly L. Dibble, Jane C. Marks
Spatial population structure of a widespread aquatic insect in the Colorado River Basin: Evidence for a Hydropsyche oslari species complex Spatial population structure of a widespread aquatic insect in the Colorado River Basin: Evidence for a Hydropsyche oslari species complex
Structural connectivity and dispersal ability are important constraints on functional connectivity among populations. For aquatic organisms that disperse among stream corridors, the regional structure of a river network can, thus, define the boundaries of gene flow. In this study, we used mitochondrial DNA (mtCO1 barcoding gene) to examine the genetic diversity and population structure...
Authors
Anya N. Metcalfe, Theodore A. Kennedy, Jane C. Marks, Aaron D. Smith, Jeffrey D. Muehlbauer
Bug flows: Don’t count your midges until they hatch Bug flows: Don’t count your midges until they hatch
Usually when people hear about a “bug problem” it’s due to an undesirable overabundance of insects (think plague of locusts). In the Colorado River in Grand Canyon, however, we are faced with the opposite predicament: the river is essentially devoid of bugs. Aquatic insects are a fundamental component of a healthy river ecosystem. Most aquatic insects spend their juvenile life stages...
Authors
Anya Metcalfe, Jeffrey Muehlbauer, Morgan Ford, Theodore Kennedy
Phenology of the adult angel lichen moth (Cisthene angelus) in Grand Canyon, USA Phenology of the adult angel lichen moth (Cisthene angelus) in Grand Canyon, USA
We investigated the phenology of adult angel lichen moths (Cisthene angelus) along a 364-km long segment of the Colorado River in Grand Canyon, Arizona, USA, using a unique data set of 2,437 light-trap samples collected by citizen scientists. We found that adults of C. angelus were bivoltine from 2012 to 2014. We quantified plasticity in wing lengths and sex ratios among the two...
Authors
Anya N. Metcalfe, Theodore A. Kennedy, Jeffrey D. Muehlbauer
Flow management for hydropower extirpates aquatic insects, undermining river food webs Flow management for hydropower extirpates aquatic insects, undermining river food webs
Dams impound the majority of rivers and provide important societal benefits, especially daily water releases that enable on-peak hydroelectricity generation. Such “hydropeaking” is common worldwide, but its downstream impacts remain unclear. We evaluated the response of aquatic insects, a cornerstone of river food webs, to hydropeaking using a life history–hydrodynamic model. Our model...
Authors
Theodore A. Kennedy, Jeffrey D. Muehlbauer, Charles B. Yackulic, D.A. Lytle, S.A. Miller, Kimberly L. Dibble, Eric W. Kortenhoeven, Anya N. Metcalfe, Colden V. Baxter
Non-USGS Publications**
Nathan, L., Mamoozadeh, N., Tumas, H., Gunselman, S., Klass, K., Metcalfe, A., Edge, C., Waits, L., Spruell, P., Lowery, E. & Connor, E. 2019. A spatially-explicit, individual-based demogenetic simulation framework for evaluating hybridization dynamics. Ecological Modelling 401: 40-51.
Eitzel, M., Cappadonna, J., Santos-Lang, C., Duerr, R., West, S., Virapongse, A., Kyba, C., Bowser, A., Cooper, C., Sforzi, A., Metcalfe, A., Harris, E., Thiel, M., Haklay, M., Ponciano, L., Roche, J., Ceccaroni, L., Shilling, F., Dörler, D., Heigl, F., Kiessling, T., Davis, B., & Jiang, Q. 2017. Citizen science terminology matters: Exploring key terms. Citizen Science: Theory and Practice 2: 1-20. DOI: 10.5334/cstp.96.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.