Topic
Cerastium
About: Cerastium is a research topic. Over the lifetime, 107 publications have been published within this topic receiving 1855 citations.
Papers published on a yearly basis
Papers
TL;DR: Compared with the surrounding pasture, the mounds have a shorter vegetation, greater dunging pressure from rabbits, and a drier soil with more bare patches, smaller structural aggregates, a lower bulk density and greater extremes of temperature.
Abstract: SUMMARY (1) Ant-hills built by Lasius flavus (F.) occur frequently in permanent grasslands in southern Britain and bear a distinctive flora. (2) The vegetation of large ant-hills was compared with that of the surrounding grassland at thirteen chalk grassland and chalk heath sites in southern England. At each site, the percentage cover of each species was estimated on eight mounds and in eight associated pasture quadrats. (3) Most plant species showed consistent patterns in relation to ant-hills. (4) Annuals, particularly Arenaria serpyllifolia, were often confined to ant-hills. The perennial chamaephytes Cerastium holosteoides, Helianthemum chamaecistus and Thymus drucei were also significantly more abundant on the mounds (P < 005). (5) Of the species which were equally abundant on and around the ant-hills, some, like Agrostis stolonifera, Campanula rotundifolia, Festuca rubra and Galium verum, are stoloniferous and able to grow up through soil heaped onto the surface of the mounds by the ants, and others, such as Euphrasia officinalis agg., Gentianella amarella, Linum catharticum and Medicago lupulina, are short-lived and able to flower on the anthills. (6) The perennial herbs Carexflacca, Cirsium acaule, Filipendula vulgaris, Hieracium pilosella, Leontodon hispidus, Plantago lanceolata, P. media, Poterium sanguisorba, Succisa pratensis and Trifolium pratense, together with the tufted perennial grasses Dactylis glomerata, Helictotrichon pratense and Zerna erecta, were among the species which were significantly more abundant in the pasture than on the mounds (P< 0 05). (7) The differences in environment between ant-hills and the surrounding grassland are discussed in detail. Soil analyses showed no large or consistent differences in nutrient content between ant-hill and pasture soils. Compared with the surrounding pasture, the mounds have a shorter vegetation, greater dunging pressure from rabbits, and a drier soil with more bare patches, smaller structural aggregates, a lower bulk density and greater extremes of temperature.
153 citations
TL;DR: Root architecture and fine particle dynamics in the soil may explain the behaviour of the different species along the chronosequence and the dominance of Azorella selago (Apiaceae) in the oldest community.
Abstract: Primary succession was studied on recently de- glaciated areas in front of the Ampere Glacier, Kerguelen Islands (49? 30' S, 69? 30' E). Vegetation, colonization proc- esses and soil development were investigated on seven sites on the outwash plain over a distance of 5 km and representing a > 200-yr old chronosequence. Seven species are involved in the succession, showing four patterns of change: (1) 'pioneer' (Poa kerguelensis, Poa annua, Colobanthus kerguelensis and Ceras- tiumfontanum); (2) 'intermediate' (Festuca contracta); (3) 'late colonizer' (Azorella selago); and (4) 'fluctuating' (Agrostis magellanica). Two of the pioneers are introduced species (Poa annua and Cerastium). The total plant cover increases signifi- cantly with the age of the sites but never exceeds 4.2 %. The plant succession pattern observed in this study appears to be related to soil development. Root architecture and fine particle dynamics in the soil may explain the behaviour of the different species along the chronosequence. The pioneer species have a very shallow root system whereas the intermediate and late colonizers are deeper and longer rooted. The dominance of Azorella selago (Apiaceae) in the oldest community may be attributed to its unique root system in relation to the vertical distribution of silt cappings in the soil.
150 citations
TL;DR: The findings document the relative potential of a number of common annual, biennial, and perennial plant species to act as important reproductive sites for F. fusca and as acquisition sources of TSWV for spread to susceptible crops.
Abstract: Wild plant species were systematically sampled to characterize reproduction of thrips, the vector of Tomato spotted wilt virus (TSWV), and natural sources TSWV infection. Thrips populations were monitored on 28 common perennial, biennial, and annual plant species over two noncrop seasons at six field locations across North Carolina. Sonchus asper, Stellaria media, and Taraxacum officianale consistently supported the largest populations of immature TSWV vector species. The tobacco thrips, Frankliniella fusca, was the most abundant TSWV vector species collected, comprising over 95% of vector species in each survey season. Perennial plant species (i.e., Plantago rugelii and Taraxacum officianale) were often only locally abundant, and many annual species (Cerastium vulgatum, Sonchus asper, and Stellaria media) were more widely distributed. Perennial species, including P. rugelii and Rumex crispus, remained TSWV infected for 2 years in a small-plot field test. Where these perennial species are locally abundant, they may serve as important and long-lasting TSWV inoculum sources. In random surveys across 12 locations in North Carolina, TSWV infection was documented by double antibody sandwich enzyme-linked immunosorbent assay in 35 of 72 (49%) common perennial (N = 10), biennial (N = 4), and annual (N = 21) plant species across 18 plant families. Estimated rates of TSWV infection were highest in Cerastium vulgatum (4.2%), Lactuca scariola (1.3%), Molluga verticillata (4.3%), Plantago rugelii (3.4%), Ranunculus sardous (3.6%), Sonchus asper (5.1%), Stellaria media (1.4%), and Taraxacum officianale (5.8%). Nine plant species were determined to be new host recordings for TSWV infection, including Cardamine hirsuta, Eupatorium capillifolium, Geranium carolinianum, Gnaphalium purpureum, Linaria canadense, Molluga verticillata, Pyrrhopappus carolinianus, Raphanus raphanistrum, and Triodanis perfoliata. Our findings document the relative potential of a number of common annual, biennial, and perennial plant species to act as important reproductive sites for F. fusca and as acquisition sources of TSWV for spread to susceptible crops.
142 citations
TL;DR: The germination of imbibed seeds of Arenaria serpyllifolia L., Veronica arvensis L. and Cerastium holosteoides Fr.
Abstract: SUMMARY
The germination of imbibed seeds of Arenaria serpyllifolia L., Veronica arvensis L. and Cerastium holosteoides Fr. is inhibited under two layers of Tilia×europaea L. leaves. The ecological significance of this phenomenon is discussed.
105 citations
TL;DR: Analysis of molecular variance showed that most of the genetic diversity exists among populations for both varieties and that preservation of only a part of the population is insufficient to conserve C. fischerianum var.
Abstract: Random amplified polymorphic DNA (RAPD) analysis was used to assess the level of genetic diversity in an endangered plant Cerastiumfischerianum var. molle and the widespread conspecific C. fischerianum var. fischerianum. At both the variety and the population level, C. fischerianum var. molle had a lower level of RAPD variation than var. fischerianum. Analysis of molecular variance ( AMOVA) showed that most of the genetic diversity exists among populations for both varieties. Genetic differentiation among populations probably resulted from the highly selfing habits of both varieties. To conserve C. fischerianum var. molle genetically, preservation of only a part of the population is insufficient.
76 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 4 |
| 2020 | 4 |
| 2019 | 3 |
| 2018 | 6 |
| 2017 | 2 |
| 2016 | 2 |