Bibliografie tematiche / Flora plant

Indice

Articoli di riviste
Tesi
Libri
Capitoli di libri
Atti di convegni
Rapporti di organizzazioni

Letteratura scientifica selezionata sul tema "Flora plant"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 17 febbraio 2022

Cita una fonte nei formati APA, MLA, Chicago, Harvard e in molti altri stili

Scegli il tipo di fonte:

Consulta la lista di attuali articoli, libri, tesi, atti di convegni e altre fonti scientifiche attinenti al tema "Flora plant".

Accanto a ogni fonte nell'elenco di riferimenti c'è un pulsante "Aggiungi alla bibliografia". Premilo e genereremo automaticamente la citazione bibliografica dell'opera scelta nello stile citazionale di cui hai bisogno: APA, MLA, Harvard, Chicago, Vancouver ecc.

Puoi anche scaricare il testo completo della pubblicazione scientifica nel formato .pdf e leggere online l'abstract (il sommario) dell'opera se è presente nei metadati.

Articoli di riviste sul tema "Flora plant"

Garnock-Jones, P. J., e I. Breitwieser. "New Zealand floras and systematic botany: Progress and prospects". Australian Systematic Botany 11, n. 2 (1998): 175. http://dx.doi.org/10.1071/sb97008.

Testo completo

Abstract (sommario):

Botanists have produced vascular plant Floras of New Zealand at regular intervals since 1775. The current tracheophyte Flora series is nearing completion, but early volumes already need major revision. There are few Flora treatments covering algae and fungi. Moss and liverwort Floras are in early stages, while the Lichen Flora is now under revision. Current research attention is focused on revisions of critical groups, phylogenetic studies to investigate generic circumscriptions or family placements, and provision of new tools for plant identification. Plans are under way to produce an Excursion Flora.

Gli stili APA, Harvard, Vancouver, ISO e altri

Mapes, Gene, e Robert A. Gastaldo. "Late Paleozoic Non-Peat Accumulating Floras". Notes for a Short Course: Studies in Geology 15 (1986): 115–27. http://dx.doi.org/10.1017/s0271164800001366.

Testo completo

Abstract (sommario):

Upland floras (Chaloner, 1958), clastic substrate inhabitors (Dimichele et al., 1985), extrabasinal floras (Pfefferkorn, 1980), dryland floras (Havlena, 1960), seamforming Flöznahe and more distant Flözfremde (Daber, 1959; Havlena, 1961) mesophilous and xerophilous floras (Havlena, 1971), Callipteris-Walchia assemblage (Gothan and Gimm, 1930; Gothan and Remy, 1957), Megalopteris-Cordaites assemblage (Cross, 1977; Leary, 1981; Read and Mamay, 1964), Gigantopteris flora and Callipteris flora (Read and Mamay, 1964), early Permian floras (White, 1934), roof nodule floras (Stopes and Watson, 1907), the Mesophytic flora (Frederiksen, 1972), and “Permian” aspect (Elias, 1936a,b), are some of the terms that have been devised in recognition of the observation that many Late Paleozoic plant communities did not form coal swamp peats and their vegetational composition changed in response to global tectonism. The peat swamps clearly changed floral composition through time (Phillips, et al., 1974; Phillips, 1981; Dapples and Hopkins, 1969), but can be reasonably easily characterized, because “coal” swamp plants were commonly deposited in situ, or very near their sites of growth.

Gli stili APA, Harvard, Vancouver, ISO e altri

BYNG, JAMES W. "Review of East African Plant Collectors". Phytotaxa 234, n. 1 (11 novembre 2015): 100. http://dx.doi.org/10.11646/phytotaxa.234.1.10.

Testo completo

Abstract (sommario):

The Flora of Tropical East Africa, covering Uganda, Kenya and Tanzania, was one of the largest regional floras ever compiled, with over 12,000 wild plant species and taking 64 years to complete. The East African Plant Collectors is the perfect supplement to this great flora and is a wonderful compendium of botanists, collectors and authors showing the human element of the flora - the people behind the herbarium specimens, the new species and combinations and the flora treatments. This book includes around 2,700 collectors that have collected herbarium specimens in the region arranged alphabetically. Each individual entry includes biographical data, including nationality, dates of birth and death, travels, publications, eponymy, publications and it lists the herbaria where specimens were deposited. The level of detail varies considerably from collector to collector with some briefly treated, whilst others are very detailed. For example, Bernard Verdcourt’s entry is lengthy and includes location details of his 30 years of fieldwork, publication details of the flora treatments he compiled (a remarkable one-fifth of the flora...) and even an anecdote about meeting a lion on Ndi Hill!

Gli stili APA, Harvard, Vancouver, ISO e altri

Inelova, Z. A., M. U. Aitzhan, Y. G. Zaparina e G. K. Erubayeva. "PLANT BIODIVERSITY OF MONITORING POINTS V.AMANGELDY ALMATY REGION". Series of biological and medical 2, n. 338 (15 aprile 2020): 48–55. http://dx.doi.org/10.32014/10.32014/2020.2519-1629.12.

Testo completo

Abstract (sommario):

