Treesearch
Displaying 4,701 - 4,710 of 65,047 Publications- For centuries, the Caribbean island of Puerto Rico has been subjected to the introduction of nonnative plant species. Various human-related activities such as agriculture, horticulture, and ornamental landscaping have resulted in the naturalization of numerous species, some of which are now representative of the island’s natural landscape. Recent floristic surveys in anthropized areas across the island yielded three new non-native plant records. We present the first reports with vouchers of Asystasia gangetica (L.) T. Anderson subsp. micrantha (Nees) Ensermu, Emilia praetermissa Milne-Redh....AuthorsSteve Maldonado-Silvestrini, Johann D. Crespo-Zapata, William A. GouldKeywordsSourceActa CientificaYear2023
- A basic tenant of ecological stoichiometric theory applied to plant nutrition is that, in the absence of metabolic selection of elements, plants should reflect their soil environment. We used ecological and stoichiometric data to gain insight into how stoichiometry might influence the productivity of primary and secondary forest stands dominated by native tree species. The study involved 2 sets of measurements of soil and litter stoichiometry 26 years apart plus results from long-term ecological research in similar forest types and watersheds in the vicinity of our study area within the...AuthorsAriel Lugo, Mary Jean Sanchez, Luz S. Betancourt, Olga Ramos, Ivan VicensSourceCaribbean NaturalistYear2023
- In the eastern United States, the use of prescribed fire as a silvicultural technique to manage for desirable upland tree species is increasing in popularity. Bark physical properties such as thickness, density, and porosity have known associations with fire tolerance among species. These physical properties simultaneously influence rainfall interception and canopy storage and thus are of interest across a range of disciplines. Furthermore, while these characteristics are innate to a species, it is unknown whether repeated exposure to fire facilitates physical change in bark structure and...AuthorsCourtney Siegert, Anna Ilek, Adam Wade, Callie SchweitzerKeywordsSourceHydrological ProcessesYear2023
- Mobile acoustic surveys allow estimates of overall bat activity, relative abundance, and species richness across large areas. Protocols for estimating relative abundance recommend using non-sinuous routes to ensure individual bats are only recorded once. We conducted mobile acoustic surveys along 12 sinuous routes in the mountainous terrain of northeastern Tennessee. Our objectives were to 1) determine if more calls were recorded in sinuous segments of mobile survey routes, thus violating assumptions of mobile surveys, and 2) analyze mobile transect data to assess bat habitat use. To test...AuthorsVanessa Rojas, Susan Loeb, Joy O'KeefeKeywordsSourceWildlife Society BulletinYear2023
- Mounting evidence suggests that climate change will cause shifts of tree species range and abundance (biomass). Abundance changes under climate change are likely to occur prior to a detectable range shift. Disturbances are expected to directly affect tree species abundance and composition, and could profoundly influence tree species spatial distribution within a geographical region. However, how multiple disturbance regimes will interact with changing climate to alter the spatial distribution of species abundance remains unclear. We simulated such forest demographic processes using a...AuthorsYu Liang, Eric J. Gustafson, Hong S. He, Josep M. Serra‐Diaz, Matthew J. Duveneck, Jonathan R. ThompsonKeywordsSourceGlobal Change BiologyYear2023
- The future health and productivity of tree species in the northern hardwood forest of eastern North America are uncertain considering changes in climate and pollution loading there. To better understand the trajectory of the northern hardwood forest, we studied the growth of three tree species emblematic of it: sugar maple (Acer saccharum Marsh), American beech (Fagus grandifolia Ehrh.), and yellow birch (Betula alleghaniensis Britton), plus a fourth species, red maple (Acer rubrum L.), whose abundance has increased in the region. We also analyzed the link between growth and several...AuthorsRebecca L. Stern, Paul Schaberg, Shelly A. Rayback, Christopher F. Hansen, Paula Murakami, Gary J. HawleyKeywordsSourceJournal of Forestry ResearchYear2023
- The pursuit of ungulates as game animals, whether for recreation, cultural tradition, or meat, is a dominant activity on public and private lands in North America and much of the world. Strategic regulation of hunting is key for managing game population abundance, age and sex structure, and distribution, with harvest rates a function of both hunter success and participation. Hunter satisfaction is often linked to success and ultimately with hunter recruitment and retention, a growing concern for wildlife agencies. Yet knowledge is lacking about what hunter characteristics or behaviors are...AuthorsMary M. Rowland, Ryan M. Nielson, Michael Wisdom, Darren A. Clark, Guy T. DiDonato, Jennifer Hafer, Bridgett Naylor, Bruce K. JohnsonKeywordsSourceWildlife Society Bulletin. 47(2): 796-821.Year2023
- We conducted a range-wide investigation of the dynamics of site-level reproductive rate of northern spotted owls using survey data from 11 study areas across the subspecies geographic range collected during 1993–2018. Our analytical approach accounted for imperfect detection of owl pairs and misclassification of successful reproduction (i.e., at least one young fledged) and contributed further insights into northern spotted owl population ecology and dynamics. Both nondetection and state misclassification were important, especially because factors affecting these sources of error also...AuthorsJeremy T. Rockweit, Julianna M. Jenkins, James E. Hines, James D. Nichols, Katie M. Dugger, Alan B. Franklin, Peter C. Carlson, William L. Kendall, Damon B. Lesmeister, Christopher McCafferty, Steven H. Ackers, L. Steven Andrews, Larissa L. Bailey, Jesse Burgher, Kenneth P. Burnham, Tara Chestnut, Mary M. M. Conner, Raymond J. Davis, Krista E. Dilione, Eric D. Forsman, Elizabeth M. Glenn, Scott A. Gremel, Keith A. Hamm, Dale R. Herter, J. Mark Higley, Rob B. Horn, David W. Lamphear, Trent L. McDonald, Janice A. Reid, Carl J. Schwarz, David C. Simon, Stan Sovern, James K. Swingle, J. David Wiens, Heather Wise, Charles B. YackulicKeywordsSourceEcological Applications. 33(1): 1050-.Year2023
- A small imbalance in plant productivity and decomposition accounts for the carbon (C) accumulation capacity of peatlands. As climate changes, the continuity of peatland net C storage relies on rising primary production to offset increasing ecosystem respiration (ER) along with the persistence of older C in waterlogged peat. A lowering in the water table position in peatlands often increases decomposition rates, but concurrent plant community shifts can interactively alter ER and plant productivity responses. The combined effects of water table variation and plant communities on older peat...AuthorsJulia E. M. Stuart, Colin Tucker, Erik Lilleskov, Randy Kolka, Rodney A. Chimner, Katherine A. Heckman, Evan KaneSourceGlobal Change BiologyYear2023
- The 1980 volcanic eruption of Mount St. Helens had profound impacts on the geology, hydrology, and ecology of its surrounding landscapes. Consequently, the event provided a unique opportunity to study ecological change over time in relation to abiotic factors. To better assess the role localized environmental conditions play in these larger processes, we have monitored micrometeorological conditions across 6 disturbance zones on Mount St. Helens created by the eruption. We deployed 823 environmental sensors at 191 sites from 1997-2022 to measure the temperature and relative humidity of...AuthorsChristian Che‐Castaldo, Charlie CrisafulliKeywordsSourceEcology. 104(3): e3950.Year2023