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- The summer of 2023 is a notable time for water-resource management in the western United States: Glen Canyon Dam, on the Colorado River, turns 60 years old while the largest dam-removal project in history is beginning on the Klamath River. This commentary discusses these events in the context of a changing paradigm for dam and reservoir management in this region. Since the era of large dam building began to wane six decades ago, new challenges have arisen for dam and reservoir management owing to climate change, population increase, reservoir sedimentation, declining safety of aging dams,...AuthorsAmy E. East, Gordon GrantSourceWater Resources Research. 59(10): e2023WR035646.Year2023
- Red turpentine beetle, Dendroctonus valens LeConte (Coleoptera: Curculionidae: Scolytinae), previously responded more strongly to (—)-β-pinene + ethanol than (+)-3-carene + ethanol lures at sites burned the prior year by wildfire in Oregon and northeastern California, whereas at a thinned-unburned Arizona site (+)-3-carene + ethanol was the stronger attractant. This discrepancy was further examined to tease apart whether D. valens attraction varies by region or previous forest disturbance types. Here, (—)-β-pinene + ethanol and (+)-3-carene + ethanol lures were tested in pine stands at two...AuthorsRick G. Kelsey, Douglas J. WestlindKeywordsSourceAgricultural and Forest Entomology. 25(4): 650-657.Year2023
- Updating predictions of the response of high-profile, at-risk species to climate change and anthropogenic stressors is vital for informing effective conservation action. Here, we review two prior generations of Bayesian network probability models predicting changes in global polar bear (Ursus maritimus) population status, and provide a contemporary update based on recent research findings and sea-ice projections by newer climate models. We compare predictions of polar bear population response from all 3 models among four circumpolar Arctic ecoregions, using sea ice projections based on...AuthorsBruce G. Marcot, Todd C. Atwood, David C. Douglas, Jeffrey F. Bromaghin, Anthony M. Pagano, Steven C. AmstrupSourceEcological Indicators. 156(4): 111130.Year2023
- Forage quality and quantity are nutritional attributes that influence ungulate populations through bottom-up processes. In northern Idaho, harsh winters occasionally cause substantial mortality of elk (Cervus canadensis) and deer (Odocoileus hemionus) populations; however, recent studies in the Western United States show that nutritional deficiencies on summer range also affect populations by reducing reproduction and survival. In fact, in many settings, nutritional deficiencies in summer may have a more limiting effect on elk populations than deficiencies in winter. Large tracts of mid-...AuthorsDeborah S. Monzingo, John G. Cook, Rachel C. Cook, Michael Wisdom, Lisa A. ShipleyKeywordsSourceGen. Tech. Rep. PNW-GTR-1016. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 88 p.Year2023
- Management of forest lands considering multi-functional approaches is the basis to sustain or enhance the provision of specific benefits, while minimizing negative impacts to the environment. Defining a desired management itinerary to a forest depends on a variety of factors, including the forest type, its ecological characteristics, and the social and economic needs of local communities. A strategic assessment of the forest use suitability (FUS) (namely productive, protective, conservation-oriented, social and multi-functional) at regional level, based on the provision of forest ecosystem...AuthorsGoran Krsnik, Keith M. Reynolds, Philip Murphy, Steve Paplanus, Jordi Garcia-Gonzalo, José Ramón. González OlabarriaKeywordsSourceGeography and Sustainability. 4(4): 414-427.Year2023
- Systematic assessments of species extinction risk at regular intervals are necessary for informing conservation action1,2. Ongoing developments in taxonomy, threatening processes and research further underscore the need for reassessment3,4. Here we report the findings of the second Global Amphibian Assessment, evaluating 8,011 species for the International Union for Conservation of Nature Red List of Threatened Species. We find that amphibians are the most threatened vertebrate class (40.7% of species are globally threatened). The updated Red List Index shows that the status of amphibians...AuthorsBurhan Tjaturadi, Carlos C. Martínez Rivera, Carlos R. Vásquez Almazán, Celsa Señaris, S. R. Chandramouli, Christine Strüssmann, Claudia Fabiola Cortez Fernández, Claudio Azat, Conrad J. Hoskin, Craig Hilton-Taylor, Damion L. Whyte, David J. Gower, Deanna H. Olson, Diego F. Cisneros-Heredia, Diego José Santana, Elizah Nagombi, Elnaz Najafi-Majd, Evan S. H. Quah, Federico Bolaños, Feng Xie, Francisco Brusquetti, Francisco S. Álvarez, Franco Andreone, Frank Glaw, Franklin Enrique Castañeda, Fred Kraus, Gabriela Parra-Olea, Gerardo Chaves, Guido F. Medina-Rangel, Gustavo