The article provides a systematic analysis of the species composition of plants of the flora of v. Amangeldy, Almaty region. The comprehensive study of regional floras is becoming increasingly important in connection with the implementation of the solution to the problem of studying and preserving biological diversity. Complete information about the composition of the flora of a territory is of great theoretical importance, it allows establishing the structure and Genesis of its components, to identify individual characteristics, to restore the history of formation and trends. This ultimately is the basis of rational use of plant resources and protection of rare and endangered plants, as well as to solve many important economic problems - identifying new sources and resources of medicinal, food, fodder, ornamental and other plants. One of the main characteristics of any flora is its systematic structure, namely the ratio of families, genera and species, on the one hand, and the quantitative indicators of these taxa that determine its wealth, on the other. These indicators are components of a systematic analysis of flora in general and coenoflora in particular, the data obtained using such analysis are important material for comparative floristry. From this point of view, the systematic structure of the flora acquires the significance of one of the essential indicators that characterize the flora in the regional plan. The study of the species composition of the flora is of great importance both for understanding the history of flora and landscapes of the region as a whole, and for finding ways to conserve and use biodiversity under conditions of increasing anthropogenic pressure. Research was carried out by route-reconnaissance method in combination with a detailed study of experimental sites. In the study area – V. Amangeldy was first identified: 112 species from 88 genera and 29 families, with the dominance of the families Asteraceae (24 species or 21.4 %, 17 genera), Rosaceae (15 species or 13.39%, 11 genera), Brassicaceae (11 species, or 9.82 %, 9 genera) from Dicotyledons, and Poaceae (11 genera, 12 species, or 10.71 %) from Monocotyledonous plants. The dominant families account for 62 species, which is 55.36 % of the total number of plant species growing in this territory. Leading genera Artemisia, Potentilla and Rumex. On the territory of the study, 33 forage plant species were identified: Bromus inermis (Leyss.) Holub., Rumex confertus Willd., Trifolium pratense L., Poa bulbosa L., etc. In connection with the degradation of the vegetation cover number of weed plants was 75 species, among which are: Rumex crispus L., Capsella bursa-pastoris (L.) Medik., Cannabis ruderalis Janisch., Lathyrus tuberosus L. and other. Endemic and rare species were not found. The results of the research will serve as a basis for the rational use of the flora of Amangeldy village in Almaty region, as well as for the conservation of biodiversity. Obtained as a result of a systematic analysis of the flora of Amangeldy, it will help to identify the centers of endemism and relict, as well as to solve the issues of the place and role of this flora in a number of other adjacent floras.

Gli stili APA, Harvard, Vancouver, ISO e altri

Pigg, Kathleen B., e Melanie L. DeVore. "A review of the plants of the Princeton chert (Eocene, British Columbia, Canada)". Botany 94, n. 9 (settembre 2016): 661–81. http://dx.doi.org/10.1139/cjb-2016-0079.

Testo completo

Abstract (sommario):

The Princeton chert is one of the most completely studied permineralized floras of the Paleogene. Remains of over 30 plant taxa have been described in detail, along with a diverse assemblage of fungi that document a variety of ecological interactions with plants. As a flora of the Okanagan Highlands, the Princeton chert plants are an assemblage of higher elevation taxa of the latest early to earliest middle Eocene, with some components similar to those in the related compression floras. However, like the well-known floras of Clarno, Appian Way, the London Clay, and Messel, the Princeton chert provides an additional dimension of internal structure. In the present study, we outline the history of Princeton chert plant research, starting with Boneham and others, and extending into studies by Stockey and her students and colleagues. These studies were undertaken primarily at the University of Alberta, Edmonton. We then re-examine the individual elements of the Princeton chert flora, using the framework of the currently recognized Angiosperm Phylogeny Group (APG III) phylogeny and in light of recent fossil discoveries. We hope that this update will bring to mind new aspects of the significance of the Princeton chert flora to Paleogene paleobiology, biogeography, and plant evolution.

Gli stili APA, Harvard, Vancouver, ISO e altri

Miller, Chuck, e William Ulate. "Descriptive Data Challenges for the World Flora Online". Biodiversity Information Science and Standards 2 (17 maggio 2018): e26731. http://dx.doi.org/10.3897/biss.2.26731.

Testo completo

Abstract (sommario):

The World Flora Online (WFO) is primarily a data management project initiated in 2012 in response to Target 1 of the Global Strategy for Plant Conservation – "To create an online flora of all known plants by 2020". A WFO Consortium has been formed of now 42 international partners with a governing Council and three Working Groups. The World Flora Online Public Portal (www.worldfloraonline.org) was launched at the International Botanical Congress in Shenzhen, China in July, 2017. The baseline Public Portal was primarily populated with a taxonomic backbone of information gathered from The Plant List augmented by newer taxonomic sources like Solanaceae Source. To support all known plant names in the WFO. including both vascular and non-vascular plants, new WFO identifiers (WFOIDs) were created, which were also cross-referenced to the International Plant Names Index (IPNI) identifiers for plant names included there. The next phase of the World Flora Online involves additional enhancement of the taxonomic backbone by engagement of new plant Taxonomic Expert Networks (TENs) and acceleration of ingestion of descriptive data from digital floras and monographs, and other sources like International Union for Conservation of Nature (IUCN) threat assessments and the Botanic Gardens Conservation International (BGCI) Global Tree Assessment. Descriptive data can be text descriptions, images, geographic distributions, identification keys, phylogenetic trees, as well as atomized trait data like threat status, lifeform or habitat. Initial digital descriptive datasets have been received by WFO from Flora of Brazil, Flora of South Africa, Flora of China, Flora of North Africa, Solanaceae Source and several others. The hard work is underway to match the names associated with the submitted descriptions to the names and WFOIDs in the World Flora Online taxonomic backbone and then merging the descriptive data elements into the WFO database. Numerous data tools have been adopted and created to accomplish the data cleaning, standardization and transformation required before descriptive data can be integrated. The WFO project has discovered many variations between just the few datasets received so far, which highlights the need for better standardization and controlled vocabularies for flora and monographic descriptive data. This presentation will review some of the issues identified by the project when merging descriptive data and some potential gaps in the TDWG standards specifically for flora descriptive data. Some opportunities for consideration by the TDWG Species Information Interest Group will be presented.

Gli stili APA, Harvard, Vancouver, ISO e altri

Rex, Gillian M., e Andrew C. Scott. "The sedimentology, palaeoecology and preservation of the Lower Carboniferous plant deposits at Pettycur, Fife, Scotland". Geological Magazine 124, n. 1 (gennaio 1987): 43–66. http://dx.doi.org/10.1017/s0016756800015776.

