{"id":22,"date":"2021-03-05T17:03:54","date_gmt":"2021-03-05T17:03:54","guid":{"rendered":"https:\/\/agsci-labs.oregonstate.edu\/levit\/?page_id=22"},"modified":"2021-03-05T18:08:17","modified_gmt":"2021-03-05T18:08:17","slug":"wildlife-ecology-trophic-cascades-and-indirect-effects","status":"publish","type":"page","link":"https:\/\/agsci-labs.oregonstate.edu\/levit\/research\/wildlife-ecology-trophic-cascades-and-indirect-effects\/","title":{"rendered":"Wildlife Ecology, Trophic Cascades, and Indirect Effects"},"content":{"rendered":"\n
\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n

I am interested in the interactions of predator species and the causes and consequences of coexistence versus competitive exclusion. For example, my research explores the possiblity that wolves suppress coyotes, which allows fox populations to increase. This has implications for our understanding of how strongly top predators structure ecosysems. Our current research explores the role of bears in ecosystems, and how the widespread extirpation of brown bears has impacted ecosystems. We have particularly focused on the seed-dispersal services provided by brown bears and are increasingly interested in brown bears as predators.<\/p>\n\n\n\n

We participate in a large collaborative project at Starkey Experimental Forest with GPS-collared bears, coyotes, bobcats, cougars, as well as cattle, deer, and elk. This intensive project allows for detailed understanding for how species interact.<\/p>\n\n\n\n

Another major focus in recent years has been the ecology and conservation of small forest carnivores in the Pacific Northwest. Pacific fisher, Humboldt marten, and western spotted skunks have been our primary study systems.<\/p>\n\n\n\n

Relevant Publications<\/strong><\/p>\n\n\n\n

Pedrosa, F., Berc\u00ea, W., Levi, T<\/strong>. Pires, M., Galetti, M. In revision<\/em>. Invasive species promote critical seed dispersal services in defaunated landscapes<\/p>\n\n\n\n

Pedrosa, F., Berc\u00ea, W., Costa, V.D., Levi, T.<\/strong>, Galetti, M. In revision<\/em>. Large scale agriculture is subsidizing the invasion of wild pigs in Brazil<\/p>\n\n\n\n

Spitz, D.B.<\/strong>, Rowland, M., Clark, D.A., Wisdom, M.J., Smith, J.B., Brown, C.L., Levi, T. <\/strong>In press.<\/em> Non-consumptive behavioral responses and nutritional consequences of elk when avoiding human hunters. Ecosphere<\/em><\/p>\n\n\n\n

Eriksson, C.E.<\/strong>, Moriarty, K.M., Linnell, M.A., Levi, T. <\/strong>2019. <\/em>Biotic factors influencing the unexpected distribution of a Humboldt marten population in forested sand dunes. PLoS ONE<\/em><\/p>\n\n\n\n

Spitz, D.<\/strong>, Clark, D., Wisdom, M.J., Rowland, M., Johnson, B., Long, R.A. Levi, T.<\/strong> 2018. <\/em>Fire history influences large-herbivore behavior at circadian, seasonal, and successional scales. Ecological Applications<\/em><\/p>\n\n\n\n

Wolf, C., Betts, M. G., Levi. T.<\/strong>, Newsome, T. M., Ripple, W. J. 2018. <\/em>Large species within Carnivora are large carnivores. Royal Society Open Science<\/em><\/p>\n\n\n\n

Shakeri, Y.<\/strong>, White, K.W., Levi, T. <\/strong>2018<\/em>. <\/em>Seed dispersal and resource subsidies from salmon-supported bears to granivores. Ecosphere<\/em><\/p>\n\n\n\n

Linnell, M.A., Moriarty, K.M., Green, D.S., Levi, T.<\/strong> 2018. <\/em>Density and population trajectories of coastal marten: a rare and geographically isolated small carnivore. PeerJ<\/em><\/p>\n\n\n\n

Ostfeld, R.S.*<\/sup>, Levi, T.*<\/sup><\/strong>, Keesing, F., Oggenfuss, K. Canham, C.D. 2018. <\/em>Tick-borne disease risk in a forest food web. Ecology<\/em>*authors contributed equally<\/em><\/p>\n\n\n\n

Smith, J.A., Thomas, A.C. , Levi, T.<\/strong>, Wang, Y., Wilmers, C.C. 2018.<\/em> DNA metabarcoding reveals human-induced shifts in dietary niche partitioning in a carnivore guild. Oikos<\/em><\/p>\n\n\n\n

Harrer, L.E.F.<\/strong>, Levi, T.<\/strong> 2018. <\/em>The primacy of bears as seed dispersers in salmon-bearing ecosystems. Ecosphere<\/em><\/p>\n\n\n\n

