scholarly journals LATE BLOOMING OF PLANTS FROM NORTHERN NOVA SCOTIA: RESPONSES TO A MILD FALL AND WINTER

2011 ◽  
Vol 46 (2) ◽  
Author(s):  
David J. Garbary ◽  
Jonathan Ferrier ◽  
Barry R. Taylor
Keyword(s):  
Climate Change ◽  
Nova Scotia ◽  
Woody Plants ◽  
Regional Climate ◽  
Growing Season ◽  
Flowering Phenology ◽  
Flowering Date ◽  
Cornus Sericea ◽  
Allium Schoenoprasum ◽  
Herbaceous Dicots

Over 1400 flowering records of 135 species were recorded from over 125visits to more than 20 sites in Antigonish County, Nova Scotia from November2005 to January 2006, when the growing season is normally over. The speciesidentified were primarily herbaceous dicots; however, there were four speciesof woody plants (Cornus sericea, Spiraea latifolia, Symphoricarpos albusand Salix sp.) and one monocot (Allium schoenoprasum). The number ofspecies flowering declined linearly as fall progressed, as did the amountof flowering for each species. Nevertheless, over 40 species were still inflower in early December, and over 20 species flowered in January. Thefinal flowering date was 21 January, when ten species were found. Thiswork builds on a previous study in 2001, when 93 species were recordedin flower during November-December. In addition to the 30% increase inrecorded species in 2005, almost 50% of the species found in 2005 werenot recorded in 2001. This study provides an expanded baseline againstwhich changes in flowering phenology can be evaluated with respect tosubsequent regional climate change.Key Words: Antigonish, flowering, Nova Scotia, phenology, climate change

scholarly journals EARLY SPRING FLOWERING IN NOVA SCOTIA: AN EXTREME SPRING IS REFLECTED IN ADVANCED FLOWERING

2013 ◽  
Vol 47 (2) ◽  
Author(s):  
Nicholas M. Hill ◽  
David J. Garbary
Keyword(s):  
Climate Change ◽  
Nova Scotia ◽  
Regional Climate ◽  
Regional Climate Change ◽  
Flowering Phenology ◽  
Early Spring ◽  
Late Winter ◽  
Climate Conditions ◽  
Precocious Flowering ◽  
Native Group

Twenty species of herbaceous plants and four non-amentiferous shrubs were found in flower in March-April in Nova Scotia during the spring of 2012. Plants were observed primarily in Kings and Antigonish Counties, with several observations from Inverness County. The precocious flowering is attributed to an abnormally warm late winter and spring (February-March) in which climate normals for monthly average temperature were exceeded by a minimum of 1.2°C in February (Tracadie) to a maximum of 8.5°C in March (Kentville). Flowering was an average of 17 days earlier than herbarium records in the largest regional herbaria (ACAD, NSAC). Proportional contribution to the early flowering guild was greater for exotic species which featured weedy families not represented in the native group. These observations of spring climate conditions and flowering phenology are consistent with regional climate change associated with milder and earlier springs.Key Words: climate change, Nova Scotia, phenology, spring flowering, exotic range expansion.

scholarly journals The influence of experimental warming on flowering phenology of Moss Campion, Silene acaulis / Experimentel hiting ávirkar blóming hjá leggstuttari túvublómu (Silene acaulis)

2017 ◽  
Vol 59 ◽  
pp. 104
Author(s):  
Anna Maria Fosaa ◽  
Olivia Danielsen ◽  
Herborg Nyholm Debes
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
Growing Season ◽  
Flowering Phenology ◽  
Flowering Period ◽  
Experimental Warming ◽  
Flowering Stage ◽  
Silene Acaulis ◽  
First Flowering Date ◽  
Temperature Manipulation