Testo completo

Abstract (sommario):

AbstractThe Lower Carboniferous (Asbian) sediments and volcanics of the Pettycur region in Fife, Scotland, yield several important anatomically preserved floras including that from the famous ‘Pettycur Limestone’. The plant fossils are preserved as calcareous permineralizations and fusain within limestone blocks which occur at the base of basaltic lava flows or within pyroclastic sequences. The geology and sedimentology of these plant deposits have been investigated, and it is demonstrated that a number of plant-bearing facies can be recognized which reflect different modes of transport, deposition and fossilization. Of these facies the ‘Pettycur Limestone’ is the most well known. The lithology is composed of a distinct assemblage dominated by lycopods and the pteridosperm, Heterangium. Other assemblages include a limestone dominated by zygopterid ferns which are frequently fusainized and the Kingswood Limestone which contains a completely different flora to that at Pettycur, being dominated by pteridosperms, other gymnosperms and the lycopod Oxroadia. Each sediment type is characterized by a distinct mineralization history of the plants reflecting different sites of fossilization.A hypothesis concerning the original ecology of the plant assemblages within the basaltic volcanic terrain is proposed. It is suggested that the Pettycur Limestone represents an established original peat within which the plants were permineralized. The zygopterid ferns occupied sites which were susceptible to wildfire and did not establish long-lived peat-forming communities. The Kingswood flora was established in a region where plants were prone to fire and then subsequently transported into an area of limestone deposition along with unburnt plant fragments. This flora was separated by space and/or time from the Pettycur floras. Lakes developed on lava surfaces and provided sites of fossilization for plant fragments as compressions.

Gli stili APA, Harvard, Vancouver, ISO e altri

JIJINA, ANTHONY P., ELLEN D. CURRANO e KURT CONSTENIUS. "THE PALEOBOTANY AND PALEOECOLOGY OF THE EOCENE HERREN BEDS OF NORTH-CENTRAL OREGON, USA". PALAIOS 34, n. 9 (20 settembre 2019): 424–36. http://dx.doi.org/10.2110/palo.2019.014.

Testo completo

Abstract (sommario):

ABSTRACT New collections of plant macrofossils and radiometric dates from the Herren beds of north-central Oregon provide the opportunity to document floral communities and calculate foliar-derived climate estimates from the warm early Eocene and the cooler middle Eocene. Plant macrofossils were collected from one fluvial site at East Birch Creek approximately 2 m below a 51.9 ± 0.9 Ma tuff. Collections were also made at two co-occurring fluvial sites at Arbuckle Mountain, whose ages are constrained to ca. 44.5–43.8 Ma based on a dated tuff from Willow Creek (44.5 ± 0.8 Ma) and reported ages for the overlying Clarno Formation. Floral findings show an almost complete vegetation overturn, with only two genera (Glyptostrobus and Allantodiopsis) appearing in both floras. Both floras are species poor, but the older East Birch Creek flora has higher richness and evenness than the younger Arbuckle Mountain flora. The four named genera at East Birch Creek are taxa found throughout Eocene North America; named genera at Arbuckle Mountain also include taxa restricted to the Pacific Northwest. Leaf margin analysis and leaf area analysis of the East Birch Creek community suggest a warmer and possibly wetter (mean annual temperature 23.4 ± 4.3 °C; mean annual precipitation 206 +89, -63 cm) climate than the Arbuckle Mountain flora (16.4 ± 4.2 °C; 165 +50, -71.4 cm). This research provides a framework for future research on Eocene floristic, environmental, and climatic trends of the Pacific Northwest.

Gli stili APA, Harvard, Vancouver, ISO e altri

Pacyna, Grzegorz. "Plant remains from the Polish Triassic. Present knowledge and future prospects". Acta Palaeobotanica 54, n. 1 (1 giugno 2014): 3–33. http://dx.doi.org/10.2478/acpa-2014-0001.

Testo completo

Abstract (sommario):

ABSTRACT The Triassic plant macrofossils of Poland are very poorly known. There are few Triassic rock exposures here, they contain very few plant specimens, there is little scientific interest in the subject, and the rare plant remains found in drill cores are of low stratigraphical significance. The Lower Triassic macroflora is surprisingly poorer taxonomically than coeval European floras, and only single specimens have been found. The flora of the Middle Triassic is even poorer as a result of the Muschelkalk sea transgression. Only the Upper Triassic floras contain many specimens and taxa. The Upper Triassic macrofloras from Polish territory are well known since the early 19th century. Pioneering descriptions of these floras were given by Goeppert and Raciborski. From the Polish Triassic, the seed fern Lepidopteris ottonis (index species for the Rhaetian stage) and Neocalamites lehmannianus (sphenopsid species typical of almost all European Upper Triassic and Lower Jurassic floras) were described for the first time ever. In the 20th century only single specimens were described from outcrops and drill cores. Barbacka revised Lepidopteris ottonis specimens from old collections and described some new material. Palynological research on Triassic strata in Poland intensified from the 1970s on. That work has produced spore-pollen and megaspore zonations for Triassic strata in Poland, but the correlation of the dispersed spores and pollen grains with their parent plants is low. The Polish Triassic flora is comprised of ferns, lycopsids, sphenopsids, cycads, bennettitaleans, ginkgoaleans and conifers. This flora is taxonomically poorer than equally old and geographically close European floras. All available data about Polish Triassic plants fossils are critically summarised in this paper for the first time. The biostratigraphical and lithostratigraphical correlations of Polish Triassic floras with other European Triassic floras are outlined. New macrofloral assemblages for the Lower and Middle Triassic and macrofloral assemblage zones for the Upper Triassic are proposed for Poland. Recent new finds of taxonomically rich, abundant and well-preserved floras accompanying vertebrate remains in Silesia provide an opportunity for comprehensive research on Polish Triassic floras. This should improve our perception of their taxonomy and allow them to be described in evolutionary and palaeoecological contexts

Gli stili APA, Harvard, Vancouver, ISO e altri

Jackson, Peter Wyse, e James S. Miller. "Developing a World Flora Online - a 2020 challenge to the world's botanists from the international community". Rodriguésia 66, n. 4 (2015): 939–46. http://dx.doi.org/10.1590/2175-7860201566402.