González-Durán, H. Mauricio Ortega-Andrade, Iberê F. Machado, Indraneil Das, Iuri Ribeiro Dias, J. Nicolas Urbina-Cardona, Jelka Crnobrnja-Isailović, Jian-Huan Yang, Jiang Jianping, Jigme Tshelthrim Wangyal, Jodi J. L. Rowley, John Measey, Karthikeyan Vasudevan, Kin Onn Chan, Kotambylu Vasudeva Gururaja, Kristiina Ovaska, Lauren C. Warr, Luis Canseco-Márquez, Luís Felipe Toledo, Luis M. Díaz, M. Monirul H. Khan, Madhava Meegaskumbura, Manuel E. Acevedo, Marcelo Felgueiras Napoli, Marcos A. Ponce, Marcos Vaira, Margarita Lampo, Mario H. Yánez-Muñoz, Mark D. Scherz, Mark-Oliver Rödel, Masafumi Matsui, Maxon Fildor, Mirza D. Kusrini, Mohammad Firoz Ahmed, Muhammad Rais, N’Goran G. Kouamé, Nieves García, Nono Legrand Gonwouo, Patricia A. Burrowes, Paul Y. Imbun, Philipp Wagner, Philippe J. R. Kok, Rafael L. Joglar, Renoir J. Auguste, Reuber Albuquerque Brandão, Roberto Ibáñez, Rudolf von May, S. Blair Hedges, S. D. Biju, S. R. Ganesh, Sally Wren, Sandeep Das, Sandra V Flechas, Sara L. Ashpole, Silvia J. Robleto-Hernández, Simon P. Loader, Sixto J. Incháustegui, Sonali Garg, Soumphthone Phimmachak, Stephen J. Richards, Tahar Slimani, Tamara Osborne-Naikatini, Tatianne P. F. Abreu-Jardim, Thais H. Condez, Thiago R. De Carvalho, Timothy P. Cutajar, Todd W. Pierson, Truong Q. Nguyen, Uğur Kaya, Zhiyong Yuan, Barney Long, Penny Langhammer, Simon N. Stuart, Jennifer A. Luedtke, Janice Chanson, Kelsey Neam, Louise Hobin, Adriano O. Maciel, Alessandro Catenazzi, Amaël Borzée, Amir Hamidy, Anchalee Aowphol, Anderson Jean, Ángel Sosa-Bartuano, Ansel Fong G., Anslem de Silva, Antoine Fouquet, Ariadne Angulo, Artem A. Kidov, Arturo Muñoz Saravia, Arvin C. Diesmos, Atsushi Tominaga, Biraj Shrestha, Brian GratwickeKeywordsSourceNature. 622(7982): 308-314.Year2023
- Widespread declines in breeding bird populations have been documented across North America since the 1970s, and concerns about loss of avian biodiversity are growing. Species with narrow habitat preferences are of particular conservation concern. Connecticut Warblers (Oporornis agilis) breed in forests in central Canada and around the western Great Lakes; throughout much of its breeding range, this species is associated with lowland black spruce (Picea mariana) and tamarack (Larix laricina) forests. Population trends of the Connecticut Warbler indicate it is one of the most rapidly...AuthorsAlexis Grinde, Stephen Kolbe, Kara Snow, Brett Howland, Gerald Niemi, Robert A. Slesak, Marcella Windmuller-CampioneSourceJournal of Field Ornithology. 94(4):2.Year2023
- Management and conservation efforts that support the recovery and protection of large rivers are daunting, reflecting the complexity of the challenge and extent of effort (in terms of policy, economic investment, and spatial extent) needed to afford measurable change. These large systems have generally experienced intensive development and regulation, compromising their capacity to respond to disturbances such as climate change or wildfire. Functionally, large river and basin management require insights gained from social, ecological, geophysical, and hydrological sciences. This multidiscip...AuthorsRebecca Flitcroft, Luke Whitman, James White, Rose Wallick, Laurel Stratton Garvin, Cassandra Smith, Robert Plotnikoff, Michael Mulvey, Tobias Kock, Krista Jones, Peter Gruendike, Carolyn Gombert, Guillermo Giannico, Andrew Dutterer, Daniel Brown, Hannah Barrett, Brian Bangs, Robert M. HughesKeywordsSourceWater Biology and Security. 2(4): 100203.Year2023
- White-headed Woodpeckers (Dryobates albolarvatus) are strongly associated with late-successional dry forest types. Callback surveys along transects are typically used to understand their status and trends in response to forest management. However, this survey method has proven to be logistically challenging because of the number of spatial and temporal replicate surveys needed to accurately interpret surveys that yield no detections. Passive acoustic recording units (ARUs) effectively detect certain avian species and may offer a more efficient and effective survey method, but few studies...AuthorsMarie Gaylord, Adam Duarte, Brenda McComb, Jamie RatliffKeywordsSourceJournal of Field Ornithology. 94(4):1.Year2023
- Value inclusion is critical for effective ecosystem science policy and largely emerged from critiques of the value-exclusionary attributes of ecological and economic approaches to value assessments and valuations. But whether and how value is excluded during social–scientific approaches to the assessments and valuations of ecosystem features has not received adequate attention. We identify and discuss instances of when and how value is excluded during social–scientific approaches to the assessments and valuations of ecosystem features to which people ascribe value. We illustrate the...AuthorsVirginie Maris, Stanley Asah, Sunneetha Subramanian, Dale Blahna, Marie Stenseke, Adrina Chacón-CascanteSourceBioScience. 73(9): 663-670.Year2023