White, K.S., Gregovic, D., Levi, T. <\/strong>2017. <\/em>Projecting the future of an alpine ungulate under climate change scenarios. Global Change Biology<\/em><\/p>\n\n\n\n

Adams, M.S., Service, C., Bateman, A., Bourbonnais, M., Artelle, K., Nelson, T., Paquet, P., Levi, T.<\/strong>, Darimont, C.T. 2017. Intrapopulation isotopic niche diversity over landscapes; spatial patterns inform conservation of bear-salmon systems. Ecosphere<\/em><\/p>\n\n\n\n

Ripple, W.J., Chapron, G., Lopez-Bao, J.V., Durant, S.M., Macdonald, D.W., Lindsey, P.A., Bennett, E.L., Beschta, R.L., Bruskotter, J.T., Campos-Arceiz, A., Corlett, R.T., Darimont, C.T., Dickman, A.J., Dirzo, R., Dublin, H.T., Estes, J.A., Everatt, K.T., Galetti, M., Goswami,V.R., Hayward, M.W., Hedges, S., Hoffman, M., Hunter, L.T.B., Kerley, G.I.H., Letnic, M., Levi, T.<\/strong>, Maisels, F., Morrison, J.C., Nelson, M.P., Newsome, T.M., Painter, L., Pringle, R.M., Sandom, C.J., Terborgh, J., Treves, A., Valkenburgh, B.V., Vucetich, J.A., Wirsing, A.J., Wallach, A.D., Wolf, C., Woodroffe, R., Young, H., Zhang, Li. 2016. Conserving the World\u2019s Megafauna and Biodiversity: The Fierce Urgency of Now. Bioscience.<\/em><\/p>\n\n\n\n

Wheat, R.E., Allen, J.M.<\/strong>, Miller, S.D.L, Wilmers, C.C., Levi, T<\/strong>. 2016. <\/em>Environmental DNA from residual saliva for efficient noninvasive genetic monitoring of brown bears (Ursus arctos<\/em>). PLoS ONE<\/em><\/p>\n\n\n\n

Ripple W.J., Abernethy, K., Chapron, G., Levi, T.<\/strong>, Lindsey, P.A., Newsome, T.M., Peres, C.A., Wallach, A.D., Wolf, C. 2016. <\/em>Are we eating the world\u2019s mammals to extinction. Royal Society Open Science<\/em><\/p>\n\n\n\n

Antunes, A.P., Fewster, R., Venticinque, E.M., Peres, C.A., Levi, T.<\/strong>, Rohe, F., Shepard-Jr, G.H. 2016. <\/em>Empty rivers rather than empty forests: a century of commercial hunting in Amazonia. Science Advances<\/em><\/p>\n\n\n\n

Ripple, W.J., Chapron, G., Lopez-Bao, J.V., Durant, S.M., Macdonald, D.W., Lindsey, P.A., Bennett, E.L., Beschta, R.L., Bruskotter, J.T., Campos-Arceiz, A., Corlett, R.T., Darimont, C.T., Dickman, A.J., Dirzo, R., Dublin, H.T., Estes, J.A., Everatt, K.T., Galetti, M., Goswami,V.R., Hayward, M.W., Hedges, S., Hoffman, M., Hunter, L.T.B., Kerley, G.I.H., Letnic, M., Levi, T.<\/strong>, Maisels, F., Morrison, J.C., Nelson, M.P., Newsome, T.M., Painter, L., Pringle, R.M., Sandom, C.J., Terborgh, J., Treves, A., Valkenburgh, B.V., Vucetich, J.A., Wirsing, A.J., Wallach, A.D., Wolf, C., Woodroffe, R., Young, H., Zhang, Li. 2016. <\/em>Saving the world\u2019s terrestrial megafauna. Bioscience. P.biw092<\/em><\/p>\n\n\n\n

Fragoso, J.M.V., Levi, T.<\/strong>, Oliveira, L.F.B., Luzar, J.B., Overman, H., Read, J.M., Silvius, K.M. 2016.<\/em> Line transect surveys under detect terrestrial mammals: implications for the sustainability of subsistence hunting. PLoS ONE<\/em><\/p>\n\n\n\n

Peres,  C.A., Emilio, T., Schietti, T., Desmouli\u00e8re, S.J.M, Levi, T<\/strong>.  2016<\/em>. Dispersal limitation induces long-term biomass collapse in overhunted Amazonian forests. Proceedings of the National Academy of Sciences. <\/em>113: 892-897<\/p>\n\n\n\n