Testo completo

Abstract (sommario):

Abstract The Global Strategy for Plant Conservation of the Convention on Biological Diversity adopted as its first target in 2010 the preparation of "An online flora of all known plants" by 2020. This target was subsequently adopted by a broadly-based international consortium of botanical institutions that have committed themselves to undertaking this ambitious project. The preparation of a world flora will be the first modern and large-scale and comprehensive attempt to produce a comprehensive overview and baseline of knowledge on the world's plant diversity. This article outlines previous historic efforts to document the world's known flora. It also describes the ways in which the World Flora Online Consortium was created, how it is organized and its plans to compile diverse datasets available in digital formats into a single online portal available and open to all. Such data are being combined from geographical floristic accounts, such as the Flora of China, the Flora of North America and many other regional and national projects, together with relevant monographic treatments.

Gli stili APA, Harvard, Vancouver, ISO e altri

Più fonti

Tesi sul tema "Flora plant"

Stonehouse, Amanda L. "The flora and plant communities of Botany Glen". Virtual Press, 2003. http://liblink.bsu.edu/uhtbin/catkey/1266033.

Testo completo

Abstract (sommario):

Botany Glen, The James S. Wilson Memorial Sanctuary, is an 18 hectare (45 acre) forested tract located in Grant County, Indiana, adjacent to the Mississinewa River. Botany Glen is an important natural area in east central Indiana due to its relatively small size and high diversity.The flora documents 331 species and varieties of vascular plants representing 241 genera and 90 families; 158 species are recorded for the first time in Grant County. Of the 331 species listed, 67 (or 20%) are exotic. Most of these exotics have failed to penetrate the interior of the forest.Permanent monitoring plots were established in dry upland forest, floodplain forest and secondary successional forest. Data were collected from overstory, understory and herbaceous plant layers in these plots. Analysis of these data and information from the floristic inventory were utilized to describe the structure and composition of three primary plant communities. Baseline data and procedures were established for future study of this property.
Department of Biology

Gli stili APA, Harvard, Vancouver, ISO e altri

Wasley, Jane. "The effect of climate change on Antarctic terrestrial flora". School of Biological Sciences - Faculty of Science, 2004. http://ro.uow.edu.au/theses/275.

Testo completo

Abstract (sommario):

Climate change is expected to affect the high latitudes first and most severely, rendering Antarctica one of the most significant baseline environments for the study of global climate change. The indirect effects of climate warming, including changes to the availability of key environmental resources, such as water and nutrients, are likely to have a greater impact upon Antarctic terrestrial ecosystems than the effects of fluctuations in temperature alone. Water availability is the focus in this thesis for two main reasons; firstly, there is a wealth of evidence to suggest water is currently limiting to Antarctic plant distributions and productivity, and secondly, availability of this key resource is predicted to change with the onset of climate change. Nutrient availability is a second variable considered in this work, as there is evidence to suggest that nutrients also play a role in determining plant species distributions, and changes to nutrient balance and turnover rates are also expected in response to climate change. This work was conducted in the floristically important Windmill Islands region of East Antarctica, with the three Windmill Islands moss species Bryum pseudotriquetrum, Ceratodon purpureus and Grimmia antarctici forming its focus. A combination of field ecology, ecophysiology and laboratory studies were used to determine fine-scale patterns of present species distributions and their relationship to naturally occurring water and nutrient resource gradients, the impact of increased water and nutrients on a range of cryptogamic communities, and tolerance of desiccation biological profiles. A survey-based approach was used to determine species level patterns in bryophyte species distributions, and identify correlations with resource availability. Ten replicate transects, along community gradients, from pure bryophyte stands, through transitional moribund bryophyte zones, to lichen-dominated communities, were surveyed at two sites. The physical environment at each site was characterised by measurement of site soil properties, along with individual transect aspects and slopes. To determine the relationship between resource gradients and community patterns water and nutrient availability, along with a range of plant biochemistry measures indicative of the growth environment, were measured using a series of quadrats along each transect. Percent abundance for each species and/or vegetation category was determined for each quadrat by microscopic examination of field samples. The community gradient, covering the entire ecological range of past and present bryophyte occupation, was found to be accompanied by resource gradients that operated in opposing directions. Pure bryophyte communities existed under conditions of high water availability and low nutrient availability. Crustose lichen-dominated communities persisted under opposing environmental conditions, of low water availability and high nutrient availability. Grimmia antarctici dominated the wettest habitats but its distribution extended into the dry moribund zones, albeit in low levels of abundance. Bryum pseudotriquetrum occurred in consistent levels of abundance across the entire gradient, whilst C. purpureus was restricted to the driest habitats. Live bryophyte material was found to occur in moribund turf, supporting the potential for bryophyte regeneration under a future wetter climate. Regenerating turf showed potential to support high species diversity, as all four bryophytes survive in this zone. To investigate the likely impacts of a wetter climate on Antarctic terrestrial communities, four cryptogamic communities, pure bryophyte, moribund bryophyte, crustose and fructicose lichen-dominated communities were subject to a multi-season manipulative field experiment. Within each community type, eight replicate quadrats received increased water and/or nutrient availability over two consecutive summer seasons. A range of physiological and biochemical measurements were conducted in order to quantify the community response to the treatments and determine the extent of any nutrient and water limitation. Few multi-season manipulative field experiments have been conducted in continental Antarctica. Whilst an overall increase in productivity in response to water and nutrient additions was supported, productivity appeared to respond more strongly to nutrient additions than to water additions. Pure bryophyte and fructicose lichen communities also showed stronger positive responses to additions, identifying some communities that may be better able to adapt and prosper under the ameliorating conditions associated with a warmer, wetter future climate. Using a range of morphological, biochemical and physiological techniques, biological profiles related to desiccation tolerance were developed for the three bryophyte study species, providing measures of relative abilities to avoid, tolerate, recover from and survive desiccation. Ceratodon purpureus showed good desiccation avoidance characteristics, its photosynthetic efficiency remained high at low water contents and it was lipid rich, suggesting that this species is well adapted to survive a drying climate. Bryum pseudotriquetrum is also likely to survive drier conditions, as this species showed good desiccation avoidance, had a plastic response to desiccation, and contained stachyose, which is likely to assist in its survival of desiccation events. Conversely, G. antarctici showed poor desiccation avoidance, as photosynthetic efficiency required highest water contents and it contained few protective substances, this species is therefore least likely to survive a drying environment. This study provides a baseline from which future changes to the Windmill Islands cryptogamic communities can be monitored. A baseline incorporating fine-scale bryophyte species patterns is particularly useful, as this component of the cryptogamic community is likely to be highly sensitive to even small shifts in water availability and detection of change is likely to be more sensitive at fine- rather than broad-scales. Both water and nutrient resource availability was found to underlie regional bryophyte species distributional patterns. The dynamics of the Windmill Islands flora is therefore likely to shift in response to climate change as the availability of these key resources is altered. Under a wetter future climate, productivity is overall likely to increase but only certain cryptogamic communities are likely to thrive. Regeneration of moribund bryophytes appears likely only if the future moisture regime creates consistently moist conditions. Bryum pseudotriquetrum is most likely to survive both a drying climate and also a fluctuating climate, which is a highly likely scenario for the region. Under a drier climate, the Antarctic endemic, G. antarctici, is likely to be most adversely affected, as it dominates only the wettest communities and generally shows poor tolerance of desiccation. Conservation issues are therefore raised for this species, if the current drying trend continues, creating overall biodiversity concerns.

