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15 results for “Flowering season”
Flower counts in the black sand extended growing season experiment, 2023.
As a result of climate change, the Rocky Mountain Front Range is experiencing warmer summers and earlier snowmelt. Due to the importance of snow for regulating soil temperature, growing season length, and available moisture in alpine ecosystems, even small shifts in the snow-free period could have large impacts. The focus of the Black Sand Extended Growing Season Length Experiment is to examine how terrain-related differences in climate exposure influence the way alpine habitats respond to climate change via earlier snowmelt. To simulate how climate exposure may affect plant communities, NWT LTER researchers established 5 experimental sites each containing a pair 10 x 40m rectangular plots. These sites include north and south facing aspects, subalpine and alpine tundra meadows in a range of hydrological conditions (e.g. dry meadows, moist meadows, wet meadows). We accelerated snowmelt in one plot of each block by adding chemically inert black sand, while keeping the second plot as an unmanipulated control; black sand was added to these plots after snow had naturally melted. This dataset includes ~biweekly flower counts from late June – late August 2023, which can be used to estimate onset, peak, and end of flowering and how these might change under a longer growing season due to black sand application.
Fig. 5. Croton echioides Baill. A–B. Habit. C. Flowering branch. D in Croton sertanejus, a new species from Seasonally Dry Tropical Forest in Brazil, and redescription of C. echioides (Euphorbiaceae)
Fig. 5. Croton echioides Baill. A–B. Habit. C. Flowering branch. D. Inflorescence showing pistillate flowers and staminate buds, detail of the pistillate flowers in the insert. E. Pistillate flowers. F. Median portion of an inflorescence with bisexual cymules containing one pistillate flower and one staminate bud. G. Detail of the staminate inflorescence. H. Staminate flowers. I. Staminate flowers and buds. J. Fruit. K. Fruit columella. L. Apex of columella with three slightly ascending tips. M. Seed, dorsal side. N. Seed, ventral side. A, F–I. = Population from Igaporã, Bahia (R.C. Sodré et al. 3284; BOTU); B–E. = Population from Abaíra, Bahia (R.C. Sodré et al. 3314; BOTU); J–N. = V.C. Souza et al. 5495 (ESA). Photographs: R.C. Sodré.
Fig. 4. Croton echioides Baill. A. Flowering branch. B in Croton sertanejus, a new species from Seasonally Dry Tropical Forest in Brazil, and redescription of C. echioides (Euphorbiaceae)
Fig. 4. Croton echioides Baill. A. Flowering branch. B. Detail of the indumentum of the stems and stipule. C 1 –C 2. Trichomes of the stems. C 1. Stellate-rotate trichome. C 2. Stellate-porrect trichome. D 1 –D 2. Stipules. D1. Surface. D 2. Ventral surface. E 1–E3. Leaves, note the variation in the shape of the leaf blades and in the length of the petioles. F1–F3. Extrafloral nectaries of leaf base in abaxial view. F1. Stipitatepatelliform. F 2. Obconic. F 3. Cylindric. G. Colleters of leaf margin in adaxial view. H 1. Leaf indumentum of the abaxial surface. H 2. Leaf indumentum of the adaxial surface. I. Inflorescence. J 1. Staminate flower bract, ventral surface. J 2. Staminate flower bracteole, ventral surface. K. Staminate flower. L 1 –L 2. Lobes of staminate flower calyces in dorsal view. L1. Dense indumentum. L2. Sparse indumentum. M1–M2. Staminate flower petals in dorsal view. M1. Obovate petal. M2. Oboval-oblanceolate petal. N. Stamen. O 1. Pistillate flower bract, ventral surface. O 2 –O 3. Pistillate flower bracteoles, ventral surface. P. Pistillate flower. Q. Pistillate flower in upper view showing ventral surface of the sepals, disk and reduced petals (gynoecium removed), note the unequal sepals. R 1 –R 2. Indumentum of ventral surface of the pistillate flower sepals. S. Pistillate flower in lower view showing dorsal surface of sepals. T. Indumentum of dorsal surface of the pistillate flower sepals. U. Gynoecium. V. Nectary disk and reduced petals of the pistillate flowers (cut out sepals and gynoecium removed). W. Fruit. X 1. Fruit columella. X 2. Apex of columella with plane tips. X 3. Apex of columella with three slightly ascending tips. Y 1. Seed, dorsal side. Y 2. Seed, ventral side. Drawing by Renato Galhardo: A, E2, F1 = E. Melo et al. 7571 (HUEFS); E1, F3, O1–V = R.C. Sodré et al. 3284 (BOTU); B–D2, G–N = R.C. Sodré et al. 3314 (BOTU); E3, F2, W–Y2 = V.C. Souza et al. 5495 (ESA).
Assessing seasonal richness of active flowers throughout UC Reserve sites in the 20th Century
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Anaktuvuk River fire scar eriophorum vaginatum flowering during the 2008-2014 growing seasons
The Anaktuvuk River Fire occurred in 2007 on the North Slope of Alaska. In 2008, three eddy covariance towers were established at sites representing unburned tundra, moderately burned tundra, and severely burned tundra. Eriophorum vaginatum flowers were counted from annual photographs of each site during peak flowering season (6/17-7/20).
