Sarah Cusser, Ph.D. 

Sarah works to better understand, conserve, and restore insect communities and the essential ecosystem services they provide in natural, agricultural, and urban habitats.

As one of the terrestrial invertebrate conservation ecologists at Santa Barbara Botanic Garden, Sarah Cusser, Ph.D., works to better understand, conserve, and restore insect communities and the essential ecosystem services they provide in natural, agricultural, and urban habitats. In the past, Sarah has investigated pollination and decomposition services provided by insects in Texas, Michigan, New Jersey, and Pennsylvania and worked on habitat restoration projects in California, Vermont, and Ohio. Sarah earned her doctorate in evolution, ecology, and behavior from University of Texas at Austin, her master’s in evolution, ecology, and organismal behavior from the Ohio State University, and a bachelor’s degree in biology from Pomona College. 

Research interests: landscape ecology, restoration ecology, conservation, ecosystem services, pollination ecology 

Publications

2025
Peer Reviewed Publications

Etter, K., D. Knapp, and S. Cusser. 2025. Non-native plants support non-native pollinators leaving the rare Salt Marsh Bird’s Beak (Chloropyron maritimum ssp. maritimum) in the lurch. Journal of Pollination Ecology.

Landis, T., K. Etter, S. Cusser, and H. Sardiñas. 2025. Seed collection of two early growing native milkweeds in California. Native Plants Journal.

Tsang, P.N., A.A. De Santis, … S. Cusser … Y. Zou, L.C. Ponisio, and T.C. Bonebrake. 2025. Land use change consistently reduces α- but not β- and γ-diversity of bees. Global Change Biology 31: e70006.

Technical Reports

Cusser, S., Lima Borges I, Schneider, D. Integrated Pollinator and Demography Monitoring for California Jewelflower (Caulanthus californicus) 2025, Preliminary Report, BLM

Cusser, S., Targeted Restoration in Early-Season Monarch Breeding Landscapes Program: Early Season Milkweed Surveys within the Los Padres National Forest, California, 2025, Yearly Report, USFW

Knapp, Dand Cusser, S. Annual Progress Report to U.S. Fish and Wildlife Service: Elucidating threats and recovery actions for Vandenberg monkeyflower (Diplacus vandenbergensis), 2025, USFW

2024
Peer Reviewed Publications

Knapp, D., S. Calloway, and S. Cusser. 2024. Using historic data to understand the shrinking pollinators of the endangered salt marsh bird’s beak (Chloropyron maritimum subsp. maritimum). Western North American Naturalist 83: 498–507.

Technical Reports

Cusser, S., Etter, E. and Knapp, D. Tracking changes in the pollinators of Gaviota Tarplant (Deinandra increscens ssp. villosa) before, during, and after wind turbine construction at the Strauss Wind Site, 2024, Final Report, Bay.Wa

Cusser, S., Etter, E. Hernandez, M, Hazelhurst, J., Schneider, H. and Knapp, D. Restoring Pollination Networks for the California Jewelflower, 2024 Final Report, BLM

Cusser, S., Targeted Restoration in Early-Season Monarch Breeding Landscapes Program: Early Season Milkweed Surveys within the Los Padres National Forest, California, 2024 Yearly Report, USFW

2023
Peer Reviewed Publications

Giménez-García, A., A. Allen-Perkins, I. Bartomeus, … S. Cusser … and A. Magrach. 2023. Pollination supply models from local to global scale. Web Ecology 23: 99–129.

Cusser, S., S. Jha, E. Lonsdorf, and T. Ricketts. 2023. Public and private economic benefits of adopting conservation tillage for cotton pollination. Agriculture, Ecosystems & Environment 342: 108251.

Technical Reports

Cusser, S., Targeted Restoration in Early-Season Monarch Breeding Landscapes Program: Early Season Milkweed Surveys within the Los Padres National Forest, California, 2023 Yearly Report, USFW

Cusser, S., Etter, E. and Knapp, D. Floral Pollinators of Deinandra increscens ssp. villosa 2023, Preliminary Findings Report, Bay.Wa

Cusser, S., Etter, E. and Knapp, D. Restoring Pollination Networks for the California Jewelflower, 2023, Preliminary Findings Report, BLM

Cusser, S., Etter, E. and Knapp, D Chloropyron maritimum ssp. maritimum, Salt Marsh Birds’ Beak, 2023, Preliminary Findings Report, CDFW

2022
Peer Reviewed Publications

Allen-Perkins, A., A. Magrach, M. Dainese, L.A. Garibaldi, D. Kleijn, R. Rader, … S. Cusser … and A. Montero-Castaño. 2022. CropPol: A dynamic, open and global database on crop pollination. 103: e3614.