Gli stili APA, Harvard, Vancouver, ISO e altri

Manton, Erin Rebecca. "DNA barcoding the vascular plant flora of southern British Columbia". Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/60195.

Testo completo

Abstract (sommario):

DNA barcoding is a tool for rapidly identifying species based on short, standardized sequences of DNA, for example in situations where this may be difficult using morphology alone. I assembled a core DNA barcode reference library for southern British Columbia, home to ~54% of the vascular plant species in Canada, using the core plastid barcode loci rbcL and matK, and assessed its utility for identifying species in this region. The library comprises 4,812 sequences obtained from field-collected and herbarium tissue samples, supplemented with sequences downloaded from BOLD and GenBank, with at least one sequence for 75.4% of the vascular plant species occurring below 50°N in British Columbia. Sequence recoverability was significantly higher for rbcL than for matK (93.5% and 80.2%, respectively), and only marginally lower for both markers when using herbarium specimens (90.5% for rbcL and 77.8% for matK), which demonstrates the future feasibility of using museum specimens for completing a southern BC barcode reference library. As a proxy for assessing marker effectiveness, I scored resolution at the level of species and genus using tests of monophyly for Neighbour Joining trees, and performed sequence similarity searches with BLASTn analyses, both for each locus separately and for a dual-locus marker system (rbcL+matK; scored as a cumulative percentage in the BLAST analyses). Ignoring species represented by singleton sequences, the highest overall level of discrimination (66.9% of species and 91.6% of genera) was achieved for BLASTn analysis of rbcL+matK together. This work represents a significant contribution to a nation-wide barcode database, and provides a preliminary platform for ecological and other applications requiring species identification, where traditional methods are not feasible.
Science, Faculty of
Botany, Department of
Graduate

Gli stili APA, Harvard, Vancouver, ISO e altri

Sokmen, Atalay. "Novel bioactive leads from the Turkish flora via plant cell cultures". Thesis, University of Sheffield, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265592.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Hang, Ye. "Developing multi-layered, flowering Mediterranean plant communities using South African flora". Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/12433/.

Testo completo

Abstract (sommario):

The aim of this study was to create sown multi-layered communities of Mediterranean South African plants based on Fynbos and Renosterveld species. These communities were designed to test naturalistic design principles as to achieve long flowering designed plantings involving three canopy heights (tall, medium and low). Competition between shrubs/forbs/succulents and geophytes by using microcosm experiments mirrors the form of actual designed vegetation in practice. The experiments prior to the competition experiment provided the understanding of germination, winter cold and summer wetness tolerance of a large number of SA species (over 300 species) from Western Cape. All winter growing and summer dormant geophyte species had the capacity to emerge from autumn sowings, and some were able to do the same from spring sowing. Smoke treatment prior to sowing is effective on many forb and small shrub species from Fynbos and Renosterveld, but much less useful (or necessary) on geophyte species. Species such as Gladiolus carneus, Gladiolus tristis and Ixia curvata tolerated -8°C in winter 2010/11, and many more species survived -5°C in winter 2011/12. Bulbinella elata, Bulbinella elegans, Bulbinella nutans, Moraea tripetala, Kniphofia uvaria, Romulea atrandra and Romulea sabulosa suffered no loss at -5°C and no loss over summer 2012 (historically the wettest summer in the UK since 1910). Altitude and the resulting number frost days which individuals experience at the collection locations were critical factors influencing their winter mortality in Northern England. Habitat soil conditions and other environment factors are important in relation to their summer mortality. Species naturally occuring in Renosterveld and seasonally wet habitats are typically more wet tolerant response in Uk summers (i.e. many Bulbinella, Kniphofia, Gazania and Romulea species). Specific geographical provenances were explored to find more useful genotypes that can survive well in the UK. Species collected from the inland Roggeveld region, including the provenances Sutherland, Rooiwal, Groot Swartberg mountains, and the Komsberg, were the most successful species in response to winter cold in Sheffield. Fifteen plant community types were designed to access competition amongst 30 selected species in terms of mortality and biomass production within the studies main microcosm experiment. The most successful communities were generally those composed of tall canopy layer geophytes and forbs/shrubs. Geophytes suffered less mortality than shrub/forb/succulent species but contributed less biomass in the first two years, particularly in low height geophytes. Medium height geophytes formed a more extensive canopy and had higher competition capacity to increase their coverage and biomass in communities from the third year on. Species that did this included Watsonia ‘Tresco Dwarf Pink’, Gladiolus cardinalis and Watsonia schlechteri. Some small Fynbos and Renosterveld geophytes tested in the combinations demonstrated a degree of shade tolerance, as in Romulea komsbergensis, Ixia and Hesperantha species. These communities were managed by annual cutting in late summer-early autumn.

