Digital Commons Network^™

Genetic Diversity Analysis Reveals Weak Population Structure In Invasive Trianthema Portulacastrum L. At Fayoum Depression, Egypt, Faten Ellmouni, Dirk Albach, Mai Sayed Fouad, Marwa Fakhr

Turkish Journal of Botany

Trianthema portulacastrum L. (Aizoaceae) is a common weed associated with cultivated crops. It is an exotic weed that originated in South Africa and is spreading all over the world. Thirty-five accessions were collected from six populations at Fayoum depression (FD), Egypt. Molecular analyses of start codon targeted (SCoT) markers were performed to identify genotypic variation among collected populations. The effectiveness of employing SCoT markers was demonstrated by the high percentage of polymorphisms. These markers revealed high genetic diversity, as well as high levels of genetic differentiation (GST), elevated gene flow (Nm) (0.195 and 2.052, respectively), high variation among a population …

In A Different Light, News And Communications Services

Seek

Kansas State University’s Applied Aviation Research Center captured aerial photos of Manhattan, Kansas — including the university’s athletics complex — with a near-infrared camera in search of an invasive plant, bush honeysuckle.

Early Detection Rapid Response Program Targets New Noxious Weed Species In Washington State, Jennifer E. Andreas, Alison D. Halpern, Wendy C. Descamp, Timothy W. Miller

The Journal of Extension

Early detection, rapid response is a critical component of invasive plant management. It can be challenging, however, to detect new invaders before they become established if landowners cannot identify species of concern. In order to increase awareness, eye-catching postcards were developed in Washington State as part of a noxious weed educational campaign. Plant identification, potential impacts, and current distributions are provided in a simple format for easy information consumption. Postcards are distributed across the state at various venues, thereby increasing the general public's exposure to little known but high risk species.

Exploring The Mechanisms Of Allelopathic Interaction In The Invasive Annual Plant, Phyllanthus Urinaria, Alyssa L. Smith, Andrew R. Dyer

Journal of the South Carolina Academy of Science

The belowground mechanisms facilitating invasion and proliferation of non-native plant species into natural communities are of critical importance for understanding plant invasions. Research on allelopathy suggests that some exotic plant species produce compounds via root exudates that may suppress or inhibit the growth of neighboring plants, but the specific mechanisms and consequences of these plant-chemical interactions remain elusive. In an effort to understand the abiotic and biotic factors governing allelopathic activity, a two-part greenhouse experiment was designed to examine plant-soil interactions of the invasive euphorb, Phyllanthus urinaria, and the residual soil effects of these interactions on subsequent growth of …

Gene Flow In An Invasive Species Of Grass, Brachypodium Sylvaticum, Trieste Dobberstein

PSU McNair Scholars Online Journal

Invasive species of plants are responsible for a staggering amount of damage to the landscape and floral and faunal communities. Invasions remain largely ignored until invasive populations have reached critical levels, at which point costly and time consuming efforts are required for containment or control. Studying the early stages of an invasion can provide insight into the mechanics behind the establishment and spread of invaders, as well as shed more light on the processes of microevolution. Brachypodium sylvaticum is a grass recently invasive to the Willamette Valley, and possesses many traits valuable to a migration and evolutionary study. This study …

Microbial Biomass And Nitrogen Availability Under The Invasive Plant Species Lonicera Japonica And Native Grasses In Wetland Soil, Kimberly R. Payne, Mary C. Savin, Peter J. Tomlinson

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

Invasive plants decrease aboveground biodiversity and suitable wildlife habitat. Wetlands are especially valuable ecosystems because they provide habitat, floodwater control, and function as filters for urban runoff. Wetland soils also act as sinks for nutrients. This characteristic reduces levels of excess nutrients often found in adjacent aquatic systems. The importance of soil functions in wetlands necessitates further investigation of the effects of invasive species on belowground nutrient pools. Approximately 75% of a small neighborhood wetland located in Fayetteville, Ark., has been invaded by Lonicera japonica. The effects of L. japonica and its replacement with native grasses on soil microbial biomass …

An Overview And Management Plan Of Iowa's Non-Native, Invasive, Terrestrial Forbs, Deborah Q. Lewis, Richard O. Pope

Journal of the Iowa Academy of Science: JIAS

Non-native, invasive forb species have been a problem in Iowa since the earliest decades of Iowa's European settlement. The history of studies of Iowa's invasive plants began with L. H. Pammel, and these studies continue to present. Three tables cite the occurrence of many of these species in the state, with Table 1 listing 93 non-native forbs reported by Pammel, Table 2 citing ten invasive forbs of natural areas, and Table 3 adding 38 observed or potential aggressive species of Iowa's anthropogenic and natural areas.

There has been a divergence of interest and research in the management of invasive species …

Exotic And Invasive Woody Plant Species In Iowa, Donald R. Farrar

Journal of the Iowa Academy of Science: JIAS

Seventy species and hybrids of exotic woody trees, shrubs, and vines have naturalized in Iowa. Nearly half of these species (31) have become invasive pests in parts of the state or have potential do so. Most of the seriously invasive species are spread by bird ingestion of whole fruits. Widespread dispersal by birds hinders eradication efforts and should be considered a trait indicative of potential invasiveness. The economic and ecological values of Iowa forests are seriously compromised by exotic invasive woody species, especially where forests recovering from cropland and pasture are dominated by exotic species. Thus, a simple measure of …