Absorption and translocation of [14C]glyphosate in four woody plant species

1992 ◽  
Vol 22 (6) ◽  
pp. 785-789 ◽  
Author(s):  
Thomas H. Green ◽  
Patrick J. Minogue ◽  
Charles H. Brewer ◽  
Glenn R. Glover ◽  
Dean H. Gjerstad
Keyword(s):  
United States ◽  
Loblolly Pine ◽  
Woody Plants ◽  
Woody Plant ◽  
Southeastern United States ◽  
Herbicide Tolerance ◽  
Woody Species ◽  
Red Maple ◽  
White Oak ◽  
Foliar Absorption

Absorption and translocation patterns of radio-labelled glyphosate (N-(phosphonomethyl)glycine) were examined in four species of woody plants to determine mechanisms of herbicide tolerance in species common to the southeastern United States. Loblolly pine (Pinustaeda L.) and yaupon (Ilexvomitoria (L.) Ait.), both tolerant to the herbicide, absorbed significantly less glyphosate than did red maple (Acerrubrum L.) or white oak (Quercusalba L.), indicating the importance of foliar absorption as a barrier to glyphosate entry. Although herbicide absorption was similar between the sensitive white oak and the tolerant red maple, white oak accumulated more glyphosate in the roots than did red maple, indicating that translocation patterns also contribute significantly to glyphosate tolerance in some woody species.

Economics of intercropping loblolly pine and switchgrass for bioenergy markets in the southeastern United States

2012 ◽  
Vol 86 (2) ◽  
pp. 287-298 ◽  
Author(s):  
Andres Susaeta ◽  
Pankaj Lal ◽  
Janaki Alavalapati ◽  
Evan Mercer ◽  
Douglas Carter
Keyword(s):  
United States ◽  
Loblolly Pine ◽  
Southeastern United States

scholarly journals Early indications of drought impacts on forests in the southeastern United States

2015 ◽  
Vol 91 (04) ◽  
pp. 376-383 ◽  
Author(s):  
Michael K. Crosby ◽  
Zhaofei Fan ◽  
Martin A. Spetich ◽  
Theodor D. Leininger ◽  
Xingang Fan
Keyword(s):  
United States ◽  
Forest Type ◽  
Southeastern United States ◽  
Forest Health ◽  
Classification And Regression Tree ◽  
Future Research ◽  
Red Oak ◽  
White Oak ◽  
Cart Analysis ◽  
Crown Dieback

In the southeastern United States, drought can pose a significant threat to forests by reducing the amount of available water, thereby stressing trees. Destructive changes in crown conditions provide the first visible indication of a problem in a forested area, making it a useful indicator for problems within an ecosystem. Forest Health and Monitoring (FHM) and Palmer's Drought Severity Index (PDSI) data from 11 states in the southeastern United States were obtained in an effort to determine the role that drought, forest type, and ecoregion have in indicating differences in crown dieback. Analyses were conducted by species groups using classification and regression tree (CART) analysis. The greatest amount of total relative crown dieback occurred in red oak (18%), followed by other hardwoods (14%), and white oak (11%). Relative crown dieback varied by forest type and ecoregion with a relationship to drought in both red oak and white oak. This information will be useful for focusing future research and modeling efforts to predict forest health conditions affected by changing climate variables.

scholarly journals Alien and native woody plants in scattered vegetation in agricultural landscape

2020 ◽  
Vol 47 (2) ◽  
pp. 109-120
Author(s):  
Ján Supuka ◽  
Attila Tóth ◽  
Mária Bihuňová ◽  
Martina Verešová ◽  
Karol Šinka
Keyword(s):  
Tree Species ◽  
Woody Plants ◽  
Agricultural Landscape ◽  
Woody Plant ◽  
Robinia Pseudoacacia ◽  
Woody Species ◽  
Fruit Trees ◽  
Lycium Barbarum ◽  
Dominance Index ◽  
Acer Campestre

AbstractThe woody plant species composition has been evaluated in three cadastral territories of southwestern Slovakia, together in 77 habitats of non-forest woody vegetation (NFWV). A total of 43 tree species have been identified; 8 of them were alien and 5 species were cultural fruit trees. In total 20 shrub species were identified, out of which 3 were alien. Three woody species are classified as invasive according to the law in Slovakia: Acer negundo L., Ailanthus altissima (Mill.) Swingle, and Lycium barbarum L. They occurred only in 2, maximum in 4 of the evaluated habitats. The most occurring alien tree species Robinia pseudoacacia L. was generally identified in 58 habitats and in 48 habitats, with an incidence over 40% and dominance index of 70.6. The second most occurring alien tree Populus × canadensis had a dominance index of 8.3. The dominant native trees in NFWV were Acer campestre L., Fraxinus excelsior L., Quercus robur L., Salix fragilis L. with the dominance index of 1–5 only.

Termitaria as browsing hotspots for African megaherbivores in miombo woodland

2004 ◽  
Vol 20 (3) ◽  
pp. 337-343 ◽  
Author(s):  
John P. Loveridge ◽  
Stein R. Moe
Keyword(s):  
Woody Plants ◽  
Woody Plant ◽  
Woody Species ◽  
Acacia Nilotica ◽  
Termite Mound ◽  
Miombo Woodland ◽  
Termite Mounds ◽  
Dichrostachys Cinerea ◽  
Colophospermum Mopane ◽  
Mound Construction

Thirteen termite mounds and 13 similar-sized control plots were surveyed in central Zimbabwe in order to study large mammalian browsing and vegetation characteristics. The mounds supported almost twice as many tree species as the control plots and the woody vegetation was denser on mounds compared with the woodland plots. Species of woody plants were recorded along with the percentage of branches browsed (cumulative browsing score) by black rhino, Diceros bicornis, elephant, Loxodonta africana and other browsers combined. In addition we measured how the cumulative browsing score on three woody plant species, Acacia nilotica, Colophospermum mopane and Dichrostachys cinerea, which were common both on and off mounds, was related to the distance from mound centre. Both black rhino and elephant cumulative browsing scores were significantly higher on the mound plants compared with the woodland plots. Cumulative browsing score was negatively related to distance from the mound centre for Dichrostachys cinerea, Colophospermum mopane and Acacia nilotica. We propose that termite mound construction in miombo woodland contributes to sustaining populations of megaherbivores and perhaps some woody species in these areas.

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