Gli stili APA, Harvard, Vancouver, ISO e altri

Harris, C. J. "Plant community change in the Montgomeryshire Canal in relation to succession theory". Thesis, University of Liverpool, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384373.

Testo completo

Abstract (sommario):

The water physico-chemistry, hydrology and plant communities in the Montgomeryshire Canal were examined for evidence of successional phenomena over a five year period and comparisons were made with previous studies. Plant communities changed in a manner which suggested that classical successional ideas were applicable to canals. The changes were readily distinguishable when a period of twenty years had passed but as the examined period was decreased the complexity of the sequence became more apparent. In a single year there were changes in the plant communities. A later stage of succession was indicated as the number of changes increased and the available energy and habitat niches were filled. Succession did not take place in a slow orderly manner but progressed as a series of jumps when the plants were released from inhibitory factors. These sudden changes were promoted by changes in the habitat due to climatic variation, removal of grazers or alterations in the water level. Where the most important inhibitory factors were unchanging, the succession proceeded to a climax community decided by those factors. The physico-chemical factors affecting the canal changed during the study period. The canal became more acidic due to the effects of a cold wet spring. The underwater light climate in un-navigated lengths was determined more by the amount of shade upon the water surface than by any other factor. Levels of suspended solids were relatively unimportant. Established plant communities showed a great resistance to change, despite being subjected to traumatic perturbations. Skim dredging of a site with a well established community structure did not change the course of the succession, but removed inhibiting factors such as anoxic material or grazing and promoted a more rapid change to reedswamp. In the .long term falling water levels had the same effect as raising of the bottom due to infill, but in the two routes towards a less aquatic system were different. Infill led to a moving band of depth sensitive plants whilst loss of water encouraged rapid creation of a reedswamp. The study confirmed that limited navigation is not detrimental to the species composition or the productivity. Eutrophication was a limiting factor creating an unique climax community.

Gli stili APA, Harvard, Vancouver, ISO e altri

Kloot, P. M. "Studies in the alien flora of the cereal rotation areas of South Australia /". Title page, contents and summary only, 1985. http://web4.library.adelaide.edu.au/theses/09PH/09phk655.pdf.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Solé-Senan, Xavier Oriol. "Plant diversity and ecosystem services in agricultural landscapes along different spatial scales". Doctoral thesis, Universitat de Lleida, 2017. http://hdl.handle.net/10803/406287.

Testo completo

Abstract (sommario):

Aquesta tesi té com a objectiu escatir fins quin punt les diversitats d'espècies i funcional de les comunitats de flora arvense canvien a escala de camp i de paisatge. A escala de camp, l'estudi s'ha focalitzat en l'anàlisi de l'efecte de la intensificació agrícola, depenent de la posició dins del camp i en funció del nivell de pertorbació en cada hàbitat que forma part del tradicional paisatge en mosaic en els ambients mediterranis. A escala de paisatge, hem analitzat els canvis en la diversitat al llarg de gradients d'heterogeneïtat en el paisatge, tenint en compte d'una banda l'heterogeneïtat composicional i per l'altra l'heterogeneïtat configuracional. L'aproximació basada en atributs biològics ens ha permès dirigir l'estudi a analitzar de quina manera afecten els canvis a la composició florística d'aquestes comunitats a la provisió dels serveis ecosistèmics que els agroecosistemes aporten a altres organismes.
La presente tesis tiene como objetivo dilucidar hasta qué punto la riqueza en especies y la diversidad funcional de las comunidades de flora arvense cambian a escala de campo y de paisaje. A escala de campo, el estudio se ha enfocado en el análisis del efecto de la intensificación agrícola, en cuanto a la posición en el campo y al nivel de perturbación en cada hábitat en la diversidad y funcionalidad de las comunidades de flora arvense. A escala de paisaje, hemos analizado los cambios en la diversidad a lo largo de gradientes de heterogeneidad en el paisaje, teniendo en cuenta por un lado la heterogeneidad composicional y por el otro la heterogeneidad configuracional. La aproximación basada en atributos biológicos nos ha permitido enfocar el estudio en cómo afectan los cambios en la composición florística de dichas comunidades a la provisión de los servicios ecosistémicos que los agroecosistemas aportan a otros organismos.
This thesis is aimed at disentangling the extent at which species richness and functional diversity of plant species from arable communities change at field and landscape scale. At field scale, the study was focused on the effects of agricultural intensification regarding field position and the level of disturbance at which such habitat is subjected on the diversity and functionality of arable plants community. At landscape scale, we assessed the diversity changes along gradients of landscape heterogeneity, taking into account on the one hand the surrounding compositional landscape heterogeneity and on the other hand the configurational landscape heterogeneity. The trait-based approach conducted allows us to focus on how shifts in species composition in such arable plant communities are expected to affect the delivery of the ecosystem services that these agroecosystems provide to other organisms.

Gli stili APA, Harvard, Vancouver, ISO e altri

Rowe, N. P. "The fossil flora of the Drybrook Sandstone (Lower Carboniferous) from the Forest of Dean, Gloucestershire". Thesis, University of Bristol, 1986. http://hdl.handle.net/1983/5ff3b8d0-8848-4f44-a5ea-bec0bf4a9daa.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Vanderplank, Sula E. "The Vascular Flora of Greater San Quintín, Baja California, Mexico". Scholarship @ Claremont, 2010. http://scholarship.claremont.edu/cgu_etd/2.

Testo completo

Abstract (sommario):

The plants of San Quintín (Baja California, Mexico) were documented through intensive fieldwork and the collection of herbarium specimens to create a checklist of species. This region is home to a diverse flora with high levels of local endemism and many rare plants. The flora documented in this study was compared to historical records from the region and shows the impact of agriculture and urbanization on the plants, including several extirpated species. A study of the perennial vegetation using a 1 km grid provides species distribution data for 140 native species, which were assessed to highlight areas of significant species richness for native, rare, and endemic taxa. Several non-native plants were also mapped to provide baseline data. Areas of conservation priority for the flora of Greater San Quintín are discussed in light of these combined findings.