<p><strong>Úrtak</strong></p><p>Í níggju ár kannaðu vit, á hvønn hátt experimentel hiting ávirkar tey ymisku stigini í blómingini hjá leggstuttari túvublómu, <em>Silene acaulis </em>í Føroyum. Hitin varð experimentelt øktur við smáum sekshyrntum vakstrarhúsum, ið eru gjørd úr polycarbonate. Tey eru opin í erva og tí navnið „Open top Champers“ (OTC). Kanningarnar vórðu gjørdar í fjallaøki í 600 m hædd, har blómustigini hjá leggstuttari túvublómu regluliga vórðu mátað í vakstrartíðini frá mai til juli mánað í tíggju OTC og tíggju kontrollum. Kanningarnar, ið vit skriva um í hesi grein, eru frá 2001 og hvørt ár frá 2007­2010. Vit skrivaðu upp tíðarskeiðið, tá fyrsti blómuknubbin var sjónligur, tíðarskeiðið tá fyrsta blóman var útsprungin, tá fyrsta og seinasta   krúnublað   følnaði. Kanningarnar eru ein partur av altjóða samstarvinum „International   Tundra   Experiment“ ITEX, ið er eitt samstarv millum fleiri støð serliga á norðraru hálvu, har kanningar verða gjørdar. Kanningarnar  hava  til  endamáls  at  granska árinið av veðurlagsbroytingum á plantuvøkstur. Úrslitini frá hesari kanning vísa greiðar munir millum OTC og kontrollarnar. Sum heild komu øll stigini í blómingini umleið eina viku fyrr í OTC enn í kontrollunum. Longdin á øllum blómingartíðarskeiðinum var ikki ymisk í OTC og kontrollunum. Okkara OTC øktu bara hitan umleið 1°C um summarið og broyttu neyvan vetrarhitan. Hetta og ymisk onnur viðurskifti gera, at úrslitini ikki siga okkum alla søguna um broytingarnar í føroyskum plantuvøkstri, sum fara at koma av globalu upphitingini.</p><p> </p><p><strong>A</strong><strong>bstract</strong></p><p>Over a period of nine years we studied the influence of experimental warming on the flowering  phenology  of  Moss  Campion<strong>, </strong><em>Silene acaulis </em>in the Faroes. The temperature was experimentally elevated with hexagonal greenhouses called open top chambers (OTC´s) made by polycarbonate. The experiment was conducted in an alpine area at 600 m a.s.l. where the flowering stage of <em>Silene acaulis </em>was measured regularly during the growing season from May to July in ten OTC´s and ten control plots. In this paper, we present observations from 2001 and every year from 2007  to  2010. We  measured  four  events  in the flowering stage: first visible bud (FB), first flowering  date  (FO),  first petal  drop (FPD) and last petal drop (LPD). This experiment is a part of „The International Tundra Experiment“ (ITEX) that is a collaborative, multisite experiment using a common temperature manipulation to examine the influence of climate change on vegetation. The results from our experiment showed statistically significant changes between the OTC´s and the control plots for all four events. Typically, the events occurred about one week earlier in the OTC´s. The length of the flowering period from FB to LPD was not significally different in the OTC´s from the control plots. The warming induced by the OTC´s in our experiment was only about 1oC in the summer and less than that in the winter. This and other confounding effects such as sheltering imply that care should be taken when using our results to predict phenological in the Faroes changes induced by global warming.</p>

Phenological response of tropical plants to regional climate change in Xishuangbanna, south-western China

2013 ◽  
Vol 29 (2) ◽  
pp. 161-172 ◽  
Author(s):  
Junbin Zhao ◽  
Yiping Zhang ◽  
Fuqiang Song ◽  
Zaifu Xu ◽  
Laiyun Xiao
Keyword(s):  
Climate Change ◽  
Sunshine Duration ◽  
Regional Climate ◽  
Temporal Trends ◽  
Regional Climate Change ◽  
Growing Season ◽  
Western China ◽  
Moisture Condition ◽  
Tropical Plants ◽  
Flowering Duration

Abstract:The phenology of temperate plants is vulnerable to climate change. Yet, the phenological responses of tropical plants to climate change are still unclear. In this study, temporal trends (1973–1999) of four phenological events (budburst, growing season, flowering and flowering duration) were studied among 21 plant species in Xishuangbanna Tropical Botanical Garden (south-western China). Fourteen species (67%) showed significant phenological trends during the study period. Seven species (33%) presented delaying trends in budburst (average 1.4 d y−1) and such trend was more likely to be presented in those that started budburst earlier in the dry season. Four species (19%) showed trends of extension in growing season (average of 3.5 d y−1). These vegetative events appeared to be mainly influenced by increasing temperature. Rainfall showed little effects directly, however, the effects of temperature seemed to largely depend on the moisture condition. Flowering duration of five species (24%) was shortened by average 2.1 d y−1 which was most likely to be the result of the decline in sunshine duration during the rainy season. Our results suggest that the phenology of tropical plants has changed significantly in response to the regional climate change but these reactions are somewhat different from those of temperate plants.

scholarly journals The Effects of Climate Change on Variability of the Growing Seasons in the Elbe River Lowland, Czech Republic

