Predictive models relating species richness of rare plants to measured habitat variables were developed using data from the shoreline vegetation lakes in southwestern Nova Scotia. These contain large disjunct populations many Atlantic Coastal Plain plant whose main ranges are along eastern seaboard United States. The coastal plain herbs was easier predict than "background flora" wide—ranging noncoastal elements. Multiple—regression accounted for 83% variability but only 45% that background...

ABSTRACT Measurements of 15-min average PM2.5 concentrations were made with a real-time light-scattering instrument at both outdoor (central monitoring sites in three communities) and indoor (residential) locations over two seasons the Minneapolis-St. Paul metropolitan area. These data are used to examine within-day variability indoors outdoors, as well matched indoor-to-outdoor (I/O) ratios. Concurrent gravimetric measurements 24-hr also obtained way compare measures this more traditional...

Summary The fleshy fruited species of Vaccinium are known for their spatial dispersal ability but have generally been found to poor representation in soil seed banks. A buried experiment was conducted with 28 , which lots were exhumed at intervals up 17 years. Mean longevity 8.65 For five that persisted 15–17 years, regression indicates survival times more than 20 Climatic factors (particularly annual temperature range the centre species’ distribution range) alone accounted 42% variation and...

Vegetative cover, fruiting phenology, and seed production was estimated from six Vaccinia heathlands on the Avalon Peninsula of Newfoundland so that efficacy Vaccinium bank could be ascertained. Out species present in this vegetation, only V. angustifolium boreale were recovered 120 soil cores taken; uliginosum vitis-idaea, two most common these heaths, not represented at all, yet experimentally buried seeds both taxa will successfully germinate when exhumed after 6 years burial. Indeed, 81%...

Maize water suitability (MWS) model was developed at growth stage scale. Frequency and severity of drought were evaluated by combining MWS estimates agricultural meteorological indexes. The each calculated using maize observational data conventional 52 sites in Liaoning during the period from 1981 to 2010. Based on climatic trend abrupt change analysis, spatiotemporal dynamics investigated. Meanwhile, occurrence its also estimated. results showed that variation largely differed different...

(1986). Observations on a Mixed Farm during the Transition to Biological Husbandry. Agriculture & Horticulture: Vol. 4, No. 2, pp. 69-154.

Rosa rugosa is described for the first time as an invasive species associated with coastal sand dunes in Atlantic Canada. Our surveys of 24 beaches on western Cape Breton Island and mainland northern Nova Scotia from Cheticamp to Fox Harbour showed that 11 dune systems (ca. 45%) were colonized. This was more prevalent where R. occurred 9 13 systems, whereas only 2 Four (three Breton) considered heavily colonized 0.4 - 8.8% area cover rugosa. These had 12 42 independent clumps almost...

An understanding of the morphological stability and succession open water wetland ecosystems in Nova Scotia is a priority for informing conservation management critical habitats complex nationally listed, rare, disjunct species. Baltzer Bog Big Meadow southwestern contain stratigraphic records late Holocene moisture variability. shrub bog that formed an elevated, enclosed kettle basin. Excavated sections exposed by peat mining revealed 2 distinct wood-rich horizons are located above...

During August and September 2010, we surveyed the entire 20.4 km perimeter of Brier Island, Nova Scotia, for invasive shrub Rosa rugosa (Rugosa Rose). This island in outer reaches Bay Fundy Scotia is geographically isolated relatively undeveloped. Our objective was to determine extent mechanism invasion R. into different coastal habitats gain insight potential threat native biodiversity from unchecked population growth this monopolizing, rank shrub. Over 300 colonies with mean height over 1...

The reproductive cycle of the black crowberry ( Empetrum nigrum L., Ericaceae) was investigated on exposed headlands Atlantic coast Nova Scotia. At main study site, Gaff Point, aerial photographs revealed a shoreline retreat rate from 1976 to 2011 (ca. 0.3 m·y –1 ), with threefold increase in heath area loss last 10 years relative previous 25 (1976–2001). produces large crop berries and sets up seedlings via three dispersers (gulls, passerines, mink) at sea edge woodland margin. Laboratory...

An analysis of temperature in Nova Scotia, using climate normals for 1961-1990 and records from 1961 to 2020, is presented 16 sites across the province. These show a slight warming trend first 40 years 6.0 ± 0.5 °C (1961-1990), followed by more significant increase average post-1990 1.0 6.7 °C, 7.0 post-1998 period. A jump 1998 such that only few following did mean annual fall below previous step change was coincident with La Niña events increasing Atlantic Ocean temperatures associated...

Forest herbs account for greater species richness than any other plant type in deciduous forests and are the most vulnerable to anthropogenic disturbances. We examined whether limited distribution of rare Appalachian forest Nova Scotia is related edaphic specialization or a history disturbance. Remnant populations restricted floodplain forest, where both habitat factors disturbance differ significantly from those adjacent upland sugar maple forest. Contrasting soil litter layers between...

Twenty species of herbaceous plants and four non-amentiferous shrubs were found in flower March-April Nova Scotia during the spring 2012. Plants observed primarily Kings Antigonish Counties, with several observations from Inverness County. The precocious flowering is attributed to an abnormally warm late winter (February-March) which climate normals for monthly average temperature exceeded by a minimum 1.2°C February (Tracadie) maximum 8.5°C March (Kentville). Flowering was 17 days earlier...