Treesearch
Displaying 7,481 - 7,490 of 65,188 Publications- High-elevation peatlands in the Andes are receiving increasing attention for their biodiversity and their high rates of carbon accumulation. However, the ecology of these peatlands and the environmental factors that control their carbon dynamics remain under-studied. Here we report on the patterns of root biomass productivity and turnover rates for two cushion plant species (Distichia muscoides, Plantago rigida) that commonly dominate high-elevation peatlands (> 4200 m a.s.l.) in the Andean páramo landscape of Northern Ecuador. Root biomass for P. rigida ranged from 680 to 864 g m-2 and...AuthorsEsteban Suárez, Segundo Chimbolema, Rodney A. Chimner, Erik LilleskovKeywordsSourceMires and Peat. 27: Article 18. 9 p.Year2021
- Following timber harvests in bottomland mixed-oak (Quercus L.) stands, desirable oak advance regeneration can be overgrown by shade-intolerant pioneer species. We investigated the effects of group selection opening size on composition of tree regeneration 19 years postharvest in an oak-dominated bottomland forest and compared results with earlier findings to evaluate development trends. In response to six opening sizes (7–40 m radii), we evaluated regeneration density and dominance of four tree species groups: conifers, hard mast, shade-intolerant hardwoods, and shade-tolerant hardwoods....AuthorsHenry McNab, John Kilgo, John I Blake, Stanley J. ZarnochKeywordsSourceCanadian Journal of Forest ResearchYear2021
- As arborists and urban foresters, we are hired for our knowledge of trees and forest management. But trees are part of an ecosystem, and we know they cannot thrive unless the conditions around them are optimal for growth. The Forest Service has learned a tremendous amount about best management practices through the study of biodiversity and urban forest habitats for birds and bees; this article will highlight some of these findings and their implications for those of us seeking to grow healthy and thriving trees and forests.AuthorsSusannah B. Lerman, Vince D'Amico, Phillip RodbellSourceCity Trees. July/August: 34-37.Year2021
- Individual identification of animals from camera traps has become an important task in wildlife research, but camera deployment methods often do not facilitate this important undertaking. Identification of individual golden eagles (Aquila chrysaetos) is possible using uniquely marked rectrices, but no studies have explored methods to maximize the rate of individual identification from camera images. Our objectives were to assess whether different camera heights (1 m vs. 3 m), image capture settings (one image after a 1‐min delay vs. burst of 5 images after a 30 sec delay), and arrangements...AuthorsMark Vukovich, James Garabedian, Stanley J. Zarnoch, John KilgoSourceWildlife Society BulletinYear2021
- Field monitoring of urban trees is essential to learning how urban forests change over time. Many arborists and urban forest managers worldwide seek to understand how their tree systems are faring in terms of growth, health, and mortality. How successful is an urban tree planting program with respect to mortality and survival? Has the tree species composition or total number of trees changed across a city or neighborhood? How much have the trees themselves grown? Long-term data collection can provide valuable information for urban forestry practitioners and researchers interested in these...AuthorsNatalie S. van Doorn, Lara RomanSourceArborist News. 30(3): 46-51.Year2021
Evaluation of long-term shortleaf pine progeny tests in the Ouachita and Ozark National Forests, USA