Characterization of leaf transcriptome in a tropical tree species, Shorea curtisii, over a flowering season
<p><span>General flowering (GF) is a synchronous flowering event in the Southeast Asian tropical rainforests that occurs at irregular intervals of multiple years. The unpredictable intervals of GF raise conservation concerns for these under-researched forests with rich economically and ecologically important species. In this study, the leaf transcriptome of a GF species, <em>Shorea</em> <em>curtisii</em> obtained from three time points – before and after floral initiation, and post flowering stage – was sequenced. We assembled 243,759,478 sequencing reads into 39,943 non-redundant unigenes including 677 putative homologs of <em>Arabidopsis</em> <em>thaliana</em> flowering-related genes. Differential expression analysis conducted on pairwise comparisons of the time points identified 930 differentially expressed unigenes, which includes 17 flowering-related homologs. The differential expression of unigenes with significant enrichments of functions related to drought corroborated the involvement of drought as an environmental cue for GF. The outcomes of this study offer an insight into the conservation of floral regulatory genes and pathways in Shorea and could be used as a model to better understand the floral initiation cues and regulation of GF trees.</span></p>
Data from: Seasonality in the equatorial tropics: Flower, fruit and leaf phenology of montane trees in the highlands of southwest Uganda
<p>Phenology influences many forest functions and can inform forest conservation and management, yet representative phenological data for most common tropical forest tree species remain sparse or absent. Between June 2011 and December 2013, we investigated flowering, fruiting and leafing patterns in the Bwindi Impenetrable National Park, a montane forest located near the equator in Uganda, drawing on 16,410 observations of 530 trees of 54 species located between 2,066 and 2,527 m in elevation. The park's climate is equatorial with two wet and dry seasons each year. Flowering and fruiting were strongly seasonal while patterns in leafing were less pronounced. Flower occurrence peaked at the beginning of the short dry season followed by a pronounced trough during the beginning and the middle of the short wet season. Fruit occurrence had a pronounced peak during high rainfall months in March through April with most fruits ripening during drier months in May through July. Fruit scarcity was observed for a 4-month period spanning September to December and most flushing of leaves noted at the end of the wet season in November and December. Our binomial generalised linear mixed models (GLMM) indicated that flowering and fruiting were negatively associated with temperature and that leafing activity was positively associated with rainfall and temperature. These findings are consistent with the insolation- and water-limitation hypotheses suggesting that the seasonally varying availability of resources such as light, water and nutrients determines these phenological patterns. Ideally, prolonged, multi-year community-level studies would be supported so as to better characterise the influence of climate and of climate variability.</p>
Characterization of leaf transcriptome in a tropical tree species, Shorea curtisii, over a flowering season
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Data from: Seasonality in the equatorial tropics: Flower, fruit and leaf phenology of montane trees in the highlands of southwest Uganda
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Data from: Differing impacts of two major plant invaders on urban plant-dwelling spiders (Araneae) during flowering season
<p>The dataset contains spider (Araneae) specimen numbers collected from flowering invasive American goldenrod (<em>Solidago canadensis/gigantea</em>) and invasive Himalayan balsam (<em>Impatiens glandulifera</em>) stands occuring naturally in urban areas of the city of Karlsruhe, Germany. Corresponding plots with native ruderalized vegetation in direct vicinity of each invaded plot were used as a comparison plot, resulting in a fully paired design for each plant invader study. An additional column represents potential non-araneae prey items collected together with the spiders from each stand. Spider specimens were determined to the family level as well as classified into web builders and hunters without a web.</p>
Data from: Association between rainfall seasonality and the flowering of epiphytic plants in a Neotropical montane forest
The association between the reproductive phenology of epiphytic communities with environmental and ecological factors remains largely unexplored. Because epiphytes depend on environmental moisture, seasonal changes in moisture conditions likely act as the primary determinants of their reproductive timing. We examined whether water limitation or pollinator competition structures the flowering phenologies of an epiphytic community in a seasonal mountain forest in Costa Rica. Additionally, we addressed the environmental factors that might trigger floral induction. Using a 24-month dataset of bimonthly flowering records from 104 species, we found high seasonality of flowering at the species level but somewhat lower seasonality at the community level. The flowering mid-dates of most epiphytes, particularly from monocotyledonous species, occurred during the wettest months, as predicted if water limitation structures flowering. The increased moisture and nutrient availability during the rainy season give epiphytes the resources needed to complete floral development and anthesis, and later fruit and seed maturation. The observed flowering pattern of epiphytes coincides with reproductive patterns of terrestrial herbs and shrubs from seasonal tropical ecosystems, and suggests shared constraints to sexual reproduction in both ecological guilds under similar climatic conditions. In contrast, flowering patterns of congeneric epiphytes in the same pollination guild mostly did not follow the expectations of a pollinator competition scenario. Finally, we discuss the possible combined effect of precipitation, temperature, and daily insolation on floral induction of epiphytic plants.
FIGURE. Petalidium mannheimerae, habitat and habit. A. Plant in flower during a particularly dry season (Aussenkjer [Aussenkehr] 147 Farm, ||Kharas Region, Namibia). B. Plant in full flower (Kosies, Richtersveld, Northern Cape, South Africa). Photographs by L. Nanyeni (A) & M. Koekemoer (B). in Petalidium mannheimerae (Acanthaceae), a new species from Namibia and South Africa, with notes on the taxonomic identity of P. parvifolium
FIGURE. Petalidium mannheimerae, habitat and habit. A. Plant in flower during a particularly dry season (Aussenkjer [Aussenkehr] 147 Farm, ||Kharas Region, Namibia). B. Plant in full flower (Kosies, Richtersveld, Northern Cape, South Africa). Photographs by L. Nanyeni (A) & M. Koekemoer (B).
Alien plants and flower visitors disrupt the seasonal dynamics of mutualistic networks - Dataset
<p>Dataset associated with the manuscript "Alien plants and flower visitors disrupt the seasonal dynamics of mutualistic networks" (Arroyo-Correa et al. 2019)</p>
Data from: Association between rainfall seasonality and the flowering of epiphytic plants in a Neotropical montane forest
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Data from: Differing impacts of two major plant invaders on urban plant-dwelling spiders (Araneae) during flowering season
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.