Gli stili APA, Harvard, Vancouver, ISO e altri

Più fonti

Libri sul tema "Flora plant"

Milleken, William. Flora Celtica. Edinburgh: Birlinn, 2004.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Dirzo, Rodolfo. Diversidad de flora mexicana. 2^a ed. [Mexico]: CEMEX, 1996.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Museum, Berkshire, a cura di. Flora of Berkshire County, Massachusetts. [Pittsfield, Mass.]: Berkshire Museum, 1996.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Grapow, Laura Celesti. Flora alloctona e invasiva d'Italia. Roma: Casa editrice Università La Sapienza, 2010.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Naumenko, N. I. Flora i rastitelʹnostʹ I︠U︡zhnogo Zauralʹi︠a︡. Kurgan: Kurganskiĭ gos. universitet, 2008.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Breedlove, Dennis Eugene. Flora de Chiapas. México: Instituto de Biología, UNAM, 1986.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Keddy, Cathy. Atlantic coastal plain flora conservation in Ontario. Ottawa, Ont: C.J. Keddy, 1989.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Martins, Ana Cecilia, Lorelai Brilhante Kury e Magali Romero Sá. Flora brasileira: História, arte & ciência. Rio de Janeiro: Casa da Palavra, 2009.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Alcaraz, Juan Antonio Devesa. Vegetación y flora de Extremadura. Badajoz, España: Universitas Editorial, 1995.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

E, Giancristofaro, a cura di. Flora Popolare d'Abruzzo. Lanciano, Italia: Casa Editrice Rocco Carabba, 2001.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Più fonti

Capitoli di libri sul tema "Flora plant"

da Silva, Luiz Everson, Camila Confortin, Michele Debiasi Alberton, Diogo Alexandre Siebert e Camila Jeriane Paganelli. "Enzyme Inhibitory Potentials from Brazilian Flora". In Plant-derived Bioactives, 383–93. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-1761-7_15.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Kato, Masahiro. "The fern flora of Seram". In The Plant Diversity of Malesia, 225–34. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-2107-8_19.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Pignatti, Erika, e Sandro Pignatti. "The Flora of the Dolomites". In Plant Life of the Dolomites, 13–20. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-53051-1_3.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Moreira-Muñoz, Andrés. "Geographical Relations of the Chilean Flora". In Plant Geography of Chile, 87–128. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-8748-5_3.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Geesink, Rob. "The general progress of Flora Malesiana". In The Plant Diversity of Malesia, 11–16. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-2107-8_2.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Pignatti, Erika, e Sandro Pignatti. "Remarks on the Flora of the Dolomites". In Plant Life of the Dolomites, 21–52. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-53051-1_4.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Pyšek, Petr, Milan Chytrý, Jan Pergl, Jiří Sádlo e Jan Wild. "Plant Invasions in the Czech Republic". In Flora and Vegetation of the Czech Republic, 339–99. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-63181-3_8.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Brunelli, Davide, Pietro Tosato e Maurizio Rossi. "Flora Monitoring with a Plant-Microbial Fuel Cell". In Lecture Notes in Electrical Engineering, 41–48. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-55071-8_6.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Pignatti, Erika, e Sandro Pignatti. "Exploration of the Flora and Ecological Factors in the Dolomites". In Plant Life of the Dolomites, 3–5. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-48032-8_1.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Beaman, John H., e Reed S. Beaman. "Diversity and distribution patterns in the flora of Mount Kinabalu". In The Plant Diversity of Malesia, 147–60. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-2107-8_14.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Atti di convegni sul tema "Flora plant"

Shi, Jing, e Lin Huang. "Development of Flora-Oriented Plant Ontology". In 2009 Second International Symposium on Knowledge Acquisition and Modeling. IEEE, 2009. http://dx.doi.org/10.1109/kam.2009.122.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Hamann, Heiko, Mostafa Wahby, Thomas Schmickl, Payam Zahadat, Daniel Hofstadler, Kasper Stoy, Sebastian Risi et al. "Flora Robotica - Mixed Societies of Symbiotic Robot-Plant Bio-Hybrids". In 2015 IEEE Symposium Series on Computational Intelligence (SSCI). IEEE, 2015. http://dx.doi.org/10.1109/ssci.2015.158.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Ebel, A. L., S. A. Sheremetova, I. A. Khrustaleva, T. O. Strelnikova, S. I. Mikhailova e T. V. Ebel. "To the study of alien species in the flora of Khakassia". In Problems of studying the vegetation cover of Siberia. TSU Press, 2020. http://dx.doi.org/10.17223/978-5-94621-927-3-2020-49.

Testo completo

Abstract (sommario):

As a result of the field studies, analysis of publications and herbarium materials, it has been established that by now the alien flora of the Republic of Khakassia includes about 140 species of vascular plants. Of this number, more than 30 species are invasive plants included in the “Black Book of Flora of Siberia” (2016). In recent years, there has been both a fairly rapid replenishment of the flora with alien plants and a noticeable dispersal of a number of invasive species across the territory of Khakassia. For the purpose of monitoring alien plant species, we use the capabilities of the international scientific network iNaturalist.org.

Gli stili APA, Harvard, Vancouver, ISO e altri

Mitrofanova, I. V., V. A. Brailko, N. P. Lesnikova-Sedoshenko, N. N. Ivanova e O. V. Mitrofanova. "The effect of pH on the functional state of photosynthetic apparatus of rare endemic plants of the Crimean flora in vitro". In IX Congress of society physiologists of plants of Russia "Plant physiology is the basis for creating plants of the future". Kazan University Press, 2019. http://dx.doi.org/10.26907/978-5-00130-204-9-2019-291.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Krylenko, Sergey, e Sergey Krylenko. "CHARACTERISTICS OF THE CLIFF PLANT COMMUNITIES OF THE TUAPKHAT MASSIF". In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.21610/conferencearticle_58b4316e19929.