Between the late 1970s and the early 1990s, the USDA Forest Service installed 155 shortleaf pine (Pinus echinata Mill.) progeny tests in national forests across the Southern Region of the United States. Using control-pollinated crosses from the Mount Ida Seed Orchard, 84 of these progeny tests were established in the Ouachita and Ozark-St. Francis National Forests in Arkansas and Oklahoma. Each of these 84 test locations had, on average, 33 full-sibling families representing three local geographic seed sources (East Ouachita, West Ouachita, and Ozark). Though largely abandoned years ago,...AuthorsShaik M. Hossain, Don C. Bragg, Virginia McDaniel, Carolyn C. Pike, Barbara S. Crane, C. Dana NelsonKeywordsSourceForestsYear2021- Arbuscular mycorrhizal (AM) and ectomycorrhizal (EcM) associations are critical for host-tree performance. However, how mycorrhizal associations correlate with the latitudinal tree beta-diversity remains untested. Using a global dataset of 45 forest plots representing 2,804,270 trees across 3840 species, we test how AM and EcM trees contribute to total beta-diversity and its components (turnover and nestedness) of all trees. We find AM rather than EcM trees predominantly contribute to decreasing total beta-diversity and turnover and increasing nestedness with increasing latitude, probably...AuthorsYonglin Zhong, Chengjin Chu, Jonathan A. Myers, Gregory S. Gilbert, James A. Lutz, Jonas Stillhard, Kai Zhu, Jill Thompson, Jennifer L. Baltzer, Fangliang He, Joseph A. LaManna, Stuart J. Davies, Kristina J. Aderson-Teixeira, David F.R.P. Burslem, Alfonso Alonso, Kuo-Jung Chao, Xugao Wang, Lianming Gao, David A. Orwig, Xue Yin, Xinghua Sui, Zhiyao Su, Iveren Abiem, Pulchérie Bissiengou, Norm Bourg, Nathalie Butt, Min Cao, Chia-Hao Chang-Yang, Wei-Chun Chao, Hazel Chapman, Yu-Yun Chen, David A. Coomes, Susan Cordell, Alexandre A. de Oliveira, Hu Du, Suqin Fang, Christian P. Giardina, Zhanqing Hao, Andrew Hector, Stephen P. Hubbell, David Janík, Patrick A. Jansen, Mingxi Jiang, Guangze Jin, David Kenfack, Kamil Král, Andrew J. Larson, Buhang Li, Xiankun Li, Yide Li, Juyu Lian, Luxiang Lin, Feng Liu, Yankun Liu, Yu Liu, Fuchen Luan, Yahuang Luo, Keping Ma, Yadvinder Malhi, Sean M. McMahon, William McShea, Hervé Memiaghe, Xiangcheng Mi, Mike Morecroft, Vojtech Novotny, Michael J. O’Brien, Jan den Ouden, Geoffrey G. Parker, Xiujuan Qiao, Haibao Ren, Glen Reynolds, Pavel Samonil, Weiguo Sang, Guochun Shen, Zhiqiang Shen, Guo-Zhang Michael Song, I-Fang Sun, Hui Tang, Songyan Tian, Amanda L. Uowolo, María Uriarte, Bin Wang, Xihua Wang, Youshi Wang, George D. Weiblen, Zhihong Wu, Nianxun Xi, Wusheng Xiang, Han Xu, Kun Xu, Wanhui Ye, Mingjian Yu, Fuping Zeng, Minhua Zhang, Yingming Zhang, Jess K. Zimmerman, Li ZhuSourceNature Communications. 12(1): 3137Year2021
- In the past, the wood products industry has often struggled with effectively marketing products to the public. With the increase of globalization and wood substitutions, the industry may need new ways to attract customers. Targeting younger customers who have recently joined the buyer's market may be a way to increase the industry's market share and customer base. A study was conducted to understand the millennial generation's (individuals born from 1980 to 2000) knowledge and perception of wood products. In 2018, an online survey was distributed to over 1,500 millennial-aged individuals...AuthorsIris B. Montague, Kassandra Stout, Rubin ShmuslskyKeywordsSourceForest Products Journal. 71(2): 150-160.Year2021
- In the past decade, several dedicated tools have been developed to help natural resources professionals integrate climate science into their planning and implementation; however, it is unclear how often these tools lead to on-the-ground climate adaptation. Here, we describe a training approach that we developed to help managers effectively plan to execute intentional, climate-informed actions. This training approach was developed through the Climate Change Response Framework (CCRF) and uses active and focused work time and peer-to-peer interaction to overcome observed barriers to using...AuthorsKristen M. Schmitt, Todd A. Ontl, Stephen Handler, Maria Janowiak, Leslie Brandt, Patricia R. Butler-Leopold, P. Danielle Shannon, Courtney L. Peterson, Chris SwanstonKeywordsSourceClimateYear2021
- A new species of Pronura from the Luquillo Experimental Forest on Northeastern Puerto Rico is described and illustrated.Pronura yunquensis sp. nov. differs from other Neotropical Pronura in the absence of eyes and can be separated fromother species of the genus by the presence of a head tubercle (De), the displacement of Di1 in Abd IV and the fusedtubercles De+DL in Abd V. A key for identification to American species of Paramanura, Pronura and Paleonura isincluded.AuthorsClaudia M. Ospina-Sanchez, Jose G. Palacios-Vargas, Grizelle GonzalezKeywordsSourceZootaxaYear2021