Lybbert, A., S. Cusser, K. Hung, and K. Goodell. 2022. 10-year trends reveal declining quality of planted pollinator habitat on reclaimed mines irrespective of seed mix diversity. Ecological Applications 32: e02467.

Technical Reports

Cusser, S, Etter, E. and Knapp, D. Floral Pollinators of Deinandra increscens ssp. villosa 2022, Preliminary Findings Report, Bay.Wa

Cusser, S, Etter, E. and Knapp, D. Restoring Pollination Networks for the California Jewelflower, 2022, Preliminary Findings Report, BLM

Cusser, S., Etter, E. and Knapp, D Chloropyron maritimum ssp. maritimum, Salt Marsh Birds’ Beak, 2022, Preliminary Findings Report, CDFW

2021
Peer Reviewed Publications

Cusser, S., and S. Jha. 2021. No tradeoff in fiber quality with increased cotton yield due to outcross pollination. Sustainability 13: 6079.

Bahlai, C.A., E.R. White, J.D. Perrone, S. Cusser, and K.S. Whitney. 2021. The Broken Window: An algorithm for quantifying and characterizing misleading trajectories in ecological processes. Ecological Informatics: 101336.

Senapathi, D., J. Fründ, M. Albrecht, M. Garratt, … S. Cusser … and A. Klein. 2021. Wild insect diversity increases inter-annual stability in global crop pollinator communities. Proceedings of the Royal Society B 288: 20210212.

Cusser, S., N.M. Haddad, and S. Jha. 2021. Unexpected functional complementarity from non-bee pollinators enhances cotton yield for dramatic economic gain. Agriculture, Ecosystems & Environment 314: 107415.

Cusser, S., J. Helms, C. Bahlai, and N.M. Haddad. 2021. How long do population level field experiments need to be? A meta-analysis across the 40-year old LTER network. Ecology Letters 24: 1103–1111.

2020
Peer Reviewed Publications

Cusser, S., J. Pechal, and N.M. Haddad. 2020. Carrion increases pollination service across an urban gradient. Urban Ecosystems 24: 243–250.

Cusser, S., C. Bahlai, S.M. Swinton, G.P. Robertson, and N.M. Haddad. 2020. Long-term research avoids spurious and misleading trends in sustainability attributes of no-till. Global Change Biology.

2019
Peer Reviewed Publications

Dainese, M., E.A. Martin, M.A. Aizen, M. Albrecht, I. Bartomeus, R. Bommarco, … S. Cusser … and J. Ghazoul. 2019. A global synthesis reveals biodiversity-mediated benefits for crop production. Science Advances 5: eaax0121.

Cusser, S., C. Grando, M.I. Zucchi, M.M. López-Uribe, N.S. Pope, K. Ballare, … and S. Jha. 2019. Small but critical: Semi-natural habitat fragments promote bee abundance in cotton agroecosystems across both Brazil and the United States. Landscape Ecology 34: 1825–1836.

Ballare, K.M., N.S. Pope, A.R. Castilla, S. Cusser, R.P. Metz, and S. Jha. 2019. Utilizing field collected insects for next generation sequencing: Effects of sampling, storage, and DNA extraction methods. Ecology and Evolution.

Cusser, S., J.L. Neff, and S. Jha. 2019. Landscape context differentially drives diet breadth for two key pollinator species. Oecologia 191: 873–886.

2018
Peer Reviewed Publications

Cusser, S., J.L. Neff, and S. Jha. 2018. Land-use history drives contemporary pollinator community similarity. Landscape Ecology.

2016
Peer Reviewed Publications

Cusser, S., J.L. Neff, and S. Jha. 2016. Natural land cover drives pollinator abundance and richness, leading to reductions in pollen limitation in cotton agroecosystems. Agriculture, Ecosystems & Environment 226: 33–42.

2015
Peer Reviewed Publications

Cusser, S., J.L. Neff, and S. Jha. 2015. Land use change and pollinator extinction debt in exurban landscapes. Insect Conservation and Diversity 8: 562–572.

2014
Peer Reviewed Publications

Cusser, S., and K. Goodell. 2014. Using a centrality index to determine the contribution of restored and volunteer plants in the restoration of plant-pollinator mutualisms on a reclaimed strip mine. Ecological Restoration 32: 179–188.

2013
Peer Reviewed Publications

Cusser, S., and K. Goodell. 2013. Diversity and distribution of floral resources influence the restoration of plant–pollinator networks on a reclaimed strip mine. Restoration Ecology 21: 713–721.

Insights

Terrestrial Invertebrate Conservation Ecologist
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