2015 ◽  
Vol 2015 ◽  
pp. 1-16 ◽  
Author(s):  
Vera Potopová ◽  
Pavel Zahradníček ◽  
Luboš Türkott ◽  
Petr Štěpánek ◽  
Josef Soukup
Keyword(s):  
Climate Change ◽  
Climate Models ◽  
Regional Climate ◽  
Regional Climate Models ◽  
Growing Season ◽  
Spatiotemporal Variability ◽  
Elbe River ◽  
Study Region ◽  
The Elbe River ◽  
Projected Changes

This research aimed to identify an approach for adaptation of agriculture to increased climate variability and projected changes, taking into account regional specificity of climate change. Changes in the timing of growing season (GS) parameters for both observation and models data were computed using daily mean temperatures for three thresholds that correspond to the physiological requirements of the vegetable types. This research included a new assessment of the potential impacts of climate change on the GS of vegetables grown in the Elbe River lowland, one of the largest farmed vegetable regions in Central Europe. To accomplish this, a comprehensive analysis was conducted of the spatiotemporal variability of the date of the beginning of the growing season (BGS), the date of the end of the growing season (EGS), and the length of the growing season (GSL) for the period 1961–2011. In addition, an assessment was made of the potential changes in the dates of the BGS, EGS, and GSL for the Elbe River lowland, simulated using the regional climate models. Prospective areas for growing thermophilic vegetables in the study region were also determined.

scholarly journals Prediction of precipitation deficit and excess in Bydgoszcz Region in view of predicted climate change/ Prognoza niedoboru i nadmiaru opadu w rejonie Bydgoszczy w świetle przewidywanej zmiany klimatu

2014 ◽  
Vol 23 (1) ◽  
pp. 11-19 ◽  
Author(s):  
Bogdan Bąk ◽  
Leszek Łabędzki
Keyword(s):  
Climate Change ◽  
Regional Climate Model ◽  
Climate Model ◽  
Regional Climate ◽  
Growing Season ◽  
Reference Period ◽  
Boundary Values ◽  
Growing Seasons ◽  
Standardised Precipitation Index ◽  
Predicted Values

Abstract The paper presents the prediction of rainfall shortage and excess in Bydgoszcz region in the growing seasons (April-September) in 2011-2050 in the perspective of climate change. Based on the predicted monthly sum of precipitations for the percentile 50%, calculated by the regional climate model RM5.1 for Poland with boundary values taken from global model ARPEGE, a decrease in the amount of rainfall during the growing season by approximately 55 mm is predicted, compared to 1971-2000 taken as a reference period. The qualification of rainfall shortage and excess was made using the standardised precipitation index (SPI). According to the predicted values of SPI, the occurrence of 38 months of rainfall excess and 40 months of rainfall deficit in the period 2011-2050 is predicted. Dry months will constitute 16% of all months, wet months - 13%, and normal months - 71%. The occurrence of 13 several-month long periods of rainfall excess and 14 such periods of drought are predicted. The longest periods of both wet and dry weather will last 5 months. So long wet periods are expected in 2020, 2022 and 2031, and drought periods in 2017-2018, 2023-2024 and from 2046 to 2049.

scholarly journals Characteristics of Spring Phenological Changes in China over the Past 50 Years

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Junhu Dai ◽  
Huanjiong Wang ◽  
Quansheng Ge
Keyword(s):  
Climate Change ◽  
Time Series ◽  
Woody Plants ◽  
Regional Climate ◽  
Regional Climate Change ◽  
Observation Data ◽  
Phenological Data ◽  
The Past ◽  
The North ◽  
Spatial Differences

In order to understand past plant phenological responses to climate change in China (1963–2009), we conducted trends analysis of spring phenophases based on observation data at 33 sites from the Chinese Phenological Observation Network (CPON). The phenological data on first leaf date (FLD) and first flowering date (FFD) for five broad-leaved woody plants from 1963 to 2009 were analyzed. Since most phenological time series are discontinuous because of observation interruptions at certain period, we first interpolated phenological time series by using the optimal model between the spring warming (SW) model and the UniChill model to form continuous time series. Subsequently, by using regression analysis, we found that the spring phenophases of woody plants in China advanced at a mean rate of 0.18 days/year over the past 50 years. Changes of spring phenophases exhibited strong regional difference. The linear trends in spring phenophases were −0.18, −0.28, −0.21, −0.04, and −0.14 days/year for the Northeast China Plain, the North China Plain, the Middle-Lower Yangtze Plain, the Yunnan-Guizhou Plateau, and South China, respectively. The spatial differences in phenological trends can be attributed to regional climate change patterns in China.

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