Testo completo

Abstract (sommario):

Preservation of biological diversity is necessary for sustainable development and rational use of coastal resources. In this paper structure of the cliff plant communities of the massif Tuapkhat (the Black Sea coast, Russia) are characterized. Flora of this coastal zone combines features of Mediterranean and middle European Russia types. Herbaceous and shrub life-forms and xeromorphous and petrophilous plant associations dominate at the studied area. The main factor determining the species composition of the examined communities is substrate character.

Gli stili APA, Harvard, Vancouver, ISO e altri

Testo completo

Abstract (sommario):

Gli stili APA, Harvard, Vancouver, ISO e altri

Nikolin, Е. G., e I. A. Yakshina. "Findings of new vascular plant species in Tiksi settlement (Arctic Yakutia)". In Problems of studying the vegetation cover of Siberia. TSU Press, 2020. http://dx.doi.org/10.17223/978-5-94621-927-3-2020-27.

Testo completo

Abstract (sommario):

The article provides information about the distribution of 18 new vascular plant species in the vicinity of Tiksi settlement. Most of them are imported on the territory of a collective farm. The distribution of 7 species known earlier, but not included in the modern list, has been confirmed. Some taxonomic clarifications and clarifications of the distribution of individual species are made. According to the results of literature data and new findings, there are 326 species in this concrete flora.

Gli stili APA, Harvard, Vancouver, ISO e altri

Maccracken, S. Augusta, Ian M. Miller, Ian M. Miller, Charles W. Mitter, Charles W. Mitter, Conrad C. Labandeira e Conrad C. Labandeira. "PRELIMINARY ASSESSMENT OF PLANT–INSECT ASSOCIATIONS IN THE KAIPAROWITS FLORA, LATE CRETACEOUS OF UTAH". In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-286937.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Stepanov, N. S., O. A. Timofeeva, U. A. Ogorodnova e D. I. Mukhamadeeva. "Comparative analysis of the biochemical composition and structurally functional features of meadow clover (Trifolium pretense L.) flora of the regions of the Republic of Tatarstan". In IX Congress of society physiologists of plants of Russia "Plant physiology is the basis for creating plants of the future". Kazan University Press, 2019. http://dx.doi.org/10.26907/978-5-00130-204-9-2019-411.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Polychronopoulos, P., FA Lyssaios, R. Michalea e N. Aligiannis. "Studies on the antivenom activity of four plant species from Flora Ikaria: An ethnopharmacological approach". In GA 2017 – Book of Abstracts. Georg Thieme Verlag KG, 2017. http://dx.doi.org/10.1055/s-0037-1608547.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Rapporti di organizzazioni sul tema "Flora plant"

Batson, W. T., J. T. Jones e J. S. Angerman. Flora of the Savannah River Plant. Office of Scientific and Technical Information (OSTI), gennaio 1985. http://dx.doi.org/10.2172/5105908.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Leis, Sherry. Vegetation community monitoring at Lincoln Boyhood National Memorial: 2011–2019. National Park Service, aprile 2021. http://dx.doi.org/10.36967/nrr-2284711.

Testo completo

Abstract (sommario):

Lincoln Boyhood National Memorial celebrates the lives of the Lincoln family including the final resting place of Abraham’s mother, Nancy Hanks Lincoln. Lincoln’s childhood in Indiana was a formative time in the life our 16th president. When the Lincoln family arrived in Indiana, the property was covered in the oak-hickory forest type. They cleared land to create their homestead and farm. Later, designers of the memorial felt that it was important to restore woodlands to the site. The woodlands would help visitors visualize the challenges the Lincoln family faced in establishing and maintaining their homestead. Some stands of woodland may have remained, but significant restoration efforts included extensive tree planting. The Heartland Inventory and Monitoring Network began monitoring the woodland in 2011 with repeat visits every four years. These monitoring efforts provide a window into the composition and structure of the wood-lands. We measure both overstory trees and the ground flora within four permanently located plots. At these permanent plots, we record each species, foliar cover estimates of ground flora, diameter at breast height of midstory and overstory trees, and tree regeneration frequency (tree seedlings and saplings). The forest species composition was relatively consistent over the three monitoring events. Climatic conditions measured by the Palmer Drought Severity Index indicated mild to wet conditions over the monitoring record. Canopy closure continued to indicate a forest structure with a closed canopy. Large trees (>45 cm DBH) comprised the greatest amount of tree basal area. Sugar maple was observed to have the greatest basal area and density of the 23 tree species observed. The oaks characteristic of the early woodlands were present, but less dominant. Although one hickory species was present, it was in very low abundance. Of the 17 tree species recorded in the regeneration layer, three species were most abundant through time: sugar maple (Acer saccharum), red bud (Cercis canadensis), and ash (Fraxinus sp.). Ash recruitment seemed to increase over prior years and maple saplings transitioned to larger size classes. Ground flora diversity was similar through time, but alpha and gamma diversity were slightly greater in 2019. Percent cover by plant guild varied through time with native woody plants and forbs having the greatest abundance. Nonnative plants were also an important part of the ground flora composition. Common periwinkle (Vinca minor) and Japanese honeysuckle (Lonicera japonica) continued to be the most abundant nonnative species, but these two species were less abundant in 2019 than 2011. Unvegetated ground cover was high (mean = 95%) and increased by 17% since 2011. Bare ground increased from less than 1% in 2011 to 9% in 2019, but other ground cover elements were similar to prior years. In 2019, we quantified observer error by double sampling two plots within three of the monitoring sites. We found total pseudoturnover to be about 29% (i.e., 29% of the species records differed between observers due to observer error). This 29% pseudoturnover rate was almost 50% greater than our goal of 20% pseudoturnover. The majority of the error was attributed to observers overlooking species. Plot frame relocation error likely contributed as well but we were unable to separate it from overlooking error with our design.

Gli stili APA, Harvard, Vancouver, ISO e altri

Offriamo sconti su tutti i piani premium per gli autori le cui opere sono incluse in raccolte letterarie tematiche. Contattaci per ottenere un codice promozionale unico!