Plant Ecology/Публикации

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Ollerton J.
59
Автор антэкологических публикаций

, Lack A.
Автор антэкологических публикаций

Plant Ecology
4
Журнал с антэкологическими публикациями.
Springer Science+Business Media

. 1998. V. 139. P. 35–47. Статья
Over three years the flowering phenology of individuals of Lotus corniculatus has been studied in relation to fruit set and seed predation to determine the relationships between four components of flowering time, plant size and reproductive success. Timings of first and peak flowering, and duration and synchrony of flowering differed between individuals in the same years. Between years, timing of first flowering was highly correlated for the same individuals, and was closely correlated with plan
t size and duration of flowering–larger plants flowered earlier and for a longer period. Peak flowering and synchrony were not correlated between-years for individuals. Fruit production and seed predation were correlated with some of the components of flowering phenology in some years, but not in others. The inconstancy of these relationships suggests that directional or stabilising selection is not acting consistently on the aspects of reproductive success studied in this work. The inconstancy of selection may result in the rather asynchronous flowering phenologies of individuals of L. corniculatus observed. We emphasize the importance of studying different components of flowering phenology in relation to individual plant size over several seasons. This work has shown that plant size not only has a direct effect on individual plant fecundity but also can influence flowering time and hence indirectly affect reproductive output.
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McIntosh M.E.
Автор антэкологических публикаций

Plant Ecology
4
Журнал с антэкологическими публикациями.
Springer Science+Business Media

. 2002. V. 159. P. 1–13. Статья
Flowering phenology is often strongly constrained by phylogenetic history: many closely-related plants have very similar phenologies. On the other hand, divergent flowering phenologies can function as isolating mechanisms, which may be reinforced if related plants occur sympatrically. I investigated flowering phenology and reproductive output of sister species of barrel cacti, Ferocactus cylindraceus and F. wislizeni, where they occur sympatrically in the Sonoran Desert surrounding Tucson, Arizo
na. Ferocactus cylindraceus began blooming in May, and continued until early or mid-October, with a bimodal pattern of flowering amplitude. Individuals in the study population were moderately well-synchronized phenologically. Ferocactus wislizeni began blooming in July, and also continued until early or mid-October, with a single peak of intensity; individuals in the study population were well- synchronized phenologically. In both species, the vast majority of individuals bloom every year. Plant size was positively correlated with flowering amplitude in both species, and with flowering onset in F. wislizeni. The study population of F. cylindraceus was strongly affected by a flower-eating caterpillar in all years, with the earliest flowers most likely to be destroyed. For F. wislizeni, seed number per fruit was highest for flowers open in the middle of the blooming season in 1998. Other components of individual plant phenology, including among-plant synchrony, had little influence on reproductive output.
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Nishikawa Y.
1
Автор антэкологических публикаций

Plant Ecology
4
Журнал с антэкологическими публикациями.
Springer Science+Business Media

. 2009. V. 202. No. 2. P. 337–347. Статья
I studied the relationship between seed-set patterns within inflorescences and temporal variations in light and pollinator availabilities for 2 years in the spring ephemeral species Gagea lutea in a deciduous forest. Timing of canopy closure and seasonal trend of pollinator frequency did not synchronize with the annual fluctuation in flowering phenology. In the early snowmelt year, seed-set success reflected the seasonal pollinator abundance from early to middle flowering periods. In the late sn
owmelt year, however, seed-set rates were independent of pollinator activity and decreased with canopy closing even after hand pollination. The restricted seed production by defoliation and the increase in seed-set rates at the forest edge suggested that seed production was supported by current photosynthetic carbon gain. Thus, annual fluctuations of reproductive success can explain the variation in flowering phenology within a population although seasonal light deterioration would serve as a selective force for flowering in the early season.
Du G.
3
Автор антэкологических публикаций

, Qi W.
1
Автор антэкологических публикаций

Plant Ecology
4
Журнал с антэкологическими публикациями.
Springer Science+Business Media

. 2010. V. 209. No. 2. P. 321–333. Статья
Flowering timing is of fundamental biological importance for its tight association with pre-flower growth states and subsequent reproduction success. Here, we selected plant height and seed size to represent plant growth and reproduction states, respectively, and analyzed their associations with flowering time in 11 communities together representing a QingHai-Tibetan flora. Trait associations were examined using Pearson correlation analyses (TIPs) and phylogenetically independent contrasts (PICs
) within individual communities and meta-analyses across all communities. The results of TIPs-based and PICs-based analyses were generally congruent, although fewer contrasts were significant with PICs, probably because of low statistical power. Overall, flowering time was negatively correlated with seed size and plant height (i.e., plants with larger seeds and stature started flowering earlier) in various woody communities, but correlations were neutral or positive in herbaceous communities. The seed size–flowering time relationship was negative for woody and herbaceous perennials but not for annual herbs in most communities. The relationship between plant height and flowering time was negative for woody but positive for herbaceous plants. Moreover, the lack of difference in time–size relationships between anemophilous and entomophilous plants suggests that pollination type may only be a secondary force in controlling flowering phenology. Our studies demonstrate that environmental conditions, community structure, and plant life history strategies may affect community flowering time singly or in combination.