Beschta, R.L., Painter, L.E., Levi, T.<\/strong>, Ripple, W.J. 2016<\/em>. Long-term aspen dynamics and trophic cascades in Northern Yellowstone. Canadian Journal of Forest Research<\/em>. 46: 548-556<\/p>\n\n\n\n

Ripple, W.J., Newsome, T.M., Wolf, C., Dirzo, R., Everatt, K.T., Galetti, M., Hayward, M.W., Kerley, G.I.H., Levi, T.<\/strong>, Lindsey, P.A., Macdonald, D.W., Malhi, Y., Painter, L.E., Sandom, C.J., Terborgh, J., Van Valkenburgh, B. 2015. Collapse of the World\u2019s Largest Herbivores. Science Advances<\/em>. 1(4): e1400103<\/p>\n\n\n\n

evi, T.<\/strong>, Silvius, K.M., Oliveira, L.F.B, Fragoso, J.MV. 2013.<\/em>\u00a0Competition and facilitation in the capuchin-squirrel monkey relationship<\/strong><\/a>.\u00a0Biotropica<\/em>. doi:10.1111\/btp.12046<\/p>\n\n\n\n

Levi, T.<\/strong>, Peres, C.A. 2013.<\/em>Dispersal vacuum in the seedling recruitment of a primate-dispersed Amazonian tree<\/strong><\/a>.\u00a0Biological Conservation<\/em>. 163:99-106<\/p>\n\n\n\n

Wilmers, C.C.,\u00a0Levi, T.\u00a0<\/strong>2013.\u00a0<\/em>Do irrigation and predator control reduce the productivity of migratory ungulate herds?<\/strong><\/a>Ecology<\/em>. 94:1264\u20131270<\/p>\n\n\n\n

Wilmers, C.C., Ram, K., Watson, F.G.R, White, P.J., Smith, D.W., Levi, T.<\/strong> 2013. Climate and vegetation phenology \u2013 Predicting the effects of warming temperatures. in<\/em>White, P.J., editor. Yellowstone\u2019s Wildlife in Transition. Harvard University Press<\/p>\n\n\n\n

Levi, T.,\u00a0<\/strong>Kilpatrick, A.M., Mangel, M., Wilmers, C.C. 2012.\u00a0<\/em>Deer, predators, and the emergence of Lyme disease<\/strong><\/a>.\u00a0Proceedings of the National Academy of Sciences.<\/em>109:10942-10947<\/p>\n\n\n\n

Levi, T.<\/strong>, Darimont, C.T., MacDuffee, M., Mangel, M., Paquet, P., Wilmers, C.C. 2012.\u00a0<\/em>Using Grizzly bears to assess harvest-ecosystem tradeoffs in salmon fisheries<\/strong><\/a>.\u00a0PLoS Biology<\/em>. 10(4)<\/p>\n\n\n\n

Levi, T.<\/strong>, Wilmers, C.C. 2012.\u00a0Wolves-Coyotes-Foxes: A cascade among carnivores<\/strong><\/a>.Ecology<\/em>. 93:921-929<\/p>\n","protected":false},"excerpt":{"rendered":"

I am interested in the interactions of predator species and the causes and consequences of coexistence versus competitive exclusion. For example, my research explores the possiblity that wolves suppress coyotes, which allows fox populations to increase. This has implications for our understanding of how strongly top predators structure ecosysems. Our current research explores the role of bears in […]<\/p>\n","protected":false},"author":224,"featured_media":0,"parent":15,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-22","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/agsci-labs.oregonstate.edu\/levit\/wp-json\/wp\/v2\/pages\/22","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agsci-labs.oregonstate.edu\/levit\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/agsci-labs.oregonstate.edu\/levit\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/agsci-labs.oregonstate.edu\/levit\/wp-json\/wp\/v2\/users\/224"}],"replies":[{"embeddable":true,"href":"https:\/\/agsci-labs.oregonstate.edu\/levit\/wp-json\/wp\/v2\/comments?post=22"}],"version-history":[{"count":4,"href":"https:\/\/agsci-labs.oregonstate.edu\/levit\/wp-json\/wp\/v2\/pages\/22\/revisions"}],"predecessor-version":[{"id":60,"href":"https:\/\/agsci-labs.oregonstate.edu\/levit\/wp-json\/wp\/v2\/pages\/22\/revisions\/60"}],"up":[{"embeddable":true,"href":"https:\/\/agsci-labs.oregonstate.edu\/levit\/wp-json\/wp\/v2\/pages\/15"}],"wp:attachment":[{"href":"https:\/\/agsci-labs.oregonstate.edu\/levit\/wp-json\/wp\/v2\/media?parent=22"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}