Results 21 to 30 of about 47,548 (258)

Timing and ecological priority shaped the diversification of sedges in the Himalayas [PDF]

PeerJ, 2019
Background Diversification patterns in the Himalayas have been important to our understanding of global biodiversity. Despite recent broad-scale studies, the most diverse angiosperm genus of the temperate zone—Carex L. (Cyperaceae), with ca. 2100 species
Uzma, Pedro Jiménez-Mejías, Rabia Amir, Muhammad Qasim Hayat, Andrew L. Hipp   +4 more
doaj   +2 more sources

Dauciform roots affect the position of the neighboring plants on the economic spectrum in degraded alpine meadows

Frontiers in Plant Science, 2023
Background and aimsSpecial root structures that can dissolve insoluble phosphorus locked in soil are supposed to contribute not only to the growing status of themselves but also to the neighbouring plants. However, whether dauciform roots have any effect
Rong Fan, Yulin Huang, Wanting Liu, Songlin Jiang, Wenli Ji   +4 more
doaj   +1 more source

Characterisation of Holocene plant macrofossils from North Spanish ombrotrophic mires: vascular plants [PDF]

Mires and Peat, 2016
Methods and criteria that were used to identify plant macrofossils from four ombrotrophic mires in northern Spain are presented. Twelve monocotyledon and ten dicotyledon species were recorded.
M. Souto, D. Castro, X. Pontevedra-Pombal, E. Garcia-Rodeja, M.I. Fraga   +4 more
doaj   +1 more source

Tres nuevos registros del genero Carex (Cyperaceae) para el Perú y adiciones a la flora andina del departamento de Huánuco

Revista Peruana de Biología, 2008
Tres nuevos registros para el Perú (Carex humahuacaensis G.A. Wheeler, Carex peucophila T. Holm y Carex pygmaea Boeck.) y 75 nuevos registros para la flora del departamento de Huánuco son dados a conocer.
Flor De María Salvador, María Ángeles Alonso, Segundo Ríos   +2 more
doaj   +1 more source

Assessing the viability of genebanked seeds from rare, wild plants native to the United States using the D.E.A.D. paradigm

Applications in Plant Sciences, EarlyView.
Abstract Premise Genebanks must maintain viable seeds for decades. Seeds that germinate are clearly alive, but some seeds, often from wild populations, do not germinate because they are dormant, empty, aged, or damaged (D.E.A.D.). This work evaluates the effects of D.E.A.D.
Christina Walters, Lisa M. Hill, Katherine D. Heineman, Hannah M. Tetreault, Shaimaa Ibrahim, Katherine Markstein, Cheryl Birker, Kris Freitag, Dustin Wolkis, Michael Kunz, Sheila Murray, Nathaniel Kingsley, Alexandra Seglias, Nicholas Matsumoto, Thomas N. Kaye, Cheryl Peterson, Matthew A. Albrecht, Noah Dell, Stacy Anderson, Steve Blackwell, David Remucal, Wendy Gibble, Anita Tiller, Emily Coffey, Jason Ligon, Laurie Blackmore, Carrie Radcliffe, Heather E. Schneider, Kristen Nelson, David Sollenberger, Jessamine Finch, Kate Wellspring, Robert Jetton, Joyce Maschinski   +33 more
wiley   +1 more source

Effect of long-term grazing on the contents of phenolic compounds in Carex and Aster plants in Mongolia

Mongolian Journal of Chemistry
Long-term grazing changes the plant diversity and their growth significantly. At the metabolite level, the contents and compositions of the specialized metabolic compounds in plants could also be altered under long-term grazing conditions.
Purevdorj Erdenetsogt, Nomin Munkhbat, Enkhriimaa Narmandakh, Tuvshintogtokh Idree, Chuan-Ming Yeh, Munkhtsetseg Tsednee   +5 more
doaj   +1 more source

On subset least squares estimation and prediction in vector autoregressive models with exogenous variables

Canadian Journal of Statistics, EarlyView.
Abstract We establish the consistency and the asymptotic distribution of the least squares estimators of the coefficients of a subset vector autoregressive process with exogenous variables (VARX). Using a martingale central limit theorem, we derive the asymptotic normal distribution of the estimators. Diagnostic checking is discussed using kernel‐based
Pierre Duchesne, Thanh‐Liem Huynh, Mylène Oscar   +2 more
wiley   +1 more source

Canadians’ knowledge of cancer risk factors and belief in cancer myths

BMC Public Health
Background Many untrue statements about cancer prevention and risks are circulating. The objective of this study was to assess Canadians’ awareness of known cancer risk factors and cancer myths (untruths or statements that are not completely true), and ...
E Rydz, J Telfer, EK Quinn, SS Fazel, E Holmes, G Pennycook, CE Peters   +6 more
doaj   +1 more source

Developing a macroecology for human‐altered ecosystems

Ecography, EarlyView.
Although anthropogenically‐induced ecological disruptions are fundamentally important in defining ecosystem properties, they are largely overlooked by macroecological theory. Anthropogenic disruptions and their effects are generally not comparable to one another, nor to disturbances that are part of natural disturbance regimes.
Erica A. Newman, Mark Q. Wilber, Alexandre Génin, Oriana E. Chafe, Henry F. Houskeeper, Steven Lee, Eric L. Berlow, John Harte   +7 more
wiley   +1 more source

Stilbenes in Carex acuta and Carex lepidocarpa

Molecules
Stilbenes in the roots of Carex acuta and Carex lepidocarpa were studied. Root samples were extracted with 100% methanol and analyzed by HPLC and LC-MS. In this way, trans-resveratrol dimers (m/z 455 Da [M + H]+), trimers (m/z 681 Da [M + H]+) and tetramers (m/z 907 Da [M + H]+) were identified in the extracts.
Jan Tříska, Naděžda Vrchotová, Štěpán Horník, Jan Sýkora, Andrea Kučerová   +4 more
openaire   +4 more sources