Treesearch
Search National Treesearch
Displaying 191 - 200 of 7,080 Publications
- Many coastal forests stretching from central California to southwest Oregon are threatened or have been impacted by the invasive forest pathogen Phytophthora ramorum, the cause of sudden oak death. We analyzed a set of stand-level forest treatments aimed at preventing or mitigating disease impacts on stand composition, biomass, and fuels using a before–after-control-intervention experiment with a re-evaluation after 5 years. We compared the effects of restorative management for invaded stands and preventative treatments for uninvaded forests with two stand-level experiments. The restorative...AuthorsGissella B. Quiroga, Allison B. Simler-Williamson, Kerri M. Frangioso, Susan J. Frankel, David M. Rizzo, Richard C. CobbKeywordsSourceCanadian Journal of Forest Research. 53(12): 969-980Year2023
- The Sierra Nevada has experienced unprecedented wildfires and reduced snowmelt runoff in recent decades, due partially to anthropogenic climate change and over a century of fire suppression. To address these challenges, public land agencies are planning forest restoration treatments, which have the potential to both increase water availability and reduce the likelihood of uncontrollable wildfires. However, the impact of forest restoration on snowpack is site specific and not well understood across gradients of climate and topography. To improve our understanding of how forest restoration...AuthorsGabriel Lewis, Adrian Harpold, Sebastian A. Krogh, Patrick Broxton, Patricia N. ManleySourceEcohydrology. 16(7): e2580.Year2023
- Aim To provide the first regional analysis of contemporary drivers of Pacific Island fire regimes. Location Islands of Palau, Yap, Guam, Rota, Tinian, Saipan, Chuuk, Pohnpei, Kosrae. Time Period 1950-present. Methods We used land cover, soil maps and contemporary fire histories to (1) describe the relationships among fire activity, vegetation, rainfall and island geography and population; (2) examine the spatial associations of forest and savanna vegetation with respect to fire and soil types; and (3) link fire and savanna distribution to intra-annual and inter-annual rainfall variability....AuthorsClay Trauernicht, Abby G. Frazier, Julian Dendy, Ilan Bubb, Christine Camacho‐Fejeran, James B. Friday, Romina King, James Manglona, Francis Ruegorong, Ann Singeo, Christian P. Giardina, Susan CordellKeywordsSourceJournal of Biogeography. 43(2): 51.Year2023
- The decline in amphibian populations is one of the starkest examples of the biodiversity crisis. For stream breeding amphibians, alterations to natural flow regimes by dams, water diversions, and climate change have been implicated in declines and extirpations. Identifying drivers of amphibian declines requires long time series of abundance data because amphibian populations can exhibit high natural variability. Multiple population viability analysis (MPVA) models integrate abundance data and share information from different populations to estimate how environmental factors influence...AuthorsJonathan P. Rose, Sarah J. Kupferberg, Ryan A. Peek, Don Ashton, James B. Bettaso, Steve Bobzien, Ryan M. Bourque, Koen G. H. Breedveld, Alessandro Catenazzi, Joseph E. Drennan, Earl Gonsolin, Marcia Grefsrud, Andrea E. Herman, Matthew R. House, Matt R. Kluber, Amy J. Lind, Karla R. Marlow, Alan Striegle, Michael van Hattem, Clara A. Wheeler, Jeffery T. Wilcox, Kevin D. Wiseman, Brian J. HalsteadKeywordsSourceEcosphere. 14(8): 144.Year2023
- Rapid environmental changes—in climate, land use, and biotic interactions—are accelerating species extinctions and extirpations globally. Identifying drivers that threaten populations is essential for conservation yet can be difficult given the variable nature of the response of an organism to biotic and abiotic stressors. We analyzed a long-term monitoring data set to explore demographic responses of fishers (Pekania pennanti) to rapid environmental change in the southern Sierra Nevada, California, United States. Fisher survival was sensitive to both biotic and abiotic factors, although...AuthorsCorbin Kuntze, M Zachariah Peery, Rebecca Green, Kathryn Purcell, Jonathan Pauli, Alessio Mortelliti, Chrissy HowellKeywordsSourceJournal of Mammalogy. 105(1): 13-25.Year2023
