Wetlands provide habitat for a wide variety of plant and animal species contribute significantly to overall biodiversity in Ireland. Despite these known ecosystem services, the total wetland area Ireland has reduced over past few decades leading an ongoing need protect such environments. The EU Habitats Directive (92/43/EEC) recognised several wetlands types as "priority" habitats. This study concentrates on subset priority habitats focussing some groundwater dependent terrestrial...

Monitoring wetlands is necessary in order to understand and protect their ecohydrological balance. In Ireland, traditionally wetland-monitoring carried out by manual field visits which can be very time-consuming. To automate the process, this study extends ability of remote sensing-based monitoring combining RGB image processing, machine learning algorithms, satellite data analysis create seasonal maps vegetation communities within wetlands. The methodology matches multispectral broad...

S ummary The tolerance of Geum rivale L. and G. urbanum to soil waterlogging was investigated by growing plants in a compost under variety flooding regimes. Chemical analyses showed that high concentrations available ammonium, iron manganese but almost no nitrate could be extracted from this if conditions became sufficiently reducing, though considerable period required for such reducing develop. This slow rate reduction may due the absence an anaerobic microflora loam base compost....

S ummary Geum rivale L. and G. urbanum were grown in drained, continuously flooded or transiently compost for 21 weeks. Leaf root material harvested after this time was analyzed Fe, Mn, Ca P. Mn Fe concentrations roots leaves of both species increased by flooding. Higher accumulated the roots, while present roughly equal leaves. concentration higher than that roots. Although significantly , there no readily interpretable effects waterlogging. P decreased although much less effect flooding on...

We studied the phenology of leaf production and loss, flowering, fruiting on Henderson Island, a raised limestone island situated at 24?S in Central South Pacific. The one-year study encompassed 19 22 wide-spread indigenous tree shrub species found plateau forest. Of 11 showing significant annual variation production, all grew most new leaves immediately after solar zenith between January March, when temperatures were highest. Thirteen showed with peaks October/ November or January/February....

The vegetation of the raised coralline Henderson Island and Oeno Atoll (Pitcairn Group, south-central Pacific Ocean) is described from cover-abundance values vascular flora sampled in 10 times m quadrats. Exploratory data analysis by detrended correspondence two-way indicator species was used to summarize resulting matrices for each island, aid definition types. For Henderson, six major communities are described, which often closely linked geomorphology: beachfront, embayment forests, open...

S ummary Root elongation of Geum rivale and G. urbanum grown in nutrient solution decreased as manganese concentration was increased above 25 mg dm −3 , especially urbanum. Prior exposure roots to Mn their capacity for subsequent solutions, the effect such pretreatment being most pronounced rivale. significantly more tolerant 50 than Efflux potassium from root segments, used a measure membrane permeability, higher at this concentration. Tolerance by progeny hybrid individuals generally...

Abstract Aim To identify how the Pitcairn group relates biogeographically to south‐eastern Polynesian region and if, as a subset of regions flora, it can then be used model for biogeographical analyses. Location The (25°4′ S, 130°06′ W) comprises four islands: Pitcairn, relatively young, high volcanic Island; Henderson, an uplifted atoll, uplift caused by eruption Pitcairn; two atolls, Ducie Oeno. remote location, young age range island types found in Island makes ideal study biogeography...

Germination trials of fifteen rare and endangered Irish plant species, representing twenty-two accessions, were conducted after up to seven years storage in the Threatened Plant Genebank. Seeds had been stored at low moisture content (approximately 5 per cent) temperature (−18°C). A variety results was obtained, with some species showing a significant increase percentage germination, decrease germination others no change. Within consistent not always individual accessions sometimes varied...

The dynamics of Scots pine (Pinus sylvestris L.) in Europe during the Holocene have been spatially and temporally complex. species underwent extirpation reintroduction several north-west European countries. This study investigated late vegetation history a present-day pinewood western Ireland, to test widely accepted hypothesis that P. became extinct Ireland c. AD 400. Palaeoecological, chronological loss-on-ignition analyses were conducted on sediment core extracted from an adjacent lake....

Abstract The unique flora of Ireland, that includes plants with Atlantic, amphi-Atlantic and Mediterranean affinities, has attracted the attention many biogeographers. Using a database, this paper compiles Irish Pleistocene plant fossil record examines disappearances some taxa continuity others. A retreat to east since Tertiary, movement arctic-alpine species north mountains, long Atlantic taxa, including not present in Britain, can be identified. Middle Gortian temperate stage is examined...