- For temperate-zone mammals, seasonal changes in weather and food availability often govern energy allocation. In addition, energy allocation strategies usually differ between males and females. Bats are an interesting group in which to evaluate energetic trade-offs as they are highly mobile and lead energetically demanding lives in habitats across a variety of seasonally variable climates. We evaluated year-round changes in body mass and fuel load for three species of bats in northern California: Silver-haired Bat (Lasionycteris noctivagans), California Myotis (Myotis californicus), and...AuthorsTed Weller, Jeff Clerc, Matthew Lau, Nels G. Johnson, Thomas JungKeywordsSourceJournal of Mammalogy. 104(6): 1246-1256.Year2023
- One mechanism proposed to explain high species diversity in tropical systems is strong negative conspecific density dependence (CDD), which reduces recruitment of juveniles in proximity to conspecific adult plants. Although evidence shows that plant-specific soil pathogens can drive negative CDD, trees also form key mutualisms with mycorrhizal fungi, which may counteract these effects. Across 43 large-scale forest plots worldwide, we tested whether ectomycorrhizal tree species exhibit weaker negative CDD than arbuscular mycorrhizal tree species. We further tested for conmycorrhizal density...AuthorsJoseph A. LaManna, Jonathan A. Myers, Richard P. Phillips, Salomón Aguilar, Camille S. Delavaux, David Allen, Alfonso Alonso, Kristina J. Anderson-Teixeira, Matthew E. Baker, Jennifer L. Baltzer, Pulchérie Bissiengou, Mariana Bonfim, Norman A. Bourg, Warren Y. Brockelman, David F. R. P. Burslem, Li-Wan Chang, Yang Chen, Jyh-Min Chiang, Chengjin Chu, Keith Clay, Susan Cordell, Mary Cortese, Jan den Ouden, Christopher Dick, Sisira Ediriweera, Erle C. Ellis, Anna Feistner, Amy L. Freestone, Thomas Giambelluca, Christian P. Giardina, Gregory S. Gilbert, Fangliang He, Jan Holík, Robert W. Howe, Walter Huaraca Huasca, Stephen P. Hubbell, Faith Inman, Patrick A. Jansen, Daniel Johnson, Kamil Kral, Andrew J. Larson, Creighton M. Litton, James A. Lutz, Yadvinder Malhi, Krista McGuire, Sean M. McMahon, William J. McShea, Hervé Memiaghe, Anuttara Nathalang, Natalia Norden, Vojtech Novotny, Michael J. O’Brien, David A. Orwig, Rebecca Ostertag, Geoffrey G. Parker, Rolando Pérez, Glen Reynolds, Sabrina E. Russo, Lawren Sack, Pavel Šamonil, I-Fang Sun, Mark E. Swanson, Jill Thompson, Maria Uriarte, John Vandermeer, Xihua Wang, Ian Ware, George D. Weiblen, Amy Wolf, Shu-Hui Wu, Jess K. Zimmerman, Thomas Lauber, Daniel S. Maynard, Thomas W. Crowther, Colin AverillSourceCommunications Biology. 6(1): 1066Year2023
- Holarctic martens (genus Martes) are small carnivores that are considered functionally solitary, with both resource scarcity and martens' inability to store energetic reserves posited as precluding social behavior. Interactions between martens are expected to be largely agonistic with the exception of mating and rearing of kits by adult females. Nonetheless, we documented multiple instances of conspecific tolerance by Pacific martens (M. caurina) during long-term monitoring of radio-marked animals in 2 study populations. Observations from radio-tracking and remotely triggered camera trap...AuthorsMatthew S. Delheimer, Marie E. Martin, Katie MoriartySourceWestern North American Naturalist. 83(2): 277-282.Year2023
- Blue carbon refers to carbon captured by marine and coastal ecosystems, such as mangroves, coastal wetlands, and seagrasses. Coastal ecosystems sequester carbon at a much faster rate than terrestrial ecosystems, and the carbon stored belowground can remain in place for decades to millennia if undisturbed by humans or extreme events. Conservation and restoration of coastal ecosystems can play a role in reducing carbon dioxide accumulations in the atmosphere by increasing sequestration of blue carbonAuthorsAllison R. Crimmins, Christine L. May, Sarah R. Cooley, Erica Fleishman, Eric E. Grossman, Brian Helmuth, Richard A. MacKenzie, Daisy R. Ramirez Lopez, Emily WasleySourceFifth National Climate AssessmentYear2023
- For nearly two decades, stream baiting of northern and central California coastal streams has been an important tool in the management of sudden oak death, a devastating forest disease caused by the oomycete Phytophthora ramorum. Phytophthoraspecies are baited with floating rhododendron leaves, serving as an early detection tool for the presence of P. ramorumin watersheds across more than 800 km of California coastline. While this long-standing management tool is focused on a single species of Phytophthora, other species of Phytophthorahave been baited alongside P. ramorum, and this study...AuthorsTyler B. Bourret, Heather K. Mehl, Kamyar Aram, David M. RizzoKeywordsSourceMycological Progress. 22(8): 858Year2023